Fluke A B C D E F G H I, Operating Notes, Turning on the 5725A Amplifier, CALIBRATION Switch

Operating Notes 3

Turning on the 5725A Amplifier

A

B

C

D

E

F

G

H

I

Table 3-2. Rear Panel Features

CURRENT OUTPUT Binding Posts

The source of all amplified current if the 5725A is configured for rear output. You can set the 5700A to source all its unamplified as well as amplified current through these binding posts. The LO binding post is isolated from ground when in the current function, and is open-circuited at other times. Cable and connection recommendations are made in Section 4 of the 5700A Operator Manual.

CALIBRATION Switch

A slide switch that enables and disables writing to the nonvolatile memory that stores 5725A calibration constants. Switching to ENABLE allows writing to the memory, and switching to NORMAL protects data in memory from being overwritten. The switch must be in the ENABLE position to store corrections generated during calibration. The switch is recessed to allow a metrologist to cover it with a calibration seal to guarantee calibrator integrity.

5700A CALIBRATOR Connector

Provides the analog and digital interface to the 5700A Calibrator. After connecting to the 5700A, you control the 5725A from the 5700A front panel or by sending remote commands to the 5700A. Refer to "Using an Auxiliary Amplifier" in Section 4, or for remote operation to Section 5, of the 5700A Operator Manual for details.

Fan Filter

Covers the air intake to keep dust and debris out of the instrument. The fan directs a constant cooling air flow throughout the chassis.

Line Voltage/Fuse Rating Label

Shows the various settings of the line voltage switches, and the correct replacement fuse for operating voltages of 110 (90 to 132) and 220 (180 to 264) volts ac. Refer to "Accessing the Fuse" in Section 2 for the fuse replacement procedure.

Line Voltage Selection Switches

Select the operating line voltage. Refer to "Selecting Line Voltage" in Section 2 for instructions on how to select operating line voltage.

Fuse Holder

The line power fuse. Refer to "Accessing the Fuse" in Section 2 for fuse rating information and the fuse replacement procedure.

CHASSIS GROUND Connector

If the 5725A is the location of the ground reference point in a system, the CHASSIS GROUND binding post can be used for connecting other instruments to earth ground. (The chassis is connected to earth ground through the three-conductor line cord.)

Line Power Input

A grounded male three-prong connector that accepts the line power cord.

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