Safety Test; (To Din 57411 / Vde 411); Checking The Protective Earth; Voltage Test - Bosch ETT 008.31 Repair Instructions

11.

Safety test

(to DIN 57411 / VDE 411)

11.1

Checking the protective earth

11.2

Voltage test

60
The mains plug is removed, the mains switch of the specimen device is switched on.
Following assembly work on the exhaust-gas analyzer, check that all protective conduc-
tors are correctly connected and mechanically secure. For protective-conductor con-
nections, refer to the circuit diagram in Sections 12.1 and 12.2.
Test the protective-conductor contact of the mains plug to the floor panel of the pump
housing and to the mains transformer:
Check the mains plug and contacts L and N to the protective conductor:
R > 10 MΩ Ω Ω Ω Ω
The exhaust-gas analyzer is fully assembled, the mains plug is withdrawn and the mains
switch of the specimen device is switched on. Group the terminals as follows:
Group Designation
I Auxiliary power
I I Protective conductor
Engine-speed input
Oil-temperature input
Serial interface
Checking:
Group I (auxiliary power) to Group II, test voltage U
Remove all test connections, check the start-up of the exhaust-gas analyzer until the
warm-up phase is reached.
R < 1 Ω Ω Ω Ω Ω
Terminals
L and N on mains plug
Contact on mains plug
All
All
All
= 2.1 KV
DC