Bosch BEA 750 - Checking Display Stability; Sensor

1 689 989 344 2017-12-12| Robert Bosch GmbH
Maintenance | BEA 750 | 27 en
i Affix the sticker 1 689 980 296 to each new coarse
filter GF3. The applicable date and the signature of
the person performing the work must be marked
on the stickers. The date provides a reference for
the replacement interval and the signature confirms
authorized coarse filter replacement. Use a non
water-soluble felt-tip pen for labeling the sticker.
Datum/Date
Unterschrift/Sign
459558/24 Ha
Fig. 9: Sticker 1 698 980 296
7.4.5 Checking display stability
¶ Detach the hose at the exhaust gas measurement
inlet of the BEA 750.
i There must not be any engine exhaust gases,
gasoline or cleaning agent vapors in the atmosphere
in the vicinity of the BEA 750.
Select "Diagnosis >> Engine/gas values" in the Bosch
Emissions Analysis. The current gas values are
displayed following zero calibration and the HC residue
test.
Observe the display for approx. 2minutes with regard
to limit values and stability.
Fluctuation error limits (noise):
Gas Set value Fluctuation
CO 0 % by vol ±0.005 % by vol
CO
2
0 % by vol ±0.2 % by vol
HC 0 ppm by vol ±12 ppm by vol
O
2
20.9 % by vol ±0.4 % by vol
The HC display must have settled after approx.
2minutes to a value < 12 ppm by volume.
7.4.6 O
2
sensor
Over the course of time, the O
2
sensor is subject to
wear. The oxygen measurement zero point is constantly
monitored. In the event of deviation, a fault message
appears. The message indicates the need for O
2
sensor
replacement.
! Use is only to be made of a genuine O
2
sensor
with the designation BOSCH A7-11.5 or
CLASSR-17ABOS (order number 1 687 224 727).
The O
2
sensor contains an alkaline solution.
Alkaline solutions cause severe burns on
bare skin.
¶ Do not open or damage the O2 sensor.
¶ Wear safety goggles.
¶ Wear protective gloves.
¶
Immediately rinse any areas of skin affected
with water at least 15 minutes and then
consult a doctor.
! Old O
2
sensors are classed as hazardous waste
and must be disposed of in accordance with
the applicable regulations. The disposal code is
16 05 02 (European waste catalog: EAK code).
In addition, these parts can be sent back to the
manufacturer for disposal.
7.4.7 NO sensor
Over the course of time, the NO sensor is subject
to wear. The zero point of the NO measurement is
constantly monitored. In the event of deviation, a fault
message appears. The message indicates the need for
NO sensor replacement.
! Always use the genuine NO sensor (NOXO 100 Nitric
Oxide Sensor; order number 1 687 224 954).
The NO sensor contains acid.
Acids cause severe burns on bare skin.
¶ Do not open or damage the O2 sensor.
¶ Wear safety goggles.
¶ Wear protective gloves.
¶
Immediately rinse any areas of skin affected
with water at least 15 minutes and then
consult a doctor.
! Old NO sensors are classed as hazardous waste
and must be disposed of in accordance with the
applicable regulations. The disposal code is 16 0502
(European waste catalog: EAK code). In addition,
these parts can be sent back to the manufacturer for
disposal.