2
3
mute.
• HML (HIGH/MEDIUM/LOW SENSITIVITY): The HML key selects the sensitivity range of the unit.
The color of the LED and the tone of the “beep” change for each sensitivity selected.
(High=Red, Medium=Orange, Low=Green)
DISPLAYING THE STATUS SETTINGS
• Depress the ON/OFF key, upon initial turn-on, the unit will momentarily display the status
conditions of the unit. This information will be displayed for approximately 3 seconds. One or
more LED’s will be ON during this brief time to display the following information:
1. If LED #6 is ON, the battery is reaching end-of life and should be replaced before the unit’s
operation is affected.
2. If LED #5 is ON, the unit is in the High Range setting which enables the
unit to detect gases that are difficult to detect.
3. If LED #4 is ON, the unit is in the Low Range setting which enables the
unit to detect easy to detect gases.
DISPLAYING THE WARM-UP STATUS
• All six (6) LEDS turn ON and sequentially become extinguished until only one GREEN LED
remains. At this point, the audible “beep” begins (unless the unit is muted), which is an
indication that the unit is ready for use. This process takes less than 1 minute.
• The unit always defaults to LOW sensitivity upon initial turn-on, as indicated by the GREEN LED.
CHANGING THE AUDIBLE LEVEL
• The Volume/Mute key enables the user to change the audible “beep” level in a sequential
manner. Successive depression alters the audible level from Normal, Low and Mute. Upon
each depression, the unit visually displays (for less than 1 second) the selected audible level
as follows:
1. In Normal, six LED’s are flashed briefly and the “beep” resumes at the maximum
audible level
2. In Low, three LED’s are flashed briefly and the “beep” resumes at a lower audible level
3. In Mute, only the READY LED stays ON and the audible is muted.
4. The selected audible level will remain stored in the unit unless changed.
CHANGING THE SENSITIVITY
• Depressing the HML key alters the sensitivity of the unit sequentially in the following manner:
1. When in High Sensitivity, the LED #1 (READY) changes to RED
2. When in Medium Sensitivity, LED #1 changes to YELLOW
3. When in Low Sensitivity, LED #1 changes to GREEN
4. During the detection of a leak, all the LED’S follow the color of the READY light.
CHANGING THE OPERATING RANGE FROM HR TO LR
• After the unit has warmed up and the READY indicator is ON, press and hold down the PEAK/
HR/LR key all LED’s are off. Release the key. The unit will perform a new warm-up sequence
with the new operating range.
REDUCING FALSE LEAK DETECTION
Under Adverse Conditions
To discriminate between false alarms and actual leak detection that may occur in the presence of
excessive air turbulence or accidental touching of the probe tip, the interference detector creates
a momentary interruption in the leak detector for several seconds, resulting in the following:
• When interference is detected, the audible beep stops and the INT/WT light LED #3 and the
READY LED #1 begin to flash briefly. When the unit is ready to resume operation, LED #3
extinguishes, the READY LED #1 turns ON and the audible resumes
In a Contaminated Environment
When a contaminated area is detected by the unit lasting for a duration of time during a leak
search, the sensor detects the change and will respond in the following manner:
• The READY indicator LED #1 will extinguish, the audible will stop (unless muted) and the INT/
WT indicator LED #3 will turn ON.
• The unit performs a re-calibration for the contaminated environment. When done, the CA
indicator LED #2 turns ON, the READY indicator LED #1 turns ON and the audible returns,
indicating that the unit is ready for use to detect leaks in a contaminated environment.
QUICK START TIPS ON HOW TO FIND LEAKS
A sudden whipping action of the probe or blowing into the sensor may cause the leak detector
to false alarm. Electronic sensors are incorporated into the product to detect such activity and
to reduce and minimize such false alarm. In the event such interference is detected, the LED #3
will begin to flash indicating interference then normal operation can resume after the READY LED
appears.
1. When starting the search for leaks, without a general knowledge of the magnitude of the leak,
set the instrument sensitivity to LOW. The LOW sensitivity will enable the unit to locate
medium as well as large size leaks.
2. Slowly move the probe approximately 3/8 inch (9 mm) above the area of suspected leaks.
Move the probe past the leak to allow the probe to clear if a leak is detected. Do not hold the
probe at the site of a leak. For verification, return the probe to the same area where a leak was
detected.
3. In the event no leaks were found with a LOW sensitivity setting, increase the sensitivity to
MEDIUM and repeat step (2) above.
4. For locating extremely small leaks; 0.1 oz/yr (2.8 grams) or less, the HIGH sensitivity scale
should be used. Due to the extremely small leak size, the tip of the probe should be moved as
close to the surface as possible (without physically touching any object). Physical touching
of an object will be detected by the probe sensors resulting in a brief interruption in the leak
detector. When probing for a leak in an contaminated environment, the sensor will detect the
contaminated area and will automatically adjust for the new conditions.
MAINTENANCE
To Install or Replace the Alkaline Batteries
