Specifications

100 Commerce Way, Woburn, MA 01801
TEL: 1-888-VAISALA (824-7252) FAX: [phone]
E-MAIL: [e-mail] Access catalog on-line at: www.vaisala.com/inc/ssdcat
80
TECHNICAL DATA - GMM 20W
CARBON DIOXIDE
Measurement range 0...2000 ppm
(can be recalibrated for other ranges:
0...5,000 ppm, 0...10,000 pppm, 0...20,000 ppm)
Accuracy at 77°F (+25°C) <±(1% FS+ 1.5% of reading
(incl. nonlinearity and calibration uncertainty)
Repeatability <1% FS
Temperature dependence of output 0.1%FS
Long-term stability <5 %FS/5 years
(in ambient conditions)
Response time 1 minute
(0...63% response)
GENERAL
Output signals 0...20 mA or 4...20 mA and 0...10 V
Optional outputs relay
LonWorks
®
interface
Recommended external load:
current output max. 500 Ohm
voltage output min. 1 kohm
Power supply nominal 24 VDC/VAC
(18...30 VDC)
Power consumption <2.5 W
Warm-up time <5 minutes
Operating temperature range +23...113°F (-5...+45 °C)
Operating humidity range
short term 0...100 %RH non-condensing
long term 0...85 %RH non-condensing
Air flow range 010m/s
Weight 56 g
Dimensions (l x h x d) 72 x 74 x 19 mm
ACCESSORIES/OPTIONS
GMI 21 display and relay option
GMR 20 relay output option
GML 20 LonWorks
®
module with CO
2
signal
GML 20T LonWorks
®
module with both CO
2
and temperature signals
19222GM calibration software kit
(disk and serial COM adapter)
18192GM field calibration kit
(used with Vaisalas portable CO
2
meters.)
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