Hydrogen leak detector Sensistor ISH2000
-
Operating Manual
OM-Sensistor ISH2000-EN-201304
25
EN
Note:
If calibration fails you can still use the instrument. Last valid calibration
parameters will be used. You should, however, check that the instrument
reacts to the Calibration leak/gas.
Calibration Value
Your Calibration should have a concentration or flow equal to or slightly above
what you want to measure. See the examples below for specific recommendations.
Example for Calibration gas:
•
Reject Level
is set at 8 ppm
•
For good accuracy, use a Calibration gas between 5-80 ppm hydrogen.
•
8 ppm hydrogen in synthetic air will give best results.
Example for Calibration leak
•
Reject Level
is set at 2.0E-4 atm. cc/s
•
For best accuracy use Calibration leak within 2.0E-4 - 2.0E-3 atm cc/s.
•
A Calibration leak calibrated to 2.0E-4 atm. cc/s will give best accuracy.
Calibration Unit
The
Calibration Unit
is set in the
Calibration
menu. Select ppm, cc/s, cc/min, SCCM, g/yr,
oz/yr, mbarl/s, mm
3
/s, mm
3
/min, Pa m
3
/s or Custom. When you select Custom you can
enter any unit as long as it contains a maximum of 12 characters.
No gas or unstable signal.
No gas signal or no stable
signal detected during
calibration.
Check if Calibration leak/
gas valve is shut.
Check that probe tip is
not clogged.
Signal when Calibration
gas is shut off. Happens
for Calibration gas only.
Check the calibrate gas
valve.
Background is higher
than Calibration gas
concentration.
Improve ventilation
Sensitivity too low for
Reject level
Sensitivity of sensor is too
low to guarantee correct
response to a gas flow or
concentration equal to
the Reject level. The most
likely reason is that
sensor is too old.
Check Calibration leak/
gas. Gas valve may be
shut.
Check that probe tip is
not clogged.
Check setting of Reject
Level.
Replace sensor if problem
remains.
High signal! Check
Calibration leak/gas!
Calibration leak/gas
signal is abnormally high.
Check that Calibration
gas mix is not replaced
with tracer gas mix.
Check condition of
Calibration leak.
Check that Calibration
leak connections has no
leaks.
Message
Explanation
Action
Summary of Contents for Sensistor ISH2000 HySpeed
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