10
Button Press Function Comment
Fn + Vs Increment in 10 V steps Voltage range between
50 and 1000 V
Fn + Vt Decrement in 10 V steps Voltage range between
50 and 1000 V
Fn + Vs Increment in 25 V steps Voltage range between
1000 and 5000 V
Fn + Vt Decrement in 25 V steps Voltage range between
1000 and 5000 V
Fn + Ts or Tt Cycle through timers Select main timer, T1
or T2
Fn + Mode Cycle through IR modes Select breakdown,
burn or alarm limit for IR
test
Fn + Download mode See ‘Downloading
results’
Fn + Clear stored data The ‘record’ button is
pressed twice
Mode button
Press down on the ‘MODE’ button to cycle through and select the test
mode. Modes of test to be chosen from include an insulation resistance
‘IR’ test, a polarization index ‘PI’ test, a step voltage ‘SV’ test, and a
dielectric discharge ‘DD’ test.
The insulation resistance ‘IR’ test operates in either ‘burn’ or ‘breakdown’
mode, with an option of setting a resistance threshold ‘alarm limit’. These
modes can be cycled through and selected by holding down the Fn
B button
Pressing this button toggles the display backlight on and off.
Fn button
The function button when pressed allows other keys to perform another
function. This is summarized in the table below. ‘Vs and ‘Vt represent
the test voltage buttons. ‘Ts and ‘Tt represent the timer buttons.
Press Ω/I
Press Ω/I
Figure 4 - The result of a step voltage (SV) test
Test condition: timer defaults to 5 minutes and test voltage defaults to
1000 V.
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