COMBI521
EN - 86
6. Use the
,
keys and move the cursor to the “
Z>
<
”
position. Press the
GO/STOP
key on the instrument to
start the test. The result of the Z1(offset ) measurement is
shown on the display above the “
Z>
<
” symbol. If the
Z1(offset) value <10
, the “
OK
” outcome is shown on
the display and is automatically saved in the internal
buffer.
V %
15/10 – 18:04
V%
ZL-L
=
=
- - -
- - -
%
FREQ. = 50.00 Hz
VL-PE= 223V VL-L= 387V
OK
L-L 16A
4%
1.48
MODE Inom Lim.
Z>
<
7.
Connect the instrument to the final point of the mains being tested according to Fig.
36 or Fig. 37 in order to measure the
Z2
impedance at the end of the line. Note the
previously measured Z1 (Offset) value displayed.
8.
Use the
,
keys and move the cursor to any
position except “Z>
<
”. Press the
GO/STOP
key on the
instrument to measure the Z2 impedance and complete
the
V% voltage drop measurement. During this whole
stage, do not disconnect the measuring leads of the
instrument from the system being tested.
In case of positive result (
maximum percentage value
of calculated voltage drop according to § 12.11 < set
limit value)
, the “
OK
“ outcome and the screen to the side
are displayed by the instrument. The screen contains the
value of the
Z2
end-of-line impedance together with the
Z1 (Offset)
value.
V %
15/10 – 18:04
V%
ZL-L
=
=
0.4
1.57
%
FREQ. = 50.00 Hz
VL-PE= 223V VL-L= 387V
OK
L-L 16A
4%
1.48
MODE
Inom Lim. Z>
<
9. In case of negative result (
maximum percentage value
of calculated voltage drop according to § 12.11 > set
limit value)
, the “
NOT
OK
“ outcome and the screen to
the side are displayed by the instrument. The screen
contains the value of the
Z2
end-of-line impedance
together with the
Z1 (Offset)
value.
V %
15/10 – 18:04
V%
ZL-L
=
=
19.5
5.97
%
FREQ. = 50.00 Hz
VL-PE= 223V VL-L= 387V
NOT OK
L-L 16A
4%
1.48
MODE
Inom Lim. Z>
<
10. Press the
SAVE
key to store the test result in the instrument’s memory (see § 7.1) or
the
ESC/MENU
key to exit the screen without saving and go back to the main
measuring screen.
