Mipex MIPEX-02 1 Series, Руководство пользователя

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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. 35 of 38
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D.1.2. Manual zeroing in whole temperature range.
1. Fill up the sensor with zero-gas.
2. Send DATAE and check, that status byte in response is 0.
3. Send ZERO2 command in ASCII and check, that response is ZERO2 OK.
D.1.3. Manual zeroing in different points of temperature range.
If zero shift appears in different temperature, use ZERO command with following
recommendations.
Procedure is similar to manual zeroing in whole temperature range and consists ZERO
command sending in various static temperatures, i.e. after status byte in response of DATAE is 0.
There are three ways to make this procedure:
One point zeroing. Send ZERO command in any static temperature. That is recommended to
take a temperature point close to 23 ⁰
С.
Three points zeroing. Taking one point at 23 ⁰ C and two others close to edges of operating
temperature range is recommended.
Multipoint zeroing. That is recommend to take one point at 23 ⁰ C, two points at the edges of
operating temperature range and some other intermediate points. Similar, 10-13
⁰
С - fold interval
should be taken between each points.
Because of MIPEX-02-X-II-X.1 X temperature range could be divided on 8 interval, most time
taking, but most precise procedure is 9-point zeroing.
Fig. 10. Scheme of manual zeroing with ZERO command.
If the requirements to the sensor error are not fulfilled in accordance with Table 5, the
procedure of setting zero and calibration shall be repeated. In case of a repeated non-compliance
of the sensor readings to the value of concentration of
СGM No.3, the sensor is subject to
replacement and dispatching to the Manufacturer.
D.2. Scaling
Scaling procedure should be used for following purpose:

Quick switch between readings in % vol. or % LEL.

Set up cross-coefficients for measuring other hydracarbons gases, than calibrated
one. Cross-coefficients can be requested as additional option by ordering. Please
note, that accuracy in this case is lower than specified.

There are two scale coefficients for CH4-sensors. First is for 0-5%Vol. range. Second
is for 5-100%Vol. range.