5.0 General Information Regarding the
Performance of Measurements and Tests
For any tasks the respectively valid accident
prevention prescriptions issued by the ge-
werbliche Berufsgenossenschaft [German em-
ployer liability insurance association] for elec-
trical systems and equipment must be met.
Measurements in dangerous proximity of el-
ectrical systems are only to be carried out in
compliance with the instructions of a respon-
sible electrician, and never alone.
Prior to any use, check measurement instru-
ment and test leads are in working order.
Test leads and test probes may only be touched
at the handles provided. Never directly touch
the test probes.
The maximum admissible voltage between vol-
tage connection sockets (reference voltage)
amounts to 500 V AC/DC! The maximum ad-
missible voltage of the test connections to-
wards ground amounts to 440 V AC/DC!
When performing measurements on shock-
proof plugs or equipment with protective con-
ductor connection always check the protective
conductor for correct connection. For this pur-
pose, briefly touch the contact electrode ‘PE”
(21) of the test instruments before starting the
measurement, whereby the leads are connec-
ted. If an acoustic sound is audible and the (14)
and 'PE error’ (16) symbols are displayed, the
PE connection must be verified! The tests may
only be started once the protective conductor
is in order! During protective conductor test, it
must be ensured that the measurement result
is not influenced by an insulated floor or site.
If the symbols (14) and 'Test Current Error'
(18) are displayed during the measurement,
this indicates that a built-in fuse has blown and
must be replaced (please refer to section 9.0).
Mains bias and compensation procedures be-
cause of test load can impair the measurement
results. Therefore, several tests should be per-
formed and compared. In order to obtain a re-
producible and reliable test result, it is advised
to switch off all loads or to disconnect from the
mains.
The test result is cleared once the test leads or
the mains plug have been disconnected from
the system/socket under test and reconnected
to mains voltage. Thus, an unambiguous as-
signation of the result displayed with referen-
ce to the system/plug is possible, as the LCD
always displays the condition of the currently
connected system/socket.
9
General Information
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