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8-2 Measuring Ranges and Accuracies
Accuracy-guaranteed temperature/humidity ranges : 23 ±5 °C,
no more than 75 %RH (without condensation)
rdg : Reading. dgt : Lowest digit.
Interference voltage V (ACV)
Function
Measurement range
Accuracy
ACV
0.0 ~ 400.0 V
±(2.0 %rdg + 3 dgt)
Accuracy-guaranteed frequencies: 40~500 Hz sinewave, input
impedance approx. 2 MΩ
Earth resistance 40 Ω/400 Ω/4000 Ω
Resistance of auxiliary earth electrode: 100 Ω±5%, Interference
voltage:
0 V(Specific uncertainty A)
Function
Measurement range
Accuracy
40 Ω
0.00 ~ 10.00
±(2.0 %rdg + 10 dgt)
10.01 ~ 40.00 Ω
±(2.0 %rdg + 3 dgt)
400 Ω
0.0 ~ 400.0 Ω
4000 Ω
0 ~ 3000 Ω
3001 ~ 4000 Ω
Out of accuracy
guaranteed
Measuring frequency: 820 Hz
Measuring current at the short circuit: approx. 2 mA
Accuracy guaranteed: Resistance of Auxiliary earth electrode
below approx. 12 kΩ
Accuracy calculation method
Example) 400.0 Ω measurement
Displayed value : 100.0 Ω
Range and accuracy : ±(2.0 %rdg + 3 dgt) in 400.0 Ω range
Error : ±(400.0 Ω x 2.0 % + 3 dgt) = ±8.3 Ω
True value : 400.0 Ω ±8.3 Ω (391.7 to 408.3 Ω)
* In the 400.0 Ω range, the 3 dgt corresponds to 0.3 Ω.