22
Maintenance and Troubleshooting Guidelines
US
SM5000 Sampling Module - DC Pump Model
4 Maintenance and Troubleshooting Guidelines
4.1 Maintenance
The Pump Sampling Module requires minimal maintenance. However, the filters need routine inspection
and possible replacement. It is good practice to have on hand replacement filters to minimize any down time
of your unit (see Tab. 6).
4.2 Filter Maintenance
Filter maintenance consists of visual inspection of the two filters, end-of-line filter and in-line filter. When
new, filters are white or slightly yellowed; when loaded with dust or dirt, they normally turn dark in color. Visu-
ally inspect the two filters periodically. The frequency of this inspection depends on the environment; if your
environment is extremely dirty or dusty, this inspection should be done often.The in-line filter is hydrophobic
and will not pass liquids.
End-of-line filters must be located so that they are not exposed to liquids or steam. If liquids become
entrapped within a filter, replace the filter as it will interfere with proper operation of the unit.
4.3 Troubleshooting Guidelines
Tab. 5 Troubleshooting guidelines
Symptom Possible cause Probable solution
Low flow indicator is ON Sample line clogged Check and replace or clean sample line
A leak internal to the Pump Sampling
Module
Check tubing inside the Pump Sampling
Module, especially the fittings
Inoperative flow switch Replace flow switch
The sample line is under a vacuum Remove vacuum from sample line inlet
Dirty end-of-line or in-line filter Replace dirty end-of-line or in-line filter
Exhaust clogged Clean or replace exhaust tubing
No sensor output or low
output
Sensor is approaching its end-of-life Replace sensor
The ambient is too cold or too hot for
the sensor
Place Pump Sampling Module in a
warmer or cooler ambient environment
A leak in the sample line
Check/repair any leaks in the sample
line
Inoperative sensor pre-amp electronics Replace sensor printed circuit board
Exhaust clogged or restricted
Unclog or remove the restriction on the
exhaust
Dirty or wet sample filter Replace sample filter
Inoperative flow switch Replace flow switch
Sensor wiring plug loose Reconnect sensor wiring plug
Bad wiring connection between instru-
ment and Pump Sampling Module
Check wiring and replace or repair any
inoperative wiring or connections
No power to the unit Turn control instrument ON
Improper voltage selection at the
control instrument
Select proper voltage at the control
instrument
Inoperative relay Replace printed circuit board assembly
To Next Page
Loading...
Need help?
General
