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Gas Pup

20 Instruction 55-9002

Operation

Water/Filter Trap

The optional water/filter trap accessory is recommended to be used in

conjunction with the 30" barholing probe; thus preventing water from

being drawn into the instrument when the probe is inserted into a hole

filled with water. The water trap can also be used with the standard 10"

probe when an operator is probing for a gas leak in an area that contains

pools of water.

Install the water/fiter trap directly on the instrument’s gas inlet fitting;

then connect the gas probe and hose assembly to the water trap as shown

in Figure 17.

When using the water trap, observe that its bowl will begin to fill as

water is drawn into the probe. It is good practice not to allow the water

level to rise above the filter retainer. Empty the bowl by first turning

OFF the Pup or removing the water/filter trap from the instrument, and

then pushing up on the drain valve located at the bottom of the bowl.

The water trap also contains a particulate filter that should be changed

when it becomes contaminated with dirt. Note that a dirty filter will slow

down the flow of gas into the instrument and thus slow down the

instrument’s response time. Replace this filter by first unscrewing the

bowl, and then unscrewing the filter retainer and discarding the old filter.

Install a new filter and reattach the bowl.

Figure 17. Water/Filter Trap

Attach Water/Filter Trap

to the Instrument’s

Gas Inlet Fitting

BOWL

(It is good practice not to

allow the water level to rise

above the Filter Retainer,

otherwise gas flow may

become restricted.)

PARTICULATE FILTER

(P/N 07-1644)

FILTER RETAINER

DRAIN

(Do not drain bowl with Pup

turned ON, otherwise water may

be drawn up into the instrument.)

Gas Probe & Hose Connector

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