Page 64 of 64 Operation/Programming
11. Arc Pulse Width
The following selection determines the duration of pulse width when arc detection is in effect.
An arc failure will occur if any pulses are detected which exceed this duration and the
programmed arc level.
Press the UTILITY key and right arrow key to select Enhanced Features.
If Enhanced Features is set for On, press right arrow key to select Arc Pulse Width.
If Enhanced Features is set for Off, press up/down arrow key to select On and press
right arrow key to select Arc Pulse Width.
Press up/down arrow keys to select arc pulse width for 1 to 50µsec in 1µsec steps.
This entry determines the minimum width of current pulses which can be detected when
arc detection is turned on.
Press the UTILITY key to exit or move to other Utility functions with the right
Arrow key.
12. Adaptive DC Ramp
This function (not available on the Guardian 2510) is intended to optimize measurement speed.
Off should always be selected for DC Hipot and insulation resistance (IR) if the device under
test is essentially a pure resistance, or if the resistance is below 200 MΩ. This function should
be selected for On for insulation resistance measurements on devices >200 MΩ with substantial
parallel capacitance. With this function selected, if during ramp time the voltage across the
device exceeds the programmed voltage, the output voltage is reduced back within tolerance. To
avoid giving an incorrect value, the display will show “??????” in place of the IR value while
this voltage adjustment is taking place. In general, Adaptive DC Ramp should be turned On if
the IR test displays “??????” more than briefly during the test phase.
Press the UTILITY key and right arrow key to select Enhanced Features.
If Enhanced Features is set for On, press right arrow key to select Adaptive DC Ramp.
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