PAT-806-IT
– USER MANUAL
31
4.4.4 Four-wire measurement of protective lead resistance using 10/25 A
current
Connect one probe (or crocodile clip) connected to
I1
,
U1
sockets, to PE of
power cable of the tested device. Use the power probe (or Kelvin crocodile
clip) connected to
U2
and
I2
sockets and touch metal parts of the tested de-
vice connected to PE.
The method of measurement and observations are the same as for the measurement of 200 mA.
4.5 Measurement of insulation resistance
Press
R
ISO
. After that meter is prepared for
measurement.
Further pressing of
R
ISO
results in
switching from standard R
ISO
measurement to a three-point
measurement on welding equip-
ment.
When parameters must be changed press
SET
.
Setting is performed as in section 4.2 (lower limit is
set). For the standard measurement the following
parameters are set: U
ISO
voltage, the lower limit
value and measurement time. For the triple meas-
urement U
ISO
voltage is set for all three measure-
ments as well as limits and measurement times for
each measurement.
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