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Figure 30
RETURN LEAD TO
PUMP DRAIN OPENING
Dangerous voltages are present during the following
Hi-Pot testing. Severe electric shock can result and
could prove fatal. Only qualified technicians should
perform these tests.
WARNING
ELECTRICAL SAFETY TESTS
Whenever repairs on any AEU-7000L/7000E unit
involves safety issues, such as electrical malfunctions or
changeout of critical components in the electrical circuit,
i.e., main power board or transformer, it is recommended
that the Hi-Pot and/or Ground Bond Safety Tests below
be performed after repairs are completed. If the tech-
nician determines that Safety Tests are required, the tests
should consist of three separate tests, typically performed
in tandem via a single Hi-Pot test/measurement device:
1.
Perform Electrical Safety Tests:
1.1.
Attach an AE-230L-40 motor (7000L) or an AE-
230M-40 motor (7000E) to the unit console.
1.2.
Conduct a Ground Bond Test between Earth
Ground at the power inlet and the chassis at the
pump drain opening (see Fig. 30). Test
parameters are 25 Amps for two seconds with
an allowed resistance of no more than 0.1
Ohms.
1.3.
Conduct a Dielectric Withstand Test between
Mains at the power inlet and the pump drain
opening (see Fig. 30). Perform test with the
power inlet switch in the “ON” position. Test
parameters are 2520 VDC for one second with
an allowed leakage current of 1.0mA.
1.4.
Conduct a Dielectric Withstand Test between
Mains at the power inlet and the motor housing
(see Fig. 31). Test is to be performed with the
power inlet switch in the “ON” position and the
return lead of the test equipment connected to
the E-coupling of the motor body. Test
parameters are 4250 VDC for one second with
an allowed leakage current of 1.0mA.
2.
Using a multimeter (Amprobe 38XR-A or equivalent
meter with 0.01nF resolution), measure the
capacitance between the sheet metal chassis of the
console and the DC return pin (Pin #4) of the
footswitch connector (see Fig. 32). Result is
acceptable if the capacitance measured is 5.3-8.0
nF.
IMPORTANT: Any system that fails any of the
above tests must be removed from service and
thoroughly examined, repaired and retested by a
qualified technician.
NOTE:
Although Aseptico uses the Associated
Research, Inc. Model 7564SA Hipot/Ground Tester
for these tests, alternative equipment with
equivalent setup and testing specifications may be
used. Ensure that the above test parameters are
set up correctly before conducting the tests.
Figure 31
Figure 32
MEASURE
BETWEEN
CHASSIS AND
PIN#4
