Rae MiniRAE Plus PGM-76, Руководство по эксплуатации и обслуживанию

Страница: 155 / 168

SECTION 8 MAINTENANCE
8 - 13
8.6 Pump Replacement
The sampling pump is rated for 4000-5000 hours of continuous
operation. It will consume higher amount of energy and reduce
its sample draw capability significantly when approaching the
end of the specified life time of the pump. As a guide, it is
recommended to replace the pump at six month intervals, if the
instrument is heavily utilized during the period.
1. Turn off power of the MiniRAE Plus Professional PID Unit.
2. Refer to Figure 8.1, unscrew the probe assembly, remove
four screws and open the Professional PID Unit.
3. Refer to Figure 8.1, and carefully remove two screws that
hold the pump to the top cover. Disconnect two Tygon
tubes connected to the pump. Note which tube goes to the
inlet barb and which goes to the outlet barb of the pump.
Disconnect the electrical wire from the pump to PCB.
Remove the pump.
4. Replace a new pump. Connect the electric wire. Connect
two Tygon tubes to the pump and tighten the pump to the
top cover with two screws. Make sure that the two Tygon
tubes are free of any "kink" and are not caught under the
sensor module.
5. Close the MiniRAE Plus Professional PID Unit covers and
replace screws.