Bacharach H-10PM Manual - Auto Mode
6
YOU’RE READY TO FIND THE LEAK !
(You have a choice of two modes)
Auto Mode
This mode is preferred because the unit
effectively auto zeros to block out back-
ground levels of refrigerants and changes
in background contamination. This greatly
reduces and/or eliminates false alarms
while retaining sensitivity to quickly locate
small or medium size leaks. Pinpointing
leaks in this mode requires continuous
probe movement. (We recommend 2 inches
per second as specified in SAE J1627
and J1628). If the probe is held station-
ary over the leak the unit will zero out the
leak, going into the idle 2-3 ticks/second
condition. Briefly moving the probe away
from the leak, for 1-2 seconds, permits the
unit to re-establish sensitivity. Returning
to the leak site, the unit will alarm again.
Continuing this procedure will reliably and
repeatedly pinpoint the leak with each pass
over the leak site.
If a large leak is present, the auto zero cir-
cuit may reduce sensitivity to an unaccept-
able level to find small and medium sized
leaks. If this condition exists, the manual
mode will enable you to pinpoint the large
leak. The manual mode is also an effec-
tive means to determine if a large leak of
any refrigerant exists prior to searching for
leaks (see “Adjusting the Sensitivity”).
WARNING: Personal Injury Hazard
Do not use the H-10PM in an explosive or com-
bustible atmosphere. The ambient atmosphere is
drawn through the probe and through the sensor,
which operates at approximately 1472°F (800°C).
The resulting hot mixture of air and combustible
gas could explode.