Single Gas Instrument Service Manual
Instruction 0019-9166
Bacharach, Inc.
Page
7
2.3
Cleaning
The inside of the chamber assembly is the only part of the instrument that needs
to be cleaned. To clean the chamber assembly, proceed as follows:
Equipment Needed:
•
Screwdriver, No. 1 Phillips head
•
Clean rags
•
Screwdriver, 1/8"
fl
at-blade
•
Cotton Swabs
•
Warm soapy water
•
Pipe cleaners
•
Allen Wrench, .05 in.
Procedure:
1. Open the case as described in Section “2.1 Opening the Case.”
2. Using
a
fl
at-blade screwdriver, remove the three screws and nuts that secure
the Sensor to the chamber assembly; DO NOT remove the sensor wires.
Then remove the Sensor along with its O-ring and Membrane from the
chamber assembly.
3. Using a No. 1 Phillips-head screwdriver, disassemble the chamber assembly
by removing the two screws and nuts that secure the Chamber to the Motor
Assembly
(Fig
2-3).
NOTE:
Do not remove the Fan Assembly unless it's absolutely neces-
sary for cleaning or repair purposes.
4. If it is necessary to remove the Fan Assembly,
fi
rst loosen the set screw on
the Fan Assembly with the .05 in. Allen wrench, and then pull off the assem-
bly.
NOTE:
It is not necessary to disassemble the Motor Assembly. If
motor replacement is required, refer to Section 2.6, Step 5.
5. Clean the Fan Assembly, Chamber & Motor Assembly (see Fig 2-3) using
cotton swabs and clean rags dampened with warm, soapy water. After clean-
ing, dry all parts with clean dry rags and cotton swabs.
NOTE:
Replace, DO NOT CLEAN, the Membrane (Fig 2-2) if dirty.
6. Clean the Chamber’s inlet and outlet ports using pipe cleaners dipped in
warm, soapy water. After cleaning, dry them with clean dry pipe cleaners.
7. Reassemble the chamber assembly as follows:
NOTE:
DO NOT overtighten any screws; damage to plastic parts
will
result.
