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True-rms Digital Multimeters
Detailed Specifications
77
Input Characteristics
Function
Overload
Protection
[1]
Input Impedance
Common Mode
Rejection Ratio
(1 kΩ unbalance)
Normal Mode Rejection
L
1000 V
10 MΩ <100 pF
>120 dB at dc, 50 Hz or 60 Hz >60 dB at 50 Hz or 60 Hz
F
mV
1000 V
[2]
10 MΩ <100 pF
>120 dB at dc, 50 Hz or 60 Hz >60 dB at 50 Hz or 60 Hz
K
1000 V
10 MΩ <100 pF
(ac-coupled)
>60 dB, dc to 60 Hz
L
1000 V
3.2 kΩ <100 pF
(ac-coupled)
Not specified Not specified
Full Scale Voltage Typical Short Circuit Current
Function
Overload
Protection
[1]
Open Circuit
Test Voltage
To 500 kΩ
>5 or 50 nS
500 Ω 5 kΩ 50 kΩ 500 kΩ 5 MΩ 50 MΩ
e
1000 V
[2]
5 V dc 550 mV <5 V 1 mA
100 μA 10 μA
1 μA 0.3 μA 0.3 μA
50e 1000 V
[2]
20 V decreasing
to 2.5 V
500 mV 10 mA
G
1000 V
[2]
5 V dc 3.1 V dc 1 mA
[1] Input is limited to the product of a V rms sinewave times frequency of 2 x 10
7
V-Hz.
[2] For circuits <0.5 A short circuit. 660V for high energy circuits.
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