METREL MI 3122 User Manual

MI 3122 Smartec Z Line-Loop / RCD Warnings and notes
7
RCD functions
 Parameters set in one function are also kept for other RCD functions.
 The Contact voltage test will normally not trip-out RCD of tested installation.
However, the RCD trip-out may occur and Uc measurement is affected as a result
of existing PE leakage currents in the installation.
 RCD trip-out current and time will be measured only if the contact voltage - pretest
passed successfully.
 L and N test terminals are reversed automatically according to detected terminal
voltage (except in UK version).
 It can happen that the RCD trips-out during the safety pretests. Possible reasons for
trip-out are incorrect set RCD parameters (I
N
), existing leakage currents or
defective RCD.
Z-LOOP
 The Z-LOOP impedance function will trip-out the RCD in RCD protected installation
that is tested. Use the Zs rcd impedance function to prevent the trip-out.
 The Zs rcd impedance function takes longer time to complete but has much better
accuracy then R
L
sub-result in RCD: Uc function.
 Specified accuracy of tested parameters is valid only if mains voltage is stable
during the measurement.
 L and N test terminals are reversed automatically according to detected terminal
voltage (except in UK version).
Z-LINE
 In case of measurement of Z
Line-Line
with the instrument test leads PE and N
connected together the instrument will display a warning of dangerous PE voltage.
The measurement will be performed anyway.
 Specified accuracy of tested parameters is valid only if mains voltage is stable
during the measurement.
 L and N test terminals are reversed automatically according to detected terminal
voltage (except in UK version).

METREL MI 3122 Specifications

General

Brand	METREL
Model	MI 3122
Category	Multimeter
Language	English