Specifications

PCA
®
3
86
6.1 PCA
®
3 Disassembly
The following procedure describes how to disassemble the analyzer, while
Figures 6-1 thru 6-4 illustrate how the analyzer is put together.
Tools Required:
• Medium Phillips Screwdriver
Procedure:
1. Unplug all thermocouples from
bottom of analyzer.
2. Remove battery cover and then
remove batteries.
TIP: In Step 3, if the sensors
are not being replaced, leave
the tubing connected to each
sensor’s gas cap, being careful
not to put unnecessary strain
on the tubing during the
disassembly process.
3. Pull off sensor retainer; and
then unplug all sensors.
4. Lay analyzer face down
on a padded work surface; and then using a medium Phillips
screwdriver, remove the unit’s four rear-case screws.
5. Lift rear case from analyzer and set aside.
6. Unplug electrical connectors J8, J9, and J14 from printed circuit
board.
CAUTION: In Step 7, note that there is tubing connected
between the bottom hose-connector plate and the pressure
sensor on the printed circuit board. Do not put unnecessary
strain on this tubing during the disassembly process.
7. Carefully lift battery-and-pump chassis, along with the bottom
hose-connector plate, from analyzer.
8. Lift printed circuit board from analyzer.
Rear Case Screws
(typical 4 places)
Release and then
remove battery
cover by pushing
latch up
Figure 6-1. Removing the Rear Case