MI 3155
Eurotest
XD
General description
11
Z loop, Zloop 4W, Zs rcd
The specified accuracy of tested parameters is valid only if the mains voltage is stable
during the measurement.
The measurement accuracy and immunity against noise are higher if
I test
parameter in
Zsrcd is set to ‘Standard’.
Fault loop impedance (Z loop) measurements will trip an RCD.
The Zs rcd measurement does not normally trip an RCD. However if a leakage current
from L to PE already flows or if a very sensitive RCD is installed (for example EV type)
the RCD could trip. In this case setting parameter
I test
to ‘Low’ can help.
Z line, Z line 4W, Voltage drop
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.
If the reference impedance is not set the value of Z
REF
is considered as 0.00 Ω.
The lowest value of Zref, measured at different settings of the
Test
or
Phase
parameters
is used for Voltage drop (ΔU) measurement in Voltage drop single test, Zauto single test,
auto tests and Auto Sequences
®.
Measuring Zref without test voltage present (disconnected test leads) will reset Zref value
to initial value.
Power, Harmonics, Currents
Consider polarity of current clamp (arrow on test clamp should be oriented toward
connected load), otherwise result will be negative!
Illumination
LUXmeter type B (A 1172) and LUXmeter type C (A 1173) probes are supported by the
instrument.
Artificial light sources reach full power of operation after a period of time (see technical
data for light sources) and should be therefore switched on for this period of time before
the measurements are taken.
For accurate measurement make sure that the milk glass bulb is lit without any shadows
cast by hand, body or other unwanted objects.
Refer to the Illuminance handbook for more information.
Rpe
The specified accuracy of tested parameters is valid only if the mains voltage is stable
during the measurement.
Measurement will trip an RCD if the parameter RCD is set to ‘No’.
The measurement does not normally trip an RCD if the
parameter RCD is set to ‘Yes’.
However, the RCD can trip if a leakage current from L to PE already flows.
IMD
It is recommended to disconnect all appliances from the tested supply to receive regular
test results. Any connected appliance will influence the insulation resistance threshold
test.
Z line mΩ, Z loop mΩ
A 1143 Euro Z 290 A adapter is required for this measurements.
