IM 2769-10E
―
14
―
Also, the allowable error of
is changed according to the ratio of N/M.
This relationship is expressed by the graph as shown in Fig. 6.2.
For the m and n arms, there are provided no terminals such as corresponding to P
2S
.
The influence of the lead resistance
and
upon the m and n arms can be neglected
if the value of is determined sufficiently smaller than that of S.
1
0.5
1.0
0.1
0
2 3 4 5 6 7 8 9 10 11
0.5% error
N
(Ω)
Dial Scale
Lead Resistance
at Potential
Terminal
Fig. 6.2 Error due to Potential Lead
