Insulation Test - Fluke 1550C User Manual

1550C/1555
Users Manual

Insulation Test

To avoid possible electric shock or personal injury:
Be aware that measuring insulation resistance
requires the application of potentially dangerous
voltages to the circuit. This may include exposed
bonded metalwork.
Remove all power from the circuit under test and
discharge circuit capacitance before testing a
circuit with the Tester.
Before proceeding, ensure that the installation is
wired correctly and no personnel are endangered
by any tests.
First connect the test leads to the Tester inputs
before you make connection to the circuit under
test.
PI/DAR Limits:
Cap. Mdx > 1 F and Res. Max > 100 Me
Res. Min < 200 k e
Current min < 50 A
If one of the limits is beyond, the Tester will display UNSPEC.
To perform an insulation test:
1. With the Tester turned on, set the available measurement options to meet
your test requirements. These include:
Test Voltage – Set range: 250 V to 10,000 V (50 V/100 V steps)
Ramp Test – Toggle on or off
Time Limit – No limit or from 1 to 99 minutes
2. Connect the probes to the circuit under test.
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XW Warning