INFICON Sensistor ISH2000 Hydrogen Leak Detector - Manual (Page 62)

Sensistor ISH2000 Technical Reference Manual (TRM) EN- 62
C 304
C 304 Correlation value
If you want to use another unit you have to put a recalculation number into
Correlation Value which describes the relationship between the different
units.
This might be necessary when you want to display Reject Level unit other than
the reference leak rate unit.
Useful also for correct the value when volume and time affect the measure
value result in accumulation test.
Example:
To use mbarl/s as an calibrate reference unit and mm3/s as a analysis Unit you
have to set a Correlation Valus to 1.00E-03.