Carrying Out Measurements; Loop Measurement - BEHA Unitest TELARIS SCHLEIFE Manual De Instrucciones

Carrying out Measurements

6.0 Carrying out Measurements
Prior to any measurement, test the instrument
for perfect functioning by using a functional
EUT. This could be a correctly wired socket of
which perfect functioni is known.
To obtain precise measurement results,
switch off all loads or disconnect them from
the mains.
An exact measurement may only be carried out
using the supplied test lead / mains lead. The
instrument has been calibrated with this cable.
If other cables are employed, the measure-
ment accuracy can no longer be guaranteed.
If several measurements are carried out during
a short period the temperature monitor is trig-
gered. After a short cooling-down period, the
measurements may be resumed.
For resistance measurements in compliance
with 6.1, 6.2 and 6.3, the ground conductor
must not be live in order to comply with the re-
spective specifications.
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6.1 Loop Impedance Measurement /
Short-Circuit Current Measurement
Connect the mains lead to the mains connec-
tor (13).
Select the measurement function ZL/IPSC
via the function switch (17).
Connect the test cables / mains plug to UUT
/ socket by respecting correct polarity
Set a voltage contact limit using the key (15)
of the screen.
The socket is continuously monitored for per-
fect function. If the symbol (6) "Reverse mains
plug" is displayed, the plug has to be turned or
the connection N and L of the three-pole test
lead have to be reversed. If the symbol "Socket
Error" (5) is displayed, an internal mains error
exists. If the voltage between N and PE exceeds
the selected (50V/25V), "UB>UL" (3) is dis-
played.
For a complete socket test the contact elec-
trode (16) must be touched, and the LC-dis-
play must be watched. If the symbol "socket
error"(5) is displayed a PE error exists.
Press key "Start" (18)
Wait for approx. 5 seconds, during this the
display shows "-"
Read the measurement result on display.
By pressing the key "Display" (23) you may
now select the different measurement va-
lues.
If the RL conductor resistance exceeds 19.99
Ω, the measurement is interrupted and the
message "Attention (1) + Limit (2) + RL" is dis-
played.