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Druck DPI 145 Multi-Function Pressure Indicator User Manual K147

1. 5 20 5 6 Linearity Compensation sssrinin aeai na nennen enne 5 21 5 6 1 Internal Transd GGES ueteri neue ain en Ren e ota cet aed euet 5 22 Fixed Range PRT and Digitally Compensated PRT s sssssss 5 22 Auto RANGING Pall s serment damier 5 23 Resonant Transducers Internal sssssssssssssseese 5 26 5 6 2 External Transd Gets u ect teec emt mn name anne 5 29 Fixed Range PRT and Digitally Compensated PRT s sussssss 5 29 Resonant Transducers External ssssssssssssssseeeses 5 30 5 7 Temperature Effects Compensation sssssssssssssseeeeeees 5 31 5 8 Analogue and Programmable Output Adjustment ssssssssssssss 5 32 6 MAINTENANCE sirnana ertt reae tra e ee HE Ye eire reete eder teen dene 6 1 6 1 Safety Instructions ssssssssssssssssssse eene nennen nennen eene 6 1 6 2 Fuse R DIACEMI NE a qu see cae hepate sauce ane Lame n Re Rc ace knea 6 2 6 3 amp leanltiq EE EE 6 4 6 4 Memory and Clock Support Battery mmrrrrrrrrvrrrrrvrrrrrrrrrrrrrrrrrrrnnrrrrnnerrr nere 6 4 6 5 Approved Service Agents ssssssssssssssssseseeeeeeee eee eene 6 5 K147 Issue No 4 vi NOTE ac atm COM cm contd dc DMM DUT ENT FS ft N C kg LSD PIN mA mm No PRESS PTX RDG RS 232 SCIPI VAC DPI 145 User Manual ABBREVIATIONS Abbreviations are the same in the singular and plural alternating current atmos
2. gt gt e External RPT s o DPI 145 User Manual The DPI 145 instrument accepts a single resonant transducer Each transducer is fitted with a plug to match the EXT RPT socket located on the rear panel Channel M6 is allocated to external resonant transducers If more than one external RPT is used with the equipment it is important to check that the correct transducer is being used This is best carried out using the Cal Status facility as follows Press SET UP followed by MENU SCROLL twice to select third page of Set up Menu Select Cal Status F1 Scroll through Cal Status pages by pressing the Mext F2 key until M6 External Resonant is displayed Check the serial number of the external RPT to be used against the M6 Cal Status page to ensure that they match To use the external RPT proceed as follows Display Units Process Maths 00086 M1 M2 External Resonant moog M4 M5 External DPbb o Plug the external RPT into the EXT RPT socket located on the rear panel of the instrument Press the IND mode switch Select Display F1 from the change indicator setting menu Press Resonant F4 and select External F3 The instrument prompts for the transducer output to be selected for display Ext RPT On K147 Issue No 4 4 Operation 4 33 o Select On F1 to enable the display or off to disable the display For users requiring details of the external RPT conn
3. K147 Issue No 4 Ifo 5 4 5 2 2 Cal Status Menu DPI 145 User Manual The Cal Status menu provides a log of the calibrations and calibration dates for the internal and external transducers fitted to the instrument and for the Ratio and Electrical Calibrations It also provides across reference to the serial numbers of the internal and external measurement transducers The Cal Status menu is accessible from the SETUP menu as follows SET UP Units Channel Option Barometer 0000 Output Comms Printer External 0000 Cal Status Cal Test Display Calendar 000 Previous Next ee DOD gt gt gt gt Press the SETUP key and enter the Setup Pin if set Press Menu Scroll twice to obtain the third page of Set up Options Select Cal Status F1 This gives access to the first page of the Cal Status menu e g Ratio Calibration Dates Transducer Supply 4 01 95 Span Cal Sig 4 01 95 Previous Next Use the Next F2 key to step through all the Cal Status pages which are presented in the following order Ratio Calibration Dates Electrical Calibration Dates M1 Internal Druck PRT M2 Internal Druck PRT M3 External PRT Nos 1 to 10 sequentially M4 Internal Resonant RPT M5 Internal Resonant RPT M6 External Resonant RPT Once away from the first screen the Previous F1 key can be used to step back one screen for each press K147 Issue No 4 5 Cal
4. o Select Print F3 from the Select Replay Format menu The selected file is downloaded and printed as soon as the Print key F3 is pressed NOTE f any difficulties are experienced with the printout check that the instrument is configured for the correct type of printer refer to Section 4 4 3 e Upload Selection of the Upload option causes all data associated with the selected Data Log file to be uploaded to an external system via the RS232 port This file is sent as ASCII text and as such is readily readable and importable into common spread sheets such as Microsoft Excel The RS232 port is config ured from the Set up facility refer to Section 4 4 2 To upload a file to an external system proceed as follows K147 Issue No 4 4 56 RECALL o Note Pad o o e Datalog Replay Directory Delete DODONW Display Graph Print I Upload DPI 145 User Manual o Press RECALL and select Datalog F4 from the Select Replay Mode menu Select REPLAY F1 from the Data Log menu When Replay is selected a directory showing the first page of data log files is displayed To replay a Data Log file select the required file using the Page Up F1 Page Down F2 T F3 or 4 F4 cursor keys and press the ENTER key on the numeric key pad Four display modes are then provided these being termed Display F1 Graph F2 Print F3 and Upload F4 o Select Upload F4 from select Replay format menu
5. RECALL o Press RECALL key Note Pad o Press the Config F3 key A list of up to six previously Config Datalog stored configurations IS NOW presented o Press RECALL key 2 IND 2 3 BARO 4 OPTION 4 5 OPTION 2 6 EMPTY Select Screen Configuration Store Select OK o Position the reverse video cursor over the required configuration store location using the Select F1 key and select location using the OK F4 key The selected configuration is now recalled to the screen K147 Issue No 4 4 58 DPI 145 User Manual 4 13 Software Options Aeronautical There are two software options available for the DPI 145 the Aeronautical Option and the Airfield Option The following sections detail the operation of the Aeronautical Option This option enables the instrument to be configured to provide the following displays Altitude in feet and metres Calibrated Airspeed C A S in knots or km hr Rate of Climb R O C in ft min or m min Pitot Pressure in any units of the instrument Static Pressure in any units of the instrument Qc AP in any units of the instrument Mach The display of the instrument can be configured to show any one parameter or combination of parameters up to a maximum of all seven if necessary Two pressure channels are required by the Aeronautical Option one for the Qc pressure and on for the Static pressure The Oc pressure is measured by an internal differential pressure transducer
6. A BNC socket is provided for analogue output This socket can be programmed to source current or voltage These electrical outputs can also be set to be proportional to any measurand e g either pressure or the resultant of any processed channel It may also be programmed to a particular voltage or current The instrument also provides a BNC socket to enable the instrument to accept trigger inputs for its internal Data Logger and Pressure Switch functions An RS232 or optional IEEE 488 interface provides a communication channel between the instrument and a printer or computer system An internal power supply unit provides all the regulated supplies that are needed to power the instrument and to source the electrical output signals The instrument has the facility to be either a c mains powered or powered from an external d c source K147 Issue No 4 2 2 DPI 145 User Manual The instrument s display can be configured to show the output of a single measuring channel or any number of channels simultaneously together with the clock time up to a maximum number of eight channels If a group of channels are being displayed simultaneously the character size is automatically adjusted and the display partitioned to accommodate the read out associated with each channel KEYBOARD PROCESS CHANNELS i AUTO RANGING PAIR Chan 1 amp 2 option BACK LIT 1 LCD LP 2 BAR n E Ipo sol d
7. Refer to Section 4 11 1 for B use of this utility dus o Select Record F1 from the Data Log Menu A prompt to continue with the Data Log function or to Quit is now given Will log the current display 14 50 46 Continue Quit o Press the Continue F1 function key A file identity number is first requested followed by a dialogue prompting for the required Start and Stop parameters Refer to Section 4 11 2 for details for the operation of the Data Log Record Mode o For details of the methods of replaying recorded Data Log data refer to Section 4 11 3 K147 Issue No 4 4 44 DPI 145 User Manual 4 11 1 Use of Data Log Directory and Delete Functions e Directory Selection of the Directory F3 option from the Data Log menu provides a list of all the completed Data Log operations that have been stored in the instruments memory These will be listed in the order in which the Data Log Operations were carried out not in file number order A typical directory listing is shown below File ID Data Log Free Blocks 10846 o Note Pad er A17966 28 01 93 15 37 10 e Datalog A17222 28 01 93 15 40 03 ive C070842 28 01 93 15 51 32 a Record a B2 28 01 93 15 58 17 m Directory a Delete Page Up Page Down The e g Free Blocks 10846 legend gives an indication of the remaining memory space and the first page of the directory five entries is displayed The Page Up and Page Down functions allocated
8. 4 3 2 Set up Data Communications e Comms To set up the instrument s data communications parameters proceed as follows o Switch the instrument ON a os o Press the SET UP key o Option o Barometer gt gt 6 Press Menu Scroll to select second page of Set up o Output options e Comms o Printer o External o Select Comms F1 from the Set up menu If the IEEE 488 a RS232 option is installed the instrument now prompts for either a IEEE the RS232 or IEEE to be selected for Set up If no IEEE 488 is installed the RS232 Set up menu is presented immediately EB RS232 Set up Selecting RS232 from the Set up menu or COMMI only if no IEEE 488 option is present provides a status report of the currently set Comms parameters and the facility to set up the Baud rate F1 Parity F2 and Handshake F3 parameters of the RS232 communication protocol Baud rate 9600 Parity none HS Hardware Baud rate Parity Handshake D Baud rate o Units s ee This option allows the baud rate to be set up via the o Barometer gt gt Previous F1 and Next F2 keys The current setting is rete indicated by an arrow A typical baud rate display is shown Comms below o Printer Select baud rate o External m RS232 110 600 4800 D dekk 150 1200 9600 X 300 2400 19 2K Baud rate Parity Handshake Previous Next After setting up the required baud rate press Exit Menu to return to the Comms sub menu Repeat Exit Menu o
9. 5 EE SET UP o Units o Channel o Option o Barometer o Output o Comms o Printer o External o Cal Status e Cal Test o Display o Calendar Pressure Electrical Ratio M1 M2 External Resonant e Linearity o TC o 2Point o gt gt a DPI 145 User Manual O 2 Bar Transducer Enter the Cal Adjustment menu as detailed in Section 5 4 2 and select Pressure F1 Select channel M2 F2 This selects the 2 bar transducer Select Linearity F1 Connect the channel input to a pressure measurement standard deadweight tester Note that an auto ranging pair has only one pressure input and one reference input Apply lowest pressure e g 1 bar and in response to the prompt Enter applied Pressure 1 Enter the applied pressure measured on the pressure standard on the numeric key pad followed by ENTER NOTE To apply negative pressures apply a positive pressure to the reference input Press the Accept F1 key to accept the entered prompt pressure In response to the following prompt Another Point Yes No K147 Issue No 4 5 Calibration 5 25 m Select Yes F1 and enter the applied pressure measured on the pressure standard on the numeric key pad followed by ENTER NOTE Aminimum of five points are required for a linearity calibration Typically 14 are used spread throughout the operating range 1 to 2 bar of the 2 bar tra
10. 2 Point oeoo O Enter the Cal Adjustment menu as detailed in Section 5 4 2 and select Pressure F1 Select channel M2 this selects the 2 bar transducer Select 2 Point F3 Connect the channel input to pressure measurement standard deadweight tester Note that an auto ranging pair has only one pressure input Use the same deadweight piston for both the 1 to 2 bar M2 and O to 20 bar M1 2 point calibrations K147 Issue No 4 5 EN 5 16 DDOE oeoo DPI 145 User Manual Apply lowest pressure 1 bar and in response to the prompt Enter applied Pressure 1 Enter the applied pressure measured on the pressure standard on the numeric key pad followed by ENTER NOTE 1 bar is applied by applying a positive pressure of 1 bar to the reference port Press the Accept F1 key to accept the entered pressure Apply the full scale pressure for the 2 bar transducer i e 2 barg and in response to the prompt Enter applied Pressure 2 Enter the applied pressure measured on the pressure standard on the numeric key pad followed by ENTER Press the Accept F1 key to accept the entered pressure The display briefly displays the following message e 9 Calculating Coefficients Please Wait before returning to the Pressure Cal Adjustment menu Check calibration at 25 0 5 barg and 75 1 5 barg of full scale If calibration is out of specification a linearity compensation s
11. Options IEEE AERO AIRFIELD Times Used 1 Installed on S N 16061 Option Key is no longer valid Quit Note that the serial number of the instrument and the time of installation is written to the key which following installation cannot be reused o Press Quit F1 and remove the software key from the EXT PRT socket The options are now enabled and available for use K147 Issue No 4 TE 3 16 DPI 145 User Manual K147 Issue No 4 4 Operation 4 1 4 1 1 OPERATION General This section describes the use of the DPI 145 instrument has been structured on a functional basis The instrument can be fitted with up to six measurement channels and operates in one of two basic modes indicator or barometer When configured as an indicator it can be set as a pressure switch tester and as a leak tester When configured as a barometer the instrument will indicate QFE local barometric pressure QFF barometric pressure at Sea Level 3 hour Trend and as a Barograph The Store and Datalog features of the instrument are applicable to both the indicator and barometric modes of operation In addition to the pressure indicator and barometric pressure monitoring facilities the instrument can generate electrical output voltages and currents These electrical outputs can be programmed to any level within the range of the instrument or be linearly related to any measurand or process channel The electrical output facilities ar
12. PRT type and the Static pressure by an internal absolute transducer RPT type 4 13 1 Form of Test The DPI 145 instrument is a pressure indicator and so an external controller is required to generate the appropriate Oc and Static pressure for the type of test required Fig 4 3 shows a typical set up CONTROLLER REGULATOR TOTAL STATIC Qc PITOT 2BARDIFF DEVICE UNDER DPI145 TEST E G MACH STATIC 1 BARABS STATIC gt E G ALTIMETER Figure 4 3 Typical Test Set up K147 Issue No 4 4 Operation 4 59 The instrument is effectively connected in parallel with the device under test NOTE The differential Pitot channel of the DPI 145 has the positive input pressure connected to the controller regulator s Total output and the negative input connected to its Static output This channel effec tively measures Oc 4 13 2 Operation To use the instrument for Aeronautical measurements proceed as follows SET UP oeoo Units Channel Option Barometer Aero Airfield Altitude Airspeed ROC Filter Timed ROC 2 bar d 1 bara o Ensure that the equipment is switched off and make the appropriate pressure connections to the rear panel NOTE That the Oc channel has its positive input connected to the Total pressure supply and its negative input to the Static pressure supply Switch the instrument ON and press the SET UP key From the Option Se
13. SN KP10031 SN Undefined SN 17667 SN Undefined SN Undefined SN Undefined SN Undefined SN Undefined Previous Next Channel M3 is allocated to external PRT transducers K147 Issue No 4 4 Operation 4 31 o Check the serial number of the transducer fitted against the serial number of the selected transducer in the table If necessary position the cursor against the required transducer using the Previous F1 and Next F2 keys and press the Select F4 key It should be noted that the calibration routines for external transducers which includes the specification and entry of new external transducer parameters is given in Section 5 If digitally compensated external transducers are used selection of the plugged in transducer is automatic e Display o Press the IND mode switch o Units uc o Select Display from the Change Indicator setting menu us o Press External The instrument prompts for the transducer m External output to be selected for display a Resonant Ext PRT On o Select On F1 to enable the display or Off to disable the display For users requiring details of the external transducer connections the pin out of the External PRT transducer connector is shown in Section 3 6 1 4 K147 Issue No 4 4 32 SET UP o Units o Channel o Option o Barometer o Output o Comms o Printer o External e Cal Status o Cal Test o Display o Calendar Q Previous W Next
14. The channels available for display will be reported as follows Select required display ONH RWY 27L RWY O9L RWY 27R Select channels required for display by pressing the appropriate keys NOTE f the gt gt cursor is displayed another page of selection is available and can be displayed by pressing the Menu Scroll key Fora configured runway to be available for display it must be marked as In Use refer to Set up Runways section in paragraph 4 14 1 K147 Issue No 4 4 Operation 4 69 A typical configured display is shown below Airfield QNH QFE RWY 27L 1034 1 047 mbar QFE RWY O9L 1044 ma Airfield pressures are always shown to the nearest mbar by rounding down the exact pressure in line with airfield practice e Units The Options under this sub menu are used to set up the required pressure units o Aeronautical o Press the OPTION key and select Airfield Airfield F2 o Select Units F2 a Display W Units e o Select either mbar F1 inHg F2 hPa F3 PE as required mbar inHg hPa K147 Issue No 4 4 70 DPI 145 User Manual K147 Issue No 4 5 Calibration 5 1 5 1 CALIBRATION The instrument is supplied by the manufacturer complete with calibration certificate s A calibration period of 12 months is recommended The actual calibration interval depends on instrument usage and the total measurement uncertainty acceptable for the specified applic
15. The selected file is uploaded and printed as soon as the Upload key F4 is pressed NOTE If any difficulties are experienced with the Upload facility check that both the instrument and external data comms system are configured in the same manner Refer to Section 4 4 2 for details of the Data Comms Set up 4 12 Data store Recall Operations The Recall function is used to recall screens stored during use of the instrument Data Log results and stored instrument configurations The following sections detail the method of recalling stored screen and configuration data Data Log recall operations are described in Section 4 11 3 4 12 1 Screen Recall Operations To recall a stored screen to the display proceed as follows RECALL o Note Pad o o e Datalog SCROLLS Press the RECALL key Select Notepad F1 from the Select Replay Mode menu The last stored screen will be presented in reverse video Press Menu Scroll to provide details of the screen currently being displayed K147 Issue No 4 4 Operation 4 57 o Press Menu Scroll to return to the current location display o Press RECALL again to step back to a previous location if required NOTE f a memory location is empty the current time and a status message is displayed There are no channels selected 14 26 4 12 2 Configuration Recall Operations To recall a previously stored instrument configuration to the display proceed as follows
16. gt 20 F S 0 04 rdg lt 20 F S 0 008 F S Auto Ranging PRT Linearity Hysteresis amp Repeatability To 20 Bar F S gt 1 F S 0 025 rdg lt 1 F S 0 00025 F S Resonant Sensors Linearity Hysteresis amp Repeatability 10 30 deg C Temp Effects Sensor Type 0 013 F S Druck RPT All ranges Linearity Hysteresis amp Repeatability 90 Day Stability 0 065 rdg 0 013 F S 0 04 rdg 0 008 F S 0 07 rdg 0 015 F S Linearity Hysteresis amp Repeatability 90 Day Stability 0 04 rdg 0 0004 F S Linearity Hysteresis amp Repeatability Temp 12 Month Stability 0 01 F S Solartron 7881 0 02 rdg plus 0 005 F S All ranges plus 0 01 F S Media Compatibility Fixed Range Piezo Resistive Most fluids Auto Range Piezo Resistive Solartron 7881 Most non corrosive gases Clean dry air refer to manufacturer K147 Issue No 4 DPI 145 User Manual Measurement Noise Typical Values Fixed Piezo Resistive 5 ppm F S Auto Ranging PRT 0 5 ppm F S Resonant 5 ppm F S Update Rate Dependent on number of channels displayed maximum two updates per second Temperature Effects Piezo Resistive 10 to 30 C averaged coefficient 0 002 rdg C Resonant Included in accuracy Interfaces Analogue Output Proportional to selected reading selectable zero and full scale Current Range Voltage Range Accuracy May be selected as volt
17. o Turn the instrument around to gain access to the rear panel o Switch off the power supply to the instrument and remove the IEC moulded connector from the power socket o Insert a screwdriver 1 into one of the recesses in the rear panel as shown in Fig 3 1 release the spring clip 2 retaining the side plate and slide the side plate 3 out approximately 10 mm K147 Issue No 4 3 Installation 3 3 o Release the corresponding side plate on the other side of the instrument in a similar manner and then slide both side plates out together complete with carrying handle 4 o Ensure that the side plates 3 and handle adaptor block assembly are stored in a safe place Itis recommended that for safe storage the side plates be re inserted in the side channels of the instrument o Refit the moulded mains power connector to the power socket and switch the power supply on The instrument is now ready for connection and operation Connection details are given in Section 3 2 to 3 7 Replacement o Switch off the power supply to the instrument and remove the IEC moulded connector from the power socket o If the side plates 3 are stored in the side channels release retaining spring with a screwdriver and slide out of the instrument o Slot the side plates 3 into the adaptor blocks 5 see also Fig 3 2 fit the handle across the instrument and slide in side plates until they lock o Replace the moulded IEC connector and
18. Airfield a Display o Select Timed ROC F1 and the following prompt is a Units presented m Timed ROC D Start Rate Integration Time 30 seconds h Start Clear Clear o Enter the required Integration period default 30 seconds on the numeric key pad and press ENTER NOTE The method of rate of climb calculation is selected under set up refer to Section 4 13 2 K147 Issue No 4 4 Operation 4 63 OPTION AERO Airfield Display Units Timed ROC Start Clear o Switch on the controller external and when required press the Start F1 key The timed ROC period now commences indicated by the Rate Integration time counting down When the integration period has expired the rate of climb display window is updated Ptotal Pstatic 900 39 mbar 725 37 mbar Rate of Climb Qc Pressure 1 000 ft min 1 25 02 mbar timed Rate Integration Test Complete 30 seconds Start Clear o Toresetthe display to dynamic operation press Exit Menu or to carry out another test press Start F1 e Rate of Climb Low Pass Filter A low pass filter is provided for the ROC channel The filter has a variable time constant and a variable step response The variable step response effectively overrides the filter operation when incremental ROC transients exceed a preset threshold step value To set up the filter parameters proceed as follows SET UP Units Channel Option Barometer Aer
19. Barometer o Output o Comms o Printer o External o Cal Status e Cal Test o Display o Calendar Doom Setup Pin Pressure Electrical Ratio bb M1 M2 External Resonant k k ok M4 M5 External 000 gt gt gt gt Determine the pressure operating range of the transducer s fitted Connect the channel input to an appropriate pressure measurement standard Enter the Cal adjustment menu as detailed in Section 5 4 2 and select Pressure F1 Select Resonant F3 and select required channel for calibration i e M4 F1 or M5 F2 Note only channels configured for display will appear on the menu A menu will now be displayed as follows Resonant 1 Cal menu Constants Frequency Diode BSL The Constants F1 option is used to enter the transducer constants at first calibration and should not normally be required for a recalibration K147 Issue No 4 5 Calibration 5 27 O Stage 1 m Remove the top cover of the instrument to gain access to the main board WARNING Be careful while operating the instrument with the covers removed m Select Frequency F2 from the Resonant Cal Menu The currently entered frequency is displayed and a flashing cursor prompts for the entry of a new frequency 10 MHz frequency 9 999989 B Measure the transducer frequency between PL14 Pin 2 ve and Pin 3 OV Enter the measured frequency on the numeric key pad and pres
20. Both items required 1 3 Associated Publications The following Druck publication is associated with this manual K179 SCPI Commands for Druck Instruments K147 Issue No 4 1 8 DPI 145 User Manual K147 Issue No 4 2 Functional Description 2 1 2 1 FUNCTIONAL DESCRIPTION Fig 2 1 General The DPI 145 is a six channel instrument M1 to M6 designed to process the output of up to three piezo resistive pressure transducers and up to three resonant pressure transducers The piezo resistive channels M1 to M3 may be configured in a number of ways Transducers connected to M1 and M2 are mounted within the instrument case and be either gauge or differential type Alternatively M1 M2 can be utilised for processing the outputs of an auto ranging pair The 1 to 20 bar gauge auto ranging sensor utilises two digitally characterised transducers one covering the 1 to 2 bar range and the other 2 to 20 bar range respectively M3 is used for processing the output of an external PRT transducer This transducer which maybe either a conventional piezo resistive type or a digitally characterised type can cover any range up to 700 bar 10 500 psi The resonant sensor channels are M4 M5 and M6 Channels M4 and M5 are allocated to internally mounted resonant transducers and can be vibrating cylinder or resonant silicon sensors Channel MG is allocated for an externally mounted resonant transducer
21. K147 Issue No 4 4 Operation 4 19 e Channel This option allows the channel number of the Barometric sensor to be selected To change the current channel proceed as follows o Select Channel F1 from the Barometer menu o nits o Channel o Option o In response to the prompt e g e Barometer m Channel Enter new barometer channel a Height a Temperature Enter number of required channel on numeric key pad and press ENTER e Height To change set the height of the selected barometer proceed as follows mm o Select Height F2 from the Barometer menu nits Channel Option o In response to the prompt e g Barometer gt gt eooo Channel Height Temperature D Enter new barometer height Enter height in metres on numeric key pad and press ENTER o Press Exit Menu twice to quit set up K147 Issue No 4 4 20 DPI 145 User Manual e Temperature To change set the ambient temperature of the selected barometer proceed as follows o Select Temperature F3 from the Barometer menu Units Channel o In response to the prompt Option Barometer eooo Enter new barometer temperature Channel Height Temperature D Enternew temperature in degrees Celsius on the numeric key pad and press ENTER o Press Exit Menu twice to quit set up 4 4 Use Instrument as Barometer To select the Barometer mode press the
22. K147 Issue No 4 TE 3 14 3 8 DPI 145 User Manual Installation of Software Options If the software options of the instrument IEEE 488 Aeronautical and Airfield are ordered with the instrument they are enabled during manufacture The following procedure details the method of enabling the options after delivery of the instrument The method of enabling the software options is by means of a Software Key This Software Key is supplied at the time of instrument options purchase and can be used only once To enable software options proceed as follows o Ensure that the instrument is switched off Insert a valid Software Key for the option s to be installed into the EXT PRT socket located on the rear panel of the instrument Switch on the instrument Depending upon the options purchased the display will read as follows The example shows a key giving access to three options e g Option Key DPI 145 One Time Valid Options IEEE AERO AIRFIELD Times Used 0 Install Option Yes No In this example the display shows that the key in use is for a DPI 145 can be used once only has not been used to date valid and will enable the installation of three software options To enable the options listed for use press the Yes F1 key The display will now change to indicate that the key has been used and is no longer valid e g K147 Issue No 4 3 Installation 3 15 Option Key DPI 145 One Time Expired
23. ey PB APS 1 pr pr dog d EZ rat fat gli i INLET 1 V MANIFOLD ane x ig E i x 1 20 BAR Paor A RS232 P prog dog od TERRE INPUT OUTPUT 1 bet tek fut k V 1 EXT PRT MICROCONTROLLER SYSTEM E RPT 1 PROGRAMMABLE pS JANMEROG P ANALOGUE OUTPUTS or INLET amp gt a amp SWITCH TEST SWTEST INPUT RPT INLET amp gt P F 1 IEEE 488 EXTERNAL um option RPT SYSTEM POWER A C POWER SUPPLIES amp DISPLAY H T 1 DCPOWER LOU 1 IN OUT r DPI 145 Figure 2 1 DPI 145 Function Diagram Typical Configuration K147 Issue No 4 2 Functional Description 2 3 2 2 Familiarisation The instrument power switch is located adjacent to the power inlet on the rear panel All other controls are located on the front panel as shown in Figure 2 2 The instrument stores its configuration at switch off and returns to this condition when power is restored All data stored in the instrument memory is also retained when power is removed Den DSG x ls c Figure 2 2 DPI 145 Front Panel Measured values and key functions user dialogue are shown on a back lit graphics Liquid Crystal Display The user alters the function of the instrument using the control keys four of which are function keys labelled F1 to F4 whose purpose at any time is indicated on the display above these keys K147 Issue No 4 2 4 DPI 145 User Manual A range of transducers is avail
24. follows mn o When the Maths function is first selected the instrument o Display displays all the currently configured channels and requests o RUE selection of a channel the first term in the mathematical pesas expression ae Select Pressure Channel m Process 2 bar G 20 Bar G Process F o Following selection of the channel the mathematical A x operator is requested as follows A x 2BarG Select Maths Function x 20BarG I x Process o After selection of the mathematical operator the second term of the expression is requested as follows Select Pressure Channel 2 Bar G 20 Bar G Process K147 Issue No 4 4 Operation 4 29 o If Process is selected as a channel the instrument will prompt for selection of a process for the second mathematical term 2 Bar G Max P1 Displayed 2 Bar G Process1 P2 Displayed Not defined P3 Not defined P4 Not defined P5 Not defined P6 Select Maths Function Select OK Use the Select F1 key to position the cursor over the required channel and press O K F4 The mathematical expression will immediately be placed in the next available process channel and enabled for display NOTE If all the Process channels are currently in use and being displayed one channel will have to be removed from the display using the Display option and the Maths function re specified 4 6 Measuring a Pressure To use the instrument to indicate a pressure proceed as follows
25. has terminated K147 Issue No 4 4 52 DPI 145 User Manual 4 11 3 Data Log Replay Operations Data Log Replay operations are carried out under the RECALL function To replay Data Log results data proceed as follows o Press the RECALL key and select Datalog F4 o Note Pad gt o Select Replay F1 from the Datalog menu e Datalog i re A directory showing the first page of Data Logged files is a displayed a Directory SSH File ID Data Log Free Blocks 10846 gt AF 26123 22 02 93 9 23 40 AX 27000 22 02 93 9 56 10 AY 28000 22 02 93 11 16 20 Page Up Page Down To replay a Data Log file select the required file using the Page Up F1 Page Down F2 1 F3 or 4 F4 cursor keys and press the ENT key on the numeric key pad Four display modes are now provided as follows Select replay format Display Graph Print Upload K147 Issue No 4 4 Operation 4 53 e Display Selection of the Display option F1 writes the data associated with the first location of the selected Data Log file to the display Location 1 of 20 AY28000 Previous Next 16 07 59 05 08 93 To display the data relating to all subsequent locations o Note Pad press the NEXT key f an out of range location is requested the instrument remains at the current e Datalog location and flashes an error message Number out of le oe aa range Previous displays data in the previous m Replay i a location Rep
26. in set up to a Threshold alarm the difference between the two alarm modes being that an operating band is specified and that an alarm is generated if the recorded pressure falls outside this limit either positive or negative To set up the alarm mode proceed as follows m Select Alarms F1 from the channel Set up menu by o Units ei dl pressing Menu Scroll followed by Alarms F1 o Option k dd m Select required alarm channel by pressing the a Resolution appropriate key e g 2 bar g F1 a Name Fil SE ss Select Alarm Channel 3 piel 2 bar g 1 bar A Process K147 Issue No 4 4 Operation 417 SET UP oo eo DOOD Units Channel Option Barometer Resolution Name Filter Protection Alarms Identity The alarm selection menu is then presented as follows Select type of alarm Threshold Band Enable Clear Select Band F2 A prompt for the Upper Band Limit is now given and the existing level is displayed e g Enter Upper Band Limit 1 8 Enter required Upper Band Limit e g 1 8 on the numeric key pad and press ENTER A prompt for the Lower Band Limit is then given e g Enter Lower Band Limit 1 5 m Enter the required Lower Band Limit e g 1 5 on the numeric key pad and press ENTER A prompt for required Bell indication is then given e g Bell indication On Off m Select On F1 or Off F2 as required A prompt for the required Electrical Output indication is
27. instrument for single pressure unit operation K147 Issue No 4 4 Operation 4 7 e Spec The instrument has the facility to enable the operator to set up a user defined conversion factor for the pressure reading the value being the number of Pascals in one user defined unit The default setting of the Pascals to Spec conversion is 100 scaling the pressure display in hPa By entering a conversion factor Pascals to Spec l unit factor under Set up the instrument can be made to read any required unit To change the default setting of the Special factor proceed as follows o Switch the instrument ON Units Channel Option Barometer gt gt o Press the SET UP key o0oooe o Select Units F1 from the Set up menu Pressure Spec l oc o Select Spec I F2 from the Default Units Selection menu The instrument now displays a prompt showing the cur rent conversion factor and requesting entry of a new factor Pascals to Spec Factor 100 00 o Enter the required conversion factor on the numeric key pad and press ENTER o Press EXIT MENU three times to exit set up o Assign a function key to Spec l refer to Pressure Section 4 3 1 NOTE f the Spec l conversion factor is changed while the Spec l Units factor is selected the Spec l Units factor will have to be re selected in order to make use of the new conversion factor K147 Issue No 4 4 8 DPI 145 User Manual
28. output facilities are mutually exclusive so only a Programmable Output or an Analogue Output can be generated at any one time i e not both simultaneously Generating of Output Voltages or Currents Prog Output e To generate an output voltage or current proceed as follows o Switch the instrument to On using the ON OFF switch o Units The electrical outputs from the instrument will default to o Channel Off o Option o Barometer gt gt e Output o Press the SET UP key and press Menu Scroll o Comms Print 2 eel o Select Output F1 Q Ana Output E Prog Output o Select Prog Output F2 sa o Select Voltage or Current as required e g Voltage F1 l Set o On o Off K147 Issue No 4 4 4 36 DPI 145 User Manual o Press the Set key F1 and enter the required output level either using the Up Down function keys F3 and F4 or by direct numerical value entry from the keyboard followed by ENTER B Connect the external load to the I V BNC Output socket located on the rear panel shown in Fig 4 3 m Set the output to On using the Om F3 key When the output is switched On the e g output voltage level is displayed B To disable the programmable output press the Off F4 key It should be noted that if the instrument is subsequently switched off while the Programmable Output is enabled when the instrument is next switched on the last analogue value set up will be retained but the o
29. period o Press Exit Menu three times to exit Set up or allow sufficient time for it to timeout K147 Issue No 4 4 6 DPI 145 User Manual 4 3 1 Set up Units e Pressure Instruments are supplied with their pressure scales programmed to specific function keys as follows bar F1 psi F2 mH20 F3 and kPa F4 U S version of the instrument default to psi F1 Hg20 2 inHg F3 and kPa F4 Japanese version default to kg em F1 mmHg F2 mH O F3 and mbar F4 To change any default setting proceed as follows o Switch the instrument ON Unit n Channel o Press the SET UP key If set enter the Set up PIN de and press ENTER Barometer gt gt ecd o Select Units F1 from the Set up menu o Select Pressure F1 from the Defaults Units Selection menu Operation of this key displays the full range of units available together with an indication of the units to which each function key is currently assigned Use function keys to select units bar kg m torr Pa F4 mmHg F3 atm hPa cmHg psi F2 kPa mHg lb ft MPa mmH O inHg mbar F1 cmH O inH O kg cm mH O inH 04 The default setting for any key is changed by pressing the required function key This causes it to scroll through the menu missing out units assigned to the other function keys The display shows the function key next to the assigned pressure unit Assigning three function keys to Blank provides the facility of setting up the
30. pressure zero and in response to the prompt Enter applied Pressure 1 K147 Issue No 4 5 Calibration 5 15 Enter the applied pressure measured on the pressure standard on the numeric key pad followed by ENTER Pressure Electrical Ratio gt gt gt M1 M2 External Resonant oogo Linearity TC 2 Point oeoo o Press the Accept F1 key to accept the entered pressure o Apply the highest pressure full scale and in response to the prompt Enter applied Pressure 2 Enter the applied pressure measured on the pressure standard on the numeric key pad followed by ENTER Press the Accept F1 key to accept the entered pressure The display briefly displays the following message Calculating Coefficients Please Wait before returning to the Pressure Cal Adjustment menu Check calibration at 25 and 75 full scale If calibration is out of specification a linearity compensation should be carried out refer to Section 5 6 e Auto Ranging Pair An auto ranging pair comprises two digitally compensated transducers covering the range 1 to 2 bar and 0 to 20 bar For calibration purposes the 0 to 20 barg transducer is allocated to Channel M1 and the 0 to 2 barg to channel M2 The following procedure details the method of carrying out a 2 point calibration of an auto ranging pair Pressure Electrical Ratio gt gt gt M1 M2 External Resonant DOmU Linearity TE
31. specification K147 Issue No 4 Contents ii 1 INTRO DICTO HE 1 1 1 1 Instrum nt Sp cifications aee dde sd dd paves d tendre tiled e davies 1 2 1 2 OPON DM 1 6 1 3 Associated PUbIICATIONSE rette neuro da ea ee e a eee en 1 7 2 FUNCTIONAL DESCRIPTION purre basses hance ence eda perdete cett 2 1 2 1 icc 2 1 2 2 FarniliaElSatiQnis iiio erect pete A E tpe EE Code adr 2 3 2 2 1 indicator Mode 2 6 2 2 2 Barometer ModE intime ie ce ace tl uote sh deu line Rd cases en 2 7 2 2 3 Sae PM 2 7 3 INSTALLATION RM 3 1 3 1 MOUNINO itcr haute qe xu ton ce aie e gne ep te 3 1 3 1 1 FRESE Standing t m 3 1 3 152 Rack MOUNTING cta rre ues dea staker 3 4 3 1 3 Panel MOUNU ooo anro inner ent ee 3 6 3 2 Connector Connection Sisal ne a oeaan stile diese disease peut ate ed 3 6 3 3 Pressure Connections save 3 7 3 4 Electrical Connections iei recente ere n endet coge desi dea e tenons 3 7 3 4 1 Power Supply Connections ssssssssssssssemeeeeeneen 3 8 3 5 Communication Interface ConneGtioS sesers naii 3 10 3 5 1 RS 222 Ine aan it a M 3 10 3 5 2 IEEE ASS Inte dO ennen EEEN EEEE 3 11 3 6 Connection of External Transducers ccccececccceceeeeeeceseeeeeteeeessseeesnseeeeeees 3 11 3 6 1 PIGZO RESISTIVE TYPES ipee nes cede masse ote oerte dudes des 3 12 3 6 2 RESONANT l ransd cer Types sms sue eie stor ete Ve PH VE Dun taa Ed 3 12 3 7 Switch Test and Analogue I V Output sss
32. to pressure measurement standard deadweight tester Apply lowest pressure zero and in response to the prompt Applied Pressure 1 Enter the applied pressure measured on the pressure standard on the numeric key pad followed by ENTER Press the Accept F1 key to accept the entered pressure In response to the following prompt Another Point Yes No K147 Issue No 4 5 Calibration 5 23 Enter the applied pressure measured on the pressure standard on the numeric key pad followed by ENTER o Select Yes F1 NOTE Aminimum of five points are required for a linearity calibration Typically 14 are used spread throughout the operating range of the transducer o Repeat the above procedure for as many pressures as required When the final pressure has been entered answer Mo F2 in response to the Another Point prompt Two messages will then be briefly displayed Transferring to EPROM digitally compensated types only Calculating Coefficients Please Wait On completion of the above the selected transducer is calibrated e Auto Ranging Pair An auto ranging pair comprises two digitally compensated transducers covering the range 1 to 2 bar and 0 to 20 bar For calibration purposes the 0 to 20 barg transducer is allocated to Channel M1 and the 1 to 2 barg to channel M2 The following procedure details the method of carrying out a 2 point calibration of an auto ranging pair K147 Issue No 4
33. 3 7 The bridge supply from the instrument is 5 V and the maximum current that can be drawn from the instrumentis 25 mA When energised from 5 V the bridge should have a full scale output in the range 15 to 100 mV EXT PDCR Conventional Bridge Transducer Connections 5 6 7 8 Bridge Supply ve Bridge Output ve Bridge Output ve Bridge Supply ve Additional Digitally Characterised Connections 5VD EEPROM Clock EEPROM Data AO Al OVD Temp Sense Diode ve Temp Sense Diode ve Figure 3 7 External Transducer Connections Piezo Resistive Types 3 6 2 Resonant Transducer Types Connections for resonant transducer types are shown in Fig 3 8 It should be noted that these connections are designed to interface with Druck RPT 200 style transducers made for this instrument EXT RPT Rear View OMONDOABRWN 10 11 12 AO Frequency signal OV Supply 5V A1 12V Diode ve Sense No connection 12V No connection OV EEPROM clock EEPROM data Figure 3 8 External Transducer Connections Resonant Types K147 Issue No 4 3 Installation 3 18 3 7 To connect an external transducer plug the connector into the appropriate socket Resonant sensors should be plugged into the socket labelled EXT RPT and Piezo Resistive sensors into the socket labelled EXT PDCR NOTE The external transducer input sockets although of the same pattern are electrically d
34. 5 8 DPI 145 User Manual 5 4 1 Selection of New PIN number Access to all the calibration and test routines are protected by a PIN number Initially on delivery PIN number 123 is installed The PIN number can be changed by the New Pin option of the user Cal Test menu To change a PIN number proceed as follows SET UP o Units o Channel o Output o Calendar Comms Printer Display Barometer 0000 Cal Status Cal Test 000 a Cal a Test m Cal Pin a Setup Pin gt gt gt gt o o Switch the instrument ON Press the SET UP key and enter the Setup Pin if set Press the Menu Scroll key twice to obtain the third page of Set up Option Select Cal Test from the Set up menu by pressing the F2 function key Enter the existing PIN number and press ENTER Select Cal Pin from the user Cal Test menu by pressing the F3 function key The instrument now prompts for a new PIN number a typical dialogue being shown below The numbers shown in brackets 27 represent keyboard entries made by the operator followed by operation of the ENTER key located on the numerical key pad Enter new PIN number lt 27 gt Max 8 numbers Enter on its own is no PIN On entry of the required PIN number the instrument requests verification of the new pin number prior to setting it Enter the required new Pin number in response to the following prompt Verify new PIN number lt 27 gt The Setup Pin can be cha
35. BARO key Following operation of this key the instrument will prompt as follows 1021 36 1032 44 Barometer Selection Display Units Process Barograph Use the function keys as follows to set up the required display K147 Issue No 4 4 Operation 4 21 e Display This function is used to select the barometer parameters to be displayed Select parameters as follows o Select the Display key F1 e Display o Units o Select required parameters e g QFE for display by 2 en pressing the appropriate function key F1 The instrument Gens prompts for the channel to be selected for display as a re follows e g a OFF sae a Trend Barometer channel On NOTE f the Barometer was already switched ON for display only the opposite state e g OFF will be displayed as a menu option o Trend is the change in QFE or OFF over the last 3 hour period and is updated every 10 minutes o Select On F1 to display the selected channel o Press Exit Menu to return to the Barometric Selection menu and select other parameters in a similar manner e Units Select Barometric units as follows o Select the Units key F2 Display Units x 4 Process o Selectrequired units If the required units are not indicated o Barograph use the Set up facility to select units required e g mbar bar refer to Section 4 3 1 psi mH O mbar ooeo wooo e Process Two b
36. Calibrating Programmable Output menu is displayed as follows Calibrating programmable output Volts Current m Voltage Calibration adjustment of the voltage output takes the form of measuring two output voltages across the V I OUT socket located in the rear panel of the instrument These two voltages are provided automatically by the instrument when the voltage function is selected The measured values are then entered via the key pad The calibration method is detailed in Section 5 8 K147 Issue No 4 5 Calibration 5 13 5 4 4 Current Calibration adjustment of the current output takes the form of measuring two output currents provided across the I V OUT socket located in the rear panel of the instrument These two currents are provided automatically by the instrument when the current output calibration function is selected The measured values are then entered via the key pad The calibration method is detailed in Section 5 8 Ratio Calibration Option The Ratio F3 option from the calibration adjustment menu provides the facility to set up the Ratio Reference within the instrument The Ratio Reference is used by the instrument for measuring the output from the internal and external PRT type transducers It is therefore important that the Ratio Reference is correctly set up prior to any calibration adjustment of the instrument s pressure ranges Normally the Ratio calibration should not require changing CAUT
37. ENTER THRESHOLD LEVEL OPEN F1 CLOSED F2 SELECT TRIGGER DIRECTION NEGATIVE F1 POSITIVE F2 Datalog Parameters File ID Continue Figure 4 2 Event Mode LATER F2 NOW F1 ENTER SELECT START TIME MANUAL HRS MIN SEC LOGGING MODE PRESS LOG F1 KEY PRESS STOP TO TERMINATE Logging Trigger Logon Summary Screen K147 Issue No 4 4 Operation 4 51 Data Log Parameters Logging Trigger Switch Test Open Stop 14 00 File ID CER11 Continue Data Log Parameters Logging Trigger Start at 16 00 Stop Single Shot File ID CER12 Continue Data Log Parameters Logging Trigger Threshold 10 2500 bar Stop Single Shot File ID CER13 Continue Example 1 After Continue F1 has been pressed will log every time the external switch contacts connected to the External Switch Socket open Logging Sequence is terminated by pressing the Stop F4 key Example 2 After Continue F1 has been pressed will perform a single shot logging operation at the programmed time 1600 A File Closed message is then displayed to indicate that the logging operation has terminated Example 3 After Continue F1 has been pressed will perform a single shot logging operation when the recorded pressure drops below 10 25 bar A File Closed message is then displayed to indicate that the logging operation
38. F2 in response to the Another Point prompt A summary screen is then presented as follows Slope 1 00045 Intercept 0 3456 mbar Accept Quit On completion of the above the existing calibration data for the selected resonant transducer is overwritten and the calibration complete K147 Issue No 4 5 Calibration 5 29 5 6 2 External Transducers e Fixed Range PRT and Digitally Compensated PRT s The following procedure details the method of carrying out a full linearity calibration for these types of transducer An external PRT transducer is fitted to the External measurement channel M3 To carry out a full linearity calibration on an external transducer proceed as follows o Plug the external transducer into the socket labelled PDCR o Units on the rear panel of the instrument o Channel o Option o Barometer gt gt Enter the Cal Adjustment menu as detailed in Section 5 4 2 o Output and select Pressure F1 o Comms 9 Eringer o Select External The status of the External input is now o External gt gt reported o Cal Status e Cal Test o Display M3 Enabled o Calendar Enable Disable m Cal 3 n Press the Enable F1 key to display the table of configured a Setup Pin External Transducers Pressure Electrical Ratio External Transducer M x M2 SN AY136720 SN Undefined External SN KP10031 SN Undefined Resonant SN 17667 SN Undefined Enable SN Unde
39. ION If the Ratio Calibration is changed all the existing instrument pressure range calibrations will be invalidated and will need to be repeated Linearity and TC The procedure takes the form of measuring the transducer supply nominally 5 Volts and measuring Span and Cal nominally 100 mV and entering these values via the numeric key pad K147 Issue No 4 5 CEN 5 14 DPI 145 User Manual 5 5 Correction of Zero and Full Scale Errors The procedure for the correction if zero and full scale errors depends upon the type s of transducer fitted to the instrument and upon whether the transducer to be corrected is internal or external to the instrument 5 5 1 Internal Transducers e Fixed Range PRT and Digitally Compensated PRT s The following procedure details the method of carrying out a two point Zero and Full Scale calibration for these types of transducer These transducers will be fitted to measurement channels M1 and M2 Note that if only one measurement channel is configured only one channel number will appear on the display Pressure Electrical Ratio Bbbb M1 M2 External Resonant oogo Linearity TC 2 Point oeoo Enter the Cal Adjustment menu as detailed in Section 5 4 2 and select Pressure F1 Select required channel M1 or M2 Select 2 Point F3 Connect the channel input to an external pressure source and pressure measurement standard deadweight tester Apply lowest
40. IONS TO THE REAR PANEL SWITCH THE INSTRUMENT OFF BEFORE REMOVING ANY COVERS ISOLATE THE INSTRUMENT FROM ALL ITS SUPPLIES 3 4 1 Power Supply Connections The instrument can be powered either from a c mains or from a d c supply Section 1 specification gives full details of the a c and d c power supply requirements e A C Power Supply The a c power supply inlet assembly is located on the rear panel as shown on Fig 3 5 A fuse and Power On Off switch are also contained within the assembly details of the fuse fitting being shown in Fig 3 5 Figure 3 5 A C Power Supply Socket To connect the a c power supply proceed as follows o Insert the moulded IEC connector 1 into the power supply socket 4 and connect to a suitable a c power source o Switch on the a c power supply and switch the instrument ON o Check that the display is lit up K147 Issue No 4 3 Installation 3 9 o If the instrument display does not light up isolate the external power supply and remove the IEC connector 1 from the power socket 4 o Remove the fuse holder 2 as shown in Fig 3 5 and insert a new fuse NOTE A spare fuse 3 is contained within the fuse holder 2 Refer to Section 6 for details of fuse o Replace the IEC connector 1 and switch on the power supply and the instrument Should the moulded on mains connector need to be removed from the cable assembly 1 for any reason the cable connection
41. If less than four temperature points are entered an error message will be displayed At least 4 points needed 5 8 Analogue and Programmable Output Adjustment The following details the method of calibrating these outputs e Voltage output SET UP Units Channel Option Barometer 0000 Output Comms Printer External 0000 Cal Status Cal Test Display Calendar 0 0e0 Cal Test Cal Pin Setup Pin DOOR Pressure Electrical Ratio DDD Volts Current ok ok ok PP gt o Enter the Cal Adjustment menu as detailed in Section 5 4 2 and select Electrical F2 Connect a BNC connector to the IM output socket located on the rear panel and connect a Digital Voltmeter to the connector Select Volts F1 The following prompt is displayed Output voltage 1 is Type the voltage recorded on the digital voltmeter on the numeric key pad and press ENTER The following prompt is now displayed Output voltage 2 is Type the voltage recorded on the digital voltmeter on the numeric key pad and press ENTER Voltage Ana Output calibration is now complete K147 Issue No 4 SET UP o Units o Channel o Option o Barometer o Output o Comms o Printer o External o Cal Status e Cal Test o Display o Calendar m Cal nu Test a Cal Pin a Setup Pin A Pressure A Electrical A Ratio Volts Current 5 Calibration gt gt
42. Menu or twice to quit Set up K147 Issue No 4 4 10 DPI 145 User Manual 4 3 3 Select Printer and Print Screen e Printer To select a printer proceed as follows o Switch the instrument to ON Units Channel Option o Press the SET UP key Barometer gt gt Output o Press MENU SCROLL to select the second page of the Comms set up menu Printer External gt gt 00006 0e 0 0 o Select Printer F2 from the Set up menu Q Previous a Next Selecting the Printer option F2 from the Set up menu provides a list of printers supported by the instrument Printer Selection Druck 40 column printer 80 column printer PreviousNext The currently selected printer is indicated by the position of the cursor arrow Use the Next F2 and Previous F1 keys to move the cursor arrows to the required printer Press the Exit Menu key to return to the Default Setting Menu e Print Screen To print the screen proceed as follows o Ensure that the external printer or computer is connected to the RS232 port and that the port is correctly configured See Section 4 3 2 o Press and hold the PRINT key for 1 second If the key is not held for long enough an error message is written to the display Keep key depressed to print screen K147 Issue No 4 4 Operation 4 11 4 3 4 Channel Display Functions e Resolution The display resolution can depending upon the range selected be set up to
43. NTER THRESHOLD LEVEL ENTER START TIME HRS MIN SEC OPEN F1 CLOSED F2 SELECT TRIGGER DIRECTION NEGATIVE F1 POSITIVE F2 Datalog Parameters Logging Trigger Summary Screen File ID Continue Quit Figure 4 1 Periodic Mode K147 Issue No 4 4 48 DPI 145 User Manual Example 1 Data Log Parameters Logging Trigger After Continue F1 M has been pressed will Periodic time e g 00 00 20 at 20 sec intervals from present time terminating at 14 00 Stop 14 00 File ID CERO1 Continue Example 2 After Continue F1 has been pressed will log at 30 sec intervals starting when pressure rises through 10 bar Stop after 20 samples have been taken Data Log Parameters Logging Trigger Threshold 10 0000 bar 20 samples File ID CERO2 Continue Example 3 After Continue F1 has been pressed will log at 30 sec intervals starting when switch contacts connected to the Switch Input first open Stop at 14 50 or following Stop command F4 Data Log Parameters Logging Trigger Switch Test Periodic timel Open 00 00 30 at 14 50 File ID CERO3 Continue Example 4 After Continue F1 Start at 14 30 Periodic time nas been pressed will log at 1 hourly intervals 01 00 00 commencing at 14 30 Stop after 12 Samples Data Log Parameters Logging Trigger Stop 12 Samples d nici GE following the Stop Continue
44. PI 145 User Manual 1 2 Options Option A IEEE 488 GPIB Digital Communications Bus Software to operate the IEEE 488 interface can be supplied at the time of purchase oras aretrofitted option The software is installed and enabled by the use of an one time electronic key The bus employs the SCPI protocol CAUTION For EMC compliance all IEEE leads must be less than 3M in length NOTE The IEEE 488 connector is always fitted but the IEEE software option must have been installed before the connector can be used Option B External Transducers Up to a maximum of ten external piezo resistor transducers and one external resonant transducer can be used with the DPI 145 The external transducers are specially made for this application and come complete with 2 metres of cable terminated with a 12 way plug for direct connection to the instrument Piezo resistive transducers are available to cover gauge absolute and differential applications and resonant transducers for absolute applications The following options are available Option B1 Provides normal Piezo resistive transducer temperature error bands Option B2 Provides enhanced temperature coefficients as detailed for internal sensors Option B3 Any transducer with calibration accuracy as found For any further details please refer to the manufacturer Option C Negative Calibration A channel fitted with a gauge or differential fixed range PR transducer can have an additio
45. Point and Level on the numerical keyboard and press ENTER To return to the lower limit if necessary press Accept F1 K147 Issue No 4 4 38 DPI 145 User Manual o Press Exit Menu and enable the analogue output by pressing the On F3 key The display will now indicate the analogue output mode e g Pressure gt Volts o Todisable the analogue output press the Off F4 or select another type of Analogue output Alternatively switch the instrument OFF and ON again The instrument is now programmed to provide an analogue voltage output proportional to the indicated pressure of the selected channel 4 9 Pressure Switch Testing The Switch Test function of the instrument allows the operating point of pressure switches to be accurately determined Switch Test is excluded from Barometer Mode To carry out a Switch Test operation proceed as follows o Ensure that the instrument is switched ON o Press the IND mode select key to ensure that the instrument is configured as an indicator o Connect the pressure switch to be tested to one of the measurement channels and an external pressure source o Connect the test lead into the BNC SWITCH TEST socket located on the rear of the instrument and connect to the pressure switch contacts o Press the SW key 2 Bar G 20 Bar G Process External 0 0e0 Reset K147 Issue No 4 4 Operation 4 39 o Select required pressure channel e g 20 bar
46. Select TC F1 The following menu is now displayed A Ratio a Temperature 1 0 00 v OK Cal Done Clear TC External Resonant o Enterthe first temperature in C and press ENTER Select e Linearity OK F1 and the following prompt is displayed e TC e 2 Point Enter Zero Pressure 1 bar o Apply the zero pressure and type its value on the numeric key pad and press ENTER The following prompt is now displayed Enter Zero Pressure 1 0 455 bar OK o Press OK F1 to accept the entered pressure o The instrument now prompts for a second full scale pressure as follows Enter FS Pressure 1 bar o Apply the full scale pressure and type its value on the numeric key pad and press ENTER The following display is now presented Enter FS Pressure 1 9 988 bar OK K147 Issue No 4 Ifo 5 32 DPI 145 User Manual Press OK F1 to accept the entered value The temperature calibration program now continues by requesting a second temperature to be entered together with the corresponding zero and full scale pressures Repeat the application of zero and full scale pressures for each of the operating temperatures throughout the required temperature range Sufficient time 2 hours must be allowed for the instrument transducer s temperature to stabilise between each set of pressure readings A minimum of four operating temperatures must be used On completion of temperature compensation press Cal Done F2
47. Sensing Druck DPI 145 Multi Function Pressure Indicator User Manual K147 i LICE Vu GD General Electric Company All rights reserved DPI 145 User Manual DPI 145 MULTI FUNCTION PRESSURE INDICATOR DPI 145 Multi Function Pressure Indicator Covers software versions 3 XX Druck Limited 1998 This document is the property of Druck Limited and may not either in part or whole be copied or otherwise reproduced communicated in any way to third parties nor stored in any Data Processing System without the express written authority of Druck Limited K147 Issue No 4 i DPI 145 User Manual SAFETY o The manufacturer has designed this equipment to be safe when operated using the procedures detailed in this manual Do not use this equipment for any other purpose than that stated o This publication contains operating and safety instructions that must be followed to ensure safe operation and to maintain the equipment in a safe condition The safety instructions are either warnings or cautions issued to protect the user and the equipment from injury or damage o Use qualified technicians and good engineering practice for all procedures in this publication Toxic Materials o There are no known toxic materials used in this equipment Maintenance o The equipment must be maintained using the manufacturer s procedures and should be carried out by authorized service agents or the manufacturer s
48. Spare Fuse On Off Switch Power Supply Assembly O1 ND Figure 6 1 Power Supply Fuse Replacement 6 3 K147 Issue No 4 i 6 4 DPI 145 User Manual 6 3 Cleaning Clean case with damp cloth and mild detergent 6 4 Memory and Clock Support Battery The instrument employs a long life battery to ensure that data is retained and the clock continues to operate when power is removed This battery has a life of 5 to 10 years and may never need to be replaced during the life of the instrument If the memory or clock fails to function correctly after several years of use the battery may need to be replaced The battery is not a user replaceable item The instrument should be returned to the manufacturer or service agent K147 Issue No 4 6 5 6 Maintenance 6 5 Approved Service Agents Find the authorized service agents and the manufacturer s service departments at www gesensing com K147 Issue No 4 i 6 6 DPI 145 User Manual K147 Issue No 4
49. a Name 2 BarG Process 2 P3 td Not Defined P4 Not Defined P5 Not Defined P6 Process Channel Protection Select On Off Use the Select F1 key to position the cursor over the required channel and press the On Off key F4 The Displayed legend against the selected channel will change to read Displayed Prot to indicate that the channel is now protected o Press Exit Menu three times to exit the Set up mode e Alarms One of two types of alarm function are provided for each measurement channel Threshold and Band For each type of alarm alarm annunciation can be either an internal bell or an external voltage current or both o Set up Threshold Alarm To set up a Threshold alarm proceed as follows m Select Alarms F1 from the channel Set up menu by S b eui pressing Menu Scroll followed by Alarms F1 o Option ge m Select required alarm channel by pressing the a Resolution appropriate key 2 bar g F1 a Name a Filter a Protection gt gt Select Alarm Channel m Alarms a Identity 2 bar g 1 bar A Process K147 Issue No 4 4 Operation 4 15 The alarm selection menu is then presented as follows Units Channel Select type of alarm Option Barometer 0 0e0 Threshold Band Enable Clear Resolution Name Filter m Select Threshold F1 A prompt for the threshold Protection 7 level is now given and the existing level is displayed DODD Alarms a Identity Enter Thres
50. able for the instrument covering piezo resistive silicon diaphragm resonant silicon diaphragm and resonant cylinder types Some of these are available as a digitally characterised auto ranging module others are available in internal and external mounting Whatever the fit of transducers the instrument has six Measuring Channels M1 to M6 to which three transduc ers RPT and three are for piezo resistive transducers PRT One of each of these types is reserved for external transducers i e the instrument has one external PRT channel and one external RPT channel In addition to the Measuring Channels the instrument can display up to six Process Channels P1 to P6 A Process Channel is a pseudo channel that does not carry raw measured data instead it carries either processed or math ematically derived data Figure 2 3 shows the concept MEASUREMENT CHANNELS EXTERNAL INTERNAL PROGRAMMABLE PROCESS CHANNELS M1 to M3 are PRT Channels M4 to M6 are RPT Channels P3 M1 M3 P2 M1 TARE Mees Se EE ENES EE e gt P1 M1 MAX TYPICAL ONLY CONFIGURED DISPLAY TYPICAL Figure 2 3 Measurement and Process Channel Display K147 Issue No 4 2 Functional Description 2 5 For example Measuring Channel 1 M1 may be configured in an instrument as a 2 bar g channel but Process Channel 2 P2 may carry a version of M1 which h
51. age or current User 0 to 30 mA O to 10 V 0 05 rdg 0 005 F S 1 digit Programmable Output Range As analogue output Accuracy Current 0 035 rdg plus 0 01 F S 1 digit Voltage 0 025 rdg plus 0 01 F S 1 digit Accuracies include a 90 day stability and calibration uncertainties Digital Communications RS232 serial data link using SCPI protocol Power Supply A C D C Power Consumption 80 to 260 V at 45 to 410 Hz 9 to 32 V d c 10 watts max Electrical Safety Meets BSEN61010 1 as applicable The instrument must be connected to the power supply protective earth when operated from a mains supply Safe for use up to 2 000 metres above sea level K147 Issue No 4 1 INTRODUCTION 1 5 Environmental Specification EMC This equipment meets the following EMC requirements EN50081 1 Emissions and EN50082 1 Immunity Temperature Operating 0 to 50 C Storage 20 to 70 C Sealing Front Panel IP54 Enclosure IP41 The user must provide a suitable protection in more severe environments Humidity To IEC 1010 80 up to 30 C decreasing to 50 at 40 C Shock amp Vibration Designed to meet IEC 1010 Weight Dependent on transducer fit typically 4 6kg Dimensions 110 mm high 290 mm wide 250 mm deep 3 U high when rack mounted Accessories The instrument is despatched with User Manual K147 Calibration Certificates Mains Lead K147 Issue No 4 1 6 D
52. al Transducers e Fixed Range PRT amp Digitally Compensated PRT s The following procedure details the method of carrying out a two point Zero and Full Scale calibration for these types of transducer An external PRT transducer is fitted to the External measurement channel M3 To carry out a 2 point correction on an external transducer proceed as follows o Plug the external transducer into the socket labelled EXT AP PDCR on the rear panel of the instrument ressure A Electrical ies o Enterthe Cal Adjustment menu as detailed in Section 5 4 2 and select Pressure F1 Qo M1 m M2 A a External o Select External F3 The status of the External input is as Resonant now reported o Linearity e DO M3 Enabled Enable Disable Press the Enable F1 key to display the table of configured External Transducers External Transducer SN AY136720 SN Undefined SN KP10031 SN Undefined SN 17667 SN Undefined SN Undefined SN Undefined SN Undefined SN Undefined Previous Delete Select K147 Issue No 4 5 Calibration 5 19 000 DEOD bbPbb Position the cursor against the serial number of the required transducer using the Previous F1 and Next F2 keys and press the Select F4 key If the external transducer s serial number is not contained in the directory proceed as outlined in Section 5 5 3 o Select 2 Point F3 1 2 o Connectthe external transducer to pressure measurement External stan
53. ar G Min P2 20 Bar G 20 BarG P3 Not defined P4 Not defined P5 Not defined P6 Select process to change units Select Reset Peak OK K147 Issue No 4 4 Operation 4 25 Select the required processing channel by positioning the reverse video cursor using the Select F1 key and pressing OK F4 Select the required units for the Process channel by pressing the appropriate function key The Select Units menu is then presented Select Units bar psi mH O mbar Depending on the Process other interactive functions may be written to the other function keys Reset Peak for Max 4 5 3 Set up a Channel Process Five Process functions are provided on the instrument Tare Peak F S Filter and Flow There functions can be applied to any measurement channel or any configured Process channel To define a process proceed as follows nD o Switch the instrument to ON o Display o B o Select Process from the Select Pressure Channel menu S S Only the ranges fitted to the instrument and Process if a e Process has been defined will be written to the screen a arg m 20 Barg Q Process o Select the required channel 20 bar g by pressing the appropriate function key The instrument responds by displaying the processes available Select processing function gt gt Max Min Tare F S The presence of the gt gt symbol indicates that further pages of process options are available These can be displayed by pressing
54. arometric process channels are provided Max and Min for the QFE and OFF parameters QFE is the local atmospheric pressure as measured at the transducer port QFF is the estimated equivalent Sea Level pressure calculated knowing measuring site altitude and local air temperature according to the UK meteorological office conversion formula K147 Issue No 4 4 22 DPI 145 User Manual Select process channels as follows o Select the Process from the Barometer Selection menu o Display o Units o Select QFE F1 or QFF F2 e g QFE F1 from Select e Process o Barograph Barometer Process menu m OFE P n OFF o Select Max F1 or Min F2 e g Max F1 A M o Select On F1 to enable Process to be displayed or PET OFF F2 to disable Process from being displayed n Off e Barograph The instrument is programmed to sample and record barometric pressure at hourly intervals Stored barometric pressures can then be plotted against time to obtain a barograph reading Up to 24 hours of data is stored After 24 hours of operation the early data is discarded at each new sample The barograph therefore shows a rolling 24 hour display To obtain a Barograph of either OFE or OFF proceed as follows o Press the BARO key to reveal Barometer selection menu Display Units Process Barograph o Select Barograph F4 e 000 o Select QFE F1 or QFF F2 as required After a short ie processing period th
55. as had atmospheric pressure added to it thus giving an absolute pressure reading Alternatively P2 could be programmed to carry a Tared reading or the Peak of M1 The processes available are Min Max Tare FS Percentage Full Scale and Flow The Process Channel concept is used again in the mathematical functions of the instrument If for example the instrument was programmed to subtract M1 from M2 say for a differential measurement then the result will be placed in a Process Channel Once a Process Channel has been loaded with data in this way it can be controlled for display and process purposes in the same manner as a Measuring Channel Any combination of Process or Measurement channels up to a maximum of eight at any one time may be displayed Four modes of operation are supplied as standard further modes can be purchased as options Indicator mode is a flexible general purpose pressure measurement mode whilst Barometer mode is aimed specifically at the requirements of atmospheric pressure measurement for meteorological applications Switch Test enabled by pressing the SW key allows easy and comprehensive testing of pressure switches Leak Test entered by pressing the Leak key allows pressure drop and leak rate to be measured over a programmable time interval K147 Issue No 4 2 6 DPI 145 User Manual 2 2 1 Indicator Mode This mode provides access to all the pressure transducers and all the processing and mathemat
56. ation In order that the instrument remains within the quoted accuracy it is suggested that Piezo Resistive transducers are checked every 90 days and Resonant transducers every 12 months The DPI 145 is a very precise measuring instrument and the test equipment and conditions of test must be suitable for the type of work and the test equipment and conditions of test must be suitable for the type of work A Class A compensated deadweight tester must be used The calibration check and calibration adjustment should be carried out in a controlled environment by a calibration technician The manufacturer offers a comprehensive and if required UKAS or NIST accredited calibration service A calibration technician must have the necessary technical knowledge documentation special test equipment and tools to carry out the calibration work on this equipment Calibration Check At the chosen calibration interval the instrument readings should be compared with a known pressure standard The recommended method starts at 0 increasing in 20 steps to 100 full scale and then decreasing in 20 steps to 0 Note any deviations between the instrument and the pressure standard and consider traceability accuracy to a National Standard If after a calibration check the results exceed the tolerance in the specification or other suitable performance standard carry out a calibration adjustment K147 Issue No 4 5 EN 5 2 DPI 145 Us
57. ation utilities are password protected and a factory set password 123 is entered into every instrument delivered Since misuse of the Set up and or the Cal Test facility of an instrument can result in the loss of its calibration it is recommended that a separate PIN number is set up for each in order to restrict unauthorised access To set anew PIN number proceed as follows SET UP o o o o o o o o ooeo DmMDOD Units Channel Option Barometer Output Comms Printer External Cal Status Cal Test Display Calendar Ca Test Cal Pin Set up Pin pue r o o Switch the instrument ON Press the SET UP key Enterthe set up PIN number 123 on the numeric key pad and press ENTER Press MENU SCROLL twice Select Cal Test F2 from the third page of Set up menu The instrument will now prompt for entry of the current password as follows Cal Test Enter Pin Number Enter PIN number 123 on the numeric key pad and press ENTER The instrument now displays the Cal Test menu Cal Test Menu Cal Test Cal Pin Set up Pin o Select Set up Pin F4 or Cal Pin F3 as required and a prompt is given for a new PIN number Enter Pin Number Enter key alone sets no Pin number o Enter a new PIN number via the numeric key pad and press ENTER o Atthe Verify new Pin number prompt enter the new PIN number via the numeric key pad and press ENTER f the new PIN nu
58. be aborted by operation of the Mo F4 key 4 11 2 Data Log Record Operations To carry out a Data Log Record operation proceed as follows STORE o o o e Deps Ooog o Note Pad Add Name Datalog Record Directory Delete Continue Quit Alpha T Alpha 4 ge M Periodic Event o Press the STORE key and select Datalog F4 from the menu Select Record F1 from the Datalog menu A prompt to Continue F1 with the Datalog function or to Quit F4 is now given e g Will log the current display 14 22 46 Continue Quit Press the Continue F1 key A file number is requested for the new Data Log file as follows Enter File ID Alpha Alpha gt K147 Issue No 4 4 46 DPI 145 User Manual This File number can either alphabetical numerical or a combination of both Alpha characters are entered using the Alpha T F1 Alpha J F2 F3 gt F4 keys Alpha 1 F1 scrolls forwards through the alphabet and Alpha F2 backwards Shifting right to the next character position or left to a previous character position is achieved by the F3 and F4 keys respectively Numeric entries are added directly from the numeric key pad The full alphanumeric text is added to the file by pressing the ENT key located on the numeric key pad o Following entry of the file number the instrument prompts for the selection of a trigger mode as follows Select trigger fo
59. ble DPI 145 Height difference used to calculate runway QFE R21 Barometer height used to calculate QNH Unlevel airfield Barometer height m asl R03 height m asl R21 height m asl Sea Level Figure 4 4 Calculation of Runway QFE amp QNH K147 Issue No 4 4 66 DPI 145 User Manual 4 14 1 Airfield Option Set up To set up the Airfield Option for operation proceed as follows SET UP Units Channel Option Barometer oeoo Aero Airfield DOS Oo Runways Temperature Site Channel D gt DD o Switch the instrument ON and press the SET UP key o Press the Option F3 key and select Airfield F2 from the Select Option menu This gives access to the Airfield set up options Four options are provided Runways F1 Temperature F2 Site F3 and Channel F4 Set up Measurement Channel On selection of F4 the instrument reports the channel currently being used as the Airfield Option sensor Airfield Channel 1 1 bar A Alter The change the measurement channel select Alter F1 and a menu showing the configured channels will be displayed 20 bar g 2 bar g Ext PRT 1 1 bar A Select the required measurement channel by pressing the relevant function key e Set up Site This option is used to enter the height of the Barometer Above Sea Level On selection of Site F3 the instrument reports the currently set barometer height and prompts for a new value to be
60. chieved by the F3 and F4 keys respectively Numeric entries are added directly from the numeric key pad The full alphanumeric text is accepted by pressing the ENTER key located on the numeric key pad The current screen together with the added note is then stored in the next available location Twenty Store locations are provided Configuration Store Operations In addition to the twenty store locations provided for screen displays six further locations are provided for the storage of mode configurations A mode configuration comprises the number of parameters set up for display on the screen If for instance two channels were set up for display under the Aeronautical Option storing this as a configuration would set up the instrument to display the same two channels when this configuration was recalled In any mode of operation to store a configuration proceed as follows o Set up the required channels for display under the appropriate Display option refer to sections 4 4 4 5 1 4 5 2 and 4 13 2 o Press the STORE key Note Pad is Pd o Select CONFIG F3 A listing of the currently stored onfig Datalog configurations is now presented C 2 IND 2 3 BARO 4 OPTION 4 5 OPTION 2 6 EMPTY Select Screen Configuration Store Select OK K147 Issue No 4 4 42 DPI 145 User Manual o Use the Select F1 key to position the reverse video cursor over an empty channel or over a channel to be overwritte
61. command F4 K147 Issue No 4 4 Operation 4 49 STORE DOOR e000 Dbbc Note Pad Add Name Datalog Record Directory Delete Continue Quit Periodic Event Switch Threshold B Event Mode The Event trigger mode is used where Data Log operations are to be triggered by external events Three basic event modes are provided Mow F1 Later F2 and Condition F3 A manual trigger facility is extended to the F1 function key by the Mow option and a Data Log operation is recorded every time the Log key F1 is pressed The function is exited by pressing the Stop F4 key A Single Shot timed operation is provided by the Later Option F2 and a Data Log operation is recorded at the programmed time The Condition option F3 allows the external event trigger to be selected from either a Switch F1 or Threshold F3 Switch F1 provides repetitive trigger action to the Data Logger and Threshold F3 an One Shot trigger i e the first time that a pre programmed threshold is exceeded in either a positive or a negative direction Figure 4 1 shows the sequence of parameter selection for the Event mode and Figure 4 2 typical summary screen displays K147 Issue No 4 4 50 DPI 145 User Manual SELECT EVENT SELECT DATA LOG START CONDITION F3 SWITCH F1 I THRESHOLD F3 SELECT SELECT SOURCE STATE OF OF THRESHOLD SWITCH TRIGGER PRESSURE F1
62. cond X axis the defined graphical function is drawn on the screen 24 hour Barograph 2 1000 bar 1 5661 17 00 00 30 NOW To define another type of graph press Exit IMlenu once and re specify the axes as required To exit the Recall mode press Exit Menu repeatedly until the main display is restored four times from displayed graph K147 Issue No 4 4 Operation 4 55 e Print Selection of the Print option causes all data associated with the selected replay file to be down loaded to a printer To make use of this option a printer must be connected to the RS232 interface The instrument software supports two types of printer a40 column portable printer and an 80 column printer The printer types are set up under the Set up facility The instrument automatically formats the output file for the type of printer in use To print a datalog file proceed as follows o Press RECALL and select Datalog F4 from the Select o Note Pad Replay Mode menu Datalog o Select Replay F1 from the Data Log menu vr When Replay is selected a directory showing the first CUM page of Datalogged files is displayed To replay a Data Log nes i file select the required file using the Page Up F1 and i Shay Page Down F2 1 F3 or 4 F4 cursor keys and press the ENTER key on the numeric key pad A Upload Four display modes are then provided these being termed Display F1 Graph F2 Print F3 and Upload F4
63. d res eie tert erbe tae aD Re Peas 5 3 5 2 2 Cal Status Menu ssssssssssssssssssseeeeeeee eene ener ene rennes 5 4 5 3 Transducer IDES P nn nee ae had seie seen ane nt ne el 5 5 5 3 1 ntem l PI zG RESISTIVE Types ie e pete e eps eiae nca 5 5 53 2 External Piezo Resistive Types rrnrrnrrrannrrnrnnnrrnnrnnnnnrnnnnnnnnnrrnnnnnnntnrnnnnnnn 5 6 5 3 3 Internal Resonant Types ssssssssssssssssseeee eene eene 5 6 5 3 4 External Resonant Types vert he duddnndesukgsultd aehheaieas 5 6 5 4 Using the Calibration IMIeTblz ice i E a a aaas 5 7 5 4 1 Selection of new P I N Number 5 8 5 4 2 Instrument Pressure Calibration Menu Option 5 9 5 4 3 Electrical Calibration Menu Options ssssssse 5 12 5 4 4 Ratio Calibration O DUON siente minde tested IE 5 13 5 5 Correction of Zero and Full Scale EmOrS sssrinin iaa 5 14 5 5 1 Internal Transduc rs xe or the cre eio there ab apie hine aaa ian 5 14 Fixed Range PRT and Digitally Compensated PRT s sssssss 5 14 Auto RANGING Par 2 coc restera anuo ode x ae PERS aeaa aaa dar ea 5 15 Resonant TransdUCSrS s arsine eer eet acta Ioa AREE Re ERA Eines 5 17 5 5 2 External Transducers ssssssssssssssssseseeeeeeeeeeee nennen 5 18 Fixed Range PRT and Digitally Compensated PRT s sssssss 5 18 RESONANT SENSO S s iso esae eite er alt ni mener detre 5 20 5 5 3 External Transducer Identification Entry PRT Types only
64. dard Resonant RE o Apply lowest pressure zero and in response to the prompt Isable Enter applied Pressure 1 Linearity TC Enter the applied pressure measured on the pressure sro standard on the numeric key pad followed by ENTER NOTE If a negative pressure is required effect this by applying a positive pressure to the transducers reference port Press the Accept F1 key to accept the entered pressure Apply the highest pressure full scale and in response to the prompt Enter applied Pressure 2 Enter the applied pressure measured on the pressure standard on the numeric key pad followed by ENTER Press the Accept F1 key to accept the entered pressure The display briefly displays the following message Calculating Coefficients Please Wait before returning to the Pressure Cal Adjustment menu K147 Issue No 4 Ifo 5 20 DPI 145 User Manual o Check calibration at 25 and 75 full scale If calibration is out of specification a linearity compensation should be carried out refer to Section 5 6 e Resonant Sensors A two point calibration is not usually carried out on external resonant sensors Linearity compensation is carried out as detailed in Section 5 6 5 5 3 External Transducer Identification Entry PRT Types only If the parameters of an external transducer are not entered in the External Transducer directory proceed as follows o Plug the external transducer into the socket labe
65. displayed as follows Calibration adjustment menu Pressure Electrical Ratio K147 Issue No 4 Ifo 5 10 DPI 145 User Manual The Pressure F1 option provides access to the pressure calibration adjustment routines of the instrument Initially all the configured channels will be displayed as follows e g Calibration adjustment menu M1 M2 External Resonant e Piezo Resistive Internal and External Transducers Channels M1 M2 and External apply to the internal M1 and M2 and external M3 Piezo resistive transducers Selection of either of these options permits one of three types of calibration adjustment to be carried out o 2 Point Correction Zero and Full Scale Correction This is a simple span and zero calibration adjustment Zero pressure and nominal full scale pressure are applied to the transducer to be adjusted the exact value of full scale pressure applied being typed in via the key pad This procedure leaves the linearity and temperature compensation data unchanged Refer to Section 5 5 for method o Linearity Compensation Used to provide linearity correction of the pressure reading A minimum of 5 points must be entered over the appropriate pressure range e g 1 to 2 bar The procedure takes the form of applying precisely known pressures and entering the pressures via the key pad Positive pressures are applied to the channel s pressure port and negative pressures are simulated by application of a posit
66. e other switch pole i e test both the normally open and normally closed contact sets For pressure switches with multiple contact sets repeat the test for each contact set o Press Exit Menu key to quit Switch Test Data Store Operations The Data Store facility which is operative in all instrument modes i e IND BARO and OPTION provides the facility to store a single screen and a mode configuration The Store Option also provides access to the Data Log facility Store Recall operations are described in Section 4 12 Screen Store Operations In any mode proceed as f Note Pad Add Name o00 Datalog Note Pad Add Name Datalog of operation i e IND BARO or OPTION to store a display screen ollows o Press the STORE key o Select Note Pad F1 to store screen in the next location without adding any supporting note or o Select Add Name F2 to first add supporting notes to screen to be stored On pressing F2 a prompt to enter text is displayed as follows Enter Text Alpha Alpha gt K147 Issue No 4 4 Operation 4 41 4 10 2 This test number can be either alphabetical numerical or a combination of both Alpha characters are entered using the Alpha T F1 Alpha J F2 F3 F4 keys Alpha 1 F1 scrolls forwards through the alphabet and Alpha F2 backwards Shifting right to the next character position or left to a previous character position is a
67. e a change if the transducer is replaced These transducers can be adjusted for zero and full scale The use of a dead weight tester having measured masses and correcting for temperature and gravity is mandatory for this level of calibration The work should be carried out in a controlled environment with adequate stabilisation time prior to and during adjustment K147 Issue No 4 5 Calibration 5 3 5 2 1 General Procedures The following general hints are provided as a guide to calibration procedures Do Use high quality Repeatable and Linear pressure sources and allow adequate stabilisation time before calibration minimum 1 hour Conduct the calibration in a temperature and preferably humidity controlled environment Use deadweight testers carefully and away from draughts Use only one deadweight piston to cover the whole of the operating range of any auto ranging pair Do Not Conduct linearity compensation unless a calibration check shows excessive non linearity Conduct temperature compensation unless sure of the reason why the compensation has changed Attempt to alter the Constants of an existing working resonant transducer Note The following routines require entry to the Set up and Cal Test menus Both menus can be PIN protected Initially PIN number 123 is set for both Set up and Cal Test WARNING Misuse of the CAL TEST facility can result in the complete loss of the instrument s calibration
68. e available in both the indicator and barometric modes Menu Icons In the following sections the menu driven operations of the instrument are supported by icons to show the structures associated with each command A typical icon is shown below together with a description SET UP First menu level system function e Units lt Sub menu level if option selected shown in blue o Channel o Option o Barometer gt gt menu Indicates presence of more functions on this level Press Menu Scroll to obtain next page of menu sub options o Output A i S Cins m Second page of Sub menu options o Printer o External gt gt lt menu Indicates presence of more functions on this level Press Menu Scroll to obtain next page of menu sub options o Cal Status e Cal Test Final Sub menu page shown selected o Display o Calendar gt gt lt Press Menu Scroll to return to first page of options o Cal o Test Options shown indicate all the options available under the option m Cal Pin em selected in block shown in blue above This Sub Sub option will also be a Setup Pin shown in blue K147 Issue No 4 2 2 DPI 145 User Manual The icon is divided into a number of blocks of four functions each corresponding to a function key as indicated By working down the icon from top to bottom the key sequence for the system function at the lowest level is obtained In this example the key sequence required in order
69. e barograph is plotted on the display QFF Og Barograph QFF 27 10 93 13 49 50 1021 37 porum mbar Pa 1016 16 1 Hours 24 o To return to the barometric display press Exit Menu three times If it is required to show store more than a 24 hour period or to sample at other than 1 hour intervals use the wider facilities of Datalog under the Store key K147 Issue No 4 4 Operation 423 4 5 Indicator Mode To select Indicator Mode or if operating as an indicator to display the indicator selection menu press the IND key The currently selected indicator channels together with the indicator selection menu will then be displayed INT FS 20 000 bar 2 bar G Process 3 1 1566 4 0481 Indicator Selection Display Units Process Maths 4 5 1 Select Channel for Display The following procedure indicates the method of selecting a particular channel for display ENTE o Switch the instrument to ON e Display o Units o Select Display F1 o Process o Maths spem o Select Pressure channel required from function keys n 20 Is Only the ranges fitted to the instrument and Process if a E bar g a process is defined will be written to the function keys Qa rocess o Select required channel 2 bar g by pressing the appropriate function key The instrument will then prompt for the selected channel to be enabled disabled for display as follows Transducer display On Use the appropriate key to enable o
70. eated pressing of the Previous key a Directory causes the instrument to step back one location each a Delete 2 1 time At the end of file the following is displayed I Display 4 Graph A Print 20 of 20 End AY 28000 4 Upload Previous Next 16 07 59 05 08 93 e Graph Selection of the Graph option F2 permits the operator to choose a graphical output of a selected data log file for display To select a graphical output proceed as follows o Press the RECALL key and select Datalog F4 from the o Note Pad Select Replay Mode menu s banks o Select Replay F1 from the Data Log menu S NAE When Replay is selected a directory showing the first a pM page of the Datalogged files is displayed To replay a Data Mica Log file select the required file using the Page Up F1 and Display Page Down F2 t F3 or 4 F4 cursor keys and press eom the ENTER key on the numeric key pad Upload Four display modes are then provided these being termed Display F1 Graph F2 Print F3 and Upload F4 K147 Issue No 4 4 54 DPI 145 User Manual o Select Graph F2 from Select Replay format menu and specify the X and Y axes for the required graph A typical dialogue follows Select graph y axis 2 BarG 20BarG Process2 Time Following selection of the Y axis parameter e g 2 bar g the instrument prompts for a corresponding X axis parameter Select graph x axis 2 BarG 20BarG Process Time After selection of the se
71. ection interface is shown in Table 1 The instrument is configured as Data Circuit Terminating Equipment DCE Instrument Function Pulled High Internally Pulled Hi Interna Equipment Connector e Cable 1 Chassis Shell Screen Table 1 RS232 Connections K147 Issue No 4 3 Installation 3 11 3 5 2 3 6 IEEE 488 Interface It should be noted that while the IEEE 488 connector is always fitted the operating software is a software option Ensure that the IEEE 488 software option has been installed before attempting to use the connector refer to Section 3 8 The Pin out of the connector is shown in Table 2 D105 DIOG DIO7 D108 REN GND GND GND GND GND GND Shield SIG GND Table 2 IEEE 488 Connections Details of the communication protocol used on the IEEE 488 interface are given in Druck Publication No K179 Connection of External Transducers External transducers ordered as instrument options are delivered terminated with a suitable connector for direct interfacing with the instrument Two types of external transducer may be used with the DPI 145 Piezo resistive types digitally and non digitally characterised and Resonant types Both types use the same type of connector but have differing pin allocations K147 Issue No 4 El 3 12 3 6 1 Piezo Resistive Types DPI 145 User Manual Connections for Piezo resistive transducer types are shown in Fig
72. ectors the pin out of the External RPT transducer connector is shown in Section 3 6 2 4 7 Leak Test To carry out a Leak Test with the instrument proceed as follows NOTE Leak Test is only available when the instrument is configured as an indicator o Press the IND mode select key e 2 Bar G s re o Select channel to be tested from Select Channel Menu o e g 2 bar g a Start a Wait o Select the Leak Test mode select key Four options will a uu now be displayed over the function keys Start F1 Wait F2 Time F3 and Reset F4 The dialogue line of the display will also show the function and the currently set Wait and Time parameters Leak Test Wait 90 sec Time 20 sec Start Wait Time Reset The display window is also re configured to show Pressure Drop Leak Rate 22 K147 Issue No 4 4 34 NOTE DPI 145 User Manual If required press the Wait function key F2 and enter the required wait period in seconds on the numeric keys followed by the ENTER key This parameter defines the delay period between the pressing of the Start key and commencement of the measurement period A period of 60 seconds minimum is recommended Set up the required test duration period by pressing the Time key and entering the required test duration period on the numeric keys followed by ENTER Apply the external pressure Press the Start F1 key The instrument displa
73. ectric strength flash testing should not be undertaken as permanent damage may be caused However routine testing to prove the Earth Continuity limited to 25 Amp test current for 5 seconds and Insulation Resistance 500V d c may be undertaken periodically at the user s discretion Do not use user replacement parts other than those supplied by the manufacturer or manufacturer s agent K147 Issue No 4 i 6 2 DPI 145 User Manual 6 2 Fuse Replacement If when an a c mains supply is connected to the instrument and the instrument fails to operate when it is switched on replace the power supply fuse as follows refer to Fig 6 1 o o Set the On Off switch 4 to OFF Isolate the external power supply and remove the IEC power connector 1 Remove the fuse carrier 2 from the power supply assembly 5 and replace the fuse NOTE A spare fuse 3 is carried in the fuse carrier It is essential that the correct type of fuse is fitted to the instrument Before fitting a replacement ensure that it is of the correct type HBC T500 Replace the fuse carrier 2 in the power supply inlet 5 Replace the IEC power connector 1 switch on the power supply and switch on the instrument If the fuse immediately blows on switch on contact the manufacturer or Service Agent DO NOT ATTEMPT ANY FURTHER SERVICING PROCEDURES K147 Issue No 4 6 Maintenance IEC Power Connector Fuse Carrier
74. ed Sea Level pressure accounting for local air temperature and three hour trend A barometer for use on an airfield requires further features including an alternative method of estimating Sea Level pressure e Runway OFE The instrument allows parameters to be entered and displayed for a maximum of six runways Each runway adopts the standard aeronautical designation indicating the bearing of the runway 03 is a runway at 030 when the same strip is used in the opposite direction it is named by the reciprocal bearing 210 so becomes 21 Additionally runways can be handed the display showing O3L and O3R The instrument calculates the Runway QFE by allowing for height difference between the runway threshold heights and the barometer height To do this the user enters the barometer height Above Sea Level the threshold height Above Sea Level and the local air temperature K147 Issue No 4 4 Operation 4 65 The OFE value is displayed in accordance with aeronautical practice that is rounded to whole millibars by rounding down This resolution is pre set and is not adjustable e Airfield ONH Airfield QNH is the estimated Sea Level pressure based on the local airfield measurement and using a formula which does not take account of air temperature The ONH is displayed in accordance with aeronautical practice that is rounded to whole millibars by rounding down This resolution is pre set and Is not adjusta
75. entered Barometer Height 100 m ASL Alter Press the Alter F1 key and enter the required height above Sea Level on the numeric key pad and press ENTER f the barometer is Below Sea Level enter a negative number K147 Issue No 4 4 Operation 4 67 e Set up Airfield Temperature This option is used to enter the local temperature of the Airfield On selection of Temperature F2 the instrument reports the currently set temperature A flashing cursor over the first digit of the current value prompts for a new value to be entered Airfield Temperature Eo C Enter the required value on the numeric key pad and press ENTER The instrument then returns to the Airfield set up display e Set up Runways Initially when the instrument is delivered no runways will be set up To set up the required runways proceed as follows o Select Runways F1 from the Airfield Set up menu A list of runways will now be reported Runway Height0 0 m ASL Not Used Runway Height0 0 m ASL Not Used Runway Height0 0 m ASL Not Used Runway Height0 0 m ASL Not Used Runway Height0 0 m ASL Not Used Runway Height0 0 m ASL Not Used Select Name Height In Use o Position the reverse video against an empty location initially all will be empty using the Select F1 key o Select Name F2 and enter the required runway number e g 27 If the runway is split to have left and right hand sections use the Righ
76. er Manual 5 2 Calibration Adjustment The instrument can be fitted with many types of transducers It is important to identify the transducer type before the calibration check to make sure the correct specification and adjustment procedure is used Refer to Section 5 2 2 for details of Cal Status checks The results of the calibration check should be studied to find the deviations to be adjusted If the instrument is operating correctly only zero and full scale calibration will vary Any excessive non linearity or temperature effects indicate a fault If there is non linearity with or without offset and gain errors then non linearity compensation adjustment is necessary If a temperature coefficient outside specification is found then temperature compensation might be attempted by the user However temperature performance drift is most unlikely In the unlikely event that this type of error is found it is most probably an indication of a damaged or failing transducer under these circumstances the instrument should be returned to a qualified service agent refer to Section 6 5 Frequency output transducers also termed resonant types such as Druck RPT and Solartron use a temperature and linearity compensation technique that requires the entry of constants for each individual transducer at the time when the transducer is installed These constants should NOT be adjusted during the life of the transducer They will only requir
77. fined SN Undefined o Disable SN Undefined SN Undefined o 9 Previous Next Delete Select o Position the cursor against the serial number of the required transducer using the Previous F1 and Next F2 keys and press the Select F4 key If the external transducer s serial number is not contained in the directory proceed as outlined in Section 5 5 3 K147 Issue No 4 5 30 DPI 145 User Manual o Connect the external transducer to an external pressure source and pressure measurement standard o Select Linearity F1 from the External pressure transducer Cal menu o Continue as described in Section 5 6 1 for Fixed Range PRT and digitally Compensated PRT s e Resonant Sensors External The DPI 145 instrumentis configured for a single external resonant transducer The method of linearity calibration is similar to that described for the Internal Resonant transducers differing only in the method of selecting the transducer To select the external RPT proceed as follows o Units o Plug the external RPT into the EXT RPT socket on Channel the rear panel of the instrument o Option o Barometer gt gt au o Determine the pressure operating range of the o Comms external transducer fitted o Printer E l nn e o Connect the External RPT input to an appropriate o Cal Status pressure source and pressure measurement e Cal Test o Display standard o Calendar m Cal o Enter the Cal adjustme
78. g The instrument responds with a flashing Switch Test indication and by displaying the current pressure and the status of the pressure switch contacts INT FS 20 000 bar Contacts Closed 1 Li Contacts Opened Switch Test Contacts Closed Start wf Ft j F2 F3 F4 Pi PES o Pressthe Start F1 key and slowly increase the external system pressure Continue until the switch contacts change state INT FS 20 000 bar Contacts Closed 5 1 771 4 use Contacts Opened 5 00198 sus Switch Test Contacts Open Reset kS F1 iu F2 F3 F4 M o Slowly decrease the applied pressure As the system pressure drops the indicator records the pressure at which the pressure switch contacts change state INT FS 20 000 bar Contacts Closed at 4 93162 7 4 E 91 1 32 galge Contacts Opened at 5 00198 7 Switch Test Contacts Closed Reset a ER a N J F2 F3 F4 K147 Issue No 4 4 40 4 10 4 10 1 o lfrequ DPI 145 User Manual ired on completion of test press the STORE button to give access to the STORE options in order to store data associated with the test The display will now show the hysteresis between the operating points of the pressure switch contacts o Press the Reset F1 to cancel the last test and set up another o Where a pressure switch has change over contacts repeat the test for th
79. ge of o Comms Set up Options o Printer o External gt gt o Select Cal Test F2 from the SET UP menu o Cal Status e Cal Test o Display The instrument will now prompt for the entry of a PIN number S External A typical prompt is shown below a Cal B P m NOTE If there is a long delay between the request a Setup Pin prompt and entry of the PIN number the display will time out and Set up will then need to be re selected Cal Test Enter pin Number Enter the correct PIN number and press ENTER Initially the instrument is supplied with PIN number 123 installed At the Enter Pin Number prompt enter the PIN number to gain access to the user Cal Test menu as follows User Cal Test Menu Cal Test Cal Pin Setup Pin F1 F2 F3 F4 These three options Cal F1 Test F2 and Cal Pin F3 provide access to the instrument s calibration Cal Test and selection of a new PIN number Cal Pin and Setup Pin routines If a Cal disabled Please remove Cal link message is displayed Link 2 on the main circuit board must be removed before proceeding To prevent accidental overwrite of calibration data Link 2 must be replaced on completion of calibration CAUTION It should be noted that the facilities under the Test F2 key are powerful fault finding aids Misuse of the facilities will cause serious damage to the instrument They should therefore only be used by trained service personnel K147 Issue No 4 i fo
80. give a maximum of 6 2 digits To select the required resolution proceed as follows SET UP o Units e Channel o o Option o Barometer o m Resolution a Name o n Filter a Protection x Alarms Switch the instrument ON Press the SET UP key Select Channel F2 from the Set up menu Select Resolution F1 option In response to the Select Pressure Channel prompt select the required channel by pressing the appropriate function key Note that both measurement and process channels can be selected Select Pressure Channel 2 Bar G 20 Bar G Process If Process is chosen a list of process channels will be written to the screen from which one channel must be selected 2 BarG Max P1 Displayed 2 BarG Process 1 P2 Displayed 2 BarG Process 2P3 Not Defined P4 Not Defined P5 Not Defined P6 Select process to set resolution Up Down Select Use the Up F1 and Down F2 keys to position the reverse video cursor over the required channel and press Select F4 The following prompt will then be given Pressure display resolution dp s 3 Up Down Use the Up F1 and Down F2 keys to set the required resolution Press Exit Menu to return to Select Pressure Channel menu and once more to quit Set up K147 Issue No 4 4 12 DPI 145 User Manual e Name Alpha numeric names can be added to each measurement and process channel To add change a channel name proceed as follows o Selec
81. given e g Electrical Indication Current Voltage None m Select the required electrical output indication Current F1 Voltage F2 or None Note that the Electrical Output level will be the same as the output set up under the Prog Output facility refer to Section 4 8 1 K147 Issue No 4 4 4 18 DPI 145 User Manual m Asummary screen of the Band parameters is now written Units to the display e g o e Channel o Option o Barometer Resolution Name Fiter Il EE EE EEE pe ye he nen Indication Protection gt gt dd Voltage Bell DOOD m Alarms Identity D OFF ee En m The Invert F1 option is used to reverse the alarm condition i e ON OFF and vice versa Change F2 allows the parameters to be re entered and OK causes the alarm to be set Quit F4 exits the alarm setting mode without changing setting any alarm parameters 4 3 5 Set up Barometer Parameters To set up the instrument s Barometric Parameters proceed as follows o Switch the instrument ON o Units Ch e Open o Press the Set up key e Barometer a Channel o Press Menu Scroll to select second page of Set up ue options Q Temperature o Select Barometer F4 from the set up menu Selecting Barometer from the set up menu provides a status report of the currently set Barometer parameters and the facility to change each one Channel 3 Height 100 0mTemp 20 0 C Channel Height Temperature
82. gt e Current output o 5 33 Enterthe Cal Adjustment menu as detailed in Section 5 4 2 and select Electrical F2 Connect a BNC connector to the I V output socket located on the rear panel and connect a Digital Ammeter to the connector Select Current F2 The following prompt is displayed Output current 2 is Type the current recorded on the digital ammeter on the numeric key pad and press ENTER The following prompt is now displayed Output current 2 is Type the voltage recorded on the digital voltmeter on the numeric key pad and press ENTER Current Prog Output calibration is now complete K147 Issue No 4 Ifo 5 34 DPI 145 User Manual K147 Issue No 4 6 Maintenance 6 1 6 1 MAINTENANCE There are no user serviceable parts on the DPI 145 instrument other than the power supply fuse Safety Instructions Observe the general safety procedures detailed at the beginning of this User Manual This instrument must only be serviced by a Druck approved service organisation Section 6 5 details a list of Druck subsidiaries worldwide Continuing Electrical Safety Assessment Electricity at Work Regulations A periodical inspection of the instrument to determine the continuing electrical safety may be undertaken at the user s discretion If the user decides that practical testing is required to determine the continuing electrical safety then due to the sensitive nature of the instrument diel
83. hold 1 8 m Enter required threshold level 1 8 the required centre of the alarm dead band on the numeric key pad and press ENTER A prompt for the hysteresis level that indicates the current status is then given Hysteresis 0 18 m Enter the required hysteresis level 0 18 on the numeric key pad and press ENTER A prompt for required bell indication is then given Bell indication On Off m Select On F1 or Off F2 as required A prompt for the required Electrical Output indication is given Electrical Indication Current Voltage None m Select the required electrical output indication Current F1 Voltage F2 or None Note that the Electrical Output level will be the same as the output set up under the Prog Output facility refer to Section 4 8 1 K147 Issue No 4 4 16 DPI 145 User Manual E A summary screen of the threshold parameters is now written to the display e g nits Channel Option Barometer o0ooeo Resolution Name Filter ON Indication l 1 98000 Dar 5 5 Protection gt gt Voltage oooo Bell Alarms Identity DN DEAD BAND 162000 bar fo Roco m The Invert F1 option is used to reverse the alarm condition i e ON OFF and vice versa Change F2 allows the parameters to be altered and OK causes the alarm to be set Quit F4 exits the alarm setting mode without changing setting any alarm parameters o Set up Band Alarm The Band alarm for a channel is similar
84. hould be carried out refer to Section 5 6 o Select channel M1 this selects the 20 bar transducer o Select 2 Point F3 M1 M2 E External o Apply lowest pressure zero and in response to the prompt Resonant Linearity Enter applied Pressure 1 TC ESAME Enter the applied pressure measured on the pressure standard on the numeric key pad followed by ENTER K147 Issue No 4 5 Calibration 5 17 o Press the Accept F1 key to accept the entered pressure o Apply the full scale pressure for the 20 bar transducer 20 barg and in response to the prompt Enter applied Pressure 2 Enter the applied pressure measured on the pressure standard on the numeric key pad followed by ENTER o Press the Accept F1 key to accept the entered pressure The display briefly displays the following message Calculating Coefficients Please Wait before returning to the Pressure Cal Adjustment menu o Check calibration at 25 5 barg and 75 15 barg of full scale If calibration is out of specification a linearity compensation should be carried out refer to Section 5 6 e Resonant Transducers A number of different types of resonant transducer may be fitted to the instrument Refer to Specification Section 1 A two point Zero and Full Scale calibration can be carried out on a resonant transducer Refer to Stage 3 in Section 5 6 1 K147 Issue No 4 E jo 5 18 DPI 145 User Manual 5 5 2 Extern
85. ibration 5 5 5 3 5 3 1 Transducer Types The instrument can be equipped with a wide range of transducer types which can be fitted internally and externally The following list details the types of transducer that can be fitted Internal Piezo Resistive Types The internal types of transducer fall into two distinct categories Piezo resistive and resonant Channels M1 and M2 are allocated to internal Piezo resistive types e Fixed Range Internal Piezo Resistive Transducers Description These devices comprise a silicon diaphragm Piezo resistive strain gauge with internal passive analogue temperature compensation They may be either gauge absolute or differential types They have a 50 mV full scale output when energised from a 5 Volt supply e Digitally Characterised Piezo Resistive Transducers Description These devices are Piezo resistive devices without passive temperature compensation Their temperature and linearity compensation characteristics are stored digitally within the transducer in an EEPROM e Digitally Characterised Auto Ranging Piezo Resistive Transducers An auto ranging pair comprises two digitally characterised transducers mounted on a manifold block together with a solenoid operated protection valve One transducer typically covers the lower 10 of the combined operating range and the other the complete operating range The instrument automatically selects the required transducer depending upon the magni
86. ical functions With Indicator mode enabled a total of eight values can be displayed All six Measuring Channels and all six Process Channels can be individually accessible The features of Indicator are Display Allows one or several of the measuring and process channels to be called onto the display The instrument automatically adjusts the display window and character sizes as more data is called onto the screen Units Allows the selection of one of four regular units to be applied to any channel The regular units can be chosen from an extensive list displayed under the Setup menu Process Allows the measured value to be modified by offsets such as Tare to be expressed as a Maximum or Minimum value or as a percentage of a nominated full scale A programmable filter gives steady readings when required without losing fast response to transients Maths This feature enables the user to enter simple mathematical relationships between any of the channels and display the result Constants can also be entered K147 Issue No 4 2 Functional Description 2 7 2 2 2 2 2 3 Barometer Mode This operational mode focuses the instrument onto the chosen barometric transducer The barometric transducer can be nominated under the Setup menu from any of the six Measuring Channels Data from the barometric transducer is shown as Local Pressure QFE and equivalent Sea Level Pressure QFF Three hour Pressure Trend can a
87. ifferent i e a Piezo Resistive device will not operate if plugged into the Resonant Sensor socket and similarly vice versa Secure the connector into the socket by tightening the connector securing Screws For information on the use of external transducers with the equipment refer to Section 4 6 1 Section 5 Calibration gives details of the calibration procedures for external transducers When a conventional PRT not Digitally Characterised is connected to the instrument for the first time the pressure reading will be shown on the display in units of voltage not pressure This is because the zero and full scale offsets of the transducer must be corrected by compensation before voltage can be interpolated as pressure Refer to Section 5 for compensation details Switch Test and Analogue I V Output Connections to the Switch Test and the I V Output sockets are made via coaxial BNC connectors To connect to either of these sockets plug a lead fitted with a BNC connector into the socket The Pin out of both sockets is shown in Fig 3 9 I V Output Switch Shel ve Shel Switch ve Centre ve Centre Switch ve 5V 200 ve Voltage CY 0 c Te uo or m External Current GND EXT A Switch Source Load GND o ma ve Current or Voltage Output Switch Test Input Figure 3 9 Switch Test and I V Output Socket Connections
88. ing many advanced measurement features including extensive linearization and thermal compensation of both the sensor and electronics the highest stability and precision of measurement is achieved The user can control the instrument via the high contrast display and keyboard or from a computer via the RS232 and IEEE 488 interfaces The instrumentation standard communication language SCPI is used reducing programming time and assisting interchangeability of instruments Many powerful features are built into the instrument allowing the measured pressure to be displayed in various ways Filters and offsets can be applied in addition to a wide range of measuring units Mathematical functions can be performed between channels and simple conversion formulae can easily be entered Additionally the instrument has specific modes of operation such as Barometer Airfield Barometer and Aeronautical Instrument Calibration In these modes the display format and facilities change in order to meet the specific requirements of these applications The instrument is also capable of generating electrical output voltages and currents These electrical outputs can be programmed to any level within the range of the instrument or be linearly related to any measurement or process channel output The unit can be powered either from an a c mains source or from a low voltage d c source K147 Issue No 4 1 2 1 1 DPI 145 User Manual Instrument Specifica
89. is used to set up the internal reference frequency of the instrument The procedure takes the form of measuring the reference frequency nominally 10 MHz to be found on the main printed circuit board connector PL14 pin 2 signal pin 3 ground and entering its value via the key pad m Diode The function is used to set up the measurement of the barometric transducer diode voltage output The procedure takes the form of measuring the actual diode voltage output from the barometric transducer and entering its value via the key pad The voltage with respect to OV may be found on test points V DIODE 1 M4 V DIODE 2 M5 and V DIODE 3 EXTERNAL K147 Issue No 4 5 EN 5 12 DPI 145 User Manual BSL Best Straight Line This function is used in the final stage of calibration of a resonant transducer to correct for any residual errors after the frequency and diode measurements have been completed A minimum of two and a maximum of six known pressures need to be applied and entered into the instrument The calibration method for resonant transducers is described in Sections 5 6 1 and 5 6 2 5 4 3 Electrical Calibration Menu Options Calibration procedures must be carried out in a controlled environment e g Standards Laboratory To gain access to the electrical calibration routines proceed as follows o Access the calibration adjustment menu as described in Section 5 4 2 o Select Electrical F2 fromthe menu and the
90. itially protrude through the block and the stepped end of the block should be to the front K147 Issue No 4 3 Installation 3 5 o Place an adaptor block into the recessed end of a side plate with the stepped end of the block facing towards the rack panel Slide the side plate adaptor block 3 5 along one of the side channels of the instrument until it locks into position o Fit the other side plate adaptor block 3 5 into the other side channel and lock into position o Tighten the M6 cap screw 8 on each side evenly against the back of the rack panel but do not over tighten o Refit the bottom panel 9 to the instrument o Fit the assembly into the cubicle rack and make the pressure and electrical connections as described in Sections 3 2 to 3 7 3 Figure 3 3 Rack Mounting Arrangement K147 Issue No 4 3 6 DPI 145 User Manual 3 1 3 Panel Mounting Figure 3 4 3 2 The method of mounting the instrument into a panel is similar to the method for mounting the instrument into a rack the instrument being mounted through the panel cut out rather than to the rack facia panel The panel cut out size is 284 mm x 106 mm Connector Connections All connections to the instrument are made to the rear panel Fig 3 4 shows a diagram of a typical rear panel layout together with the electrical pressure connections 49s Cs me Figure 3 4 DPI 145 Rear Panel K147 Is
91. ive pressure to the associated channel s Reference port Refer to Section 5 6 for method o Temperature Compensation Used to provide temperature compensation of the pressure reading The temperature compensation procedure takes the form of applying zero and nominal full scale pressure to the transducer to be compensated and entering the precise value of the nominal full scale pressure applied via the key pad This procedure is repeated at a minimum of four different temperatures over the temperature range of interest Refer to Section 5 7 for method K147 Issue No 4 5 Calibration 5 11 e Resonant Internal and External Transducer Selection of Resonant F4 from the Pressure Cal o Units adjustment menu displays all the configured resonant o Channel channels o Option o Barometer gt gt Select Resonant o Output C Pun M4 M5 External o External gt gt TE Selection of any of these options provides access to the e Cal Test calibration menu for the particular channel selected o Display or The four options are Gal m Constants a Test a Cal Pin a Setup Pin This function provides access to the calibration s Pressure constants of the barometric transducer The 2 E constants are derived at the time of manufacture of the transducer and should NEVER be altered in any Ns way without reference to the manufacturer External Resonant e M4 B Frequency o M5 o External i This function
92. l be displayed by default whether or not it has been switched ON under this utility o Select the Date F2 option Enter New Date Day Mth Year Enter the new date in Day Month and Year format via the numeric key pad using the decimal point as a delimiter o Press ENTER to accept the entered date K147 Issue No 4 4 Operation 4 5 e Display Parameters When the instrument is first supplied the display contrast and brightness are both preset To change the setting for either parameters proceed as follows o Switch the instrument ON o Units du o Press the SET UP key followed by the MENU SCROLL o Barometer gt gt key twice to obtain the third page of the Set up menu Pin s Cunt number will need to be entered first if set o Comms SE gt gt Select Display F3 from the Set up menu o Cal Staus o Select Contrast from the Display Set up menu Display a Calendar o Use the Up F1 and Down F2 keys to change the e g m Contrast Contrast level to the required level a Brightness nee o Press Exit Menu once to return to the Display Set up menu o Select Timeout F3 if required and enter required timeout period 1 to 500 min on the numeric key pad followed by ENTER o Press On F1 to enable or Off F2 to disable the Timeout feature At the end of the Timeout period the display backlight is turned off Pressing any key will immediately restore the display and reset the Timeout
93. lled EXT PDCR on the rear panel of the instrument A Pressure o Enter the Cal Adjustment menu as detailed in Section 5 4 2 re and select Pressure F1 atio A m o Select External The status of the External input is now m M2 reported Q External a Resonant M3 Enabled o Linearity Enable Disable o TC e 2 Point o Press the Enable F1 key to display the table of configured External Transducers External Transducer SN AY136720 SN Undefined SN KP10031 SN Undefined SN 17667 SN Undefined SN Undefined SN Undefined SN Undefined SN Undefined Previous Next Delete o Position the cursor at an Undefined location and press Select F4 If all locations are occupied one location will need to be deleted using the Delete F3 key K147 Issue No 4 5 Calibration 5 21 5 6 o Select FS Type SN F3 from the External Pressure Transducer Cal menu Select FS F1 and enter the full scale reading of the transducer on the numerical key pad and press ENTER Select Alter Type F2 and select the transducer type by pressing Absolute F1 Gauge F2 or Differential F3 Select Serial No F3 from the External Pressure Transducer Cal menu Enter the serial number of the transducer on the numeric key pad and press ENTER Press Exit Menu The external transducer parameters are now entered in the external transducer directory and this transducer is designated as the current device Linearity C
94. lso be displayed Option Additional Option modes will also focus on specific applications such as the Airfield Barometer mode and the Aeronautical Instrument Calibration mode K147 Issue No 4 2 8 DPI 145 User Manual K147 Issue No 4 3 Installation 3 1 3 INSTALLATION Safety Instruction THE INSTALLATION OF ELECTRICAL AND PNEUMATIC SUPPLIES MUST BE CARRIED OUT BY AN INSTALLATION TECHNICIAN An installation technician must have the necessary technical knowledge documentation special test equipment and tools to carry out the work on this equipment 3 1 Mounting There are three ways in which the instrument may be used o Free standing with or without carrying the handle o Ina 3U high standard 19 rack o Panel mounted The instrument which is supplied with its carrying handle fitted has no significant orientation sensitivity 3 1 1 Free Standing For the standing applications with the handle fitted the handle position can be moved by pressing the buttons located at each end of the handle and rotating the handle to the required position K147 Issue No 4 El 3 2 DPI 145 User Manual Removal of Carrying Handle For free standing applications not requiring the carrying handle to be fitted or in preparation for either rack or panel mounting the carrying handle can be removed as follows refer to Fig 3 1 Removal Replacement Figure 3 1 Carrying Handle Removal Removal
95. m 2BarG a 20 Bar G Reading n Process o Either press the Reading F1 key to set the currently n ax indicated value as the Tare value or enter the required Tare H RU value on the numeric key pad and press ENTER Note FS that any Tare value entered will be subtracted from the Reading indicated pressure reading Ifa Tare value requires adding to the indicated pressure reading a negative number should be entered K147 Issue No 4 4 Operation 407 F S The F S key is used to re configure the pressure display to read percent age of Full Scale rather than pressure units Following selection of a measurement channel or process channel from the Indicator Selection Menu select the F S function and proceed as follows Mo Select F S F4 key The F S display menu is now o Display displayed and will indicate current function status j Re ds o Maths 0 0 00000 FS 20 0000 bar 2BarG Reading a 20BarG ar o Set the required value for 0 either by pressing ENTER to accept the current value in the status line or Reading T Me F1 to enter the currently displayed pressure value as 0 x Tare Alternatively enter a numeric value on the key pad Lieu NN followed by ENTER O Reading o Settherequired value for 10096 either by pressing ENTER to accept the current value in the status line or Reading F1 to enter the currently displayed pressure value as 10096 Alternatively enter a n
96. mber is entered correctly the instrument responds with Verification OK and exits the Set up mode If the new PIN number is entered incorrectly at the Verify New Pin number prompt the instrument responds with Pin numbers do not agree and exits the Set up mode the old PIN number being retained CAUTION The instrument calibration can be lost by incorrect use of the calibrate facility K147 Issue No 4 4 4 DPI 145 User Manual e Instrument Clock Time and Date To set up the instrument Clock Time and Date proceed as follows SET UP Units Channel Option Barometer 00006 Output Comms Printer External 0000 Cal Status Cal Test Display Calendar eooo Time Date On Off Ooo gm gt gt gt gt o o Switch the instrument ON Press the SET UP key If set enter the Set up PIN and press ENTER Press MENU SCROLL twice to display the third page of the Set up menu Select Calendar F4 from the third page of the Set up menu Select Time option F1 and a prompt is given for a new time Enter new Time Hours Mins o Enter the new time in hours and minutes format via the numeric key pad using the decimal point as a delimiter o Press ENTER to accept the entered value o To select Time to be displayed press the On F3 key Conversely to remove time from the display press the Off F4 key NOTE If no channels are selected for display Time wil
97. n and press the OK F4 key The instrument now prompts for a name to be appended to the configuration Altitude Cal Airspeed 1277 feet 200 knots Name Store Alpha 1 Alpha I c gt This configuration file test can be either alphabetical numerical or a combination of both Alpha characters are entered using the Alpha T F1 Alpha V F2 F3 F4 keys Alpha 1 F1 scrolls forwards through the alphabet and Alpha F2 backwards Shifting right to the next character position or left to a previous character position is achieved by the F3 and F4 keys respectively K147 Issue No 4 4 Operation 4 43 4 11 Data Log The Data Log Function of the instrument enables it to store a large number of complete screens The function has two basic modes of operation Record and Replay The Data Log Function is available under the STORE facility in all modes of instrument operation i e IND BARO and OPTION To perform a Data Log operation proceed as follows o Switch the instrument ON o Note Pad o Add Name o Set up the instrument to display the required measurands o e Datalog y certam O Press the STORE key Selection of this function displays Eee the Select Note Pad or Data Log Menu as follows a Directory pee wj Select Note Pad or Data Log I Continue 5 Record Directory Delete Quit u Alpha o Toobtaina listing of the Data Log File names already used a Alphal press the Directory key F3
98. n of External Pressure Transducers 4 7 ECIAM Ims 4 8 Nous 4 8 1 Generating of Output Voltages or Currents Prog Output 4 8 2 Set an Analogue Output Proportional to an Indicated Measurand 4 9 Pressure SWITCH FGStIFIg nece stanti rero prier a papae dede e dE Tape ua REC AREE AER ER 4 10 Data Screen Store Operations 4 10 1 Screen Store Operations nessi 4 10 2 Configuration Store Operations 4 11 Data l O eL 4 11 1 Use of Data Log Directory and Delete Functions rrsrrrrrrrrrrvrrrnrrrrrnennn 4 11 2 Data Log Record Operations ra rote tl eee ba 4 11 3 Data Log Replay Operations ote veste cor e detenti cda e nede aga 4 12 Data store Recall Operations 4 12 1 Screen Recall Operations 4 12 2 Configuration Recall Operations sister tace te Deer ria 4 13 Software Options Aeronautical 4 13 1 Form of Test 4 13 2 OPS CAT OM E 4 13 3 Change Aeronautical Settings ssssssssssss 4 13 4 Rate ot Cimb Test osito adeo ed aede pe captam uod ten ae nanas 4 14 Software Options Airfield Barometer rmrrrrrnrrvrrrrrrrvrnrrrvnnrrrrrnrrrrnrerrnnnnrrrnnnnn 4 14 1 Airfield Option Set up 4 14 2 Change Airfield Setting usce cete tac ence ricis i dec eed ee Continued K147 Issue No 4 Contents V Contents Continued 5 CALIBRATIONE PT 5 1 5 1 Calibration Check sic res deett terr te v be ace rase ani din dettes 5 1 5 2 CalibratioriAd Ustenett nent terere tegi Ue te Co being tede sure ere 5 2 5 2 1 General Proee
99. nal calibration in the negative pressure direction K147 Issue No 4 1 INTRODUCTION 1 7 Option D Aeronautical This software option can be fitted at time of manufacturer or retrofitted by the user The software is installed and enabled by the use of a one time electronic key refer to Section 3 6 The manufacturer can advise on the optimum transducer types for use with this option The option is designed to enable the accurate calibration of Altimeters Rate of Climb and Air Speed indicators Option E Airfield Barometer This software option can be fitted at time of manufacture or retrofitted by the user The software is installed and enabled by the use of a one time electronic key The option is designed to extend the standard Meteorological Barometer features to those required for use as an Airfield Barometer Features such as QNH and multiple runways offsets are added to the existing QFE OFF and Trend displays Option F Rack Mount Kit A plate allowing the instrument to be mounted directly into a 19 inch rack occupying 3 U of rack height Option G Connectors The following mating connectors can be supplied Manufacturer s TM Order Code Function Description Supplier Part Number DPI 145 G4 D C Power Input yon Lemo 163 047 y 032 DPI 145 G1 External Trans Eres Lemo eden 003 DPI 145 G2 RS232 ai dus type Various Here IV Output amp DPI 145 G3 Switch Input BNC Various 163 048
100. nds with the following prompt Change Aeronautical Settings Display Units Timed ROC Select Display F1 to configure the instrument to read the required parameters refer to Section 4 13 3 or Select Units F2 to configure the instrument to display the required units refer to Section 4 13 3 Select Timed ROC F3 to enter the required rate integra tion period applicable to both rate calculation methods Switch on the controller Carry out the required test For Rate of Climb R O C tests refer to Section 4 13 4 K147 Issue No 4 4 Operation 4 61 4 13 3 Change Aeronautical Settings e Display The options in this menu are used to select the required Display parameters and Units To change the parameters proceed as follows m Display Units D Altitude Airspeed Mach ROC DEEE Ptotal Pstatic Qc Tared Alt DDD e Units o o Select Display F1 Select Altitude and press the On F1 key Note if the display is already on only the off function will be presented Repeat the selection process for each parameter by pressing the appropriate function keys Note that to obtain the second page of menu options the Menu Scroll key must be pressed After selection of the required display parameters press Exit Menu twice to quit the Display set up mode The options in this sub menu are used to set up the required Altitude Airspeed and Pressure units To set up these paramete
101. nged in a similar manner by selecting Setup Pin F4 instead of F3 K147 Issue No 4 5 Calibration 5 4 2 D9 The same PIN number is entered again and providing the verification PIN number agrees with the requested new PIN number the instrument accepts the new number giving the message Verification OK If the entered PIN number does not match the required new PIN number no new PIN number will be set and an error message is displayed as follows Pin number does not agree The instrument then exits from the SET UP mode Instrument Pressure Calibration Menu Option Calibration procedures must be carried out in a controlled environment e g Standards Laboratory To gain access to the pressure calibration routines proceed as follows SET UP Units Channel Option Barometer 0000 gt gt Output Comms Printer External 0000 gt gt Cal Status Cal Test Display Calendar o0ooeo Cal Test Cal Pin Setup Pin DDOON Pressure Electrical Ratio DEEE o o o Switch the instrument ON Press the SET UP key and enter the Setup Pin if set Press Menu Scroll twice to obtain the third page of Set up Option Select Cal Test F2 from the Set up menu Enter PIN number and press ENTER This will cause the calibration adjustment menu to be displayed Cal Test Cal Pin Setup Pin Select Cal Fl from the Cal Test Menu The Cal Adjustment Menu is then
102. nsducer At zero pressure change the pressure input to the positive port m Repeatthe above procedure for as many pressures as required When the final pressure has been entered answer Mo F2 in response to the Another Point prompt Two messages will then be briefly displayed Transferring to EPROM Digitally compensated types only Calculating Coefficients Please Wait On completion of the above the 2 bar transducer in the auto ranging pair is calibrated o 20 Bar Transducer m Select M1 F1 from the Pressure Cal adjustment menu and repeat the procedure previously described for the 2 bar transducer applying the same number of calibration pressures throughout the 0 to 20 bar pressure range 5 EEG K147 Issue No 4 5 26 DPI 145 User Manual e Resonant Transducers Internal A number of different types of resonant transducer may be fitted to the instrument Refer to specification Section 1 for details It is therefore essential to determine the type of resonant transducer s used in the instrument and its pressure operating range before carrying out any linearisation procedures This information is contained on the instrument s calibration certificate The pressure operating range is also indicated on the rear panel of the instrument above the channel input port To carry out a full calibration on an internally fitted resonant sensor proceed as follows SET UP o Units o Channel o Option o
103. nt menu as detailed in 2 o Section 5 4 2 and select Pressure F1 a Setup Pin x o Select Resonant F3 and select External channel Pressure i A Electrical M6 for calibration Ratio M1 A menu will now be displayed as follows M2 E l on Resonant 1 Cal menu V Constants Frequency Diode BSL e o M5 mE o External The Constants F1 optionis usedto enterthe transducer a constants at first calibration and should not normally be required for a recalibration o Proceed with Stages 1 to 3 as outlined for Resonant Transducers Internal Section 5 6 1 K147 Issue No 4 5 Calibration 5 31 5 7 Temperature Effects Compensation Temperature effects compensation is carried out on Internal and External PRT s only To carry out a temperature compensation run proceed as follows o Place the instrument if internal channels are being o Units compensated or the External transducer in a a grenna temperature controlled environment and allow time Spacer gt gt for the instrument transducer s temperature to stabilise at first calibration temperature o Output o Comms o Printer o Connectthe selected channel input to an external pressure o External gt gt source and pressure measurement standard deadweight o Cal Status tester e Cal Test So o Enterthe Cal Adjustment menu as detailed in Section 5 4 2 and select Pressure F1 m Cal EI o Select channel M1 M2 or External a New Pin tari o
104. nternal Piezo resistive transducers For external transducers pressure and temperature information will be contained on the their calibration certificate and its operating pressure will be engraved on its casing 5 3 3 Internal Resonant Types The internal types of resonant transducer fall into two distinct types vibrating cylinder Solartron and resonant silicon Druck Each type has a different operating frequency range 5 3 4 External Resonant Types The DPI 145 instrument accepts a single resonant transducer Each transducer is fitted with a plug to fit the EXT RPT socket located on the rear panel Channel M6 is allocated to external resonant transducers The calibration method is similar to the calibration method for the internal Resonant transducers If more than one external resonant transducer is used with the equipment it is important to check that the correct set of data has been loaded for the device to be tested BEFORE ANY WORK IS COMMENCED Check against the calibration certificate for the appropriate external device K147 Issue No 4 5 Calibration 5 7 5 4 Using the Calibration Menu The calibration routines are entered via an option of the SET UP facility Cal Test F4 To select the calibration mode proceed as follows o Switch the instrument ON o Units tg o Pressthe SET UP key and enter the Setup Pin if set o Barometer gt gt 5 Opi o Press Menu Scroll twice to obtain the third pa
105. o Airfield Altitude Airspeed ROC Filter gt gt o o o o Select SET UP and select Option F3 Select Aero F1 from Option Set up menu Select ROC Filter F3 from the channel Set up menu Select a channel for the filter e g 2 bar g The follow ingsub menu reports the currently set filter parameters The filter is permanently enabled Filter Average 7 Step 250ft K147 Issue No 4 4 64 SET UP o Units o Channel e Option o Barometer Aero Airfield ee om Altitude Airspeed ROC Filter Timed ROC DODD DPI 145 User Manual o The average figure includes the number of sequential readings averaged by the filter A number between 1 and 99 can be entered High values effectively give the filter a long time constant Enter the required number on the numeric key pad and press ENTER NOTE The default value is 7 The step figure indicates the value expressed in feet which if the filter sees a step increase in excess of this value the low pass characteristic is effectively bypassed Setting this to a high value has the effect of decreasing the step response of the filter Enter the required number on the numeric key pad press ENTER NOTE The default value is 250ft o The filter is permanently enabled 4 14 Software Options Airfield Barometer The standard instrument includes meteorological barometer facilities such as Barograph OFF Calculations estimat
106. o Ensure that the pressure to be monitored is not likely to exceed the operating range of the instrument refer to specification Section 1 3 If any doubt CHECK before connecting the instrument mS o Switch the instrument ON using the ON OFF switch located on the rear panel o Select the required channel for display refer to Section 4 5 1 o Select the required units for the channel refer to Section 4 5 2 o Before applying the external pressure vacuum zero the pressure display using the ZERO key K147 Issue No 4 4 30 DPI 145 User Manual o Apply the external pressure o Use the Process function to define any pressure processing which may be required refer to Section 4 6 3 o Use the PRINT and STORE Datalog options as required see Sections 4 3 3 and 4 10 4 6 1 Connection of External Pressure Transducers e External PRT s To connect an external PRT pressure transducer to the instrument proceed as follows o Plug the transducer into the appropriate External trans Output ducer socket Plug Piezo Resistive types into the socket Comms labelled EXT PRT Printer External o For Piezo Resistive type of External transducer select SET UP o Select External from the Select Pressure Channel menu If a non digitally characterised transducer is connected a table listing all external transducers en tered into the instrument s memory is displayed External Transducer SN AY136720 SN Undefined
107. ompensation The following procedures outline the method of carrying out a linearity compensation of the instrument s internal and external transducers Before any linearity compensation procedures are carried out perform a 2 point calibration on the relevant channel to determine whether or not a full linearity compensation needs to be carried out Two point calibration procedures are outlined in Section 5 5 K147 Issue No 4 Ifo 5 22 DPI 145 User Manual 5 6 1 Internal Transducers e Fixed Range PRT amp Digitally Compensated PRT s The following procedure details the method of carrying out a full linearity compensation for these types of internally fitted transducer These transducers will be fitted to measurement channels M1 and M2 Note that if only one measurement channel is fitted only M1 will appear on the display SET UP o Units o Channel o Option o Barometer o Output o Comms o Printer o External o Cal Status e Cal Test o Display o Calendar Cal Test Cal Pin Setup Pin Doom A Pressure Electrical Ratio M1 x M2 External Resonant e Linearity o TC o 2 Point o pes gt gt o Determine the pressure operating range of the transducer channel to be calibrated Enter the Cal Adjustment menu as detailed in Section 5 4 2 and select Pressure F1 Select required channel M 1 or M2 Select Linearity F1 Connect the channel input
108. perations until the Set up option clears K147 Issue No 4 4 Operation 4 9 Parity o Units le This option allows the RS232 parity checking mode to be o Barometer gt gt set up Three options are available Odd F1 Even F2 and la Dub None F3 put e Comms ne Select the required option by pressing the appropriate tH function key m RS232 o IEEE Q Baud rate m Parity Q Handshake Handshake o Units o Channel Selection of this option allows the RS232 handshaking o option l gt mode to be set up Four options are available None F1 Rm Software F2 Hardware F3 and Both F4 o Output e Comms o Printer Select the required option by pressing the appropriate ESSI function key m RS232 g IEEE nu Baudrate a Parity m Handshake B IEEE 488 Set up ER Selecting IEEE from the COMMS menu only if IEEE 488 o Units option is enabled displays the currently set instrument ts address and using a flashing cursor requests entry of a o Barometer gt gt new address for the instrument o Output e Comms IEEE address 4 o Printer o External T Enter the required instrument address on the numeric key de pad a number within the range O to 30 and press ENTER f an out of range number is entered the instrument displays an error message number out of range and retains the original address Press Exit Menu once only to return to the Set up
109. phere degrees Celsius degrees Fahrenheit common centimetre squared continued direct current digital multimeter device under test enter full scale feet not connected kilogram Pascal Least Significant Digit personal identification number metres milli Amperes milli metres number Piezo Resistive pressure pressure transmitter reading serial data transmission standard Standard Communication Protocol for Programmable Instrumentation tare vacuum K147 Issue No 4 1 INTRODUCTION 1 1 1 INTRODUCTION The DPI 145 is a high precision pressure instrument designed to operate as a general purpose indicator and barometer The instrument is designed for general laboratory use and is available in either free standing or rack mounting form In its role as an indicator up to six measuring channels are provided The customer can choose from a range of pressure transducers mounted within the instrument or connected externally The instrument can accommodate Druck piezo resistive transducers offering measurement over a wide pressure range and compatibility with a wide range of fluids In addition Druck micro machined resonant sensors can be employed for high stability low pressure measurements The Solartron 7881 resonant cylinder transducer is also available for this purpose Where the greatest precision over a wide range of pressures is required an auto ranging pair of piezo resistive transducers can be fitted Us
110. r Data Logging Periodic Event EB Periodic Mode The Periodic trigger mode F1 is basically an internally Not Pad generated trigger mode which permits the Data Logger to o Add Name be controlled either by programmable times or by the Dat log number of samples taken The frequency of sampling in m seconds is first of all defined followed by a required Stop ence condition The Stop condition can be either a a Directory programmable future time or after a programmable number B Delete of samples If Samples F2 are selected as the Stop 0 Continue condition then the Data Logger can also be programmed F to start either immediately now at a future period in time A Quit later or following any one of anumber of external events Il Periodic Condition Event The function associated with the periodic Trigger Mode are 1 described in Section 3 Figure 4 1 shows the sequence of Switch parameter selection for the Periodic Mode and Figure 4 2 typical summary screen displays K147 Issue No 4 4 Operation AAT SELECT PERIODIC ENTER PERIOD HRS MIN SEC SELECT STOP EVENT STOP TIME F1 SAMPLES F2 ENTER ENTER STOP TIME NUMBER HRS MIN SEC SAMPLES SELECT START EVENT LATER F2 NOW F1 CONDITION F3 SWITCH F1 I THRESHOLD F3 i SELECT SELECT SOURCE STATE OF OF THRESHOLD SWITCH TRIGGER PRESSURE F1 E
111. r disable the channel display NOTE f the channel was switched off only the opposite state e g ON will appear on the Transducer display for selection If the channel is selected a further menu showing the processes configured is written to the display from which a single process channel must be selected K147 Issue No 4 4 24 DPI 145 User Manual LED P1 Displayed 2 Bar G Min P2 20 Bar G 2 BarG P3 P4 P5 P6 Display processing channel Select Reset Peak On Off The currently selected channel is highlighted by a reverse video cursor Select the required processing channel using the select key and enable disable the selected channel using the On Off key F4 Depending on the process other interactive functions may be written to the function keys e g Reset Peak for Max 4 5 2 Change Channel Units To change the units of any configured measurement channel proceed as follows mm o Switch the instrument to ON o Display yc o Select Units F2 o Process o Maths rer o Select Pressure channel required 70 bar g by a 20barg pressing the appropriate function key The units B 70 barg selection menu is then presented n Process Select Units bar psi mH O mbar o Select the required units from the Select Units menu o f Process is selected a further menu showing the processes configured is written to the display from which a single process channel must be selected 2 Bar G Max P1 Displayed 2 B
112. rs proceed as follows Display Units mo Altitude Airspeed Pressure e E Feet Metres o o Select Units F2 Select Altitude and use the Feet F1 or Metres F2 to select the required units Repeat the selection process for Airspeed F2 and Pressure F3 It should be noted that selecting Pressure F3 provides a choice of the default units i e bar F1 psi F2 mH O F3 and mbar F4 If the units required are not displayed refer to Section 4 3 1 K147 Issue No 4 4 62 DPI 145 User Manual 4 13 4 Rate of Climb Tests To carry out Rate of Climb ROC tests proceed as follows o Connect the device under test and the DPI 145 instrument e AERO to the pressure source controller see Figure 4 3 o Airfield Display Check all pressure connections Using the Change a Pia ROC Aeronautical Settings Menu Select Display F1 followed a by ROC F4 and On F1 The display will now indicate Wee Rate of Climb Airspeed Mach Ptotal Pstatic 1 ROC On 1006 32 mbar 800 66 mbar Rate of Climb Qc Pressure O mal 208 66 ms o Switch on the external controller and generate a Rate of Climb The Rate of Climb display will provide a dynamic indication of ROC To obtain a Rate of Climb indication over a timed period proceed as follows o Press the OPTION key A third sub menu Timed ROC e AERO will appear on the change aeronautical settings menu o
113. s ENTER O Stage 2 m Select Diode F3 from the Resonant Cal Menu The currently entered diode voltage is displayed and a flashing cursor prompts for the entry of a new frequency Diode voltage 0 58011V m Measure the diode voltage between OV ve and test point V diode 1 ve for channel M4 or V diode 2 ve for channel M5 or V diode 3 ve for External resonant transducers channel M6 Enter the measured voltage on the numeric key pad and press ENTER 5 EE K147 Issue No 4 5 28 DPI 145 User Manual O Stage 3 m Select BSL F4 from the Resonant Cal menu m Apply lowest calibration pressure e g 800 mbar and in response to the prompt Applied Pressure 1 Enter the applied pressure measured on the pressure standard on the numeric key pad followed by ENTER m Press the Accept F1 key to accept the entered pressure B In response to the following prompt Another Point Yes No Select Yes F1 and enter the applied pressure measured on the pressure standard on the numeric key pad followed by ENTER NOTE Two pressure points may be used for zero and full scale correction Typically if 5 points are used spread throughout the operating range of the selected resonant transducer then the residual non linearity should be further reduced A maximum of six points can be entered m Repeatthe above procedure for as many pressures as required When the final pressure has been entered answer No
114. s are Blue Neutral Brown Live Green Yellow Protective Earth e D C Power Supply The d c input connector is located on the rear panel in the position shown on Fig 3 5 To connect the input proceed as follows 1 Supply ve 2 Supply ve 3 Make no Connection Figure 3 6 D C Power Supply Connector Pin Out K147 Issue No 4 Ife 3 10 DPI 145 User Manual o Insert the d c power supply connector and switch on the supply NOTE The d c supply can be connected whilst the a c mains supply is connected without risk of damage However if the instrument is to be run from the a c supply only then the dc supply should be isolated Torun the instrument from the d c supply only connect the d c supply and disconnect or switch off the a c mains supply The rear panel on off switch only controls the a c mains input 3 5 Communication Interface Connections Both the RS232 and IEEE 488 interfaces are connected using polarised plugs To connect up the interfaces push the appropriate connectors into the relevant sockets and tighten up the securing screws The RS232 is fitted as standard while IEEE 488 is a software option The communication protocol used on the IEEE 488 and RS232 interfaces is given in Druck Publication No K179 3 5 1 RS232 Interface The pin connections for the 9 pin RS232 connector and the relationship between the instrument and the RS232 control signals together with device interconn
115. service departments Technical Advice o For technical advice contact the manufacturer or subsidiary A qualified technician must have the necessary technical knowledge documentation special test equipment and tools to carry out the required work on this equipment Pressure Safety o Do not allow pressures greater than the Safe Working Pressure to be applied to the instrument refer to the Specification section of this manual Toxic Materials o During normal operation it is not possible for the user to come into contact with any hazardous substance which might be employed in the construction of the instrument The use of hazardous materials in the construction of this instrument has been minimised Care should however be exercised during maintenance and the disposal of certain parts Memory Back up Supply Uses a battery containing Lithium completely sealed within the instrument The battery can only be replaced by the Druck Service Department or an accredited Druck service Agent On the instrument this symbol indicates that the user should refer to the User Manual Potentially hazardous operations are indicated in the text by means of a hazard warning triangle Specific warnings relating to each section of the manual are given at the beginning of that section This product meets the essential protection requirements of the relevant EEC directives Further details of applied standards may be found in the product
116. ssssssssses 3 13 3 8 Installation of Software Options sssssssssssssseeeeeeeennes 3 14 4 OPERATION HE 4 1 4 1 Gengral EEE RE at neonate 4 1 4 1 1 MENU GONS REEL LOTO 4 1 4 2 Preparation for Operation passet e ete dt ea rd e ted 4 2 4 3 istrument Se Rup RE 4 2 First Time Operation Setup or Cal Pin mrrrrnrrvrrrrrrrvrrrrrvrrrrrrnnrrrnnn 4 3 Instrument Clock Time and Date ssssssssssss 4 4 Display PararetefSoue i te nad cot ee abd teu ee bte A Ht os 4 5 4 3 1 Seem 4 6 4 3 2 Set up Data Communications sssini iaa a 4 8 BISPE PES 1U M MD CREE 4 8 IEEE 488 Set Up cu sie ui teo sale dez qo det Ha pai e edad 4 9 4 3 3 Select Printer and Print Screen ssssssssssssssssse 4 10 Continued K147 Issue No 4 IV DPI 145 User Manual Contents Continued 4 3 4 Channel Display F hetioris u cci tert deir tae Pee gb t de 4 11 Resolution Name EG ER Protection PE LA Seienn o r a a E a fan dede td dare ta esset 4 3 5 Set up Barometer Parameters CRANES ER 110 1 ER TRE ditt KE eevee Knorr 4 4 Use Instrument as Barometer Bio A C ance T Process sis Barograph 4 5 Indicator ModE Tm 4 5 1 Select Channel for Display 4 5 2 Change Channel Units 4 5 3 Set up a Channel Process 4 5 4 Use of the Maths Function 4 6 Measurmda Pr ssur anses amemenenannestmeebinte ede cd nantes 4 6 1 Connectio
117. status and requests the selection of either On or Off e g Q Name z SM ur Filter Off Average 3 Step PT 0 05 F S On Off A 2 Barg 1barA Process o Theaverage figure includes the number of sequential readings averaged by the filter A number between 1 and 99 can be entered High values effectively give the filter a long time constant Enter the required number on the numeric key pad and press ENTER NOTE The default value is 3 o Thestep figure indicates the value expressed as a percentage of full scale which if the filter sees a step increase in excess of this value the low pass characteristic is effectively bypassed Setting this to a high value has the effect of decreasing the step response of the filter Enter the required number on the numeric key pad press ENTER NOTE The default value is 0 0596 o Enable or disable the filter using the On F1 or Off F2 keys When the filter is enabled a low pass filter symbol appears in the display against the selected channel K147 Issue No 4 4 14 DPI 145 User Manual e Protection The protection function is used to prevent a process channel from being overwritten To set up the protection function proceed as follows o Select Protection F4 from the channel Set up menu o Units The following sub menu will then be presented e Channel o Option z o Barometer 2 BarG Max P1 Displayed Ta 2 BarG Process 1 P2 Displayed Q Resolution
118. sue No 4 3 Installation 3 7 3 3 Pressure Connections Pressure Safety Instructions PRESSURE BEFORE DISCONNECTING OR CONNECTING THE PRESSURE LINES PROCEED WITH CARE TURN OFF THE SOURCE PRESSURE AND VENT THE ONLY USE EQUIPMENT WITH THE CORRECT PRESSURE RATING e Connection To connect up to a measuring port proceed as follows o Ensure that the pressure supply is isolated from the supply line It is recommended that an isolation valve be fitted between the pressure source and the instrument o Fitthe pressure supply line to the correct measuring port fitting a bonded seal between the pressure union and the measuring port All measuring ports use a G sthread Ensure that the couplingis tight and check for leaks Use the Leak Test facility if required refer to Section 4 7 NOTE The Barometric pressure sensors have a limited operating and calibration range refer to Section 1 Specification 3 4 Electrical Connections e Electrical Safety Instructions N USE THE CORRECT SUPPLY SETTINGS OPERATING VOLTAGE RANGES ARE MARKED ON THE REAR PANEL OF THE INSTRUMENT AND ARE GIVEN IN SECTION 1 SPECIFICATION WHEN THE INSTRUMENT IS POWERED FROM LOW VOLTAGE D C ENSURE THAT THE CORRECT VOLTAGE AND POLARITY ARE APPLIED TO THE INSTRUMENT THE EARTH LEAD COLOURED GREEN YELLOW MUST BE CONNECTED TO THE MAINS SAFETY EARTH K147 Issue No 4 1 3 8 DPI 145 User Manual BEFORE MAKING ANY ELECTRICAL CONNECT
119. switch on the power supply The instrument is now ready for connection and operation Connection details are given in Section 3 2 to 3 7 Figure 3 2 Handle Assembly TE K147 Issue No 4 3 1 2 DPI 145 User Manual Rack Mounting Figure 3 3 To convert the DPI 145 instrument for rack mounting a rack mounting kit is required This comprises a 3U high 19 standard rack mounting facia panel with a Suitable cut out for the instrument and two M6 Cap Screws To install the instrument into standard rack form proceed as follows o Ifthe instrument has been previously installed first isolate and disconnect all power supplies o Isolate all pressure supply lines and disconnect all pressure inlets outlets to the instrument o Remove any electrical connectors which may be fitted to the instrument e g external transducers RS232 or IEEE 488 connectors or Switch Test and IV Output leads o If fitted remove the carrying handle as described in Section 3 1 1 o Remove the carrying handle from the adaptor blocks 5 by unscrewing the two countersunk socket head screws 6 as shown in Fig 3 2 o Remove the four screws 10 securing the lower cover of the instrument 9 and remove the cover Refer to Fig 3 3 o Slide the instrument rear first through the rack front panel 7 as shown in Fig 3 3 o Fita M6 cap screw 6 into each adaptor block 5 and partially screw into the block NOTE No screw thread should in
120. t Left key to select the correct identification if not press the Accept key Press Accept F3 to store the required runway data o Ensure that the cursor is over the required runway and select Height F3 The instrument prompts for a new Runway Height New Runway Height Enter the required Runway Height in metres Above Sea Level e g 89 and press ENTER If the runway is Below Sea Level enter a negative number K147 Issue No 4 4 68 DPI 145 User Manual The current settings are now displayed Runway Runway Runway Runway Runway Runway Select O9L Height 89 0 m ASL Not Used Height 0 0 m ASL Not Used Height 0 0 m ASL Not Used e en Height 0 0 m ASL Not Used um Height 0 0 m ASL Not Used Height 0 0 m ASL Not Used Name Height In Use When runway is Not Used display of data for this runway is inhibited To select the runway as available for display press the In Use Key F4 NOTE The function of the In Use key is reallocated to Not Used Refer to paragraph 4 14 2 for details of how to display runway data 4 14 2 Change Airfield Settings e Display The Options in this menu are used to select the required Display parameters and Units To change the parameters proceed as follows OPTION Aero Airfield ooeo Display Units Ooog QNH RWY 27L RWY O9L RWY 27R DDD o o Press the OPTION key and select Airfield F2 Select Display F1
121. t Name F2 from the channel Set up menu The o Units following sub menu will then be presented e Channel o Option o Barometer Select Channel to add Name Q Resolution m Name 2 bar g 1 bar A Process n Filter Q Protection o Selectthe appropriate channel e g 1 bar A F2 The text entry sub menu will now be presented e g Enter text Alpha Alphal gt Alpha characters are entered using the Alpha T F1 Alpha F2 F3 and F4 keys Alpha 1 F1 scrolls forwards through the alphabet and Alpha I F2 backwards Shifting right to the next character position or left to a previous character position is achieved by the F4 and e F3 keys respectively Numeric entries are added directly from the numeric key pad Pressing the ENTER key located on the numeric key pad accepts the name K147 Issue No 4 4 Operation 4 13 e Filter A low pass filter is provided for each measurement channel The filter has a variable time constant and a variable step response The variable step response effectively overrides the filter operation when incremental pressure transients exceed a preset threshold step value To set up the filter parameters proceed as follows o Select Filter F3 from the channel Set up menu o Units e Channel j x o Option o Selecta channel for the filter e g 2 bar g The following o Barometer gt gt sub menu reports the currently set filter parameters and a Resolution
122. t up menu select Aero The display will now indicate the status of the Altitude Static channel and the Airspeed Oc channel Altitude Channel 4 Airspeed Channel 1 Altitude Airspeed ROC filter Timed ROC Select either Altitude F1 or Airspeed F2 and select the appropriate transducer for that channel 2 bard for Airspeed and 1 bara for Altitude Select ROC Filter F3 to set up the Rate of Climb filter parameters Refer to Section 4 13 4 Select Timed ROC F4 to enter the required method for Rate of Climb calculations Two methods are provided Mean and Timed Mean provides a method of constantly averaging over the operator selected time period Timed takes a snapshot of the altitude at the beginning and end of the time period and averages between these two points Press EXIT three times to quit Set up K147 Issue No 4 4 4 60 DPI 145 User Manual The instrument is now ready for operation A typical operational procedure is as follows OPTION e Aero o Airfield Display Units Timed ROC Altitude Airspeed Mach ROC DDD Ptotal Pstatic Qc Tared Alt bDbbb o Connect device under test and the DPI 145 instrument to the pressure source controller see Figure 4 3 Check pressure connections Switch on the instrument and press the OPTION key The instrument now responds with the following prompt Select Option Aero Airfield Timed ROC Select Aero F1 The instrument now respo
123. the Menu Scroll key NOTE f any of the following functions are enabled they will remain enabled after the instrument is switched off and on again K147 Issue No 4 4 26 DPI 145 User Manual Max The Max function causes the maximum value measured in the selected channel or process to be displayed Following selection of a measurement channel or process proceed as follows n gt o Select Max F1 from Select Processing function menu 5 Bled The Process is automatically added to the next free chan o Units nel and enabled for display If all process channels are T occupied an error message is displayed Arad No free channels available a Process ras To free a process channel use the Display option to turn A Min off a channel no longer required This channel will then be 5 Dem overwritten by the Process function Min The Min function causes the minimum value measured in a selected channel or process to be displayed The function is selected in a similar manner to that described for Max Tare The Tare function permits a programmable offset to be either subtracted from or added to the indicated pressure reading Following selection of a measurement channel or process channel e g 2 bar g to enter the Tare function proceed as follows mn o Press Tare F3 key A menu showing the status of the o Display Tare process is now displayed o Units E Pressure Tare Value 1 45000 bar
124. tion Internal Measuring Channels The instrument performance is determined by the sensor s fitted internally and externally See Option B for External Transducer performance Pressure Ranges Fixed Range Piezo Resistive Sensors PRT Sensors can be fitted giving full scale values within the following limits Gauge 70 mbar to 70 bar Sealed Gauge 71 to 350 bar Absolute 350 mbar to 350 bar Differential 175 mbar to 70 bar Auto Ranging Piezo Resistive Sensors Discrete ranges gauge only Gauge 1 to 20 bar Resonant Sensors All resonant sensors are absolute types and cover the following discrete ranges Druck Resonant Pressure Transducer RPT Absolute 35 to 1300 mbar 35 to 2620 mbar 35 to 3500 mbar 800 to 1150 mbar barometric Solartron 7881 Absolute 35 to 1300 mbar 35 to 2600 mbar 35 to 3500 mbar 800 to 1150 mbar barometric Maximum Safe Working Pressure 1 5 x F S up to a maximum working pressure of 385 bar at 350 bar 1 1 x F S No shift in calibration is caused by pressures to these values K147 Issue No 4 1 INTRODUCTION Measuring Accuracy 1 3 Assuming regular zeroing positive direction performance unless otherwise stated All values 1 digit Piezo Resistive Sensors Fixed Range PRT Linearity Hysteresis amp Repeatability gt 20 F S 0 05 rdg O to 100 mbar lt 20 F S 0 01 F S 101 mbar to 70 Bar gt 20 F S 0 025 rdg lt 20 F S 0 005 F S Above 70 Bar
125. to change the instrument s PIN number i e SET UP Menu Scroll Cal Test F2 Cal Pin F3 4 2 Preparation for Operation Normally the DPI 145 instrument is a c mains powered Additionally it can be powered from an external d c source supply input ranges are detailed in Section 1 When the instrument is being powered from an a c source the instrument provides an auxiliary d c output e Switching ON and OFF The instrument is switched ON using an ON OFF switch located on the rear panel of the instrument The ON OFF switch is an integral part of the a c power connector and the mains supply fuse is also housed within the connector After switch on a short initiation period follows during which the electronic control system is reset and the electrical outputs are switched off When the instrument display is ON the instrument is ready for operation If no Measurement or Process channels are selected for display clock time will be displayed together with a status message There are no channels selected 4 3 Instrument Set up The instrument is supplied calibrated A number of other parameters are also factory set as follows e Time Set to U K local time e Date Set to current date e DisplayTimeout Disabled off e Display Resolution Set to maximum all channels e Initial PIN Number Set as 123 K147 Issue No 4 4 Operation 4 3 e First Time Operation Set Set up or Cal PIN Access to the Set up and calibr
126. to the F1 and F2 keys respectively provide a means of scrolling forward to the next page or back to a previous page of a directory listing The Exit Menu key is used to return to the main Data Log menu When first entering the Data Log functions it is good practice to interrogate the directory This will enable the operator to determine what file ID numbers have already been used since an attempt to use an existing file ID number to record a Data Log operation will result in the display of an error message File already exists e Delete This Data Log function enables files to be detected from o Note Pad the Data Log memory Selection of the function provides o Add Name a directory listing and four cursor keys Page Up F1 Page Down F2 T F3 and J FA o e Datalog a Record Qa a Directory m Delete A Yes 4 No K147 Issue No 4 4 Operation 4 45 File ID Data Log Free Blocks 10846 28 01 93 15 37 10 28 01 93 15 40 30 28 01 93 15 43 16 28 01 93 15 49 32 28 01 93 15 58 29 Page Down T The Page Up and Page Down keys are used to select the appropriate directory page and the T J keys to select the file on the page To delete this selected file position the cursor against the file name and press the ENTER key on the numeric key pad A warning is displayed as follows Delete Are you sure Yes No This file is deleted on subsequent operation of the Yes F3 key or the Delete operation can
127. tude of the pressure currently being measured The calibration routines for all types of internal and external transducer whether fixed range or digitally compensated types are similar and are described in the following sections If the transducers are digitally compensated devices the compensation data contained within the transducers EEPROM will be over written with the new calibration data Standard fixed range devices have their calibration table data contained within the instrument overwritten K147 Issue No 4 Ifo 5 6 DPI 145 User Manual It is important when calibrating a transducer to determine its operating pressure and temperature range For internally mounted transducers this information will be contained on the instrument s calibration certificate The operating pressure is also indicated on the rear panel of the instrument above the pressure inlet 5 3 2 External Piezo Resistive Types External types of Piezo resistive transducer can be either fixed range types or digitally compensated types or a combination of both Each type of transducer is fitted with a special plug to fit the EXT PDCR socket located on the rear panel Channel M3 External is allocated to external Piezo resistive transducers The data appropriate to each type is stored in the instrument s memory and can be selected from a directory containing up to six separate devices refer to Sections 3 5 3 and 3 6 2 The calibration method is similar to the i
128. umeric value on the key pad followed by ENTER Flow The Flow function is used to convert a pressure reading to a flow rate Following selection of a measurement channel or process channel from the Indicator Selection menu the Flow function is selected as follows inn o Press the Menu Scroll key to reveal the second page of D the Select Processing function menu nits Process aths o Press the Flow F1 key 2 Bar G 20 Bar G Note The flow calculation used is a square root function n oeoo oo ax in Tare FS HA Flow K147 Issue No 4 4 98 DPI 145 User Manual 4 5 4 Use of the Maths Function The Maths function permits the measurand of any channel or Process selected for display to be mathematically related to any other selected channel or process Mathematical operators available for use are Add Subtract Multiply and Divide The process of setting up a Maths function is menu driven the sequence being as follows ENTE o Select the Maths function o Display 9 ie o Select first term of mathematic expression select Chan o rocess e Maths nel or Process o 2BarG a 20BarG o Select the required mathematical operator m Process o Select second term of mathematical expression select Channel or Process A a o Place the result in one of the Process Channels x 2BarG x 20BarG x Process A typical mathematical set up sequence is as
129. utput will be switched off To enable the output again repeat the above procedure K147 Issue No 4 4 Operation 4 37 4 8 2 Set Analogue Output Proportional to an Indicated Measurand To set up the instrument to provide an analogue output proportional to an indicated measurand proceed as follows o Switch the instrument ON using the On Off switch Any Suge analogue output previously defined will default to OFF o Channel 2 Option iss Press the SET UP key and press Menu Scroll eee o Select Output F3 o Printer Externa o Select Ana Output F1 Q Ana Output E Prog Output o Select Pressure Channel e g 2 bar g F1 4 2barg EVE o Select required type of output e g Voltage F1 I Voltage Current o A set up prompt will now be displayed Set j n Analogue output Volts Off Set On Off o To define the linear relationship between the selected measurand e g Pressure and Analogue Output e g Volts press the Set F1 key A prompt for the lower point of the relationship will be displayed together with the last parameter levels which were set up Lower Point 0 0000 bar 0 000V o Enterthe required level for each parameter e g Lower Point and Level on the numeric keyboard and press ENTER Press the Accept F1 key and a prompt for the upper point will appear e g Upper Point 2 0000 bar 5 0000 V o Enterthe required level for each parameter e g Upper
130. y will now indicate Leak Test Running and start the countdown of the Wait period indicated by the Wait period display counting down to zero After termination of the Wait period the Time display commences a countdown from the set period to zero The measuring time of the Test period is indicated by the display counting down to zero At the end of the Test period the display will indicate Pressure Drop and Leak Rate in the currently selected units If required press the STORE key to gain access to the STORE options in order to store the current display information If a printer is connected to the instrument the current display can be printed by operation of the PRINT key Press the Reset key F4 to clear the display in readiness for another leak test If while setting up the instrument the display times out indicated by the disappearance of the legends over the function keys press the Leak Test key again to reactivate the function keys K147 Issue No 4 4 Operation 4 35 4 8 4 8 1 I V Output The electrical outputs of the DPI 145 are taken from the BNC I V socket located on the rear panel There are two basic options available for the electrical outputs e Programmable Output Direct output of a user defined output voltage or current e Analogue Output Output of a voltage or current proportional to a selected measurement channel or process Full Scale F S and zero output levels can be defined The

Druck DPI 145 Multi-Function Pressure Indicator User Manual K147

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