Mindray A8 Service Manual

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3. Press the switch again (for the second time) and verify that the work light is at high
brightness.
4. Press the switch again (for the third time) and verify that the work light is off.
5.18.3 Electrical Safety Inspection Test
CAUTION
 The electrical safety inspection should be performed once a year.
1. Perform the protective earth resistance test:
a. Plug the earth resistance probes of the safety analyzer into the protective earth terminal and
equipotential terminal of the AC power cord.
b. Test the earth resistance with a current of 25 A.
c. Verify that the resistance is less than 0.1 ohms (100 mohms).
d. Plug the earth resistance probes of the safety analyzer into the protective earth terminal of
the AC power cord and the protective earth terminal of any auxiliary outlet. Repeat steps b
and c.
e. If the resistance is greater than 0.1 ohms (100 mohms) but less than 0.2 ohms (200 mohms),
disconnect the AC power cord and plug the probe that is previously plugged in the
protective earth terminal of the AC power cord into the protective earth terminal of the AC
power outlet. Repeat steps a to d.
2. Perform the following earth leakage current tests:
 Normal polarity;
 Reverse polarity;
 Normal polarity with open neutral; and
 Reverse polarity with open neutral.
3. Verify that the maximum leakage current does not exceed 500 μA (0.5 mA) in the first two
tests. While for the last two tests, verify that the maximum leakage current does not exceed
1000 μA (1 mA).
4. If the BIS and NMT modules are configured, perform the following patient leakage current
tests:
 Normal polarity;
 Reverse polarity;
 Normal polarity with open neutral;
 Reverse polarity with open neutral;
 Normal polarity with open earth;
 Reverse polarity with open earth;
 Normal polarity with mains on AP; and
 Reverse polarity with mains on AP.
5. Verify that the maximum leakage current does not exceed 100 μA (0.1 mA) in the first two
tests. For the next four tests, verify that the maximum leakage current does not exceed 500
μA (0.5 mA). And for the last two tests, verify that the maximum leakage current does not
exceed 5000 μA (5 mA).

Mindray A8 Specifications

General

Brand	Mindray
Model	A8
Category	Medical Equipment
Language	English