INFICON Sensistor ISH2000 Hydrogen Leak Detector - Manual (Page 63)

EN- 63 Sensistor ISH2000 Technical Reference Manual (TRM)
C 305
C 305 Reference values settings
Reference value with reference leak
When measuring leak flow you will, in normal cases, calibrate the detector with
a reference leak.
Set the Reference Value equal to the calibrated flow of your reference leak.
This value can be found on the calibration certificate issued for the leak. Also
set the Reference Unit to the same unit as that used to express the leak rate of
the reference leak.
Example: Reference leak rate is 4.2E-5 mbarl/s.
1- Set Reference Value = 4.2E-05.
2- Set Reference Unit = “mbarl/s
Reference value with reference gas
When measuring hydrogen concentration (instead of leak flow) in most cases
you will calibrate the detector to a reference gas with a known concentration.
Set the Reference Value equal to the Hydrogen concentation in your reference
gas. This can be found on the certificate of analyis issued for the gas. Also set
the Reference Unit to the same unit as that used to express the leak rate of
the reference leak.
Example: Reference gas contains 10 PPM Hydrogen in synthetic air.
1- Set the Reference Value = 10
2- Set the Reference Unit = “PPM”