Bosch CB 28 - Starting the Test Procedure; Description of the Pump Test; Maintenance; Maintenance Intervals

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6. Maintenance
6.1 Maintenance intervals
Maintenance task
Weekly 2 yearly
*)
Check hose lines (see sec. 6.2)
X X
*)
To be performed during the main inspection by test service/cus-
tomer service
6.2 Check exhaust gas sampling hoses
Always handle exhaust gas sampling hoses (high-
pressure and low-pressure hoses) with care and check
before use. Hoses are to be replaced if checking reveals
the following damage:
R Cracks, brittle areas, abrasion or blistering of the
hose jacket
R Kinked exhaust gas sampling hose
R Stiff union nuts or quick-release couplings
R Deformed or damaged connection end of exhaust
gas sampling hose (sealing cone, plug-in nipple,
etc.)
R Leakage at hose fitting
R Corrosion at hose fitting if strength is reduced as a
result
R Service life exceeded
(see sec. 6.3)
! Damaged hose lines must not be repaired.
6.3 Replacing the high-pressure hose
Replace high-pressure hoses (operating pressure great-
er than 60bar) after 3 years (see date of manufacture
on high-pressure hose) even if there are no apparent
defects of relevance to safety.
5.2 Starting the test procedure
1. In the system software, call up the desired test se-
quence in the 'Component selection' dialog box.
2. Call up the measurement screen.
3. Select test step '1'.
4. In the 'Measuring functions' selection menu, acti-
vate the Automatic on/off function.
 The automatic mode symbol flashes in the operat-
ing status display.
5. Press <F8> to start the test.
6. Set the feed pressure for the pump.
7. In the 'Measuring functions' selection menu, activate
the Channel detection function.
 The software automatically detects the active
measuring channels.
" The testing system and CB28 are ready for the test.
5.3 Description of the pump test
Once the test has been started and automatic mode
has been activated, the waiting and measuring times
begin as soon as the specified setpoints are reached.
After the times have elapsed, the software automati-
cally switches to the next test step and saves the test
results in the test protocol.
When the last test step is reached and the measuring
times have elapsed, the test bench comes to a stop and
the test is complete.
Press <F12> to call up the test protocol.