Mipex MIPEX-04, Руководство пользователя, Страница: 36 / 41

Optosense LLC USER MANUAL
Design department MIPEX-04 ULTRA-LOW POWER INFRARED GAS SENSOR
ESAT.100000.00.02 UM Revision 02 December 12th, 2016 Page 36 of 41
THE SOLE PROPERTY OF OPTOSENSE LLC. ANY REPRODUCTION WITHOUT THE WRITTEN PERMISSION OF OPTOSENSE LLC IS PROHIBITED.
Table 13. CGMs used for CH
4
span calibration
CGM number
according to
text
Components
composition
Content of
methane, %
vol. (% LEL)
Permissible
deviation
limits, % vol.
Limits of
permissible
error of
qualification,
% vol.
Number as
listed in the
State Register
or in the
Standard
designation
1 N
2
0
– –
ISO 2435-73
2 CH
4
, N
2
2.2 (50)
±0.25 ±0.04 ГОСТ 3883-87
3 CH
4
, N
2
4.15 (94)
±0.25 ±0.04 ГОСТ 3883-87
4 CH
4
, N
2
40
±2.5 ±0.4 ГОСТ 3892-87
Table 14. CGMs used for C
3
H
8
span calibration
CGM number
according to
text
Components
composition
Content of
propane, %
vol. (% LEL)
Permissible
deviation
limits, % vol.
Limits of
permissible
error of
qualification,
% vol.
Number as
listed in the
State Register
or in the
Standard
designation
1 N
2
0
– –
ISO 2435-73
2 C
3
H
8
, N
2
0.85 (50)
±0.05 ±0.015 ГОСТ 5328-90
3 C
3
H
8
, N
2
1.6 (94)
±0.1 ±0.05
EM 06.01.648
Appendix D.2. Temperature dependence of zero adjustment
It is allowed for user to adjust the temperature dependence of zero. Adjustment may be
performed for up to 10 values within operating temperature range. Any temperature range is split
in
to equal intervals about 12.5 °C each (300 ADC counts). Each interval is used for corresponding
operating temperature.
An example of procedure for temperature range of -
40…+60 °C:
1. Fill sensor atmosphere with nitrogen.
2. Power on sensor.
3. 1 minute after, send <ZERO0> command. This command erases previously defined
temperature coefficients.
4. Change sensor ambient temperature in range of -
40…+60 °C with a pitch of 12.5 °C. For
each of 9 points of temperature range, lock the temperature for at least 20 minutes.
5. When temperature is stable, for each of 9 points of temperature range send <ZERO>
command by which current temperature ADC value and ratio S
t
value (see Table 15) are
written to sensor memory (see Fig. 13).