Fluke 5700A Series II - Page 80

5700A/5720A Series II
Operators Manual
3-10
Table 3-1. Front Panel Features (continued)
a
WIDEBAND Connector
A Type "N" connector that provides a connection point for output from the
Option 5700A-03 Wideband AC Module. Wideband output specifications are
stated for output levels present at the end of its 3-foot 50Ω coaxial cable
terminated into a 50Ω purely resistive load. The connector shell is connected
to chassis ground. Refer to Chapter 4 for connecting and operating
instructions for the wideband module.
b
GND Binding Post
If the calibrator is the location of the ground reference point in a system, the
GND binding post can be used for connecting other instruments to earth
ground. (The chassis is normally connected to earth ground through the
three-conductor line cord instead of through the earth ground binding post.)
Refer to "Cable Connections" in Chapter 4 for details. Included with the
calibrator is a brass strap that connects GND to V GUARD.
c
V GUARD Binding Post
Provides an external connection point for the internal voltage guard. For a
UUT with floating (ungrounded) inputs, the V GUARD should be connected
to LO internally (
x off). For a UUT with a grounded input, the V GUARD
must be externally connected to the grounded UUT input (x on). The
maximum allowable potential between the V GUARD connector and chassis
ground is 20V peak. Refer to "When to use External Voltage Guard" and
"Cable Connections" in Chapter 4 for details.
d
SENSE Binding Posts
Used in the resistance and voltage functions for sensing at the UUT after
you have selected external sense by pressing
X or by remote command.
External Sensing should be used in the dc voltage function when the UUT
draws enough current to produce a significant voltage drop in the cables,
and in the resistance function when the UUT has a four-wire ohms input and
the calibrator is set to 100 kΩ or less. External sensing can also be used in
the two-wire ohms function to allow the two-wire compensation circuitry to
the UUT terminals. Refer to Refer to "When to use External Sensing," "Four-
Wire vs. Two-Wire Resistance Connections," and "Cable Connections" in
Chapter 4 for external sensing instructions and illustrations of SENSE
connections.
e
OUTPUT Binding Posts
Provide connection points for ac and dc current and voltage output, as well
as resistance. The function of each OUTPUT binding post is defined below:
LO
The common binding post for all output functions including 5725A amplified
voltage output, but not Option 5700A-03 Wideband AC or other auxiliary
amplifier output.
HI
The active binding post for all output functions including 5725A amplified
voltage output, but not Option 5700A-03 Wideband AC or other auxiliary
amplifier output.
AUX CURRENT OUTPUT
An optional active binding post for current. It is convenient to use the AUX
CURRENT OUTPUT binding post when calibrating a UUT with a separate
current input terminal. Refer to "Connecting the calibrator to the UUT" in
Chapter 4 for instructions for using this binding post.