Repair, maintenance and servicing
6.2 Sensor module
OXYMAT 64
Operating Instructions, 06/2008, A5E00880383-03
105
Leak test
Following all maintenance or servicing measures which affect the gas path of the sensor
module, a leak test must be carried out according to Section "Commissioning and operation".
If the leak check indicates the presence of a leak, check all screwed glands and hose
connections.
Sample gas flow
Subsequently check that the sample gas flow is correct; it must be 125 ml/min (7.5 l/h). To
do this, connect an inert gas which has a density similar to N
2
(e.g. oil-free compressed air)
to the sample gas inlet. Then set a relative pressure of approx. 2000 hPa at the sample gas
inlet (for the high-pressure version without internal pressure regulator). If a pressure
regulator is fitted, a relative pressure of 3000 - 6000 hPa can be connected.
If the displayed flow deviates from the setpoint of 7.5 l/min, set the setpoint by adjusting the
bypass capillary.
With the low-pressure version, the flow must be set externally to 125 ml/min (7.5 l/h).
Calibration
Following replacement or readjustment of the sensor module, the analyzer must be
recalibrated according to Section "Calibration".
See also
Leak test (Page 39)
General information on calibration (Page 40)
Calibration examples (Page 41)