Sonel MRU-120 Handleiding

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Enabling auto-zeroing

Disabling auto-zeroing

Sonel MRU-120

Earth Resistance Meter QuickStart●

v1.00 | 26.05.2020

Connect the meter to the measured wire.

Run the measurement using START button.

2P

In order to eliminate the inuence of the resistance of the test leads

over the result of the measurement, its compensation (auto-zeroing)

has to be done.

Press START.

Using button enable mode.F1 AUTOZERO

Short-circuit the test leads.

Press START.

Using button enable mode.F1 AUTOZERO

Separate the test leads.

It is sufcient to realize compensation once for the given test leads.

It is also remembered once the meter has been turned off, until the

next successful auto-reset procedure.

First steps

Turn on the meter

Select the method and connect

Congure

Obtain the result

Measurements

The meter is designed for measurements at interference voltages which do not exceed 24 V

for RE measurements and 3 V for RCONTmeasurements. The voltage is measured up to 100 V,

but above 40 V is indicated as dangerous. The meter must not be connected to voltages ex-

ceeding 100 V.

UN>24V!

The voltage on the mea-

surement points exceeds

24 V but is lower than

40 V. The measurement

is blocked.

NOISE!

The value of the interfering

signal is too high. The result

may be distorted by additional

uncertainty.

LIMIT!

The uncertainty of the

electrode resistance

>30%. Uncertainties

calculated on the basis of

the measured values.

UN>40V!

and a contin-

uous

sonic signal

The voltage on the

measurement points

exceeds 40 V. The mea-

surement is blocked.

R>19,99kΩ

RE>19,99kΩ

RS>19,9kΩ

RH>19,9kΩ

ρ>999kΩm

Measurement range

exceeded. I

L>max

Excessive interfering

current, the measurement

error may exceed the

basic error.

Wire continuity measurement

Product specificaties