Test Equipment Depot 88 Service Manual page 18

88
Service Manual
Common and Normal Mode Rejection Ratio
Function
F V
F mV
B V
Ω
Diode Test
7
* 10 V-Hz max.
MIN MAX Recording
Nominal Response
100 ms to 80%
1 sec
1-8
Overload Input
Protection* Impedance
(nominal)
300 V rms 10 MΩ, <100 pF
300 V rms 10 MΩ, <100 pF
300 V rms 10 MΩ, <100 pF
(ac-coupled)
Open Circuit
Test
Voltage
300 V rms <1.3 V dc
300V rms <3.9 V dc
Specified accuracy ± 12 digits for changes > 200 ms in duration
Same as specified accuracy for changes > 2 seconds in duration
Common Mode Rejection
Ratio (1 kΩ unbalance)
>120 dB at dc, 50 Hz, or 60 Hz
>120 dB at dc, 50 Hz, or 60 Hz
>60 dB, dc to 60 Hz
Full Scale Voltage
To 4.0 mΩ 40 MΩ or
nS
<450 mV dc <1.3V dc
3.000 V dc
Accuracy
Normal Mode
Rejection Ratio
>60 dB at 50 Hz or
60 Hz
>60dB at 50 Hz or
60 Hz
Short Circuit
Current
<500 µA
1.0 mA typical