Operating Tips; Leak Detection Techniques - ATP ZX-1A Heated Pentode Manuel De L'utilisateur

5. Begin searching for leaks. Move the probe tip toward the suspected leak. The flexible probe
may be shaped to provide access to hard to reach areas.
NOTE: If the unit has previously been in service, check that the probe tip is not obstructed with
dirt, grease, etc. and check the condition of the filter as described in the Maintenance section on
page 15.
6. If a refrigerant is detected, the unit will begin to alarm – the audible tone will quicken and the
LEDs will light. The larger the detected concentration, the greater the alarm. The LEDs pro-
vide a proportional indication of concentration
• Green – small concentration
• Orange – moderate concentration
• Red – large concentration
NOTE: The unit is NOT a measuring tool, rather it is simply a proportional detector. That is to
say that the LEDs are not, and cannot be construed to be, indicative of a specific corresponding
leak rate or concentration.
7. If an alarm occurs before the leak source is pinpointed, the
"home-in" on the leak, as described in the "Operating Features" section, above. The unit may
be 'reset' as many times as necessary to pinpoint the leak source.
NOTE: Due to the high sensitivity of the instrument it is possible it will detect the presence of
high intensity electromagnetic fields.
The following section includes several general operating tips, and the SAE J1628 recommended
procedure for leak detection.

LEAK DETECTION TECHNIQUES

1. Prior to each use, inspect the probe tip and filter element as described in the Maintenance
Section on page 15.
2. Be aware that refrigerants are invariably heavier than air and will tend to 'fall' from, or collect
below, actual leak points/sources. Searching below areas of potential leaks is invariably the
most effective and reliable way of locating such.
3. In areas that are heavily contaminated with refrigerant, the unit may be reset to block out
ambient concentrations of gas. The probe should not be moved while the unit is being reset.
The unit can be reset as many times as needed.

OPERATING TIPS

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