17
Test Lead Notes
CATIV 600V Measurement Locations
• Ensure the test lead shield is pressed firmly in place. Failure to use the CAT IV shield increases arc-flash risk.
CAT II Measurement Locations
• CAT IV shields may be removed for CAT II locations. This will allow testing on recessed conductors such as standard wall outlets.
Take care not to lose the shields.
WARNING:
Test Lead category protections apply only to test leads and should not be confused with the meter’s specific
CAT rating. Observe the maximum category protection indicated on the meter the test leads are plugged into.
4mm
18mm
4mm
18mm
Measuring Polarization Index and Dielectric Absorption Ratios
Polarization Index (PI) is the ratio of the 10-minute insulation
resistance. Dielectric Absorption Ratio is the ratio of the
1-minute insulation resistance to the 30-second insulation
resistance.
WARNING
• Insulation tests should only be performed on
de-energized circuits.
To measure polarization index or dielectric absorption ration;
• Use insulation and COM Input ports.
NOTE:
Because of the time required to perform the PI and DAR
tests, use of alligator clips is recommended.
• Set rotary function dial to INSULATION position and press
RANGE button
to select desired voltage.
• Press the
PI/DAR button
to select PI or DAR.
• The display shows “----” until
TEST button
is pressed
and a valid resistance is obtained.
IRT807
OFF
ZERO
kHz
Temp
SMOOTH
mV
mA
INSULA
TION
V
V
50V
1000V
INSULATION TESTER
MIN/MAX
LOCK
Hz
Test Voltage
F C
SELECT
TEST
RANGE
PI/DAR
A-HOLD
Apo
• Default =
SMOOTH
INSULA
TION
50V
1000V
• The High Voltage symbol warns if voltage of greater than 30V AC or DC is present. If High voltage is present, test is inhibited.
• Press and release the
TEST button
on the Meter or the Remote Probe to start the test. During testing, the display shows the
test voltage applied to the circuit under test. The high voltage symbol along with display showing resistance in MΩ or GΩ, the
TEST icon appears on the lower portion of the display until the test is finished.
• To interrupt PI or DAR test before it is completed, press
TEST button
. When you release the
TEST button
, the circuit under
test will automatically be discharged through the tester.
Features:
TEST
LOCK
A-HOLD
Test Voltage
F C
RANGE
Hz
PI/DAR
SELECT
NOTE:
Measurements can be adversely affected by impedances of additional operating circuits connected in parallel or transient
currents.
TEST
PI/DAR
• Default =
• Press x1 =
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