Single Gas Instrument Service Manual
Instruction 0019-9166
Bacharach, Inc.
Page
5
2.0 MAINTENANCE
2.1 Opening the Case
Figure 2-1.
Opening and
Closing the Case
Equipment Needed:
•
Phillips-head screwdriver, No. 1
Procedure:
1. Lay the instrument face down on a workbench; then detach the metal clip
from the bottom of case and fold the elastic strap over top of the instrument
(Fig 2-1).
2. Slide off battery cover.
3. Remove
batteries.
4. Using a No. 1 Phillips-head screwdriver, remove the two screws from the
rear of the case.
5. Lift up the bottom portion of the rear case and slide it forward until the case
clears the inlet port.
6. To gain better access to the components, remove the gas-sensing chamber as-
sembly (Chamber Assembly) and the Printed Circuit Board (P.C.B.) from the
front case by pulling them straight up from the front case (Fig 2 -2); then lay
these items on your workbench.
