KLS Martin marLED E9 - Page 80

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Service ManualService Manual
Operating Lights marLEDOperating Lights marLED
®®
E9 / E9i / E9 / E9i / E15E15
8080 VV 1 01 0
2. Checking Potential Equalization / Protective Conductor (PE) Resistance2. Checking Potential Equalization / Protective Conductor (PE) Resistance
Tool required: measuring instrument (e.g. Bender Unimet 300 ST)Tool required: measuring instrument (e.g. Bender Unimet 300 ST)
Limits!Limits!
•• The measured value must be at least 0.2 A!The measured value must be at least 0.2 A!
••
 The no-load voltage shall not exceed 24 V but may not be less than 4 V, either!The no-load voltage shall not exceed 24 V but may not be less than 4 V, either!
•• Use an appropriate testing device when performing the measurement:Use an appropriate testing device when performing the measurement:
—— open circuit voltage 24 V maxopen circuit voltage 24 V max
—— Testing current at least 200 mA at 500 mOhmTesting current at least 200 mA at 500 mOhm
••
 If the testing current is direct current, the measurement has to be performed twice withIf the testing current is direct current, the measurement has to be performed twice with
both polarities.both polarities.
a) Mobile lighta) Mobile light
RR
imaximax
= 0.3= 0.3
ΩΩ
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1 1 Power Power supply supply cablecable
2 2 PE PE terminalterminal
3 3 Measuring Measuring instrumentinstrument
4 4 Measuring Measuring leadsleads
Fig. Fig. 10-5 10-5 Resistance Resistance measurement measurement on on mobile mobile lightslights
Check of the protective ground wireCheck of the protective ground wire
Between the protective ground contact on the power supply (2) unit and all accessible metalBetween the protective ground contact on the power supply (2) unit and all accessible metal
(M) parts of the light which are connected to the protective ground wire, the resistance is(M) parts of the light which are connected to the protective ground wire, the resistance is
determined using at least 200 mA of measurement current. 0.3 Ohm is the maximum value.determined using at least 200 mA of measurement current. 0.3 Ohm is the maximum value.
During this test the moveable power cable (1) should be moved repeatedly on its full length!During this test the moveable power cable (1) should be moved repeatedly on its full length!
NOTICENOTICE