4000 4-/5-Gas Measuring Instruments Unit
Service Manual 5-13
N.B. Large amounts of deposits tend to be washed away when you first start
cleaning. Do not therefore feed the cleaning fluid back into the circuit to
start with. The length of time depends on the level of soiling; guideline
~30 s).
• Switch the instrument on and activate the pump.
• The cleaning process itself should take about half an hour
• When cleaning is completed, rinse the system in the same way with cold water.
• Remove the cleaning hose from the check valve and let the pump run on for ~30 s.
• Switch the pump off.
• Remove the cleaning hose and the probe hose.
• Clean the probe hose and probe with clean, oil-free compressed air.
Caution: the probe hose must not be connected to the exhaust gas tester!
• Replace the condensate filter on the rear panel of the instrument.
• Connect the hose between the condensate filter and check valve.
• Replace the filter in the probe hose.
• After cleaning, carry out a leak check.
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