Fluke 1507 User Manual page 11

Table 3. Buttons and Indicators
Button/
Indicator
Press the blue button to select alternate

measurement functions.
Press to configure the Tester for a
polarization index or dielectric absorption

ratio test. The test will start when you press
the  button.
Sets a pass/fail limit for insulation tests.

Test lock. When pressed before the 
button, the test remains active until you

press the lock or test button again to
release the lock.
Turns the backlight on and off. The

backlight goes off after 2 minutes.
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Button/
Description
Indicator
Initiates an insulation test when the rotary
switch is in
INSULATION
the Tester to source (output) a high voltage

and measure insulation resistance.
Initiates a resistance test when the rotary
switch is in the ohms position.
Unsafe voltage warning. Indicates 30 V or
greater (ac or dc depending on the rotary
switch position) is detected on the input.
Also appears when the display shows  in

the  switch positions, and when 
appears on the display. The  also appears
when insulation test is active.
Pass indicator. Indicates when the
insulation resistance measurement is

greater than the selected compare limit.
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Insulation Testers
Buttons and Indicators
position. Causes
7