Operation Manual

08/ 2012 26 / 58

BENNING ST 750 A
10.4 Manual Tests according to VDE 0701-0702 or VDE 0751
Onthemainscreen,theindividualtests/measurements"Testacc.toVDE0701-0702"or"Test
acc.toVDE0751"canbeselectedbypressingthecorrespondingbutton.
→
Afterhavingenteredtheprotectionclass,the"VisualInspection"menuisdisplayed.Conrmwith
<OK> to continue with the test! For manual measurement, the individual tests / measurements can
be carried out in any order. Normally, however, the order of the individual measurements (tests) has
tobeobservedabsolutely(seechapter11,"StandardTestProcedures"),becausethemeasurement
has to be stopped immediately in case of a failed test. Only after troubleshooting, the test can be
repeated right from the beginning.
Forthersttest/measurement,thetesterstartsaconnectiontesttodetermine,whetherdangerous
contact voltage is applied, whether a test sample is connected and that there is no short-circuit. After
a positive connection test, the measurement is started.
In case of a negative connection test (e.g. open switch), an information message is displayed.
Anotherconnectiontestwillonlybestartedwhenthe"VisualInspection"menuhasbeenpassed
through once again. The test duration is determined by the time between the actuations of the
<Start>/ <Stop> button. An exception is the measurement of the protective conductor resistance
with 10 A. Here, the switch-on time is automatically limited to 5 seconds due to thermal reasons.
By pressing the <Pause> button, it is possible to interrupt measurement so that e.g. the test cable
with the alligator clip or probe tip can be connected to another measuring point without resulting in
incorrect measurements / indications.

Attention! Pressing the <Pause> button will stop the measurement. During the pause,
the test socket will remain live!
Incorrect measured values can be deleted by pressing the <Reset> button. Press <Setup> to get
tothesetupscreen.Onthisscreen,itispossibletomakealldevicesettings(seechapter7,"Com-
missioning/Setup").
Press <About> to call the help function.
10.4.1 Devices with PE (Protection Class I)
Protection class I: Devices with protective conductor connection
Menu, VDE 0701-0702 (protection class I) Menu, VDE 0751 (protection class I)
Selection of individual measurements (tests according to VDE 0701-0702):
RPE Protective conductor resistance ICont Contact current
RInsu-1 Insulating resistance LN–PE Funct. Functional test
RInsu-2 Insulating resistance sec.–PE Cable Continuity test
RInsu-3 Insulating resistance LN–sec. Ua Safety extra-low voltage
IPE Protective conductor current
Selection of individual measurements (tests according to VDE 0751):
RPE Protective conductor resistance PLeak Patient leakage current
RInsu-1 Insulating resistance prim.–PE Funct. Functional test
RInsu-2 Insulating resistance sec.–PE Cable Continuity test
RInsu-3 Insulating resistance prim.–sec.
ILeak Device leakage current
10.4.2 Devices without PE (protection class II)
Protection class II: Devices without protective conductor connection
Menu, VDE 0701-0702 (protection class II) Menu, VDE 0751 (protection class II)