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Vaisala GMP252 User Manual

Manual is about: CARBOCAP Carbon Dioxide Probe

Summary of GMP252

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    M211897en-d user guide vaisala carbocap â carbon dioxide probe gmp252.

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    Published by vaisala oyj street address: vanha nurmijärventie 21, fi-01670 vantaa, finland mailing address: p.O. Box 26, fi-00421 helsinki, finland phone: +358 9 8949 1 visit our internet pages at www.Vaisala.Com . © vaisala 2018 no part of this manual may be reproduced, published or publicly displa...

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    Table of contents 1. About this document......................................................................................7 1.1 version information.............................................................................................7 1.2 related manuals......................................

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    4.11 analog output.................................................................................................. 44 4.12 calibration and adjustment............................................................................ 49 4.13 environmental compensation commands................................

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    9. Maintenance......................................................................................................93 9.1 cleaning............................................................................................................. 93 9.1.1 chemical tolerance...................................

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    List of figures figure 1 gmp252 probe parts..........................................................................................11 figure 2 asm212011sp flow-through adapter...........................................................13 figure 3 probe cuvette with mirror and sensor chips.............

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    List of tables table 1 document versions.............................................................................................. 7 table 2 related manuals.................................................................................................... 7 table 3 applicable patents..............

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    Table 52 modbus measurement data registers (read-only).................................113 table 53 modbus configuration data registers (writable).................................... 114 table 54 modbus status registers (read-only)........................................................ 116 table 55...

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    1. About this document 1.1 version information table 1 document versions document code date description m211897en-d march 2018 • added information about using the probe with vaisala insight pc software. • putty terminal settings instructions updated. • calibration uncertainty specification updated. ...

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    Document code description m211876en vaisala indigo™ 201 analog output transmitter quick guide m211966en vaisala indigo™ 202 digital transmitter user guide m211967en vaisala indigo™ 201 digital transmitter quick guide 1.3 documentation conventions alerts you to a serious hazard. If you do not read an...

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    1.5 patent notice this product is protected by the following patents and their corresponding national rights: table 3 applicable patents patent issued by patent number united states patent and trademark office us 5,827,438 us 6,177,673 european patent office ep0776023 ep0922972 german patent and tra...

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    Gmp252 user guide m211897en-d 10

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    2. Product overview 2.1 introduction to gmp252 gmp252 is designed for co 2 measurement in demanding applications that require reliable and accurate performance. The measurement range is 0 ... 10 000 ppmco 2 (measurements can be carried out in the 10 000 ... 30 000 ppmco 2 range with reduced accuracy...

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    2.2 basic features and options • co 2 measurement range 0 ... 10 000 ppmco 2 . • measurement up to 30 000 ppmco 2 with reduced accuracy. • operating temperature range -40 … +60 °c (-40 … +140 °f). • vaisala carbocapâ co 2 sensor with excellent long-term stability. • measurement compensated for effec...

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    2.2.2 additional features with indigo transmitters gmp252 probes manufactured from 2017 onwards are compatible with vaisala indigo transmitters. Connecting the probe to an indigo transmitter provides a range of additional options for outputs, measurement viewing, status monitoring, and configuration...

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    2.3 operating principle of co 2 measurement 1 2 3 the vaisala carbocapâ sensor used in the probe is a silicon-based, nondispersive infrared (ndir) sensor for measurement of gaseous carbon dioxide in air-like gases. Figure 3 probe cuvette with mirror and sensor chips 1 mirror 2 cuvette 3 sensor chips...

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    1 2 3 4 6 7 5 figure 4 co 2 measurement in the measurement cuvette 1 gold-plated mirror 2 light absorbed by co 2 in the measured gas 3 hermetic window 4 fabry-pérot interferometer 5 light source (microglow) 6 hermetic window 7 thermopile detector 2.4 environmental compensation when necessary, variou...

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    Compensation parameters are configured on the order form when ordering the probe, and can later be updated using vaisala industrial protocol or modbus protocol. You can also turn off any of the compensations. In that case, the probe uses the default compensation value that is mathematically neutral ...

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    2.4.2 pressure compensation the probe does not have on-board pressure measurement. However, a pressure reading from an external source can be used as a setpoint value for compensation using vaisala industrial protocol or modbus. If pressure compensation is turned off, the probe uses the default comp...

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    More information ‣ configuration registers (page 114) ‣ configuring filtering factor with indigo (page 77) 2.7 analog output overrange behavior the analog output of the probe has a defined behavior when the values measured by the probe are outside the scaled analog output range. At first, the output...

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    • when the measured co 2 rises above 2000 ppmco 2 , the output rises above 5 v. • the output keeps rising until the measurement is 2100 ppmco 2 , at which point the probe outputs 5.25 v. • if the co 2 level rises above 2100 ppmco 2 , the output still remains at 5.25 v. • if the co 2 level rises abov...

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    When returning a product for calibration or repair, make sure it has not been exposed to dangerous contamination, and is safe to handle without special precautions. Warning! Do not modify the unit or use it in ways not described in the documentation. Improper modification may lead to safety hazards,...

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    3. Installation 3.1 gmp252 probe dimensions 12 mm [0.47 in] 76 mm [2.99 in] 42 mm [1.65 in] 130 mm [5.11 in], Ø 25 mm [0.98 in] m12 male connector figure 6 gmp252 dimensions 3.2 recommended installation the probe can be installed in an environment with an operating temperature range -40 ... +60 °c (...

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    More information ‣ spare parts and accessories (page 106) 3.3.1 243261sp mounting flange the optional flange accessory is used to install the probe body through a wall or other surface. 1 2 3 figure 7 probe with 243261sp mounting flange 1 4 phillips head screws (included) 2 mounting flange (diameter...

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    3.3.2 243257sp mounting clips the optional mounting clips (set of two clips) are used to hold the probe in place for example on a wall or other surface. Each clip base attaches to the installation surface with one screw (screw hole Ø 4.2 mm). Ø 4.2 mm figure 8 probe in 243257sp mounting clips 3.3.3 ...

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    3.3.4 dtr250 radiation shield the optional dtr250 radiation shield (vaisala order code: dtr250) protects the probe from solar radiation and precipitation in outdoor installations. Mounting plate 2 x 7 mm holes threaded gland ø figure 10 gmp252 in dtr250 radiation shield more information ‣ dtr250 rad...

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    3.4 power supply the supply voltage range of the probe is 12 ... 30 vdc with the digital output option. If the analog output is used, the supply voltage range is 12 ... 30 vdc for voltage output and 20 ... 30 vdc for current output. Typical power consumption is less than 0.4 w in continuous operatio...

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    Gmp252 user guide m211897en-d 26.

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    4. Vaisala industrial protocol 4.1 vaisala industrial protocol overview the rs-485 line of the probe provides an implementation of the vaisala industrial protocol that can be used for service and configuration use, or for interfacing with the system to which the probe is integrated. The protocol is ...

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    The steps below describe how to connect to the probe using the putty terminal application for windows and a usb computer connection cable. Connecting with a computer allows you to configure and troubleshoot your probe using serial line commands. 1. If you have not used the vaisala usb cable before, ...

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    More information ‣ serial interface settings (page 27) ‣ installing the driver for the usb service cable (page 29) 4.4.1 installing the driver for the usb service cable only windowsâ operating systems are supported by the driver of the usb service cable. 1. Connect the usb service cable to a usb por...

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    4.5 accessing serial commands from modbus or analog mode 1. Connect the usb cable to your pc and start the terminal application as instructed in connecting with a computer (page 27) . 2. Start a new terminal session using the default serial settings. 3. Keep the enter key pressed down and connect th...

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    2. Set the serial mode to modbus with the smode command: smode modbus 3. Set the modbus address to 240 with the addr command: addr 240 4. Set the serial line settings to 19200/n/8/2 with the seri command: seri 19200 n 8 2 5. Power off (disconnect) the probe or reset with the resetcommand. The new co...

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    Table 7 (page 32) lists the basic serial commands that are available by default. To access advanced serial commands (listed in table 8 (page 33) ), enter the command pass 1300. Table 7 basic serial commands command description device information and status ? Show probe information. ?? Show probe inf...

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    Table 8 advanced serial commands command description serial line output and communication addr [0 … 254] show or set probe address. Analog output amode show or set analog output mode (analog output limits and error level). Aover show or set analog output overrange and clipping behavior. Asel show or...

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    Syntax description example: ? Device : gmp25x copyright : copyright (c) vaisala oyj 2016. All rights reserved. Sw name : gmp25x sw version : 1.0.0 snum : gmp233_5_18 ssnum : s1234567 cbnum : c1234567 calibrated : 20160504 @ vaisala/r&d address : 0 smode : stop table 10 errs command syntax descriptio...

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    Syntax description example (showing a list of the basic commands): help adate addr atext close env errs form help intv pass rr eset rx sdelay send sendx seri smode snum system uniqid time vers table 12 snum command syntax description snum show serial number of the probe. Example: snum snum : m022002...

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    Syntax description example: system device name : gmp25x sw name : gmp25x sw version : 1.0.0 operating system : tsfos1.0 table 14 time command syntax description time show how long the probe has been in operation since the last startup or reset. The operation counter is in format hh:mm:ss. Example: t...

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    Syntax description addr [aaa] set new device address. Aaa = address, 0 ... 254 (default = 240) example (shows 0 as current address, enter 5 as the new address): addr address : 0 addr 5 address : 5 table 17 close command syntax description close close the connection that was opened with the open comm...

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    Syntax description example (show currently used measurement format (default format shown here)): form 6.0 "co2=" co2 " " u3 #r #n output example (continuous output from run mode): co2= 452 ppm example (set output format as %co 2 ): form 3.1 "co2=" co2% " " u4 #r #n ok output example (continuous outp...

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    Syntax description example (set output format as co 2 ppm, with start of text (ascii character 002) and end of text (003) ascii codes, and without line feed and carriage return at the end): form #002 6.0 "co2=" co2 " " u3 #003 ok output example (continuous output from run mode, ascii codes not visib...

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    Modifier description ux name of the measurement unit using x number of characters. For example, u3 shows the name of the measurement unit with three characters. Cs4 modulus-65536 checksum of message sent so far, ascii encoded hexadecimal notation. Csx nmea xor-checksum of message sent so far, ascii ...

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    Syntax description example (target probe in poll mode, with address 52): open 52 gmp25x: 52 opened for operator commands table 23 r command syntax description r start the continuous outputting of measurement values as an ascii text string to the serial line. The probe keeps outputting measurement me...

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    Table 25 sdelay command syntax description sdelay show serial line transmission delay (1 … 255). 1 unit = 4 milliseconds (for example, 5 = 0.020 second transmission delay). Sdelay [delay] set a new serial line transmission delay. Delay = serial line delay, range 1 … 255 (1 unit = 4 ms). Example (set...

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    Syntax description seri [b p d s] set new serial line settings. The new settings will be taken into use when the probe is reset or powered up. B = baud rate (9600, 19200, or 38400) p = parity • n = none • e = even • o = odd d = data bits (7 or 8) s = stop bits (1 or 2) for modbus, baud rate must be ...

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    Syntax description smode [mode] set serial line start-up operating mode. New mode is taken into use when the device is reset or powered up. Available modes: stop = no automatic output. All commands available. Default mode. Run = automatic output of measurement messages. You can stop the output with ...

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    Syntax description amode [channel lo_value hi_value error_value] set new analog output limits and error output value. Channel = analog output channel • 1 = voltage output (v) • 2 = current output (ma) lo_value = low limit of the channel. Hi_value = high limit of the channel. Error_value = error valu...

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    Syntax description aover [channel clipping error_ limit] set the behavior of the analog output when the measured value is outside the scaled output range. Channel = analog output channel • 1 = voltage output (v) • 2 = current output (ma) clipping = output margin (%) at which the output is clipped. E...

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    Syntax description example (for channel 1): 1. View currently set analog output scaling ( asel command), limits and error level (amode command), and overrange behavior ( aover command): pass 1300 asel 1 aout 1 quantity : co2(0 ... 2000) amode 1 aout 1 range (v) : 0.00 ... 5.00 (error : 0.00) aover 1...

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    Syntax description output voltage (v) time 0.00 in error state at >2200 ppm (2000 ppm + 10%) 5.00 5.25 clipped at 2100 ppm (2000 ppm + 5%) regular measurement output clipping limit error level figure 12 example of analog output overrange behavior the example shown above uses output scaled to 0 ... 5...

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    Syntax description example (for channel 1, show the currently set analog output parameter and scaling): pass 1300 asel 1 aout 1 quantity : co2(0 ... 10000 ppm) example (for channel 1, set scaling to 0 ... 4000 ppmco 2 ): pass 1300 asel 1 co2 0 4000 aout 1 quantity : co2(0 ... 4000 ppm) 4.12 calibrat...

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    Table 34 cdate command syntax description cdate show calibration date. Cdate [yyyymmdd] set a new calibration date. Yyyymmdd = year (yyyy), month (mm) and day (dd) of calibration example: pass 1300 cdate calibration date : 20150220 example (set a new calibration date to june 30, 2015): cdate 2015063...

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    Syntax description cco2 -lo [co2] cco2 -hi [co2] perform a 1-point (only either low or high concentration) or 2-point (both low and high concentrations) calibration and adjustment. -lo = adjustment at low concentration (under 1000 ppmco 2 ) -hi = adjustment at high concentration (over 2000 ppmco 2 )...

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    Syntax description example (perform 2-point calibration): 1. Let the probe stabilize in the desired low co 2 concentration (here: 200 ppmco 2 ). 2. Enter the calibration commands: pass 1300 cco2 -lo 200 ok cco2 -save ok 3. Let the probe stabilize in the desired high co 2 concentration (here: 3000 pp...

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    Syntax description example (set temperature compensation to setpoint mode, and change temperature setpoint value to 5.00 °c in ram): pass 1300 tcmode on t comp mode : on env xtemp 5.00 in eeprom: temperature (c) : 8.00 pressure (hpa) : 1013.00 oxygen (%o2) : 21.00 humidity (%rh) : 30.000 in use: tem...

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    Syntax description example (enable temperature, pressure and relative humidity compensation using setpoint values): pass 1300 tcmode on t comp mode : on pcmode on p comp mode : on rhcmode on rh comp mode : on table 41 tcmode command syntax description tcmode check current temperature compensation mo...

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    4.14 other commands table 42 frestore command syntax description frestore restore the probe to its factory configuration. All user settings and user calibration parameters will be lost. After using the frestore command, reset the probe using the reset command. Example (restore the factory settings a...

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    5. Modbus the probe can be accessed using the modbus serial communication protocol. The supported modbus variant is modbus rtu (serial modbus) over rs-485 interface. For instructions on enabling the modbus mode when you are using the probe with vaisala industrial protocol, see enabling modbus mode f...

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    Gmp252 user guide m211897en-d 60

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    6. Vaisala insight software vaisala insight software is a configuration software for indigo-compatible probes. The supported operating systems are windows 7 (64-bit), windows 8.1 (64-bit), and windows 10 (64-bit). With the insight software, you can: • see device information and status. • see real-ti...

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    Connect the probe to the insight software in the exact order described in the following steps. 1. Open the insight software. 2. Connect the usb cable to a free usb port on the pc. 3. Connect the probe to the usb cable. 4. Wait for insight software to detect the probe. Gmp252 user guide m211897en-d 6...

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    7. Using gmp252 with indigo transmitters 7.1 indigo overview 4 2 6 5 3 1 figure 14 gmp252 attached to indigo transmitter 1 3.5” tft lcd color display: non-display option with led available for certain models. 2 probe locking wheel: insert probe, hold in place and turn the wheel counterclockwise. 3 p...

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    The probe can be connected to vaisala indigo transmitters, either directly on the transmitter from the probe's connector, or by using a cable between indigo and the probe. Indigo transmitters are host devices that extend the feature set of connected probes with a range of additional options for outp...

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    To use the wireless configuration interface to modify the settings of your indigo transmitter and the connected probe, you must first enable the transmitter's wireless connection and then connect to indigo with your mobile device or computer. Most major browsers (for example, firefox, chrome, safari...

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    7.2.1 checking indigo support in probe to verify that your probe supports indigo, check the serial number on the probe body. All probes intended for use with indigo manufactured from 2017 onwards (serial numbers starting with the letter n or latter in alphabetical order) are compatible with indigo. ...

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    7.3 attaching probes and cables 1 2 3 figure 17 attaching probes and cables to indigo 1 insert probes into the probe connector with the orientation mark facing out. 2 probes are locked in place with the locking wheel. Never turn from the probe body. 3 connect probe cables in the same way as probes: ...

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    7.4 connecting to wireless configuration interface select wlan to connect to: 1. Wlan xyz 3. Wlan abc 2. Indigo_idxx 1 3 500 ppm wlan on indigo 200 2 carbon dioxide concentration figure 18 enabling and accessing indigo's wireless configuration interface 1 wireless connection activation button 2 wire...

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    7.5 logging in to wireless configuration interface figure 19 indigo login view when you open indigo's wireless configuration interface in your browser, you are prompted to log in. There are 2 available user levels: • user: view-only access available for all users. Does not require a password. • admi...

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    7.6 wireless interface menus 1 2 3 4 5 figure 20 wireless configuration interface, desktop browser view 1 measurements: displays the measurement data of the connected probe 2 status: contains information about the status of indigo and the connected probe (for example, notifications and alarms) 3 cal...

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    7.7 configuring analog outputs with indigo 201 indigo 201 analog output transmitters have 3 analog current (ma) or voltage (v) outputs. Each analog output has the same set of configuration options (analog output 1 shown in example). Note that you must select either the current or voltage output mode...

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    More information ‣ indigo 201 analog output mode selection (page 72) 7.7.1 receiving analog output settings from probe when you take indigo 201 in use for the first time and have not entered an analog output configuration, the transmitter automatically adapts the analog output configuration of the f...

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    Figure 23 selecting indigo 201 analog output mode 7.8 using modbus with indigo 202 indigo 202 digital transmitters are designed for modbus rtu (rs-485) communication. There are 2 groups of modbus register addresses in use in indigo 202: probe registers and indigo registers. The probe registers are r...

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    Address name data type e002 hex connected probe text [30] e011 hex relay a status enum e012 hex relay b status enum 1) see the connected probe's modbus documentation for probe-specific register information more information ‣ modbus registers (page 113) ‣ modbus (page 59) 7.8.1 modbus serial communic...

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    7.9 configuring relays with indigo indigo transmitters have 2 configurable relays (relay a and relay b). Both relays have configuration options for selecting the parameter that is used to control the relay, activation triggers, hysteresis, and error state behavior. 1 2 3 4 4 5 figure 24 relay config...

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    7.10 changing environmental compensation settings with indigo the configuration options in indigo transmitters include probe-specific settings that vary depending on the features of the connected probe. In the case of vaisala carbocapâ carbon dioxide probes gmp251 and gmp252, the probe- specific set...

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    4. Enter the power-up default compensation values that are stored into the probe's permanent memory. The values entered into the compensation power-up defaults fields remain in use also after probe reset. 5. The values you enter are saved automatically when you exit the input field (for example, tap...

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    By default, the filtering factor is set to 1.0 (1.0 = 100 in the configuration range), which means the latest measurement is shown directly in the output, without any filtering. To apply filtering, enter a lower filtering factor to include previous measurements in the calculation of measurement outp...

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    • configuration: options for using environmental compensations (probe-specific range of options) that allow compensating for the conditions present in the calibration environment, for example, pressure, temperature, and background gases. Also includes probe-specific configuration options that are no...

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    7.12.2 restoring factory adjustment always restore factory adjustment before entering a new adjustment. This prevents any possible earlier adjustments having an effect on the new adjustment you make. To restore factory adjustment: 1. Connect to the wireless configuration interface and open the calib...

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    When you enter a value into a field, the value is saved automatically when you exit the input field (for example, tap on an area outside of the field). To make a 1-point adjustment with indigo wireless configuration interface: 1. Connect to the wireless configuration interface and open the calibrati...

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    6. Place the probe in the reference environment (adjustment point 1) and wait until the measurement has stabilized. You can follow the stabilization from the measurements tab. 7. Enter the value of the reference (for example, 500 if calibrating with a 500 ppmco 2 reference gas) into the reference va...

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    7. Enter the value of the first reference (for example, 0 if calibrating with a 0 ppmco 2 reference gas) into the reference value, point 1 field. 8. After you enter the reference value, the value of the measured value, point 1 field updates automatically. 9. Place the probe in the second reference e...

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    Gmp252 user guide m211897en-d 84.

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    8. Operating with mi70 indicator 8.1 overview of mi70 support the probe is compatible with instruments that utilize the mi70 indicator, for example the gm70 hand-held carbon dioxide meter. The mi70 indicator is a convenient service tool for viewing the measurement readings and performing calibration...

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    You can change the default function key shortcuts (graphic, hold/save, record) to other menus or functions in main menu > settings > user interface > program shortcut keys. 8.3 graphical display the graphical display shows you the measurements as a curve (the curve of the uppermost quantity shown in...

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    4. Turn on the mi70 indicator (time and date are requested at first startup). Mi70 detects the probe and proceeds to show the measurement screen. The parameters measured by probe will start to show valid measurement results after a few seconds. 8.6 mi70 indicator parts 1 2 3 4 6 5 figure 28 mi70 ind...

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    3. To view the saved display, go to basic display and select record > view recorded data. Alternatively, select main menu > recording/viewing > view recorded data. A list of saved displays and data recordings appears. The icons on the left of the date and time indicate whether the file is a saved di...

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    Figure 29 co 2 reading with tcomp and pcomp on mi70 screen you can change the compensation settings from main menu > settings > measurement settings. Figure 30 probe compensation settings on mi70 screen when you turn a compensation off, the probe still shows a value for the corresponding display qua...

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    When two probes are connected to the mi70 indicator, mi70 uses roman numerals “i” and “ii” to indicate which port the parameter or function in question is connected to. 8.10.1 1-point adjustment with an mi70-compatible reference probe 1. Connect the gmp252 probe to port i of the mi70 indicator. 2. C...

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    10. Select to same as co2(ii). 11. You will be prompted to confirm you want to adjust: select yes. 12. If the adjustment is successful, mi70 will show the text adjustment done, after which you will return to the adjustment mode. At this point you can press back and exit to leave the adjustment mode....

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    8. The adjustment mode is now active, and you can see the measured co 2 reading on the screen. To proceed with the adjustment, press adjust. 9. Select 1-point adjustment. 10. You will be prompted if you really want to adjust. Select yes. 11. You are now in the 1-point adjustment screen. Allow the me...

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    9. Maintenance 9.1 cleaning you can clean the probe body by wiping it with a moist cloth. Standard cleaning agents can be used. When cleaning, follow these precautions: • do not immerse the probe in liquid to clean it. • be careful not to block the filter when cleaning the probe. The optional sinter...

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    9.2 changing the filter change the filter to a new one if it shows visible signs of contamination or dirt. When changing the filter, use clean gloves to avoid blocking the pores of the new filter. Figure 31 opening the filter when changing the filter, you can use clean instrument air to gently blow ...

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    9.3.1 calibration setup using hand-held meter as reference you can perform a 1-point calibration using a hand-held meter as a reference. You will need a calibrated reference instrument to compare against, for example a gm70 hand-held meter with a calibrated gmp222 probe. With the probe and the refer...

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    More information ‣ environmental compensation (page 15) 9.3.3 limits of adjustment the probe limits the amount of adjustment that is allowed to the co 2 measurement. The maximum correction that you can apply is 1000 ppm + 25 % of the probe’s uncorrected reading. Previous user adjustments do not affe...

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    More information ‣ calibration and adjustment (page 49) ‣ configuration registers (page 114) ‣ calibration and adjustment with mi70 indicator (page 89) ‣ indigo calibration overview (page 78) 9.3.5 drw244827sp calibration adapter the optional calibration adapter accessory can be used to feed a refer...

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    Gmp252 user guide m211897en-d 98.

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    10. Troubleshooting 10.1 problem situations problem possible cause remedy analog output reading is unchanging and appears incorrect. Analog output is in error state. Remove the cause of the error state and the analog output will recover its normal function. Probe outputs stars "****" on serial line ...

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    Error message description recommended action critical errors program memory crc critical error program memory is corrupted. Fatal error, contact vaisala. Parameter memory crc critical error parameter memory is corrupted. Fatal error, contact vaisala. Errors low supply voltage error check supply volt...

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    • probe detects a measurement malfunction. This means an actual measurement problem, such as sensor damage or unsuitable environmental conditions. • measured value(s) are significantly outside the scaled output range. The default error level depends on the output type: output default error level 0 ....

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    Problem possible cause remedy the interface does not open in the browser. The browser has issues with loading the landing page. Enter the default indigo ip address http://192.168.1.1 in the browser's address bar. Cannot connect to the indigo access point with iphone. The iphone wlan settings prevent...

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    11. Technical data 11.1 gmp252 specifications table 47 measurement performance property description/value measurement range 0 ... 10 000 ppmco 2 (up to 30 000 ppmco 2 with reduced accuracy) accuracy at 25 °c and 1013 hpa (incl. Repeatability and non-linearity) 0 ... 3000 ppmco 2 ±40 ppmco 2 3000 ......

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    Property description/value with compensation, 0 ... 10 000 ppm%co 2 , 0 ... 90 %o 2 ±0.6 % of reading (at +25 °c (+77 °f)) without compensation (typical) -0.08 % of reading/%o 2 start-up, warm-up and response time start-up time at +25 °c warm-up time for full spec. Response time (t90) with standard ...

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    Property description/value connector type m12 5-pin male ip rating, probe body ip65 materials probe housing material pbt plastic filter ptfe connector nickel plated brass dimensions probe diameter 25 mm (0.98 in) probe length 130 mm (5.12 in) table 50 inputs and outputs property description/value di...

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    11.2 spare parts and accessories information on spare parts, accessories, and calibration products is available online at www.Vaisala.Com and store.Vaisala.Com . Name order code porous sintered ptfe filter for gmp252 drw244221sp probe cable with open wires (1.5 m (4.9 ft)) 223263sp probe cable with ...

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    11.3 gmp252 probe dimensions 12 mm [0.47 in] 76 mm [2.99 in] 42 mm [1.65 in] 130 mm [5.11 in], Ø 25 mm [0.98 in] m12 male connector figure 33 gmp252 dimensions 11.4 243261sp mounting flange dimensions Ø 4 .2 35.4 5 0 mm figure 34 243261sp mounting flange dimensions chapter 11 – technical data 107.

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    5 5 1 7 Ø 36 Ø 60 Ø 25.6 Ø 28.5 Ø 42 mm figure 35 243261sp mounting flange dimensions, cross section 11.5 drw244827sp calibration adapter dimensions mm figure 36 drw244827sp calibration adapter dimensions gmp252 user guide m211897en-d 108.

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    11.6 asm212017sp spray shield dimensions Ø 40 [1.57] 72 [2.83] shield + gmp251: 113 [4.45] shield + gmp252: 146 [5.75] mm [in] figure 37 asm212017sp spray shield dimensions mm figure 38 gmp252 spray shield cross section chapter 11 – technical data 109.

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    11.7 dtr250 radiation shield dimensions 107 [4.2] 14 5 [5.7] 105 [4.13] mm [in] figure 39 dtr250 radiation shield dimensions (mm) gmp252 user guide m211897en-d 110

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    11.8 dtr250a pole mounting kit dimensions 105 [4.13] mm [in] 107 [4.2] 1 45 [5.7] 213 [8.38] 2 69 [10.6] figure 40 dtr250a pole mounting kit dimensions (in mm [inch]) chapter 11 – technical data 111.

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    Gmp252 user guide m211897en-d 112.

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    Appendix a. Modbus reference a.1 function codes table 51 supported function codes function code (decimal) function code (hexadecimal) name 03 03 hex read holding registers 16 10 hex write multiple registers 43/14 2b hex / 0e hex read device identification a.2 modbus registers registers are numbered ...

  • Page 116

    Register number (decimal) address (hexadecimal) register description data format unit 258 0101 hex measured co 2 value 16-bit signed integer ppm 1) (scaled, up to approx. 320 000 ppm) 1) the ppm output of the second measured co 2 value register (number 258) is scaled and must be multiplied by 10. A....

  • Page 117

    Register number (decimal) address (hexadecimal) register description data format unit / valid range 525 020c hex volatile (value cleared at probe reset) humidity compensation 32-bit float range 0 … 100 %rh (init copied from power-up value) 527 020e hex volatile (value cleared at probe reset) oxygen ...

  • Page 118

    Register number (decimal) address (hexadecimal) register description data format unit / valid range 777 0308 hex co 2 filtering factor 16-bit integer valid range 0 ... 100 (default: 100 (no filtering)). For information on setting the filtering factor, see filtering factor (page 120) . To apply an ac...

  • Page 119

    A.2.4 device identification objects table 55 device identification objects object id (decimal) object id (hexadecimal) object name example contents 0 00 hex vendorname "vaisala" 1 01 hex productcode "gmp25x carbon dioxide probe " 2 02 hex majorminorversion software version (for example "1.2.3") 3 03...

  • Page 120

    A.3 modbus communication examples reading co 2 value device address used in the following examples is 240 (f0 hex ). The values returned by the device differ depending on the ambient conditions and/or device settings. Your device might not return exactly same values. Request response bytes on the li...

  • Page 121

    Writing volatile compensation pressure value request response bytes on the line (hexadecimal) description bytes on the line (hexadecimal) description (silence for 3.5 bytes) start of modbus rtu frame (silence for 3.5 bytes) start of modbus rtu frame f0 hex gmp25x address f0 hex gmp25x address 10 hex...

  • Page 122

    A.4 filtering factor modbus register 777 sets the co 2 filtering factor. The filtering factor affects the speed at which the latest co 2 measurement is integrated into the output of the probe. A new measurement is produced approximately every two seconds. By default, the filtering factor is set to 1...

  • Page 123

    Warranty for standard warranty terms and conditions, see www.Vaisala.Com/warranty . Please observe that any such warranty may not be valid in case of damage due to normal wear and tear, exceptional operating conditions, negligent handling or installation, or unauthorized modifications. Please see th...

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    Gmp252 user guide m211897en-d 122.

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    Www.Vaisala.Com.