Fluke 77 Series IV, User Manual

Page: 21 / 22

Digital Multimeter
General Specifications
17
Function Overload Protection
[1]
Input Impedance
(Nominal)
Common Mode Rejection Ratio
(1 k
Ω
Unbalanced)
Normal Mode Rejection
Volts AC 1000 V >10 M
Ω
<100 pF >60 dB @ dc, 50 Hz or 60 Hz
Volts DC 1000 V >10 M
Ω
<100 pF >120 dB @ dc, 50 Hz or 60 Hz >60 dB @ 50 Hz or 60 Hz
mV 1000 V
[2]
>10 M
Ω
<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:
6.0 M
Ω
50 M
Ω
Short Circuit Current
Ohms/Capacitance 1000 V
[2]
<8.0 V dc <660 mV dc <4.6 V dc <1.1 mA
Continuity/Diode test 1000 V
[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, 440 mA, 1000 V FAST Fuse
600 mA overload for 2 minutes maximum, 10
minutes rest.
A Fused, 11 A, 1000 V FAST Fuse
20 A overload for 30 seconds maximum, 10
minutes rest.