E2638-CO2
Rev 10.05.2021
Operation
Turn on the power. The instrument warm-up time takes about 1 minute after switching on
and the final sensor stabilization time to maximum accuracy takes about 15 minutes. The
operating status is indicated by the LED on the PCB of the device. The control LED (red)
response to different processes is presented in the following table:
Mode
LED mode
During calibration mode or sensor heating
period (if activated)
0.5 Hz (50% on, 50% off)
Relay 1 turned on
Blinking 1 Hz (50% on, 50% off)
Relay 2 turned on
Blinking 2 Hz (50% on, 50% off)
During Modbus communication cycle
Short on-off pulses
Normal operating/measurement
Continuously on or off
Make sure that the detector-transmitter is properly mounted, the external devices
connected, power LED (green) on and control LED (red) constantly lit. Place the lid back
and fix it with the screws. The device is ready to use.
Maintenance
Do not perform any maintenance operation with the power on.
Clean the device with a soft damp cloth. Do not use any abrasive cleaning agents. Do not
immerse the device in water or any cleaning media.
Calibration
E2638-CO2 gas detector-transmitters have been calibrated by the Manufacturer with
standard gas mixtures before delivery. Provided that the sensor is used under moderate
conditions, the recommended interval for field recalibration is every 5 years. 50KN sensor
does not require recalibration. Please contact your dealer for more information.
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