mru SWG 100 biogas, User Manual

Page: 137 / 141

MRU GmbH SWG 100 User Manual
Page 137 of 141
1. Installation of the calibration gas cylinder (gas cylinder for the undilute
calibration).
2. Adjustment of the undilute electrochemical sensor.
a.
Open the path: E
XTRAS
/ A
DJUSTMENT MENU
/ A
DJUSTMENT GAS FACTOR
b. Select the electrochemical sensor, which should be adjusted.
c. Impinge the device with the calibration gas. Wait until the gas
concentration, of the sensor will not change anymore.
d. The actual value is displayed at the screen. This actual value must
be adjusted with the set point, from the gas cylinder. To do this,
changes with the right/left arrow keys the gas factor until the actual
value is adjusted with the set point.
3. Adjustment of the dilution-unit.
a. Installation of the calibration gas cylinder, for the dilution-unit. This
gas cylinder must have a min. concentration of 500 ppm of the
target gas.
b. Open the path: E
XTRAS
/A
DJUSTMENT MENU
/ G
AS DILUTION ADJUSTMENT
.
c. The follow screen appears. The menu has the follow structure:
i. Dilution factor (1): Means the dilution ratio. For example:
the value 50 means a ratio from 1:50. Hence, 10,000 ppm
pure H2S, for example, will dilute to 200 ppm. The
mathematical basic formula is:
C
pure
=C
Dilution
*f
Dilution
Cpure= Undilution gas concentration [in ppm].
CDilution=Dilute gas concentration [in ppm].
fDilution=Dilution factor [do dimension].
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