Hioki FT3151 - Page 113

49
Measuring Range and Tolerances
Effect
of earth
voltage (V
E
)
(E
4
)
50 Hz, 60 Hz 0 V < V
E
≤ 5 V Tolerance ×
1.0
5 V < V
E
≤ 10 V Tolerance ×
2.0
DC,16 2/3
(sixteen and
two-thirds) Hz,
400 Hz
0 V < V
E
≤ 3 V Tolerance ×
1.0
For measurement of a resistance of 1
Ω
using ×1
Ω
range while affected by an earth
voltage with a frequency of 400 Hz
Tolerance ×
5.0
Effect of
auxiliary
earth
resistance
(E
5
)
Exceeding 0
Ω
to (100 × R
A
) but less than or
equal to 5 k
Ω
By S-H check
Tolerance ×
1.0
R
A
: Total earth resistance value (between main ground
terminal and the earth)
Effect of
system
frequency
(E
6
)
N/A
Effect of
system
voltage (E
7
)
N/A
Effect of
external
magnetic
eld (E
8
)
In a magnetic eld of 400 A/m DC or AC with
a frequency of 50 Hz or 60 Hz
Tolerance ×
0.5
Operating
uncertainty
(B)
±17.8% f.s. at a maximum
1
2
3
4
5
6
7
Appx. Ind.