LumaSense Technologies INNOVA 1314i - Manual (Page 187)

Chapter 14
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BE6030-12 1314i Photoacoustic Gas Monitor LumaSense Technologies A/S
Page 187 of 199
14.3 “Invalid” Calibration Messages
The messages listed below indicate: (1) that the calibration factor
calculated during the calibration task you have just performed is not
valid and therefore has not been stored in any filter bank; and (2) that
the calibration task must therefore be repeated.
ZERO-POINT CALIBRATION INVALID*
HUM. INTERFERENCE CALIBRATION INVALID*
ZERO-POINT/HUM. INTERF. CALIB. INVALID*
GAS X* SINGLE-POINT CALIB. INVALID*
GAS X* TWO-POINT CALIBRATION INVALID*
14.4 Error Messages Displayed when the INFO
button is used
All “successful*” or “invalid” calibration messages are marked with an
asterisk (*) which tells you that more detailed information about the
calibration can be obtained by pressing INFO. The messages
displayed when INFO is pressed are listed and explained below.
14.4.1 “Invalid” Error Messages
MISSING MEASUREMENT DATA
This message indicates that the Monitor does not have the necessary
data to calculate absolutely valid calibration factors. This situation
could, for example, be caused by too much noise in the analysis
chamber. The calibration task will have to be repeated.
WATER VAPOUR MEASUREMENT < OFFSET
This message is associated with either (1) a span calibration of the
water-vapour filter, or (2) a humidity-interference calibration.
This message indicates that the signal measured with a particular
filter, when water-vapour of known concentration is in the analysis
cell, is less than the signal measured in the cell when zero-gas is in
the cell. This could indicate either:
· That the gas used during the zero-point calibration of the filter was
not dry;
or
· That the water vapour used during either the span calibration of the
water-vapour filter; or the humidity-interference calibration, was
not wet enough.