5
NOW…
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
background 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 remains on 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 fast
auto recovery to re-establish sensitivity.
Returning to the leak site, the unit will
alarm again. The unit will reliably and
repeatedly pinpoint the leak with each
pass over the leak site.
If a large gross leak is present, the
auto zero circuit may reduce sensitivity
to an unacceptable 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 effective means to
determine if a gross leak of any refrig-
erant exists prior to searching for leaks
(see Section Setting the Sensitivity).
Manual Mode
In the Manual Mode the auto zero
function is disabled, causing the unit
not to zero out the leak if the probe is
