MI 2087 AL2 EasiTEST
Measurement instructions
24
Notes:
q
If RCD trips during contact voltage measurement (some fault or leakage
current is probably already flowing to ground), “
rcd
”
mark will start to blink.
q
Nominal differential current, set in this function, will be offered in other RCD
functions (contact voltage, trip-out time and auto RCD test)!
q
Limit contact voltage Ulim can be set in contact voltage function only!
q
For safety reason will trip-out current measurement be carried out only, if
contact voltage at nominal differential current is lower than set limit value!
q
Current, flowing to PE protective conductor, caused by faulty appliances or
capacitive connection between L and PE terminals, will influence on test result.
Disconnect such appliances before measurement is started!
q
Specified accuracy of tested parameters is valid only, if earthing system
connected to PE terminal is free of interfering voltages!
q
“
bat
” message, displayed during or after finishing the measurement means
batteries are too weak to guarantee correct result. Replace the batteries.
3.6 RCD - Automatic test
Purpose of the function is to carry out complete test of RCD and measurement of
belonging parameters (Contact Voltage, Fault loop resistance and Trip-out time at
different fault currents) in one set of automatic tests performed by the instrument. If
any false parameter is noticed during this automatic test, individual parameter test is
to be used for further investigation.
How to carry out the automatic test
Step 1
q
Connect test cable
(Universal test cable) to EasiTest.
q
Set function switch to
RCD AUTO
position,
Auto function initial menu
will be
displayed; see the figure below.
Fig. 16:
Auto function initial menu
G ........ Standard (
G
eneral) type of
RCD is selected.
S
is
displayed if Selective
type is selected.
