Fluke Fluke 4325181 ユーザーズマニュアル
製品コード
4325181
1625-2
Users Manual
30
3. Press "START TEST"-button and note result of R
E
value.
4. Connect clip-on transformer. See Figure 9.
edw018.eps
Figure 9. Clip-on Transformer Connection
5. Turn central rotary switch to position " RE 3pole".
6. Press "START TEST" again.
If the measured value R
E
deviates from the R
E
value determined without clip-on
transformer by more than 5 %, adjust the clip-on transformation ratio (tr) correspondingly:
)
(
)
(
mer
onTransfor
p
withoutcli
R
mer
ontransfor
withclip
R
trold
trnew
E
E
−
−
×
=
Example:
Your clip-on transformer has a transformation ratio of tr = 1000:1. The measurement
without clip-on transformer results in a value R
without clip-on transformer results in a value R
E
= 0.983
Ω
. With a clip-on transformer a
value of R
E
= 1.175
Ω
is measured.
The deviation thus reads (1.175 - 0.983)
Ω
= + 0.192
Ω
and referring to R
E
= 0.983
Ω
an
error evolves as following:
%
5
.
19
983
.
0
192
.
0
%
100
+
=
Ω
Ω
×
The new transformation ratio to be set calculates:
1195
983
.
0
175
.
1
1000
=
×
=
trnew