Instruction manual

14 (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 TICK/MENU BUT-
TON (B). SELECT TEST will appear on the top line of the
BAR HOLE TEST (For percent volume equipped units only)
OPERATION AND USE continue from page 13
calibrated for propane, “NSR” likely indicates gas lighter than air
such as helium . “NSC” may indicate methane, hydrogen or
natural gas.
16. When being used in dark areas an automatic backlight will
illuminate the display.
17. To turn instrument off, press/hold the POWER/MUTE BUT-
TON (A) until the beeping sound stops and POWER OFF ap-
pears on the display. Release the button and shut down will
occur.
BAR HOLE TEST continued from page 14
display. Press & release TICK/MENU BUTTON (B) to enter the
BH menu. Insert the bar hole probe into the location for the
survey. Press and release TICK/MENU BUTTON (B) once more
to start the test. A 45 second countdown for the test will begin.
The current percent of gas by volume detected will be displayed
on the left.
The peak percent of gas by volume detected will be
displayed on the bottom. At the conclusion of the test, the pump
will shut off and any sustained and peak readings will be shown
and recorded.
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 dur-
ing a test or return to the working display, press & release the
POWER/MUTE BUTTON (A).
15
CALIBRATION CHECK
To verify the accuracy of any Sensit®Gold G2, it must be ex-
posed to a known concentration of test gas that will test any
sensor combination included in your particular model.
Any sensor that does not meet the specifications listed in this
manual may require calibration or repair. A calibration check
(continued on page 16)