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1. PIN M F CABLE 6 FT P N 6409 005 F 48 nnn R oi 7 25 VDC POWER SOURCE 7 23 voc er Neun ORT MALE ROWER SUPP lt oe Tye RX NE 232 9 PIN MALE 9 PIN M F CABLE 6 FT P N 5409 005 OPTIONAL PC MODEL 715 OPTIONAL Figure 20 Simple Model 715 Intelligent Transmitter System w Optional PC Shown M RS 232 RS 48 RS 232 TX 3 RS 232 RX RS 232 RX 2 RS 232 TX ND GNI POWER 9 TRANSMITTER POWER T GIQUARTZ INTELLIGENT DEVICE Ba VAL Powe E ee aa T is e RX RK WALL POWER SUPPLY P N 6377 11 f N 6377 004 22 OPTIONAL MODEL 715 Figure 21 Model 715 RS 232 Connection to an Intelligent Device SERIAL WIRING DIAGRAMS 15 5 gt FROM 6 16 VDC POWER SOURCE POWER SNI a5 b DIGIC ARTZ INTELLIGENT DEVICE PTIONAL WALL POWER PPLY ih REN n P N 77 004 220 VAC MODEL 7 Figure 22 Model 715 RS 485 Connection to an Intelligent Device SERIAL WIRING DIAGRAMS 16 Troubleshooting The following are solutions to frequently encountered problems If you are experiencing difficulty with a DIGIQUARTZ Intelligent device it is likely that the solution can be found below PROBLEM NO RESPONSE FROM DEVICE 1 Check your connections Check your connections to ensure tha
2. 0 cece cee cece ee ee eee e nent eee eaeeeeaees 7 19 TS Time reference stamp enable disable 2 7 29 U0 WUO coefficient u en Sagi a a a a ian 7 38 UF User defined unit factor ssssesssserssseeresrsrrsssresssree 7 19 UL Text to display on line 2 of Model 715 7 33 UM User defined unit label 0 0 ccc cece cece nee ee nent eeeeene ees 7 27 UN Pressure unit au anne 7 18 US Serial data unit Suffix 0 0 cece cece cence eee e ee eee ee nennen 7 24 VR Firmware Version peiors isini eari rea caus dsevisveeees RR 7 27 XM Resolution Mode os oa ecseri iirinn Eoria ra i 8 2 XN Number of significant digits 222222s2 se seseneenenennen 8 6 XT Number of temperature readings to average in FIR mode 8 5 Y1 Yl coefficient u u a mann 7 38 Y2 Y2 Coefficient u a anna anlaen 7 38 Y3 Y3 Coefficient u aus anne Brise bl 7 38 ZI Tare serial indication ccececc eee ecec eee eee esses eneeaeaeeas 7 25 ZL Tare lock seasick Gass bois Susie eee ee Lern Res 7 22 ZS Tare sswitchist te na RER hae age a 7 21 ZV Tare offset value dee eters 7 22 COMMAND AND PARAMETER REFERENCE NOTES Paroscientific Inc 4500 148 Avenue N E Redmond WA 98052 USA Tel 425 883 8700 Fax 425 867 5407 www paroscientific com Doc Number 8819 001 Rev P E MAIL support paroscientific com PAROSCIENTIFIC INC MAR 2009
3. Primary integration time commands PI TI Set or read the pressure measurement integration time Units Milliseconds Range 1 to 290000 001 to 290 seconds integer values only Default 666 Typical set command 0100EW 0100PI 1000 Typical set response 0001PI 1000 Typical read command 0100PI Typical read response 0001PI 1000 NOTE Whenever the value of PI is changed TI is automatically updated with the same value Set or read the temperature measurement integration time Units Milliseconds Range 1 to 290000 001 to 290 seconds integer values only Default 666 Typical set command 0100EW 0100TI 1000 Typical set response 0001TI 1000 Typical read command 0100TI Typical read response 0001TI 1000 NOTE Changing TI has no effect on PI NOTE It is usually recommended that TI and PI be set to the same value NOTE Do not set PI to a value of less that 10 when using a Model 715 display Doing so may result in an inconsistent display COMMAND DESCRIPTIONS 7 8 Legacy integration time commands PR TR 7 1 6 OI Set or read pressure measurement integration time Units None Range 1 to 16383 integer values only Default 238 Typical set command 0100EW 0100PR 200 Typical set response 0001PR 200 Typical read command 0100PR Typical read response 0001PR 200 NOTE Whenever the value of PR is changed TR is automatically updated with the value of PR times 4 NOTE Whenever the va
4. Typical response 000114 71234 Value 14 71234 000114 71235 Value 14 71235 000114 71234 Value 14 71234 NOTE P4 and P7 function identically when OI 0 COMMAND DESCRIPTIONS 7 4 P7 PS High speed continuous pressure measurement in selected engineering units Action Continuously sample and send pressure measurement values using temperature measurement interval specified by the current value of PS P7 automatically performs the following sequence 1 Initially measure temperature period Measure pressure period 3 Calculate temperature compensated pressure using last temperature period measurement 4 Send pressure value 5 Do steps 2 4 the number of times specified by PS then measure temperature period 6 Repeat steps 2 5 until commanded to stop Typical command 0100P7 Typical response 000114 71234 Value 14 71234 000114 71235 Value 14 71235 000114 71234 Value 14 71234 NOTE P7 allows you to maximize the pressure sampling rate by taking temperature measurements at the interval specified by the PS command Each subsequent pressure value is temperature compensated using the currently stored temperature value You can take a single initial temperature measurement or you can take periodic temperature measurements at the interval you select with the PS command Please refer to the PS command for more information NOTE P7 and P4 function identically when OI 0 Set or read the tempe
5. UNIVERSAL FEATURES AND FUNCTIONS 4 3 SAMPLE AND HOLD MEASUREMENT SAMPLING Similar to single measurement sampling but the measurement value is not output until a separate command is sent This type of sampling is useful when you need to simultaneously trigger measurements from multiple units and then read them one by one in a particular order Refer to Section 7 1 for detailed measurement command descriptions 4 5 Engineering units Pressure values can be expressed in the following engineering units Refer to the UN command in Section 7 2 3 for details e psi e inHg e hPa mbar e mm Hg Torr e bar e mH20 e kPa e User defined units e MPa Temperature values can be expressed in the following units Refer to the TU command in Section 7 2 3 for details e C e F 4 6 Serial data output modes In addition to the sampling types described in Section 4 3 DIGIQUARTZ Intelligent devices can also be configured to provide continuous pressure measurement data whenever power is applied Refer to Section 7 3 for details 4 7 Power management You can configure a DIGIQUARTZ Intelligent device to automatically switch to a low power sleep state after a user defined period of serial inactivity thus conserving power When serial activity resumes the unit will awaken allowing normal operation Refer to Section 7 2 4 for details 4 8 Tare and overpressure You can configure the DIGIQUARTZ Intelligent device to
6. C C QU GU D D D U To T TU T3U T4U T U Pressure coefficients Ci C C3 Di Dy Ti Ty T Ty Ts INTERNAL CALCULATIONS AND FORMULAS 17 1 FINAL OUTPUT PRESSURE CALCULATION The following equation is used with the pressure value calculated above to calculate the final output pressure value Poutput PM units multiplier x P PA Where Poutput Final output pressure value psi P raw pressure value from pressure equation above PM Value stored in the PM parameter PA Value stored in the PA parameter Units multiplier Value used to convert psi to the current pressure unit Refer to Section 7 2 3 for more information The PM and PA parameters allow you to make minor zero and span adjustments to the raw pressure value Normally PM pressure multiplier is set to 1 0 and PA pressure adder is set to 0 0 Refer to Sections 7 5 and 18 for more information INTERNAL CALCULATIONS AND FORMULAS 17 2 18 Zero and Span Adjustments The PM and PA commands allow you to make minor zero and span adjustments to the raw pressure value Normally PM pressure multiplier is set to 1 0 and PA pressure adder is set to 0 0 Adjusted pressure is calculated using the following equation P adjusted PM x P PA Where P Pressure calculated using original calibration coefficients in the current pressure units PM the current value of PM PA the current value of PA Refer to Sections 7 5 and 17 for
7. If your transmitter and buffer tube are not oil filled do not apply pressurized liquid media to the unit Liquid may contaminate the unit and may adversely affect the accuracy of the unit It is not possible to completely remove most liquids from the transmitter once they have been introduced For additional information see the application note Oil Filled Transducers Accuracy Performance and Handling at www paroscientific com INSTALLATION 3 2 4 Universal Features and Functions The following features and capabilities are common to all DIGIQUARTZ Intelligent Transmitters and Depth Sensors with dual RS 232 and RS 485 ports except as noted For the added benefits of nano resolution signal processing please refer to Section 8 4 1 Measurement basics The outputs from DIGIQUARTZ pressure transducers are two square wave signals whose period is proportional to applied pressure and internal transducer temperature The Intelligent electronics measures these signals using a technique similar to that of a common laboratory frequency counter Like the frequency counter a signal must be integrated or sampled for a specified period of time to measure its period The time over which the signal is sampled determines the resolution of the measurement Longer sampling times increase resolution but result in a slower sampling rate DIGIQUARTZ Intelligent devices allow you to set the integration time between 0 001 and 270 seconds i
8. Model 715 display Refer to Section 7 3 for details DO Selects either RS 232 or RS 485 communication with the Model 715 Set DO to 0 to communicate with the Model 715 display via the RS 485 port or set DO to to use the RS 232 port DM Selects the type of information to be displayed on the second line of the Model 715 display DP Selects the number of decimal points in displayed pressure measurements Refer to Section 7 2 8 for details on the MD DO DM and DP commands NOTE Do not set PI to a value of less that 10 when using a Model 715 display Doing so may result in an inconsistent display For reliable operation do not set baud rate BR to 115200 when using a Model 715 display USING THE MODEL 715 DISPLAY 12 1 12 3 Model 715 panel mounting instructions Overview The Model 715 can be adapted for use in panel or rack mounted applications This section provides the necessary mounting information Panel Preparation Modify the mounting panel per the drawing in Figure 3 All dimensions are in inches Figure 3 Model 715 Panel Cutout Detail Mounting Procedure 1 Remove back feet Remove the rear rubber feet from the Model 715 The feet are glued to the Model 715 and can be reattached in the future if needed USING THE MODEL 715 DISPLAY 12 2 2 Remove Set Screws Using a 1 16 hex key remove the two setscrews on the rear panel as shown in Fig 2 Slide out the panel mount brackets from the side
9. PC RS 232 port 9 pin male D sub connector 15 Serial Wiring Diagrams 15 1 RS 232 wiring diagrams 15 2 RS 232 serial loop network wiring diagram 15 3 RS 485 wiring diagrams 15 4 RS 485 multi drop network wiring diagrams 15 5 Model 715 Display wiring diagrams 16 Troubleshooting 17 Internal Calculations and Formulas 18 Zero and Span Adjustments 19 Command and Parameter Reference iv 12 1 12 1 12 1 12 2 13 1 14 1 14 1 14 2 14 2 14 3 14 4 14 4 14 5 14 6 14 6 14 7 14 8 15 1 15 1 15 2 15 3 15 4 15 5 16 1 17 1 18 1 19 1 1 Introduction 1 1 About this manual Thank you for your recent DIGIQUARTZ Intelligent Transmitter or Depth Sensor purchase This manual describes the operation of the entire line of Paroscientific DIGIQUARTZ Intelligent Transmitters and Depth Sensors equipped with dual RS 232 and RS 485 serial interfaces DIGIQUARTZ Intelligent devices that support RS 232 only are covered by a separate manual Paroscientific Document Number 8107 001 1 2 Latest features Starting with firmware revision R5 10 or later it is now possible to achieve parts per billion resolution nano resolution as opposed to parts per million resolution in standard mode This feature can be easily enabled disabled via software commands Please refer to Section 8 of for additional information on this new feature In addition hardware shipping with firmware R4 10 or later includes a time reference stam
10. 4 wire RS 485 System Single Device SERIAL WIRING DIAGRAMS 15 3 15 4 RS 485 multi drop network wiring diagrams RS 48 SERIAL HOST IWER J e e e eo e eo PWR GND TX RX TX RX PWR GND TX RX TX RX PWR GND TX RX TX RX D 1 D 2 D N INTELLIGENT INTELLIGENT INTELLIGENT DEVICE DEVICE 2 DEVICE N Figure 18 2 wire RS 485 Multi drop Network RS 48 SERIAL HOST TX TX RX ra r RX SNI ID To DC T7 DWER PWR GND TX TX RX RX PWR GND TX TX RX RX PWR GND TX TX RX RX DSt ID 2 ID N INTELLIGENT INTELLIGENT INTELLIGENT DEVICE DEVICE 2 DEVICE N Figure 19 4 wire RS 485 Multi drop Network SERIAL WIRING DIAGRAMS 15 4 15 5 Model 715 Display wiring diagrams The following diagrams illustrate a few typical Model 715 systems There are two ways to power the Model 715 using an optional wall power supply or via screw terminal blocks Both methods are shown on each diagram but only one power option is needed and either can be selected depending on your application j WALL POWER SUPPLY P N 6377 C 110 VA P N 6377 004 220 VA OPTIONAL E
11. Loss of any one data line through accident or failure will affect only those transmitters on that data line NETWORKING MULTIPLE INTELLIGENT DEVICES 11 6 12 Using the Model 715 Display The Model 715 is extremely simple and easy to use There are no controls to set or configure Simply connect the display to an appropriately configured DIGIQUARTZ Intelligent device and a DC power source and the Model 715 will display the desired information The Model 715 can communicate with a DIGIQUARTZ Intelligent device via either RS 232 or RS 485 You can therefore use either port to communicate with the Model 715 The Model 715 automatically sets its baud rate to match that of the DIGIQUARTZ Intelligent device The Model 715 provides a regulated 6 0 VDC output for powering a DIGIQUARTZ Intelligent device eliminating the need to power the Intelligent device separately 12 1 Serial and power connections DC power 7 25VDC 270 mA max can be applied to a terminal block on the rear panel or can be supplied by a 110VAC or 220 VAC wall power supply part numbers 6377 001 or 6377 004 Refer to Section 15 5 for Model 715 interconnection options 12 2 Configuring an Intelligent device for use with the Model 715 DIGIQUARTZ Intelligent devices must be configured to be used with the Model 715 display The following commands are available for this purpose MD Enables output of display data MD must be set to 1 or 3 for use with the
12. RESOLUTION Resolution is a function of the integration time when operating in FIR mode The integration time is set by the PIcommand Refer to page 7 8 for more information about the PI command Table 13 lists various PI values and the resulting measurement resolution for pressure period pressure and the number of digits reported Table 13 FIR Filter Mode Typical Resolution Ranges Period Resolution is the resolution of pressure and temperature period measurements Measurand Resolution is the statistical resolution limit of the FIR algorithm for pressure and temperature measurements The trigger error typically doubles the least resolution Pressure and Temperature Digits is the total number of digits used to report pressure and temperature measurements Pressure and temperature period measurements contain one additional digit up to a maximum of 13 digits NANO RESOLUTION FEATURES AND FUNCTIONS 8 4 TEMPERATURE SMOOTHING The temperature smoothing function is available for additional low pass filtering of the temperature signal mostly to avoid very rare and small aliasing errors from digital rounding in the FIR mode The XT command enables and disables the smoothing function and controls the corner frequency of the low pass filter Normally the default setting should always be XT 1 no smoothing If temperature smoothing is desired a setting of XT 10 is suggested Temperature smoothing is performed per the following for
13. Time Resolution and Sampling Rate for P4 Command Resolution Integration Time Sampling Rate Hz PI ppm sec 9600 Baud 57600 Baud 115200 Baud Ol 0 Ol 1 Ol 0 Ol 1 Ol 0 Ol 1 Ol 0 Ol 1 Ol 0 Ol 1 678 200 339 100 0 001 0 002 106 70 106 70 442 90 315 50 449 40 310 30 226 100 113 000 0 003 0 006 106 70 106 70 236 80 138 60 236 40 137 40 8 84 770 42 390 0 008 0 016 87 30 58 00 108 80 58 00 108 00 58 00 11 61 650 30 830 0 011 0 022 81 80 42 90 81 80 42 90 81 80 42 90 17 39 890 19 950 0 017 0 034 55 10 21 80 55 10 21 80 55 10 21 80 34 19 950 9 970 0 034 0 068 28 40 14 40 28 40 14 40 28 40 14 40 67 10 120 5 060 0 067 0 134 14 60 7 37 14 60 7 37 14 60 7 37 134 5 061 2 530 0 134 0 268 7 38 3 71 7 38 3 71 7 38 3 71 333 2 037 1 018 0 333 0 666 2 99 1 50 2 99 1 50 2 99 1 50 666 1 018 0 509 0 666 1 332 1 50 0 75 1 50 0 75 1 50 0 75 1333 0 509 0 254 1 333 2 666 0 75 0 38 0 75 0 38 0 75 0 38 3332 0 204 0 102 3 332 6 664 0 30 0 15 0 30 0 15 0 30 0 15 6664 0 102 0 051 6 664 13 328 0 15 0 08 0 15 0 08 0 15 0 08 13328 0 051 0 025 13 328 26 656 0 08 0 04 0 08 0 04 0 08 0 04 26656 0 025 0 013 26 656 53 312 0 04 0 02 0 04 0 02 0 04 0 02 45872 0 015 0 007 45 872 91 744 0 02 0 01 0 02 0 01 0 02 0 01 NOTES Please refer to Sections 4 3 and 7 1 6 for more information ab
14. a serial loop network the output mask must begin with a STAR command code and the second and third characters of the resulting response data must not match the address of any intelligent devices on the serial loop network TEXT STRINGS Text strings are literal text delimited by quote characters They can be inserted at any location with the output mask The most common use of text strings is to annotate measurement values Example This is my text will output This is my text less the quote characters when executed NUMERIC FORMAT SPECIFIERS Numeric format specifiers are used to control the format of measurement values The command codes that can be used with numeric format specifiers are identified as such in Table 1 Numeric format specifiers are placed immediately after the command code to which they apply Numeric format specifiers have the syntax x y where x and y are any number between 0 and 9 The x value specifies the number of digits to the left of the decimal point that will be output All digits to the left of the decimal point are always output regardless of the x value Ifthe x value is greater than the number of digits to the left of the decimal point the output will be padded with leading zeros The y value specifies the number of digits to the right of the decimal point that will be output If the y value is less than the number of digits to the right of the decimal point the output will be rounded to the
15. calculate final output pressure P output PM P au PA where Where P Pressure calculated using original calibration coefficients in the current pressure units PM the current value of the PM parameter PA the current value of the PA parameter Range 9999999 to 9999999 Default 0 0 COMMAND DESCRIPTIONS 7 36 Typical set command 0100EW 0100PA 0000123 Typical set response 0001PA 0000123 Typical read command 0100PA Typical read response 0001PA 0000123 NOTE The value of PA is entered in the current pressure units but is converted to psi prior to being stored When PA is queried it returns the value scaled to the current pressure units PM Set or read the pressure multiplier parameter Action The pressure multiplier parameter is used to make span adjustments to the calibration See the formula in the PA command description Range 9999999 to 9999999 Default 1 Typical set command 0100EW 0100PM 1 000123 Typical set response 0001PM 1 000123 Typical read command 0100PM Typical read response 0001PM 1 000123 NOTE The value of PM is dimensionless and is therefore not scaled if the units are changed TC Read the crystal timebase correction factor Action TC is used to normalize the nominal 14 7456 MHz reference crystal frequency to 10 MHz to compensate for the natural variation in crystal resonant frequency TC is a read only command Typical read command 0100TC Typical read respo
16. first method processes the sub samples in a finite time interval analogous to the integration time of the standard mode The digital process is an FIR filter finite impulse response The resolution can be directly compared to the resolution of the standard mode at the same sampling rate synchronized The algorithm performs a least squares regression fit over the sub samples to estimate the best value of pressure While the resolution is statistically two orders of magnitude better than the standard mode it does not suppress aliasing errors A second and usually preferred method is the IIR filter infinite impulse response It consists of a 5 stage digital low pass filter acting on the sub samples It filters all frequencies with a roll off of 100 dB decade above a user selectable cutoff frequency It is an effective anti aliasing filter The inherent resolution depends on the cutoff frequency and not on the sampling period Typically the sampling rate is set at twice the cutoff frequency Nyquist limit NANO RESOLUTION FEATURES AND FUNCTIONS 8 1 8 2 Enabling Nano Resolution Nano resolution can be enabled and disabled by the XM serial command XM Set or read the resolution mode Range 0 Standard Resolution Mode backward compatible 1 Nano resolution IIR Filter Mode 2 Nano resolution FIR Filter Mode Default 0 Typical set command 0100EW 0100XM 1 Typical set response 0001XM 1 Typical read command 0100XM Typ
17. number of digits specified If the y value is greater than the number of digits to the right of the decimal point the output will be padded with trailing zeros Refer to Table 2 for examples Table 2 User defined Numeric Formatting Examples Output Mask Value Output P1 5 14 56789 14 56789 MINPS 5 14 56789 00014 56789 MAXP2 2 14 56789 14 57 P2 7 14 56789 14 5678900 P5 7 14 56789 00014 5678900 COMMAND DESCRIPTIONS 7 12 COMMANDS OM OF Set or read the user defined command output mask Three output masks can be defined OM1 OM2 and OM3 The number is optional if no number is specified OM1 is assumed Range 200 characters maximum Default OM1 STAR HA UA P CRLF OM2 STAR HA UA P PU CRLF OM3 STAR Pressure P PU P Period PPER Temp ST TU T Period TPER CRLF Typical set command 0100EW 01000M Pressure P CRLF Typical set response 0001OM Pressure P CRLF Typical read command 01000M Typical read response 00010M Pressure P CRLF If a syntax error is detected an error code is returned along with the output mask up to the point where the error was detected The syntax error will be between the last comma and the end of the returned output mask Refer to Table 3 for the list of OM error codes and descriptions Table 3 OM Command Error Codes OM Error Code Description Ol Unrecognized command 02 M
18. stamp feature is not compatible with fetch mode If FM 1 fetch mode active gt ERR S1 is returned instead of the time reference stamp value Examples Pressure 14 74638 time reference stamp 500637 microseconds P3 response DL 0 000114 74638 500637 P3 response DL 1 0001 14 746380000 000500637 COMMAND DESCRIPTIONS 7 29 Transmission delay The response data as seen by the serial host is delayed by the time it takes to transmit the data For high accuracy applications it is necessary to compensate for this delay The formula for calculating the transmission delay time is as follows T N 10 1E6 BR Where T transmission delay in microseconds N number of characters transmitted BR baud rate Don t forget to consider the carriage return and line feed characters when determining the number of characters transmitted Processing delay For high accuracy applications it is also necessary to compensate for any delay by the serial host in acknowledging the first character of the response data 7 2 9 Model 715 Display configuration commands The Display Configuration commands configure the DIGIQUARTZ intelligent device for use with an optional Model 715 display DM Action Set or read the display mode The display mode determines which data if any is displayed on the second line of an optional Model 715 display The following table describes the supported display modes Table 10 DM Command Opti
19. subtract a value from each subsequent pressure measurement This process is referred to as taring You can tare to the current pressure value or to any value you specify Taring can be initiated by contact closure via a dedicated digital input line or by serial command A dedicated digital output and or a special character in the measurement data can be used to indicate whether taring is in effect Refer to Sections 7 2 5 and 13 for details UNIVERSAL FEATURES AND FUNCTIONS 4 4 You can configure the DIGIQUARTZ Intelligent device to indicate whether the measured pressure exceeds a user specified setpoint This indication is provided via a dedicated digital output line Refer to Sections 7 2 5 and 13 for details NOTE Tare and overpressure I O lines are not available with DIGIQUARTZ Intelligent Depth Sensors 4 9 Measurement data formatting Several serial data formatting options have been provided and are listed below Refer to Section 7 2 6 for details User Defined Commands Lets you create your own custom measurement commands containing any combination of measurement values and text strings See the OF and OM commands for details Engineering Unit Suffix Appends the engineering unit to pressure and temperature measurement data See the US command for details Underscore Separator Adds underscore s to pressure and temperature measurement data to separate the measurement value from the address header and optional engineer
20. use try sending a global SN command 9900SN and check the response s to see which ID s responded TROUBLESHOOTING 16 1 PROBLEM INTELLIGENT DEVICE DOES NOT RESPOND TO A COMMAND BUT RESPONDS TO SUBSEQUENT COMMANDS e The Intelligent device is probably asleep when the first command is received but is awake when the second command arrives Therefore the first command is ignored and the second command is acted upon To avoid this either wake up the device before attempting a command or disable sleep mode Refer to the SL command for more information TROUBLESHOOTING 16 2 17 Internal Calculations and Formulas DIGIQUARTZ Intelligent devices calculate internal sensor temperature and applied pressure from period measurements of two frequency signals The equations and coefficients used to perform these calculations are given below The coefficients are factory set and are stored in non volatile EEPROM Refer to Section 7 5 for more information TEMPERATURE CALCULATION The following equation is used to calculate internal sensor temperature T Y U Y2U Y3U Where T Temperature C U temperature period microseconds Up microseconds Temperature coefficients Uo Y Y2 Y3 PRESSURE CALCULATION The following equation is used to calculate pressure P C 1 Ty Tau 1 D 1 Ty Tau Where P pressure Tau pressure period microseconds U temperature period microseconds Up microseconds
21. virtually all parameter values you must precede the command with an EW command This prevents accidental alteration of stored parameter values Please refer to Section 7 2 1 for more information about the EW command Measurement commands typically generate a response that contains the measurement data Parameter set commands typically generate a response that reports the updated parameter value Parameter read commands report the current parameter value 6 5 Command and response format Commands are typically sent in the following form 0100P3CrLf Where start character ASCII 42 01 Destination ID ID of intelligent device that is to respond to the command 00 Source ID Serial host is ID 00 P3 Command P3 is an example Refer to Section 7 for descriptions of the entire command set Cr Carriage return ASCII 13 Lf Linefeed character ASCII 10 GETTING STARTED 6 2 Responses are typically received in the following form 000114 4567CrLf Where start character ASCII 42 00 Destination ID ID of serial host 01 Source ID ID of device that is responding 14 4567 Data Data sent in response to a measurement command Cr Carriage return ASCII 13 Lf Linefeed character ASCII 10 These examples are typical Refer to Section 7 for specific details regarding each supported command 6 6 DIGIQUARTZ software programs Paroscientific provides software programs that simplify common measurement and config
22. 0001PL 120 0000 NOTE PL is typically factory set to 1 2 times full scale pressure COMMAND DESCRIPTIONS 7 32 UL Set or read the text to be displayed on line 2 of the Model 715 display when DM 2 Action UL defines the text to be displayed on line 2 of an optional Model 715 display when DM 2 The value of UL is stored in non volatile memory and will therefore be retained even if power is lost The value of UL is sent to the optional Model 715 display each time the pressure data is updated Range 11 characters maximum Any characters in the range of ASCII 32 to ASCII 127 are legal Default 11 space characters Typical set command 0100DEW 0100UL My label Typical set response 0001UL My label Typical read command 0100UL Typical read response 0001UL My label COMMAND DESCRIPTIONS 7 33 7 3 Serial data output mode command The following command controls whether pressure data is continuously output and whether display data are produced MD Set or read the serial data output mode Action MD configures the intelligent device for continuous pressure measurement output and or display data output whenever power is applied Table 11 MD Command Options MD Model 715 display Continuous pressure value data output data output 0 Off Off 1 On Off 2 Off On 3 On On Once MD is set the specified serial data output mode will remain in effect until MD is set to a different value even through a pow
23. 024 001 or 6024 002 9 pin serial cable p n 6409 003 Step 1 Connect up the system If you have the Power Module Kit Connect up the system as shown in Figure 13 in Section 15 Plug in the wall power supply If you don t have the Power Module Kit Connect up the system as shown in Figure 14 in Section 15 Step 2 Run Digiquartz Interactive 2 0 DQI Install Digiquartz Interactive 2 0 on your PC Digiquartz Interactive 2 0 can be installed from the Digiquartz CD Library that was included with your instrument Connect the RS 232 port of your instrument to the RS 232 port of your PC and power up the instrument Run Digiquartz Interactive 2 0 Select the Configuration and Monitoring option and click Next Set the Search Type to RS 232 USB If the RS 232 COM port number is known set COM Port to that value if the COM port number is unknown set COM Port to All Set Baud Rate to All Click Begin Search DQI will attempt to detect the MET4 MET4A and if successful will display its serial number and communications parameters NOTE If the search ends and your instrument is not located close DQI 2 0 and ensure that your instrument is powered and properly connected to the PC RS 232 port before running DQI 2 0 again When your instrument is located click Next to continue Click the Numerical Display Tab QUICK START 5 1 e Select your instrument from the Instrument List and click Start Pressure and diagnostic measu
24. 122 346 Value 22 346 000122 345 Value 22 345 7 1 4 Minimum Maximum pressure commands DIGIQUARTZ Intelligent devices support commands that return the minimum and maximum pressure measurement values taken since the most recent reset event The minimum and maximum pressure values will be reset to the next pressure measurement value when the MR command is received coefficients or PA PM are changed taring is enabled or disabled or power is cycled After being reset the minimum and maximum pressure values are not valid until a pressure measurement has been made COMMAND DESCRIPTIONS 7 6 M1 Read the minimum pressure measurement values taken since the most recent reset event M1 is a read only command Units Current pressure unit set by UN command Typical read command 0100M1 Typical read response 0001M1 14 12345 NOTE The minimum pressure value will be scaled to the new pressure unit if the value of UN is changed M3 Read the maximum pressure measurement values taken since the most recent reset event M3 is a read only command Units Current pressure unit set by UN command Typical read command 0100M3 Typical read response 0001M3 14 12345 NOTE The maximum pressure value will be scaled to the new pressure unit if the value of UN is changed MR Reset the minimum and maximum pressure values Action Resets the minimum and maximum pressure to the next pressure measurement value Typical command 0100MR Typical
25. 900DS NOTE DS is available in firmware version R3 00 and later NOTE DS is only useful in RS 232 serial loop applications Do not use DS in RS 485 applications NOTE DS returns measurement command responses in sequential order according to the location of the devices on an RS 232 serial loop COMMAND DESCRIPTIONS 7 3 7 1 3 Continuous measurement commands The following commands are used to initiate and control continuous measurements Continuous measurement commands repeatedly take measurement samples and return measurement values until commanded to stop or power is lost Continuous measurement commands are cancelled when any valid command is received and do not resume when power is cycled NOTE Fetch Mode does not affect continuous measurement commands Refer to Section 7 1 6 for more information about Fetch Mode P2 P4 Continuously sample and send pressure period measurement values in microseconds Action Measure pressure period send pressure period value and repeat until commanded to stop Typical command 0100P2 Typical response 000128 123456 Value 28 123456 000128 123457 Value 28 123457 000128 123456 Value 28 123456 Continuously sample and send pressure measurement values in selected engineering units Action Measure temperature period measure pressure period calculate temperature compensated pressure send pressure value and repeat until commanded to stop Typical command 0100P4
26. AND DESCRIPTIONS 7 16 ID Set the device ID Action The ID command is used to set the device ID The ID command must be addressed to 99 the global address The device ID is set to the destination ID 1 For example if the command 9900ID were sent the device would be set to ID 1 00 1 Range 01 to 97 Default 01 Typical set command 9903ID to set device ID to 04 Typical set response 9904ID Indicates device ID was set to 04 NOTE The response shown above assumes that the RS 232 port is being used If the RS 485 port were being used no response would have been sent CAUTION Do not send the ID command when multiple devices are connected together in an RS 485 multi drop network Doing so will set all devices on the network to the same ID Refer to Section 11 3 for more information about using the ID command in an RS 485 multi drop network COMMAND DESCRIPTIONS 7 17 7 2 3 Engineering units commands Engineering units commands are used to specify the engineering units to be used when calculating pressure or temperature values and to configure the user defined pressure unit UN Set or read the pressure engineering units Action Sets or queries the conversion factor by which all calculated pressure values are multiplied before being output Setting UN to a non zero value selects one of eight standard pressure units 0 selects a user defined unit whose conversion factor is specified by the UF command U
27. E INTELLIGENT DEVICES 11 4 11 4 RS 232 serial loop networking RS 232 serial loop networking can be used when RS 485 communications are not available or are impractical and provides network compatibility with previous DIGIQUARTZ Intelligent devices that do not support RS 485 Refer to Figure 2 below In an RS 232 serial loop network the transmit output of the RS 232 host is connected to the receive input of the first device in the loop The transmit output of the first device is connected to the receive input of the next device The remaining devices are connected similarly with their receive input connected to the transmit output of the previous device and their transmit output connected to the receive input of the next device The transmit output of the last device is connected to the receive input ofthe RS 232 host The host sends commands to the first device in the loop Ifa command is addressed to that device the command is carried out if not the command is resent to the next device Globally addressed commands are carried out by each device and are also resent to the next device When a device responds to a command the response is addressed to the host and is therefore resent by each device that receives it until it eventually makes it way to the serial host TRANSMIT cH RECEIVE TRANSMIT c RECEWE TRANSMIT gt RECEIVE TRANSMIT ID 0 ID 02 ID 05 INTELLIGENT INTELLIGENT INTELLIGENT DEVICE D
28. ENSOR SIGNAL RS 232 TX RS 232 RX Power signal ground Power consult SCD RS 485 RX RS 485 RX RS 485 TX RS 485 TX Figure 6 Burton 5507 1508 000X Connector Pinout CIN DI Ns PJIw IN CONNECTOR DIAGRAMS 14 2 14 2 2 Intelligent gauge depth sensors Burton 5999 0962 002 PIN DEPTH SENSOR SIGNAL RS 232 TX RS 232 RX Power signal ground Power consult SCD RS 485 RX RS 485 RX RS 485 TX RS 485 TX Figure 7 Burton 5999 0962 002 Connector Pinout SININ NBL WIN CONNECTOR DIAGRAMS 14 3 14 3 Model 715 connectors 14 3 1 Model 715 15 pin female high density D sub PIN MODEL 715 RS 232 RS 485 SIGNAL 1 Chassis ground 2 RS 232 TX 3 RS 232 RX 4 Not used 5 Power signal ground 6 Tare output 7 Tare switch input 8 Overpressure output 9 Power consult SCD 10 Not used 11 Not used 12 RS 485 TX 13 RS 485 TX 14 RS 485 RX 15 RS 485 RX Figure 8 DB15HD F Model 715 Connector Pinout CONNECTOR DIAGRAMS 14 4 14 3 2 Model 715 9 pin female D sub PIN MODEL 715 RS 232 SIGNAL 1 Chassis ground 2 RS 232 TX 3 RS 232 RX 4 Not used 5 Signal ground 6 Not used 7 Not used 8 Not used 9 Not used Figure 9 DB9 F Model 715 Connector Pinout CONNECTOR DIAGRAMS 14 5 14 4 Power Adapter Modul
29. EVICE 2 DEVICE 3 RECEWE ID 00 SERIAL HOST Figure 2 Serial loop network block diagram There are several points to keep in mind when designing an RS 232 serial loop network e As previously described each device resends any command or response that is addressed to another device Since each device considers resending to be a higher priority than sending its own response it is possible that a device can spend all its time resending and never have an opportunity to send its own response This occurs only when one or more upstream devices are continuously transmitting To prevent this situation Operate your network at 9 600 baud or above Avoid continuous transmission P2 P4 P7 Q2 and Q4 commands at extremely low integration times NETWORKING MULTIPLE INTELLIGENT DEVICES 11 5 e Serial loop networking is limited to baud rates of 19 200 and below e A single ID command will automatically set all devices on the serial loop to unique sequential IDs e It is not possible to precisely synchronize measurements from two or more devices by sending a global measurement command This is a result of the delay that occurs as the measurement command propagates through the serial loop If precise measurement synchronization is required consider an RS 485 multi drop network instead e When a global command is sent it propagates through the serial loop eventually making its way back to the host Therefore the data receiv
30. Measurement data are provided directly in user selectable engineering units with a typical total accuracy of 0 01 or better over a wide temperature range Pressure measurements are fully temperature compensated using a precision quartz crystal temperature sensor Each intelligent depth sensor is preprogrammed with calibration coefficients for full plug in interchangeability 2 3 Model 715 Display The Model 715 is an LCD display unit that can be used with DIGIQUARTZ Intelligent devices that are equipped with dual RS 232 and RS 485 serial interfaces It features a two line 16 character alphanumeric LCD display that is backlit to ensure readability even in low light conditions The Model 715 can communicate with a DIGIQUARTZ Intelligent device via either RS 232 or RS 485 The Model 715 is housed in a sturdy metal enclosure that conforms to DIN specifications It is designed for easy panel mounting but can also function as a tabletop instrument when used with the optional bench stand HARDWARE DESCRIPTIONS 2 1 3 Installation DIGIQUARTZ Intelligent Transmitters can generally be mounted in any orientation Mounting hole patterns for units so equipped can be found on the Specification Control Drawing SCD supplied with the unit CAUTION Pressure head effects vary with transmitter orientation and result in zero offsets These effects are more pronounced when liquid filled pressure lines are being used These effects can be m
31. N also sets the units of the pressure data displayed by an optional Model 715 display Range 0 to 8 Table 6 UN Command Options UN value Pressure units psi multiplied by 0 User defined pressure unit Value of UF 1 psi 1 0000000 2 hPa mbar 68 94757 3 bar 0 06894757 4 kPa 6 894757 5 MPa 0 00689476 6 in Hg 2 036021 7 mm Hg Torr 51 71493 8 m H O 0 7030696 Default 1 Typical set command 0100EW 0100UN 2 Typical set response 0001UN 2 Typical read command 0100UN Typical read response 0001UN 2 COMMAND DESCRIPTIONS 7 18 UF Set or read the user defined pressure engineering units conversion factor Action When UN 0 calculated pressure values psi are multiplied by the value of UF before being output thus scaling the pressure values in the desired user defined pressure units Range 9999999 to 9999999 Default 1 0000000 Typical set command 0100EW 0100UF 2 Typical set response 0001UF 2 000000 Typical read command 0100UF Typical read response 0001UF 2 000000 TU Set or read the temperature engineering units Action Specifies the temperature units for Q3 Q4 Q5 and temperature data displayed by an optional Model 715 display Range 0 C 1 F Default 0 Typical set command 0100EW 0100TU 1 Typical set response 0001TU 1 Typical read command 0100TU Typical read response 0001TU 1 NOTE Temperature is always calculated in C but it is converte
32. Paroscientific Inc Digiquartz Pressure Instrumentation User s Manual For Digiquartz Broadband Intelligent Instruments with Dual RS 232 and RS 485 Interfaces SERIES 1000 6000 9000 INTELLIGENT PRESSURE TRANSMITTER SERIES 8CDP 8CB INTELLIGENT DEPTH SENSOR MODEL 715 DISPLAY RS 232 RS 485 SERIAL INTERFACE BOARD The standard by which other standards are measured Technology OPERATION MANUAL FOR DIGIQUARTZ BROADBAND INTELLIGENT INSTRUMENTS WITH DUAL RS 232 AND RS 485 INTERFACES SERIES 1000 6000 9000 INTELLIGENT PRESSURE TRANSMITTER SERIES SCDP 8CB INTELLIGENT DEPTH SENSOR MODEL 715 DISPLAY RS 232 RS 485 SERIAL INTERFACE BOARD REVISION P DOCUMENT NO 8819 001 C MARCH 2009 WWW PAROSCIENTIFIC COM COPYRIGHT 2009 PAROSCIENTIFIC INC TABLE OF CONTENTS 1 Introduction 1 1 1 2 1 3 1 4 1 5 About this manual Latest features Conventions used in this manual Safety precautions Manual summary 2 Hardware Descriptions 2 1 22 2 3 Intelligent Transmitters Series 1000 6000 9000 Intelligent Depth Sensors Series 8CDP 8CB Model 715 Display 3 Installation 3 1 3 2 Pressure ports and buffer tubes Oil filled vs non oil filled units 4 Universal Features and Functions Measurement basics Measurement descriptions Measurement modes Sampling types Engineering units Serial data output modes Power management Tare and overpressure Mea
33. able taring When ZL 1 the value of ZS cannot be modified via serial commands or the Tare Input I O line However if ZS 1 and a ZL 1 command is issued taring will be in effect when the next pressure measurement is taken but you cannot turn taring off until ZL is set to 0 The value of ZL is set to 0 on power up Range 0 or 1 Default 0 Typical set command 0100EW 0100ZL 1 Typical set response 0001ZL 1 Typical read command 0100ZL Typical read response 0001ZV 1 COMMAND DESCRIPTIONS 7 22 OP Set or read the overpressure alarm setpoint value Action When a pressure measurement value is less than the value of OP the Overpressure I O line is at logic low 0 VDC if it is greater or equal to the value of OP the Overpressure I O line is set to logic high 3 3 VDC Refer to Section 13 for more information OP is set in the current pressure units and is scaled accordingly if the engineering units are changed Range 9999999 to 9999999 Default Maximum rated device pressure Typical set command 0100EW 01000P 15 Typical set response 00010P 15 00000 Typical read command 01000P Typical read response 00010P 15 00000 7 2 6 Measurement data formatting commands These commands are used to alter the format of serial measurement data The following data formatting functions are available Append engineering units to pressure and temperature measurement data Append a taring indication to tared pressure measureme
34. al set command 9900BR 19200 both ports set to 19200 Alternate set command 9900BR1 19200 RS 232 port set to 19200 Alternate set command 9900BR2 19200 RS 485 port set to 19200 Typical set response 9900BR 19200 CAUTION Be careful to only set the baud rate to a value supported by your serial host If you accidentally set the baud rate to an unsupported value and subsequently lose serial communications use a PC and the DIGIQUARTZ Terminal program to establish communications and restore the baud rate to a supported value COMMAND DESCRIPTIONS 7 15 BL Set or read the Baud Lock parameter Action The BL command is used to prevent an accidental change of baud rate The BL command must be preceded with an EW command The BL set command must be addressed to 99 the global ID this ensures that all units on a network are set to the same baud lock state Values 0 Baud rate can be changed with BR command 1 BR command is ignored Default 0 Typical set command 9900EW 9900BL 1 Typical set response 9900DEW Echoed EW command 0001BL 1 Response from device 9900BL 1 Echoed command Typical read command 0100BL Typical read response 0001BL 1 NOTE The response shown above assumes that the RS 232 port is being used If the RS 485 port were being used no response would have been sent Refer to section 11 3 for more information NOTE The BL command affects both the RS 232 and the RS 485 ports COMM
35. and P2 P4 P7 Q2 Q4 is received and resumes when the continuous measurement command is cancelled NOTE When DO 0 continuous pressure measurement data produced by MD 2 and MD 3 is output on the RS 232 port When DO 1 continuous pressure measurement data produced by MD 2 and MD 3 is output on the RS 485 port COMMAND DESCRIPTIONS 7 35 7 4 Diagnostic commands In the unlikely event of a hardware failure the Diagnostic commands can assist in the troubleshooting process CS Read the number of unused bytes on the stack since power up Action CS is read only it cannot be set It can be used to determine whether a stack overflow may have occurred Typical read command 0100CS Typical read response 0001CS 8 7 5 Calibration commands The calibration commands set and read several parameters that directly affect the measurement accuracy of the device Refer to Sections 17 and 18 for more information regarding the use of the calibration parameters CAUTION Calibration values should be modified only when absolutely necessary and then with extreme caution Calibration adjustments should only be performed by a qualified metrology lab PA Set or read the pressure adder parameter Action The pressure adder parameter is used to make zero adjustments to the calibration PA can also be used to offset absolute pressure measurements by atmospheric pressure to obtain gauge pressure PA and PM are used in the following formula to
36. ation is selected the total integration time is equal to either the pressure PI or temperature TD integration time whichever is greater When Sequential Integration Simulation is selected the total integration time is equal to the sum of the pressure PI and temperature TI integration times Refer to Section 4 3 for more information about Simultaneous Integration Sequential Integration and Sequential Integration Simulation FM Set or read Fetch Mode enable Action The FM command is used to select Trigger Mode or Fetch Mode When in Trigger Mode the unit initiates a new measurement when the measurement command is received This is the mode in which DIGIQUARTZ Intelligent devices have traditionally operated In Fetch Mode measurement data is continuously acquired in the background and the unit responds immediately to measurement commands with the most recent measurement value Values 0 Unit operates in Trigger Mode 1 Unit operates in Fetch Mode Default 0 Typical set command 0100EW 0100FM 1 Typical set response 0001FM 1 Typical read command 0100FM Typical read response 0001FM 1 NOTE When in Fetch Mode it is not possible for the unit to enter Sleep Mode See the SL command for details COMMAND DESCRIPTIONS 7 10 7 1 7 User defined commands The user defined commands enable you to define custom commands All measurement options are available Any combination of measurements and text can be specifi
37. command 0100PO Typical read response 0001PO 0 COMMAND DESCRIPTIONS 7 28 7 2 8 Time reference stamp command NOTE The time reference stamp feature is available in firmware version 4 10 or later A time reference stamp can be appended to pressure and temperature measurement data to help you determine when the pressure or period measurement was taken relative to the transmission of the measurement command response The time reference value reported is the time interval between the midpoint of the integration period and the start of the transmission of the first ASCII character of the response data TS Enables and disables the time reference stamp feature The TS command affects the following measurement commands P1 P2 P3 P4 P5 P6 P7 Q1 Q2 Q3 Q4 O5 and Q6 Action When is enabled a comma delimited time reference stamp is appended to the measurement values returned by the aforementioned commands expressed in microseconds Range 0 Time reference stamp disabled 1 Time reference stamp enabled Typical set command 0100EW 0100TS 1 Typical set response 0001TS 1 Typical read command O100TS Typical read response 0001TS 1 The time reference value reported is the time interval between the midpoint of the integration period and the start of the transmission of the first ASCII character of the response data expressed in microseconds DL 1 pads the time reference stamp value to 9 digits NOTE The time reference
38. command 0100SN Typical read response 0001SN 12345 Read the firmware version number Action The VR parameter contains the device firmware version number VR is a read only command Typical read command 0100VR Typical read response 0001 VR R4 01 Read the firmware checksum COMMAND DESCRIPTIONS 7 27 MN PF PO Action The CF parameter contains the firmware checksum The value of CF is always 4 characters CF is a read only command Typical read command 0100CF Typical read response 0001CF A1B2 Read the model number Action The MN parameter contains the device model number as a text string The value of MN always contains 16 characters If the model number is less than 16 characters the string will be padded with trailing spaces to a length of 16 characters MN is a read only command Typical read command 0100MN Typical read response 0001MN 6030A Read the full scale pressure value Action The PF parameter contains the full scale pressure value in the current pressure units Ifthe units are changed the value of PF is scaled accordingly PF is a read only command Typical read command 0100PF Typical read response 0001PF 30 00000 Read the pressure transducer type Action The PO parameter contains the pressure transducer type PO is a read only command Table 9 PO Command Return Values PO value Transducer type 0 Absolute 1 Gauge 2 Differential Typical read
39. d to F if TU 1 7 2 4 Power management commands DIGIQUARTZ intelligent devices can be commanded to enter a reduced power Sleep Mode during periods of serial port inactivity The unit awakens 0 6 seconds after a single serial character is received on either port Since the unit is asleep when the wake up character is received that character will be lost and will not be interpreted as being part of a command It is therefore necessary to send a character and wait at least 0 6 seconds before sending a command to an intelligent device that is in Sleep Mode CAUTION Power management features are not available if MD is set for continuous pressure data output or display data output or Fetch Mode is enabled FM 1 COMMAND DESCRIPTIONS 7 19 SL Set or read the sleep mode enable state Action Allows sleep mode to be enabled or disabled When sleep mode is enabled the device will enter sleep mode when both serial ports have received no characters for the number of seconds specified by the value of ST When sleep mode is disabled the device cannot enter sleep mode Range 0 sleep mode disabled 1 sleep mode enabled Default 0 Typical set command 0100EW 0100SL 1 Typical set response 0001SL 1 Typical read command 0100SL Typical read response 0001SL 1 NOTE If MD is set for continuous pressure data output or display data output or Fetch Mode is enabled FM 1 the device will never enter sleep
40. depth sensors to integrate the temperature and pressure signals simultaneously Simultaneous Integration results in faster data acquisition without sacrificing measurement resolution Simultaneous Integration is available in all DIGIQUARTZ transmitters and depth sensors with firmware version R4 00 and later For backward compatibility with earlier units a Sequential Integration UNIVERSAL FEATURES AND FUNCTIONS 4 2 Simulation mode is also available The Sequential Integration Simulation uses Simultaneous Integration but produces measurement timing similar to units with firmware versions prior to R4 00 Figure 1 illustrates the differences between Sequential Integration Simultaneous Integration and Sequential Integration Simulation Refer to Section 7 1 6 for more information about Sequential and Simultaneous Integration 208ms 10 ms 180ms SEQUENTIAL INTEGRATION TEMP E P1 100 T1 100 PRESSURE ae SIMULTANEOUS INTEGRATION TEMP Ol 0 Pi Ti 1 ee TER PRESSURE 20 ms gt SEQUENTIAL INTEGRATION TEMP SIMULATION 0l 1 P1 100 T1 100 PRESSURE Figure 1 Timing Diagram Simultaneous vs Sequential Integration 4 4 Sampling types SINGLE MEASUREMENT SAMPLING Single measurement sampling commands output a single measurement value each time the command is received CONTINUOUS MEASUREMENT SAMPLING Continuous measurement sampling commands repeatedly output measurement data until commanded to stop
41. e Action When SU 1 an underscore separates the measurement data from the address header and the optional engineering units suffix When SU 0 no underscore separators appear Examples 000114 71234 SU 0 0001_14 71234 SU 1 0001_14 71234 psia SU 1 US 1 Range 0 or 1 Default 0 Typical set command 0100EW 0100SU 1 Typical set response 0001SU 1 Typical read command 0100SU Typical read response 0001SU 1 ZI Set or read the taring indication parameter value Action When ZI 1 an T is appended to pressure measurement values when taring is in effect When ZI 0 no taring indication appears whether taring is in effect or not Examples Range 0 or 1 Default 0 Typical set command Typical set response Typical read command Typical read response COMMAND DESCRIPTIONS 000114 71234 ZI 0 000114 71234T ZI 1 0001_14 71234T ZI 1 SU 1 000114 71234Tpsia ZI 1 US 1 0001_14 71234T psia ZI 1 US 1 SU 1 0100EW 0100ZI 1 0001ZI 1 0100ZI 0001ZI 1 7 25 DL Set or read the fixed field data format parameter Action When DL 1 measurement data is formatted in a fixed field format When DL 0 measurement data is given in the standard format The fixed field format is specified as follows AAAASDDDDDDDDDD where the asterisk character A destination and source address characters S sign of pressure data either or D numeric representation of pressure data eit
42. e save pressure value and await DB command Typical command 0100P5 Typical response No response until DB command is received Sample and hold one pressure period measurement in microseconds Action Measure pressure period save pressure period value and await DB command Typical command 0100P6 Typical response No response until DB command is received Sample and hold one temperature measurement in selected engineering units Action Measure temperature period calculate temperature save temperature value and await DB command Typical command 0100Q5 Typical response No response until DB command is received COMMAND DESCRIPTIONS 7 2 06 DB DS Sample and hold one temperature period measurement in microseconds Action Measure temperature period save temperature period value and await DB command Typical command 0100Q6 Typical response No response until DB command is received Dump Buffer Send held measurement values Action If a measurement value is being held send it otherwise do nothing Typical command 0100DB Typical response 000114 12345 Value 14 12345 Dump Sequential Send held measurement values Action Similar to DB command except it guarantees that the responses are received in sequential order from multiple transducers on an RS 232 serial loop network Typical Command 9900DS Typical response 000114 576 First transmitter 000214 577 Second transmitter 9
43. e connectors 14 4 1 Power Module15 pin female high density D sub PIN SIGNAL 1 Not used 2 RS 232 TX 3 RS 232 RX 4 Not used 5 Power signal ground 6 Not used 7 Not used 8 Not used 9 Power consult SCD 10 Not used 11 Not used 12 RS 485 RX 13 RS 485 RX 14 RS 485 TX 15 RS 485 TX Figure 10 DB15HD F 6671 003 Power Module Connector Pinout CONNECTOR DIAGRAMS 14 6 14 4 2 Power Module 9 pin female D sub PIN SIGNAL Not used RS 232 TX RS 232 RX Not used Power signal ground Not used Not used COIN DIN BIW N Re Not used O Power consult SCD Figure 11 DB9 F 6671 003 Power Module Connector Pinout CONNECTOR DIAGRAMS 14 7 14 5 PC RS 232 port 9 pin male D sub connector PIN PC RS 232 SIGNAL 1 Data Carrier detect DCD 2 RS 232 RX 3 RS 232 TX 4 Data Terminal Ready DTR 5 Signal ground 6 Data Set Ready DSR 7 Request To Send RTS 8 Clear To Send CTS 9 Ring Indicator RI Figure 12 DB9 M PC RS 232 Connector Pinout CONNECTOR DIAGRAMS 14 8 15 Serial Wiring Diagrams The diagrams in this section show the various ways in which DIGIQUARTZ Intelligent devices can be connected to RS 232 and RS 485 serial hosts and the Model 715 display The pin numbers given are for DIGIQUARTZ Intelligent devices wit
44. ed and measurement values can be formatted per your specifications User defined commands consist of an output mask command to define the command behavior and an associated command to execute the output mask Three independent user defined commands are available To use a user defined command the output mask must be defined using the OM command The output mask typically contains some combination of command codes text strings and numeric format specifiers each separated by acomma The OF command is used to execute the command defined by OM COMMAND CODES Command codes are used in the output mask to produce measurement or text output when executed The available command codes are listed in Table 1 below Table 1 Command Codes for User Defined Commands Command Description Format Code Specifier P Pressure Y MINP Minimum pressure Y MAXP Maximum pressure Y ST Sensor temperature Y PPER Pressure period Y TPER Temperature period Y TV Tare value N PU Pressure unit N TU Sensor temperature unit N UA Destination ID N HA Source ID N CR Carriage return N LF Line feed N CRLF Carriage return line feed N STAR or S Asterisk N RESET Set mask to default must be used alone N HEAD or H Same as STAR HA UA N END or E Same as CR LF N SPACE or SP Space character N NOTE Command codes can be upper or lower case COMMAND DESCRIPTIONS 7 11 NOTE To work with
45. ed by the host in response to a global command includes the command itself followed by the individual responses from all devices on the network e Sleeping devices on a serial loop network must be awakened individually and in sequence by sending a complete command to each device starting with the first device Keep in mind that a serial loop network will not be fully operational unless all devices on the network are awake since response data will not be resent by sleeping devices downstream e DIGIQUARTZ Interactive software DQI is not capable of waking multiple sleeping devices on a serial loop network If you intend to use DQI to communicate with units on a serial loop network please ensure that all devices have the sleep mode disabled 11 5 Other networking methods Multiple serial ports PC expansion boards are available which provide up to 32 individual RS 232 serial ports Using such a board it would be possible to design a system whereby each Intelligent device would be connected to the serial host via its own RS 232 port This type of a system would ensure that any communications port cable or transmitter failure would not affect the rest of the system Relay Multiplexer System For high reliability applications with a large number of transmitters it may be desirable to use a custom relay multiplexer as a switching hub to select separate data lines running out to the individual transmitters or serial loops in the system
46. een nes meer 7 28 OI Sequential Simultaneous integration mode 7 9 OM User defined command definition s cececeee ee eee 7 13 OP Overpressure alarm setpoint 0 0 ccececeeceeceeeeeeeeeeeenes 7 23 PA Pressure adder nu ine eleerasase id anctin TE S 7 36 PF Full scale pressure nce nass anna 7 28 PI Pressure integration time 0 ecece eee ee eee eee nennen 7 8 PL Pressure limit Overpressure setpoint for Model 715 display 7 32 PM Pressure m ltiplier ressas eyes 7 37 PO Pressure transducer type 2222ssesseseseeseeeeeen nennen nenn nenn 7 28 PR Pressure resolution zeiten 7 9 PS Temperature measurement interval used w P7 command 7 5 SL Sleep mode enable disable 4cs ec ee teeta enees 7 20 SN Serial NUMBER 22 02 een 7 27 ST Sleep timeouts 2 6 eect te detects cane ls date wake teols eigenen ade 7 20 SU Data separation character enable disable 7 25 T1 Ti goeffcient inene a innen 7 38 T2 T2 coefficient u sea a e e 7 38 T3 T3 coefficient ana seele een acenaaedeces 7 38 T4 T4 c eflicient a enden 7 38 T5 1 3 C0eflicient ana ten nl tac eE 7 38 TC Timebase correction factor ccececeeceecee eee eeeeeeaeenees 7 37 TI Temperature integration time 0 c cee eee ee ne eeee nena eee es 7 8 TR Temperature resolution ccece ec eceec eee ene eee eaeneenes 7 9 TU Temperature unit C F
47. ency counter Like the frequency counter a signal must be integrated for a specified period of time to measure its period The time over which the signal is integrated determines the resolution of the measurement Longer integration times increase resolution but reduce the sampling rate Conversely shorter integration times decrease resolution but increase the sampling rate The integration mode has a significant effect on sampling rate The effective sampling rate of Simultaneous Integration OI 0 is roughly double that of Sequential Integration Simulation OI 1 for a given PI or PR setting until the maximum serial bandwidth is reached Note that the relationship between integration time and pressure resolution is not affected by the integration mode Please refer to Sections 4 3 and 7 1 6 for more information about Sequential Integration and Simultaneous Integration Simulation Another factor that influences sampling rate is the serial baud rate For short integration times faster baud rates enable faster sampling As integration times increase the benefit of faster baud rates quickly diminishes Table 14 illustrates the relationship between integration time resolution and sampling rate for the P4 command in Simultaneous Integration and Sequential Integration Simulation modes at various baud rates RESOLUTION INTEGRATION TIME AND SAMPLING RATE 9 1 P4 Command Continuous Pressure Output Table 14 Relationship of Integration
48. ending the command to the global address Refer to Sections 6 3 6 4 and 7 6 for details 4 11 Differences between the RS 232 and RS 485 ports Generally DIGIQUARTZ Intelligent devices respond identically to commands received on either port with the following exceptions Global commands received by the RS 232 port are re transmitted This enables a global command to be relayed to each device in an RS 232 serial loop network Refer to Section 11 4 for more information about RS 232 serial loop networking Commands received by the RS 232 port that are addressed for other devices are re transmitted This behavior is necessary to support RS 232 serial loop networking Refer to Section 11 4 for more information about RS 232 serial loop networking Global commands received by the RS 485 port never generate a response This prevents the data collision that would occur if all devices on a multi drop network were to respond simultaneously Refer to Section 11 3 for details 4 12 Calibration DIGIQUARTZ Intelligent devices are shipped fully calibrated Calibration data are shipped with the unit in printed form and are stored within the device in non volatile memory These values should not be modified unless it is absolutely necessary to do so and then only with extreme caution See Section 7 5 for details UNIVERSAL FEATURES AND FUNCTIONS 4 6 4 13 Unit identification DIGIQUARTZ Intelligent devices are shipped with several unit
49. er cycle Therefore the device will perform the specified serial data output function whenever power is applied Default 0 Typical set command 0100EW 0100MD 1 Typical set response 0001MD 1 Typical read command 0100MD Typical read response 0001MD 1 CAUTION Do not configure any device on a 2 wire RS 485 network for continuous pressure data output from the RS 485 port on power up MD 2 or MD 3 DO 1 If you do this it is unlikely that you will be able to reconfigure the unit over the network since any command is likely to collide with the pressure data being continuously sent To recover you will need to remove the device from the network and reconfigure it individually via the RS 232 port COMMAND DESCRIPTIONS 7 34 NOTE When MD is set to a non zero value the specified serial data output mode will be preempted under the following conditions e When the intelligent device is running in a continuous pressure data output mode continuous data output is suspended when a measurement command is received Continuous data output resumes when the measurement command is complete e When the intelligent device is running in a display data output mode display data output is suspended when a period measurement command P1 P2 P6 Q1 Q2 Q6 is received Display data output resumes when the period measurement command is complete e Continuous pressure data output is suspended when a continuous measurement comm
50. essesseneeseeeeneen 7 2 P6 Sample and hold pressure period ceceeceeeeeeneeeees 7 2 P7 Continuously measure pressure at maximum rate 7 5 Q1 Measure single temperature period 224ssesseseeseeeeeen 7 1 Q2 Continuously measure temperature period 442 7 6 Q3 Measure single temperature 2essesessessesesseeseesene rennen 7 2 Q4 Continuously measure temperature sssssesssrrrrsrerse e 7 6 Q5 Sample and hold temperature c esenee essen 7 2 Q6 Sample and hold temperature period rennen 7 3 PARAMETERS PAGE C1 Cl COEHICIEI Ty so msnen een a AAS 7 38 C2 CR coefficiente hee aa e raten oana a 7 38 C3 C3 COCHMICIEM tsa neni dc aee a E paguretaasens aaa beast 7 38 CF Firmware checksum 222422cssessssesesesennensnese nenne 7 27 D1 DCOCHICI ENE a euer 7 38 D2 D2 CHEFHCIEN A en een een Saude 7 38 DL Data logger fixed field format mode 2 7 26 DM Display moden ln ai ae 7 30 DO Display output port essesessessesesseseneeneneennenen nennen nee 7 31 DP Decimal point Decimal places in displayed pressure value 7 31 FM Fetch mode enable disable 0 0 cece eeec eee eee ne ne entree es 7 10 IA IIR mode cutoff frequency ccsesseseesesseseenenseesene nen 8 2 COMMAND AND PARAMETER REFERENCE 19 1 PARAMETERS CONTINUED PAGE MD Serial data modern u nn ei ar 7 34 MN Model number una
51. ether you choose RS 485 multi drop or RS 232 serial loop networking If your network includes older Intelligent devices that support RS 232 only set the older devices to PT N to assure compatibility with newer devices Verify proper operation of each Intelligent device before installing it in a network Set all Intelligent devices to the same baud rate before installing them in a network Once your network is up and running you can change the baud rate to any supported value Each Intelligent device on the network needs to be set to a unique ID Jf you are setting up an RS 232 serial loop network you can automatically set all devices to a unique ID value by issuing a single ID command If you are setting up an RS 485 multi drop network you must isolate each device from the network and set the ID of each device individually See Section 7 2 2 for more information about the ID command 11 2 Choosing a networking type Both types of networking have unique benefits as described below Carefully consider your system requirements before selecting a networking type Benefits of RS 485 multi drop networking RS 485 transmission distance is up to 4 000 feet compared to 50 feet for RS 232 serial loop networking Improved data integrity in electrically noisy environments as compared to RS 232 serial loop networks Can take synchronized measurements from any or all devices on the network This is not possible with RS 232 ser
52. h 15 pin high density D subminiature connectors Refer to Section 14 for pin assignments of other connectors PC serial port pin numbers assume a typical 9 pin RS 232 port consult the documentation that came with your PC to verify your RS 232 port pin assignments 15 1 RS 232 wiring diagrams is POWER ADAPTER MODULE P N 6671 WALL MOUNT POWER SUPPLY P N 6024 001 P N 6024 002 220 9 PIN CABLE P N 6409 003 15 PIN CABLE P N 6409 00 tl A ee a Figure 13 RS 232 Wiring Diagram Using Optional RS232 RS485 Power Module Kit onp s S5 GND INTELLIGENT DEVICE Figure 14 Simple RS 232 Wiring Diagram SERIAL WIRING DIAGRAMS 15 1 15 2 RS 232 serial loop network wiring diagram NI T NI F T F ID N 98 MA INTELLIGENT INTELLIGENT INTELLIGENT DEVICE 1 DEVICE 2 DEVICE N 98 MAX Figure 15 RS 232 Serial Loop Network SERIAL WIRING DIAGRAMS 15 2 15 3 RS 485 wiring diagrams ND E Pin INTELLIGENT DEVICE Figure 16 2 wire RS 485 System Single Device 2282 ee ren ea RS 485 HOS a INTELLIGENT DEVICE Figure 17
53. her digits or a decimal point Examples 000114 71234 Pressure DL 0 0001 14 7123400 Pressure DL 1 000121 123 Temperature DL 0 0001 21 1230000 Temperature DL 1 Range Oor 1 Default 0 Typical set command 0100EW 0100DL 1 Typical set response 0001DL 1 Typical read command 0100DL Typical read response 0001DL 1 NOTE The format specification and examples shown above assume that the other formatting commands are disabled If other formatting commands are used in combination with DL a fixed field format will still result but the format specification will vary slightly from the one described above COMMAND DESCRIPTIONS 7 26 UM Set or read the user defined engineering units label parameter Action When UN 0 and US 1 the text value of UM is appended to pressure measurements Examples 000114 71234 UN 0 US 0 000114 71234user UN 0 US 1 UM user Range Any text up to four characters consisting of ASCII 32 to ASCII 127 Default user Typical set command 0100EW 0100UMS test Typical set response 0001UM test Typical read command 0100UM Typical read response 0001UM test 7 2 7 Unit identification commands The Unit Identification commands read various device specific parameters These commands are factory set and cannot be modified SN VR CF Read the serial number Action The SN parameter contains the device serial number SN is a read only command Typical read
54. ial loop networking due to the delays that occur as the measurement command propagates through the network NETWORKING MULTIPLE INTELLIGENT DEVICES 11 1 e Can wake up all sleeping devices with a single character Each device must be awakened individually on an RS 232 serial loop network e Improved system reliability It is less likely that a failure in a single unit will affect the entire network as compared to RS 232 serial loop networks Benefits of RS 232 serial loop networking e RS 232 serial loop networking is compatible with all standard PCs and most other control devices RS 485 may not be available or may require additional hardware depending on the serial host you have selected e Unique device IDs can be assigned to all devices on the network with a single command With an RS 485 multi drop network you must isolate each unit and assign its unique ID individually e Can directly communicate with up to 98 devices You can address up to 98 devices with RS 485 but you must use a repeater if you have more than 32 devices including the host on the network 11 3 RS 485 multi drop networking As shown in Section 11 2 RS 485 multi drop offers several significant benefits over RS 232 serial loop networking It is recommended that RS 485 multi drop networking be used whenever possible RS 485 multi drop networks can be wired as a 2 wire or 4 wire system DIGIQUARTZ Intelligent devices are compatible with either system Refe
55. ibility of the serial host to ensure that data collisions do not occur Normally this requires that the host wait an appropriate length of time for a response before sending another command Since multiple transmitters share common wiring in 2 wire RS 485 multi drop systems it is necessary that all devices on a network have the ability to disable their transmitters when not actively transmitting DIGIQUARTZ Intelligent devices perform this task automatically but the serial host must also enable its transmitter only when transmitting Some RS 485 devices particularly low cost RS 232 to RS 485 converters tend to leave their transmitters enabled for a period of time after RS 485 data has been transmitted If this time is sufficiently long some or all of the response data from a DIGIQUARTZ Intelligent device will not be received by the serial host since the host will still be in the transmit mode when the response is being sent If you plan to use such a device reliable two wire RS 485 communications may not be possible and you will need to use a 4 wire system instead 11 3 3 4 wire RS 485 multi drop networking Figure 19 in Section 15 4 illustrates a 4 wire RS 485 multi drop network consisting of a host and three DIGIQUARTZ Intelligent devices In this system there is no need for the host to disable its transmitter since it is connected to the receive lines of the Intelligent devices via a dedicated pair of wires NETWORKING MULTIPL
56. ical read response 0001XM 1 8 3 Configuring IIR Filter Mode SETTING RESOLUTION Resolution is a function of the cutoff frequency when operating in IIR mode The cutoff frequency is user selectable and is set by the IA command IA Set or read the cutoff frequency setting Range 0 16 Default 11 Typical set command Q100EW O100IA 11 Typical set response 00011A 11 Typical read command 0100IA Typical read response 00011A 11 See Table 12 for a list of ranges for IA values cutoff frequencies measurement resolution and the number of digits reported NANO RESOLUTION FEATURES AND FUNCTIONS 8 2 Table 12 IIR Filter Mode Typical Resolution Ranges ei 0 1 2 3 4 5 7 8 9 10 11 12 13 mi gt NN Cutoff frequency is the 3dB point of the low pass IIR filter Effective Time Interval is the recommended minimum time interval between measurements that ensures sampling up to the specified cutoff frequency The time interval is set using the PI command Period Resolution is the resolution of pressure and temperature period measurements Measurand Resolution is the resolution of pressure and temperature measurements Pressure and Temperature Digits is the total number of digits used to report pressure and temperature measurements Pressure and temperature period measurements contain one additional digit NANO RESOLUTION FEATURES AND FUNCTIONS 8 3 8 4 Configuring FIR Filter Mode SETTING
57. identification values stored in non volatile memory These read only values include e Serial and model numbers e Full scale pressure e Transducer type Refer to Section 7 2 7 for details 4 14 Model 715 Display DIGIQUARTZ Intelligent devices can be used with the Model 715 Display to display pressure temperature and user defined alphanumeric information The Model 715 can communicate with DIGIQUARTZ Intelligent devices via either RS 232 or RS 485 User defined alphanumeric display information can be stored in the DIGIQUARTZ Intelligent device or can be sent directly from the serial host to the Model 715 display Intelligent devices support several commands that control the Model 715 display Refer to Section 7 2 8 for details DIGIQUARTZ Intelligent devices with dual RS 232 and RS 485 ports are not compatible with the Model 710 display Older Intelligent devices with RS 232 only are not compatible with the Model 715 display UNIVERSAL FEATURES AND FUNCTIONS 4 7 5 Quick Start This section will help you to quickly connect your DIGIQUARTZ Intelligent device to the RS 232 serial port of a standard PC establish communications and take your first pressure measurements This process will be much simpler and easier if you have purchased the RS232 RS485 Power Module Kit 110V p n 1294 001 220V p n 1294 002 The kit includes the following items Power adapter module p n 6671 003 110 or 220 VAC wall power supply p n 6
58. ing is in effect is set to logic low when taring is not in effect Overpressure Output Indicates whether the most recent pressure measurement exceeds the user specified overpressure setpoint The overpressure output is set to logic high if overpressure setpoint is exceeded and is set to logic low otherwise See the OP command in Section 7 2 5 for more information Logic low lt 0 1 VDC Logic high 3 3 VDC Maximum output drive current 300A microamps T O LINES 13 1 14 Connector Diagrams This section provides pin assignment diagrams for DIGIQUARTZ Intelligent devices and standard PCs PC pin assignments are typical if in doubt consult the hardware manual that came with your PC NOTE All connector diagrams are as viewed from the mating end 14 1 Intelligent transmitters 15 pin male high density D sub DBISM HD PIN INTELLIGENT TRANSMITTER SIGNAL 1 Chassis ground or Not used consult SCD 2 RS 232 TX 3 RS 232 RX 4 Not used 5 Power signal ground 6 Tare output 7 Tare switch input 8 Overpressure output 9 Power consult SCD 10 Not used 11 Not used 12 RS 485 RX 13 RS 485 RX 14 RS 485 TX 15 RS 485 TX Figure 5 DB15HD M Transmitter Connector Pinout CONNECTOR DIAGRAMS 14 1 14 2 Intelligent Depth Sensor connectors 14 2 1 Intelligent absolute depth sensors Burton 5507 1508 000X BURTON 5507 1508 000 PIN DEPTH S
59. ing unit See the SU command for details Tare Indicator Adds an uppercase T character to pressure measurement data to indicate a tared value See the ZI command for details Data Logger Format Converts measurement data to a predictable fixed length and fixed position format to simplify parsing by data loggers and other programmable serial hosts See the DL command for details User Defined Unit Label Lets you define the 4 character unit label to be used when the user defined pressure unit is selected See the UM command for details UNIVERSAL FEATURES AND FUNCTIONS 4 5 4 10 RS 232 and RS 485 serial communications DIGIQUARTZ Intelligent devices are equipped with both RS 232 and RS 485 serial ports Commands can be sent to either port Response data if any will be output from the port that received the command Common baud rates between 300 and 115 200 baud are supported The serial protocol is fixed at 8 data bits no parity and 1 stop bit Up to 98 units and an RS 232 serial host can be interconnected to form a serial loop network Refer to Sections 7 2 2 11 4 and 15 for details Additionally up to 98 units and an RS 485 serial host can be interconnected to form a 2 wire or 4 wire RS 485 multi drop network Refer to Sections 7 2 2 11 3 and 15 for details You communicate with a specific DIGIQUARTZ Intelligent device by sending commands to its ID number You can also send certain commands to all devices on a network by s
60. inimized by keeping the transmitter pressure port and the pressure source at the same elevation or by making an offset correction to compensate for the pressure head 3 1 Pressure ports and buffer tubes DIGIQUARTZ Intelligent Transmitters typically include a nylon or stainless steel buffer tube The buffer tube is an integral part of the mechanical shock protection system of the transmitter Parker A Lok or equivalent nut and ferrule fittings are used on most Digiquartz Intelligent Transmitters The Series 1000 devices use the 1 8 OD configuration Two 7 16 wrenches are required when making or breaking any 1 8 inch pressure fitting The first wrench is used to stabilize the stationary fitting and the second wrench is used to turn the other fitting The Series 9000 transmitters use a 1 4 Modified HIP or equivalent fitting A 5 8 wrench and 3 4 wrench are required to make and break these connections CAUTION It is recommended that pressure fittings are installed finger tight then tightened an additional 3 4 turn to complete the pressure seal WARNING Avoid making connections directly to the transmitter pressure fitting Make connections to the buffer tube fitting wherever possible If the transmitter pressure fitting becomes flared stripped or damaged it will be necessary to return the unit to Paroscientific for repairs IWARNING Do not remove the buffer tube It is an integral part
61. is a Windows data logging program With DQA you can log time stamped measurement data from up to 8 DIGIQUARTZ Intelligent devices Measurement data can also be displayed in real time in an automatically scaled graph Data is stored to a text file in a format that can easily be imported into popular PC programs such as Microsoft Word or Excel Refer to the help function in DQA for more information GETTING STARTED 6 4 7 Command Descriptions 7 1 Measurement commands The following commands are used to initiate measurements control measurement integration times set measurement modes and work with user defined commands For additional commands associated with nano resolution signal processing please refer to Section 8 7 1 1 Single measurement commands The following commands are used to initiate single measurements They return the resulting measurement value as soon as it is available when in Trigger Mode or immediately if in Fetch Mode Refer to Section 7 1 6 for more information about Trigger Mode and Fetch Mode P1 P3 Q1 Sample and send one pressure period measurement in microseconds Action Measure pressure period send pressure period value and await next command Typical command 0100P1 Typical response 000128 123456 Value 28 123456 Sample and send one pressure measurement in selected engineering units Action Measure temperature period measure pressure period calculate temperature compensated
62. issing quote character 03 Output mask too long 04 RESET mixed with other command codes 05 Bad format specifier Executes the associated user defined command output mask OF1 OF2 and OF3 execute output masks defined by OM1 OM2 and OM3 respectively The number is optional if no number is specified OF1 is assumed Adding an R to the end of the command example OF1R causes the command to execute continuously until another command is received or power is lost Typical command 01000F Typical response Pressure 14 12345 The OF command processes command codes in the order that they appear in the output mask The output for each code is sent as it is processed COMMAND DESCRIPTIONS 7 13 EXAMPLES The following examples illustrate various output mask possibilities and the resulting serial responses Table 4 Single Response OM OF Examples OM Output Mask OF Command Result OM STAR HA UA P psi 000114 5678 psi OM HEAD P END 000114 5678 lt CRLF gt OM HEAD 2 2P END 000114 57 lt CRLF gt OM Min MINP SPACE Max MAXP Min 14 5678 Max 14 5687 Table 5 Continuous Response OM OFR Examples OM Output Mask OFR Command Result OM STAR HA UA P psi CRLF 000114 5678 psi lt CRLF gt 000114 5678 psi lt CRLF gt 000114 5678 psi lt CRLF gt 7 2 Configuration commands 7 2 1 Enable write command When setting virtually all parameter va
63. it is intended for use with DIGIQUARTZ Intelligent transmitters and is not compatible with Intelligent depth sensor products 6 3 Communications DIGIQUARTZ Intelligent devices are initially configured for RS232 RS485 communications at 9 600 baud The serial protocol is fixed at 8 data bits no parity and 1 stop bit Each Intelligent device has an ID number and will only respond to commands sent to its ID number or 99 ID number 99 is reserved as a global address which can be used to send a single command to multiple devices at once The ID number is initially configured to 01 but you can set the ID number to any value between 01 and 98 It is recommended that DIGIQUARTZ Interactive 2 0 DQI 2 0 software be used to establish initial communications with your transmitter Refer to the DIGIQUARTZ CD library and Section 6 6 for details GETTING STARTED 6 1 You may also use any terminal program that is configured for the proper baud rate and serial protocol Your terminal program must also send a line feed character ASCH 10 with each carriage return 6 4 Command basics DIGIQUARTZ Intelligent devices are controlled by serial ASCII command strings The following basic tasks can be accomplished by sending the appropriate command e Take a measurement e Perform a control function such as locking the baud rate e Set an operating parameter such as integration time e Read the value of an operating parameter When setting
64. it is used for the integer portion of the pressure period value leaving N 1 digits for the fractional portion 8 6 Controlling the Numeric Format The XN command sets the number of significant digits used to report period pressure and temperature measurement values The XN command overrides the default numeric format XN Set or read the number of significant digits Range 0 13 Default 0 Typical set command 0100EW 0100XN 10 Typical set response 0001XN 10 Typical read command 0100XN Typical read response 0001XN 10 When XN is set to 0 the default numeric formats are used When non zero XN specifies the number of significant digits used to report period pressure and temperature measurement values With the exception of the total number of digits all default format characteristics apply The integer portion is never expressed with fewer digits than required regardless of the value of XN The fractional portion is rounded or padded with zeros as required to fit the specified format The XN command works with Standard IIR and FIR resolution modes NANO RESOLUTION FEATURES AND FUNCTIONS 8 6 9 Resolution Integration Time and Sampling Rate The outputs from DIGIQUARTZ pressure transducers are two square wave signals whose period is proportional to applied pressure and internal transducer temperature The Intelligent electronics measures these signals using a technique similar to that of a common laboratory frequ
65. lue of PR is changed PI is automatically updated to reflect the equivalent pressure integration time Set or read temperature measurement integration time Units None Range 1 to 65535 integer values only Default 952 Typical set command 0100EW 0100TR 800 Typical set response 0001TR 800 Typical read command O100TR Typical read response 0001TR 800 NOTE Changing TR has no effect on PR NOTE Whenever the value of TR is changed II is automatically updated to reflect the equivalent temperature integration time Measurement mode commands Select Simultaneous Integration or Sequential Integration Simulation Action The OI command is used to select Simultaneous Integration or Sequential Integration Simulation When Simultaneous Integration is selected the pressure and temperature periods are integrated simultaneously resulting in increased data rates COMMAND DESCRIPTIONS 7 9 without sacrificing measurement resolution When Sequential Integration Simulation is selected the pressure and temperature periods are still integrated simultaneously but the measurement timing is similar to units that only support Sequential Integration firmware versions prior to R4 00 Values 0 Simultaneous Integration 1 Sequential Integration Simulation Default 1 Typical set command 0100EW 01000I 1 Typical set response 00010I 1 Typical read command 01000I Typical read response 00010I 1 NOTE When Simultaneous Integr
66. lues you must precede the parameter set command with an EW Enable Write command Parameter set commands will be ignored unless they are preceded with an EW command EW Enables the next parameter set command to write a new value into non volatile memory You can issue EW as a separate command by terminating it with a carriage return line feed or you can string the EW and parameter set commands together as shown below Typical syntax Q100EW 0100TR 800 Alternate syntax 0100EW 0100TR 800 COMMAND DESCRIPTIONS 7 14 7 2 2 Communications commands The following commands are used to configure DIGIQUARTZ Intelligent devices for serial communications BR Set the RS 232 and RS 485 baud rate Each individual port can be independently set to its own baud rate Action The BR command is used to set the baud rate of the RS 232 and RS 485 ports The BR command must be addressed to 99 the global ID This ensures that all units on a network are set to the same baud rate It is not possible to read the baud rate value There are three options for the BR command BR sets the baud rate of both ports BR1 sets the baud rate of the RS 232 port only and does not affect the RS 485 port BR2 sets the baud rate of the RS 485 port only and does not affect the RS 232 port The BR command is unique in that it does not need to be preceded by an EW command Values 300 600 1200 4800 9600 19200 38400 57600 and 115200 Default 9600 Typic
67. mode regardless of the values of SL or ST ST Set or read the sleep mode timeout length Action When SL 1 the device enters sleep mode if both serial ports have received no characters for ST seconds Units Seconds Range 5 to 255 integer values only Default 10 Typical set command 0100EW 0100ST 5 Typical set response 0001ST 5 Typical read command 0100ST Typical read response 0001ST 5 7 2 5 Tare and overpressure commands Taring is the process of subtracting a specified value from pressure measurements You may use a measured pressure as the tare value or you may specify any desired value Taring can be enabled disabled and locked out through the use of serial commands Taring can also be controlled and monitored using I O lines please refer to Section 13 for more information Pressure measurement data can be formatted to include an indication when taring is in effect Refer to the ZI command for more information COMMAND DESCRIPTIONS 7 20 The overpressure command can be used to specify the overpressure alarm setpoint When the overpressure setpoint is exceeded the overpressure I O line changes from logic low 0 VDC to logic high 3 3 VDC Refer to Section 13 for more information ZS Set or read the tare state parameter value Action The three states of ZS are as follows ZS 0 Taring function is off ZS 1 Taring has been requested but is not yet in effect ZS 2 Taring is in effect ZS is set to 0 on powe
68. more information regarding PA and PM CAUTION Use extreme caution when modifying PA or PM because they directly affect calibration Inaccurate values will result in inaccurate pressure measurements ZERO AND SPAN ADJUSTMENTS 18 1 This page intentionally left blank ZERO AND SPAN ADJUSTMENTS 19 Command and Parameter Reference COMMANDS PAGE BL Lock baud Taten ana ae a ee Heu eten 7 16 BR Set baud Taler acer teaser 7 15 CS Check stackt s c22 43 nintccnasdaciginiudeeessneiaidlaatememied oR a R 7 36 DB Dump buffeter aae sided usd iauedyd senewesdiasesateey 7 3 DS Dump sequential seesi bide sepenaeesdedidedece aE E Posey ere 7 3 DT Display text on second line of Model 715 7 32 EW Enable write vin el Bess 7 14 ID Seb Di ine de ace ie an N ee 7 17 M1 Minimum pressure valuc e ccc ce eee e cence e ences eneeenens 7 7 M3 Maximum pressure value ecceceeeec eee eeeee eee eeee nenn 7 7 MR Reset minimum and maximum pressure values 7 7 OF Execute user defined command S nenne 7 13 P1 Measure single pressure period cceceeeeeeee ene eaeeeens 7 1 P2 Continuously measure pressure period ceceeee eee ees 7 4 P3 Measure single presSUre 0 ccecece eee eee eee ee eee nenne 7 1 P4 Continuously measure pressure cce cece eee ee ee nennen 7 4 P5 Sample and hold pressure 22c2csecs
69. mperature signal period is measured A temperature value is calculated using the temperature period and the calibration coefficients 3 The temperature value is output PRESSURE AND TEMPERATURE PERIOD MEASUREMENTS Period measurements are used mainly for calibration and diagnostic purposes but may be useful in high speed sampling applications When a period measurement is made the following sequence occurs 1 The pressure or temperature signal period is measured 2 The period value is output Refer to Section 7 1 for detailed measurement command descriptions 4 3 Measurement modes TRIGGER MODE VS FETCH MODE In Trigger Mode measurements are initiated when a measurement command is received Data is output when the new measurement is complete This is the mode in which DIGIQUARTZ intelligent devices have traditionally operated In Fetch Mode measurements are continuously taken in the background When a measurement command is received the most recently acquired measurement value is immediately output Refer to Section 7 1 6 for more information SEQUENTIAL INTEGRATION VS SIMULTANEOUS INTEGRATION Until recently DIGIQUARTZ intelligent devices used a Sequential Integration scheme for measuring the sensor s pressure and temperature signals With Sequential Integration the temperature period is integrated first followed by the pressure period Recent advances in microprocessor technology have enabled DIGIQUARTZ transmitters and
70. ms for Intelligent devices Model 715 Display power adapter module and PC RS 232 serial port Wiring diagrams for simple RS232 simple RS485 RS232 serial loop network and RS485 multi drop network systems Troubleshooting tips Descriptions of the formulas used by DIGIQUARTZ Intelligent devices to calculate pressure and temperature Information about zero and span calibration adjustments A quick reference list of the commands supported by DIGIQUARTZ Intelligent devices INTRODUCTION 1 3 2 Hardware Descriptions 2 1 Intelligent Transmitters Series 1000 6000 9000 DIGIQUARTZ Intelligent Transmitters consist of a pressure transducer and a serial interface board in an integral package Commands are sent and measurement data are received via one RS 232 and one RS 485 serial port Measurement data are provided directly in user selectable engineering units with a typical total accuracy of 0 01 or better over a wide temperature range Pressure measurements are fully temperature compensated using a precision quartz crystal temperature sensor Each intelligent transmitter is preprogrammed with calibration coefficients for full plug in interchangeability 2 2 Intelligent Depth Sensors Series 8CDP 8CB DIGIQUARTZ Intelligent Depth Sensors consist of a pressure transducer and a serial interface board in a rugged waterproof package Commands are sent and measurement data are received via one RS 232 and one RS 485 serial port
71. mula Sn gt aT el a Sa 1 Where Sn smoothed temperature T measured temperature Sa 1 smoothed temperature of previous sample a 1 XT XT Set or read the number of temperature measurements to use for temperature smoothing in FIR Mode Range 1 100 Default 1 no smoothing Typical set command 0100EW 0100XT 10 Typical set response 0001XT 10 Typical read command 0100XT Typical read response 0001XT 10 8 5 Default Numeric Formats for IIR amp FIR Modes The default numeric formats used to report period pressure and temperature measurement values are as follows where N the number of significant digits shown in the resolution tables PRESSURE The sensor full scale pressure defines the number of digits reserved for the integer portion of the pressure value For example a 1000 psi full scale unit would have 4 digits reserved but not necessarily used for the integer portion of the pressure value leaving N 4 digits for the fractional portion TEMPERATURE Three digits are reserved but not necessarily used for the integer portion of the temperature value leaving N 3 digits for the fractional portion Negative temperature values include a sign but the numeric format is otherwise unaffected NANO RESOLUTION FEATURES AND FUNCTIONS 8 5 PRESSURE PERIOD Two digits are used for the integer portion of the pressure period value leaving N 2 digits for the fractional portion TEMPERATURE PERIOD One dig
72. n 0 001 second increments Pressure and temperature integration times can be set independently Measurements can be continuously taken in the background or can be initiated when a measurement command is received You can use these features to configure the intelligent device according to the data acquisition and resolution requirements of your application Refer to Section 0 for more information about integration time resolution and sampling rate 4 2 Measurement descriptions One or both of the transducer s pressure and temperature signals are sampled or integrated depending on the type of measurement requested PRESSURE MEASUREMENTS Pressure measurements are by far the most common Pressure measurements are fully temperature compensated and therefore require an internal temperature measurement When a pressure measurement is made the following sequence occurs 1 The temperature and pressure signal periods are measured simultaneously A temperature compensated pressure value is calculated using the pressure period temperature period and the calibration coefficients 3 The pressure value is output UNIVERSAL FEATURES AND FUNCTIONS 4 1 INTERNAL SENSOR TEMPERATURE MEASUREMENTS Internal sensor temperature is normally only used for temperature compensation of pressure but can be requested independently for diagnostic purposes When an internal sensor temperature measurement is made the following sequence occurs 1 The te
73. n Features amp Functions 8 1 8 1 Introduction 8 1 8 2 Enabling Nano Resolution 8 2 8 3 Configuring IIR Filter Mode 8 2 8 4 Configuring FIR Filter Mode 8 4 8 5 Default Numeric Formats for IIR amp FIR Modes 8 5 8 6 Controlling the Numeric Format 8 6 9 Resolution Integration Time and Sampling Rate 9 1 10 High Speed Sampling 10 1 11 Networking Multiple Intelligent Devices 11 1 11 1 Networking basics 11 1 11 2 Choosing a networking type 11 1 11 3 RS 485 multi drop networking 11 2 11 3 1 Characteristics unique to RS 485 multi drop networking 11 3 11 3 2 2 wire RS 485 multi drop networking 11 4 11 3 3 4 wire RS 485 multi drop networking 11 4 11 4 RS 232 serial loop networking 11 5 11 5 Other networking methods 11 6 iii 12 Using the Model 715 Display 12 1 Serial and power connections 12 2 Configuring an Intelligent device for use with the Model 715 12 3 Model 715 panel mounting instructions 13 I O Lines 14 Connector Diagrams 14 1 Intelligent transmitters 15 pin male high density D sub 14 2 Intelligent Depth Sensor connectors 14 2 1 Intelligent absolute depth sensors Burton 5507 1508 000X 14 2 2 Intelligent gauge depth sensors Burton 5999 0962 002 14 3 Model 715 connectors 14 3 1 Model 715 15 pin female high density D sub 14 3 2 Model 715 9 pin female D sub 14 4 Power Adapter Module connectors 14 4 1 Power Module15 pin female high density D sub 14 4 2 Power Module 9 pin female D sub 14 5
74. n the pressure display data Fewer decimal places will be displayed if the pressure resolution is not sufficient to provide the specified number of decimal places When DP is set to 6 the maximum number of decimal places is always displayed Range 0 to6 Default 6 Typical set command 0100EW 0100DP 6 Typical set response 0001DP 6 Typical read command 0100DP COMMAND DESCRIPTIONS 7 31 Typical read response 0001DP 6 DT Set the text to be displayed on line 2 ofthe Model 715 display when DM 4 Action DT allows a serial host such as a PC to send text to the second line of an optional Model 715 display when DM 4 The text sent with DT is not stored by the intelligent device it is simply transferred to the display Since the text sent with DT is not stored it cannot be queried and it is not necessary to precede DT with an EW command Range 16 characters maximum Any characters in the range of ASCII 32 to ASCH 127 are legal Typical set command 0100DT This is my text Typical set response 0001DT This is my text PL Read the display overpressure indication setpoint This setpoint is used to determine the pressure at which the intelligent device sends an overpressure indication to an optional Model 715 display Action PL is a factory set read only command The value of the PL parameter is used as the overpressure indication setpoint for the Model 715 display Typical read command 0100PL Typical read response
75. nse 0001TC 6666667 COMMAND DESCRIPTIONS 7 37 C1 Set or read the calibration coefficients Default Device specific Typical set command Typical set response Typical read command Typical read response COMMAND DESCRIPTIONS 0100EW 0100C1 228 1234 0001C1 228 1234 0100C1 0001C1 228 1234 7 6 Global commands Under certain circumstances it may be necessary to send a single command to multiple Intelligent devices on a serial loop or multi drop network The ID 99 has been reserved for such global addressing When an Intelligent device receives a legal command addressed to ID 99 the device reacts to that command regardless of its assigned ID value To support the unique requirements of RS 232 serial loop and RS 485 multi drop networking Intelligent devices react to global commands differently depending on which port received the command When a global command is received via RS 232 the global command is re transmitted before acting on the command This ensures that all devices on a serial loop will receive the global command When a global command is received via RS 485 the Intelligent device acts on the command but does not send a response This prevents multiple devices on a multi drop network from transmitting simultaneously which would result in data collisions and unintelligible data Some commands can only be sent with global addressing BR BL ID Global addressing is often used with sample and hold measuremen
76. nt data Add underscores to separate the measurement data from the rest of the serial output data string to improve readability Add trailing zeroes to the measurement data to create a fixed length data string to simplify parsing Formatting commands can be used separately or in any combination COMMAND DESCRIPTIONS 7 23 US Set or read the engineering units suffix parameter value Action When US 1 an engineering units label is appended to pressure and temperature measurement data When US 0 no engineering units label is appended Examples 000114 71234 Pressure measurement US 0 000114 71234psia Pressure measurement US 1 000121 123 000121 123C Temp measurement US 0 Temp measurement US 1 When US 1 a pressure unit label is appended to pressure measurement values according to the value of UN Table 7 Pressure Unit Suffixes UN value Label 0 Defined by UM 1 psia psig or psid 2 hPa 3 bar 4 kPa 5 MPa 6 inHg 7 mmHg 8 mH20 When US 1 a temperature unit label is appended to temperature measurement values according to the value of TU Table 8 Temperature Unit Suffixes TU value Label 0 C 1 F Range Oor 1 Default 0 Typical set command 0100EW 0100US 1 Typical set response 0001US 1 Typical read command 0100US Typical read response 0001US 1 COMMAND DESCRIPTIONS 7 24 SU Set or read the underscore separator parameter valu
77. of the mechanical shock protection system of the transmitter For additional information see the application note The Use and Handling of Buffer Tubes at www paroscientific com INSTALLATION 3 1 3 2 Oilfilled vs non oil filled units OIL FILLED TRANSMITTERS Transmitters that are to be used to measure liquid media pressures are oil filled at Paroscientific Transmitters that are oil filled should never be used in gas media applications Oil fill and bleed all pressure lines that are to be connected to an oil filled transmitter The same oil used to fill the transmitter should be used to fill the pressure lines consult the transmitter Specification Control Drawing for details CAUTION If your transmitter and buffer tube are oil filled do not pull a vacuum or apply pressurized gas to the unit Doing so could allow bubbles to form in the pressure lines and transmitter which will adversely affect the accuracy of the unit Pressure head effects result in zero offsets These effects are more pronounced when liquid filled pressure lines are being used These effects can be minimized by keeping the transmitter pressure port and the pressure source at the same elevation or by making an offset correction to compensate for the pressure head NON OIL FILLED TRANSMITTERS Non oil filled transmitters are intended for use in dry gas media applications and should never be used in liquid media applications WARNING
78. ons DM Display mode 0 Horizontal bar graph indicating measured pressure as a percentage of full scale pressure 1 Internal transducer temperature 2 User defined text defined by the UL parameter 3 No data is displayed on second line 4 User defined text received with the DT command 5 Current tare value 9 Minimum pressure since last reset 10 Maximum pressure since last reset COMMAND DESCRIPTIONS 7 30 Default 0 Typical set command 0100EW 0100DM 1 Typical set response 0001DM 1 Typical read command 0100DM Typical read response 0001DM 1 DO Set or read the display output port Action DO selects which serial port RS 232 or RS 485 will produce data for the Model 715 display The other serial port is normally used for communication with a host device such as a PC When DO 0 the RS 485 port is used for Model 715 display data when DO 1 the RS 232 port is used Range Oor 1 Default 0 Typical set command 0100EW 0100D0 1 Typical set response 0001DO 1 Typical read command 0100DO Typical read response 0001DO 1 NOTE When DO 0 continuous pressure measurement data produced by MD 2 and MD 3 is output on the RS 232 port When DO 1 continuous pressure measurement data produced by MD 2 and MD 3 is output on the RS 485 port DP Set or read the number of decimal places in the pressure data sent to the Model 715 display Action DP sets the maximum number of decimal places i
79. ou will be able to reconfigure the unit over the network since any command is likely to collide with the pressure data being continuously sent To recover you will need to remove the device from the network and reconfigure it individually via the RS 232 port NETWORKING MULTIPLE INTELLIGENT DEVICES 11 3 11 3 2 2 wire RS 485 multi drop networking DIGIQUARTZ Intelligent devices support half duplex master slave communications with serial hosts This means that the Intelligent device or slave will only transmit if it has been commanded to do so by the serial host or master This feature enables Intelligent devices to be used in 2 wire RS 485 systems where commands sent from the host and responses sent by the Intelligent device are sent on the same pair of wires Figure 18 in Section 15 4 illustrates a two wire RS 485 multi drop network consisting of a host and multiple DIGIQUARTZ Intelligent devices Notice that the TX and RX signals and the TX and RX signals are tied together at each device forming a 2 wire interface The 2 wire configuration can reduce wiring costs but the system designer must take precautions as described below to ensure reliable communications Data collisions occur on 2 wire RS 485 systems when two or more devices transmit simultaneously The result of a data collision is that both transmissions become unintelligible and are lost In a master slave network it is the respons
80. out Simultaneous Integration and Sequential Integration Simulation The measurement time interval seconds is equal to 1 Sampling Rate Hz Data in this table assume TI PI and version R5 00 or later PR is approximately equal to PI x 2 8 RESOLUTION INTEGRATION TIME AND SAMPLING RATE 9 2 10 High Speed Sampling Use one or more of the following techniques to increase sampling rate e Select Simultaneous Integration Refer to the OI command in Section 7 1 6 e Turn off any data being sent to the Model 715 display Refer to the MD command in Section 7 3 e Increase the baud rate Refer to the BR command in Section 7 2 2 e Reduce integration time Refer to PI TI PR and TR commands in Section 7 1 4 e Use a continuous pressure measurement command such as P4 See section 7 1 3 e Use the continuous pressure period command P2 and post process data to convert to pressure Refer to Section 17 for detailed information about converting period measurements into pressure values e Turn off the time reference stamp TS function Refer to Section 7 2 8 HIGH SPEED SAMPLING 10 1 11 Networking Multiple Intelligent Devices DIGIQUARTZ Intelligent devices support RS485 multi drop and RS 232 serial loop networking Both types of networking allow you to address up to 98 DIGIQUARTZ Intelligent devices from a single serial host 11 1 Networking basics When setting up a network the following points must be observed regardless of wh
81. p that will correlate data entries to the date time they were taken See Section 7 2 8 for further details 1 3 Conventions used in this manual The following conventions are used throughout this manual DIGIQUARTZ Intelligent Device Any Series 1000 6000 or 9000 Intelligent Transmitter or Series 8000 Intelligent Depth Sensor with dual RS 232 and RS 485 ports DIGIQUARTZ Intelligent Transmitter Any model from the Series 1000 6000 or 9000 product lines with dual RS 232 and RS 485 ports DIGIQUARTZ Intelligent Depth Sensor Any model from the Series 8000 product line with dual RS 232 and RS 485 ports CAUTION is used to draw your attention to a situation that may result in an undesirable outcome but will not damage an Intelligent device WARNING is used to draw your attention to a situation that may result in permanent damage to an Intelligent device INTRODUCTION 1 1 1 4 Safety precautions DIGIQUARTZ Pressure Transmitters and Depth Sensors are precision devices and as such they should be operated with a certain degree of care to ensure optimum performance WARNING It is recommended that the input pressure not exceed 1 2 times the rated full scale pressure Calibration can be affected if this limit is exceeded and permanent damage can result if the unit is sufficiently over pressured WARNING Excessive mechanical shock may cause irreparable damage Do not d
82. pressure send pressure value and await next command Typical command 0100P3 Typical response 000114 71234 Value 14 71234 Sample and send one temperature period measurement in microseconds Action Measure temperature period send temperature period value and await next command Typical command 0100Q1 Typical response 00015 1234567 Value 5 1234567 COMMAND DESCRIPTIONS 7 1 Q3 Sample and send one temperature measurement in selected engineering units Action Measure temperature period calculate temperature send temperature value and await next command Typical command 0100Q3 Typical response 000122 345 Value 22 34 7 1 2 Sample and hold measurement commands The following commands are used to initiate and send single sample and hold measurements Measurement values are held until the next command is received If the next command is a DB or DS command the measurement value is sent if it is any other command the measurement value is lost If a DB or DS command is received before the measurement command is complete the measurement value will be sent as soon as it is available NOTE Fetch Mode does not affect sample and hold measurement commands Refer to Section 7 1 6 for more information about Fetch Mode PS P6 Q5 Sample and hold one pressure measurement in selected engineering units Action Measure temperature period measure pressure period calculate temperature compensated pressur
83. r to Section 15 4 for multi drop wiring diagrams NETWORKING MULTIPLE INTELLIGENT DEVICES 11 2 11 3 1 Characteristics unique to RS 485 multi drop networking When setting up and operating an RS 485 multi drop network please be aware of the following e Up to 98 devices can be addressed on an RS 485 multi drop network but a maximum of 31 devices can be driven by any single transmitter If you intend to build a network that exceeds 31 DIGIQUARTZ Intelligent devices you must use one or more RS 485 repeaters to ensure that no device is driving more than a maximum of 31 receivers e CAUTION Do not attempt to set ID values over a multi drop network Doing so will set all devices on the network to the same ID value To set each device to a unique ID isolate each device from the network and individually set its ID value e CAUTION Do not send continuous measurement commands P2 P4 P7 Q2 Q4 to any device on a 2 wire multi drop network If you do this you may need to cycle power to stop the continuous transmission of measurement data since the command from the host to stop continuous measurement will likely collide with the measurement data coming from the device This is especially true if your device is set for a short integration time e CAUTION Do not configure any device on a 2 wire RS 485 network for continuous pressure data output from the RS 485 port on power up MD 2 or MD 3 DO 1 If you do this it is unlikely that y
84. r up If ZL 0 taring is not locked out taring can be requested by sending the ZS 1 command At the first pressure measurement following a tare request the following sequence occurs e The pressure value is stored in the ZV parameter e The value of ZS is set to 2 to indicate that taring is in effect e The value of ZV is subtracted from all subsequent pressure values until taring is turned off If taring is already in effect when a ZS 1 command is issued the sequence described above occurs and taring continues using a new value of ZV Taring can be turned off by issuing a ZS 0 command Range 0 to2 Default 0 Typical set command 0100EW 0100ZS 1 Typical set response 0001ZS 1 Typical read command 0100ZS Typical read response 0001ZS 1 COMMAND DESCRIPTIONS 7 21 ZV ZL Set or read the tare value Action Sets or queries the value that is subtracted from pressure measurements when taring is activated You can set ZV to any desired value when taring is in effect ZS 2 Note however that if taring is subsequently requested a new value will overwrite the ZV value you have set The value of ZV is set to 0 on power up Range 9999999 to 9999999 Default 0 Typical set command 0100EW 0100ZV 14 7123 Typical set response 0001ZV 14 7123 Typical read command 0100ZV Typical read response 0001ZV 14 7123 Set or read the tare lockout parameter value Action When ZL 0 ZS can be set to enable and dis
85. rature measurement interval used by the P7 command Action Controls how often temperature measurements are taken during a P7 pressure measurement sequence If PS 0 an initial temperature measurement is taken and all subsequent pressure measurements are compensated using that value If PS 1 a temperature measurement is taken before each pressure measurement same as P4 If PS n and n gt 1 an initial temperature measurement is taken and subsequent temperature measurements are taken after every n pressure measurements COMMAND DESCRIPTIONS 7 5 Q2 Q4 Range 1 to 65535 Typical command 0100EW 0100PS 4 Typical response 0001PS 4 NOTE When setting virtually all parameter values you must precede the command with an EW Enable Write command Please refer to Section 7 2 1 for more information Continuously sample and send temperature period measurement values in microseconds Action Measure temperature period send temperature period value and repeat until commanded to stop Typical command 0100Q2 Typical response 00015 1234567 Value 5 1234567 00015 1234568 Value 5 1234568 00015 1234567 Value 5 1234567 Continuously sample and send temperature measurement values in selected engineering units Action Measure temperature period calculate temperature send temperature value and repeat until commanded to stop Typical command 0100Q4 Typical response 000122 345 Value 22 345 000
86. rement values if selected will be displayed and periodically updated Congratulations You have taken your first pressure measurement We encourage you to use DQI 2 0 to explore the remaining functions of your DIGIQUARTZ Intelligent device Refer to the Help function in DQI 2 0 for more information QUICK START 5 2 6 Getting Started 6 1 Compatible serial hardware DIGIQUARTZ Intelligent devices are compatible with any equipment that conforms to the EIA RS 232 and or RS 485 specifications They are also backward compatible with earlier Intelligent devices that support RS 232 only and can be used together in RS 232 serial loop networks DIGIQUARTZ Intelligent devices with dual RS 232 and RS 485 ports are not compatible with the Model 710 display and DIGIQUARTZ Intelligent devices with RS 232 only are not compatible with the Model 715 display 6 2 Serial and power connections Serial and power connections are made via a male 15 pin high density D subminiature connector Refer to Section 14 for connector pin details Refer to section 15 for detailed system wiring diagrams It is recommended that you establish communications and verify transmitter operation prior to permanently installing the device The RS232 RS485 Power Module Kit 110V p n 1294 001 220V p n 1294 002 simplifies the task of powering the transmitter and making RS 232 serial connections to a PC or other serial host NOTE The RS232 RS485 Power Module K
87. response 0001MR gt OK NOTE The minimum and maximum pressure values are also reset when power is cycled 7 1 5 Measurement integration time commands DIGIQUARTZ Intelligent devices sample the transducer s pressure and temperature signals for a length of time specified by the measurement integration time commands The measurement integration time has a direct affect on sampling rate and measurement resolution See Section 9 for details PI and TI are the primary integration time commands for pressure and temperature signal measurement The legacy commands PR and TR may also be used The advantage of PI and TI is that the specified integration time is expressed directly in milliseconds NOTE The legacy commands PR and TR traditionally specified the number of signal periods to sample This integration scheme has been replaced by integration over a fixed length oftime For backward compatibility values input using PR and COMMAND DESCRIPTIONS 7 7 TR are converted to an equivalent time using nominal pressure and temperature period values NOTE When Simultaneous Integration is selected the pressure and temperature signals are integrated simultaneously resulting in faster data rates at a given pressure resolution In this case the time needed to acquire a pressure measurement is controlled by the greater of the pressure and temperature integration times See Sections 4 3 and 7 1 6 for more information about Simultaneous Integration
88. rop an Intelligent device or allow tools to fall on the unit or its pressure port INTRODUCTION 1 2 1 5 Manual summary This manual is organized as follows Section 1 Section 2 Section 3 Section 4 Section 5 Section 6 Section 7 Section 8 Section 9 Section 10 Section 11 Section 12 Section 13 Section 14 Section 15 Section 16 Section 17 Section 18 Section 19 Introduction to this manual Descriptions of the hardware covered in this manual Information about installation Description of the features and functions common to all DIGIQUARTZ Transmitters and Depth Sensors Information needed to quickly connect a DIGIQUARTZ Intelligent device to a serial host and take pressure measurements Information about interconnection serial communications command and response data format measurement options device configuration and the DIGIQUARTZ application software Detailed command descriptions Description of the nano resolution functionality Explanation of the relationship between resolution integration time and sampling rate Recommendations for maximizing sampling rate Information regarding the operation of Intelligent devices in RS232 serial loop and RS485 multi drop networks Information about interconnecting and operating the Model 715 display with DIGIQUARTZ Intelligent devices A functional description of the Tare Input Tare Output and Overpressure I O lines Connector pin out diagra
89. s of the Model 715 see Figure 4 below anel Mount Bracket Figure 4 Model 715 Rear Panel Detail 3 Insert the Model 715 through the panel Insert the back end ofthe Model 715 through the front ofthe panel cutout 4 Replace the panel mount brackets Slide the panel mount brackets into the slot on the side ofthe Model 715 and up against the panel 5 Install setscrews Insert the setscrews into the panel mount bracket and tighten USING THE MODEL 715 DISPLAY 12 3 13 I O Lines DIGIQUARTZ Intelligent Transmitters feature discrete digital I O lines that may be used to control and monitor tare and overpressure alarm functions See Section 7 2 5 for more information regarding tare and overpressure functions NOTE DIGIQUARTZ Intelligent Depth Sensors do not support the I O lines described in this section INPUT Tare Input Activated by a momentary contact closure to ground When taring is not in effect and Tare Input is activated taring is enabled on the next pressure measurement When taring is in effect and Tare Input is activated taring is disabled and the next pressure measurement taken will not be tared WARNING To prevent possible damage do not connect any voltage source other than DC power ground to the Tare Input OUTPUTS Tare Output Indicates whether the most recent pressure measurement was tared The tare output is set to logic high when tar
90. surement data formatting RS 232 and RS 485 serial communications Differences between the RS 232 and RS 485 ports Calibration Unit identification 4 14 Model 715 Display 5 Quick Start 6 Getting Started Compatible serial hardware Serial and power connections Communications Command basics Command and response format DIGIQUARTZ software programs PAGE Y n a m OWE hym ii ww YW Se ARAaRaARS oy oe eee ee ee Ahh UNa nnc ee AA PERES NAA WW 4 7 5 1 6 1 6 1 6 1 6 1 6 2 6 2 6 3 7 Command Descriptions 7 1 7 1 Measurement commands 7 1 7 1 1 Single measurement commands 7 1 7 1 2 Sample and hold measurement commands 7 2 7 1 3 Continuous measurement commands 7 4 7 1 4 Minimum Maximum pressure commands 7 6 7 1 5 Measurement integration time commands 7 7 7 1 6 Measurement mode commands 7 9 7 1 7 User defined commands 7 11 7 2 Configuration commands 7 14 7 2 1 Enable write command 7 14 7 2 2 Communications commands 7 15 7 2 3 Engineering units commands 7 18 7 2 4 Power management commands 7 19 7 2 5 Tare and overpressure commands 7 20 7 2 6 Measurement data formatting commands 7 23 7 2 7 Unit identification commands 7 27 7 2 8 Time reference stamp command 7 29 7 2 9 Model 715 Display configuration commands 7 30 7 3 Serial data output mode command 7 34 7 4 Diagnostic commands 7 36 7 5 Calibration commands 7 36 7 6 Global commands 7 39 8 Nano Resolutio
91. t commands to synchronize measurements from multiple devices The sample and hold measurement commands are P5 P6 Q5 Q6 All sampling commands and certain other commands may be either individually or globally addressed P1 through P7 Q1 through Q6 DB DS VR EW NOTE DS is available in firmware version R3 00 and later CAUTION Global sampling commands sent to multiple units on an RS 485 multi drop network may result in data collisions when multiple devices respond simultaneously COMMAND DESCRIPTIONS 7 39 8 Nano Resolution Features amp Functions 8 1 Introduction Starting with firmware revision R5 10 or later it is now possible to achieve parts per billion resolution nano resolution This feature can be enabled by software command When disabled the sensor is backward compatible and works in the standard mode with typical parts per million resolution Nano resolution is achieved by sub sampling the pressure at a much higher rate typically 8 kHz and applying digital signal processing techniques Because of the much higher processing requirements more input power is required In general the nano resolution feature is only useful if the pressure is stable enough over the effective sampling period and if the data acquisition system can handle additional digits The practical bandwidth of interest is in the infrasound and deep infrasound 10 to 0 001 Hz Two methods for nano resolution are available The
92. t your system is hooked up properly Check your power source to ensure that the proper voltage is supplied to the device If you believe that your system is wired and powered properly but you still cannot communicate with your device s try using a PC and DIGIQUARTZ Interactive software DQI to verify operation and configuration of each device individually To do this you will need to connect each device one at a time to the PC RS 232 port DQI will allow you to establish communications with DIGIQUARTZ Intelligent devices regardless of baud rate or ID settings If you are networking your devices make sure that all are set to the same baud rate and that any earlier generation RS 232 only devices are set to PT N 8 data bits no parity 1 stop bit Also ensure that each device is set to a unique ID value If your device s work properly with DQI but you are still unable to communicate with them in your system the problem is almost certainly caused by your serial host hardware software settings or your connections 2 Check your serial host Make sure your serial host is configured for the proper baud rate and 8 data bits no parity and 1 stop bit Make sure your commands are terminated with a carriage return and line feed ASCII 13 and 10 Your serial host hardware or software may need to be configured to provide proper command termination Make sure that you are sending commands to the proper ID If you are unsure which ID to
93. uration tasks These programs can be found on the DIGIQUARTZ CD Library which is provided with each Intelligent device purchase The latest versions of these and other software programs are also available at the Paroscientific web site at www paroscientific com 6 6 1 Digiquartz Interactive 2 0 DQI 2 0 Digiquartz Interactive 2 0 is a Windows program that makes it easy to communicate with and configure DIGIQUARTZ Intelligent devices We encourage you to install DQI 2 0 and use it to verify proper device operation configure your device take measurements and experiment with its functions DQI 2 0 is separated into two main sections Configuration and Monitoring and Digiquartz Terminal The Configuration and Monitoring section provides a means of viewing changing storing and retrieving the configuration parameters of your instrument It also allows you to take measurements and display them numerically and in a real time graph Measurement data may also be logged to a text file in a format that can be easily imported into popular PC programs such as Microsoft Excel or Word The Digiquartz Terminal section allows you to interactively communicate with your instrument using text based commands Measurement data may be logged to a text file in a format that can be easily imported into popular PC programs such as Microsoft Excel or Word GETTING STARTED 6 3 6 6 2 DIGIQUARTZ Assistant DQA DIGIQUARTZ Assistant

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