GMW80

GMW80 VAISALA | Alldatasheet

Document overview

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Technical content

Features

• Superior stability with the advanced proprietary CARBOCAPâ technology
• Improved accuracy due to low self-heating of microglow light source
• Modbus â RTU support over RS-485 with model GMW87 Vaisala CARBOCAPâ Carbon Dioxide, Humidity, and Temperature Transmitter Series GMW80 is based on Vaisala's patented latest-generation CARBOCAP technology with improved reliability and stability. The GMW80 series transmitters are designed to fulfill the needs for CO2 measurements in standard demand- controlled ventilation applications. Temperature measurement is included in most GMW80 series transmitters. Combined with humidity measurement, relay, and LED CO2 level indication, GMW80 series provides you the flexibility needed for a variety of projects. The CARBOCAP sensors measure CO2 accurately immediately when powered on. As they have a built-in reference measurement they do not need a lengthy learning phase before the measured values are correct. Proper operation can be verified immediately after snapping on the device cover. Easy installation With modern buildings often having hundreds of sensors, installation time per unit can be a significant cost factor. Returning to the building site to check sensor operation adds further costs. The GMW80 series transmitters include a number of subtle design features that have been introduced to make installation and commissioning quick and easy. The pull-out tab makes opening the transmitter faster than before, while also doubling as a quality check slip and holder for the anti-tamper screw. The backplate can be twisted onto pre- mounted screws, and the wiring can be done easily on the clearly marked backplate. The electronics can be snapped on later when the building automation system is commissioned. For measurements in more demanding conditions (for example, dusty or humid installation locations), the GMW87 and GMW88 models provide an IP64-rated enclosure with a cable gland. Reliable operation The GMW80 series transmitters are optimized for low maintenance. The unique, low-power CARBOCAP technology enables a longer lifetime and better stability than ever before. As the power consumption is low, the heat generated by the electronics does not distort the temperature inside the sensor. The internal reference in the CO2 sensor guarantees superior stability and flawless operation even in constantly occupied buildings, without the need for frequent readjustments. The reliable operation and accurate measurement values of the GMW80 series transmitters contribute to the significant cost savings brought by demand-controlled ventilation. Benefits
• Cost-efficient, affordable
• Reliable and maintenance-free operation for up to 15 years
• Easy to install, easy to use
• Versatile – works well in buildings occupied 24/7
• Ideal for demand-controlled ventilation

Model Meas. parameters Output CO2 range (ppm) GMW86P CO2+T Current and voltage output, Pt1000 0 … 2000 GMW83RP 1) CO2+RH+T Voltage outputs, Pt1000 0 … 2000 GMW83DRP 1) CO2+RH+T Voltage outputs, Pt1000, display with metric scale output 0 … 2000 GMW83 CO2+T Voltage outputs 0 … 2000 GMW83A CO2+T Voltage outputs, CO2 indicator LEDs 0 … 2000 GMW83D CO2+T Voltage outputs, display with metric scale output 0 … 2000 GMW84 CO2+T Current output 0 … 2000 GMW84S CO2+T Current output, relay 0 … 2000 GMW87 CO2 RS-485 Modbus RTU output 0 … 5000 GMW88 CO2 Current and voltage output 0 … 2000 / 0 … 5000 2) 1) Models with calibration certificate available (GMW83RPC/GMW83DRPC). 2) Range user-selectable with dip switch. Default range 0 … 5000 ppm. Measurement performance Carbon dioxide Measurement range 0 … 2000/5000 ppm (see table Models) Accuracy 1): at +20 … +30 °C (+68 ... +86 °F) ±(30 ppm +3 % of reading) ±(35 ppm +3.7 % of reading) ±(40 ppm +4.8 % of reading) Stability in typical HVAC applications ±(15 ppm + 2 % of reading) over 5 years Warm-up time 1 min 10 min for full specification Response time (63 %) 60 s 7 min (GMW87 and GMW88) Carbon dioxide sensor CARBOCAPâ GM10 Temperature Measurement range 0 … +50 °C (+32 ... +122 °F) Temperature sensor On P models: Pt1000 RTD Class F0.15 IEC 60751 For analog outputs: Digital temperature sensor Accuracy (GMW83 and GMW84): ±1 °C (1.8 °F) Humidity Measurement range 0 … 95 %RH Accuracy at temperature range +10 … +30 °C (+50 ... +86 °F): 0 … 80 %RH ±3 %RH 80 … 95 %RH ±5 %RH Accuracy at temperature ranges 0 … +10 °C (+32 ... +50 °F) and +30 … +50 °C (+86 ... +122 °F): 0 … 95 %RH ±7 %RH Stability in typical HVAC applications ±2 %RH over 2 years Product lifetime > 15 years 1) Accuracy applicable to 2000 ppm measurements at 1013 hPa pressure. Pressure or temperature dependencies not included in the values. Compliance EU directives EMC, RoHS EMC compatibility EN 61326‑ 1, industrial environment Compliance marks CE, RCM Operating environment Operating temperature 0 … +50 °C (+32 … +122 °F) Operating humidity 0 … 95 %RH Dew point < 30 °C (+86 °F) Storage temperature Models without display: –40 … +70 °C (−40 … +158 °F) Models with display: −30 … +70 °C (−22 … +158 °F) Inputs and outputs Supply voltage 18 … 35 V DC

24 V AC ±20 % 50/60 Hz

Max. current consumption at 18 V DC 45 mA 70 mA (GMW84 models) Max. power consumption at 30 V AC 0.7 W (GMW83 models)

1 W (GMW86 models, GMW87, and

GMW88)

1.2 W (GMW84 models)

(in GMW87 only) Isolated, supports Modbus RTU protocol

• Modbus RTU address range:
• 1 … 247 (up to 255 possible, non-standard)
• Bit rates:
• 4800, 9600, 19200, 38400, 57600, 76800, 115200
• Parity:
• None or Even
• Supports automatically both 1 and 2 stop bits Outputs 4 … 20 mA and/or 0 … 10 V 1) Current loop resistance (4 … 20 mA) 0 … 600 Ω Voltage output load resistance Min. 10 kΩ CO2 output scale 0 … 2000/5000 ppm Temperature output scale 0 … +50 °C (+32 ... +122 °F) Humidity output scale 0 … 100 %RH Passive temperature sensor (P models) Pt1000 RTD Temperature setpoint (T models) 10 kΩ potentiometer Relay (S models) 1 pc, SPST-NO Max. 50 V DC / 50 V AC, 500 mA CO2 indicator LED levels (A model) Flashing red: > 2000 ppm Red: 1200 … 2000 ppm Yellow: 800 … 1200 ppm Green: < 800 ppm 1) Analog outputs are not available in model GMW87. Mechanical specifications IP rating IP30 IP64 (GMW87 and GMW88) Housing material ABS/PC UL-V0 approved PC (GMW87 and GMW88) Housing color White (RAL9003) Output connector Screw terminal Max. wire size 2 mm2 (AWG14) Weight Plain and LED version: 114 g (4.02 oz) Display version: 124 g (4.37 oz) GMW87 and GMW88: 160 g (5.64 oz)

Spare parts and accessories CO2 module GM10SP80 INTERCAPâ humidity sensor 15778HM Universal AC power supply 245866 81.1 [3.2] 127.3 [5.0] 60 [2.4] 60.3 [2.4] 85 [3.3] mm [in] GMW83, GMW83A, GMW83RP, GMW84, GMW84S, GMW86P, GMW83D, and GMW83DRP dimensions (display in models with the letter D) 41 [1.6] 84 [3.3] 160 [6.3] 220 HFT 545 VS CO 4 ... 20 mA 0 ... 10 V CO CO SCREW TERMINAL WIRING 120 [4.7] M3.5 134 [5.3] mm [in] GMW87 and GMW88 dimensions Published by Vaisala | B211435EN-M © Vaisala 2021 All rights reserved. Any logos and/or product names are trademarks of Vaisala or its individual partners. Any reproduction, transfer, distribution or storage of information contained in this document is strictly prohibited. All specifications — technical included — are subject to change without notice. www.vaisala.com