Solinst 464 Mk3, Руководство пользователя

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Model 464 Electronic Pump Control Unit User Guide
Page 14
5.0 Maintenance
Moisture in the Model 464 Electronic Pump Control Unit can shorten the
lifetime of some of its components. After each sampling session, compressed air
or nitrogen should be sent through the Pump Control Unit to ensure that any
build-up of moisture is purged and pushed out of the Pump Control Unit, as well
as through the Supply and Drive Lines.
Connect the compressed air/nitrogen gas source and let it cycle through the
Pump Control Unit with the drive line disconnected at the pneumatic pump. Set
a 10 second "Drive Time" and 2 second "Vent Time". This will create a pulse of
air to purge the system components. Maintain this purging cycle for 10 minutes.
If you are using the 464 External Filter, use the draining valve as necessary to
prevent water from entering the 464 Electronic Pump Control Unit.
Of note, sources of moisture may include:
1. The air compressor − follow the manufacture's suggestions for routine
maintenance for draining the air tank from a build-up of moisture.
2. Sample backflow − best practice is to maintain the Control Unit at a higher
elevation than the Drive Line connection at the wellhead. This height
difference reduces the potential for backflow into the Control Unit.
3. Precipitation − avoid direct exposure to precipitation or water splashing;
− ensure that your Control Unit is stored dry, inside and out.
4. Pump damage − leaks in tubing, a ruptured bladder, or damaged o-rings
can cause backflow. Regularly monitor pump condition and replace parts as
required.
NOTE
If moisture is observed exiting the
diffuser on the Drive Line exhaust
fitting when the pump is venting,
remove the pump from the well
and check for damage (o-rings,
bladder, lines).