INFICON Sensistor ISH2000 Hydrogen Leak Detector - Manual (Page 83)

EN- 83 Sensistor ISH2000 Technical Reference Manual (TRM)
E 130
h. Acceptance level for new sensor is minimum 1.2 = 1.20E+00.
i. If the Signal is below 1.2: Wait at least 10 minutes (leave instrument on)
and then repeat the test. If the Signal (after a repeated test) is still below
1.2 the sensor is to be considered no good for delivery.
Sensitivity fault analysis
The following questions below are useful to detect a problem.
Figure E-4: Sensitivity fault analysis
Type of
problem?
Quick or
slow
signals?
Electrical fault.
Bad cable or
connector, or
earthing problem .
This is most
likely a handling
error by
customer.
Check for gas spillage
in the background.
(could be exhausts,
smoke, tracer gas or
gastric gases ) .
This is an application
problem. Not a
warranty issue.
Low sensitivity False signals
>5 sec . < 1 sec.
Detector
message:
“Check
Sensor,
Voltage Error”
Yes
No
1 -
5
sec.
No explanation No explanation
* Service Mode Signal is read in Service Mode. See instructions for Sensitivity Test
Frequent unexplained
Service Mode Signals*
above 0.18 that can be
confirmed at the service
center are grounds for
warranty replacement.
The Reject level
should have been
designed to 10 ppm
H2 or more.
For Reject levels
it is normal to change
sensor 1-2 times per
year.
Detector
message:
“ Check
Probe and
Cable?”
Yes
Detector
message:
“ Check
Sensor, Temp”
Yes Check that the sensor
is properly connected
to the probe. Refer to
D 200 General trouble
-shooting guide.
Check that the sensor
is properly connected
to the probe.Refer to
D 200 General trouble
-shooting guide
Check that the probe
cable is properly
connected to the probe
and the instrument.