biosystems PhD Lite User Manual

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If the leak is located in the sample probe and tubing
assembly, inspect it and look for the leak. See section
6.3 for instructions on the replacement of key probe
parts.
If the leak is located in the pump itself, the pump may be
disassembled. See section 6.2.2 for instructions on how
to open the pump assembly.
6.2.1.3 Low flow pump failure
If the instrument detects a pump fault during normal
operation, it will automatically indicate that a pump fault
exists on the display and the audible and visible alarms
will be activated.
Pump Fault
The instrument will then instruct the user to remove the
blockage.
Pump Low Flow
Remove Blockage
Pump Low Flow
MODE=Acknowledge
In most cases, the cause of the blockage is easily
recognized. Remove the blockage, reattach the hose
and probe assembly and press the MODE button to
reset the pump. Once the pump starts up, retest the
pump seals by placing a finger over the end of the
sample probe.
6.2.2 Internal pump filter replacement
The following procedure describes how to replace the
internal pump filter:
Figure 6.2.2 Internal PhD Lite pump diagram
1. Remove the four bottom screws from the pump
assembly and disassemble the upper and lower
sections of the pump case.
2. Remove the two pieces of tubing from the filter cap
by gently twisting and pulling until the ends are free.
3. Remove the filter cap and replace the used 61-001
filter.
4. Reattach the filter cap and tubing. Make sure the
tubing is secure to the filter cap before
reassembling the upper and lower pump cases.
5. Reassemble the upper and lower sections of the
pump case. Do not over-tighten the four screws!
Note: Proper operation must be verified before the
pump is put back into service. See section 6.2.1.1
above.
6.2.3 Specific problems with motorized pump
6.2.3.1 Pump will not turn on
Possible causes:
Pump is not properly attached to the instrument.
Instrument is not turned on. Instrument battery too low
for pump operation.
Solution(s):
Make sure pump is properly attached to instrument,
recharge or replace instrument batteries.

biosystems PhD Lite Specifications

General

Brand	biosystems
Model	PhD Lite
Category	Security Sensors
Language	English