Omega 3200ST - Manual (Page 24)

M-4271/0707, pg. 24 of 26
Symptom Possible Cause Method of Correction
Insufficient or varying power Check the power supply
output and increase if
necessary
Insufficient pressure Ensure the pressure (an
differential pressure) is high
enough o operate the unit.
Varying pressure Check the stability of the
pressure regulation and
improve if necessary.
Ambient temperature too high
or too low Place the unit in a suitable
environment
Output load resistance too low Ensure the voltmeter or
data acquisition system or
display has an impedance of
greater than of 2.5kohm
Gas temperature too high or
too low Ensure the gas temperature
is within the recommended
operating range
Inaccurate control
Unit damaged or faulty Contact Omega Engineering
Gas flow through unit not
completely stopped Ensure there is no flow
through the unit. The
easiest way to do this is to
plug both the inlet and
outlet.
Severe fluctuations in the
ambient temperature e.g. unit
in direct sunlight
Carry out the rezero
procedure in a stable
environment
Unstable power supply Check the stability and
suitability of the power
source
Problems with
rezeroing
Insufficient warm-up period Allow the unit to warm-up
for at least 5 minutes.