Auxiliary Amplifiers; 5725A Amplifier - Fluke 5730A Getting Started Manual

5730A
Getting Started Manual

Auxiliary Amplifiers

The Fluke Calibration Model 5725A and 52120A amplifiers are available to extend the
high voltage performance and current range of the 5730A Calibrator.
Interface connectors on the Calibrator rear panel accept cables to directly operate a
5725A and/or 52120A. Multiple amplifiers can be connected to the Calibrator at the same
time, but only one output can be active at a time. Once the amplifiers are connected and
configured in the Product Setup Menu, amplifier operation is controlled by the Calibrator.
A maximum of three 52120As can be connected to provide a maximum of 360 A rms ac
or 300 A dc current when their outputs are connected in parallel.
See Chapter 4 of the Operators Manual for instructions to operate both amplifiers. The
general specifications at the end of this manual include specifications to operate the
5730A Calibrator with both amplifiers. For other amplifier specifications, refer to their
instruction manuals. Table 2 summarizes the extended capabilities offered by the 5725A
and 52120A. Brief descriptions of the extended capabilities follow.
Model

5725A Amplifier

52120A
Transconductance
[1]
Amplifier
[1] Up to three 52120As may be connected, providing a total current of up to 300 A dc or 360 A rms.
5725A Amplifier
The Fluke Calibration 5725A Amplifier is an external unit that operates under calibrator
control. It extends ac voltage drive capabilities and both ac and dc current output range.
The amplifier adds these capabilities to the 1100 V ac range of the 5730A Calibrator with
no compromise in accuracy:
•
•
•
A separate set of binding posts on the front panel of the 5725A supplies extended-range
ac and dc current outputs. Since most meters have a separate input terminal for the high-
current ranges, this eliminates the need to change cables during a procedure. The 5725A
can also be configured to source all current (both standard calibrator-generated current
and its own current) through the 5725A binding posts.
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Table 2. Auxiliary Amplifier Data
Mode
AC Volts
Amps
DC
Amps
AC
Amps
DC
Amps
AC
Frequency limits at higher voltage increase to 100 kHz at 750 V, 30 kHz at 1100 V.
Load limit increases to 70 mA for frequencies above 5 kHz.
Capacitive drive increases to 1000 pF, subject to the maximum output current.
Range
20 V rms to 1100 V rms up to 70 mA, 40 Hz to
30 kHz (50 mA < 5 kHz)
220 V rms to 750 V rms up to 70 mA, 30 kHz to
100 kHz
0 A to ±11 A
1 A rms to 11 A rms, 40 Hz to 10 kHz
0 A to ±100 A
0.2 A rms to 120 A rms, 10 Hz to 10 kHz