FLUKE 1550C Insulation Resistance Tester, 5 kV, 1 TΩ

User Manual for the Fluke 1550C Insulation Resistance Tester, 5 kV, 1 TΩ - Page 16

For 1550C.

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1550C photo
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1550C/1555
Users Manual
12
Dielectric Absorption Ratio
As part of the insulation test, the Tester measures and stores dielectric
absorption ratio (DAR), when appropriate. A DAR test requires
1 minute to complete. Therefore, it is measured and stored as invalid
data for all insulation tests <1 minute. When an insulation test is
1 minute, the DAR test is included in the results. The results are
available for display during a test by pushing the
button or by
storing the test results and scanning the RESULTS fields. The field is
identified by:
The Tester also does the DAR test in accordance to the Chinese
standards:
Capacitance
As part of the insulation test, the Tester measures and stores
capacitance when appropriate. The results are available for display
during a test by pushing the
button or by storing the test results
and scanning the RESULTS fields. The field is identified by C=.
Insulation Test
XW Warning
To prevent possible electric shock, fire, or personal
injury:
Be aware that insulation resistance measurement
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 you do a circuit
test with the Product.
Before proceeding, ensure that the installation is wired
correctly and no personnel are endangered by any
tests.
Connect the test leads to the Product inputs before you
make connection to the circuit under test.
PI/DAR Limits:
Cap. Max >1 μF and Res. Max >100 MΩ
Res. Min <200 kΩ
Current min <50 mA
If a limit is exceeded, the Tester shows UNSPEC. on the display.
To perform an insulation test:
1.
With the Tester turned on, set the available measurement options
to meet the test requirements. These include:
Test Voltage
Set range: 250 V to 1000 V (50 V steps)
Set range: 1000 V to 10 000 V (100 V steps)
Note
5000 V max for 1550C.
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.
DAR =
R
@
1 min
R
@
30 sec
DAR [CN]=
R
@ 1 min
R
@ 15 sec
1.888.610.7664 sales@GlobalTestSupply.com
Fluke-Direct
.com
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