Instruction Manual
ExTox Bio-Compact
BA_Bio-Compact_e_2015-10-22.doc
Page 9 of 12
Calibration is done in five phases:
Phase Indication on Display Course
1
RINS AIR
The system is flushed with air for three minutes
2
READ ZERO
The gas suction pump is switched off. The system waits
one minute until stabilisation of measured values. Then
the measured values are stored (zero point values for CH
4
,
H
2
S or 20.9 % (v/v) for O
2
).
3
RINS GAS
The gas suction pump is switched on again and the system
is flushed with connected test gas for four minutes.
Attention: Only during this phase the test gas bottle has
to be connected and the test gas has to be applied to the
system. The test gas has to be applied pressure less. It
has always to be ensured that an adequate test gas vol-
ume stream is provided, that means an application of test
gas has to be set which corresponds to the one in measur-
ing operation
3
. This is to avoid that air is additionally
sucked in and dilution of the test gas resulting from this
falsifies calibration / adjustment.
4
READ SENS
The measured gas pump is switched off and batch meas-
urement is done within two minutes.
5
READY
Calibration is completed and a plausibility check of the
new values for zero point and sensitivity takes place. Off-
set for the zero point may not exceed ± 2 mA. The gain
factor for sensitivity has to be between 0.5 and 2 (see
comments on adjustment of the control units). Calibration
values outside these limits are rejected, in the calibration
menu the message "ERROR" is issued after completed
calibration and the previous settings are kept.
Attention: The message "ERROR" for channels with
measuring components which are not part of the test gas
does not indicate a malfunction of the measuring channel.
These measuring channels will be calibrated and adjusted
later on or have already been calibrated and adjusted on
application of other test gases.
When using several test gases please change now the bottle and start another calibration cycle
by pressing START.
Calibration is definitely completed with ESC.
3
Depending on type the necessary test gas volume stream may be considerably above the indicated volume stream.