Maximum Voltage And Current Inputs; Dc And Ac Voltage; Dc And Ac Current; Resistance And Temperature - Fluke 8508A User Manual

8508A
Users Manual

Maximum Voltage and Current Inputs

Notes to maximum voltage and current input specifications
• Maximum DC input equal to maximum rms input. Maximum peak input is rms x 1.414
•
Specifications apply equally to front and rear input terminals except where noted below.
•
Front to rear isolation allows opposing polarity of maximum terminal voltage on each input.
• Digital I/O Ground (DigGnd) is internally connected to Safety Ground (Ground).
• Maximum Common Mode voltage with respect to Safety Ground is 1.7 x 10

DC and AC Voltage

Ground
Notes
•
The A terminal is open circuit in these functions.
•
In 4wV mode Sense Hi is internally connected to Hi and Sense Lo is internally connected to Lo.

DC and AC Current

Ground
Notes
•
The Sense Lo, Sense Hi, and Hi Terminals are open circuit in these functions.
• The front input A terminal protection is automatic and self-resetting, and does not interrupt current flow. Damage is likely to
occur if more than 20 A is applied.
•
The rear input A terminal is protected by a fuse mounted on the rear panel.

Resistance and Temperature

Ground
Note
•
The A terminal is open circuit in these functions.
5-4
Maximum rms terminal voltages
Guard
DigGnd 650 V
0 V 650 V
Maximum rms terminal voltages
Guard
DigGnd 650 V
0 V 650 V
Maximum rms terminal currents
Guard
Front Input n.a
Rear input n.a
Maximum rms terminal voltages
Guard
DigGnd 650 V
0 V 650 V
Lo
A 1000 V
1000 V 250 V
650 V 650 V
650 V 650 V
Lo
A 5 V
250 V 250 V
650 V 650 V
650 V 650 V
A Lo
20 A 20 A
2 A 2 A
Lo
A 250 V
250 V 250 V
650 V 650 V
650 V 650 V
5
VHz.
Hi
Sense Lo 1000 V
250 V 1000 V
1000 V 1000 V
250 V 1000 V
650 V 1000 V
650 V 1000 V
Hi
Sense Lo 1000 V
250 V 1000 V
250 V 1000 V
250 V 1000 V
650 V 1000 V
650 V 1000 V
Sense Lo Hi
n.a n.a
n.a n.a
Hi
Sense Lo 250 V
250 V 250 V
250 V 250 V
250 V 250 V
650 V 1000 V
650 V 1000 V
Sense Hi
250 V
1000 V
1000 V
1000 V
1000 V
1000 V
1000 V
Sense Hi
250 V
1000 V
1000 V
1000 V
1000 V
1000 V
1000 V
Sense Hi
n.a
n.a
Sense Hi
250 V
250 V
250 V
250 V
250 V
1000 V
1000 V