CPS LEAK-SEEKER LS780C Mode D'emploi page 3

ADDITIONAL PARTS INCLUDED
• Spare Ion-Pump
• Carrying case
• Earphone for noisy environments
• 4 AA Alkaline Batteries
INSTRUMENT CONTROLS
The instrument features an easy to use
3-position slide switch as its only control
feature. The function of each of the posi-
tions is as follows:
OFF: In this position, the power to the cir-
cuit is disconnected.
LO: This is the position that puts the
LS780C into it's low sensitivity mode. When
switching from OFF to LO, the instrument
wakes up, takes note of the contamination
conditions around the sensor, setting itself
to those conditions and notifies the user
that it is ready to function by sounding a
low pitched tone at regular intervals. This
tone increases in pitch and frequency as
the leak is approached.
HI: This is the position that puts the LS780C in its high sen-
sitivity mode. When switching from OFF to HI, the instrument
wakes up, takes note of the contamination conditions around
the sensor, setting itself to those conditions and notifies the
user that it is ready to function by sounding a low pitch tone
at regular intervals. This tone increases in pitch and frequency
as the leak is approached.
Note: It is not necessary to go from LO or HI to the OFF
position to clear the instrument.
AUTOMOTIVE APPLICATIONS
SAE J1628 RECOMMENDED PROCEDURE
NOTE: On automotive A/C systems, test with the engine off.
1. The air conditioning or refrigeration system should be
charged with sufficient refrigerant to have a gauge pres-
sure of at least 340 kPa / 50psi when not in operation. At
temperatures below 15˚C / 59˚F, leaks may not be measur-
able, since this pressure may not be reached.
2. Take care not to contaminate the detector probe tip if the
part being tested is contaminated. If the part is particularly
dirty, or condensate (moisture) is present it should be
Sensor
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3
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OFF
LO
HI