B Button; Fn Button; Mode Button Timer L And M Buttons - Megger MIT520/2 User Manual

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. 'VL and 'VM represent the
10
Press Ω/I
test voltage buttons. 'TL and 'TM represent the timer buttons.
Button Press
Fn + VL
Fn + VM
Fn + VL
Fn + VM
Press Ω/I
Fn + TL or TM
Fn + Mode
Fn +
Fn +
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
Function
Increment in 10 V steps
Decrement in 10 V steps
Increment in 25 V steps
Decrement in 25 V steps
Cycle through timers
Cycle through IR modes
Download mode
Clear stored data
Comment
Voltage range between
50 and 1000 V
Voltage range between
50 and 1000 V
Voltage range between
1000 and 5000 V
Voltage range between
1000 and 5000 V
Select main timer, T1 or
T2
Select breakdown, burn
or alarm limit for IR test
See 'Downloading
results'
The 'record' button is
pressed twice