OPTOSENSE LLC
Design Department
USER
MANUAL
SMALL-SIZE EXPLOSIVE GAS MEASURING SENSOR MIPEX-02-
Х-X-X.1 X
File name: ESAT.413347.006 UM v.2.0.docx
Revision 2.0 27 August 2015
Page. 30 of 38
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WITHOUT THE WRITTEN PERMISSION OF OPTOSENSE LLC IS PROHIBITED.
C.3.3. Sensor setting and calibration commands
The commands shown in Table 11 are used during sensor calibration. The procedure and used equipment described in Sensor zeroing.
Table 11. Calibration and zeroing commands
Command in
OEM mode
Available in
USER mode
Command name
Response
Description
AZERO ON
No
Turn on autozeroing algorithm.
AZERO ON
From the firmware ver.2x.6 introduced new autozeroing algorithm
and the possibility to adjust the temperature coefficients by user.
Autozeroing is embedded in self-diagnostics algorithm of the sensor.
It starts after sensor is powered up. Self-diagnostics is operating
during the sensor is on. If anyway, zero shift is observed, manual
zeroing procedure is recommended.
AZERO OFF
No
Turn off autozeroing algorithm.
AZERO OFF
AZERO?
No
Check current autozeroing status.
AZERO ON
or
AZERO OFF
CALB
AAAA
No
Span gas calibration.
CALB AAAA
OK
or
CALB
AAAA FAULT
AAAA
is CGM concentration value in %Vol.*100. For example,
AAAA
=0198 corresponds to 1,98 %Vol. Entered value must not be
different from current readings more than 20 times with regard to all
units converted to %Vol. CGM concentration must be more than
0,2% Vol. If these conditions are not accomplished, sensor responds
CALB AAAA FAULT
. Scaling procedure should be used for following
purpose:
-
Quick switch between readings in % vol. or % LEL.
-
Setup known cross-coefficients for measuring other heavy
hydrocarbons gases (CnHm).
CALB1
XXXXX
No
Write scale coefficient for
concentration for range 0-5% Vol.
(CH4).
CALB1 XXXX
OK
XXXXX
– value of scale coefficient, 10000 corresponds to unitary
coefficient.
CALB2
XXXXX
No
Write scale coefficient for
concentration range 5-100% Vol.
(CH4).
CALB2 XXXX
OK
CALB3
XXXXX
No
Write scale coefficient for whole
concentration range 0-100% Vol.
(CH4).
CALB3 XXXX
OK
