Sonel MRU-120HD Quick Start

Sonel MRU-120HD
Earth Resistance Meter ● QuickStart
The meter is designed for measurements at interference voltages which do not exceed 24 V
for R measurements and 3 V for R
E
but above 40 V is indicated as dangerous. The meter must not be connected to voltages ex-
ceeding 100 V.
The voltage on the mea-
surement points exceeds
U >24V! 24 V but is lower than
N
40 V. The measurement
is blocked.
U >40V!
The voltage on the
N
and a contin- measurement points
uous exceeds 40 V. The mea-
sonic signal surement is blocked.
Connect the meter to the measured wire.
2P
Run the measurement using START button.
measurements. The voltage is measured up to 100 V,
CONT
The value of the interfering
signal is too high. The result
NOISE!
may be distorted by additional
uncertainty.
R>19,99kΩ
R >19,99kΩ
Measurement range
E
R >19,9kΩ
exceeded.
S
R >19,9kΩ
H
ρ>999kΩm
Wire continuity measurement
In order to eliminate the influence of the resistance of the test leads
over the result of the measurement, its compensation (auto-zeroing)
has to be done.
Enabling auto-zeroing
Using button F1 enable AUTOZERO mode.
Short-circuit the test leads.
Press START.
Disabling auto-zeroing
Using button F1 enable AUTOZERO mode.
Separate the test leads.
Press START.
It is sufficient 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.
The uncertainty of the
electrode resistance
LIMIT! >30%. Uncertainties
calculated on the basis of
the measured values.
Excessive interfering
current, the measurement
I >max
error may exceed the
L
basic error.
Measurements
v1.00 | 22.05.2020
First steps
Turn on the meter
Select the method and connect
Configure
Obtain the result