METREL MI 3295, Instruction Manual

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MI 3295 Step Contact Voltage Measuring System Measurements
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changing during the test the I
SET
parameter must be adjusted manually. The
measurement results cannot be corrected after the measurement.
7.2.3 Step voltage and Contact/Touch voltage measurements
While the Station injects the measuring current into earth the Step or Contact/Touch
voltage tests with the Meter can be carried out.
Figure 7.12: Step and Contact/Touch voltage screens
Test parameters for Step voltage and Contact/Touch voltage measurement
I flt Maximum expected fault current (
1 A ... 200 kA)
I set, I gen Test current manually set (
10 mA
… 50 A )
or uploaded from Station
R inp Input resistance (
1 MΩ, 1 kΩ, 2 kΩ
(with additional adapter A 1304))
U lim Limit step voltage (25 V, 50 V)
Step or Contact/Touch voltage measurements

Select STEP VOLT or U CONTACT/TOUCH function.

Set test parameters / limits (optional).

For Step voltage place the test electrodes (see chapter 7.1.3 Measurement for
more information).

For Contact/Touch voltage place one test electrode and connect accessible metal
part (see chapter
7.1.3 Measurement for more information).

Connect the test leads to the instrument.

Press the TEST key to perform the measurement.

Store the result by pressing the MEM key (optional).
Note:

The measurements can be carried out without synchronization. In this case the
measuring current must be controlled and set / changed manually. The results
cannot be corrected after the measurement.
Connections for Step voltage and Contact/Touch voltage measurement
For connections see Figure 7.2 and Figure 7.3 .
Figure 7.13: Examples of Step voltage and Contact/Touch voltage measurement results
Displayed results for Step voltage and Contact/Touch voltage measurements:
U ............. calculated Step or Contact/Touch voltage
Um...........measured Step or Contact/Touch voltage