4
5
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.
- +
Cover
Screw for
removing
or securing
the battery
cover
Figure 1
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 microfiltration membrane from inside the
nozzle, the assistance of a long thin object such as an o-ring pick or equivalent will be required.
Probe
Key Sensor
Rubber
Washer
Metal
Washer Filter
Nozzle
Figure 2
When installing a new sensor, orient the tab key on the sensor with the keys slot on the probe,
making certain that the 3 pins of the sensor are inserted into the appropriate pins inside the
probe end. Verify that the sensor has been properly inserted into the probe. Next install the
rubber washer as shown in Figure 2, followed by the metal washer. Insert new filter and screw
on the nozzle while firmly holding the probe end with the other hand. DO NOT USE ANY TOOLS in
tightening the tip assembly, firmly hand tighten only.
LEAK TEST VIAL
A Leak Test Vial is supplied with your leak detector to verify that the
leak detector is operating correctly.
1. Turn the leak detector ON and wait until the unit completes its
warm-up sequence. The READY LED will be displayed and the
audible “beep” will begin, unless muted. Set the sensitivity level
to MEDIUM.
2. Remove the vinyl cap from the vial to expose the small leak hole as
shown in Figure 3A below. DO NOT UNTWIST THE BLACK CAP
Figure 3A
Figure 3B
FROM THE BOTTLE.
3. Briefly place the probe tip close to the small hole, as shown in Figure 3B until an audible
alarm is generated. This will be an indication that the unit is operating properly. Reseal the
vial with the previously removed vinyl cap and return to the case.
PRECAUTION!
If the test vial is held in close proximity of the probe tip for an extended period of time, the
probe sensor can saturate. The leak detector will interpret this as a contaminated atmosphere
associated with a large leak.
This precaution also applies when locating leaks. Refer to
Quick Start Tips On How To Find
Leaks
, step #2 for further clarification.
If the above precaution is not followed, the CA (contaminated atmosphere) LED may appear on
the display, after a self-calibration process. The unit can be used to detect leaks provided the
READY LED appears on the display. The CA LED indication will eventually disappear when the unit
returns to a non-contaminated environment and undergoes a self-calibration process.
REPLACEMENT PARTS
Replacement parts and accessories for the 55975 Leak Detector are available through the same
dealer from whom you purchased the instrument.
REF. #
DESCRIPTION
MC PART #
1.
Blow Molded Plastic Box
55800-PB
2.
Leak Test Vial
55800-VL
3.
Battery Cover
55900-BATCOV
4.
Sensor
55800-SEN
5.
2 “C” Batteries
BATTERY “C”
6.
Sensor Protector
55100-10042
7.
Replacement Filters (3)
55800-FILTER
1
7
2
3
4
5
6
WARNING: This product contains one or more chemicals known to the State of California to cause cancer, birth defects or
other reproductive harm.
