Commissioning
4.3 Commissioning and operation
OXYMAT 64
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Operating Instructions, 06/2008, A5E00880383-03
4.2.2
Adjusting the sample gas flow
High-pressure version
The sample gas must be connected to the sample gas inlet. Make sure that the input
pressure for the analyzer version without internal pressure regulator is approx. 2000 hPa.
With a built-in pressure regulator, the pressure must be between 3000 hPa and 6000 hPa.
The total flow is factory-set to 24 l/h. It is specifically recommended that this is not changed.
However, if a change is necessary, the total flow can be varied from 15 l/h to 30 l/h using the
internal pressure regulator. The total flow can be measured using a flowmeter at the sample
outlet. Following a change in the total flow, it is essential to check the sample gas flow
through the sensor and to readjust this if necessary.
The sample gas flow can be read on the flowmeter at the front. It must be 7.5 l/h. If different,
set the desired flow by adjusting the bypass capillary inside the analyzer. A leak test should
subsequently be carried out to check for leaks in the supply line.
Low-pressure version
The sample gas flow must be set externally to 125 ml/min (7.5 l/h). The flow can be read on
the flowmeter at the front. Depending on the application, it may be meaningful to install a
bypass upstream of the gas inlet in order to keep the 90% time as short as possible.
See also
4.3
Commissioning and operation
4.3.1
General information
After a short period, the measured value display appears on the LC display. The status
display is present above this in the top line. A footer is present at the bottom. The current
operating state is displayed in the footer.
Switch on the power supply
For the first approx. 30 minutes, the O
2
sensor is in the warmup phase. During this period,
the message 'WARMUP' is displayed in the bottom line.
Achievement of the full measuring accuracy of the device depends on the ambient
temperature. At room temperature, this is approx. 3 hours following switching on.