OPERATING INSTRUCTIONS
1. TURN ON:
Press the ON/OFF button once to turn on and again to turn off.
NOTE: Hold button down for approximately 1 second to turn unit off.
2. WARM UP:
The detector automatically starts heating the sensor. During the
heating cycle, the digital leak size indicator will flash 0 and the detector will sound
a slow “beep”. Warm up time is usually less than 20 seconds.
3. READY:
The detector is ready to begin searching for leaks when the flashing
0 stops and the green sensitivity LED turns on. The audio “beep” increases in
frequency and the probe LED begins to blink steadily.
4. SEARCHING:
When searching for leaks, move the sensor tip along A/C lines
and fittings no further away than 0.4 in. (9.5 mm) and no faster than 3 in./sec.
(75 mm/sec.) If the detector alarms, make smaller sweeps back and forth until the
leak source can be pin pointed. NOTE: The LD920 only responds to changes in leak
concentration. The alarm will re-set automatically if the sensor tip is held at the leak
source. If the leak detector has been out of use for an extended period, weeks or
months, the following action is recommended. Power on the instrument and allow it
to come out of warm up. Then run it with the sensitivity level in the Hi (high) position
for several minutes before testing it with the Leak Test Vial. This action will guarantee
that the sensor is fully conditioned for maximum response to tracer gas.
Digital Leak Size Indicator
Low Battery Indicator
Sensitivity Level Indicators
Audio Mute & Sensitivity Level Selectors
Power On/Off
LD920 CONTROL PANEL
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