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Vaisala GMD110 User Manual

Vaisala GMD110 User Manual

Duct carbon dioxide transmitter
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M212885EN-B
User Guide
Duct Carbon Dioxide Transmitter
GMD110

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Summary of Contents for Vaisala GMD110

  • Page 1 M212885EN-B User Guide Duct Carbon Dioxide Transmitter GMD110...
  • Page 2 English versions are This product contains software developed applicable, not the translations. by Vaisala or third parties. Use of the The contents of this document are subject software is governed by license terms and to change without prior notice.

  • Page 3: Table Of Contents

    Table of contents About this document..................7 Version information..................7 Related manuals....................7 Documentation conventions................8 Trademarks......................8 Product overview.................... 9 Introduction to GMD110 Duct Carbon Dioxide Transmitter......9 2.1.1 GMD110 basic features................9 GMD110 transmitter parts................10 Analog output overrange behavior..............11 Safety........................ 12 2.4.1 ESD protection..................12...
  • Page 4 GMD110 User Guide M212885EN-B Maintenance....................35 Cleaning......................35 Changing the filter..................35 Calibration and adjustment................36 7.3.1 Calibration setup..................36 7.3.2 Limits of adjustment................37 7.3.3 DRW244827SP calibration adapter............37 Troubleshooting.................... 38 Problem situations..................38 Error messages....................39 Analog output error state................40 Technical data....................

  • Page 5: List Of Figures

    RS-485 wiring....................18 Figure 8 Termination and bias resistors on the RS-485 bus......... 19 Figure 9 Connecting GMD110 transmitter to Insight PC software....... 21 Figure 10 Insight main menu and settings..............22 Figure 11 Analog output configuration options in Insight ........23 Figure 12 Insight calibration view.................

  • Page 6: List Of Tables

    Table 4 GMD110 error messages................... 39 Table 5 GMD110 measurement performance.............42 Table 6 GMD110 operating environment..............43 Table 7 GMD110 inputs and outputs................43 Table 8 GMD110 compliance..................44 Table 9 GMD110 mechanical specifications............... 44 Table 10 GMD110 accessories and spare parts............45 Table 11 Default Modbus serial communication settings........

  • Page 7: About This Document

    Chapter 1 – About this document 1. About this document 1.1 Version information This document provides detailed instructions for installing, using, and maintaining Vaisala GMD110 Duct Carbon Dioxide Transmitter. Table 1 Document versions (English) Document code Date Description M212885EN-B September This document. 2023 Updated sections: •...

  • Page 8: Documentation Conventions

    Lists tools needed to perform the task. Indicates that you need to take some notes during the task. 1.4 Trademarks Vaisalaâ and CARBOCAPâ are registered trademarks of Vaisala Oyj. Windowsâ is either a registered trademark or trademark of Microsoft Corporation in the United States and other countries.

  • Page 9: Product Overview

    2.1 Introduction to GMD110 Duct Carbon Dioxide Transmitter GMD110 is a high-accuracy duct transmitter for measuring carbon dioxide in air‑handling systems and ventilation ducts. The transmitter is equipped with the renowned CARBOCAPâ sensor that has unique accuracy and measurement stability, which supports precise and reliable controls of HVAC systems even in demanding conditions and sites.

  • Page 10: Gmd110 Transmitter Parts

    GMD110 User Guide M212885EN-B 2.2 GMD110 transmitter parts Figure 1 GMD110 transmitter parts Filter (sintered, PTFE) Measurement cuvette with optics and CARBOCAPâ CO sensor Probe body Screws (4 pcs) for opening the transmitter cover Duct gasket Transmitter base Transmitter cover Cable glands with sealing tab (M16×1.5 lead-through, cable diameter 4 ... 8 mm...

  • Page 11: Analog Output Overrange Behavior

    Chapter 2 – Product overview Figure 2 GMD110 transmitter base parts Screw terminals for 24 V DC power supply input Output mode switch Service port (M8 4-pin A-coded male) Screw terminals for analog output Screw terminals for digital output 2.3 Analog output overrange behavior The analog output has a defined behavior when the measurement is outside the scaled analog output range.

  • Page 12: Safety

    2.4.1 ESD protection Electrostatic discharge (ESD) can damage electronic circuits. Vaisala products are adequately protected against ESD for their intended use. However, it is possible to damage the product by delivering electrostatic discharges when touching, removing, or inserting any objects in the equipment housing.

  • Page 13: Installation

    Chapter 3 – Installation 3. Installation 3.1 Duct mounting overview 90° minimum 160 mm (6.29 in) Figure 3 Duct mounting overview 1. Check that the duct diameter is suitable for the probe body. The minimum diameter of the duct is 160 mm (6.29 in). Ideally, the sensor should be installed in the middle of the duct. 2.
  • Page 14 GMD110 User Guide M212885EN-B 1. Open the 4 screws on the transmitter cover and remove the cover. 2. Attach the input/output wiring to the screw terminals on the transmitter component board. Tighten cable glands firmly after wiring. 3. Select an installation location for the transmitter on the duct surface and drill a...
  • Page 15 Chapter 3 – Installation 4. Push the probe through the hole on the duct until the duct gasket meets the duct. Check that the duct gasket sits tightly over the installation hole. If the duct has a negative pressure, external air can be drawn into the duct and affect the measurement if the installation hole is not sealed tightly.

  • Page 16: 243261Sp Mounting Flange

    3.2.1 243261SP mounting flange The optional flange accessory can be used to install the probe through a surface. Figure 4 GMD110 with 243261SP mounting flange 4 Phillips head screws (included) Mounting flange (diameter 60 mm (2.36 in)) with four Ø 4.2 mm (Ø 0.17 in) screw holes Gasket ring 3.3 Wiring...

  • Page 17: Figure 5 Current Output Wiring

    Chapter 3 – Installation RS485− RS485+ V OUT Controller I OUT − 24 VDC Power supply Figure 5 Current output wiring RS485− RS485+ V OUT Controller I OUT − 24 VDC Power supply Figure 6 Voltage output wiring Wiring with digital output •...

  • Page 18: Rs-485 Termination And Biasing

    ‣ RS-485 termination and biasing (page 18) 3.3.1 RS-485 termination and biasing When using the RS-485 output of the GMD110, you must install the appropriate termination and bias resistors on the RS-485 bus to ensure reliable data transmission and attain the rated EMC performance of the device.

  • Page 19: Figure 8 Termination And Bias Resistors On The Rs-485 Bus

    Chapter 3 – Installation GMD110 GMD110 Stub BIAS RS-485+ RS-485+ GMD110 Bus master RS-485- RS-485- Figure 8 Termination and bias resistors on the RS-485 bus Termination resistor Bias resistor for connecting the RS-485+ line to a 5 V power supply Bias resistor for connecting the RS-485- line to ground...

  • Page 20: Using Transmitter With Insight Pc Software

    • Computer with a Microsoft Windowsâ operating system (64-bit version) and Vaisala Insight PC software installed • Crosshead screwdriver • Vaisala Indigo USB adapter (Vaisala item code USB2) and M12 - M8 service cable (Vaisala item code 262195) • Vaisala USB Device driver installed...

  • Page 21: Figure 9 Connecting Gmd110 Transmitter To Insight Pc Software

    Chapter 4 – Using transmitter with Insight PC software Figure 9 Connecting GMD110 transmitter to Insight PC software M8 connector of the service cable M12 connector of the service cable USB adapter 1. Open the 4 screws on the transmitter cover and remove the cover.

  • Page 22: Insight Main View

    GMD110 User Guide M212885EN-B 4.3 Insight main view Figure 10 Insight main menu and settings Select to access Insight main menu. • Configure device: communication settings, analog output settings, Modbus configuration and filtering factor. • Export settings: creates a text file export of the device settings.

  • Page 23: Configuring Analog Outputs With Insight

    Chapter 4 – Using transmitter with Insight PC software 4.4 Configuring analog outputs with Insight Figure 11 Analog output configuration options in Insight 1. Connect the transmitter to Insight. See Connecting to Insight PC software (page 20). 2. Select > Configure device. 3.

  • Page 24: Figure 12 Insight Calibration View

    GMD110 User Guide M212885EN-B Figure 12 Insight calibration view 1. Connect the transmitter to Insight. See Connecting to Insight PC software (page 20). 2. Select > Calibrate > CO₂ adjustment. 3. Insert the probe head in the calibration adapter. 4. Connect the calibration gas into the inlet port of the calibration adapter. Adjust the flow to 1 l/min.

  • Page 25: Setting Filtering Factor With Insight

    Chapter 4 – Using transmitter with Insight PC software 4.6 Setting filtering factor with Insight Figure 13 Filtering factor configuration view 1. Select > Configure device > Measurement > Filtering factor. 2. Enter a filtering factor below 100 to apply filtering to the output (range: 1 … 100). Examples of the effect of filtering on output: •...

  • Page 26: Using Transmitter With Indigo80 Handheld Indicator

    5.1 Indigo80 handheld indicator Figure 14 Indigo80 handheld indicator Vaisala Indigo80 Handheld Indicator is a portable diagnostics tool that accommodates up to two Vaisala Indigo-compatible probes or transmitters for measuring a wide range of parameters. With the indicator, you can: •...

  • Page 27: Connecting To Indigo80 Handheld Indicator

    5.2 Connecting to Indigo80 handheld indicator • Crosshead screwdriver • M12 - M8 service cable (Vaisala item code 262195) CAUTION! The service port connection is only intended for temporary use during configuration, and must not be used for permanent installations.

  • Page 28: Figure 17 Connecting Gmd110 Transmitter To Indigo80 Handheld Indicator

    GMD110 User Guide M212885EN-B Figure 17 Connecting GMD110 transmitter to Indigo80 handheld indicator M12 - M8 service cable M12-5F ports on the bottom of Indigo80 for connecting compatible Vaisala devices. Ports are labeled Probe connection cable Probe connected to Indigo80 1. Open the 4 screws on the transmitter cover and remove the cover.

  • Page 29: Configuring Transmitter Features With Indigo80 Handheld Indicator

    5.3 Configuring transmitter features with Indigo80 handheld indicator • Crosshead screwdriver • M12 - M8 service cable (Vaisala item code 262195) You can use the Indigo80 handheld indicator to configure transmitter features such as filtering factor, analog outputs, and communication. 1. Check the position of the output mode switch. The output mode switch must be set to Digital to enable the service port.

  • Page 30: Co2 Adjustment With Indigo80

    M212885EN-B 5.4 CO2 adjustment with Indigo80 • Crosshead screwdriver • M12 - M8 service cable (Vaisala item code 262195) 1. Connect the transmitter to the indicator. 2. Wait for the indicator to detect the transmitter. 3. Open the main menu by pressing 4.

  • Page 31: Using Transmitter With Mi70 Handheld Indicator

    You can select the port freely based on your set of connected devices. 6. Turn on the MI70 indicator (time and date are requested at first startup). MI70 detects GMD110 and proceeds to show the measurement screen. MI70 will start to show valid measurement results from GMD110 after a few seconds.

  • Page 32: Basic Display

    GMD110 User Guide M212885EN-B 6.3 Basic display Figure 18 MI70 basic display Measured parameter and compensations (up to three items on display simultaneously). You can change the shown items in Main menu > Display > Quantities and units. Battery indicator. Shows current status (charge) of the battery.

  • Page 33: Holding And Saving The Display

    Chapter 6 – Using transmitter with MI70 handheld indicator 1. Go to the basic display. 2. Press any arrow button, then select Open (must be pressed within 5 seconds or the indicator returns to the basic display). 3. Move in the menus using the buttons.

  • Page 34: Recording Data

    GMD110 User Guide M212885EN-B 6.7 Recording data With MI70, you can record transmitter measurement data over a certain period at chosen intervals. These recordings are saved in the MI70 memory and are available even after MI70 is disconnected from the transmitter. To start recording, select the Record function key in the basic display, or navigate to the recording menu: Main menu >...

  • Page 35: Maintenance

    Chapter 7 – Maintenance 7. Maintenance 7.1 Cleaning You can clean the transmitter and probe body by wiping them 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. •...

  • Page 36: Calibration And Adjustment

    • GMD110 does not use configurable environmental compensation so it is not necessary to adjust the device settings before calibration. Performing an accurate calibration and adjustment takes some time and preparation.

  • Page 37: Limits Of Adjustment

    Chapter 7 – Maintenance When supplying the gas from a gas bottle, make sure the gas bottle has stabilized to room temperature before starting. 7.3.2 Limits of adjustment The transmitter limits the amount of adjustment that is allowed to the CO measurement.

  • Page 38: Troubleshooting

    GMD110 User Guide M212885EN-B 8. Troubleshooting 8.1 Problem situations Problem Possible cause Remedy measurement output Installation location is not Verify the installation location representative of actual and relocate the transmitter if seems incorrect. conditions you want to necessary. See Duct mounting measure.

  • Page 39: Error Messages

    For example, a completely wet humidity sensor may cause a humidity measurement error. • Warnings do not prevent normal operation but may indicate possible problems. • Status indicates a known state of the device. Table 4 GMD110 error messages Error message Description Recommended action Critical errors Firmware checksum mismatch.

  • Page 40: Analog Output Error State

    GMD110 User Guide M212885EN-B Errors Sensor signal distorted. [210] Hardware fault. Contact Vaisala technical support. Internal voltage out of range. [208] Sensor heater failure. [212] Infrared source temperature out of range. [213] Warnings Sensor signal low. [209] Low optical signal level. Can be...
  • Page 41 Chapter 8 – Troubleshooting Output Default error level 0 ... 5 V 0 ... 10 V The transmitter resumes normal operation of the analog output when the cause of the error state is removed.

  • Page 42: Technical Data

    GMD110 User Guide M212885EN-B 9. Technical data 9.1 GMD110 specifications Table 5 GMD110 measurement performance Property Description/value Measurement range 0 … 10 000 ppm CO Orderable with analog output scaled to 0 … 2000 ppm, 0 … 5000 ppm, or 0 … 10 000 ppm Accuracy 0 …...

  • Page 43: Table 6 Gmd110 Operating Environment

    M8 4-pin male Compatibility • Indigo80 handheld indicator • MI70 handheld indicator • Vaisala Insight PC software Requires M12-M8 cable 262195SP. Requires connection cable 219980SP. Requires USB adapter USB2 with M12-M8 cable 262195SP. Vaisala Insight software for Windows is available at www.vaisala.com/insight.

  • Page 44: Table 8 Gmd110 Compliance

    EMC Directive (2014/30/EU) RoHS Directive (2011/65/EU) amended by 2015/863 Electromagnetic compatibility (EMC) EN 61326‑1, basic electromagnetic environment Compliance marks CE, RCM Table 9 GMD110 mechanical specifications Property Description/value Probe diameter 25 mm (0.98 in) Probe length 126 mm (4.96 in) Weight 215 g (0.47 lb)

  • Page 45: Accessories And Spare Parts

    167 [6.57] 72 [2.83] 126 [4.96] 42 [1.65] mm [in] Figure 21 GMD110 dimensions 9.2 Accessories and spare parts Table 10 GMD110 accessories and spare parts Item Item code Probe mounting flange 243261SP Conduit fitting + O-ring (M16 × 1.5 / NPT1/2") 210675SP Conduit fitting + O-ring (M16 ×...

  • Page 46: 243261Sp Mounting Flange Dimensions

    GMD110 User Guide M212885EN-B 9.3 243261SP mounting flange dimensions 36 [1.41] mm [in] Figure 22 243261SP mounting flange dimensions Ø 60 [2.36] Ø 36 [1.41] Ø 25.6 [1.008] Ø 28.5 [1.12] mm [in] Ø 42 [1.65] Figure 23 243261SP mounting flange dimensions, cross section...

  • Page 47: Appendix A. Modbus Reference

    Appendix A – Modbus reference Appendix A. Modbus reference A.1 Default communication settings Table 11 Default Modbus serial communication settings Property Description/Value Serial bit rate 19200 Parity Number of data bits Number of stop bits Modbus device address A.2 Function codes Table 12 Modbus function codes Function code (decimal) Function code (hexadecimal) Name...

  • Page 48: 16-Bit Integer Format

    GMD110 User Guide M212885EN-B Despite the specification, some Modbus masters may expect a "big-endian" word order (most significant word first). In such case, you must select "word-swapped" floating point format in your Modbus master for the Modbus registers of the device.

  • Page 49: Measurement Data Registers

    Appendix A – Modbus reference A.4.1 Measurement data registers Table 14 Modbus measurement data registers (read-only) Register Address Description Data format Unit number 0000 Measured CO value 32-bit float 0002 Compensation T 32-bit float °C 0004 Measured T 32-bit float °C 0100 Measured CO value 16-bit signed integer ppm (up to 32 000 ppm) 0101...

  • Page 50: Status Registers

    GMD110 User Guide M212885EN-B Register Address Description Data format Unit / Valid range number 0308 filtering 16-bit Valid range 0 ... 100 integer factor (default: 100 (no filtering)). For information on setting the filtering factor, see Filtering factor (page 51).

  • Page 51: Exception Responses

    Appendix A – Modbus reference Object ID Object ID Object name Example contents (hexadecimal) VendorUrl "http://www.vaisala.com/" ProductName "GMD110 Duct Carbon Dioxide Transmitter" "K0710040" SerialNumber "2020-01-31" CalibrationDate Calibration date in YYYY-MM-DD format. Empty string if not set/valid. "Vaisala/HEL" CalibrationText Calibration information text. Empty string if not set/valid.
  • Page 52 GMD110 User Guide M212885EN-B To apply filtering, you need to set a filtering factor that determines how much the previous measurements affect the calculation of measurement output. For example, when using filtering factor of 0.1, the new output is a combination of previous measurements (90 %) and the latest measurement (10 %).

  • Page 53: Maintenance And Calibration Services

    Maintenance and calibration services Vaisala offers comprehensive customer care throughout the life cycle of our measurement instruments and systems. Our factory services are provided worldwide with fast deliveries. For more information, see www.vaisala.com/ calibration. • Vaisala Online Store at store.vaisala.com is available for most countries.
  • Page 56 www. v aisala.com...

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