Fluke 5725A Getting Started

5725A

Amplifier

Getting Started

®

PN 1780175
June 2002

© 2002 Fluke Corporation. All rights reserved. Printed in USA
All product names are trademarks of their respective companies.

LIMITED WARRANTY AND LIMITATION OF LIABILITY

Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is one year
and begins on the date of shipment. Parts, product repairs, and services are warranted for 90 days. This warranty extends only to the original buyer or
end-user customer of a Fluke authorized reseller, and does not apply to fuses, disposable batteries, or to any product which, in Fluke’s opinion, has
been misused, altered, neglected, contaminated, or damaged by accident or abnormal conditions of operation or handling. Fluke warrants that soft­ware will operate substantially in accordance with its functional specifications for 90 days and that it has been properly recorded on non-defective
media. Fluke does not warrant that software will be error free or operate without interruption.

Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers only but have no authority to extend a
greater or different warranty on behalf of Fluke. Warranty support is available only if product is purchased through a Fluke authorized sales outlet or
Buyer has paid the applicable international price. Fluke reserves the right to invoice Buyer for importation costs of repair/replacement parts when
product purchased in one country is submitted for repair in another country.

Fluke’s warranty obligation is limited, at Fluke’s option, to refund of the purchase price, free of charge repair, or replacement of a defective product
which is returned to a Fluke authorized service center within the warranty period.

To obtain warranty service, contact your nearest Fluke authorized service center to obtain return authorization information, then send the product to
that service center, with a description of the difficulty, postage and insurance prepaid (FOB Destination). Fluke assumes no risk for damage in transit.
Following warranty repair, the product will be returned to Buyer, transportation prepaid (FOB Destination). If Fluke determines that failure was caused
by neglect, misuse, contamination, alteration, accident, or abnormal condition of operation or handling, including overvoltage failures caused by use

outside the product’s specified rating, or normal wear and tear of mechanical components, Fluke will provide an estimate of repair cost s and obtain
authorization before commencing the work. Following repair, the product will be returned to the Buyer transportation prepaid and the Buyer will be
billed for the repair and return transportation charges (FOB Shipping Point).

THIS WARRANTY IS BUYER'S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, IN­CLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILI TY OR FITNE SS FOR A PARTICUL A R PURPOSE. FL UKE
SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF
DATA, ARISING FROM ANY CAUSE OR THEORY.

Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or limitation of incidental or consequential dam­ages, the limitations and exclusions of this warranty may not apply to every buyer. If any provision of this Warranty is held invalid or unenforceable by
a court or other decision-maker of competent jurisdiction, such holding will not affect the validity or enforceability of any other provision.

Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.

Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands

11/99
To register your product online, visit register.fluke.com

Interference Information

This equipment generates and uses radio frequency energy and if not installed and used in strict accordance

with the manufacturer’s instructions, may cause interference to radio and television reception. It has been type
tested and found to comply with the limits for a Class B computing device in accordance with the specifications
of Part 15 of FCC Rules, which are designed to provide reasonable protection against such interference in a
residential installation.

Operation is subject to the following two conditions:

This device may not cause harmful interference.

•

This device must accept any interference received, including interference that may cause undesired opera-

•

tion.

There is no guarantee that interference will not occur in a particular installation. If this equipment does cause
interference to radio or television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one of more of the following measures:

Reorient the receiving antenna

•

Relocate the equipment with respect to the receiver

•

Move the equipment away from the receiver

•

Plug the equipment into a different outlet so that the computer and receiver are on different branch circuits

•

If necessary, the user should consult the dealer or an experienced radio/television technician for additional sug­gestions. The user may find the following booklet prepared by the Federal Communications Commission helpful:
How to Identify and Resolve Radio-TV Interference Problems. This booklet is available from the U.S. Govern­ment Printing Office, Washing ton, D.C. 20402. Stock No. 004-000-00345-4.

Declaration of the Manufacturer or Importer

We hereby certify that the Fluke Model 5725A Amplifier is in compliance with BMPT Vfg 243/1991 and is RFI
suppressed. The normal operation of some equipment (e.g. signal generators) may be subject to specific re­strictions. Please observe the notices in the users manual. The marketing and sales of the equipment was re­ported to the Central Office for Telecommunication Permits (BZT). The right to retest this equipment to verify
compliance with the regulation was given to the BZT.

Bescheinigung des Herstellers/Importeurs

Hiermit wird beschein igt, daβ Fluke Models 5725A Amplifier in Übereinstimung mit den Bestimmungen der

BMPT-AmtsblVfg 243/1991 funk-entstört ist. Der vorschriftsmäßige Betrieb mancher Geräte (z.B. Meßsender)
kann allerdings gewissen Einschränkungen unterliegen. Beachten Sie deshalb die Hinweise in der Bedienung­sanleitung. Dem Bundesamt für Zulassungen in der Telekcommunikation wurde das Inverkehrbringen dieses
Gerätes angezeigt und die Berechtigung zur Überprüfung der Seire auf Einhaltung der Bestimmungen
eingeräumt.

Fluke Corporation

OPERATOR SAFETY SUMMARY

WARNING

HIGH VOLTAGE

is used in the operation of this equip men t

LETHAL VOLTAGE

may be present on the terminals, observe all safety precautions!

To avoid electrical shock hazard, the operator should not electrically contact the output hi or sense hi bind­ing posts. During operation, lethal voltages of up to 1100V ac or dc may be present on these terminals.

Whenever the nature of the operation permits, keep one hand away from equipment to reduce the hazard of
current flowing thought vital organs of the body.

Terms in this Manual

This instrument has been design ed and teste d in acc ordanc e with I EC Pub licati on 348, Safet y Requ ireme nts for
Electronic Measuring Apparatus. This man ual contains infor mation and warnings which have to be follow ed by
the user to ensure safe operation and to retain the instrument in safe condition.

WWarning statements identify conditions or practices that could result in personal injury or loss of life.
WCaution statements identify conditions or practices that cou ld result in damage to the equ ipment or

other property.

Symbols Marked on Equipment

DANGER — High Voltage

Protective ground (earth) terminal

Attention — refer to the manual. This symbol indicates that information about the usage of a feature is contained in
the manual.

Power Source

The 5725A is intended to operate from a power source that will not apply more than 264V ac rms between the supply con­ductors or between either supply conductor and ground. A protective ground connection by way of the grounding conductor
in the power cord is essential for safe operation.

Use the Proper Fuse

To avoid fire hazard, use only the fuse specified on the line voltage selection switch label, and which is identical in type volt­age rating, and current rating.

Grounding the 5725A

The 5725A is Safety Class I (grounded enclosure) instruments as defined in IEC 348. The enclosure is grounded through the
grounding conductor of the power cord. To avoid electrical shock, plug the power cord into a properly wired earth grounded
receptacle before connecting anything to any of the 5725A or 5700A terminals. A protective ground connection by way of the
grounding conductor in the power cord is essential for safe operation.

Use the Proper Power Cord

Use only the power cord and connector appropriate for proper operation of a 5725A in your country.
Use only a power cord that is in good condition.
Refer cord and connector changes to qualified service personnel.

Do Not Operate in Explosive Atmospheres

To avoid explosion, do not operate the 5725A in an atmosphere of explosive gas.

Do Not Remove Cover

To avoid personal injury or death, do not remove the 5725A cover. Do not operate the 5725A without the cover properly in­stalled. There are no user-serviceable parts inside the 5725A, so there is no need for the operator to ever remove the cover.

Do Not Attempt to Operate if Protection May be Impaired

If the 5725A appears damaged or operates abnormally, protection may be impaired. Do not attempt to operate it. When is
doubt, have the instrument serviced.

SERVICING SAFETY SUMMARY

FOR QUALIFIED SERVICE PERSONNEL ONLY

Also refer to the preceding Operator Safety Summary

Do Not Service Alone

Do not perform internal service or adjustment of this product unless another person capable of rendering first aid and
resuscitation is present.

Use Care When Servicing With Power On

Dangerous voltage exist at many points inside this product. To avoid personal injury, do not touch exposed connec­tions and components while power is on.

Whenever the nature of the operation permits, keep one hand away from equipment to reduce the hazard of current
flowing through vital organs of the body.

Do not wear a grounded wrist strap while working on this product. A grounded wrist strap increase the risk of current
flowing through the body.

Disconnect power before removing protective panels, soldering, or replacing components.
High voltage may still be present even after disconnecting power.

FIRST AID FOR ELECTRIC SHOCK

Free the Victim From the Live Conductor

Shut off high voltage at once and ground the circuit. If hi gh voltage cannot be turned off quickly, ground the circui t.
If the circuit cannot be broken or grounded, use a board, dry clothing, or other nonconductor to f ree the victim.

Get Help!

Yell for help. Call an emergency number. Request medical assistance.

Never Accept Ordinary and General Tests for Death

Symptoms of electric shock may include unconsciousness, failur e to breathe, absence of pulse, pallor, and stif fness, and well as
severe burns.

Treat the Victim

If the victim is not breathing, begin CP R or mouth-to-mouth resuscitatio n if you are certified.

Table of Contents

Title Page

Introduction....................................................................................................................1

Contacting Fluke ........................................................................................................... 2

Where to Go From Here................................................................................................ 2

How to Use the Manuals............................................................................................... 4

5725A Getting Started Manual................................................................................. 4

5725A Instruction Manual ......................................................................................... 4

5700A/5720A Series II Manual Set........................................................................... 4

5700A/5720A Series II Operator Manual.................................................................. 4

5700A/5720A Series II Operator Reference Guide................................................... 5

5700A/5720A Series II Remote Programming Reference Guide.............................. 5

5700A/5720A Series II Service Manual.................................................................... 5

General Specifications................................................................................................... 6

Unpacking and Inspection............................................................................................. 8

Service Information ....................................................................................................... 11

Placement and Rack Mounting...................................................................................... 11

Cooling Considerations................................................................................................. 12

Connecting to the 5700A Calibrator.............................................................................. 12

i

5725A

Getting Started

Selecting Line Voltage................................................................................................... 14

Accessing the Fuse........................................................................................................ 16

Connecting to Line Power.............................................................................................. 18

Front-Panel Features..................................................................................................... 18

Rear-Panel Features...................................................................................................... 22

Turning on the 5725A Amplifier...................................................................................... 25

Warm Up........................................................................................................................ 25

ii

List of Tables

Table Title Page

1. Standard Equipment............................................................................................................. 8

2. Line Power Cord Types Available from Fluke....................................................................... 9

3. Front-Panel Features............................................................................................................ 20

4. Rear-Panel Features............................................................................................................ 23

iii

5725A

Getting Started

iv

List of Figures

Figure Title Page

1. 5700A Dimensions ............................................................................................................... 7

2. Line Power Cords Available for Fluke Instruments............................................................... 10

3. Correct Way to Dress Interface Cable.................................................................................. 13

4. Line Power Label and Switch Location................................................................................. 15

5. Accessing the Fuse.............................................................................................................. 17

6. Front-Panel Features............................................................................................................ 19

7. Rear-Panel Features............................................................................................................ 22

v

5725A

Getting Started

vi

Getting Started

Introduction

The Fluke 5725A Amplifier enhances the 5700A
Calibrator in the ac voltage, ac current, and dc current
functions. The 5725A operates under complete control of
the 5700A through an interface cable supplied with the
5725A.

Figure 1 illustrates the extended ac volt-hertz product
achieved by using a 5725A. Increased ac voltage load
limits allow using the 5700A Calibrator in systems with
long cables.

Voltage output from the 5725A is available at the 5700A
Calibrator front or rear binding posts. This eliminates the
need to move cables during a procedure that requires
amplified as well as standard calibrator outputs.

The 5725A front or rear-panel OUTPUT binding posts are
only for current output. Extended-range ac and dc current

is supplied through them. Since most meters with a high­current range use a separate high-current input terminal,
this configuration normally eliminates the need to move
cables during a procedure. If a single-point current output
is needed, the 5700A Calibrator can be configured to
source all current outputs through the 5725A binding
posts.

Enhancements to 5700A ac voltage output capability
provided by the 5725A are as follows:

• Frequency limits at higher voltage increase to 100
kHz at 750V, 30 kHz at 1100V.

• Load limits are to 70 mA for frequencies above 5
kHz, and to 50 mA for frequencies less than 5 kHz.

• Capacitive load limits are increased to 1000 pF.

Model 5725A operating functions and ranges are as
follows:

1

5725A

Amplifier

• AC voltage: 220 to 1100V rms up to 70 mA (50 mA <
5 kHz), 40 Hz to 30 kHz; 220 to 750V rms up to 70
mA, 30 kHz to 100 kHz

• DC current: 0 to ±11A

• AC current: 1 to 11A rms, 40 Hz to 10 kHz

Contacting Fluke

To contact Fluke, call one of the following telephone
numbers:

USA: 1-888-99-FLUKE (1-888-993-5853)
Canada: 1-800-36-FLUKE (1-800-363-5853)
Europe: [phone]
Japan: [phone]
Singapore: [phone]
Anywhere in the world [phone]

Or, visit Fluke’s web site at www.fluke.com.

Where to Go From Here

The 5725A Instruction Manual (provided on the CD-ROM)
contains both operating and service information for the
5725A. However, because the 5725A operates under the
control of the 5700A Calibrator, most operating
instructions for the 5725A are in the 5700A/5720A Series
II manuals. Topics such as selecting output values,
connecting to a UUT (Unit Under Test), and self calibration
are covered in the 5700A/5720A Series II Operator
Manual. The list below gives some specific pointers, and
the text further on describes how to use all the manuals to
find 5725A information.

2

For More Information About: Refer To:

Unpacking and setup this manual
Installation and rack mounting this manual
AC line power and interface cabling this manual
Controls, indicators, and binding posts this manual
5725A service information Chapters 4 through 9 of the Instruction Manual
Operating the amplifier Chapter 3 of of the Instruction Manual
Cabling to a Unit Under Test Chapter 4 of the 5700A/5720A Series II Operator

Manual

Self calibration Chapter 7 of the 5700A/5720A Series II Operator

Manual

Full verification

IEEE-488 or serial remote operation Chapter 5 of the 5700A/5720A Series II Operator

5700A/5725A specifications Chapter 1 of the 5725A Instruction Manual
Theory of operation Chapter 4 and 9 of the 5725A Instruction Manual
Troubleshooting Chapter 6 of the 5725A Instruction Manual
Ordering a part Chapter 8 of the 5725A Instruction Manual

Chapter 3 of the 5700A/5720A Series II Service
Manual

Manual

Getting Started

Where to Go From Here

3

5725A

Amplifier

How to Use the Manuals

The following paragraphs describe how each manual
addresses the 5725A.

5725A Getting Started Manual

Use this manual for basic getting started information,
contacting Fluke, unpacking, and general specifications.
This manual also provides setup and operation
information for the 5725A Amplifier, descriptions of the
5725A front and rear-panel features, and information
about setting up and powering up the 5725A. Please read
this information before operating the amplifier.

5725A Instruction Manual

Use the 5725A Instruction Manual for installing the
5725A, learning about its front and rear-panel features,
and for all service-related topics such as maintenance,
troubleshooting, parts lists, and schematics. (The 5725A
Instruction Manual is the service and operator manual for
the 5725A.)

Although the instruction manual also contains a section
devoted to 5725A operating notes, once the 5725A is up
and running you will find that the 5700A/5720A Operator
Manual contains most of the information you need to
operate the 5725A.

5700A/5720A Series II Manual Set

The 5700A/5720A Series II Manual Set consists of a
Getting Started Manual, an Operator Reference Guide, a
Remote Programming Reference Guide and a CD-ROM
containing an Operators Manual and Service Manual (in
addition to all the other manuals provided in printed form).

5700A/5720A Series II Operator Manual

The 5700A/5720A Series II Operator Manual contains the
following information pertaining to the 5725A:

• Specifications for both the 5700A and 5725A (these
same specifications are in this Instruction Manual)

• Cable connections to a UUT for amplified voltage
and current

• Front panel (local) operation

• Remote control operation, IEEE-488 or RS-232

• Self calibration

• Fault codes (these appear on the 5700A Control

Display, or are read from the 5700A in remote control
operation)

• Calibration constant symbolic names

• Glossary of calibration-related terms

4

Getting Started

How to Use the Manuals

5700A/5720A Series II Operator Reference Guide

The 5700A/5720A Series II Operator Reference Guide
contains a summary of operating instructions from the
Operator Manual. This booklet contains information
needed to start up and operate the 5700A, but since the
5700A controls the 5725A, much of this information
applies to the 5725A.

5700A/5720A Series II Remote Programming Reference Guide

The 5700A/5720A Series II Remote Programming
Reference Guide contains a summary of remote
commands for the 5700A. It also contains information
needed to determine system status using the status byte
and registers. Remote commands and system status
apply to a 5725A under control of the 5700A.

5700A/5720A Series II Service Manual

The 5700A/5720A Series II Service Manual is a
maintenance guide for the 5700A. The following 5725A
topics are included in the 5700A/5720A Series II Service
Manual:

• Specifications for both the 5700A and 5725A

• Full verification of the 5700A and 5725A

(recommended every two years)

• Calibration of the 5700A and 5725A

5

5725A

Amplifier

General Specifications

Warm-Up time: 2 X the time since last warmed up, to a

maximum of 30 minutes.
System installation: Rear output configuration and

rack- mount kit available.
Standard interfaces: IEEE-488, RS-232, 5725A,

5205A or 5215A, 5220A, phase lock in (BNC), phase
reference out (BNC).

Temperature performance: Operating: 0 °C to 50 °C.
Calibration: 15 °C to 35 °C. Storage: -40 °C to 75 °C.

Relative humidity: Operating: <80 % to 30 °C, <70 %
to 40 °C, <40 % to 50 °C.
Storage: <95 %, non-condensing.

Safety: Designed to comply with UL1244 (1987); IEC
348-1978; IEC 66E (CO) 4; CSA 556B.

Guard isolation: 20 volts
EMI/RFI: Designed to comply with FCC Rules Part 15,

Subpart J, Class B; VDE 0871, Class B.

Reliability: MIL-T-28800D, para. 3.13.3.

Line Power: 47 to 63 Hz; ±10 % allowed about

selectable nominal line voltage: 100V, 110V, 115V,
120V, 200V, 220V, 230V, 240V. Maximum power:
5700A, 300 VA; 5725A, 750 VA.

Electromagnetic Compatibility: This instrument is
designed to operate in Standards Laboratory
environments where in electromagnetic is highly
controlled. If used in areas with RF fields >0.78 V/m there
could be errors in measurements.

Size:

5700A: Height 17.8 cm (7 in), standard rack increment,
plus 1.5 cm (0.6 in) for feet; Width 43.2 cm (17 in),
standard rack width; Depth 63.0 cm (24.8 in), overall;

57.8 cm (22.7 in), rack depth.
5725A: Height 13.3 cm, (5.25 in); Width and depth same

as 5700A. Both units project 5.1 cm, (2 in) from rack
front.

Weight: 5700A: 27 kg (62 lbs); 5725A: 32 kg (70 lbs).

6

43.2 cm (17 in)

Getting Started

General Specifications

17.8 cm (7 in)

63 cm (24.8 in)

Figure 1. 5700A Dimensions

6.35 cm (2.5 in)

FOR CABLE

ACCESS

7

5725A

Amplifier

Unpacking and Inspection

Warning

The 5725A amplifier is capable of supplying
lethal voltages. Do not touch the 5700A
output terminals. Read this section before
operating the 5725A.

The 5725A is shipped in a container that is specially
designed to prevent damage during shipping. Inspect the
5725A carefully for damage, and immediately report any
damage to the shipper. Instructions for inspection and
claims are included in the shipping container.

Table 1. Standard Equipment

Item Model or Part Number

Amplifier 5725A
Line Power Cord (See Table 2 and Figure 2)
Shielded 5700A/5725A Interface Cable 842901
5725A Getting Started Manual 1780175
5725A CD-ROM (contains Instruction Manual) 1780182
Spare 4A, 250V Fuse 216846
Certificate of Calibration (No Part Number)

If you need to reship the 5725A, use the original
container. If it is not available, you can order a new
container from Fluke by identifying the amplifier’s model
and serial number.

When you unpack the 5725A, check for all the standard
equipment listed in Table 1. Report any shortage to the
place of purchase or to the nearest Technical Service
Center. Visit Fluke web site for Service Center locations.
If performance tests are required for your acceptance
procedures, refer to Chapter 3 of the 5700A/5720A Series
II Service Manual for instructions.

Line power cords available from Fluke are listed in
Table 2 and illustrated in Figure 2.

8

Unpacking and Inspection

Table 2. Line Power Cord Types Available from Fluke

TYPE VOLTAGE/CURRENT FLUKE OPTION NUMBER

North America 120V/15A LC-1
North America 240V/15A LC-2
Universal Euro 220V/16A LC-3
United Kingdom 240V/13A LC-4
Switzerland 220V/10A LC-5
Australia 240V/10A LC-6
South Africa 240V/5A LC-7

Getting Started

9

5725A

Amplifier

LC-1 LC-2 LC-3 LC-4

LC-5 LC-6 LC-7

10

Figure 2. Line Power Cords Available for Fluke Instruments

aq2f.eps

Getting Started

Service Information

Service Information

Each 5725A Amplifier is warranted to the original
purchaser for a period of one year beginning on the date
received. The warranty is located at the front of this
manual.

Factory-authorized service and technical advice for the
5725A is available at Fluke Service Centers. A complete
list of service centers is available at www.fluke.com.

Warning

Servicing described in this manual is to be
done by qualified service personnel only. To
avoid electrical shock, do not service the
5725A unless you are qualified to do so.

The owner may choose to repair a 5725A using the
troubleshooting information in Chapter 7 of the Instruction
Manual to isolate a faulty module, then use the Module
Exchange Program. Refer to the Fluke catalog or contact
a Service Center representative for the module exchange
procedure.

Placement and Rack Mounting

You can stack the 5725A on top of or below the 5700A
Calibrator. (Choose the configuration that provides the
easiest access to the 5700A Calibrator controls.) Or, you
can mount the 5725A in a standard-width, 24-inch (61­cm) deep equipment rack. For bench-top stacking, the
5725A is equipped with non-skid feet. To mount the
5725A in an equipment rack, order the accessory 5725A
Rack Mount Kit, Model Y5735. An instruction sheet is
packed with the kit.

Caution

Use only the rack mount slides included in
the Y5735 kit. Rack mount slides intended for
other instruments can block the side
ventilation holes on the 5725A and cause
overheating.

11

5725A

Amplifier

Cooling Considerations

Caution

Damage caused by overheating may occur if
the area around the air intake is restricted,
the intake air is too warm, or the fan filter
becomes clogged.

Accuracy and dependability of all internal parts of the
5725A are enhanced by maintaining the coolest possible
internal temperature. By observing the following rules you
can lengthen the life of the 5725A:

• The area around the fan filter must be at least 3
inches from nearby walls or rack enclosures.

• Exhaust perforations on the sides of the 5725A must
be clear of obstructions. Most of the heat exits from
the side vents near the front.

• Air entering the instrument must be room
temperature. Make sure that exhaust from another
instrument is not directed into the fan inlet.

• Clean the fan filter every 30 days, or more frequently
if the 5725A is operated in a dusty environment.
(Instructions for cleaning the fan filter are in
Chapter 6.)

Connecting to the 5700A Calibrator

Proceed as follows to connect the 5725A to the 5700A:

1. Turn the power off for both instruments and
disconnect their line power cords.

2. Connect either end of the interface cable to the
5725A connector labeled 5700A. Dress the cable
only as Figure 3 shows. The figure shows how to
dress the cable in installation arrangements with the
5725A on top or bottom.

3. Connect the other end to the 5700A connector
labeled 5725A.

The 5700A/5725A interface cable provides all the digital
and analog control signals for the amplifier, and it
provides conductors to route amplified voltage to the
5700A OUTPUT binding posts.

12

5725A
AMPLIFIER

Getting Started

Connecting to the 5700A Calibrator

5700A

5725A

5700A
CALIBRATOR

5725A

5700A

5700A
CALIBRATOR

5725A
AMPLIFIER

aq3f.eps

Figure 3. Correct Way to Dress Interface Cable

13

5725A

Amplifier

Selecting Line Voltage

The 5725A arrives from the factory configured for the line
voltage normally appropriate for the country of purchase,
or as specified at the time of purchase. Check the line
power label on the rear panel of the 5725A to verify that
the line voltage matches local line power. Figure 4 shows
the location of the line power label and switches, and the
switch settings for each line voltage.

The 5725A can be set to operate from eight different
nominal line voltages; each voltage setting has a voltage
tolerance of ±10 % and a frequency range of 47 to 63 Hz.
The line voltage switches are located on the bottom left
side of the rear panel.

To change the line voltage setting, set the line voltage
selection switches to the correct setting shown in
Figure 4.

14

CAUTION

FOR FIRE PROTECTION
REPLACE ONLY WITH A 250V FUSE
OF INDICATED RATING.

Getting Started

Selecting Line Voltage

CHASSIS
GROUND

GROUNDING

WARNING

CONNECTOR IN POWER CORD
MUST BE CONNECTED TO
ENSURE PROTECTION FROM
ELECTRONIC SHOCK.

47-63 Hz
750VA MAX

!

FUSE

VOLTAGE

SELECTION

S2 S3 S4

100V
110V
115V
120V

S2 S3 S4

200V
220V
230V
240V

CAUTION

FOR FIRE PROTECTION
REPLACE ONLY WITH A 250V FUSE
OF INDICATED RATING.

VOLTAGE

FUSE

SELECTION

S2 S3 S4

100V

!

110V

F8A 250V

(FAST)

115V
120V

S2 S3 S4

200V

!

220V

F4A 250V

(FAST)

230V
240V

S4S3S2

FUSE

!

F8A 250V

(FAST)

!

F4A 250V

(FAST)

JOHN FLUKE MFG. CO., INC.

MADE IN U.S.A.
PATENTS PENDING
NO INTERNAL USER SERVICEABLE

PARTS REFER SERVICE TO
QUALIFIED SERVICE PERSONNEL

TO CLEAN FILTER
REMOVE FROM INSTRUMENT
AND FLUSH WITH WARM
SOAPY WATER

Figure 4. Line Power Label and Switch Location

5700A CALIBRATOR

CURRENT

OUTPUT

HI

11A MAX

20V PK

LO

MAX

CALIBRATION

ENABLE NORMAL

aq4f.eps

15

5725A

Amplifier

Accessing the Fuse

Caution

To prevent instrument damage, verify that
the correct fuse is installed for the line
voltage setting. Acceptable fuse types are
Bussman type MTH or Littelfuse type 312 or
equivalent, of the appropriate amperage
rating. Use only a 4A, 250V fast-blow fuse
when the line voltage selection switches are
set in the range 200-240V.

Note

A spare 4A, 250V fuse is shipped with the 5725A
to ensure that one is available for use on the
200-240V range.

The line power fuse is accessible on the rear panel. The
fuse rating label to the right of the fuse holder (labeled
FUSE) shows the correct replacement fuse rating for
each line voltage setting. To check or replace the fuse,
refer to Figure 5 and proceed as follows:

1. Turn off the POWER switch and disconnect the line
power cord from ac line power.

2. Insert the blade of a standard screwdriver in the slot
of the fuse holder labeled FUSE.

3. Turn the screwdriver counterclockwise until the cap
and fuse pop free.

4. To reinstall the fuse, reverse this procedure.

16

Getting Started

Accessing the Fuse

CHASSIS
GROUND

GROUNDING

WARNING

CONNECTOR IN POWER CORD
MUST BE CONNECTED TO
ENSURE PROTECTION FROM
ELECTRONIC SHOCK.

47-63 Hz
750VA MAX

!

FUSE

CAUTION

FOR FIRE PROTECTION
REPLACE ONLY WITH A 250V FUSE
OF INDICATED RATING.

VOLTAGE

FUSE

SELECTION

S2 S3 S4

100V

!

110V

F8A 250V

(FAST)

115V
120V

S2 S3 S4

200V

!

220V

F4A 250V

(FAST)

230V
240V

S4S3S2

Figure 5. Accessing the Fuse

JOHN FLUKE MFG. CO., INC.

MADE IN U.S.A.
PATENTS PENDING
NO INTERNAL USER SERVICEABLE

PARTS REFER SERVICE TO
QUALIFIED SERVICE PERSONNEL

TO CLEAN FILTER
REMOVE FROM INSTRUMENT
AND FLUSH WITH WARM
SOAPY WATER

5700A CALIBRATOR

CURRENT

OUTPUT

HI

11A MAX

20V PK

LO

MAX

CALIBRATION

ENABLE NORMAL

aq5f.eps

17

5725A

Amplifier

Connecting to Line Power

Warning

To avoid shock hazard, connect the factory­supplied, three-conductor line power cord to
a properly grounded power outlet. Do not
use a two-conductor adapter or extension
cord; this will break the protective ground
connection.

After verifying that the line voltage selection switches are
correctly set, verify that the correct fuse is installed.
Connect the 5725A to a properly grounded three-prong
outlet.

Front-Panel Features

Front-panel features are called out in Figure 6 and are
described in Table 3.

18

Getting Started

Front-Panel Features

1

4

3

2

CURRENT

HI

LO

OUTPUT

11A

MAX

2OV

PK

MAX

8

VOLTAGE MODE
CURRENT MODE
5725A STANDBY

FAULT
OVERLOAD
CABLE OFF

6

POWER

5

7

Figure 6. Front-Panel Features

aq6f.eps

19

5725A

Amplifier

Table 3. Front-Panel Features

A

B

C

D

CURRENT OUTPUT Binding Posts

The source of all amplified current if the 5725A is configured for front output. You can set the 5700A to source
all 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 Chapter 4 of the 5700A/5720A Series II Operator Manual.

5725A STANDBY Indicator

Lit whenever the 5725A is in any of three standby modes. This indicator is lit alone in standby mode; it is lit at
the same time as VOLTAGE MODE in voltage standby mode; and it is lit at the same time as CURRENT
MODE in current standby mode. (See "5725A Operating Functions and Modes," in Chapter 3 of the Instruction
Manual.)

CURRENT MODE Indicator

Lit when the 5725A is in current standby or current operate mode. In current standby mode, the STANDBY
indicator is also lit. (See "5725A Operating Functions and Modes," in Chapter 3 of the Instruction Manual.)

VOLTAGE MODE Indicator

Lit when the 5725A is in voltage standby or voltage operate mode. In voltage standby mode, the STANDBY
indicator is also lit. (See "5725A Operating Functions and Modes," in Chapter 3 of the Instruction Manual.)

20

Getting Started

Front-Panel Features

E

F

G

H

POWER Switch

Turns the power on and o ff. The switch i s a push-push type; the first push turns the power on and locks the
switch in, and the second push turns the power off and releases the switch.

CABLE OFF Indicator

Lit when the 5700A/5725A interface cable is not connected, or when the 5700A power is turned off. This
condition also lights the FAULT indicator.

OVERLOAD Indicator

Lights on entering current operate mode in overcompliance conditions (load not connected to the proper
binding posts, or load resistance too high). The OVERLOAD indicator also lights on entering voltage operate
mode if the load resistance is too low.

FAULT Indicator

Lit whenever any fault condition is detected. Normally, a fault code and message appears on the 5700A
Control Display when this happens. The FAULT indicator also comes on with the CABLE OFF indicator when
the 5700A/5725A interface cable is not connected. In case of a FAULT indication, check the 5700A/5725A
interface cable connections, make sure the 5700A power is on, and check that the load is appropriate and
connected to the correct binding posts. Refer to the Instruction Manual under "Service Information" in Chapter
2, or in Chapter 7, Troubleshooting, in case of a FAULT indication that appears to be a malfunction.

21

5725A

Amplifier

Rear-Panel Features

Rear-panel features are called out in Figure 7 and briefly
described in Table 4.

1

22

JOHN FLUKE MFG. CO., INC.

MADE IN U.S.A.
PATENTS PENDING
NO INTERNAL USER SERVICEABLE

PARTS REFER SERVICE TO
QUALIFIED SERVICE PERSONNEL

TO CLEAN FILTER
REMOVE FROM INSTRUMENT
AND FLUSH WITH WARM
SOAPY WATER

5700A CALIBRATOR

20V PK

CURRENT

OUTPUT

HI

11A MAX

MAX

LO

CALIBRATION

ENABLE NORMAL

CHASSIS
GROUND

WARNING

GROUNDING
CONNECTOR IN POWER CORD
MUST BE CONNECTED TO
ENSURE PROTECTION FROM
ELECTRONIC SHOCK.

47-63 Hz
750VA MAX

!

FUSE

CAUTION

FOR FIRE PROTECTION
REPLACE ONLY WITH A 250V FUSE
OF INDICATED RATING.

VOLTAGE

FUSE

SELECTION

S2 S3 S4

100V

!

110V

F8A 250V

(FAST)

115V
120V

S2 S3 S4

200V

!

220V

F4A 250V

(FAST)

230V
240V

S4S3S2

9

7

8

6

5

4

3

2

aq7f.eps

Figure 7. Rear-Panel Features

Table 4. Rear-Panel Features

Getting Started

Rear-Panel Features

A

B

C

D

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 Chapter 4 of the 5700A/5720A Series II 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 Chapter 4 of the Instruction Manual, or for remote operation to Chapter 5, of the
5700A/5720A Series II 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.

23

5725A

Amplifier

E

F

G

H

I

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" for the fuse
replacement procedure.

Line Voltage Selection Switches

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

Fuse Holder

The line power fuse. Refer to "Accessing the Fuse" 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.

24

Getting Started

Turning on the 5725A Amplifier

Warning

To avoid electric shock, make sure the 5725A
is safely grounded as described in Chapter 2
of the Instruction Manual.

Caution

Before turning the 5725A on, make sure that
the line voltage selection switches are set
properly for your line voltage. Refer to Figure
4 or the line voltage switch label and check
the line voltage setting now if you have not
already done so.

When you turn on the 5725A, all six front-panel indicators
light briefly and the 5725A undergoes a self test. If the
self test fails, a fault message on the 5700A Control
Display identifies the failure, indicating that you should
service the 5725A.

After the 5725A passes its self test, it transfers its
calibration constants to the 5700A. During the transfer,
the BOOST indicator on the 5700A flashes. For the few
seconds that the BOOST indicator is flashing, the 5725A
is not usable. After the transfer is complete, the 5725A is
in standby mode. (See "5725A Operating Functions and
Modes" in Chapter 3 of the Instruction Manual for more
information about standby mode.)

Warm Up

When you turn on a cold 5725A, warm it up for 30
minutes to allow the components inside to stabilize. This
ensures that the 5725A meets or exceeds the
specifications.

If you turn off the 5725A after it has warmed up, allow it to
warm up again for at least twice the length of time it was
turned off (up to a maximum of 30 minutes of warm-up).
For example, if the 5725A is turned off for 10 minutes,
allow it to warm up again for at least 20 minutes.

25

5725A

Amplifier

26