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(continued on page 15)
To assist pinpointing the location of underground leaks the Bar
Hole Test feature may be used. This feature will draw a timed
sample (45 seconds) and display sustained and peak readings.
NOTE: Use an approved barhole probe with filter to pre-
vent damage to the instrument when conducting bar hole
surveys.
To Conduct a BAR HOLE Test:
Prior to the test, attach the approved bar hole probe to an oper-
ating instrument. Block the inlets of the probe to test for any air
leakage. The instrument will show FLOW BLOCKED in approxi-
mately 10 seconds if all seals are good. If flow block is not
detected, check the integrity of the “O” ring seals and connec-
tions on the probe and instrument. If flow block can not be
achieved, contact the factory for assistance. An air tight system
is crucial for accurate readings.
From the working display, press & release the BH TEST/MENU
BUTTON (B). SELECT TEST will appear on the top line of the
display. Press & release BH TEST/MENU BUTTON (B) to enter
the BH menu. Insert the bar hole probe into the location for the
survey. Press and release BH TEST/MENU BUTTON (B) once
more to start the test.
A 45 second countdown for the test will begin. The current per-
cent of gas by volume detected will be displayed on the left.
BAR HOLE TEST
BAR HOLE TEST
continued from page14
The peak percent of gas by volume detected will be displayed
on the right. At the conclusion of the test, the pump will shut off
and any sustained and peak readings will be shown and re-
corded.
If you have another test to take, press & hold the SAVE/ZERO
BUTTON (C). This will restart the pump and clear the last read-
ings. When the readings have returned to zero, release SAVE/
ZERO BUTTON (C). The countdown timer will restart.
You may encounter NSR readings during the bar hole test (see
page 12 for definition). Changing the GAS TYPE, a selection in
the USER MENU may help to identify a questionable vapor. A
hydrocarbon filter kit is available to help screen if contact with
heavy hydrocarbons is suspected. Please consult the factory
for details.
If you wish to cancel during a test or return to the working dis-
play, press & release the POWER/MUTE BUTTON (A).
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