INFICON Sensistor ISH2000 Hydrogen Leak Detector - Manual (Page 21)

Hydrogen leak detector Sensistor ISH2000 - Operating Manual
OM-Sensistor ISH2000-EN-201304 21
EN
3- Set Leak Gas = Helium
Note: Feed the Calibration leak with hydrogen tracer gas at the pressure stated on
the Calibration certificate. If another pressure is used you must correlate the
resulting flow and use this value as
Calibration Value .
Note: The resulted concentration from the Calibration leak should be within the
concentration range of 5 ppm - 400 ppm H
2.
7.6 Calibration value with Calibration gas
When measuring hydrogen concentration (instead of leak flow) in most cases you
will calibrate the detector to a Calibration gas with a known concentration.
Set the Calibration Value equal to the Hydrogen concentration in your Calibration
gas. This can be found on the certificate of analysis issued for the gas. Also set the
Calibration Unit to ppm.
Example: Calibration gas contains 10 ppm Hydrogen in synthetic air.
1- Set the Calibration Value = 10
2- Set the Calibration Unit = “PPM”