Hioki DM7275 Series - Page 156

156
Measurement Specications
Linearity:
Linearity is already included in the voltage measurement accuracy and need
not be added again.
|Vin| ≤ 300 V: 0.0001% rdg. + 0.0001% f.s.
|Vin| > 300 V: 0.0001% rdg. + 0.0001% f.s. + voltage coefcient error
Temperature measurement
accuracy
Accuracyspecications Accuracy
Instrument accuracy -10.0°C to 60.0°C ±0.2°C
Combined accuracy with
Z2001
-10.0°C to 4.9°C ±0.7°C
5.0°C to 35.0°C ±0.5°C
35.1°C to 50.0°C ±0.7°C
50.1°C to 60.0°C ±0.9°C
Separatetable1(DM7275)
Range Maximumdisplay*
Maximum
resolution
Measurementaccuracy
Input resistance
AUTO
10M
Ω
100 mV ±120.000 00 mV 10 nV ±0.0030% rdg. ±2 µV >10 G
Ω
10 M
Ω
±1%
1000 mV ±1200.000 0 mV 100 nV ±0.0020% rdg. ±3 µV >10 G
Ω
10 M
Ω
±1%
10 V ±12.000 000 V 1 µV ±0.0020% rdg. ±12 µV >10 G
Ω
10 M
Ω
±1%
100 V ±120.000 00 V 10 µV ±0.0030% rdg. ±0.8 mV 10 M
Ω
±1% 10 M
Ω
±1%
1000 V ±1010.000 0 V 100 µV ±0.0035% rdg. ±2 mV 10 M
Ω
±1% 10 M
Ω
±1%
*Maximum input voltage: 1000 V peak
Separatetable2(DM7276)
Range Maximumdisplay*
Maximum
resolution
Measurementaccuracy
Input resistance
AUTO
10M
Ω
100 mV ±120.000 00 mV 10 nV ±0.0015% rdg. ±2 µV >10 G
Ω
10 M
Ω
±1%
1000 mV ±1200.000 0 mV 100 nV ±0.0011% rdg. ±3 µV >10 G
Ω
10 M
Ω
±1%
10 V ±12.000 000 V 1 µV ±0.0009% rdg. ±12 µV >10 G
Ω
10 M
Ω
±1%
100 V ±120.000 00 V 10 µV ±0.0020% rdg. ±0.8 mV 10 M
Ω
±1% 10 M
Ω
±1%
1000 V ±1010.000 0 V 100 µV ±0.0025% rdg. ±2 mV 10 M
Ω
±1% 10 M
Ω
±1%
*Maximum input voltage: 1000 V peak
Examplecalculationofvoltagemeasurementaccuracy
Instrument: DM7276
Display value: 500 V
Measurement conditions: 1000 V range, integration time of 1 PLC, L9207-10 Test Lead
From Separate Table 2 (1000 V range) 0.0025% × 500 V + 2 mV = 14.5 mV
Voltmeter coefcient error (see previous page) 0.0005% × (500 V / 1000 V)
2
×
500 V = 0.625 mV
Noise error (see previous page) 0.0001% × 1000 V + 0.5
µ
V = 1.0005 mV
Measurement cable error (see previous page) 10
µ
V
Total error 14.5 mV + 0.625 mV + 1.0005 mV + 10
µ
V = 16.1355 mV
After truncating digits that exceed the instrument’s display digits, 16.1 mV
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