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156
Measurement Specifications
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 coefficient error
Temperature measurement
accuracy
Accuracy specifications
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
coefficient 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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