KPDM-1
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6 MAINTENANCE AND REPAIR
6.1 If during the device operating a sign of battery discharge in the lower left corner of a
display is constantly indicated it is necessary:
a) to change the battery, to do this loosen the screws on a back cover of the display and
control unit and remove the device cover (or remove the cover of a separate bay for battery), re-
move the old battery and insert a new one. Or
b) to charge the battery, to do this switch-off the unit, disconnect the primary converter from
the control unit, connect the battery charger to the control unit, connect the charger to a power
supply with the voltage 220 V and charge the battery for 12 - 14 hours.
6.2 A sign of close battery discharge is the discharge sign blinking when performing the
pressure differential measurements.
6.3 In the device operating process the pneumochannels and PPC sensor filters can be-
come clogged (dirt, water plug), a symptom of this event are chaotic values on the device display
when measuring obviously zero values of pressure differential. Channels can be cleaned in any
way (it is safer to do it by disconnecting the sensor from the primary converter). There is a capacity
hermetically closed by a screw gag in the lower part of the sensor applied for collection of garbage
and moisture penetrating into the central pneumochannel. It can be periodically opened and
cleaned in any way. Here an additional filter (5-10 mg of any wool) can be also placed.
If the liquid gets into the central channel it is necessary to remove it immediately or to per-
form further transportation of PPC "with the sensor down" not allowing the liquid to get to the sen-
sor base unit.
It is also necessary to keep (dry) PPC "with the sensor down" after speed measurement in
flows with lots of moisture vapour.
6.4 The device is equipped with the scheme of automatic power-off if within 15 minutes
there is not pushing of any button.
To return the device to the operating state it is necessary to switch-off and then to switch-on
a toggle switch "on".
6.5 In the event of failure the device (or its unit) should be repaired by the manufacturer.
7 STORAGE RULES
7.1 Conditions of the device storage by group 3 according to GOST 15150 in packing in
closed premises with natural ventilation without artificially regulating climatic conditions where fluc-
tuations of temperature and humidity are considerably less than in the open air.
