After The Insulation Measurement - AEMC 6550 User Manual

Value of the insulation resistance
Value of the test voltage at the
end of the measurement
Ancillary results

4.4.9 After the Insulation Measurement

Once the measurement has been stopped, the instrument discharges the device being tested in a few seconds.
For your safety, therefore, wait before disconnecting the leads. Normally, this happens rapidly and the user is
unaware of it. But if the load is highly capacitive, the discharging time is longer. In this case, for as long as the
voltage exceeds 25V, the instrument indicates it on the display.
The DISPLAY button is used to look up all information available after the measurement. This information
depends on the type of measurement chosen (see § 2.4.4).
In the case of a ramp or step measurement, the measurement result is displayed as follows:
Test with programmed duration
Value of the insulation resistance
Value of the test voltage at the
end of the measurement
∆R: difference of insulation
resistance between the
resistance of the highest test
voltage and the resistance of
the lowest test voltage
∆V: difference between the
highest and lowest test voltage
36
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ALARM
995 MΩ
528 V
Elapsed Time 00:01:12
DAR (30s/60s)
PI (1.0m/10m)
Capacitance
995 MΩ
502 V
Elapsed Time 00:01:20
DAR (30s/60s)
PI (1.0m/10m)
Capacitance
5.03 GΩ
516 V
Elapsed Time 00:01:40
∆R
∆V
∆R/(R*∆V) (ppm/V)
Capacitance
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The alarm is enabled and the insulation
resistance is below the alarm threshold
E-BRK Type of test
531 nA
Current at the end of the measurement
Duration of the measurement
1.00
---
2.201 nF
E-BRK
503 nA
1.00
---
<1 nF
E-BRK
98.7 nA
Current at the end of the measurement
Duration of the measurement
47.9 MΩ
53.3 V
9
Voltage coefficient in ppm/V
< 1 nF
Capacitance of the device tested
Megohmmeter Models 6550/6555
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