MasterCool Intella Sense 55900 Instrucciones De Operación página 4

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 until 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
Remove the battery cover as shown in Figure 1 and remove the existing batteries. It may be
beneficial to turn the unit vertically and shake out both batteries. Install two C size alkaline
batteries with the polarities shown in Figure 1. Re-install the battery cover and secure with the
cover screw.
Replacing the Sensor
To replace the sensor, firmly grasp the flexible probe near the end with one hand and use the
other hand to unscrew the nozzle portion from the threaded probe tip in a counter-clockwise di-
rection. Next, remove the metal washer, the rubber washer and the sensor in that order. Observe
the orientation of the key on the sensor being removed. It would be advisable to replace the filter
inside the nozzle at the same time. To remove the micro-filtration membrane from inside the
nozzle, the assistance of a long thin object such as an o-ring pick or equivalent will be required.
When installing a new sensor, orient the tab key on the sensor with the keys slot on the probe,
4
Probe
www.mastercool.com
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Rubber Metal
Key Sensor Washer Washer Filter
Cover
Screw for
removing
or securing
the battery
cover
+
Nozzle
Figure 1
Figure 2