COMBITEST422
EN - 28
6.4. LO
: CONTINUITY OF PROTECTIVE CONDUCTORS WITH 10A
This function allows measuring the resistance of protective and equipotential conductors
with a test current >10A by using the Lo
10A optional accessory EQUITEST connected
to the instrument through the C2050 cable. The optional accessory EQUITEST must be
directly powered by the mains on which measurements are performed. For detailed
information, please refer to the user manual of this EQUITEST accessory.
CAUTION
•
The instrument can be used for measurements on installations with
overvoltage category CAT IV 300V to earth and max 415V between
inputs.
•
We recommend holding the alligator clip respecting the safety area
created by the hand protection (see § 4.2).
•
Check that no voltage is present at the ends of the item to be tested
before carrying out a continuity test.
The results may be influenced by the presence of auxiliary circuits
connected in parallel with the item to be tested or by transient currents.
•
Continuity test is carried out by supplying a current
higher than 10A
in
case the resistance does not exceed ca. 0.7
(including resistance of
the test cables).
The 4-wire method allows extending the test leads
without any preliminary calibration.
1. Press the
MENU
key, move the cursor to
Lo
in the main
menu by means of the arrow keys (
,
) and confirm
with
ENTER
. Subsequently, the instrument displays a
screen similar to the one reported here to the side.
L o
15/10
– 18:04
R
I t e s t
=
=
- - -
- - - A
0.500
Lim.
INFO
2. Use
the
,
keys
to
modify
the
parameter
value.
Lim
→
this virtual key allows the selection of the maximum limit to consider the
measured value correct. It is possible to set a limit included in the range:
0.003
÷
0.500
in steps of 0.001
3. Connect the EQUITEST accessory to the mains
(230/240V
– 50/60Hz) and check that the green LED
lights up. Connect the accessory to the instrument
through the C2050 cable. Subsequently, the
“Conn.”
message is shown indicating the correct detection by the
instrument.
L o
15/10
– 18:04
R
I t e s t
=
=
- - -
- - - A
0.500
Conn.
Lim.
INFO
4. Use the
,
keys to select the “INFO” item. The screen
L o
15/10
– 18:04
Kommenterede [S15]:
forse rete, ovvero mains?
