Envent 331S - Sample Conditioning System Issues; Calibration Issues

Envent Engineering Ltd. Page 43 Revision 2.4
Sample Conditioning System Issues (cont’d)
Problems
Possible Reasons
Possible Solutions
Pressure gauge
not working
Over pressured gauge Replacement is required. Consult Envent
Engineering Ltd for replacement.
Flowmeter not
working
Liquid carried over into
flowmeter
Consult Envent Engineering Ltd.
Frozen
humidifier
Analyzer is being exposed to
temperatures below 0 degress
°C (or - 2 degress °C if 5%
acetic acid is used)
Do not expose analyzer to temperatures
below 0 degress °C or - 2 degress °C
Humidifier
leaking liquid
The humidifier body cracked -
Could be due to extreme
temperature changes.
A replacement may be required. Consult
Envent Engineering Ltd for a replacement.
Calibration Issues
Problems
Possible Reasons
Possible Solutions
Change gain
more than +/-
25% from
original gain
after calibration
Not using the right calibration
bottle
Make sure the calibration bottle is within
analyzer range. It is recommended that
calibration gas used is close in value to
where the alarm setpoint values need to be
(for more accuracy).