Teledyne 320 Series - Portable oxygen detectors User Manual

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2-5

Teledyne Analytical Instruments

Operation and Maintenance

Portable Oxygen Detectors

2.9

Storing the Instrument

When the instrument is not in use, keep oxygen from the cell by removing
the flow-through adapter and installing the cell saver.

Place the range switch in the OFF position to conserve the batteries. Do
not charge the batteries continuously during storage.

2.10

Filter Maintenance

A small in-line filter has been provided on the sample inlet to protect the
pump. This filter is located on the outside of the analyzer on the rear of the
unit. The filter media is polyester wool. If the filter becomes clogged with
dirt or saturated with moisture, the filter media must be changed. To
change filter media:

1. Grasp end of filter tube (which is also sample inlet port) and pull out

while using a slight up and down rocking motion.

2. Remove old filter media with a bent pair of tweezers or a small stiff

wire with a hook bent in the end.

3. Replace with new polyester wool (aquarium filter material). If this

is not available, use cotton and be sure not to pack too tightly. (It
will cause excessive restriction.)