Fresenius Medical Care 4008 E Technical Manual page 118

TSC MA No. Description
Documentation covers the line voltage during the measurement and the
maximum device leakage current of both mains polarities scaled to the line
voltage of the power supply. Maximum device leakage current: 500 µA
Example:
Line voltage during measurement: 225 V
Device leakage current
for mains polarity 1: 180 µA
for mains polarity 2: 120 µA
Maximum value of both mains polarities: 180 µA
Nominal voltage of the power supply: 230 V
Scaled to nominal voltage: 184 µA
(180 µA : 225 V • 230 V = 184 µA)
Device leakage current < 500 µA: OK
Additional conditions:
If the device leakage current is higher than 90 % of the admissible alarm limit
(450 µA), the last measured value or the first measured value must additionally
be considered for the rating.
If the device leakage current considerably increased since the last measurement
or continuously increased since the first measurement (creeping deterioration of
the insulation), or if the sum composed of the current value plus the difference
since the last measurement is > 500 µA, the measurement has not been passed.
Example 1:
Leakage current: 470 µA
Last measured value: 450 µA
470 + (470 – 450) = 470 + 20 = 490
Example 2:
Leakage current: 470 µA
Last measured value: 390 µA
470 + (470 – 390) = 470 + 80 = 550
9 Functional check
TSC 9.1 Perform the functional test
MA 9.2 Hot rinse / disinfection
Expected value / function
OK
not passed
Press the Test key.
The machine must successfully pass the T1 test.
Run a disinfection program.
Fresenius Medical Care 4008 4/09.03 (TM)
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