Fresenius Medical Care 4008 E Technical Manual page 117

TSC MA No.
8
TSC 8.1
TSC 8.2
TSC 8.3
L
N
PE
2-12
Fresenius Medical Care 4008 4/09.03 (TM)
Description
Checking the electrical safety
In Germany according to DIN VDE 0751 standard – 1
In other countries, observe the local regulations!
For measuring points, see 2.1.4 Notes – Checking the electrical safety.
Visual inspections performed
Protective earth resistance
Measurement of the leakage current (device leakage current)
Differential current measurement according to fig. C.6
L ( N )
N ( L)
or
Direct measurement according to fig. C.5
L
N
M D
PE
Basic conditions:
– Measurement of the protective earth resistance has been completed.
– Perform the measurement with the machine being at operating temperature
in the Dialysis or Preparation operation mode.
– Dialysate:
Dialysis temperature > 37°C
Dialysate flow 300 ml/min
Conductivity 13 mS/min
– When performing a direct measurement, the following precautions must be
observed:
The device must be installed under insulated conditions.
All external connections must have been removed from the device.
Expected value / function
see item 1 Visual inspections
Max. 0.3 Ω (with power cord)
M 1
st Edition 10/2001.