D440A
1. TURN ON:
Press the ON/OFF button once to turn on and again to turn off.
2. WARM UP:
During the heating cycle, the digital leak size indicator will flash 0 and
the detector will sound a slow "beep". Warm up 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 probe LED begins to blink steadily.
The digital leak size indicator remains off normally but once a leak is
detected, a number from 1-9 will be displayed for all HFC and HCFC
refrigerants regardless of the sensitivity setting.
The number will continue to increase or decrease depending on the
amount of refrigerant sensed. The maximum value will be displayed
once the leak source has been located. The table below can be used to
approximate the size of leak:
Maximum # displayed
D440A / D440A-C Control Panel
Digital Leak Size
A
Low Battery
Sensitivity Level
Operating Instructions
The detector automatically starts heating the sensor.
Leak Size Indicator
1 -3
4-6
7-9
Indicator
Indicator
Indicators
Audio Mute &
Sensitivity Level
Selectors
Power
On/Off
Leak Size (oz/yr)
2
0.1 to 0.5
2
< 0.1
>0.5