Powering Up; Zeroing The Unit; Prior To Operation - RESTEK 22655 Manuel D'utilisation

3.0 Powering Up

Figure 1:
Leak detector schematic.
Depress and hold the power button (Figure 1) until the unit responds
with the wake-up mode. The leak detector will run through a self-
calibration sequence for approximately 15 seconds. During this time
DO NOT attempt to zero the unit.

4.0 Zeroing the Unit

After the LED lights stop flashing, the unit is ready for use. The instrument
may need to be zeroed periodically between uses, especially if it is moved
from room to room or between areas of differing temperature or humidity.
Do not attempt to zero the unit while the probe is stored in the holder. The
probe MUST be removed from the probe docking station before zeroing the
unit. To re-zero, press the zero set button. The unit will run a self-calibration
sequence for approximately 4 seconds. When all LED lights stop flashing
and the blue LED light is lit, the unit is ready for use.
NOTE: To avoid false readings, do not attempt to use or zero the unit while the self-calibration sequence is in progress.

5.0 Prior to Operation

Verify the operation of the leak detector before each use by sampling gas from a GC split vent or other source of hydrogen or helium. Also,
visually inspect the probe tip, reference gas inlet, and exhaust port for obstructions (Figure 1).
IMPORTANT: Fittings being checked must be clean and dry; liquid leak-detecting agents, dust, and other debris may damage the leak detector if
drawn into the probe.
The leak detector responds to almost any gas you can smell and many gases that you can't smell. Solvent vapors, split vent exhaust, or even
strong air currents around the probe or reference inlet can cause instability or false positive readings. Be careful not to breathe into the refer-
ence inlet when checking for leaks or to cover/block the inlet with your hand.
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