(Up To Software Version A10); O 2 Measuring Sensor; Replacing The Battery; Installing The O Measuring Sensor - Bosch ETT 008.31 Repair Instructions

10.6 Installing the O measuring sensor
2

(up to software version A10)

- Disconnect the exhaust-gas analyzer from the mains.
- Unpack the O measuring sensor and unscrew the closure cap.
2
Leave the O-ring on the screw-in gland of the O
sensor.
! Remember the adjustment time of 30 minutes.
- In the case of exhaust-gas analyzers without built-in O
ring sensor, remove the closure cap from the screw-in gland on
the rear of the device.
- In the case of exhaust-gas analyzers with already integrated O
measuring sensor, remove the connector from the O
ring sensor located on the rear of the device and unscrew the
O measuring sensor.
2
- Screw in the new O measuring sensor by hand without using
2
tools. Ensure that it is completely tight.
- Plug the connector into the O
Before putting the device into operation, the zero of the O
measuring sensor must be calibrated with test gas (14% CO
N ). The zero must be checked at half-yearly intervals and re-
2
calibrated if incorrect because of measurements of the excess-
air factor.
Work procedure:
- Connect the exhaust-gas analyzer to the mains and switch on.
Wait until the warm-up time of 3 minutes is over.
- In input mode (see Section 4.1.8), press the Select button 8 x.
"0F.An" appears in the temperature/lambda display field.
- Press the Enter/Cursor Up key together with the Select key.
Now "0F.Ei" appears in the temperature/lambda display field.
In the O display field, "0FF5" appears (no offset for O
2
measurement). The engine-speed field contains a display in
millivolts.
- Connect a test-gas bottle to the calibration-gas inlet and
introduce calibration gas at an admission pressure of 0.7 bar.
The millivolt display in the engine-speed display field drops with
the flow. Once it has fallen below 80 mV, the display "0FF5" in
the O display field disappears. Zero has been found when the
2
millivolt display remains constant. Store the zero by pressing
the Select key.
58
measuring
2
measu-
2
measu-
2
measuring sensor.
2
10.6.1 Installing and calibrating the O2 measuring sensor
(from software version A13)
- Disconnect the exhaust-gas analyzer from the mains.
- Unpack the O measuring sensor and unscrew the closure cap.
2
Leave the O-ring on the screw-in gland of the O
sensor.
! Remember the adjustment time of 30 minutes.
- In the case of exhaust-gas analyzers without built-in O
ring sensor, remove the closure cap from the screw-in gland on
the rear of the device.
In the case of exhaust-gas analyzers with already integrated O
2
measuring sensor, remove the connector from the O
ring sensor located on the rear of the device and unscrew the
O measuring sensor.
2
- Screw in the new O
tools. Ensure that it is completely tight.
- Plug the connector into the O
- Connect the exhaust-gas analyzer to the mains and switch on.
2
in Wait until the warm-up time of 3 minutes is over.
2
- Press the Select button on the rear of the device 8 x. Hold the
Select button whilst pressing the Enter button. An automatic
sequence now takes place.
10.02
870
5P 0F:Ei
Zero adjustment is initiated. For this, the pump runs for approx.
30 seconds. During this time, the zero of the O
sor is measured and stored in the exhaust-gas analyzer.
28.05
2
2525
0F:Ei
The current date is shown in the HC and CO display windows.
In the O display window, the voltage value of the O
2
sensor appears.
Limit values: 1.850V to 3.550V
Quit adjustment mode by pressing the Select button.
10.7

Replacing the battery

! The battery must be replaced with the exhaust-gas analyzer
switched on, as otherwise the device settings will be lost.
- Carefully lift the contact springs of the battery and remove the
battery. The + (positive) side is the visible side of the battery.
- After the battery has been replaced, a function check must be
carried out (see Section 5.4).
measuring sensor by hand without using
2
measuring sensor.
2
98
99
measuring
2
measu-
2
2
measu-
2
measuring sen-
2
measuring
2