Martin maxium Operating Instructions Manual page 82

6. Housing leakage current, first fault, mains: Measure the current flowing from the maxium's
equipotential bonding pin to ground upon interrupting the ground-related phase N (this switches
off the unit). As this current path constitutes a parallel path to the protective conductor, the
measured value is normally very low but non-defined because it depends on the indeterminate
relationship between the various grounding resistances involved. The measured value shall not
exceed the absolute upper limit of 500 µA.
7. Patient leakage current, normal case: Measure the currents from the instrument connectors
M1, M2, B1, B2 and NE to ground in non-activated condition. This can be done by paralleling
several connectors as long as such parallel connection does not lead to a measured value that
exceeds the upper limit of 10 µA as specified in IEC 601-1, section 19.3. Should this be the
case, all connectors must be tested separately and the highest value measured must be en-
tered in the test report. Please note that shorting the bipolar outputs B1 and B2 will cause an
error message during the self-test performed after switching on the unit. This leaves two op-
tions. Either you can use test cables that are connected to only one pin of the outputs B1 and
B2, or you can perform the measurement manually after the self-test has been completed. In
this latter case, however, no current with auto-start function must have been selected!
8. Patient leakage current, first fault, protective conductor: Measure the currents from the instru-
ment connectors M1, M2, B1, B2 and NE to ground in non-activated condition and with the pro-
tective conductor interrupted. The absolute upper limit not to be exceeded is 50 µA, as speci-
fied in IEC 601-1, section 19.3. Besides, the provisions given under point 7 above shall apply.
9. Patient leakage current, first fault, voltage on applied part: Measure the currents from the in-
strument connectors M1, M2, B1, B2 and NE to ground in non-activated condition after
ground-related mains voltage has been externally applied to the maxium's connectors
via the power meter ! The absolute upper limit not to be exceeded is 50 µA, as specified in
IEC 601-1, section 19.3. Besides, the provisions given under point 7 above shall apply.
All safety checks and related results must be documented in the equipment
log!
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Martin maxium & maxium Beamer Operating Instructions
V 2.0