Fluke Fluke 4325162 Benutzerhandbuch

30 

3.  Press "START TEST"-button and note result of R

E

 value.  

4.  Connect clip-on transformer. See Figure 9. 

 

edw018.eps 

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: 

)

(

)

(

−

−

×

=

 

Example: 

Your clip-on transformer has a transformation ratio of tr = 1000:1. The measurement 
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

=

×

=