Filter
Top Products
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
Figure 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
counterclockwise, and then
pulling the cup straight up.
7. Attach the gas cup to new sen-
sor, making sure that when the
sensor is plugged into analyz-
er’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