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Models 175, 177 & 179
Users Manual
14
Function Overload Protection
1
Input Impedance
(Nominal)
Common Mode Rejection Ratio
(1 kΩ Unbalanced) Normal Mode Rejection
Volts AC 1000 V RMS > 10 MΩ < 100 pF > 60 dB @ DC, 50 Hz or 60 Hz
Volts DC 1000 V RMS > 10 MΩ <100 pF >120 dB @ DC, 50 Hz or 60 Hz > 60 dB @ 50 Hz or 60 Hz
mV/
1000 V RMS
2
> 10 MΩ < 100 pF >120 dB @ DC, 50 Hz or 60 Hz > 60 dB @ 50 Hz or 60 Hz
Open Circuit Test
Voltage
Full Scale Voltage To:
600 kΩ 50 MΩ
Short Circuit Current
Ohms 1000 V RMS
2
< 8.0 V DC < 660 mV DC < 4.6 V DC < 1.1 mA
Continuity/Diode
test
1000 V RMS
2
< 8.0 V DC 2.4 V DC < 1.1 mA
1. 10
7
V-Hz maximum.
2. For circuits < 0.3 A short circuit. 660 V for high energy circuits.
Function Overload Protection Overload
mA Fused, 44/100 A, 1000 V FAST Fuse 600 mA overload for 2 minutes maximum
A Fused, 11 A, 1000 V FAST Fuse 20 A overload for 30 seconds maximum