GMP252 specifications - GMP252

GMP252 User Guide
Document code
M211897EN
Revision
E
Language
English
Product
GMP252
Document type
User guide
Table 1. GMP252 measurement performance
Property Description/value
Measurement range 0 … 10 000 ppm CO2

(up to 30 000 ppm CO2 with reduced accuracy)
Accuracy 1
0 … 3000 ppm CO2 ±40 ppm CO2
3000 … 10 000 ppm CO2 ±2 % of reading
Up to 30 000 ppm CO2 ±3.5 % of reading
Calibration uncertainty
at 2000 ppm CO2 ±31 ppm CO2
at 10 000 ppm CO2 ±105 ppm CO2
Long-term stability
0 … 3000 ppm CO2 ±60 ppm CO2/year
3000 … 6000 ppm CO2 ±150 ppm CO2/year
6000 … 10 000 ppm CO2 ±300 ppm CO2/year
Temperature dependence 0 … 10 000 ppm CO2
With compensation, −10 … +50 °C ±0.05 % of reading/°C
With compensation, −40 … +60 °C < ±0.1 % of reading/°C
Without temperature compensation at 2000 ppm CO2 (typical) −0.5 % of reading/°C
Pressure dependence
With compensation at 0 … 10 000 ppm CO2, 500 … 1100 hPa ±0.015 % of reading/hPa
Without compensation (typical) +0.15 % of reading/hPa
Humidity dependence
With compensation, 0 … 10 000 ppm CO2, 0 … 100 %RH ±0.7 % of reading (at +25 °C (+77 °F))

Without compensation (typical)

+0.05 % of reading/%RH
O2 dependence
With compensation, 0 … 10 000 ppm %CO2, 0 … 90 %O2 ±0.6 % of reading (at +25 °C (+77 °F))
Without compensation (typical) −0.08 % of reading/%O2
Start-up, warm-up, and response time
Start-up time at +25 °C < 12 s
Warm-up time for full spec. < 2 min
Response time (T90):

With standard filter

< 1 min
Flow-through option with > 0.1 l/min 30 s
With spray shield < 3 min
Flow rate dependence (for flow-through option)
< 1 l/min flow No effect
1 … 10 l/min flow < 0.6 % of reading l/min
Table 2. GMP252 operating environment
Property Description/value
Operating temperature of CO2 measurement −40 … +60 °C (−40 … +140 °F)
Storage temperature −40 … +70 °C (−40 … +158 °F)
Humidity 0 … 100 %RH, non-condensing
Condensation prevention Sensor head heating when power on
IP rating, probe body

IP65: Dust-tight. Protected from water jets from any direction.
Chemical tolerance (temporary exposure during cleaning)
  • H2O2 (2000 ppm, non-condensing)
  • Alcohol-based cleaning agents (for example ethanol and IPA)
  • Acetone
  • Acetic acid
Pressure
Compensated 500 … 1100 hPa
Operating < 1.5 bar
Gas flow (for flow-through option)
Operating range < 10 l/min
Recommended range 0.1 … 0.8 l/min
Table 3. GMP252 inputs and outputs
Property Description/value
Analog outputs
  • 0 … 5/10 V (scalable), min. load 10 kΩ
  • 0/4 … 20 mA (scalable), max. load 500 Ω
Digital output Over RS-485:
  • Modbus
  • Vaisala Industrial Protocol
Operating voltage
With digital output in use 12 … 30 V DC
With voltage output in use 12 … 30 V DC
With current output in use 20 … 30 V DC
Power consumption
Typical (continuous operation) 0.4 W
Maximum 0.5 W
Table 4. GMP252 mechanical specifications
Property Description/value
Weight, probe 58 g (2.05 oz)
Connector type M12 5-pin male
Materials
Probe housing PBT polymer
Filter PTFE
Connector Nickel‑plated brass
Dimensions
Probe diameter 25 mm (0.98 in)
Probe length 130 mm (5.12 in)
Table 5. GMP252 compliance
Property Description/Value

EU directives and regulations

EMC Directive (2014/30/EU)

RoHS Directive (2011/65/EU) amended by 2015/863

Electromagnetic compatibility (EMC)

EN 61326‑1, basic electromagnetic environment

EMC emissions

CISPR 32 / EN 55032, Class B

Compliance marks

 CE, RCM
1 At 25 °C (77 °F) and 1013 hPa (incl. repeatability and non-linearity).