Hioki SW1001, Instruction Manual, Page: 146 / 164

142
Accuracy Calculation Example
Example 2: Use of the device in combination with the BT4560
Used module SW9002
Instrument BT4560 RX function, 3 m
Ω
range, 1000 Hz, sampling SLOW
Measurement value R 1 m
Ω
, X 0 m
Ω
R measurement accuracy = BT4560 R measurement ac SW9002 measurement influence
(BT4560 3 m
Ω
range R)
= {±(0.004 |R| + 0.0052 |X|) ± 8 dgt.} + (±0.1% f.s.)
= {±(0.004 × 1 m
Ω
+ 0.0052 × 0 m
Ω
) ± 0.0008 m
Ω
} + {±(0.1% ×
3.0000 m
Ω
)}
= (±0.0048 m
Ω
) + (±0.0030 m
Ω
)
= ±0.0078 m
Ω
(total error)
X measurement accuracy = BT4560 X measurement ac SW9002 measurement influence
(BT4560 3 m
Ω
range X)
= {±(0.004 |X| + 0.0052 |R|) ± 8 dgt.} + (±1.0% f.s.)
= {±(0.004 × 0 m
Ω
+ 0.0052 × 1 m
Ω
) ± 0.0008 m
Ω
} + {±(1.0% ×
3.0000 m
Ω
)}
= (±0.0052 m
Ω
) + (±0.0300 m
Ω
)
= ±0.0352 m
Ω
(total error)
Example 3: Use of the device in combination with the DM7276
Used module SW9001
Instrument DM7276 V function, 100 mV range, sampling MEDIUM
Measurement value 100 mV
Voltage measurement accuracy = DM7276 voltage measurement ac SW9001
measurement influence (all DM7276 voltage ranges)
= (±0.0015% rdg. ± 2 µV) + (±7 µV)
= (±0.0015% × 100 mV ± 2 µV) + (±7 µV)
= (±0.0035 mV) + (±7 µV)
= ±0.0105 mV (total error)