Fluke 1508 User Manual page 23

•
The primary display shows ---- until you press the
T button and a valid resistance reading is
obtained.
•
The high voltage symbol (Z) along with a primary
display of >30 V warns if voltage greater that 30
V ac or dc is present. If high voltage is present,
the test is inhibited.
Press and release T to start the test. During
5.
testing, the secondary display shows the test voltage
applied to the circuit under test. The high voltage
symbol (Z) along with a primary display showing the
resistance in MΩ or GΩ appears. The t icon
appears on the lower portion of the display until the
test is finished.
When the test is completed, the PI or DAR value is
displayed on the primary display. The circuit under
test will automatically be discharged through the
Tester. If either value used to calculate PI or DAR
was greater than the maximum display range, or the 1
minute value was greater than 5000 MΩ, the primary
display will show Err.
•
When resistance is higher than the maximum
display range, the Tester displays the > symbol
and the maximum resistance for the range.
Measuring Polarization Index and Dielectric Absorption Ratios
•
To interrupt a PI or DAR test before it is
completed, momentarily press T. When you
release T, the circuit under test will
automatically be discharged through the Tester.
Insulation Testers
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