GMC-I Gossen-Metrawatt GmbH
23
GB
Current Clip Setup Menu:
SEt
↵
V
CLIP
↵
oFF
V
1000
V
10000
↵
.
If a transformation ratio has been selected in the menu,
and if the selector switch has been set for current or power
measurement (range: mA AC or A AC), the current clip
symbol appears at the display.
Attention!
!
If current transformers are used at the secondary
side in an open condition, e.g. due to defective or
non-connected power cables, a blown device fuse
or incorrect connection, dangerously high voltages
can occur at the terminals. For this reason, check to
see if the measuring instrument’s current path and
transformer’s secondary winding, which is con-
nected to the instrument, complete a closed current
circuit, and connect the transformer to the
⊥
and
mA or A jacks.
Note!
☞
After
measurement with the current clip has been com-
pleted, “oFF”
should be selected in the setup menu.
Incorrect measurement values will otherwise result
in the mA/A AC range, because the transformation
ratio is still being taken into consideration.
The maximum allowable operating voltage is equal to the
rated voltage of the current transformer. When reading the
measurement value, also consider the additional display error.
9.1.2
Transformer Output V for AC and DC Measurements
Some transformers have a voltage output (designation:
mV/A). Consequently, the secondary terminal must be
connected to
⊥
and V, and the instrument switched to volt-
age measurement.
The adjusted transformer factor „CLIP“ is disregarded in
this case.
Note:
Transformers with voltage output cannot be used for
power measurement with the METRA HIT 29S !
A
mA
10A
300mA
V
F
°
C
~
~
…
300 mA
(
…
10 A)