Bedienungsanleitung Benning ST 750A (Seite 30 von 58) (Englisch)

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BENNING ST 750 A

Besides the measuring result (measured

value), the overall result is displayed (e.g.

"Pass"byagreeneldand"Fail"bya

redeld).Accessibleconductiveparts

which are not connected with the protec-

tive conductor must be scanned by means

of the probe / probe tip (VDE 0751-1).

The protective conductor current is displayed

and the probe current is added! For measure-

ments by means of the current clamp, the

measured values have to be entered manually!

10.10 PLeak – Patient Leakage Current

The patient leakage current measurement corresponds to the measurement between all patient

connectionsofappliedpartsoftype"F"(medicalelectricaldevices)andprotectiveearthandacces-

sible conductive parts which are not connected to earth (protection classes I and II). The patient

leakage current can be measured by means of the leakage current measurement method, the direct

measurement method Dir or the alternative leakage current measurement method Alt..

Testing by means of the probe (probe tip) according to VDE 0751-1. In the start menu, select the

correspondingVDEregulationandthentheprotectionclass.Inthe"Testacc.toVDE....(Class.)"

menu, selection menu, press the <PLeak>button.Selectthedevicecategory("BF"or"CF")and

thedesiredmeasurementmethod("Dir"or"Alt.").Startmeasurementbypressing<Start>.

The limiting values according to VDE 0751 are taken into consideration.

Press <L-N> to measure with reversed polarity.

Finish or stop the measurement by pressing <Stop>, press <Pause>/ <Next> for a measuring

pause and press <Reset> to delete the measured value. Besides the measuring result (measured

value),theoverallresultisdisplayed(e.g."Pass"byagreeneldand"Fail"byaredeld).

Measuring circuit for leakage current measurement (direct measurement) of applied parts between

allpatientconnectionsofappliedpartsoftype"F"(medicalelectricaldevices)andprotectiveearth

and accessible conductive parts which are not connected to earth (protection classes I and II): Test-

ing by means of the probe (probe tip) according to VDE 0751-1. Accessible conductive parts which

arenotconnectedtoearthhavetobeconnectedtothe"PE"jackbymeansofasecondtestcable

(4)! Only the probe current is displayed!

10.11 Funct. - Functional Test

Only after a passed test, the test sample may be tested for correct functioning! The fault current

measurement is carried out as differential current measurement! In the start menu, select the corre-

spondingVDEregulationandthentheprotectionclass.Inthe"Testacc.toVDE....(Class.)"menu,

selection menu, press the <Funct.> button. Start measurement by pressing <Start>.

The limiting values according to VDE 0701-0702 or to VDE 0751-1 are taken into considera tion.

Press <L-N> to measure with reversed polarity. Finish or stop the measurement by pressing <Stop>,

press <Pause>/ <Next> for a measuring pause and press <Reset> to delete the measured value.

Besidesthemeasuringresult (measured value), the overall result is displayed (e.g."Pass"bya

greeneldand"Fail"byaredeld).

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