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 10000 V
Fn + Vt Decrement in 25 V steps Voltage range between
1000 and 10000 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 button
Figure 4 - The result of a step voltage (SV) test
Test condition: timer defaults to 5 minutes and test voltage defaults to
1000 V.
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
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