Fluke 4265A User manual

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Instruction Manual
Vali •'tionics International, Inc
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Wrtwl Ek COPY
Model
4265A
Binary Programmable
Power Source
P/N 310631 JANUARY 1973
REV. 12/76

LIMITED WARRANTY
The JOHN FLUKE MFG CO.. INC., warrants each instrument it manufactures to be free from defects in material and workmanship under
normal use and serviced the period of one year from date of purchase. This warranty extends only to the original purchaser. This
warranty shall not apply to fuses, disposable batteries (rechargeable type batteries are warranted for 90 days), or any product or parts
which have been subject to misuse, neglect, accident or abnormal conditions of operations.
In the event of failure of aproduct covered by this warranty. John Fluke Mfg. Co.. Inc., will repair and calibrate an instrument returned to
an authorized Service Facility within one year of the original purchase; provided the warrantor sexamination discloses to its satisfaction
diaUhe product was defective. The warrantor may. at its option, replace the product in lieu of repair. With regard to any mstrument
retu rned within one year of the original purchase, said repairs or replacementwill be made without charge. If the fault has been caused by
misuTneglect accident or abnormal conditions of operations, repairs will be billed at anominal cost In such case, an estimate will be
submitted before work is started, if requested.
ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS SHALL BE LIMITED TO APERIOO OF
TOELVE MONTHS FROM THE DATE OF PURCHASE. THE FOREGOING WARRANTY ISIINILIEU OF ALL
OTHER WARRANTIES EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED
WARRANTY OF MERCHANTABILITY. FITNESS OR ADEQUACY FOR ANY PARTICULAR PURPOSE OR
USe johHN FLUkI MFG. CO.. INC. SHALL NOT BE LIABLE FOR ANY SPECIAL. INCIDENTAL OR
CONSEQUENTIAL DAMAGES, WHETHER IN CONTRACT. TORT OR OTHERWISE.
NOTE- Some states do not allow limitations on how long an implied warranty lasts, or the exclusion or limitation
of incidental or consequential damages, so the above limitations or exclusion may not .
'
*°'»»“• ™s
warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
It any fault develops, the following steps should be taken:
iNotifv the John Fluke Mfg Co. Inc. or nearest Service facility, giving full details of the difficulty, and include the Modelnumber.
typedumber, and serial number. On receipt of this information, service data or shipping instructions will be forwarded to you.
2. On receipt of the shipping instructions, forward the instrument, transportation prepaid. Repairs will be made at the Service
Facility and the instrument returned, transportation prepaid.
SHIPPING TO MANUFACTURER FOR REPAIR OR ADJUSTMENT
SSSESSSSS
shock-absorbing material.
CLAIM FOR DAMAGE IN SHIPMENT TO ORIGINAL PURCHASER
The instrument should be thoroughly Inspected Immediately upon original
by the customer.
Netherlands.
-For European customers, Air Freight prepaid.
John Fluke Mfg. Co., Inc. •P.O. Box 43210 •Mounllake Terrace, Washington 98043
Rev. 12/77

4265A
Table of Contents
SECTION TITLE PAGE
1INTRODUCTION AND SPECIFICATIONS 1-1
i-l. Introduction 1-1
1-
6. Specifications 1-2
2OPERATING INSTRUCTIONS 2-1
2-
1. Introduction 2-1
2-3, Shipping Information 2-1
2-6. Input Power 2-1
2-8, Rack Installation 2-1
2-10. Operating Features 2-3
2-12. Operating Notes 2-3
2-
24. Programming Information 24
3THEORY OF OPERATION 3-1
3-
1. Introduction 3-1
3-3. Fundamental Circuit Description 3-1
3-5. Block Diagram Analysis 3-2
3-
14. Circuit Descriptions 3-3
4MAINTENANCE 4-1
4-
1. Introduction 4-1
4-3. Service Information 4-1
4-6. General Maintenance 4-1
4-13. Maintenance Access 4-1
4-15. Calibration Procedures 4-2
(continued on page ii)
i

426 5A
TABLE OF CONTENTS, a>nmiuet/
SECTION TITLE
5LIST OF REPLACEABLE PARTS
5-1 Introduction
54 Parts List Column Descriptions
5-5 Manufacturers' Cross Reference List Column Descriptions .. .
5-6 How to Obtain Parts
5-
9Serial Number Effectivity
6OPTIONS AND ACCESSORIES
6-
1Introduction
6-3 Option Information
6-5 Accessory Information
Model A4200 Manual Control Unit
Schematic Diagram A4200-1000
Option -09, Multi-Strobe Isolated Logic
Schematic Diagram 4200-1024 (2 sheets)
Schematic Diagram 4200-1025
Rack Mounting Fixtures
Program Connector
Extender PCB assembly and Cable Extender Assembly
7GENERAL INFORMATION
8SCHEMATIC DIAGRAMS
A1 Mother Board/A7 Binary Display 4265A-101
1
4265A-1013
A2 Power Supply/ A10 Connector Board 42S0A-1061
4250A-1012
A3 Preamplifier 426SA-1051
A4 Option -03, External Reference 4210A-1041
AS Binary Ladder 42 16A- 1031
A6 Isolated Control Logic (2 sheets) 4275A- 1021
A8 Option —06, Programmable Current Limiter 4250A- 1081
A9 Power Amplifier 4250A- 1071
2/75
ii
PAGE
5-1
5-1
5-1
5-2
5-2
5-
3
6
-
1
6-1
6-1
6-1
7-
1
8
-
1

static awareness
AMessage From
John Fluke Mfg. Co., Inc.
Some semiconductors and custom IC's can be
damaged by electrostatic discharge during
handling. This notice explains how you can
minimize the chances of destroying such devices
by:
1. Knowing that there is aproblem.
2. Learning the guidelines for handling them.
3. Using the procedures, and packaging and
bench techniques that are recommended.
The Static Sensitive (S S)devices are identified in the Fluke technical manual parts list with the symbol
<S>
The following practices should be followed to minimize damage to S.S. devices.
2. KEEP PARTS IN ORIGINAL CONTAINERS
UNTIL READY FOR USE. 4. HANDLE S.S. DEVICES BY THE BODY

5.
USE ANTI-STATIC CONTAINERS FOR
HANDLING AND TRANSPORT
6.
DO NOT SLIDE S.S. DEVICES OVER
ANY SURFACE
7.
AVOID PLASTIC, VINYL AND STYRAFOAM
IN WORK AREA
8. HANDLE S.S. DEVICES ONLY AT A
STATIC-FREE WORK STATION
9. ONLY ANTI-STATIC TYPE SOLDER-
SUCKERS SHOULD BE USED.
10. ONLY GROUNDED TIP SOLDERING
IRONS SHOULD BE USED.
Anti-static bags, for storing S.S. devices or pcbs
with these devices on them, can be ordered from the
John Fluke Mfg. Co., Inc.. SeesectionSin any Fluke
technical manual for ordering instructions. Use the
following part numbers when ordering these special
bags.
John Fluke
Part No. Bag Size
453522 6" x8"
453530 8" x12"
453548 16” x 24"
454025 12" x15"

426 5A
Section 1
Introduction &Specifications
1-1. INTRODUCTION
1-2. The Model 4265 Ais aprogrammable, bipolar dc
voltage source. Output voltage is from 0to 65.532 vdc in
two ranges; 16 and 65 vdc. Programming resolution using
the internal reference voltage is 1mv on the 16 volt range
and 4mv on the 65 volt range. Output accuracy is ±.01%
of the programmed level on both voltage ranges. After a100
/£ec settling time, aREADY/NOT READY FLAG indicates
that the output has settled to ±.01% of the programmed
increment for aresistive load. The output current is rated
at ±1 ampere maximum and is limited to approximately
±1.1 ampere in the event of an overload or short circuit.
The sink current (milliamps) is rated at 1000-10 Eout max-
imum. AProgrammable Current Limiter (Option -06) is
available to allow programming the maximum output cur-
rent to a lower level. Acurrent limit flag indicates when a
sink or source current overload exists with or without the
-06 Option.
1-3. Programming requirements are compatible with
DTL or TTL logic levels. Contact or relay closures can also
be used. The voltage source is programmed on the low
range using straight binary coding. The high range is also
programmed in the same manner, but the actual output is
four times the programmed level. Two’s complement cod-
ing is required for negative outputs when the Isolated Con-
trol Logic (-01 Option) is installed. All programming in-
puts and flag outputs are available through a50 pin Am-
phenol, Blue Ribbon connector located on the rear panel. A
+5 vdc output is also available at this connector and is used
to provide power for external programming circuitry. Nega-
tive logic is employed for programming. The logic levels
i
are as follows:
Logic “0” =+2.0 vdc to +5.0 vdc or open circuit
Logic lT* =0to +0.4 vdc or short circuit to
LOGIC GRD.
1-4. Three options are available to provide tailoring
of the power supply to fit application requirements. These
options are identified by numeric designations -03, -06,
and -09. Adescription of each option is provided in
Table 1-1. These options may be installed at the factory
when the instrument is ordered or in the field at alater
time.
1-5. Physically, the power source is completely solid
state. Plug in printed circuit boards, with easy to reach
test points and adjustments, are used for ease in servicing.
The unit is forced air cooled. This results in lower com-
ponent temperatures and thus higher reliability than would
normally be obtained in asource of this power capability.
The chassis is designed for bench top use, or it can be instal-
led in astandard equipment rack by using the Accessory
Rack Mounting Fixtures.
2/75 1-1

4265A
Table 1-1. OPTIONS
OP-
TIONS TITLE DESCRIPTION
-01 ISOLATED CONTROL LOGIC
(Now Standard)
Separates the external digital interface logic and attendant noise from
the Model 4265A analog circuitry. Impedance between the interface
logic and the analog circuitry is greater than 109ohms, in parallel with
3pf, It also provides adata storage that allows multiplexing of several
voltage sources from one system interface register or data bus. Two's
complement binary coding is required for negative outputs.
-02 FRONT PANEL DISPLAY
{Now Standard)
Lamps (light emitting diodes) installed on the front panel which indi-
cates the programmed VOLTAGE LEVEL, SIGN, CURRENT LIMIT,
EXT REF, POWER ON, and STDBY conditions.
-03 EXTERNAL REFERENCE
(Field Installable)
Allows the use of an external signal source in place of the internal refer-
ence voltage. Any dc or ac signal can be used that has an amplitude
from 0 to ±14.5 volts and afrequency from dc to 30 kHz. Input im-
pedance is 100K, in parallel with 70 pf.
-04 DIRECT COUPLED CONTROL
LOGIC
(No Longer Available)
The Direct Coupled Control Logic is no longer offered as an option to
the 4200 series instruments. The Isolated Control Logic (see descrip-
tion above) is now standard equipment on alt instruments.
-05 BLANK FRONT PANEL
{No Longer Available)
The Blank Front Panel is no longer offered as an option to the 4200
series instruments. The Front Panel Display (see description above) is
now standard equipment on all instruments.
-06 PROGRAMMABLE CURRENT
LIMITING
(Field Installable)
Programmable current limit is provided in two ranges, 100 ma and 1
ampere. Each range may be programmed in 10% increments from 10%
to 110% of range.
iMULTI-STROBE ISOLATED
LOGIC
(Field Installable)
Permits any of the Fluke 4200 series Programmable Voltage Sources to
be remotely controlled by alarge variety of program sources such as a
computer, asystem coupler, as well as aFluke Automatic Test Equip-
metn System. Refer to Section 6for details.
1-6. SPECIFICATIONS
OUTPUT VOLTAGE 0to ±16.383 vdc
0to ±65.532 vdc
(Maximum output terminal voltage =±66v minimum)
OUTPUT VOLTAGE RESOLUTION . .
I6v Range
65v Range
1-2
1.0 mv
4mv
(Provisions have been made to allow changing of the MSB
weight to 8000 and 32000 mv by installation of ajumper
in the Preamplifier,)
2/75

OUTPUT CURRENT
CURRENT SINK CAPABILITY .
ACCURACY (1 5°C to 35°C, 90 days)
16v Range
65 vRange
STEADY STATE RIPPLE AND NOISE (10 Hz to 10 MHz
bandwidth) I6v Range
65 vRange
OUTPUT IMPEDANCE
EXTERNAL REFERENCE (Option -03)
Voltage Range
Input Impedance
Output Voltage
16v Range
65vRange
Output Current
Frequency Range
Accuracy (15°C to 35°C, 90 days with respect to
the External Reference, Ex r) 16vRange .
65 vRange .
Programming Resolution (Least significant bit)
16v Range
65 vRange
PROGRAMMABLE CURRENT LIMIT (Option -06)
100 ma Range
1amp Range
Minimum program possible
SPEED
OUTPUT STABILITY (Constant load, line and temperature)
16v Range, 24 hours
90 days
65vRange, 24 hours
90 days
TEMPERATURE COEFFICIENT (35°C to 15°C)
16v Range
65v Range
LOAD REGULATION
LOAD RECOVERY
4265A
0toil ampere
(Short circuit protected at LI ampere)
[sink (ma) =1000 —10 Eout (Overload protected)
The Current Limit Flag is energized when acurrent sink
overload condition occurs.
±(0.01% of program +100 uV)
±(0.01% of program +300 uV)
500 uV rms 7mV pp
1mV rms 7mV p-p
0.02 milliohms @dc; 1ohm @30 kHz
0to ±14.5 VDC or peak ac
100k ohms in parallel with 70 pf
0to 12v rms, 17V peak
0to 46vrms, 66V peak
707 ma rms, 1.0 amp peak
dc to 30 kHz
±(0.01% of program +.0001%(||^) +100 uV) at dc.
±(0.01% of program +.0001%(^-^-) +300 uV) at dc.
Exr x10"4volts
Exr x4x10"* volts
±10 mA to +110 mA in 10 mA increments
±100 mA to +1.1 amp in 100 mA increments
±10 mA
Settles to 0.01% of the programmed change in 100 fsec. A
range change does not increase settling time.
±(10 ppm of program +40 uv)
±(30 ppm of program +70 uv)
±(10 ppm of program +120 uv)
±(30 ppm of program +210 uv)
±(10 ppm of program +15 uv) per °C
±(10 ppm of program +15 uV) per &C
An output current change of 1ampere causes the output
voltage to change less than 0.001% of range.
The output voltage will settle to within 0.01% of final value
in 100 f£t cafter an output current change of 1amp.
2/75 1-3

4265A
LINE REGULATION The output voltage will change less than 0*00 1U ot range
for a±10% change in line voltage.
OUTPUT TERMINALS HIGH, LOW, HIGH SENSE, LOW SENSE. CHASSIS,
GUARD. Terminals located on rear panel. Tlie GUARD
terminal can be floated up to 1000 volts above chassis
ground.
PROGRAM CONTROL CONNECTOR A50 pin connector on rear panel* Mating connector is Am-
(See Table 1-3) phenol, Blue Ribbon, Part No. 57-30500.
INPUT POWER 115/230 vac ±10%, 48—62 Hz single phase, 200 watts fully
loaded.
ENVIRONMENTAL
Temperature 0Cto 50 Coperating*, 40 Cto 75 Cstorage.
Relative Humidity 0to 80%
Shock 20g, 1 1 millisecond half-sine wave
Vibration 4.5g, 10—55 Hz
Altitude 0to 10,000 ft -Operating 50,000 ft -Non-operating
SIZE (See Figure 1-1) 5-1/4” high x17” wide x19-7/8” (max) deep
ACCESSORIES
Manual Control Unit Allows manual checkout, calibration, and control. FLUKE
Model A4200.
Rack Mounting Brackets M05-205-600
Chassis Slides MO0-260-610 (18 )
MOO-280-610 (24”)
Mating Connector Amphenol, Blue Ribbon 57-30500, FLUKE PART NO.
266056.
Extender Card FLUKE PART NO. 292623
Figure 1-1. OUTLINE DRAWING