Teledyne 4700 Pocket Manual page 124

4700 Refrigerated Sampler
7. Align the blue collars with the alignment
notches.
8. Close the liquid detector cover and secure it
tightly with the large knob.
9. Close the pump housing band and secure it
with the latch.
10. Reset the pump-tube counter. (Follow the
steps in section 3.3.9 and select YES when
asked "RESET PUMP COUNTER?".)
11. Take a "dry" grab sample (section 4.4) to
test the new tube.
12. Reconnect the suction line.
Pump Tube Life – Several factors shorten
the pump tube life. Among them are:
• Incorrect installation.
• Abrasive materials suspended in sample
liquid.
• Frequent line rinses.
• Long purge cycles, such as those used
with long suction lines.
To extend the life of the pump tubes:
• Always use Isco pump tubes.
• Install the tube properly, aligning the
blue collars correctly in the notches.
• Follow the natural curve of the tube
when wrapping the tube around the
pump rollers.
5-6