Omega Vehicle Security DP97 User's Manual
Contents
1. If using comms port 2 type TM C 2 After the introduction screen the MAIN MENU will appear refer to MAIN MENU diagram Note 1 These instructions are included in the software as the text file and can be Viewed or printed out as required Note 2 Prior to despatch the DP97 and PC software should be enabled for normal operation In the unlikely event of a communications problem between the two items please perform the following procedure With all set up actions completed the Main Menu on the PC screen press the SPAN e key on the DP97 whilst simultaneously clicking on the enable button on the Main Menu To check click the Query button and the status box should confirm enabled Normal operation can now be carried out Note 3 To prevent corrections being programmed into the DP97 click on disable Button See Note 2 to re enable Page 12 SRi A BorAandB i corrections See Note 2 Page 11 He Click to find out current status of DEAT JH Click to Exit J programme See Note 3 Page 11 Page 13 13 7 F ie Click to retum Click to Indicates letter key to main manu clear value used with ALT if not using mouse Menu Structure Main Menu Read Instrument Write to Instrument Clear the PC memory Disable Query Enable Correct A B A B Files Drive amp Directory Load Save Print Return to main menu Edit Moving around keys Clear Return to main menu Page 142. The DP97 Digital Thermometer utilises highly advanced microprocessor circuit design to achieve exceptional measuring accuracy linearisation conformity and stability in a versatile but easy to use configuration Based on a high resolution 20 Bit Analogue to Digital Converter all measurement computations are performed digitally without drift The 5 digit LED display provides a readout to 0 01 C over the entire 199 99 to 849 99 C range alternatively F Kelvin or Ohms values can be displayed up to 999 99 units Single or dual Pt100 3 or 4 wire sensors are accepted the DP97 will automatically recognise and select 3 or 4 wire mode Display of input A B OR a B differential can be selected a differential zero function allows sensor accuracy differences to be eliminated for accurate differential readings An RS232 interface remote control and measure is fitted as standard and isolation is incorporated An analogue retransmission output is also fitted as standard the 1V dc output is programmable between lower and upper set limits Calibrated sensors can have their calibration points programmed into the DP97 via a personal computer using Labfacility software The instrument then digitally self calibrates to the probe s providing corrected temperature readout to give optimum system accuracy The non volatile memory ensures permanent retention of the values until the user wishes to re programme using the software preventing un
3. Basic Component under 10 CFR 21 NCR used in or with any nuclear installation or activity or 2 in medical applications or used on humans Should any Product s be used in or with any nuclear installation or activity medical application used on humans or misused in any way OMEGA assumes no responsibility as set forth in our basic WARRANTY DISCLAIMER language and additionally purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product s in such a manner RETURN REQUEST INQUIRIES Direct all warranty and repair requests inquiries to the OMEGA Customer Service Department BEFORE RETURNING ANY PRODUCT S TO OMEGA PURCHASER MUST OBTAIN AN AUTHORISED RETURN AR NUMBER FROM OMEGA S CUSTOMER SERVICE DEPARTMENT IN ORDER TO AVOID PROCESSING DELAYS The assigned AR number should then be marked on the outside of the return package and on any correspondence The purchaser is responsible for shipping charges freight insurance and proper packaging to prevent breakage in transit FOR WARRANTY RETURNS please have FOR NON WARRANTY REPAIRS consult OMEGA the following information available BEFORE for current repair charges Have the following contacting OMEGA information available BEFORE contacting OMEGA 1 Purchase Order number under which 1 Purchase Order number to cover the COST of the product was PURCHASED the repair 2 Model and serial number of the product
4. WARRANTY Extended Warranty Program omega com CEOMEGA www omega com e mail info omega com 1503001 CORPORATE OUALITY STAMFORD CT MANCHESTERA UK DP97 High Accuracy Digital Thermometer CONTENTS PAGE 1 INTRODUCTION 1 Full description of the DP97 Front Panel information at a glance 2 INSTALLATION 3 Supply Connection Input connections Sensors 3 OPERATION 4 i To read sensor temperature directly ii To read differential temperature iii Matching DP97 to calibrated sensors iv Error indications v 3Anire recognition 4 INSTRUMENT RE CALIBRATION 6 5 ANALOGUE RE TRANSMISSION OUTPUT 8 Connection and Operation 6 RS232 COMMUNICATIONS 9 Connection and Operation Using RS232 interface for digital probe matching corrections 7 USE OF CORRECTIONS PC SOFTWARE 12 Information in this publication may be subject to change the DP97 is a microprocessor based software driven instrument and may therefore be subject to software and hardware changes in line with our policy of continuous product development 1 INTRODUCTION A high precision portable thermometer for metrology and other exacting laboratory applications the DP97 is a proven instrument used world wide as a laboratory and site standard in pharmaceuticals medical food environmental testing R amp D and general industrial applications It is particularly suitable as the reference standard for temperature calibration baths
5. lt CR gt 0100 0000 Ohms 0000 0000 Deg C ok Y lt CR gt Entry 1 Ohms 138 510 lt GR gt Deg C 100 000 lt CR gt 0138 5100 Ohms 0100 0000 Deg C ok Y lt CR gt Done This would repeat for more points Pressing N at the ok Prompt will allow re entry of the point Once entered type LA OR LB TO SEE CONFIRM CONTENTS Rules of entry 1 Ohmic values must always increment from point to point 2 All values must be entered to THREE decimal places i e 001 0 001 10 001 are all ok Page 11 Note Use of the DP97 CORRECTIONS PC SOFTWARE supplied with the instrument facilitate the correction procedure by means of a much simplified user friendly approach described below 7 USE OF CORRECTIONS PC SOFTWARE for Digital Probe Matching a Instrument set up and software loading PC Requirements Any PC running in MS DOS and having a 3 disk drive mouse and mouse driver installed the software can be used without a mouse use up down arrows and or ALT key with the highlighted letter in each function box A printer will allow hard copies to be taken Using DP97 software amp RS232 interface lead i Connect the RS232 interface lead to the DP97 and to the PC according to the Pin configuration shown in section 6 ii Switch on the instrument and PC iii At the C gt prompt select the drive if this is the correct drive for the PC in use i e C a ENTER At the a gt prompt type TM C and ENTER
6. 2 Model and serial number of the product and under warranty and 3 Repair instructions and or Specific problems 3 Repair instructions and or specific problems relative to the product relative to the product OMEGA s policy is to make running changes not model changes whenever an improvement is possible This affords our customers the latest in technology and engineering OMEGA is a registered trademark of OMEGA ENGINEERING INC Copyright 2000 OMEGA ENGINEERING INC All rights reserved This document may not be copies photocopied reproduced translated or reduced to any electronic medium or machine readable form in whole or in part without the prior written consent of OMEGA ENGINEERING INC Servicing North America USA ISO 9001 Certified Canada USA and Canada Mexico Benelux Czech Republic France Germany Austria United Kingdom ISO 9002 Certified One Omega Drive P O Box 4047 Stamford CT 06907 0047 TEL 203 359 1660 e mail info omega com 976 Bergar Laval Quebec H7L5A1 TEL 514 856 6928 e mail info omega ca For immediate technical or application assistance FAX 203 359 7700 FAX 514 856 6886 Sales Service 1 800 826 6342 1 800 TC OMEGA Customer Service 1 800 622 2378 1 800 622 BEST Engineering Service 1 800 872 9436 1 800 USA WHEN TELEX 996404 EASYLINK 62968934 CABLE OMEGA En Espanol 001 203 359 7803 e mail espanol omega com info omega
7. The optional version permits the installation of the DP97 into a suitable panel cut out Supply Connection Primary power is provided by the internal rechargeable sealed lead acid battery which provides up to 12 hours operation from a full charge The external supply adapter for recharging and also allows operation directly from a 220 240V 50 60Hz supply or 110V 50 60Hz to special order The output lead with its fitted connector is connected to the appropriate rear panel mating connector Internal battery power can provide operation for up to 12 hours from full charge Low battery charge state is indicated by bAtt on the display Input Connections Sensors Platinum Resistance Thermometer s Pt100 must be fitted with a high quality D plug and connected to INPUT A and or INPUT B as required A 3 OR 4 wire configuration can be used but they are connected differently as shown The DP97 will automatically sense which configuration is employed Special care must be taken when connecting 3 wire resistance thermometer terminations to the connector pins A good crimp must be achieved to avoid Ohmic contacts which would result in reading errors Only use good quality connectors with gold contact mate rial the OMEGA D type is recommended Page 3 3 OPERATION Ensure that the instrument is connected to a suitable supply or has charged batteries and that the required input connections are made Switch on using the rear mou
8. com mx Servicing Europe Postbus 8034 1180 LA Amstelveen The Netherlands TEL 31 0 20 3472121 FAX 31 0 20 6434643 Toll Free in Benelux 0800 0993344 e mail nI omega com Rud armady 1868 733 01 Karvina 8 TEL 420 0 69 6311899 Toll Free 0800 1 66342 9 rue Denis Papin 78190 Trappes TEL 33 0 130 621 400 Toll Free in France 0800 4 06342 e mail france omega com Daimlerstrasse 26 D 75392 Deckenpfronn Germany TEL 49 0 7056 9398 0 FAX 49 0 7056 9398 29 Toll Free in Germany 0800 639 7678 e mail germany omega com FAX 420 0 69 6311114 FAX 33 0 130 699 120 One Omega Drive River Bend Technology Centre Northbank Irlam Manchester M44 5ex United Kingdom TEL 44 0 161 777 6611 Toll Free in United Kingdom 0800 488 488 e mail sales omega co uk FAX 44 0 161 777 6622 It is the policy of OMEGA to comply with all worldwide safety and EMC EMI regulations that apply OMEGA is constantly pursuing certification of its products to the European New Approach Directives OMEGA will add the CE mark to every appropriate device upon certification The information contained in this document is believed to be correct but OMEGA Engineering Inc accepts no liability for any errors it contains and reserves the right to alter specifications without notice WARNING These products are not designed for use in and should not be used for patient connected applications Where Do I Find Everything I Need for Pr
9. will depend on the command implemented and will be numeric or with commas and spaces as delimiters All replies will be terminated by CR and LF The first number will be an error code No error Calibration lost EEPROM corruption Broken probe Syntax error There will be no further numbers if a There is an error b The primary command was UNITS INPUT or LOCAL Further output will be provided in the case of MEASURE DUMP DIAGNOSE 1 MEASURE Eg If output is 0 2351 7 First number error code Second number value in units set by previous commands Page 10 For digital probe matching within the instrument version 2 1 only additional commands are used as follows CORRECTIONS A B turns OFF A corrections Turns Bon AB turns ON BOTH A amp B corrections OFF turns OFF BOTH A amp B corrections turns OFF B corrections Turns A on Whatever is set by this command is retained during power down Lists Ch A corrections Lists Ch B corrections Enter Ch A corrections Enter Ch B corrections Query Says Not enabled A B AB XX Disables corrections ENABLE Enables corrections IC Initialise corrections i e Erase useful after installing software For these commands to be actioned the SPANe key must be pressed as the command is typed Corrections entered as Follows Type TM Sends CA lt CR gt How Many Points 2 lt CR gt Entry 0 Ohms 100 000 lt CR gt Deg C 0 000
10. aud 8 data no parity 1 stop bit PC Software standard PC software running in MS DOS allows programming standard of custom calibration and preview of set values from aPC Also provides a print facility and storage of sets of correction values Analogue Output standard Analogue 0 to 1 Volt d c between programmable standard lower case and upper set limits representing channel A B or A B Accuracy 0 5 of reading Norisolated Page 19 WARRANTY DISCLAIMER OMEGA ENGINEERING INC warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase OMEGA s WARRANTY adds an additional one 1 month grace period to the normal one 1 year product warranty to cover handling and shipping time This ensures that OMEGA s customers receive maximum coverage on each product If the unit malfunctions it must be returned to the factory for evaluation OMEGA s Customer Service Department will issue an Authorised Return AR number immediately upon phone or written request Upon examination By OMEGA if the unit is found to be defective it will be repaired or replaced at no charge OMEGA s WARRANTY does not apply to defects resulting from any action of the purchaser including but not limited to mishandling improper interfacing operation outside of design limits improper repair or unauthorised modification This WARRANTY is VOID if the units shows evidence of having been tampered wit
11. authorised personnel from changing the values Primary power is provided by an internal re chargeable sealed lead acid battery which provides in excess of 12 hours operation from a full charge A mains adapter is provided for re charging and for operation directly from the mains A range of precision stainless steel sheath Pt100 probes is available for the DP97 Page 1 Front Panel Information at a Glance when you switch on c Pr 3 0 6 O Orms a Os sure ppe eeror srn aj sean v uns enaj C J ruo To obtain a reading from a temperature sensor select channel A or B 1 and select the required units 2 The appropriate indicator LED indicates the selected channel and units For version 2 1 the A and or B LED indicators according to the channel selected cycle between a steady on state and a brief off state occulting when corrections are stored and applied to measurements not applicable to version 1 4 To read differential temperatures from two sensors select channel A B 1 and select the required units 2 To set an A B reading of zero to null out probe differences press NULL 3 Error Indications The DP97 has several modes of error indication according to internal or external problems Refer to section 3 4 for details Page 2 2 INSTALLATION Back Panel General a The standard version is for bench top use Retractable legs can be extended to provide a convenient viewing angle b
12. b Using the software From MAIN MENU To input calibration values into the DP97 up to 10 may be used per channel i ii iii Click EDIT to obtain EDIT corrections menu Enter values against 01 through 10 but note that All 10 need not be entered When returning to main menu the U values are sorted into ascending order If the corresponding C values are not in ascending order the status box will show Error All values must be entered with up to three decimal places e g 0 001 10 001 etc Both C and U values must be entered Click return to Main Menu From Main Menu click FILES to obtain Load Save Print Menu Click SPECIFY Key file name into CURRENT SELECTION File names end with COR eg EXPI COR If COR is not keyed in it will be added automatically wnen ENTER is pressed or OK clicked Note File name should be cross referred to probe serial number Click SAVE to save file Click LOAD to load data Click RETURN TO MAIN MENU and note loaded values are shown under Calibration Points Click CHANNEL A lt gt B Click SEND to transmit correction values to DP97 Click CORRECT A B OR A B to switch on corrections Red dot in lower right hand corner of DP97 display window lights during comms activity Observe Channel A B status LED on DP97 occults to indicate corrections stored Within defined range If this does not occult probe reading does not lie within corrections range and corrections are n
13. h or shows evidence of having been damaged as a result of excessive corrosion or current heat moisture or vibration improper specification misapplication misuse or other operating conditions outside of OMEGA s control Components which wear are not warranted including but not limited to contact points fuses and triacs OMEGA is pleased to offer suggestions on the use of its various products However OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any damages that result from the us of its products in accordance with information supplied by OMEGA either verbal or written OMEGA warrants only that the parts manufactured by it will be as specified and free of defects OMEGA MAKES NO THER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER EXPRESS OR IMPLIED EXCEPT THAT OF TITLE AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OR MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED LIMITATION OF LIABILITY The remedies of purchaser set forth herein are exclusive and the total liability of OMEGA with respect to this order whether based on contract warranty negligence indemnification strict liability or otherwise shall not exceed the purchase price of the component upon which liability is based In no event shall OMEGA be liable for consequential incidental or special damages CONDITIONS Equipment sold by OMEGA is not intended to be used nor shall it be used 1 as a
14. hen in A B mode This gives an A B reading of zero when pressed regardless of any real difference value Page 4 iii Matching DP97 to Calibrated Sensors It is possible to automatically match the DP97 to a Pt100 sensor with up to 10 dedicated calibration values Such values published in an associated certificate indicate true Q versus C values corresponding b accurately known reference temperatures Up to 10 sets of values per sensor can be fed into the instrument via the RS232 interface using the associated software supplied with each version 2 1 instrument as standard By matching the instrument to a probe on this basis corrected temperature readings are obtained directly without the need for cross referencing to temperature resistance tables or to the calibration certificate This is particularly helpful when taking differential A B readings Refer to sections 6 and 7 for details iv Error Indications The DP97 has several modes of error indication according to internal or external problems as follows Display Cause Err 1 Calibration lost very unlikely Err2 Software fault Err 3 Broken probe connection Err 4 RS 232 command error BAtt Low battery Or Over range input Ur Under range input Only Err 1 Err 2 would require returning the instrument to our factory Note During normal operation if a selected probe is disconnected from the instrument the display will indicate Err 3 broken probe indica
15. k to Ohms If setting up in degrees some odd looking numbers may occur on the display The output falls to OV in the event of the selected span value being exceeded this is done to indicate such a condition Page 8 6 RS232 COMMUNICATIONS RS232 O00000 2 AX 3 TX 5 GND ISOLATED General Remote control will be seized by sending an RS232 character and relinquished by sending the LOCAL command While in remote control the front panel buttons will be locked out inoperative and the right hand decimal point will indicate remote operation local lock out RS232 parameters will be a fixed baud ate and word length 9600 Baud 8 Data No parity 1 stop bit Remote control of calibration has not been included Refer to section 4 Protocol Command strings are limited to a single statement action will occur on receipt of The end of line character All actions will return a status character followed by Data if appropriate The status will be e for a successful transaction Other values indicate syntax error broken probe etc All commands may be abbreviated to their first two letters eg UNITS OHMS becomes UN OH Input delimiters will be spaces or commas Page 9 Command set Display parameters UNITS OHMS UNITS Cc UNITS K UNITS F A INPUT INPUT B INPUT A B Analogue parameters SPAN Value in Ohms ZERO Value in Ohms Measurement MEASURE Return to Local LOCAL Output Protocol Replies
16. lied during normal operation We recommend a minimum of three correction values are programmed The DP97 corrects only in temperature C F K The Ohms value is not affected Therefore when measuring in Ohms in corrected mode channel annunciation lights will not occult SPECIFICATIONS All values are valid for a nominal 110v 240v 50Hz supply and 20 C ambient temperature 42 C Page 16 General Range Sensor type Overall Instrument Accuracy 4 wire Overall System Linearisation Conformity Stability vs ambient temperature Warm up Time Pt100 Sensor Current Display Resolution Measurement Units Measurement Modes Custom Calibration via PC software Null Function Sensor Lead Resistance Supply Pt100 to IEC 751 ITS 90 refers 199 99 to 849 99 C Ro 100Q Two input channels each 3 or 4 wire connection with automatic recognition with manual overrride 0 02 C 1 digit for range 200 C to 500 C 0 005 reading 1 digit for range 500 C to 850 C Better than 0 04 C with TM 1250 precision probe accuracy 4 wire from 50 C to 250 C with 5 point NAMAS calibration 0 01 C 0 0025 C C ambient change Negligible under normal ambient conditions Allow 5 to 10 minutes for full stability unless stored at low temperature then allow 30 minutes minimum 0 5mA nominal 0 01 C K F Q C F K Q user selectable Input A or B or A B differential Null facili
17. n either channel A or B i e A4 B3 or AS B4 or A3 B3 or A4 B4 if both probes are 4 wire l e 3 or 4 wire auto Selected 4 wire mode is mandatory on both channels A amp B I E A4 B4 Y Parameter The Y parameter gives the actual measuring mode of the currently selected channel except differential 3 wire measuring 4 wire measuring Differential Mode In A B mode the SPAN e figure is not to be relied upon because the values displayed will be for the last channel which has been read by the instrument and this could be A OR B In order to verify status of each channel select the channels A and B individually 4 INSTRUMENT RE CALIBRATION Re calibration of the DP97 is unlikely to be required routinely unless specified by user regulations If this is performed by someone other than the supplier guarantee of specification compliance may be invalid Page 6 The calibration kit option two precision resistors is required to perform re calibration No additional instruments are required since the DP97 self calibrates as follows Caution Do not proceed unless specified resistors are available Failure to do so may invalidate the warranty a With the supply disconnected remove the instrument case cover by removing the two screws on the rear g panel and sliding the cover off the rear of the instrument b Insert the jumper JP1 shorting connector this places the DP97 into self calibrating mode C
18. nted rocker switch The display will show Pr 2 1 or Pr 1 4 the programme designation There is a short delay while internal checks are carried out then the input A value will be displayed i To read sensor temperature directly a PRT input A is automatically selected at switch on Brief repeated key presses will step through the various functions or holding the key depressed will auto repeat scroll through this applies to the other functions as well Note If for any selected channel the sensor is either not connected or has a faulty connection including sensor open circuit the LED display will show Err 3 Press any button to resume normal operation either select another channel or rectify any fault and continue intended use b Press CHANNEL to select inputs A B or A B differential c Press UNITS to display the desired units C F K or Q ii To read Differential Temperature The difference in temperature between two PRT sensors can be obtained by displaying A B Ensure that the necessary sensors are connected to both A and B inputs as required Press CHANNEL to select A B Press UNITS to display the desired units The value now displayed is the difference between the input A and input B A B for the sensor type indicated Null Feature For calorimetry and other applications to optimise the precision of differential measurements probe tolerances can be nulled by pressing the NULL key w
19. ocess Measurement and Control OMEGA Of Course Shop online at www omega com TEMPERATURE Vv Thermocouple RTD 7 Thermistor Probes Connectors Panels amp Assemblies MI Wire Thermocouple RTD amp Thermistor VJ Calibrators and Ice Point References Mi Recorders Controllers amp Process Monitors M Infrared Pyrometers U RESSURE STRAIN AND FORCE Transducers amp Strain Gauges Load Cells amp Pressure Gauges Displacement Transducers Instrumentation amp Accessories OW LEVEL Rotameters Gas Mass Flowmeters amp Flow Computers Air Velocity Indictors Turbine Paddlewheel Systems Totalizers amp Batch Controllers pH CONDUCTIVITY v pH Electrodes Testers amp Accessories Mi Benchtop Laboratory Meters Mi Controllers Calibrators Simulators amp Pumps M Industrial pH amp Conductivity Equipment DATA ACQUISITION Data Acquisition amp Engineering Software Communications Based Acquisitions Systems Plug in Cards for Apple IBM amp Compatibles Datalogging Systems Recorders Printers amp Plotters ATERS Heating Cable Cartridge amp Strip Heaters Immersion amp Band Heaters Flexible Heaters Laboratory Heaters VIRONMENTAL MONITORING amp CONTROL Metering amp Control Instrumentation Refractometers Pumps amp Tubing Air Soil amp Water Monitors Industrial Water amp Wastewater Treatment pH Conductivity amp Dissolved Oxygen Instruments NANA AANA NANNANARE NAANANANZ AARAA
20. onnect the supply and switch on Calibration is simply a matter of connecting the precision resistors in sequence The necessary value of the resistor together with the input to which it has to be applied is indicated on the display The steps are as follows At this point the existing calibration has now been over written by default values The procedure should therefore now be completed i Connect 100 Ohm calibration resistor to PRT INPUT a ii Press SPAN e and display will show a value close to 100 Ohms If the value shown is wrong by more than 1 00 Ohms a fault exists and the Instrument must be returned for rectification iii Press SPAN e again and the instrument will compute the average value of 16 readings of the resistor value iv When the display reads A 250 connect the 250 Ohm calibration resistor to input A v Press SPAN e and display will show a value close to 250 Ohms If the value shown is wrong by more than 1 00 Ohms a fault exists and the instrument must be returned for rectification vi Press SPAN e again and the instrument will compute the average value of 16 readings of the resistor value vii Repeat steps I to vi for input B The DP97 then returns to a normal power up state PRT A degrees C Page 7 Switch off the Instrument 1 Remove the jumper lead JP1 This is VITAL Should the instrument be switched on with JP1 In position the calibration is lo
21. ot used Page 15 Stored values can be viewed at any time as follows e From Main Menu click CHANNEL to select channels A OR B e Click READ Stored values can be changed at any time by repeating input procedure Stored Values can be cleared from the DP97 at any time as follows e From Main Menu click CHANNEL A lt gt B e Click DISABLE e Click PRINT in load save print menu to print out corrections To exit programme and return to DOS click EXIT on Main Menu Note Although the DP97 stores only one set of corrections for each channel the number saved in the software is limited only by available diskette soace Data for many probes can thus be stored When using corrections the DP97 channel annunciation lights A or B will occult at 4 second intervals according to the channel selected In A B mode channel A and or B annunciation lights occult at 8 second intervals It is important to note that the DP97 will revert to its standard resistance versus temperature values for Pt100 sensors and the channel annunciation light will illuminate normally ie the instrument interpolates only and will not extrapolate to extend corrections outside the range entered When calibrating probes alone prior to programming corrections into the DP97 we recommend calibrating at a point slightly higher and a point slightly lower e g by 5 C than the maximum and minimum temperatures expected for the probe in use This ensures corrections are always app
22. st 2 Replace the instrument cover The instrument is now ready for normal use The central processor is software driven and no other adjustments or modifications should be attempted If it is necessary for the supplier to re calibrate an instrument in consequences of unauthorised persons so doing a charge may be made accordingly 5 ANALOGUE RE TRRANSMISSION OUTPUT D gt A O00000 0000 1 D gt A OUT 9 GNOD ANALOGUE This output varies linearly between 0 and 1 volt dc The output will be OV whenever the reading of the instrument is at or below the zero parameter as set by front panel button pushes or RS232 commands The output will be at 1 V whenever the reading is at the span parameter as set by the user Any reading between zero and span will result in an Analogue output signal proportional to the position of the reading with respect o the defined zero and span values To set up the output values 1 Zero Press SHIFT and ZERO e to raise the value in current units at which a zero output will occur Press SHIFT and ZERO e to reduce the value in a similar way 2 Span Press SHIFT and SPAN e to raise the value in current units at which a SPAN 1V output will occur Press SHIFT and SPAN e to reduce the value in a similar way The size of the increment is 0 1 Ohm This is necessary so as to eliminate the requirements of working from degrees in temperature K C or F bac
23. tion If the same probe is re connected Err 3 will remain on the display until any key is pressed v YWire Recognition DP97 requires a minimum of 80mQ lead resistance eg 1 metre of 7 stranded 0 2 mm wire to recognise a 4 wire probe Otherwise the instrument will default perhaps incorrectly to 3 wire mode lf a simulator is used to apply resistance values to check or calibrate the DP97 ensure that at least 80mQ of lead resistance exists between the simulator and the D plug Page 5 If using a shorter leadout from the probe or thicker gauge cable please ensure that the DP97 is in the correct wire recognition mode This can be checked by pressing the SPANe button ONCE Two numbers will be displayed e g 3 4 The first digit being the X parameter e g 3 and the second digit being the Y parameter e g 4 These displayed numbers will only be displayed momentarily Caution pressing the SPAN e button more than once or holding it down continuously will alter the X Y setting X Parameter This is a configurable parameter If the probe configuration is 4 wire but has a lead resistance of less than 80mQ per leg he instrument may recognise it as a 3 wire probe showing 3 3 the SPANe may be used to force the instrument into a 4 wire measurement mode by pressing SPAN e until X 4 To verify allow the DP97 to ead the currently selected channel and press SPAN e once the display will now show 4 4 3 or 4 wire mode is allowable o
24. ty in A B mode Up to 10 calibration values can be allocated to via PC software channels A and B Values are retained in non volatile memory until replaced by user Corrects differential temperature readout between the two Sensors to zero 25Q each lead maximum Page 17 Internal rechargeable batteries Mains 110 240V 50 60Hz adapter included Battery charge life up to 12 hours with full charge dependent on pattern of usage Power Consumption Series Mode Rejection Common Mode Rejection Ambient Temperature Range EMC Compliance CE Compliance Display Front Panel Controls Input Connections Mechanical Mechanical Case Dimensions Weight Charger requirement 10 11 5V d c 1A 10W nominal Max 20W when battery is charging 60dB 50Hz 50mV rms applied 30V rms applied between input and earth produces no measurable effect 0 50 C non condensing Ensure stable temperature range for best accuracy Allow adequate warm up time if moved from region of low ambient temperature prior to use Meets EMC regulations RFI to BS EN50081 1 1992 and immunity to BS EN 50082 1 1992 CE marked and compliant to current regulations 14mm LED 5 DIGIT 999 99 range 5 x membrane keys for user functions 2 x Pt100 via D connectors Metal bench top Optional panel mounting kit 145 x 66 x 240mm deep 1 5Kg approximately Page 18 Communications RS232 standard Remote control and measure Isolated 9600 B
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