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. 34 of 38
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ANY REPRODUCTION
WITHOUT THE WRITTEN PERMISSION OF OPTOSENSE LLC IS PROHIBITED.
Appendix D. Sensor zeroing and calibration.
The setting of zero and calibration of the sensor is performed in the course of the primary
installation into a gas analyzer as well as annually during preparation to conducting a check. In any
cases the setting zero should be done before calibration.
The devices given in Fig. 9 and the CGM are used in the course of conducting operations.
The operations on setting zero and calibration of the sensor shall be carried out by a
qualified specialist outside of the explosion-hazardous zone at normal conditions.
PC
PC
Gas adapter
USB cable
CGM
USB converter
Fig. 9 Typical scheme of MIPEX-02 calibration
D.1.
Zeroing
D.1.1. Autozero.
Autozeroing is embedded in self-diagnostics algorithm of sensor. It starts after sensor is
powered up. Self-diagnostics is operating all along during the sensor is on. If anyway, zero shift is
observed, manual zeroing procedure is recommended.
1. Closing gas-sampling holes of the sensor impairs response time.
2. Do not zeroing under span gas concentration.
3. Recommended zero-gas is nitrogen or clean air (no impurities).
4. Always make manual zeroing after sticking (or removing) the dust filter on the
sensor.
5. To achieve correct data during the tests, be sure there are no:
excessive force on sensor housing,
100% humidity (dewpoint),
out of specified range of environmental pressure,
fast temperature change (more than 0.6
⁰
C/min), dust (if dust filter is not
used),
sensor rate no more than 1Hz.
