Photoionization Detection (Pid) Sensors - Oldham OLCT 200 User Manual

9.2.3 IR-CO2 Sensor
The CO2 IR sensor is factory configured to accurately monitor Carbon Dioxide gas.
The output of the IR sensor can be disrupted by sudden changes in temperature. If
there is an excessive change in the ambient temperature, gas sample temperature or
flow rate, then the output signal will be monmentarily frozen. Correct operation is
restored when the effects of the transient have settled. Rates of change in the ambient
temperature should be restricted to 2C/minute and gas flow rates kept below 0.6
L/minute.
Extreme pressure variations will cause errors in readings. The unit should be
recalibrated if the atmospheric pressure change is greater than 10% from the orignial
pressure.
Do not expose the sensor to corrosive gases such as Hydrogen Sulphide.
Do not allow condenseation to occur inside the sensor.
9.2.4 IR-Ethylene Sensor
The Ethylene IR sensor is factory configured to accurately monitor Ethylene gas.
The output of the IR sensor can be disrupted by sudden changes in temperature. If
there is an excessive change in the ambient temperature, gas sample temperature or
flow rate, then the output signal will be monmentarily frozen. Correct operation is
restored when the effects of the transient have settled. Rates of change in the ambient
temperature should be restricted to 2C/minute and gas flow rates kept below 0.6
L/minute.
Extreme pressure variations will cause errors in readings. The unit should be
recalibrated if the atmospheric pressure change is greater than 10% from the orignial
pressure.
Do not expose the sensor to corrosive gases such as Hydrogen Sulphide.
Do not allow condenseation to occur inside the sensor.

9.3 Photoionization Detection (PID) Sensors

Factory Default Settings
Ref
Gas
#
Volatile
30 Organic
Compounds
! Caution ! Note on Silicones:
PIDs are not permanently damaged by Silicones but they can potentially harm the
windows of the lamps and reduce response to some gases. This can usually be
Resolutio
Range
n
0-500ppm 1 ppm
OLCT 200 User Manual | 72
Cal Gas Low Alarm
100 ppm
100 ppm
(Isobutylene)
High
Alarm
200 ppm