Maintenance
9
Leakator 10
Instruction 0019-9167
5.1 Replacing the Sensor
Replacement sensors are classifi ed at the factory according
to sensitivity, and are shipped with a matching resistor that
ensures the sensor will function properly when installed in
your instrument. It is important that the sensor and its resistor
be used together – DO NOT intermix resistors and sensors.
Items required:
• Small and medium fl at-blade screwdrivers
• Wire cutter
• Replacement sensor with matching resistor (P/N 0019-
0398)
Procedure:
1. Turn OFF instrument.
2. Pry sensor out of its socket using a small fl at-blade screw-
driver (Fig 4) and discard.
3. Remove battery cover.
4. Remove old matching resistor (Fig 5) and discard.
5. Locate new sensor’s matching resistor; then cut and bend
the resistor leads using the forms that are molded into the
battery cover (Fig 6). Note that If the resistor leads are cut
too short, the instrument may not function.
6. Insert new matching resistor into printed circuit board,
and plug new sensor into socket at end of probe. Notice that
the sensor’s six pins and the socket are symmetrical and not
keyed, thus permitting the sensor to be plugged in two ways.
The socket, however, is wired so that it doesn’t matter which
way the sensor is installed.
7. Install battery cover.
8. Test instrument response (refer to Section 4.2).
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