Fluke III Series Calibration Information Manual page 5

7x, 2x Series III
Calibration Information
Function
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Table 1. Specifications (cont.)
Common Mode Rejection Ratio (1 kΩ
Unbalanced)
>120 dB at dc, 50 Hz, or 60 Hz
>60 dB dc to 60 Hz
Open Circuit Test Voltage
<3.1 V dc
<2.8 V dc (typical)
<3.1 V dc
70/73/21/75:
400 µA
500 µA
V
F
0.0 V
0.6 V
1.2 V
2.0 V
Input Impedance (Nominal)
>10 MΩ, <50 pF
>60 dB at 50 Hz or 60 Hz
To 3.2 MΩ
<440 mV dc
<420 mV dc (typical)
Typical Short Circuit Current
70/73/21/75:
0.5 mA
0.4 mA
0.3 mA
0.1 mA
Normal Mode Rejection
Full Scale Voltage
32 MΩ
<1.4 V dc
<1.3 V dc (typical)
2.0 V dc
77/23:
300 µA
400 µA
Typical Test Current
23/77:
0.4 mA
0.3 mA
0.2 mA
0.1 mA