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BG 5034 BEN (2017-01) IMR420_430.oi
4 Operation
Each IMR 420 / IMR 430 gauge head has been individually calibrated in the course
of final factory testing. This ensures a high accuracy of the pressure readout.
In order to calibrate making use of the calibration factor given on the sticker in the
Operating Instructions ( "Sticker", 2), it is required to set the IMG 400 operating
unit to "Cal_Full". Calibration process Operating Instructions BG 5520 BEN for
the IMG 400.
In the presence of halogen gases like fluorine, chlorine, bromine and
iodine and their compounds, the yttrium oxide coating will suffer rapid
wear. As a result of this, the cathodes will burn out.
Caution
Humidity at the insulators (2/14) caused by condensing water for ex-
ample, can give rise to incorrect measurements due to leakage
currents.
Calibration
Operation