Sonel MRU-30, Руководство пользователя, Страница: 13 / 56

MRU-30
– USER MANUAL
11
After the measurement
completes view the results
on the screen.
The result is displayed for 20 seconds. Press ENTER to display again.
Additional information displayed by the meter
V
N
>100V , >100V and
a continuous tone

,
‘ NOISE!’
and
The voltage on the measurement terminals is > 100 V.
The measurement cannot proceed.
V
N
xxV , >40V and a
continuous tone

,
‘ NOISE!’
and
Where xx is the value of the interfering voltage. The volt-
age on the measurement terminals is > 40 V. The meas-
urement cannot proceed.
V
N
xxV , >24V ,
‘ NOISE!’
and
Where xx is the value of the interfering voltage. The volt-
age on the measurement terminals is > 24 V, but < 40 V.
The measurement cannot proceed.
‘ NOISE!’
The value of the interfering voltage is < 24 V, but has a
high value. Results may be affected by additional uncer-
tainty.
4.3 Earth resistance measurement with 3-pole method (R
E
3P)
The basic type of earth ground resistance measurement is the 3-pole measurement.
Disconnect the earth electrode object of test.