Automatic Measuring Range - AEMC 5050 User Manual

NOTE: This adjustment provides the best compromise between the
measurement build-up time and the presence of external interference
voltages (§3.2).
If no interference voltage is present, choose 0.03 to obtain a rapid measurement
build-up time.
Example: If an insulation measurement is performed at a test voltage of 5000V
and the limit is set to 0.10, it will be possible to perform a correct measurement
with the presence of an external interference voltage ≤500V to the detriment of a
longer measurement build-up time.

2.6.12 Automatic Measuring Range

In SET-UP, press the
■ "rAnG" appears in the small display.
■ "Auto" appears in the main display.
Use the button to choose a fixed (1, 2, or 3 on the main display) or automatic
(Auto on the main display) measurement range.
NOTE: The fixed measurement ranges correspond to the current
ranges of the following measurements:
1. 50pA to 200nA (>500GΩ).
2. 150nA to 50µA (500KΩ to 500GΩ).
3. 30µA to 3mA (<500KΩ).
The choice of a fixed measurement range optimizes the measurement build-up
time for a known value of insulation resistance.
Example: Choice of range 1 for a measurement greater than 500GΩ.
In most cases, "Auto" should be selected.
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button six times:
Megohmmeter Models 5050 & 5060