FLOWSIC100 Operating Instructions
Gas Velocity Monitor
Maintenance
128 © SICK MAIHAK GmbH · Germany · All rights reserved 8012513/03-2008
5.4 Maintaining the Cooling Air Supply for Device Type PR-AC
Pump exchange see Ser-
vice Manual
The cooling air is taken in through a membran integrated in the electronics unit and is lead
through a filter. The life cycle of this filter and of the pump is approximately 2 years. If the
device is used in contaminated ambient air, the life cycle may be shorter.
Checking the Operation of Filter and Pump
Within the scope of maintenance activities, the operation of the filter must be checked on
a regular basis.
‡ For an easy check, hold a hand to the cooling-air intake-gland: if the filter is properly
operating, a negative pressure (suction effect) is perceptable.
Replacing Pump or Air Filter
Fig. 5.2: Electronics housing FLSE100-PRAC without cover (hoses are not displayed)
Spare part:
Membran pump 24 V DC
Part No.: 6033117
Air filter complete
Part No, 5314720
‡ Open the cover of the electronics unit.
‡ Unplug the hoses from the connectors at the air filter and at the membran pump.
‡ Remove the air filter and replace it with a new one if necessary.
‡ To exchange the pump, carefully dismount the carrier plate with pump and electronics.
‡ Dismount the pump from the carrier plate.
‡ Mount the new pump on the carrier plate.
‡ Reassemble the sender/receiver unit in reversed order.
Membrane pump
Air filter
Electronics block
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