Instruction 24-9448
3-1
Initial Setup
3 Initial Setup
3.1 Scope
Before using the PCA 2, you MUST:
• Install batteries, or plug in the optional AC power adapter (Section 3.2)
• Connect the probe and hose assembly (Section 3.3)
• Check, and if necessary, make changes to the analyzer’s configuration
(Section 3.4)
3.2 Power
3.2.1 Installing or Replacing Batteries
Either alkaline or NiMH rechargeable batteries can used to power the an-
alyzer. Note that if rechargeable batteries are used, they can be recharged
while installed inside the analyzer using the optional AC power adapter
(refer to Section 3.2.2).
Install or replace the batteries as described below:
1. Remove battery cover from back of unit (Figure 3-1.)
2. Remove (and properly dispose of) any old batteries.
3. Install a set of four ‘AA’ alkaline or NiMH batteries, per the “+” and “–”
markings inside the battery compartment.
4. Replace battery cover.
Figure 3-1. Installing Batteries
Release and then
remove battery cover
by pushing latch up
Instruction 24-9448
6-7
Maintenance
6.3 Smart Sensor Replacement
Bacharach’s Smart sensor technology allows new sensors to be installed
without needing to be calibrated inside the analyzer.
NOTE: Sensors may be purchased with and without the Smart sensor technology
PCB. See Section 6.4 on how to change just the sensor itself. Calibration must be
performed if the sensor is purchased without the Smart technology PCB. Refer to
Section 8.1 Replacement Parts for list of sensors and part numbers of both types.
Replace the oxygen sensor when its automatic calibration fails and the ana-
lyzer displays an O
2
sensor error at the end of warm up. Refer to Section 4.2.
NOTE: The O2 sensor and PCB is not Smart sensor technology. Only the sen-
sor itself, not the PCB, needs to be purchased when the sensor needs replaced.
Replace a gas sensor when it can no longer be calibrated, as evidenced by
“Bad Calibration Sensor End of Life” being displayed during its calibration
procedure. Refer to Sections 5.6 thru 5.10.
Refer to Section 8.1 for a listing of sensor part numbers. Also, see Fig-
ure 6-2 on page 6-3 for sensor positions.
Do the following to replace a Smart sensor:
1. Turn OFF the analyzer.
2. Remove the battery cover.
3. Remove the sensor retainer.
4. Remove the tubing from the gas
cup of sensor being replaced.
5. Unplug the sensor along with its
printed circuit board from the
analyzer’s main board.
6. Remove the sensor’s gas cup by
twisting its bayonet fitting coun-
terclockwise, and then pulling
the cup straight up.
7. Attach the gas cup to new sensor, making sure that when the sensor
is plugged into analyzer’s main board, the tubing connections on top
of gas cup are aligned as shown in Figure 6-3 on page 6-4.
8. Plug the sensor into analyzer; and then reattach tubing to gas cup.
9. Install the sensor retainer and battery cover.
10. Turn ON the analyzer and confirm that no sensor errors occur during
warm up.
Gas Cup
Sensor Retainer
Sensor
and Printed
Circuit Board
Twist gas cap
bayonet fitting
counterclockwise
to release
Sensor electrical
connector mates with
pins on analyzer’s main
board
