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3. The larger the PPM value indicates, the greater the leakage concentration, and the
faster the buzzer will sound;
4. Through the leakage curve under the numerical value, the area with the highest
leakage concentration can be determined, and the leakage point can be further found;
Introduction to Qualitative Mode Operation
1. In the quantitative mode, short press the MODE button to enter the qualitative detec-
tion mode;
2. Press button to adjust to your preferred sensitivity level (default level is High).
3. Move the probe slowly (about 3ft/s or 75mm/s) at these suspicious places, moving back
and forth but no more than 0.25 "/6Em away from the leak areas.
Note: A closer probe position and slower "sweeping" movement usually improve the possibility of nding
a leak.
4. The buzzer and LCD display will indicate the detected leak at the same time：
Buzzer:The sound will increase in proportion to the leak intensity.
The faster the buzzer beeps, the higher the leak has been detected.
LCD display:The bar graph will increase from bottom to top in proportion to leak intensity.
The higher the bar graph rises, the higher the leak has been detected.
5. After the leak point is found, move the probe away for a few seconds and re-check the
leak point to con rm the leak point;
Note: In this mode, the relative concentration of the gas is detected. If the instrument
remains stationary and the concentration does not change, the leakage will not be
detected. You can move the probe to an area with a lower leakage concentration for a few
seconds to reset the zero point automatically.
See the illustration below for visualized detection method:
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