Other Functions; Filter; Voltmeter - TENTECH MD1035x Manual De Uso

If this key is pressed before the 1-minute period has elapsed, the display
will show DAI = - - -. The Dielectric Absorption Index is the ratio between
the insulation resistance value measured after 60 seconds and the value
measured after 30 seconds. This value is useful to determine whether it is
necessary to perform preventive and predictive maintenance on the coils
(transformers, engines and motors, generators, etc.).

7. Other functions

7.1. Filter

When insulation measures are carried out in transformers or in large
dimension machines, in presence of strong electromagnetic fields, it is
possible that the equipment reading is unstable, especially for resistance
values higher than 100 MΩ. In these cases it is convenient to press the
 key before starting the measurement. This function allows to reach
the insulation resistance value in an upward curve without significant
oscillations.

7.2. Voltmeter

By pressing the  key, the equipment will measure the voltage
effectively applied to the element being tested.
R
60 seconds
DAI
=
R
30 seconds
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