Fluke 8026B Service manual

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NOTE

This manual documents the Model 8026B and Its assemblies at the revision levels
shown In Appendix A. If your Instrument contains assemblies with different revision
letters, it will be necessary for you to either update or i>acfcdate this manual. Refer to
the supplemental change/errata sheet for newer assemblies, or the backdating stieet
In Appendix A for older assemblies.

8026B

Digital

Multimeter

P/N 646414

JUNE 1982

ei982,

John Fluke Mfg. Co., Inc.,

All rights reserved. Litho in

Instruction Manual

IFLUKEI

U.S.A.

Dear Customer:

Congratulations! We at Flulce are proud to present you with tiie Model8026 B Multimeter.

This instrument represents the very latest in integrated circuit and display technology. As a
result, the end product is a rugged and reliable instrument whose performance and design
exhibit the qualities of a finely engineered lab instrument.

To fully appreciate and protect your investment,
the manual. As always. Fluke stands behind your 8026B with a full 2-year warranty and a
worldwide service organization. If the need arises, please don't hesitate to call on us.

Thank you for your trust and confidence.

John Fluke Mfg. Co., Inc.

we

suggest you take a few moments to read

8026B

Table of Contents

SECTION TITLE PAGE

1 INTRODUCTION AND SPECIFICATIONS 1-1

1-1. INTRODUCTION 1-1

1.1.

PREPARING FOR OPERATION 1-2

1-4. Unpacking 1-2
1-7. Battery and'or Fuse Installation/Replacement 1-2

1-9. PHYSICAL FEATURES 1-4
1-11.

INITIAL CHECK-OUI PROCEDURE 1-4

1-13. ACCESSORIES 1-8

1-15. SPECIFICATIONS 1-8

2 OPERATING INSTRUCTIONS 2-1

2-1.

jNTRODUCnON 2-1

2-.V INPUT POWER 2-1

2-1.

Battery Life 2-1

2-6.

Line Power Operation 2-1

2-8. OPERATING NOTES 2-1

2-10. Input Overload Protection 2-2
2-12. Input Connections to COMMON 2-3
2-14. Fuse Check ;... 2-3
2-16. Fuse Replacement 2-3
2-18.

The Display 2-3
2-22. OPERATION 2-4
2-24. MEASUREMENT TECHNIQUES 2-4

2-26. AC Measurement 2-4
2-32.

Voltage AC DC 2-10

2-35.

CurremAC.'DC 2-10

2-39. Resistance 2-13
2-43. Continuity 2-15

2-46. Conductance 2-16
2-50. APPLICATIONS 2-16

2-52. Transistor Tester 2-16

2-57.

leakage Tester 2-19

;• (continued on page ii)

8026B

TABLE OF CONTENTS, continued

SECTION TITLE PAGE

3 THEORY OF OPERATION 3-1

3-1.

INTRODUCTION 3-1 .
3-3. OVERAI.l. FUNCTIONAL DESCRIPI ION 3-1
3-8. BLOCK DIAGRAM ANALYSIS 3-1

3-9. A/ V Converter 3-1
3-18. Input Signal Conditioners 3-6

4 MAINTENANCE 4-1

4-1.

INTRODUCTION 4-1

4-3,

SERVICE INFORMATION 4-1

4-7.

GENERAL INFORMAIION 4-2

4-8.

Access Information 4-2

4-17.

Cleaning 4-5

4-19.

Battery/Backup Fuse Replacement 4-5

4-21.

PERFORMANCE TES I 4-6

4-23.

Initial Procedure 4-6

4-25.

Display lest 4-6

4-27.

Resistance/Conductance lest 4-7

4-29.

Continuity Test 4-7

4-31.

DC Voltage Test 4-8

4-33.

AC Voltage Test 4-8

4-35.

DC Current 1 est 4-9

4-37.

CALIBRATION 4-10

4-40.

IROUBLESHOOTING 4-11

5 LIST OF REPLACEABLE PARTS 5-1

5-1.

INTRODUCTION 5-1

5^. HOW TO OBTAIN PARTS 5-1

6 ACCESSORY INFORMATION 6-1

6-1.

INTRODUCTION 6-1
6-3. DELUXE CARRYING CASE (C-90) 6-1
6-5. TEMPERATURE PROBE (80T-I50C and 80T-I50K) . 6-1
6-6. Introduction 6-1
6-8. Specifications , 6-1
6-9. CURRENT TRANSFORMER (801-600) 6-4

6-10. Introduction 6-4
6-12. Specifications 6-4
6-13. HIGH VOLTAGE PROBE (80K-6) 6^

6-14. Introduction 6-4

6-16. Specifications 6-4
6-17. HIGH VOLTAGE PROBE (80K-40) 6-4
6-18. Introduction 6-4
6-20. Specifications 6-4
6-21.

HIGH FREQUENCY PROBE (83RF) 6-5

// (continued on page iii)

8026B

TABLE OF CONTENTS, continued
SECTION TITLE PAGE

6-22. Introduction 6-5
6-24. Specifications 6-5
6-25. HIGH FREQUENCY PROBE (85RF) 6-5
6-26. Introduction 6-5
6-28. Specifications 6-5
6-29. BATTERY ELIMINATOR (A81-115) 6-6
6-31.

CURRENT SHUNT (80J-10) 6-6

6-32. Introduction 6-6
6-34. Specifications 6-7
6-35. AC/TX'CURRENT PROBE (Y8100) 6-7
6-36. Introduction 6-7
6-39. .Specifications 6-7
6-40. AC CURRENT TRANSFORMER (Y810I) 6-8
6-41 Introduction 6-8
6-43. Specifications 6-8

6^. SAFETY DESIGNED TEST LEAD SF I (Y8132) .... 6-8

6^6. DEI.U.XF TEST LEAD SET (Y81-34) 6-8
6-48. SLIM FLEX TEST LEAD SEI (Y8140) 6-8

7 SCHEMATIC DIAGRAIMS 7-1

APPENDIX A A-1

8026B

List of Tables

TABLE TITLE PAGE

1-1
1-2

1-3

2-1
2-2
4-1
4-2
4-3
4-4
4-5

4-6

5-1
5-2.
5-3
5^.
6-1

8026B Controls. Indicators and Connectors 1-6

8026B Accessones 1-9

8026B Specifications 1-9

Input Overload Limits 2-2
Voltage/Current Capability of Resistance Ranges 2-15
List of Recommended Test Equipment 4-2
Resistance/ Conductance Checks 4-7.

DC Voltage Checks 4-8.

AC Voltage Test 4-9.

DC Current (mA) Checks 4-10
Troubleshooting Guide 4-12
8026B Final Assembly 5-3.
AI Main PCB Assembly 5-6.
A2 Annunciator PCB Assembly 5-10

Federal Supply Codes for Manufacturers 5-12

A8I Model Numbers and Input Power 6-6

8026B

List of illustrations

FIGURE TITLE PAGE

I-I. Removing the Battery Cover 1-3
I-2. Battery Removal 1-4
1-3. Controls, Indicators and Connectors 1-5

2-1.

Volts Operation 2-5

2-2.

Current Operation 2-6

2-3.

Resistance Operation 2-7

2-4.

Conductance Operation 2-8
2-5. Continuity Operation 2-9
2-6.

Waveform Conversion 2-11
2-7.

Voltage Measurement Error Calculations 2-12
2-8. Current Measurement Error Calculations 2-14
2-9. Conductance-to-Resistance Conversion 2-17
2-10. Transistor Beta Test Fixture 2-18
3-1.

Model 8026B Simplified Block Diagram 3-3
3-2. Dual Slope A/ D Converter 3-4
3-3. Input Signal Conditioners 3-8

4-1.

Calibration Adjustment Locations 4-3
4-2.

LCD Display Assembly 4-4

5-1.

8026B Final Assembly 5-5
5-2. Al Main PCB Assembly 5-9
5-3. A2 Annunciator PCB Assembly 5-11
6-1.

8026B Accessories 6-2

v/v;

8026B

Section 1

Introduction and Specifications

1-1.

INTRODUCTION

1-2. Your John Fluke Model 8026B is a pocket-size digital multimeter that is ideally
suited for application in the field, lab, shop or home. Some of the features of your
instrument are:

• All VOM functions plus conductance and continuity (8 in all) are included as
standard.

DC Voltage - 100 /iV to lOOOV
AC Vohage - IOO ^lV to 750V
DC Current - I /lA to 2000 mA
AC Current - 1 jiA to 2000 mA
Resistance - 0. in - 20 Mn
Diode Test
Conductance - O.I ns to 200 ns and .001 ms to 2 ms (S = Siemens = 1/n).
Continuity - Provides an immediate audible indication when continuity is
detected.

• True rms ac measurement for signals up to 10 kHz.

• CONDUCFANCE - Allows fast, accurate, noise-free resistance measurements up
to 10,000 Mn.

• An easy-to-read high contrast 3 1/2 digit liquid crystal display.

• Each range has: .

Full auto-polarity operafion
Overrange indication

Effective protection from overloads

• Dual slope integration measurement technique to ensure noise-free measurements.

• Easy calibration - few adjustments.

1-1

8026B

Lightweight - 369 grams (13 ounces).

Up to 200 hours of continuous operation can be expected from a single,
inexpensive, 9V, alkaline battery (transistor radio/calculator type).

Low battery voltage automatically detected and displayed.

Line operation is possible using a Model A81 Battery Eliminator (see Section 6.
Accessories).

Protected test leads - finger guards on the probes and shrouded contacts on the

connectors discourage accidental contact with circuit voltages.

A full line of accessories that extend the range and scope of your instrument.

1-3. PREPARING FOR OPERATION
1-4. Unpacking

1-5. Your 8026B was packed and shipped in an especially designed protective container.
This manual, the multimeter, one 9V battery, and two test leads (one red and one black)
should be packed in the shipping container. Check your shipment thoroughly. If anything
is wrong with your shipment, contact the place of purchase immediately. If satisfaction is
not obtained, contact the nearest John Fluke Service Center. A list of these service centers
is located at the end of this manual.

1-6. If reshipment is necessary, please use the original shipping container.
container is not available, a new one can be obtained from the John Fluke Mfg. Co., Inc.
Please state the instrument model number when requesting a new shipping container.

1-7. Battery and/or Fuse Installation/Replacement

1-8. Your 8026B is designed to operate on a single, inexpensive, 9V battery ofthe
transistor radio/calculator variety (NEDA 1604). When you receive your 8026B the
battery will not be installed in the DMM. Once the battery is installed, you can expect a
typical operating life of up to 2(X) hours with an alkaline battery or IOO hours with a
carbon-zinc battery. When the battery has exhausted about 80% of its useful life, the BT
indicator will appear in the upper left corner of the display. Your 8026B will operate
properly for at least 20 hours after BT appears. Use the following procedure to install or
replace the battery and to replace the fuse.

WARNING

TO AVOID ELECTRICAL SHOCK HAZARDS REMOVE THE INPUT SIGNAL
AND THE TEST LEADS FROM THE INPUT TERMINALS, AND SET THE
POWER SWITCH TO OFF BEFORE OPENING THE BATTERY
COMPARTMENT.

1.

Set the 8026B power switch to OFF.

2.

Remove the test leads from external circuit connections and from the 8026B

input terminals.

1-2

I f

the original

3.

Open the battery compartment on the bottom of the 8026B using the method

shown in Figure 1-1.

4.

Tilt the battery out as shown in Figure 1-2.

5.

If fuse Fl is to be replaced, use a pointed tool such as a probe tip or small
screwdriver to pry FT from its holder. Replace the defective fuse with fuse type
AGX2.

(Instruments that accomodate metric fuses use 5 x 20 mm 2A 250V type F.)

6. Disconnect the battery clip from the battery.

7.

Press the battery clip onto the replacement battery and return both to the
battery compartment.

8. Make sure the battery leads are routed by the broad side ofthe battery and fully
within the confines ofthe battery compartment before sliding the cover into place.

WARNING

DO NOT OPERATE THE 8026B UNTIL THE BATTERY COVER IS IN PLACE
AND FULLY CLOSED.

USE THUMBS TO PUSH
BATTERY COVER FROM
8026B CASE. INDEX
FINGERS SHOULD BE
USED TO PREVENT
COVER FROM
FLYING AWAY.

8026B

BACK SIDE OF 8026B

Figure 1-1. Removing the Battery Cover

1-3

8026B

\

lp^

/^

1

.••r

%^

'^v^i>

" . . .

1^

•^r>--j

:i;s:W

Figure 1-2. Battery Removal

1-9. PHYSICAL FEATURES

1-10. Before using your 8026B we suggest that you take a few minutes to get acquainted
with your instrument. All of the externally accessible physical features of the 8026B are
shown in Figure 1-3 and described in Table 1-1. Locate each feature on your 8026B as you

read the description.

1-11.

INITIAL CHECK-OUT PROCEDURE

1-12. Now that you have installed the battery, and know where everything is, let's make

sure the unit is working properly. We'll run through a simple check-out procedure, starting
with turn-on. No equipment other than the test leads will be required. If a problem is
encountered, please recheck the battery, fuses, switch settings, and test lead connections

before contacting your nearest authorized John Fluke Service Center.

NOTE

This

procedure is intendedto verify overall instrument operation, andisnot
meant as a substitute for the formal Performance Test given in Section 4.
Limits shown e.xceed the specifications because the procedure uses one

measurement to check another.

1.

Set the power switch to OFF and all range and function switches to the released

(out) position.

2.

Set the power switch to ON and observe the display. It should read 00.0 ±0.1.

3.

Connect the red test lead to thhe V/n input terminal.

4.

Touch the red probe tip to the COMMON input terminal, and sequentially
depress each of the six range switches starting at the top (20 Mn). The display
should read zero ±one digit and the decimal point should be positioned as follows:

1-4

8026B

a. 20M - 0.00

b.

2000k - 000

c. 200k - 00.0
d. 20k - 0.00
e. 2k - .000
f. 200 - 00.0

5.

Press the 20V range switch and remove the probe from the COMMON input

terminal.

6. Look inside of the battery eliminator connector on the right side of the 8026B
and locate the connector contacts (center post and side contact as shown in Figure

1-3).

7.

Touch the red probe lip to the center post of the battery eliminator connector.

The display should read approximately -6V dc.

8. Touch the probe tip to the side contact ofthe battery eliminator connector. The
display should read approximately 2.8V dc. Notice that the difference between the
two readings is equal to the battery vohage (typically 8V to 9V dc). Remove the
probe from the battery jack.

9-f

, I

non

[_l.tM«OW

'%

i^

8 7 6

Figure 1-3. Controls, Indicators and Connectors

...u

1-5

8026B

Table 1-1. 8026B Controls, Indicators and Connectors

ITEM

NO.

1

2

3

4

5

NAME

Display

Power Switch

Tilt Bail

Battery Eliminator
and Connector

Battery Compartment

and Cover

FUNCTION

A 3-1/2 digit display (1999 max, with
decimal point and minus polarity
indication,

met values, overrange conditions, and

a low battery condition.

A slide switch used to turn the
instrument off and on.

A removable fold-out stand which
allows the instrument to be either tilted
tor bench-top applications or hung

from a hook in the absence of a work

surface.

An external input power connector for
use with the Model A81 Battery

Eliminator accessory. (A81 is available
in a variety of voltage and plug
configurations. See Section 6.)

Cover for the 9V battery and the
current-protection fuse. Refer to figure
1-1 for battery cover removal
instructions.

used to indicate measure-

1-6

6

7

8

V/n/S Input Connector

COMMON Input
Connector

mA Input Connector

Protected test lead connector used as
the high Input for all voltage,

resistance, continuity and conduc­tance measurements. Will accept
banana plugs.

Protected test lead used as the low or
common input for all measurements.
Will accept banana plugs

Protected test lead connector used as
the high input for all current

measurements Will accept banana

plugs.

Table 1-1. 8026B Controls, Indicators and Connectors (cont)

ITEM

NO.

NAME

FUNCTION

8026B

10

mA,'V-0/S Switch

Range Switches

A push-push switch (push on - push
off, do not pull to select function)
which is operated in conjunction with
the high input connectors to select
either the mA/V or Q (conductance)
measurement functions. When the
switch is in or depressed O is selected.
The mA or V function is selected in the
out position depending upon the
location of the high input

Interlocked push-button switches for
selecting ranges; i.e., press the desired
range switch to select that range and
cancel previous switch depressions.
Do not pull the switches to select a
range.

Voltage: 200 mV, 2V, 20V, 200V

1000V dc/750V ac

Current: 2 mA, 20 mA. 200 mA.

2000 mA

Resistance: 2000. 2 kO, 20 kO. 200

kO.

Conductance: 100 nS or 2 mS (S =

Siemens = 1/0 =
international unit of
conductance).
ductance requires
simultaneous depres­sion of two range
switches.

lead.

2000 kO. 20 MO

Con-

DC/AC/ I))) Switch

A push-push switch (push on - push
off. do not pull to select function) used
to select the ac or dc measurement
function when measuring current or
voltage. When in, or depressed, the ac
function is selected. Output selects dc.
When used with the O or S functions,
the in position enables the audible
continuity tone.

1-7

8026B

9. Depress the lower function button (n) and sequentially depress each of the six
range switches. The display should read I as the most significant digit with no other
numbers shown. This is the standard overrange indication. Notice that the decimal
point changes position with the range switch settings just as it did in step 4 of this
procedure.

10.

Touch the red probe tip to the COMMON input terminal, and sequentially

press each of the range buttons. The display should read zero at each range setting.

Lead resistance may be sufficient to cause one or two tenths

(0.1

or 0.2n) indication

on the 200n range.

11.

Touch the red probe tip to the mA input connector and press the 200n switch.

The display should read 99.0 to lOI.O.

12.

Press the 2 kn switch. The display should read .099 to.

101.

Remove the probe

from the mA input connector.

13.

Simultaneously depress the 2000 kn and the 20 Mn range switches. This
selects the 200 nS range. The display should read 00.0 to OI.O (minimum
conductance, maximum resistance).

14.

Touch the red probe tip to the COMMON input connector. An overrange

indication should be displayed since conductance is the reciprocal of resistance.

15.

Connect the black test lead to the COMMON input connector.

16.

Depress both AC/ DC switch and the 750V ac range switch. Set the mA/ V-n

switch to the voltage (out) position.

WARNING

THE LOCAL LINE VOLTAGE IS MEASURED IN THE FOLLOWING STEP. BE
CAREFUL NOT TO TOUCH THE PROBE TIPS WITH YOUR FINGERS, OR TO
ALLOW THE PROBE TIPS TO CONTACT EACH OTHER.

17.

Measure the local ac line voltage at a convenient output receptacle. The

voltage should be displayed with I volt resolution.

18.

If the 8026B has responded properly to this point, it is operational and ready

for use.

1-13. ACCESSORIES

I-14. Table 1-2 lists the accessories available for use with the Model 8026B. Detailed

information about each accessory is provided in Section 6.

1-15. SPECIFICATIONS

I-16. Table 1-3 lists the 8026B specifications.

1-8

ACCESSORY

Table 1

-2.

8026B Accessories

8026B

DESCRIPTION

A81
C-90
80T-150C
80T-150F
801-600
80K-6
80K-40
80J-10
83RF
85RF
Y8100
Y8101
Y8132
Y8134
Y8140

Table 1-3. 8026B Specifications

The following specifications assume a
operating temperature of
to 80% unless otherwise noted.

FUNCTIONS

DC VOLTS

RANGE

±200 mV

±2V

±20V

±200V
± 1000V

18°

C to 28° C (64° F to 82°

DC Volts, AC Volts, DC Current, AC
Current, Resistance, Conductance, and
Continuity.

RESOLUTION

lOO^V
1 mV
10 mV
100 mV
IV

Battery Eliminator

Vinyl Carrying Case
Temperature Probe °C
Temperature Probe °F
Current Transtormer 2" jaws
High Voltage Probe
High Voltage Probe
Current Shunt
High Frequency Probe
High Frequency Probe
AC/DC Current Probe
Current Transformer 7/16" jaws
Safety Designed Test Lead Set
Deluxe Test Lead Set
Slim Flex Test Lead Set

1-year

calibration cycle and an

F)

at a relative humidity up

ACCURACY

±(0.1%

of reading -1-1 digit)

Overvoltage Protection 1000V dc or peak ac on all ranges.
Input Impedance 10 MO, all ranges.

Normal Mode Rejection Ratio >60 dB at 50 Hz and 60 Hz.
Common Mode Rejection
Ratio (1 kO unbalance) >100 dB at dc, 50 Hz and 60 Hz.

Response Time Less than one second.

1-9

8026B

Table 1-3. 8026B Specifications (cont)

AC VOLTS (True RMS, AC-Coupled)

ACCURACY*

RANGE

200 mV
2V
20V

200V
750V

'Applicable from 5% of range to full range.

Overioad Protection 750V rms or 1000V peak continuous, except

Common Mode Rejection
Ratio (1 kO unbalance) >60 dB at 50 Hz and 60 Hz.
Voll-Hz Product IxW maximum (for example, 200V @ 5 kHz).
Input Impedance 10 MO In parallel with <100 pF.

Crest Factor 3:1

DC CURRENT

RESOLUTION

100

A/V
1 mV
10 mV

0.1V
IV

45 Hz

to 1 kHz

±(0.5%

1 kHz 2 kHz

to 2 kHz to 5 kHz

+ 2 digits)

±(1%

-I-

2 digits)

±(1%

-F 3 digits)

ywitW^^0&^;:-xM
:mmmB

200 mV ac ranges (15 seconds maximum
above 300V rms ac).

5 kHz

to 10 kHz
±(2%

-F 3 digits)

mmm-

RANGE

2 mA
20 mA
200 mA
2000 mA

Overioad Protection

AC CURRENT

RANGE
2 mA

20 mA
200 mA

2000 mA
'Applicable from 5% of range to full range.
Overioad Protection 2A/250V fuse, in series with a 3A/600V fuse.

Crest Factor 3:1

1-10

RESOLUTION

1 pA

10

M

100A(A

1 mA

RESOLUTION

1 pA
10

A/A
100/yA
1 mA

ACCURACY

±(0.75%
+ 1 digit)

45 Hz to 450 Hz
±(3%

±(1.5%

of reading

2A/250V fuse, in series with a 3A/600V fuse.

ACCURACY-

450 Hz tol kHz

rdg +2 d)

jNpt Specjfie^

of reading -t-2 digits)

BURDEN

VOLTAGE

0.3V max.

0.9V max.

BURDEN
VOLTAGE

0.3V rms max

0.9V rms max

RESISTANCE

RANGE

200n

RESOLUTION

2kn-w-

20 kO
200 kO

2000 kO
20 MO

Table 1-3. 8026B Specifications (cont)

ACCURACY

0.1O

±(0.2%

of reading 1-3 digits)

in

±(0.1%

ion

of reading +^ digit)

loon

1 kn
10 kn

:v(2%

of reading * i digit)

FULL-

SCALE

VOLTAGE

<0.25V
>1.0V
<0.25V

>0.7V
<0.25V

>.7V

8026B

MAXIMUM

TEST

CURRENT

.35 mA

1.1 mA

13/JA

13A(A

0.13/iA

0.13

A/A

Overioad Protection

Open Circuit Voltage
Diode Test (Hi-Lo Ottms)

CONDUCTANCE

RANGE

2 mS

200 nS

Overioad Protection .

Open Circuit Voltage

Diode Test

CONTINUITY (for Passive Circuit Testing)

Ranges All resistance ranges. (2 kn range

Indication

CONTINUITY Audible tone
OPEN CIRCUIT No audible tone

500V dc rms ac on all ranges. 15 seconds
maximum above 3(X) volts.

Less than 1.5V on all ranges except 2 kn
range is less than 3.5V.
2 kn, 200 kn, and 20 Mn ranges supply
enough voltage to turn on junctions

allowing a "Diode Test". The 2 kn range is
preferred and is marked with a diode

symbol.

200n, 20 kn, and 2000 kn ranges

can make in-circuit measurements without

turning on silicon junctions.

ACCURACY

±(0.2%

of reading fl digit)

±(2.0%

of reading +10 digits)

500V dc/rms ac on all ranges. 15 seconds

max. above 300V.
2 mS <3.5V
200 nS <1.5V

Both ranges will forward bias a typical PN

junction.

recommeded for lowest resistance

threshold)

1-11

8026B

Response Time

Overioad Protection

Table 1-3. 8026B Specifications (cont)

50 ps (Minimum duration of continuity or
open to toggle audible tone) on 2 kO range.
Pulse stretcher holds tone on or off for
approximately 200 ms.

. 500V dc/rms ac on all ranges.

GENERAL

Maximum Common Mode
Voltage
Power Requirements

BATTERY LIFE

Carbon Zinc

BATTERY INDICATOR ..

DisDiav

Size

Weight

ENVIRONMENTAL

Temperature

Relative Humidity

Temperature Coefficient ..

. Relates solely to insulation or grounding

properties defined in lEC 348.

. 500V dc/rms ac.

.. Single 9V battery, NEDA 1604.

.. 200 hours typical.
.. 100 hours typical.

"BT"

on display illuminates when

approximately 20% of battery life remains.

.. 3% digit LCD (2,000 count), autozero,

autopolarity.

.. L X W X H: 18.0 cm x 8.6 cm x 4.5 cm

(7.1 in X 3.4 in x 1.8 in)

.. 0.37 kg. (13 oz)

.. 0°C to 50°C (32° F to 122°F) operating.

-35°C to +60°C (-31 °F to 140°F) storage.

.. 0 to 80%, 0°C to 35°C, 0 to 70%, 35°C to

50° C

(95-122° F)

.. <0.1 times the applicable accuracy

specification per °C for 0°C to 18°C and
28°C to 50°C (32°F to64.4°F and 50.4°F to
122°F).

1-12

8026B

Section 2

Operating Instructions

2-1.

INTRODUCTION

2-2.

To fully use the measurement capabilities of your 8026B, a basic understanding of
its measurement techniques and limitations is required. This section of the manual
provides that infonnation. plus a few applications that may prove useful. For example, did
you know your 8026B will provide direct-reading dc current gain (beta) measurements for
both N PN and PN P transistors? Read this section ofthe manual, to find out how it's done.

2-3.

INPUT POWER

2-4.

Battery Life

2-5.

The 8026B is designed to operate on an single, inexpensive 9V battery of the
transistor radio/calulator variety (NEDA 1604). If an alkaline battery is used, a typical
operating life of up to 200 hours can be expected. Carbon-zinc batteries will have a useful
life of up to 100 hours, in either event, the 8026B will display a Bl (in upper, left-hand
corner) when the battery has exhausted approximately 80% of
appears, the battery is capable of properly operating the 8026B for at least another 20
hours.

its

useful life. When Bl first

CAUTION

To ensure multimeter operation within the accuracy specifications, the tiattery
should t>e replaced when the voltage measured at the center of the tiattery
eliminator connector falls below -3.00 volts (with respect to the COMMON
Input). It the battery voltage falls to a point where the"BT" is displayed and the
digital display Is Inactive or no longer responds to an Input signal, the battery
should be replaced Immediately to prevent damage to the LCD.

2-6.

Line Power Operation

2-7.

You can operate your 8026B from line power by using the A81 Battery Eliminator

Accessory. Refer to Section 6 for additional information about the A8I.

2>8.

OPERATING NOTES

2-9.

The following paragraphs will familiarize you with the capabilities and limitations

of your Model 8026B and instruct you in routine operator maintenance.

2-1

8026B

2-10. Input Overload Protection

CAUTION

Exceeding the maximum Inpul overload limits can damage your Instrument.
transient overload protection circuit
against short duration high energy pulses.
protection
pulses, and about 0.6 watts average
rate pulses, such
components;
replacement,
flameproof fusible resistor. Use exact replacement

2-11.

Each measurement function and its associated ranges are equipped with input

to

approximatly iWe pulses

as
RJ1 - RJ4, Rl and R2. If any of
use

those Irom

only Fluke parts

Is

designed Into

The

per

lor

lower amplitude

a TV set, can

to

ensure product safety.

components used limit

second

for 6 KV, 10

damage

these components require

to

the

8026B

to

microsecond

pulses.

Fast repetition

the

protection

(R2 Is a

ensure safety.)

protect

the

special

overload protection. The overload limits for each function and range are given

1.

Table 2-1. Input Overload Limits

SELECTED
FUNCTION

Voltage

SELECTED

RANGE

200

mV, 2V,

20V, 200V.
750V

ac,

1000V

dc

INPUT

CONNECTIONS

V/n/S and

'

COMMON

MAX. INPUT
OVERLOAD

10OOV dc

or

peak ac on
dc ranges. 1000V dcor
750V rms on

ac
15 seconds
above 300V on 200 mV

ac range.

Current

2 mA, 20 mA,
200 mA,
2000

mA

mA and
COMMON

2A and 500V dc/rms ac
max. Fuse-protected
byFI (2A, 250V) in cir­cuits with open circuit
voltage

^50V

ac. Fuse

F2

(3A, 600V)

provides protection
from niisuse — open
circuit voltage C600V

dc/rms

ac.

Resistance

Conductance,

or

Continuity

200n, 2 kn,
kn,

200 kn,
2000 kn,
200 nS,

20 Mn,

2 mS

20

V/n/S

and

COMMON

500V

dc or rms ac. 15
seconds maximum
above 300 volts.

A

It

in

Table

range

max.

dc/rms

2-

-

2-2

ANY

ANY

COMMON

500V dc/rms
with respect

to

earth ground.

ac

8026B

2-12.

Input Connections to COMMON

WARNING

TO AVOID ELECTRICAL SHOCK AND /OR INSTRUMENT DAMAGE DO
NOT CONNECT THE COMMON INPUT TERMINAL TO ANY SOURCE OF
MORE THAN 500 VOLTS DC OR RMS AC ABOVE EARTH GROUND.

2-13.

The 8026B may be operated with the COM MON input terminal at a potential of up
to 500V dc or 500V rms ac above earth ground, if this limit is exceeded, instrument
damage may occur. This, in turn, may result in a safety hazard for the operator.

2-14. Fuse Check

2-15.

The current (mA) function contains two fuses. Check them as follows:

1.

Complete the set up steps for the RESISTANCE (n) function and select the 2

kn range.

2.

Touch the red test probe to the mA input jack so that the V-n input and m.A

input are connected together.

3.

If the display reads approximately .100 kn, both fuses are good.

4.

If the display reads overrange (a I followed by blank digits), one or both fuses

need replacement. See the following paragraph for replacement instructions.

2-16. Fuse Replacement

2-17.

All ac and dc current ranges are fuse protected. Two series fuses are used:

1.

FI, 2A@ 250V, replaceable at the battery compartment (see section 1 "Battery

or Fuse Installation/Replacement").

2.

F2, 3A@ 600V backup fuse (see section 4, Battery/Backup Fuse

Replacement).

2-18. The Display

2-19. The Front Panel Display on your 8026B is a 3-1/2 digit Liquid Crystal Display.
The 1/2 digit is the extreme left digit location. So, the displayed value can range from000
through 1999. For convenience, in discussion, the 1999 is rounded to 2000. The decimal
point position is determined by selected range and is not affected by the measurement
function selected. Polarity, on the other hand is only used for the dc voltage and current
measurement functions. A minus sign indicates that the input signal is negative with
respect to the COMMON input terminal. Positive inputs are indicated by the absence of
the minus sign.

NOTE

The minus sign (-) may flash momentarily as the 8026 B comes out of an
overrange condition. This will most likely be seen in the ohms mode as the
open circuit lest leads are applied to an in-range resistance value. If the
minus sign remains on for in-range ohms readings, the circuit is live (a

negative voltage
etc.),

and incorrect resistance readings will he observed.

is

pre.sent at the input terminals due to charged capacitors,

2-3

8026B

2-20. The Display has two abnormal status indicators, one for low battery power and
one for instrument overrange. A "BT" is displayed when approximately 80% of the
battery's life is exhausted (battery replacement is indicated). And, a "I" followed by three
blanked digits is displayed (decimal point may be present) as an overrange indication. This

does not necessarily mean that the instrument is being exposed to a damaging input

condition. For example, when measuring resistance an open-input will cause an overrange
indication.

NOTE

When the 8026B is powered with the A8I Battery Eliminator the "BV

indicator may come on. However, instrument operation will he normal.

2-21.

1'he liquid crystal display used in the 8026B is a rugged and reliable unit which will

give years of satisfactory service. Display life can be extended by observing the following

practices:

1.

Protect the display from extended exposure to bright sunlight.

2.

Keep the voltmeter out of high temperature, high humidity environments, such

as,

the dash of a car on a hot, sunny day. Otherwise, the display may temporarily

turn black. Recovery occurs at normal operating temperature.

3.

Note that the display operation may be slowed in extremely low temperature

environments. No damage will occur to the LCD, but response time is greatly

increased. Recovery occurs at normal operating temperature.

2-22.

OPERATION

2-23.

The five figures, 2-1 through 2-5, each illustrate one ofthe measurement functions
ofthe Model 8026B. Each figure has two parts. The top part shows your 8026B as it should
look when ready to perform that type of nieasurement. The bottom part ofthe figure lists,
in sequential order, the steps you should perform to make that type of measurement with
your 8026B. To operate your 8026B turn to the operation figure corresponding to the
measurement function desired and perform the steps listed in the figure. Operate the
Model 8026B in accordance with the Input Overload Protection and the Input
Connections to COMMON portions of the Operating Notes presented earlier in this
section.

2-24. MEASUREMENT TECHNIQUES

2-25.

The following paragraphs offer you techniques that improve the measurement
accuracy of your 8026B. While these techniques are in general use throughout the
electronics industry, these paragraphs offer specifiee information for use with your 8026B.

2-26. AC Measurement

2-27.

The 8026B employs a true rms ac converter for ac signal measurements. The true
rms value of an ac signal may be defined as the equivalent dc value that dissipates the same
amount of heat in a resistor as the relative ac signal. Consider the following example: a
light bulb is energized with an ac signal and the brightness is measured. The ac source is
then removed from the light bulb and replaced by a variable dc source. The level of the dc
signal is adjusted so that the brightness of the light bulb is the same as it was for the ac
signal. This dc level is equivalent to the rms value of the ac signal. This cumbersome
method is not practical for handheld multimeters, so an active log-antilog analog
computation is continuously performed on the input signal.

2-4

VOLTS (V)

OUT FOR DC

(IN FOR AC)

IN FOR 20V
RANGE

OUT FOR V
FUNCTION

*NOTE: The function switches are push-push type. Do not pull them to the out

position.

• Connect the test leads as shown above.

• Depress the switch beside the range desired (20V is shown selected).

• Set the AC/DC switch out for DC or in For AC (DC is shown selected).

8026B

• Ensure that all other switches are at the out or off positions.

WARNING

TO AVOID ELECTRICAL SHOCK AND/OR INSTRUMENT DAMAGE, DO
NOT CONNECT THE 8026B TERMINALS TO SOURCES THAT EXCEED THE
FOLLOWING LIMITS WHEN MEASURING VOLTAGES:

COMMON:

V-n-S:
TERMINAL (INTHE AC FUNCTION, 200 mV RANGE, SOURCES GREATER

THAN 300V DC OR RMS AC SHOULD NOT BE CONNECTED LONGER THAN

IS SECONDS).

• Connect the test leads to the circuit being measured.

• Read the measured value on the display. The minus sign will appear if
the V-n-S terminal is negative with respect to the COMMON terminal.

500V DC OR RMS AC WITH RESPECT TO EARTH GROUND.

lOOOV DC OR 750V RMS AC WITH RESPECT TO THE COMMON

Figure 2-1. Volts Operation

2-5

8026B

CURRENT (inA)

OUT FOR DC

(IN FOR AC)

IN FOR
RANGE

OUT FO
FUNCTION

*NOTE:

The

position.

• Connect the test leads as shown.

• Depress the switch beside the range desired (20 mA range shown

• Set the AC/DC switch out for DC or in for AC.

• Ensure that all other switches are at the out or off positions.

function switches are push-push type. Do not pull them to the out

selected).

WARNING

TO AVOID ELECTRICAL SHOCK AND/OR INSTRUMENT DAMAGE, DO

NOT

CONNECT

FOLLOWING LIMITS WHEN MEASURING CURRENT:

COMMON:
mA:

CURRENT

AC.

DO NOT ATTEMPT CURRENT MEASUREMENT WHERE THE POTEN­TIAL IS GREATER THAN
GROUND.

• Connect the test leads to the circuit being measured.

• Read the measured value on the display. In DC the minus sign will
appear if the mA terminal Is negative with respect to the COMMON
terminal.
this section.

2-6

THE 8026B

SOOV

DC OR RMS AC WITH RESPECT TO EARTH GROUND.

OF 2

If unit falls to read properly, see Fuse Check located earlier in

TERMINALS

AMPS

OR OPEN

SOOV

DC OR

Figure 2-2. Current Operation

TO SOURCES THAT EXCEED

CIRCUIT VOLTAGE

RMS

AC WITH RESPECT

OF 6(X)V

TO

DC/RMS
EARTH

THE

RESISTANCE (Q) /<\

IN FOR 20 kn

RANGE

IN FOR n
FUNCTION

*NOTE: The function switches are push-push type. Do not pull them to the out

position.

• Connect the test leads as shown.

• Depress the mA-V-O-S switch.

• Depress the switch beside the range desired (20k is shown selected).

8026B

• Ensure that all other switches are at the out or off positions.

• Make sure that the device being measured contains no electrical energy.

WARNING

TO AVOID ELECTRICAL SHOCK AND/OR INSTRUMENT DAMAGE, DO
NOT CONNECT THE 8026B TERMINALS TO SOURCES THAT EXCEED THE
FOLLOWING LIMITS WHEN MEASURING RESISTANCE OR CONTINUITY:

COMMON:

V-n-S:
(15 SECONDS MAXIMUM ABOVE SOOV.)

• Connect the test leads across the device being measured.

• Read the measured value on the display.

SOOV DC OR RMS AC WITH RESPECT TO EARTH GROUND.

SOOV DC OR RMS AC WITH RESPECT TO THE COMMON TERMINAL.

Figure 2-3. Resistance Operation

2-7

8026B

CONDUCTANCE (S)

DEPRESS BOTH AT THE
SAME TIME FOR 200 nS
RANGE

IN FOR S —
FUNCTION

*NOTE: The function switches are push-push type. Do not pull them to the out

position.

Connect the test leads as shown.

Depress the mA-V-O-S function switch.

AT THE SAME TIME, depress both of the range switches.

(The 200 nS range is shown selected.)

Ensure that all other switches are at the out or OFF
positions.

Ensure that the device being measured contains no
electrical energy.

WARNING

TO AVOID ELECTRICAL SHOCK AND/OR INSTRUMENT DAMAGE, DO
NOT CONNECT
FOLLOWING LIMITS WHEN MEASURING VOLTAGES:

THE 8026B

TERMINALS

TO SOURCES

THAT

EXCEED

THE

COMMON:

V-O-S:
(15 SEC MAX ABOVE SOOV.)

Connect the test leads across the device being measured.
Read the measured value in the display.

See Measurement Techniques section for Conductance-Resistance
Conversion chart.

2-8

SOOV

SOOV

DC OR RMS AC WITH RESPECT TO EARTH GROUND.

DC

OR RMS AC WITH RESPECT TO THE COMMON

Figure 2-4. Conductance Operation

TERMINAL.

CONTINUITY

IN FOR
AUDIBLE TONE

IN FOR 2 kn FUNCTION

IN FOR n FUNCTION

*NOTE:

The

position.

• Connect the test leads as shown.

• Depress the mA-V-n-S function switch.

• Depress the 2 kn range switch.

function switches are push-push type. Do not pull them to the out

8026B

• Depress the AC/DC function switch.

• Ensure that all other switches are at the out position.

• Ensure that the device being measured contains no
electrical energy.

WARNING

TO AVOID ELECTRICAL SHOCK AND/OR INSTRUMENT DAMAGE, DO
NOT

CONNECT

FOLLOWING LIMITS WHEN MEASURING CONDUCTANCE:

COMMON:
V-n-S:

SOOV DC OR RMS AC WITH RESPECT TO THE COMMON

(15 SEC MAX ABOVE SOOV.)

• Connect the leads to the circuit being measured.

• Continuity between the test leads will cause the audible tone to sound.

THE 6026B

SOOV

DC OR RMS AC WITH RESPECT TO EARTH GROUND.

Figure 2-5. Continuity Operation

TERMINALS

TO SOURCES

THAT

EXCEED THE

TERMINAL.

2-9

8026B

2-28.

It should be noted that accurate measurements can only be guaranteed for ac input

signals that have some reasonable limits with regard to the frequency and shape ofthe

waveform. To help define what these reasonable limits are. a parameter known as "crest
factor" has been developed. Crest factor is defined as the peak signal value divided by the
rms value of the signal (with any dc component removed). Forexample, the crest factor of
a

10%

duty-cycle rectangular pulse train is 3.16, and the crest factor of a sine wave is 1.41.

2-29. It should also be noted that signals with high crest factors usually have wide

bandwidth requirements which may be near the specified frequency limits for the selected
range. Both crest factor and frequency response should be carefully considered when

evaluating reading accuracies. Refer to Section 1 for the 8026B specifications for ac

measurements.

2-30. Most analog and digital multimeters use average-responding ac converters. The
gain in an average-responding ac converter is adjusted so that the multimeter measures
sinusoidal signals correctly. However, if a signal is not perfectly sinusoidal, the multimeter
with the average-responding ac converter will not measure the signal correctly. Figure 2-6
shows how the 8026B readings compare with average-responding multimeter readings for

seven common waveforms.

2-31.

You can also use the values in Figure 2-6 to calculate other waveform parameters
from readings displayed on the 8026B. For example, if a rectified full wave sine wave is
being measured and the 8026B displays the value 0.435 (V ac). then the pk-pk vohage
would be

1.414V

(the same as the 0-pk voltage). The dc component would be 0.900V (this

could be verified by switching to the dc volts function). For another example, suppose the

8026B measures a rectified half wave sine wave and displays the value 1.000
pk or 0-pk voltage would be

1 OOOV

x (2.000

-=-

0.771) = 2.594V. The dc component would

(V

ac). The pk-

be l.tXWV X (0.636 -r 0.771) = 0.825V. For this same signal, an average-responding
multimeter would measure I.OOOV x (0.764 -=- 0.771) = 0.991V, an error of 0.9%.

2-32.

Voltage AC/DC

2-33.

The 8026B is equipped with five ac and five dc voltage ranges; 200 mV, 2V, 20V,

2(X)V. 750V ac/

ICMXIV

dc. All ranges present an input resistance of 10 Mil shunted by less
than IOO pF. When making measurements, be careful not to exceed the overload limits
given earlier in lable 2-1.

2-34. Measurement errors, due to circuit loading, can result when making either ac or dc
voltage measurements on circuits with high source resistance. However, in most cases the
error is negligible «0.1%) as long as the source resistance of the measurement circuit is 10
kn or less. If circuit loading does present a problem, the percentage of error can be
calculated using the appropriate formula in Figure 2-7.

2-35. Current AC/DC

WARNING

WHEN MEASURING CURRENT, DO NOT EXCEED THE
MAXIMUM COMMON MODE VOLTAGE SPECIFICATION FOR THE

INSTRUMENT. THE OPERATOR IS PROTECTED FROM POSSIBLE INJURY
AND THE INSTRUMENT IS PROTECTED FROM POSSIBLE DAMAGE BY A
250V FUSE IN SERIES WITH A SOOV FUSE.

2-10

SOOV

DCOR RMS AC

8026B

AC-COUPLED

INPUT

WAVEFORM

SINE

PK

1

RECTIFIED SINE
(FULLWAVEI

RECTIFIED SINE
(HALF WAVEl

^/\/\p^K

SQUARE

O' . PK PK

RECTIFIED
SQUARE

PK PK-i

RECTANGULAR

PULSt

"^r^ rn +

-M Y U- t

D - X, Y

K Vl3 - D'
TRIANGLE
SAWTOOTH

PK

0^^ PK^K

PEAK VOLTAGES

PK-PK

2

8?8

1

414

2.000

2000

1

414

2.000

3464

0-PK

1.414

1

414

2 000

1.000

1.414

2.000

1.732

DISPLAY HtADINGS

AC COMPONENT ONLY

RMS CAL

AVE SENSING

1

0.421

0 764

1111

0.786

2 22IK

0.960

RMS SENSING

000

(80268)

1.000

0 435

0 771

1.000

0.707

2K

1.000

DC

COMPONENT

ONLY

0 000

0 900

0 636

0.000

0.707

2D

0000

DC AND AC

TOTAL RMS

TRUE RMS =

\''ac' • dc

=

1.000

1

000

1.000

1.000

1.000

2\^

1

000

NOTE:

High Frequency waveforms with fairly abrupt transitions (such as a

5 kHz pulse with a 10% duty cycle) have spectral components that are

beyond the specified frequency limits for the selected range. Be sure to take

this into account when evaluating measurements.

Figure 2-6. Waveform Conversion

2-11

8026B

1.

DC VOLTAGE MEASUREMENTS

Loading Error in % = 100 x Rs^ (Rs + 10')

Where: Rs = Source resistance in ohms of circuit

2.

AC VOLTAGE MEASUREMENTS

First, determine input impedance, as follows:

Zin

Where: Zin — effective input impedance
Rin = 10' ohms
Cin = 100 X 10-" Farads

F = frequency in Hz

Then,

determine source loading error as follows:

being measured.

lO:

v/l + (2n F 'Rin'O'

Loading Error in %

Where: Zs = source impedance
Zin = input impedance (calculated)

"Vector algebra required

Figure 2-7. Voltage Measurement Error Calculations

2-36. Four ac and four dc current ranges are included on the 8026B; 2 mA, 20 mA, 200
mA, and 2000 mA: Each range is diode protected to 2 amps and fuse protected above 2
amps.

If either fuse blows, refer to fuse replacement information given earlier in this

section.

2-37.

In high elearical noise environments (near ignition switches, fiourescent lights,
relay switches, etc.) unstable or erroneous readings (exceeding specifications) may occur.
The effect is most obvious when measuring low level current on the 2 mA range. If an

2-12

100 xZs

Zs + Zin

8026B

erratic or erroneous reading is suspected, temporarily jumper the V/n connector to the

mA connector. This is recommended for the 2 mA and 20 mA ranges only.

CAUTION

To avoid pos8lt>le Instrument damage and/or erroneous measurements
remove the temporary V/O-to-mA jumper l>efore attempting voltage or
resistance measurements.

2-38.

Full-scale burden voltage (voltage drop across the fuse and current shunt) for all
ranges except 2000 mA is less than 300 mV. The 2000 mA range has a full-scale burden
voltage of less than 900 mV. These voltage drops can affect the accuracy of a current
measurement, if the current source is unregulated and the shunt plus fuse resistance
represents a significant portion (l/IOOO or more) of the source resistance. If burden
voltage does present a problem, the percentage of error can be calculated using the
formula in Figure 2-8. This error can be minimized by using the highest current range that

gives the necessary resolution. For example, if 20 mA is measured on the 2000 mA range

the burden voltage is approximately 5 mV.

2-39. Resistance

2-40. Six direct reading resistance scales are provided on the 8026B: 20 Mn, 2000 kn,
200 kn, 20 kn, 2 kn and 200n. All scales employ a two-wire measurement technique. As a
result, test lead resistance may influence measurement accuracy on the 200n range. To
determine the error, short the test leads together and read the lead resistance. Correct the
measurement by subtracting the lead resistance from the measurement reading. The error
is generally on the order of 0.2 to 0.3 ohms for a standard pair of test leads.

2-41.

In-circuit resistance measurements can be made using the 200n, 20 kfl and 2000
kn ranges. The full scale measurement voltage produced on these ranges is not sufficient
to forward bias silicon diode/ emitter-base junctions, and thus, enables resistance values to
be measured without removing diodes and transistors from the circuit. Conversely, the 2
kn, 200 kn, and 20 Mn ranges produce a measurement voltage sufficient to forward bias a
P-N junction. These ranges enable both diode- and transistor-junction checks to be made

conveniently. Full scale voltage and short circuit current for each resistance range is given

in Table 2-2. All values shown are referenced to the COMMON input terminal; i.e., the
V/n/S terminal is positive.

NOTE

A

ny change (greater than one or two digits) in apparent resistance when test

leads are reversed may indicate either the presence of a diode junction or a

voltage in the circuit.

CAUTION

Tum test circuit power off and discharge all capacitors before attempting In­clrcult resistance measurements.

2-13

8026B

Es-r-

Es = Source voltage
RL

= Load resistance + Source resistance

1^

= Measured current (display reading in mA)

EB

= Burden voltage (calculated), i.e.. Display reading

expressed asa%offull-scale(100x

FULL-SCALE

^

times full-scale burden voltage for selected range. See
Table.

RANGE

2 mA to 200 mA
2000 mA

MAXIMUM

BURDEN VOLTAGE

0.3V

0.9V

Maximum current error due to Burden Voltage:

Error in %

Error in mA

= 100

EBX'M

Es -EB

X

=B

ES-EB

Example: Es = 14V, RL = 90, I^/I = 1497 mA,

Eg = 100

1497

X 0.9 (from Table)

2000

749% X 0.9 ^ 0.674V

Error in % = 100

.674

14-674 ' 13.326

100

.674

5.06%

Increase displayed current by 5.06% to obtain true current.

2-14

Error in mA

_ .674 X 1497 1009

14 - .674 13.326

76 mA

Increase displayed current by 76 mA to obtain true current.

Figure 2-8. Current Measurement Error Calculations

Table 2-2. Voltage/Current Capability of Resistance Ranges

RANGE

FULL-SCALE

VOLTAGE (TYPICAL)

SHORT CIRCUIT

CURRENT (TYPICAL)

8026B

20 Mn
2000 kn
200 kn
20 kn
2kn-w­2oon

2-42. Three of the 8026B resistance ranges have a high enough open-circuit voltage to

turn on a silicon junction. These ranges (2 kn. 200 kn, and 20 Mn) can be used to check

silicon diodes and transistors. The 2 kn range is preferred for this function and is marked
with a diode symbol. The open-circuit voltage of the three alternate ranges (200n, 2 kn,
and 2 Mn) is not high enough to turn on a silicon junction. Use these three ranges to make

in-circuit resistance measurements. For all resistance ranges, the V/n/S input terminal is

positive with respect to the COMMON input terminal.

2-43. Continuity

2-44. Audibly confirmed continuity measurements may be made using any of the
resistance or conductance ranges. The 2 kn range is recommended for this mode since it

provides the lowest resistance threshold, approximately 110 ohms. On this range a

measured resistance lower than 110 ohms initiates the audible tone. To determine the
exact threshold, use a variable resistor and observe the display reading at which the tone
switches on and/ or off. Note that in this mode resistance or conductance readings are also
displayed. However, high resistance ranges and the 200 nS range may exhibit noisy or
drifting readings due to ambient signal noise.

2-45.

Intermittent open or short circuits with a duration of at least 50

the 2 kn range. A continuously intermittent connection is heard as a series of beeps. A
series of beeps (due to environmental noise) is also encountered when a measurement is

near the threshold of the selected range. The approximate thresholds for the continuity

ranges are as follows:

+800 mV
+200 mV

+800 mV
+200 mV
+ 1.1V

+55 mV

+0.12

A/A

+0.12

AiA

+ 12AiA

+^2^^

+ 1.0 mA

+0.3 mA

jus

are detectable in

RANGE
200 nS

2mS
20 MO
2000 kn
200 kn
20 kn
2kn
20on

THRESHOLD
900 kilohms

110 ohms
900 kilohms
900 kilohms

9 kilohms
9 kilohms
110 ohms
360 ohms

2-15

8026B

2-46. Conductance

2-47.

The conductance ranges, (2(X) nS and 2 mSjare included on the 8026B for making
both conductance and resistance measurements. When either range is selected the display
reads the measurement resuhs in terms of conductance

required, refer to the conductance-to-resistance conversion information given in F'igure
2-9.

2-48.

The 200 nS range is intended for use in making fast, accurate, high-resistance

measurements from 5 Mn to 10,000 Mn. Ordinarily, resistance measurements within this

range are plagued by noise pick-up and require careful shielding. However, by measuring
the resistance in terms of conductance, standard test leads are adequate for the 8026B to
make noise-free measurements up to 10,000 Mn. High value resistors, and low leakage
components (i.e., diodes, etc.) are natural candidates for the 200 nS conductance range.

Refer to applications later in this section for additional information.

2-49. The 2 rriS range, in terms of resistance, starts at 500n and goes up to 1 Mn. It is

intended for use in making either resistance measurements or direct-reading dc current

gain (beta) measurements on transistors. Beta measurements require the use of a special

test fixture, and are discussed later in this section under applications.

2-50. APPLICATIONS

2-51.

The applications described in the following paragraphs are suggested as useful
extensions of the 8026B measurement capabilities. However, they are not intended as the
equivalent of a manufacturer's recommended test methods. Rather, they are intended to

provide repeatable and meaningful indications which will allow operator to make sound

judgments concerning the condition of the device being tested; i.e., good, marginal, or

defective.

(1

/ n). if resistance readings are

2-52. Transistor Tester

NOTE

The transistor tester described in the following paragraphs provides
approximate test information. Beta is measured using a VCE of about 2
and an IC of about 200 fiA. The test method is very useful for making
comparative and matching measurements.

2-53.

Select the 2 mS range, plug the fixture shown in Figure 2-10 into the V/n/S and

COMMON input terminals, and you have tranformed your 8026B into a transistor tester.

Now, plug a transistor into the test socket and the 8026B will determine the following:

1.

Transistor type (NPN or PNP).

2.

Collector-to-emitter leakage (ICEs).

3.

Beta from 1 to KKX) without changing range.

2-16

V

*mS-to-kO

2

mS

(I'mS

inS

k(^

c
o

ro

ID

o

o

O
o

3

<

•
3

•

20-]

1

0;

05-

02-

0.1;

005-

0

03-

0

01;

0

005-

0

002-

0

001

-

Conversi

o

*

S=

Siemens
of conductance
mho.

to

I

•nS-to-kQ

Range

200

nS

(1000/nS

nS

un

200-

100;

50-

20-

10 =

5-

2-

1;

0 5-

02-

0 1-

Range

-

= kO)

-5

:i

-2

-5

= 10

-20

-50

= 100

-200

-

-500

=1000

on Scales

li\=International unit

= 1

formerly known as the

=Mn)

-i

= 10

r20

L

-50

= 100

-200

-500

= 1000

-2000

-

-sooo

= 10000

NO.

1
2
3
4
5
6
7

a

9

Find the approximate resistance value using one of
the scales
the most significant digit
the vertical NO. column, and
horizontal NO. row. The number
coordinates represents
value.

at

left. Then,

on

of

the

For example, a reading

the table below, locate

the display reading

the

next digit

at

the intersecting

unknown resistance

of

52.0 nS

is

equal

19.2 Mn. Decimal point location is determined from
the scale approximation.

Interpolation Table (I/no.)

.0
1
.500

.333
.250
.200
.167
.143
.125

111

.1
.909
.476
.323
.244

196
.164
.141
.123
.110

.2
.833
.455
.313
.238
.192
.161
.139

122

.109

.3
.769
.435
.303

233

.187

137

.108

159

121

.4
.714
.417

294
.227
.185

156

135
.119
.106

.5
.667
.400
.286
.222

182

.154
.133

.118
.105

.6

625
.385
.278
.217
.179
.152

.132
.116
.104

on

on the

to

.7

588
.370
.270
.213
.175
.149

.130

115

.103

.8
.556
.375

263
.208
.172
.147

.128
.114

.102

.9
.526
.345
.256
.204
.169
.145

.127
.112
.101

s

ho
a>
CD

SCHEMATIC

TRANSISTOR
UNOER
TEST

TEST

FIXTURE

s

ro
a>

03

»

o

OB

«

M

3

CONSTRUCTION DETAIL

3/16" HOLE

»C >

B >

»E >

WIRE TO BASE

CONTACT OF

TRANSISTOR SOCKET

BETA

^

'CEs

I

Rl

TRANSISTOR

PLUG INTO
COMMON AND
V/Kn/nS INPUT

TERMINALS

Jl

SOCKET

BANNANA PLUQ

CONNECTOR 0.75"
SPACING GENERAL
RADIO TYPE 274 MB

WIRE TO

SWITCH ARM

8026B

2-54. Transistor type is determined by setting the switch on the fixture to BETA and
observing the display. If a low reading (^.010) is obtained, reverse the test fixture at the
input terminals. Ifthe collector is now positioned at the COMMON input terminal, the
transistor is a PNP type. An NPN type will have its collector positioned at the V/n/S
input terminals. If the transi.stor is defective the indications will be as follows regardless of

fixture position:

1.

A shorted transistor will cause an overload indication.

2.

An open transistor will read 0.001 or less.

2-55.

After the transistor fixture is properly positioned, set the switch to ICEs for the

leakage test. The transistor is turned off in this test (base shorted to emitter), and should

appear as a very low conductance (high resistance) from collector-to-emitter. Therefore,

the lower the reading, the lower the leakage. Silicon transistors that read more than 0.002

(6 fiA) should be considered questionable.

2-56. Beta is determined by setting the fixture switch to BEl'A, and observing the

display. Mentally shift the decimal point three places to the right and read beta directly.

For example, a display reading of 0.127 indicates a dc current gain (beta) of 127.

NOTE

Beta is a termperature sensitive parameter. Therefore, repeatable readings
can only he obtained by allowing the transistor lo stabilize at the ambient
temperature while being tested. A void touching the transistor's case with
your fingers.

2-57. Leakage Tester

2-58.

The 200 nS conductance range effectively extends the resistance measurement
capability of the 8026B (up to 10,000 Mil) to the point where it can be used to provide
useful leakage measurements on passive components. For example, you can detect leaky
diodes, cables, connectors, printed circuit boards (pcbs), etc. Inallcases, the lest voltage is
<I.5V dc.

2-59. RESISTIVE COMPONENTS

2-60. Leakage testing on purely resistive components such as cables and pcbs is
straightforward. Select the 200 nS range, install the test leads in the V.'H/S and
COM MON input terminals, connect the leads to the desired test points on the unit-under­lest, and read leakage in terms of conductance. If an overrange occurs, select a resistance
range that provides an on-scale reading.

NOTE

Under high humidity conditions (>80'.c) conductance measurements may
be in error. To ensure accurate measurements connect clean test leads to the
8026 B

and (with the leads open) read the residual leakage in nanosiemens.
Correct subsequent measurements by subtracting the residual from ihe
readings. (Finger prints or other contamination on the pch may also cau.se
residual conductance readings.)

2-19

8026B

2-61.

DIODES

2-62. Diode leakage (I^) tests require that the diode junction be reverse biased when
being measured. This is accomplished by connecting the anode of the diode to the
COM MON input terminal and its cathode to the V/ n/ S input terminal. Leakage can then

be read in terms of conductance. In the event of an overrange, select a resistance range that

provides an on-scale reading.

NOTE

Like all general-purpose multimeters, the 8026B generates and uses radio

frequency energy. It

radio or television reception. If interference does occur, try moving the
8626B to a different location, plugging the radio or television into a
different socket, or reorienting the antenna.

is

possible for radio frequency energy to interfere with

2-20

8026B

Section 3

Theory of Operation

3-1.

INTRODUCTION

3-2. This section ofthe manual contains an overall functional description followed by a

block diagram analysis ofthe 8026B. A detailed schematic of the8026B appears in Section

7.

3-3. OVERALL FUNCTIONAL DESCRIPTION

3-4. The Model 8026B as shown in Figure .3-1, is a hand-held 8 function digital
multimeter. It features a total of
six, dc current-four, ac current-four, and conductance-two); with overload protection for
all ranges.

3-5.

Operation centers around a custom LSI chip, Ul, which contains a dual slope a/d

converter and a display driver. Peripherals to U1 include range and function switches,

input signal conditioners, and the display. When an input signal is applied to the 8026B it is
routed through the range switches to one of four input signal conditioners as determined
by the function switch setting. Each conditioner scales and converts the input to an
acceptable dc input level (-0.2 to +0.2V dc) that is presented to the a/d converter.

26

measurement ranges (dc volts-five, ac volts-five, ohms-

3-6. Timing for the overall operation of the a/d converter is derived from an external
quart/ crystal whose frequency is a multiple ofthe local line frequency. This allows the
conditioned dc input data to be integrated over an integral number of power line cycles,
thus optimizing both common mode and normal mode rejection.

3-7. Digitized measurement data is presented to the display as four decoded digits (seven
segments) plus polarity. Decimal point position on the display is determined by the range
switch settings.

3-8. BLOCK DIAGRAM ANALYSIS
3-9. A/D Converter

3-10. Ihe entire analog-to-digital conversion process is accomplished by a single custom
A/D Converter and Display Driver IC. Ul. The IC employs the dual slope method of a/d
conversion, and requires a series of external components to establish the basic timingand
referenece levels required for operation. Ihese include an integrating capacitor, an
autozero capacitor, and a fiying capacitor (for applying a reference level of either

3-1

8026B

polarity). Since the power consumed for display operation is very low. the IC also contains
the latches, decoders, and drivers required for the display.

3-11.

The digital control portion of the a/d conversion process is an internal function of

Ul.

and is keyed to the external crystal frequency. As a result, the conversion process is

continuously repeated, and the display is updated at the end of every conversion cycle.

3-12. A simplified circuit diagram of the analog portion of the a/d converter is shown in
Figure 3-2. Each of the switches shown represent analog gates which are operated by the
digital section of the a/d converter. Basic timing for switch operation and. therefore, a
complete measurement cycle is also included in the figure.

3-13.

Any given measurement cycle performed by the a/d converter can be divided into
three consecutive time periods, autozero (AZ), integrate (INFEG), and read. Both
autozero and integrate are fi.xed time periods whose lengths are multiples of the clock
frequency. A counter determines the length of both time periods by providing an overfiow
at the end of every 10,000 clock pulses. The read period is a variable time which is
proportional to the unknown input voltage. The value of the voltage is determined by
counting the number of clock pulses that occur during the read period.

3-14. During autozero a ground reference is applied as an input to the a/d converter.

Under ideal conditions the output of the comparator would also go to zero. However,
input-offset-voltage errors accumulate in the amplifier loop, and appear at the

comparator output as an error voltage. This error is impressed across the AZ capacitor

where it is stored for the remainder of the measurement cycle. The stored level is used to
provide offset voltage correction during the integrate and read periods.

3-15.

The integrate period begins at the end ofthe autozero period. As the period begins,
the AZ switch opens and the INTEG switch closes. This applies the unknown input voltage
to the input of the a/ d converter. The voltage is buffered and passed on to the integrator to
determine the charge rate (slope) on the INTEG capacitor. By the end ofthe fixed integrate
period the capacitor is charged to a level proportional to the unknown input voltage. Ihis
voltage is translated to a digital indication by discharging the capacitor at a fixed rate
during the read period, and counting the number of clock pulses that occur before it
returns to the original autozero level.

3-16. As the read period begins, the INTEG switch opens and the read switch closes. Ihis
applies a known reference voltage to the input ofthe a/d converter. The polarity ofthis
voltage is automatically selected to be opposite that ofthe unknown input voltage, thus,

causing the INTEG capacitor to discharge at a fixed rate(slopc). When the charge is equal

to the initial starting point (autozero level), the read period is ended. Since the discharge

slope is fixed during the read period, the time required for discharge is proportional to the

unknown input voltage.

3-17. The autozero period and. thus, a new measurement cycle begins at the end ofthe
read period. At the same time the counter is released for operation by transferring its
contents (previous measurement value) to a seriijs of latches. This stored data is then
decoded and buffered before being used for driving the liquid crystal display.

3-2

(n

-n
c

3

In

OD

(0

3

n

a.

n

S

5

5
3

V/n/S

COMM

mA

/

/

' 1

RANGE

SWITCHES

/

/

n

mA

.

VOLTAGE

DIVIDER

OHMS

CONVERTER

CONTINUITY

ANNUNCIATOR

AC

CONVERTER

-

/

mA

CURRENT

SHUNT

/

/

RANGE

SWITCHES

0 or 1 /n

V ac

V

ac/mA

ac

V dc

FUNCTION
SWITCHES

DC
ANALOG
DATA

DECIMAL
POINT

A/D

CONVERTER

AND

DISPLAY

DRIVER

i

he.-»-'1

DISPLAY

SK

3N

>

AL

CONDITIC

)NEF

^S

§

ro

i

I

a

c
S.

CO

o

?

O
%

I

EXTERNAL

INPUTS

± REF

(FLYING

CAPACITOR)

UNKNOWN

INPUT

VOLTAGE

±

READH

INTEG

AZ

BUFFER

AMP

COMPARATOR

INTEGRATOR

AZ

TO
DIGITAL

"CONTROL

LOGIC

INTEG

-H(—

INTEG READ AZ

±.20

u

lO

o

•o

•

AZ

I

>

D
O

S
<
a.

o

a
o

CJI

COUNTER

OUTPUT

'An integral number of line cycles for optimum

Common mode and normal mode rejection.

10,000 I

-W I

—1

1000

2000

00

o

ro
o>

•D

8026B

3-18. Input Signal Conditioners

3-19. The a/d converter requires two externally supplied input voltages to complete a

measurement cycle. One is reference voltage and the other is an unknown dc voltage w ithin
the range of -0.2 to +0.2V dc. If the function being measured is other than a dc voltage

within the ±0.2 range, it must be scaled and/ or conditioned before being presented to the

a/d converter, for example, higher dc levels must be divided; ac inputs must be divided,
rectified, and filtered; and resistance and current inputs must be scaled and converted to dc
voltlagc levels. The following paragraphs describe the input signal conditioners used for
each of the 8026B measurement functions.

3-20. VOLTAGE MEASUREMENT

3-21.

Both the ac and dc voltage ranges use an over-voltage-protected, 10 Mn input
divider as shown in Figure 3-3 A. Under normal conditions, assuming a dc input level on
the proper range, the divider output is a 0.2 to +0.2V dc signal, and

10) ratio of the input signal. If the VAC function is selected, the divider output is ac
coupled to an rms ac convener whose dc output is equivalent to the rms level of the ac
inputs. The conditioned signal for the selected function (V ac or V dc) is then passed
through a filter before being presented to the a/d converter as the unknown input.

3-22. CURRENT MEASUREMENT

3-23.

Current measurements are made using a fuse protected, switchable, four-terminal

current shunt (0. Kl, Ul, lOn, or lOOn) to f>erform the current-to-voltage conversion
required by the a/d converter. See Figure 3-3B. The voltage
selected shunt may be either ac or dc depending upon the selected function, mA AC or m A
DC.

if the input current is dc and the dc function is selected, the 1 R drop is pas.sed through
a low-pass filter, and presented as the unknown input to the a/ d converter. H owever. if the
input current is ac and the AC function is .selected, the I R drop is proces.sed by the ac
converter before going to the low-pass filter.
input voltage proportional to the current passing through the selected shunt.

I n

either event the a/ d converter receives a dc

is

an exact

(power-of-

(1

R) drop produced across the

3-24. RESISTANCE MEASUREMENTS

3-25.

Resistance measurements are made using a ratio technique as shown in Figure 3-

iC.

When the n function is selected, a simple series circuit is formed by the internal
reference voltage, a reference resistor from the voltage divider (selected by range switches),
and the external unknown resistor. Ihe ratio ofthe two resistor values is equal to the ratio
of their respective voltage drops. Therefore, since the value of one resistor is known, the
value of the second can be determined by using the voltage drop across the known resistor
as a reference. This determination is made directly by the a/d converter.

3-26. Overall operation ofthe a/ d converter during a resistance measurement is basically
as described earlier in this section, with one exception. The reference voltage present
during a voltage measurement is replaced by the voltage drop across the referenc-e resistor.
This allows the vohage across the unknown resistor to be read during the integrate period,
and compared against the reference resistor during the read period. As before, the length
of the read period is a direct indication of the value of the unknown.

3-27.

CONDUCTANCE MEASUREMENTS

3-28. Conductance measurements are made using a ratio technique similar to that used
in making resistance measurements. See Figure 3-3C. The main difference is that only two

3-6

8026B

ranges are provided (200 nS and 2 mS). and the function of the range and unknown
resistors in the measurement cycle is reversed. That is, the voltage drop across the range
resistor is used as the unknown input during the integrate period, and the voltage across
the unknown resistor is used for the reference input during the read period. Asa result the
display provides a reading that is the reciprocal (l/U) ofthe unknown input resistance,
i.e., the higher the input resistance the lower the display reading.

3-29. CONTINUITY MEASUREMENTS

3-30. Continuity is a measurement feature that supplements the resistance and
conductance measurement functions. The feature is enabled when the V/n and the
AC/

DC function switches are both pressed in. When a measurement is made, continuity is
indicated by an audible tone. No tone indicates an open circuit or the equivalent of an open
circuit.

3-31.

Ihe continuity circuit consists of a comparator, a one-shot, and a tone generator.
See Figure 3-3D. During a measurement. R pull-up and V source develop a voltage across
the measured resistance. The comparator compares this voltage against an internal 100
mV threshold reference. Ifthe input voltage is greater than the 100 mV reference, the tone
generator is not enabled, a no-continuity indication. Conversely, an indication of less than

100 mV causes the comparator to enable the tone generator which emits an audible

continuity indication.

3-32. Since the values of V source and R pull-up vary with the selected range, it is
convenient to think of the 100 mV threshold as a resistance threshold. The resistance
threshold and the V source/ R pull-up values for each continuity range are given in the
following list:

RANGE

200n

2 kn

2mS
20 kn
200 kn
2000 kn
20 Mn
200 nS

3-33.

Extremely short changes in a continuity condition (intermittent open or short
circuits) are detected by the one-shot and maintained for approximately 200 ms. This pulse
stretching effect ensures that a reliable audio tone is generated for continuity changes as
short as 50

AIS

in the 2 kil range.

R pull-up

4 kilohms

3 kilohms
3 kilohms
100 kilohms
100 kilohms
10 megohms
10 megohms
10 megohms

V source
(VOLTS)

1.2 volts

2.8 volts

2.8 volts

1.2 volts

1.2 volts

1.2 volts

1.2 volts

1.2 volts

THRESHOLD

RESISTANCE

360 ohms

110 ohms

110 ohms
9 kilohms
9 kilohms
900 kilohms
900 kilohms
900 kilohms

3-7

00

VOLTAGE

•

4.

DIVIDER

DC

<

•n

IQ

C

3

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OD

3

1

Ull

(Q

3

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• AC

AC

CONVERTER

VOLTAGE MEASUREMENTS

LOW

PASS

FILTER

UNKNOWN

TO A/D

CONVERTER

V/kO •-

SELECTED
CURRENT

SHUNTS

CO

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A

3

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o
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a
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3

s

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INPUT

TERMINALS

COMM»—•-

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AC

CONVERTER

CURRENT MEASUREMENTS

a

AC

LOW

PASS

FILTER

HI

UNKNOWN

TO A/D

CONVERTER

-• LO

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—A

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-• HI

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1

VREF

TO A/D

CONVERTER

LOW

PASS

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UNKNOWN V/REF

TO A/D

CONVERTER

c

u

3

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v/kn/s

<

S TERMINALS

O

INPUT

z

SELECTED

REFERENCE

RESISTOR

ro

s

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3

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RESISTANCE MEASUREMENTS

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a
3

INPUT

TERMINALS

COM

pull-up

n/s

I

100 mV
THRESHOLD
REFERENCE

I

PULSE

STRETCHER

OSCILLATOR

TONE

TRANSDUCER

n

CONTINUITY CIRCUIT

00

o

to

o>

W

8026B

static awareness

A Message 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 a problem.

2.

Learning the guidelines for handling them.

3. Using the procedures, and packaging and

bench techniques that are recommended

The Static Sensitive (SS.) devices are identified m the Fluke technical manual parts list with the symbol

The following practices should be followed to minimize damage to SS. devices.

1.

MINIMIZE HANDLING

2.

KEEP PARTS IN ORIGINAL CONTAINERS

UNTIL READY FOR USE.

3-12

3. DISCHARGE PERSONAL STATIC
BEFORE HANDLING DEVICES

4.

HANDLE SS. DEVICES BY THE BODY

Page 1 of 2

USE ANTI-STATIC CONTAINERS FOR

HANDLING AND TRANSPORT

DO NOT SLIDE S S. DEVICES OVER
ANY SURFACE

8026B

WHEN REMOVING PLUG-IN ASSEMBLIES.
HANDLE ONLY BY NON-CONDUCTIVE
EDGES AND NEVER TOUCH OPEN EDGE
CONNECTOR EXCEPT AT STATIC-FREE
WORK STATION PLACING SHORTING
STRIPS ON EDGE CONNECTOR USUALLY
PROVIDES COMPLETE PROTECTION TO
INSTALLED SS DEVICES.

AVOID PLASTIC. VINYL AND STYROFOAM-

IN WORK AREA

PORTIONS REPAINTED
WITH PERMISSION FROM TEKTRONIX. INC
AND GENERAL DYNAMICS. POMONA DIV.

.

Do—

C^tmiCH

Page 2 ot 2

9 HANDLE S S DEVICES ONLY AT A

STATIC-FREE WORK STATION

10 ONLY ANTI-STATIC TYPE SOLDER-

SUCKERS SHOULD BE USED

11 ONLY GROUNDED TIP SOLDERING

IRONS SHOULD BE USED

Anti-static bags, lor storing S S. devices or pcbs
with these devices on them, can be ordered from the
John Fluke Mfg. Co.. Inc.. See section 5 in any Fluke
technical manual for ordering instructions. Use the
following part numbers when ordering these special
bags.

John Fiuko Part No. D«Cripiiori
453522 e'XS'Bag
453530 8' X 12- Bag

453548 l6'X24'Bdg
454025 12" X 15"Bag
Pink Poly ShiiiM Wnsl Sir an
30"x60"x60 Mil P/NrL6-60
P.'N

RC

AS 1200 S/.OO

S20 00

J0089B-07U7810 SE fcN Lilho in u S A

3-13/3-14

8026B

Section 4

Maintenance

WARNING

THESE SERVICINQ INSTRUCTIONS ARE FOR USE BY QUALIFIED
PERSONNEL ONLY. TO AVOID ELECTRIC SHOCK, DO NOT PERFORM
ANY SERVICING OTHER THAN THAT CONTAINED IN THE OPERATING
INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO.

4-1.

INTRODUCTION

4-2.

This section ofthe manual contains maintenance information for the Model 8026B.
This includes service information, general maintenance, performance test, calibration and
troubleshooting. The performance test is recommended as an acceptance test when the
unit is first received, and later as a preventive maintenance tool to verify proper instrument
operation. A I-year calibration cycle is recommended to maintain the specifications given

in Section I of this manual. The test equipment required for both the performance test and
calibration is listed in Table 4-1. If the recommended equipment is not available,
instruments having equivalent specifications may be used.

4-3.

SERVICE INFORMATION

4-4.

The 8026B is warranted for a period of two years upon delivery to the original

purchaser. Conditions of the warranty are given at the rear of this manual.

4-5.

Malfunctions that occur within the limits ofthe warranty will be corrected at no cost
to the purchaser. For in-warranty repair, call (toll-tree) 800
nearest Fluke Technical Service Center designated to service your instrument. (In Alaska,
Hawaii, Washington or Canada call 206 356-5400.) Ship the instrument postpaid in the
original shipping container (if available). Dated proof-of-purchase will be required for all
in-warranty repairs.

4-6.

Fluke Technical Service Centers are also available for calibration and/ or repair of
instruments that are beyond the warranty period. Call the number listed above for
shipping information. Ship the instrument and remittance in accordance with instructions
received.

426-0361

for the address of the

4-1

8026B

INSTRUMENT

TYPE

DMM Calibrator

AC Calibrator

Table

4-1.

List of Recommended Test Equipment

REQUIRED CHARACTERISTICS

PREFERRED

John Fluke 5100A family

ALTERNATE

Voltage Range: 0 to 750V ac
Frequency Range: 100 to 450 Hz:
±0.25%
Voltage Accuracy: 100 to 450 Hz:
±0.1%

RECOMMENDED

MODEL

John Fluke
Models
5100B,

5101B, 5102B

John Fluke Models

5200A and
5215A/5205

DC Calibrator

DC Current
Calibrator

Decade
Resistor or
Individual

Resistors

4-7.

GENERAL INFORMATION

4-8.

Access Information

To avoid contaminating the pch with oil from the fingers, handle it by the .

edges or wear gloves. If the pcb does become contaminated, refer to the

cleaning procedure given later in this section.

4-9.

BACKUP FUSE (F2) AND CALIBRATION ACCESS

4-10. Use the following procedure to access the 8026B calibration adjustments.

1.

Set the power switch to OFF.

2.

Disconnect test leads and battery eliminator, if attached.

Voltage Range: 0 to 1000V dc
Accuracy: ±0.025%

Current Range: 2 mA to 2A
Accuracy: ±0.2%

Resistance Values: 1900,1.9 kn, 19

kn,

190 kn, 1.9 Mn, and 10 Mn

Accuracy: ±0.025%

Power Rating: ^1/8 watt

NOTE

John Fluke Model
343A

John Fluke Model

382A

ESI Model DB62

4-2

3.

Open the battery compartment and disconnect the battery.

4.

Remove the three phillips-head screws from the bottom of the case.

5.

Turn the instrument face-up and grasp the top cover at both sides of the input

connectors. Then, pull the top cover from the unit.

6. Backup Fuse (F2) and all adjustments necessary to complete the calibration
procedure are now accessible (see Figure 4-1).

4-11.

COMPONENT/PCB ACCESS

4-12.

Use the following procedure to remove the Main PCB Assembly from the case:

1.

complete the calibration access procedure.

2.

Remove the screw from shield.

3.

Using your index finger, lift the lower right-hand corner of the pcb. When the
pcb is freed, pull it to the right until it clears the shelf under the buttons, and then lift
up.

Handle the PCB by its edges to prevent surface contamination.

4.

To reassemble the 8026B logically reverse this procedure.

8026B

%

Figure

FINE ADJUST

COARSE ADJUST

-DC CAL

-2V AC 10 kHz CAL

-20V AC 7 kHz CAL

•SHIELD

<;fr^

®-

fSW"

*Shicld must he in place when

making HF adjustment.

4-1.

Calibration Adiustment Locations

AC CAL

4-3

8026B

NOTE

When installing the
left-hand side of the bottom case, and thread the battery-clip through the
battery-cover opening. Also make sure that the removable plastic lip that
resides beneath the range switch pushbuttons is properly installed in the
bottom ca.se. The green power switch cap should also be mounted on the

power .switch.

4-13.

DISPLAY ACCESS

4-14. Refer to Figure 4-2 and the following procedure to remove/replace the LCD
assembly.

1.

Remove the Main PCB Assembly using the PCB access procedure.

2.

Place your thumbs on either side of the display lens and carefully slide the lens

out of the LCD bracket.

3.

Tum the LCD bracket upside down, gently tap it against your palm. The LCD

should fall out.

When installing the LCD make certain that its flat surface is facing out and
its connector pattern is on top of and makes contact with, the flexible
layered connector. All of the parts indicated in figure 4-2 must be

thoroughly cleaned and free of particles to assure proper display operation.

pcb,

route the battery-clip wires behind the post on the

NOTE

LAYERED
CONNECTOR

LCD MOUNTING

BRACKET

4-4

DISPLAY LENS

CONNECTOR
PATTERN

LCD

Figure 4-2. LCD Display Assembly

4-15.

LSI (Ul) ACCESS

4-16.

Use the following procedure to remove/replace the A/D Converter and Display

Driver IC. Ul.

1.

Remove the pcb assembly using the component/pcb access procedure.

2.

On the bottom of the pcb locate and remove the two phillips-head screws from

the display assembly.

3.

Lift the display assembly from the pcb to expose Ul.

CAUTION

U1 Is a MOS device and Is subject to damage by static discharge. Observe the
precautions given later in this section under troubleshoooting before
attempting to remove or replace Ul.

4.

Use a screw driver or a reasonable substitute to rock (by prying up on each end

of the IC) the IC out of it socket.

5.

When installing Ul make sure all pins are lined up in the socket, and then

carefully press it into place.

4-17.

Cleaning

CAUTION

Do not use aromatic hydrocarl>ons or chlorinated solvents tor
solutions will react with tlie plastic materials used In the Instrument.

cleaning.

These

8026B

CAUTION

Do not allow the liquid crystal display to get
before washing the pcb and do not Install It until the pcb has been fully dried.

4-18.

Clean the front panel and case with a mild solution of detergent and water. Clean

wet.

Remove the Display Assembly

dust from the circuit board with low pressure (<20 psi) dry air. Contaminates can be
removed from the circuit board with deminerali/.ed water and a soft brush (remove the
Display Assembly before washing, and avoid getting excessive amounts of water on the
switches). Dry with clean, dry air at low pressure, and thenbakeat 50to60°C(l24-140°F)
for 24 hours.

4-19.

Battery/Backup Fuse Replacement

WARNING

BATTERY/FUSE REPLACEMENT SHOULD ONLY BE PERFORMED AFTER
THE TEST LEADS HAVE BEEN REMOVED FROM THE INPUT JACKS, ANO
THE POWER SWITCH IS SET TO OFF. BACKUP FUSE REPLACEMENT

PROCEDURES MUST BE PERFORMED BY QUALIFIED SERVICE

PERSONNEL ONLY. USE ONLY THE RECOMMENDED FUSE TYPE FOR

REPLACEMENT.

4-5

8026B

4-20. Refer to Section 1 of this manual for battery and main fuse (Fl) replacement
procedure. Use the following procedure to replace the backup fuse (F2).

1.

Complete the Backup Fuse and Calibraion Access procedure located earlier in

this section.

2.

Using a pointed tool such as a probe tip, pry the backup fuse from its holder.

3.

Replace the defective backup fuse with a 3A, 600V type BBS-3 only.

4-21.

PERFORMANCE TEST

4-22.

The performance test is used to compare the 8026B performance with the list of
specifications given in Section 1 of this manual. It is recommended for incoming
inspection, periodic maintenance, and to verify specifications. Ifthe instrument fails any
part of the test, calibration and/or repair is indicated.

4-23.

Initial Procedure

4-24. Establish the following test conditions before continuing with the Performance

Test:

1.

Allow the unit to stabilize at an ambient temperature of 23 ±5°C (73 ±9° F).

2.

Check and, if necessary, replace the fuses and battery.

3.

Set the power switch to ON.

4-25.

Display Test

4-26.

The following procedure is used to test the operation of all display digits and

segments:

1.

Select the n function and the 20 kn range. The display should be blanked with
the exception of the overrange indicator (I) in the left hand column and a decimal
point in the center of the display.

2.

Connect a Decade Resistor between the V/n/S and COMMON input

terminals.

3.

Set the Decade Resistor to 10 kn and verify a display of 10.00 ±3 digits.

4.

Sequentially increase the resistance in

each digit and its segments.

5.

Disconnect the Decade Resistor at the input terminals, and select the 2000 kn

range. A decimal point should not be displayed.

6. Sequentially select the 200, 20 and 2 kn range. The decimal point should
appear in the tenths, hundredths, and thousandths position, respectively.

4-6

1.

11

kn steps and verify the operation of

8026B

4-27.

Resistance/Conductance Test

4-28.

The operation and accuracy of the resistance and conductance ranges are tested in

the following procedure:

1.

Connect the Decade Resistor between the V/n/S and COMMON input

terminals.

2.

Refer to Table 4-2, and select the range and input conditions specified in step I.

Verify that the display reading is within the limits shown.

3.

Execute and verify steps 2 through 8 of Table 4-2, using the procedure

described in step 2.

4-29.

Continuity Test

4-.30. Use the following procedure to verify proper operation of the continuity function:

1.

Select the n function and 2 kn range.

2.

Connect the test leads to the COMMON and V/n terminals.

3.

Depress the AC/DC switch to activate the audible tone.

4.

Momentarily short the test leads together and observe that the tone sounds.

WARNING

THE LOCAL LINE VOLTAGE IS USED IN THE FOLLOWING STEP. BE

CAREFUL

NOT TO TOUCH THE PROBE TIPS WITH

YOUR

FINGERS OR

TO

ALLOW THE 120V AC RECEPTACLE TO BECOME SHORTED.

a.

M

1
2
3
4
5

6

7

6
9
10

RANGE

2oon
2kn
2oon
2kn
20 kn
200 kn
2000 kn
20 Mn
200 nS
200 nS

Table 4-2. Resistance/Conductance Checks

DECADE RESISTOR

INPUT

RESISTANCE

Short
Short
I90n

1.9 kn
19 kn
190 kn
1900 kn
10 Mn
10 Mn

Open

DISPLAY

READING

00.0 to 00.2

0.000

to 0.001

189.3 to 190.7

1.897 10 1.903

18.97 to 19.03

189.7 to 190.3
1861 to 1939

9.80 to 10.20

97.0 to 103.0

01.0 to 00.0

JOHN FLUKE

5100B/5101B/5102B

INPUT

RESISTANCE

Short
Short

loon
1 kn
10 kn
100 kn
1000 kn
10 Mn
10 Mn
Open

DISPLAY

READINGS

00.0 to 00.2
.000 to 0.001

99.5 to 100.5
.998 to 1.002

9.98 to 10.02

99.8 to 100.2
980 to 1020

9.80 to 10.20

97.0 to 103.0

01.0 to 00.0

4-7

8026B

5.

At a convenient 120V ac receptacle, insert the test leads as if to measure the line
voltage. A series of beeps at a rate of approximately 5 to 10 per second indicates
proper operation of the pulse stretcher circuit.

4-31.

DC Voltage Test

4-32.

Use the following procedure to check the accuracy and overall operation of the dc

voltage ranges:

WARNING

CONNECT THE GROUND/COMMON/LOW SIDE OF THE VOLTAGE
CALIBRATOR TO COMMON ON THE 8026B.

1.

Set the DC Calibrator for a zero volt output.

2.

Connect the DC Calibrator output to the V/n/S and COMMON input

terminals of the 8026B (calibrator ground/common/low to 8026B COMMON.

3.

With reference to Table

4-3,

select the 8026B voltage range given in step

1,

and
set the DC Calibrator output to the corresponding 8026B input voltage. Verify that
the display reading is within the limits shown.

4.

Execute and verify steps 2 through 7 of Table 4-3, using the procedure

described in step 3.

4-33.

AC Voltage Test

4-34. The ac voltage ranges are checked for accuracy and operation using the following

procedure:

WARNING

CONNECT THE GROUND/COMMON/LOW SIDE OF THE AC CALIBRATOR
TO COMMON ON THE MODEL 8026B.

I. Set the AC Calibrator for a zero volt ac output.

4-8

STEP

1
2
3
4
5
6
7

Table 4-3.

VOLTAGE

RANGE

200 mV
200 mV
2V
2V
20V
200V

1000V

DC Voltage Checks

INPUT

VOLTAGE, DC

+ 190.0 mV

-190.0 mV
O.OV

f1.9V

+ 19V

+ 190V

+1000V

189.7 to 190.3

-189.7 to -190.3

-.001 to .001

1.897 to 1.903

18.97 to 19.03

189.7 to 190.3

998 to 1002

DISPLAY

READING

2.

Connect the AC Calibrator output to the V/n/S and COMMON input

terminals for the 8026B (calibrator ground/common/low to 8026B COMMON).

3.

Withreference to Table 4-4, select the 8026B voltage range given instep Land
set the AC Calibrator output to the corresponding 8026B input voltage and
frequency. Verify that the display reading is within the limits shown.

4.

Execute and verify steps 2 through 12 of Table 4-4, using the procedure
described in step 3.

4-35.

DC Current Test

4-36.

The following procedure is used to check the operation and accuracy of the dc

current ranges.

1.

Set the output of the DC Current Calibrator to zero mA.

2.

Connect the output ofthe DC Current Calibrator to the (A) and COMMON
input terminals on the 8026B.

3.

With reference to Table
and set the calibrator output to provide the corresponding 8026B input current.
Verify that the display reading is within the limits shown.

4.

Execute and verify steps 2 through 4 of Fable 4-5, using the procedure

described in step 3.

4-5,

select the 8026B current range indicated in step I,

8026B

STEP

VOLTAGE RANGE

1
2
3
4

5
6
7
8

9

10
11
12

13
14

15
16

200 mV
200 mV
200 mV
200 mV

2V
2V
2V
2V

20V

20V
20V

20V

200V
200V

750V

750V

Table 4-4. AC Voltage Test

INPUT

VOLTAGE

Short

190.0 mV

10.0 mV

10.0 mV

1.900V

1.900V

1.900V

1.900V

19.00V

19.00V

19.00V

19.00V

110.0V

110.0V
750V

750V

FREQUENCY

dc
50 Hz
50 Hz
10 kHz

10 kHz
5 kHz
2 kHz
50 Hz

50 Hz
2 kHz
5 kHz
10 kHz

2 kHz
50 Hz

50 Hz
1 kHz

DISPLAY READING

00.0 to 00.2

188.9 to 191.2

9.7 to 10.3

9.5 to 10.5

1.859 to 1.941

1.878 to 1.922

1.889 to 1.912

1.889 to 1.912

18.89 to 19.12

18.89 to 19.12

18.78 to 19.22

18.59 to 19.41

108.7 to 111.3

109.3 to 110.8
744 to 756

744 to 756

4-9

8026B

Table 4-5. DC Current (mA) Checks

STEP

1

2

3

4

4-37.

CALIBRATION

4-38. U nder normal operating conditions, the 8026B should be calibrated once a year to

maintain the specifications given in Section I of this manual. If instrument repairs have
been made or if the unit fails the performance test, immediate calibration is required.
Equipment required for calibration is listed in Table

available, your nearest authorized Fluke Technical Service Center will be happy to help. A

list of these service centers, as well as shipping information, is given at the back of this
manual.

4-39.

Use the following procedure to calibrate the 8026B.

CURRENT

RANGE
2 mA .

20 mA

200 mA
2000 mA

INPUT

CURRENT, DC

+1.9 mA

-19 mA
+ 190 mA
+1900 mA

4-1.

Ifthe necessary equipment is not

NOTE

DISPLAY

READING

l.fiWi

to 1.915

-18.85 to -19.15

188.5 10 191.5
1885 to 1915

This procedure assumes an ambient temperature of 23 ±2°C (70 to
and a relative humidity of less than
he allowed to stabilize for at least 30 minutes before calibration begins.

1.

Remove the top cover from the 8026B using the access procedure given earlier

in this section.

2.

Set the 8026B power switch to ON and select the 200 mV DC range.

3.

Set the output of the DC Calibrator to +190.0 mV and connect it to the 8026B

input terminals; + to V/n/S, and - to COMMON.

4.

Adjust the DC CAL pot (R5), as shown in Figure

190.1.

(Use a plastic adjustment tool or a plastic screw driver for all ajustments.)

5.

Disconnect the DC Calibrator from the 8026B input terminals.

6. Select the 200 mV AC range on the 8026B.

7.

Set the output of the AC Calibrator to 190 mV at IOO Hz, and connect it to the

8026B input terminals: V/n/S and COMMON.

The calibration adjustment tool will need to be tilted slightly to gain access
to RI7 and RI9 as required in the next two steps.

4-10

80%.

The temperature ofthe unit should

4-1,

for a display of 190.0 or

NOTE

77°

F)

8026B

8. On the 8026B, adjust the AC CAL potentiometer marked T' (fine adjust ­RI9) so that it is at mid-range.

9. Adjust the AC CAL potentiometer marked "C (coarse-adjust - RI7) so that

the 8026B displays 190.0 ±3 digits. Then adjust R19 ("F' - fine adjust) so that the
8026B displays 190.0 (an occasional flash of ±1 digit is acceptable).

10.

Select the 20V ac range on the 8026B.

11.

Set the output of the AC Calibrator to 19.00V at 7 kHz.

12.

Adjust the HF CAL 20V capacitor (C9) for a display of 18.98 to 19.02.

13.

Select the 2V ac range on the 8026B.

14.

Set the output of the AC Calibrator to

15.

Adjust the HF CAL 2V capacitor (C2) for a display of 1.898 to

16.

Reinstall the 8026B top cover. Execute the performance test given earlier in

this manual to ensure that all fixed range resistors and other non-adjustable

components are operating within their specified limits.

NOTE

The HF

CA L

affected when the 8026B top cover is reinstalled. Ifthe high frequency ac

performance is slightly outside the specified limits, remove the top cover

and readjust C9 and C2 accordingly.

adjustments performed in Steps 12 and 15 will be slightly

1.900V

at 10 kHz.

1.902.

4-40.

TROUBLESHOOTING

CAUTION

Static discharge can damage MOS components contained In the 8026B.

4-41.

When troubleshooting or repairing the 8026B use the precautions listed on the
Static Awareness sheet to prevent damage from static discharge. Never remove, install or
otherwise connect or disconnect components without first setting the 8026B power switch
to OFF.

4-42.

A troubleshooting guide for the 8026B is given in Table 4-6. To properly use the
guide complete the performance test given earlier in this section and note any
discrepancies. Then locate the heading of the procedure in question in the Test and
Symptom column (Table 4-6). U nder that heading isolate the symptom that approximates
the observed malfunction. Possible causes are listed to the right ofthe selected symptom.
Details necessary to isolate a particular cause can be derived from the theory of operation
in Section 3 and the schematic diagram in Section 7.

4-11

8026B

Table 4-6. Troubleshooting Guide

TEST AND SYMPTOM

INITIAL PROCEDURE

BT is displayed when unit is
turned on.

Display blank.

DISPLAY TEST

One or more segments will not

light through entire test.

Decade inoperative or one or
more segments always lit.

Improper decimal point
indication.

Minus sign improperly dis­played.

Display lit but does not respond
to changes in input.

RESISTANCE/CONDUCTANCE

TEST

Displayed reading is out of
tolerance on at least one but not
all ranges.

Readings are noisy on all
ranges.

Readings are out of tolerance on
high ohms.

Residual reading with test leads
open

DC VOLTAGE TEST

Display reading is out of

tolerance on 200 mV range.

All ranges read 000.

Readings are out of tolerance on
all ranges except 200 mV.

POSSIBLE CAUSE

Low battery, Q3, U2, Ul. (See also
operating note for A81 accessory.)

Dead battery, power switch, VR2
shorted,

Defective or contaminated display
Converter Ul.

Reference VRl, crystal Y1, A/D
Converter Ul.

Ul, J4, battery connector.

interconnect, display, or A/D

Ul.

Range switches, Z6, U2, or display.
(Check signals at U2 to isolate.)

Ul.

Range resistor Zl.

Thermistor

RJI,
severe overload.

PCB is contaminated (see cleaning
procedure. Section 4.)

Out of calibration (DC), Vref (VRl) in
error,

R2 - fusible resistor open.
Range resistor Zl, Z3, Z4.

RT1,

R2 open.

RJ2, RJ3, RJ4 damaged from

Z2, Ul, SI.

4-12

Table 4-6. Troubleshooting Guide (cont)

8026B

TEST AND SYMPTOM

AC VOLTAGE TEST

Displayed reading is out of
tolerance in 200 mV range.

All ranges read 000.
Negative overload displayed.

Readings are out of tolerance on
some or all ranges except 200
mV at 45 Hz to approximately
500 Hz.

One or more ranges other than
2(K) mV out of tolerance above
approximately 1 KHz.

DC CURRENT TEST

Input does not affect display.
Displayed reading is out of

tolerance on one or more

ranges.

POSSIBLE CAUSE

Out of calibration (AC), AC converter
defective U4.

R2 - fusible resistor open.
05,

04, VR3.

Z1,Z3,

Z4, U4.

C2 out of cal (2V range only), C9 out of
cal,

C12, C14, foam input divider
support missing, shield screw missing.
negative regulator to U4 is 'full-on.' Q5,
Q4,

VR3. (Predominantly affects 2V
range at 10 kHz as battery voltage
drops). Instruments that have received
mechanical abuse may need to be
recalibrated for ac performance.

Fuse Fl and/or F2 open, CR6, U5
If 2000 mA and 200 mA ranges are

okay, Z3 is defective. Otherwise Z4 is

defective.

CONTINUITY TEST

Tone doesn't sound when test

leads are shorted.

CALIBRATION

DC CAL pot at limit.

AC CAL pot at limit.

HF adjust at limit.

S1G,

S8B, AR20, U20, LSI, Board

interconnection, defective test

test lead in mA jack.

VR1,Z2,

Z5,

incorrect.

S3D,

orR5.

CR3, CR4, R9, AR1, dc calibration

Zl, C2, shield not installed.

4-13/4-14

lead,

8026B

Section 5

List of Replaceable Parts

5-1.

INTRODUCTION

5-2. This section contains an illustrated parts breakdown ofthe instrument. A similar
parts listing for each of the Options will be found in Section 6. Components are listed
alphanumerically by assembly. Both electrical and mechanical components are listed by
reference designation. Each listed part is shown in an accompanying illustration.

5-3.

Parts lists include the following information:

1.

Reference Designation

2.

Description of each part

3.

FLUKE Stock Number

4.

Federal Supply Code for Manufacturers (SeeTable 5-5 forCode-to-Name list)

5.

Manufacturer's Part Number

6. Total Quantity per assembly or component

7.

Recommended Quantity: This entry indicates the recommended number of
spare parts necessary to support one to five instruments for a period of two years.
This list presumes an availability of common electronic parts at the maintenance
site.

For maintenance for one year or more at an isolated site, it is recommended
that at least one of each assembly in the instrument be stocked. In the case of
optional subassemblies, plug-ins, etc., that are not always part ofthe instrument, or
are deviations from the basic instrument model, the REC QTY column lists the

recommended quantity of the item in that particular assembly.

5-4. HOW TO OBTAIN PARTS

5-5.

Components may be ordered directly from the manufacturer by using the
manufacturer's part number, orfrom the John Fluke Mfg. Co., Inc. factory or authorized
representative by using the FLUKE STOCK NUMBER. In the event the part you order
has been replaced by a new or improved part, the replacement will be accompanied by an
explanatory note and installation instructions if necessary.

5-1

8026B

5-6. To ensure prompt and efficient handling of your order, include the following
information.

1.

Quantity

2.

FLUKE Stock Number

3.

Description

4.

Reference Designation

5.

Printed Circuit Board Part Number

6. Instrument Model and Serial Number

CAUTION

Indicated devices are subject to damage by static discharge.

(X)

5-2

REF
OES

® FINAL ASSEMBLY, 8026B

FIGURE

DESCRIPTION

5-1

(8026B-TiB)

FLUKE

STOCK

NO.

MF6
8PLY
CODE

MFG

PART

NO.

TOT
OTY

REC
QTY

N
0
T
E

Al®

A2®

BT1

Fl

F2

HI
H2
K3

HPl

MP2
MPS
HPl
MPS
MP6

MP7
MP8
MP9
MP 10

MIN

PCB

ASSEMBLY

«;NUNCIATOR

BATTERY, PRIMARY
FUSE, FAST-BLO,

European type fuse

FUSE, FIBRE,
SCREIV,
SCREW, THD-FORH,
SCREW, THD-FORti,
BAIL

BRACKET,
BUTTON, FUNCTION SWITCH
BUTTON, POWER SWITCH
BUTTON, RANGE SWITCH
CASE, BOTTOM

European type Case Bottom

CASE,
CONNECTOR, ELASTOffiRIC
COVER, BATTERY
DECAL,

PCB

ASSEMBLY

9V (NOT

2A,

250V

3A, 6

PHP, 4-10 X 3/16

LCD MTG.

TOP

TOP

CASE

00V

3/8
3/1

SHOWN)

61461406

613913

116 823
376582
16 0972

175001

129882
118156
117 953
616961

531657
6

06

689
156191
6

06

871
613950
637728

512027
52085
637686
612835

8

89536

89536

83710
71100
69536

71100
89536
89536
69536
69536

89536
89536
89536
89536
89536
89536

89536
89536
89536
89536

616106

613913

NEDA

#16 01
AGX2
16

0972

BBS-3

129882
118156
117

953

616961

531657
6 06

689
156191
6 06

671
613950
637728

512027
52085

637686
612 835

1

1

1
2

10

1

5
1
2
3

1

1

1

2

1

6

1

1

8

1
1
1

1)

«

o

3

•<

00

o

lo

a>

CD

REF
DES

DESCRIPTION

FLUKE

STOCK

NO.

MF6

SPLY
CODE

MFG PART

NO.

TOT

OTY

REC

OTY

N

0
T
E

§

to

O)
ID

MP11
MP12
MP13
MP 11
MP 15

MP16
MP 17
MP18
MP IS
MP20

TH1

TM2
Ul®

U3

FLANGE, SWITCH
FOOT, NON-SKID
LENS,

DISPLAY

PLATE,

LCD MTG.

RETAINER, SHIELD

SHIELD
SHOCK ABSORBER
SPACER, CASE
SUPPORT, INPUT
TEST LEADS & PROBE

INSTRUCTION MANUAL, 8026B
OPERATOR CARD, 8026B
IC,

C-MOS,

LCD,

SCREENED

RECOMMENDED SPARE PARTS

DIV.

A-D

CONVERTER

BRACKET

(NOT

SHOWN)

KIT,

8026B

155881
6013 97

606

818
531665
651159

601389

128111
158588
655860

516666

616111
616122
129100

501321

653360

69536
89536
69536
89536
89536

69536
69536
89536
89536
69536

89536
89536
89536
69536
69536

155881

6

01397

606 816

531665

651159
6 013

89
12 6111
158588

65586
516666

616111
616122
129100
501321
653360

1

1

1

n

V

0

2

2

>

1
1

3
v

•<

o

-MP13

8026B

MP10

MP17

Figure

5-1.

8026B Final Assembly

MP9-

MP12(4)-

8026B

T&B

5-5

REF

OES

A1®

Cl
C2

C3
Cl

C5
C6

C7

C8
C9

C12
Cll
C15

C16

C17
C18
C19
CR6

CR7

CR8
J1-J3

Jl

J5

DESCRIPTION

MAIN PCB

FIGURE

CAP,
CAP,

CAP,

CAP,

CAP,
CAP,
CAP,

CAP,

CAP,
CAP,
CAP,
CAP,

CAP,
CAP,
CAP,
CAP,
DIODE,

DIODE,
DIODE,
RECEPTACLE, INPUT
JACK
CONTACT ASSEMBLY

ASSEMBLY
5-2 (60265-1001)

5 00 PF +/-10?, 1 KV

CER,
VAR,

1 .5 PF-0.25 PF, 2000V

ELECT, 22 UF +/-20% ,

AL.
MYLAR, 0.017 UF +/-10$,
POLY

, 0.1 UF +/-10S, lOOV

POLY

, 0.22 UF +/-10?, lOOV

MYLAR, 0.017 UF +/-10$,

POLY

,

0.022
VAR,
CER,
CER,
CER,

AL.

ELECT, 17 UF +/-20«,

TA,

39 UF +/-20?, 6V
CER,
CER,

SI

, RECT. 2A, 50V

, HI-SPEED SWITCHING

SI

, HI-SPEED SWITCHING

SI

DC POWER, PCB MOUNTING

UF +/-10J, 1000V

.1.5 PF-0.25 PF, 2000V

150 PF +/-5?, lOOV,
1600 PF +/-5?, 50V,

500 PF +/-10i, 1 KV

500 PF +/-10$, 1 KV

0.22 PF +/-20$, 50V

16V
OOV

OOV

NPO
NPO

10V

FLUKE

STOCK

NO.

616106

1

056 92

2182 06

611750
116773

116781
136113
116773

118163
2162 06
512966

526517

1 056

92

6 02331

163915
1

056 92
519157
317559

203323
203323
5086 06
123897

651653

MFG

SPLY
CODE

89536

71590
72982

89536
89536
69536

73115

89536

55112

72982

89536
69536

71590

69536
56289

71590

51106
05277

07910
07910

89536
89536
89536

MFG

PART

NO.

616106

2DDH6 0rJ5 01K
530-000

611750
116773

116781
C280MAH1A220K
116773

0.022/10/1000-7
530-000
512968

52 5517
2DDH6 0N501K

602331
196D396X0006KA1
2DDH6 0I1501K
RPE111Z5U221M50V

1N5100

1N1116
1N1118
5066 06
123697
651653

TOT

OTY

RLF

3

2

1

2

1
1

REF

1

REF

1
1

REF

1
1

REF

1
1

2

REF

3

1 1
1

REC
OTY

N

0
T
E

"0

o

m
>

w

CO

a
3

a

OS

o

10

o

REF

OES

HPl
MP2

MP3
MPI

MP5

FUSE

CAP

FUSE

aip

FUSE

CLIP

FUSE

SPRING (NOT SHOWN)

SPACER

DESCRIPTION

FLUKE

STOCK

NO.

510716
531925
535203

535211

6

01371

MF6

SPLY
CODE

89536
89536
89536
89536
89536

MFG PART NO.

5107 16
531925
535203

535211

6

01371

TOT
OTY

N

REC

0

T

OTY

E

1
1

1
1
1

P1-P5
Q1-Q3
01
05
Rl

R2

R3
Rl

R5

R6
R7

R8
R9

RIO

RII
R12

R13
RII

R15

POST , CONNECTOR
TRANSISTOR, SI, NPN
TRANSISTOR, SI, PNP
TRANSISTOR, J-FET,
RES,

COMP, 100K

RES,

WW, FUSIBLE, IK

P-CHANNEL

-^/-lOl,

+/-10$

EXACT REPLACEMENT ONLY.

RES,

DEP.

RES,

CAR, 2OOK

DEP.

RES,

RES,
RES,
RES,
RES,
RES,

RES,
RES,
RES,
RES,
RES,

CAR, 220K +/-5?,

VAR, 500 +/-20?, 0.3W

COHP, IM +/-10?, IW
DEP.

CAR, 200K +/-5?,
COMP, 100K +/-10$, IW
DEP.

CAR, 1.3K +/-5?,
DEP.

CAR, lOOK +/-52,

COMP, lOM

(TTL.

FILM, 1.22K +/-^%

MTL.

FILM, 3.71K +/-1$
DEP.

CAR, IK
DEP.

CAR, 6.8

+/-5$,

+/-5$,

-I-/-5?,
+/-5$,

IW

1/1W

1/1W

1/1W

, 2W

1/1W
1/1W

1/1W

1/1W
1/1W

, 1/6W
, 1/6W

6 03910
218396

195971

113690

109397

171080

111185
316953

6 03716

1 097

93

111165

109397
111576
318920

191911

168215
272096
313126
112251

69536
89536
01713
89536
01121

01121

80031
80031
51106

01121
80031

01121
80031
80031

01121
91637

91637
80031
60031

6 03910

218396
2N3906
113690
GB1031

HB1021

CR251-1-5P200K
CR251-1-5P220K

RVS07 07-V-1 00-3-501 y

OBI 051
CR251-1-5P200K

GB1031
CR251-1-5P1K3
CR251-1-5P100K

CB1065
CMF551221F

CMF553711F
CR251-1-5P1K
CR251-1-5P6E8

6

3 1
1 1
1 1

2

1 2

2

1
1

1
REF
REF

1

1

1

1 •

1
1

1

2

•<

CO

o
ro

REF

OES

R16
R17
R19
R31
R32

R33
RJI-RJI

RT1
S1-S8

S9
U2®

Ul
U5

VRl
VR2

VR3
Wl
XU1
Y1
Zl

Z2
Z3

Zl
Z6

DESCRIPTION

RES,

DEP. CAR, 10OK

RES,

VAR, IK

RES,

VAR, 100

RES,

DEP. CAR, 22K

RES,

DEP. CAR, 10OK

RES,

DEP. CAR, 10OK

VARISTOR,

ITJERKISTOR,

SWITCH ASSEMBLY
SWITCH, SLIDE

IC,

C-t-fOS,, QUAD

IC,

RMS,

IC,

RECTIFIER BRIDGE,
DIODE, BAND
DIODE, ZENER,

DIODE, ZENER,

POST, CONNECTOR
SOCKET,

CRYSTAL, QUARTZ,

RESISTOR NETWORK

RESISTOR NETWORK
RESISTOR NETWORK
RESISTOR NETWORK
RESISTOR NETWORK

+/-20$,

13 0V

P.T. C, IK

SELECTED

GAP REF.

12V

5.1V

IC,

10-PIN

-^/-20$,

+/-10?

3.2 MHZ (50 HZ)

+/-5$,

1/1W

0.3W

0.3W

+/-5$,

1/1W

*/-5%,

1/1W

+/-5$,

1/1W

+/-10$,

XOR

GATE

1 AMP

UNCOMPENSATED

§25 DEG C

FLUKE

STOCK

NO.

31692
611065
611057
31687
31692

318920
117672
116819
153617
153365

355222
637601
118582
508259
113156

683730

6

03910

12

9282
513937
515871

117680
117706
135727
117711

0

0
0

MFG

SPLY
CODE

80031
51106
51106
60031
60031

80031
09211
50157
69536
31828

027

35
69536
83

003

32293

01713

89536

89536
09922
89536
89536

89536

89536
89536
89536

MFG PART

NO.

CR251-1-5P100K

RVS07

07-V-100-3-

RVS07

07-V-100-3­CR251-1-5P22K
CR251-1-5P100K

CR251-1-5P100K

V13

0MA7B

160010200
153617
G1-116-0001-G20-

CD103

0AE

637 801

VMO 8

ITS

6935-2

1N963A

683730

6

03910
DILB10P-108
513937
515871

117680

1177

06

•

135727

117711

• 1 02H

-101H

•52

TOT
OTY

REF

REF
REF

REF

CO

REC
OTY

N

0
T
E

o

lO

1
1
1

2

e

Ul

1

8
1

I

lO

S

•o

o

1
1
1

1

1
1

OB

>

M

«
3

2

><

8026B

•

a.

K

V

8026B-1601

Figure 5-2. Al Main PCB Assembly

5-9

V

O

REF

DES

A2®

DESCRIPTION

ANNUNCIATOR PCB ASSEMBLY

FIGURE 5-3 (8020B-1002T)

FLUKE
STOCK

NO.

613913

MFG

SPLY
CODE

89536

613943

MFG PART NO.

TOT
OTY

REF

REC
OTY

N

0
T
E

g

lO
03

AR20

C20

C21
J20
J21
LS1
R21

R22
R23
R21
R25
R26

R27
R28

U20®

LO PWR

J-FET

IC,

CER, 0.22 UF

CAP,

CAP,

CER, 150 PF +/-10?, SOV
RECEPTACLE, SINGLE
SOCKET, 1-PIN
TRANSDUCER, AUDIO
RES,

DEP.

CAR, 200K +/-5$, 1/1W

DEP.

RES,
RES,
RES,
RES,
RES,

RES,
RES,

IC,

CAR, 18K +/-5$, 1/1W

DEP.

CAR, 200K

DEP.

CAR, 100K +/-5?, 1/4W

DEP.

CAR, 200K +/-5$, 1/4W

DEP.

CAR, 200K

COMP, 10M •*-/-5'i, 1/4W
DEP.

CAR, IM

C-MOS, QUAD

INPUT OP AMP

+/-20J,

•^/-5$,

2-INPUT

+/-5J,

+/-5J,

1/4W

NAND GATE

50V

1/1W

1/4W

604363

519157
611032

614396
417311

602190
441485

348862
441485
348920
441485
411485

194944
348987
418509

89536

51406

89536

22526

30035
51406
80031

80031

.CR251-4-5P200K

80031
80031
80031
80031

01121

80031
12040

604363
RPE111Z5U224M50V

614032
75377-001
SS-109-1-04
EFB-RD24C01
CR251-4-5P200K

CR251-4-5P18K

CR251-4-5P100K
CR251-4-5P200K
CR251-4-5P200K

CB1065
CR251-4-5P1M

MM74C00N

1

1

1
1

1
1
1
1

1

REF

1
REF
REF

1

1

1

1

2
«

ox

•

>

M

>

•o

o

o
>

S

n
3
2

><

u u u u u u u

8026B

-{mZD-

R28

C20

Figure 5-3. A2 Annunciator PCB Assembly

8026B-1602

5-11

8026B

Table 5-4. Federal Supply Codes for Manufacturers

01121
Allen-Bradley Co.
Milwaukee, Wisconsin

02735
Replaces 18725
RCA - Solid State Div.
Somerville, New Jersey

04713

Motorola Inc.
Semiconductor Group
Phoenix. Arizona

05277

Westinghouse Electric Corp.

Semiconductor Division
Voungwood, Pennsylvania

07263

Fairchild Camera & Instmment Corp.
Semiconductor Division
Mountain View, California

07910
Replaced by 15818

09214
General Electric Co.
Semiconductor Products

Power Component Operation
Auburn,

New York

09922

Burndy Corp.
Norwalk, Connecticut

12040
National Semiconductor Corp.

Danbury, Connecticut

14099
Semtech Corp.
Newbury Park, California

15818
Teledyne Semiconductors

Formerly Ameico Semiconductor
Mountain View, California

18736
Voltronics Corp.
Hanover, New Jersey

19647
Caddock Electronics Inc.
Riverside, California

22526
DuPont, El DeNemours & Co. Inc.
Berg Electronics Div.
New Cumberland, Pennsylvania

30035
Jol Industries Inc.
Garden Grove. California

50157
Midwest Components Inc.
Muskegon, Mississippi

51404
Corning Glass Works
Medical & Scientific Instruments
Medfield,

Maryland

51406
Murata Corporation of America
Marietta, Georgia

52763
Stettner-Trush Inc.

Cazenovia. New York
56289

Sprague Electric Co.
North Adams, Massachusetts

71400
Bussman Manufacturing
Div. of McGraw-Edison Co.
St. Louis, Missouri

71590
Centrelab Electronics

. Div. of Globe Union Inc.

Milwaukee, Wisconsin

.72136 •

Electro Motive Mfg. Co.
Florence, South Carolina

72982

Erie Technical Products Inc.
Erie,

Pennsylvania

73445
Amperex Electronic Corp.
Hicksville, New York

75915
Littlefuse Inc.
Des Plaines, Illinois

5-12

Table 5-4. Federal Supply Codes for Manufacturers (cont)

8026B

79727

C-W Industries
Warminster, Pennsylvania

80031
Mepco/Electra Corp.
Morristown, New Jersey

84411
TRW Electronic Components
TRW Capacitors
Ogallala, Nebraska

89536

John Fluke Manufacturing Co.,
Everett, Washington

Inc.

5-13/5-14

8026B

Section 6

Accessory Information

6-1.

INTRODUCTION

6-2. This section of the manual contains information concerning the accessories
available for use with the Model 8026B Digital Multimeter. Each accessory, as shown in

Figure 6-1. is described in general terms under a .separate major heading containing the
accessory model number. The depth of detail is intended to give the prospective user an
adequate first acquaintance with the features and capabilities of each accessory.
Additional information, when necessary, is supplied with the accessory.

6-3. DELUXE CARRYING CASE (C90)

6-4. the C90 Deluxe Carrying Case is a pliable, vinyl, zipper-closed pouch that provides

in-field-lransport protection for the 8026B as well as convenient storage location.s (or lest

leads,

operator guide and other small accessories. A finger- or belt-loop is included on the

case as a carrying convenience.

6-5. TEMPERATURE PROBES (80T-150C and 80T-150F)
6-6. Introduction

6-7. The 801-150 Temperature Probe converts the instrument into a direct-reading (I

mV dc/°) °C (80r-150C) or •^• (80 I-150F) thermometer. It is ideally suited for surface,
ambient, and liquid measurements and lends itself easily to a wide range of design,

troubleshooting, and evaluation applications. A rugged, fast-responding jirobe-tip with a

350 V dc standoff makes the 801-150 one ofthe most versatile and easy-to-use temperature

probes available.

6-8. Specifications

RANCiK ("C/°l-) (field selectable by
internal jumpers)
ACCURACY ±rC (1.8''F) from 0°C to lOO^C, decreasing

RESOLUTION 0.1°C on 200 mV range
VOLTAGE STA\l50f F 350V dc or peak ac
POWER Internal disposable battery; 1,000 hours of

-50^ C to +150'=C or

linearly to ±3°C (5.4"F) at -50°C and +15()"C

continuous use

58"

F to

302°

1-

6-1

8026B

i^ 80K-6

6-2

Y8101

Figure

6-1.

8026B Accessories

80J-10

Y8100

r

'^ W. Ml)]

Y8140 vx <<5=^-::;:^''-^

..•:..'ft*^

'',;< 83RF

.vi>'"

\ 85RF ^l^

8026B

C90

-^
^.

80K-40

•<t>

Figure

Y8134

6-1.

8026B Accessories (cont)

6-3

8026B

6-9. CURRENT TRANSFORMER (801-600)
6-10. Introduction

6-11.

The Model 801-600 extends the maximum 2A ac current measuring capability of
the instrument up to a maximum of 600 amps. A clamp-on transformer designed into the
probe allows measurements to be made without breaking the circuit under test. In use, the
current carrying conductor being measured serves as the transformer's primary, while the
801-600 serves as the secondary. Because of a high efficiency, quadrature type of winding,
wire size and location of the conductor within the transformer jaws do not affect the
accuracy of the current measurement.

6-12. Specifications

RANGE I to 600A ac

ACCURACY ±3%

FREQI;I;NCY
DIVISION RATIO 1000:1
INSULAIION 5kV
MA.XIMUM CONDUCTOR SIZE 2-inch diameter

6-13. HIGH VOLTAGE PROBE (80K-6)

6-14. Introduction

6-15.

The 80K-6 is a high voltage probe designed to extend the voltage measuring
capability of an ac dc voltmeter to 6000 volts. A 1000:1 voltage divider provides the probe

with a high input impedance. The divider also provides high accuracy when used with a
voltmeter having a 10 megohm input impedance. A molded plastic body houses the divider
and protects the user from the voltage being measured.

6-16. Specifications

VOLTAGE RANGE 0 to 6 kV, dc or peak ac
INPUT IMPEDANCE 75 megohms nominal
DIVISION RAIIO 1000:1

ACCURACY

DC to 500 Hz ±1%
500 Hz to I kHz ±2%

Above I kHz Output reading falls. Typically.

Ri;SI'ONSE .lO Hz to l kHz. lO kHz typical

-30';';,

at 10 kHz.

6-17. HIGH VOLTAGE PROBE (80K-40)
6-18. Introduction

6-19. The Model 80K-40 extends the voltage measurement capability ofthe instrument

up to 40 kV. Internally, the probe contains a special I0(X):I resistive divider. Metal-film
resistors with matched temperature coefficients comprise the divider, and provide the
probe with its excellent accuracy and stability characteristics. Also, an unusually high
input impedance (10(X) Mn) minimizes circuit loading, and thereby contributes to
measurement accuracy.

6-20. Specifications

VOLTAGE RANGE I kV to 40 kV dc or peak ac. 28 kV rms ac
INPUT RESISTANCE 1000 Mil

DIVISION RAIIO 1000:1
ACCURACY DC (OVERALL) .. 20 kV to 30 kV ±2% (calibrated at 25 kV)

UPPER LIMIT Changes linearly from 2% at 30 kV to 4% at 40 kV

6-4

8026B

LOWER LIMII Changes linearly from 2% at 20 kV to 4%at I kV

ACCURACY AC (OVERALL) ±5% at 60 Hz

6-21.

HIGH FREQUENCY PROBE (83RF)

6-22. Introduction

6-23.

The 83 RF Probe extends the frequency range ofthe DM Ms voltage measurement

capability to include 100 kHz to 100 MHz inputs from 0.25 to 30V rms. Ihc probe operates

in conjunction with the 8026B dc voltage ranges, and provides a dc output that is
calibrated to be equivalent to the rms value of a sinewave input.

6-24. Specifications

FREQUENCY RESPONSE ±1 dBfrom lOOkHzto

transfer ratio)

AC-TO-DC 1 RANSFER RAHO

(23 ±5°C) RMS Input DC Output

(IOO kHz)

0.25-0.5V 0.25-0.5V ±1.5 dB

0.5 - 2.0V 0.5 - 2.0V ±0.5 dB

2.0-30V 2.0-30V ±1.0 dB

EXTENDED FREQUENCY

RESPONSE Useful for relative readings from 20 kHz to 250

MHz.

RESPONSE Responds to peak value of input; calibrated to

read the rms value of a sine wave.

VOLTAGE RANGE 0.25 to .30V dc

MAXIMUM DC INPUT 200V dc

TEMPERATURE COEFFICIENT

(0 to 18°C. 28 to 50°F) ±0.1 of ac-to-dc transfer ratio specifications per

°C

INPU I CAPACn ANCE <5 pF

IOO

MHz(relalivetoac/dc

6-25. HIGH FREQUENCY PROBE (85RF)
6-26. Introduction

6-27. I he Model 85RF' High Frequency Probe allows measurements over a frequency
range of IOO kHz to 500 MHz from .25V to 30V rms. It operates in conjunction wilh the
instruments dc voltage ranges and provides a dc output that is calibrated to be equivalent
to the rms value of a sinewave input.

6-28. Specifications
FREQUENCY RESPONSE

100

kHz to 100 MHz ±0.5 dB

100 MHz to 200 MHz ±L0 dB

200 MHz to 500 MHz ±3.0 dB
EXTENDED FREQUENCY
RESPONSE Useful for relative readings from 20 kHz to 700

RESPONSE Responds to peak value of input; calibrated to

VOLTAGE RANGE 0.25V dc to 30V rms

MHz.

read rtns value of a sine wave.

6-5

8026B

MAXIMUM DC INPUT 200V dc

INPUT CAPACITANCE <5 pF
AC-TO-DC TRANSFER RATIO . 1:1
RATIO ACCURACY 0.5 dB at 10 MHz

6-29. BATTERY ELIMINATOR (A81-115)

6-30. The A8I Battery Eliminator converts the 8026B from battery to ac-line operation.

It is available in a variety of line-power configurations, as shown in Table 6-1. When
connected to the 8026B it effectively removes and replaces the output ofthe battery. The
battery does not need to be removed from the circuit.

WARNING

DO

NOT SUBSTITUTE A CALCULATOR

THE A81. THESE UNITS DO NOT PROVIDE THE PROTECTION

NECESSARY FOR COMMON MODE MEASUREMENTS UP TO SOOV DC.
ALWAYS USE THE MODEL

A81

TYPE

BATTERY ELIMINATOR

FOR AC-LINE OPERATION.

NOTE

FOR

The "BV indicator may come on when using the

the operation of the 8026B.

6-31.

CURRENT SHUNT (80J-10)

6>32.

Introduction

6-33.

The Model 80J-I0 Current Shunt extends the current measuring capability ofthe
DMM to 10 amps continuous (20 amps for periods not exceeding one minute) dc to 10
kHz at an accuracy of ±0.25% in excess of the voUmeter accuracy.

Table

6-1.

A81 Model Numbers and Input Power

MODEL NO.

A81-100
A81-115

A81-230-1

A81-230

100V ac ±10%, 48 to 62 Hz

115V ac ±10%, 48 to 62 Hz
230V ac ±10%, 48 to 62 Hz (U.S. type plug)

230V ac ±10%, 48 to 62 Hz (European type plug)

A81.

This does not affect

INPUT POWER

6-6

8026B

6-34. Specifications

SHUNT 10 amps at 100 mV
ACCURACY (I8°C to 28°C)

DC to 10 kHz ±0.25%

10 kHz-IOO kHz Rising to 1 dB at IOO kHz typical
TEMPERATURE COEFFICIENT 0.005%/''C
INDUCTANCE 8.3 nH in series w/O.Oin shunt

OVERLOAD Up to one minute at 20A with a I /4 duty cycle for

CONNECTS TO 3/4 inch center banana jacks
CONNECTORS 5-way binding posts (red and black)

6-35. AC/DC CURRENT PROBE (Y8100)
6-36. Introduction

6-37. The Fluke Y8100 AC/DC Current Probe is a clamp-on probe that is used with a
voltmeter, multimeter, or oscilloscope to read dc, ac. or composite (ac on dc) current
measurements. The jaws on the Y8100 are designed to clamp around conductors up to 3/4
inch in diameter. The pistol shape allows safe, easy, one-hand operation when making

current measurements.

recovery after currents between lOA and 20A

6-38. The Model Y8100 probe is battery powered with size A A
to 200A dc or ac rms using most any voltmeter. Two ranges,20A and 200A, produce a 2V
output at full-range current.

6-39. Specifications

RANGES 20A ac or dc

RATED OUTPUT 2V at full range

ACCURACY

DC to 200 Hz ±2% of range
200 Hz to 1 kHz <IOOA add ±3% reading

CALIBRATION CYCLE I year
FREQUENCY RESPONSE dc to 1.0 kHz
RECOMMENDED LOAD >3.0 kn

TEMPERATURE RANGE +I5°C to +35°C; for specified accuracy -IO°C to

HEATING LIMITATION Prolonged operation above 200A ac or 1 kHz can

WORKING VOLTAGE RATING . Core to output; 600V dc or 480V ac maximum

APERTURE SIZE 3/4'(19 mm) diameter
SIZE-OVERALL 9''x4-I/2"x
WEIGHT 14 ounces (0.4 kg), with batteries
POWER Battery, four AA cells
BATTERY LIFE Alkalinc-20 hours continuous

200A ac or dc

>IOOA add ±6% reading

+50°C; storage and operation at reduced
accuracy.

cause damage to the Y8I00.

output to ground; 42V dc or 30V ac

1-7/16'(230

cells.

It measures current

mm x 115 mmx 37 mm)

6-7

8020B

6-40. AC CURRENT TRANSFORMER (Y8101)
6-41.

Introduction

6-42. The M odel Y8101 (Figure 6-1) is a small clamp-on current transformer designed to
extend the current measuring capability of an ac current meter up to 150 amperes. A
clamp-on coil designed into the probe allows measurements to be made without breaking

the circuit under test. This coil serves as the secondary of a
current-carrying conductor being measured serves as the primary.

6-43. Specifications

CURRENT RANGE 2A to 150A

ACCURACY, (48 Hz TO 10 kHz) . ±8%, 2A to lOA

DIVISION RATIO 1000:1
WORKING VOLTAGE 300V ac rms maximum

INSULATION DIELECTRIC

WITHSTAND VOLTAGE 3 kV rms

MAXIMUM CONDUCTOR SIZE 7/16" (I.I I cm)

6-44. SAFETY DESIGNED TEST LEAD SET (Y8132)

6-45.

This test lead set is equivalent to the set originally supplied with the 8026B
multimeter. The set includes one red and one black test lead. Each probe has an anti-slip
shoulder near the test tip and is connected to the multimeter via a safety-designed
shrouded banana connector. This set will fit John Fluke instruments with safety-designed
input jacks.

6-46. DELUXE TEST LEAD SET (Y8134)

6-47. The Y8I34 is a deluxe test lead set. The attachments provided allow
interconnection with a wide variety of leads and electronic components. Included in the kit
are:

1.

Two test leads (one red and one black). The Y8134 leads have a shrouded

banana connectors on each end.

2.

Two test probes

3.

Two insulated alligator clips

4.

Two spade lugs

5.

One squeeze hook

6. One test lead pouch

7.

One instruction sheet

±2%,

lOA to 150A

1:1000

transformer. Ihe

6-48. SLIM FLEX TEST LEAD SET (Y8140)

6-49. The Y8I40 Test Lead Set (Figure 6-1) consists of one red and one black 60-inch
(1.52 meter) test lead, each with a standard banana plug on one end and an extendable tip
probe on the other end. This fiexible metallic tip conductor may be extended up to 2.5
inches and is insulated to within 0.1 inch of its tip. This insulation reduces the chance of
creating an inadvertent short circuit while using the probes in their extended
configuration. Intended primarily for measuring voltages, the Y8I40 leads may also be
used for measuring modest currents.

6-8

8026B

Section 7

Schematic Diagrams

TABLE OF CONTENTS

FIGURE TITLE PAGE

7-1.

8026B 7-2

7-2.

U 1

7-3. AC Converter 7-7

and U3, A/D Converter and Display 7-6

7-1

8026B

7-2

Figure

7-1.

8026B-1601

Al Main PCB Assembly

8026B

/>- ^-{R2J0-

/

i^

r\ n n T\ n n

a

Tl

u u u u u u

^6Q

c

J2I-I —.^^ C

\

lP.2a

(~\ ll 1

LS 1

UZO

/ o

(J

8026B

J2I-2 -__,^

?A

:Jj]

J2I-3 —-^^

- J, ^' \

J

21

- 4 —^ ^

j2o-^

J TR2S

-llR2l

-1

^/' I

Figure

AR J

;

d

7-1.

20 1 n

]

8026B-1602

A2 Annunciator PCB Assembly

8026B (cont)

7-3

8026B

^P«KMlNt3'

Rt l^ ft l-u^^ftLE
Ftl^itiTOR. E.VACT 8,t^'L(N(.tN">E.WT
CNL.N .

LH.^T

NO l)<.tD

aRlO

LSI
5T\
C-i-i

Cia

Fl

^^

p^

JLO

I MQ,). M&T US6.0

VM

a5

Rbb

-.J4

roOTE^: uNLLSSOTHtRiWAE-iPECIflEO

I. ftLL RL'il'^.TOR /'^LU£i AE.t IS OHWi.

l.ALL ilAl^hLlTOR JM.U£*i ARe m

WlCKOFARMiS.

^1 ­Sl'

•>i L
...A-70 S^M^OWIIB. ON-OFF
'."i = irin

] C.lD.".'b Kia.bO

.()

li,

CV^I-5 .Jlo-i^

li-j,.

so,- IK

.1 'j"l slOMtL,

-JB'

AC-DC

7-4

J*

aATTEV(-l

tuMINATOR

8026B

iVn

- NC (normally clospd)

- Wiper

- NO (normally opt^nj

>) Co o o)

(p~

"o 5) Co O O) I

1(0 Q o) 12. 'o~d) (o o~5) (2lp__c^.

I switches are stiown on the schematic m ihc ' out' position

B D F H

Figure

7-1.

8026B (cont)

'

8026B-1201

7-5

8026B

1^

1 tVoo

f^ -Vss

LIQUID

CRYSTAL

DISPLAY

•

~£g3Gr^"

. A1 O ',-f^ 1

\ 3I 3I ? -

>'^GZSxl3

-•-•-.-..-.- ^

••

•.-.-•.-.-•-•-•: a

• -^ S2

JTr''^-^

•

|_lt"~f;

^C£2_^ E 2^

X

/~^--.----.r<3

/.-Z^6i _iLrT-> '

•••• t ? f;

,.---. . gp,

•'•^snA::^^

8026B

•

CPIOO

U3

%

BACKPLANE

Figure 7-2. Ul and U3, A/D Converter and Display

7-7

VDD

s

FROM y .

S8D V'^'-lt^^

iS-

c

>

O

o

o

a

<

a

J!fi""^'

R12

(RSCALE-IN)

U4 AC CONVERTER

r

.R14

VDD

>. J DEAD- ,

">—I BAND M

P^ *A CIRCUIT '

DEAD-

BAND

CIRCUIT

VDD

-ABSOLUTE VALUE CIRCUIT-

tn

R15|

(Re)\_,

'R9

TURN-ON
AND BIAS

CIRCUIT

LOG-

ANTILOG

CIRCUIT

(RSCALE-OUT)I

1*

(CAVERAGE)

R6,R10

^ » V\^ • »
'OUTV

• R13

C7=:

,R17,

R19

VQUT

T0U1,
PIN 30

8026B

Appendix A

Manual Change and Backdating

Information

INTRODUCTION

This appendix contains information necessary to backdate the manual to conform with

•earlier pcb configuations. lo identity the configuration of the pcbs used in your
instrument, refer to the revision letter I marked in ink) on the component side of each pcb
assembly, lable A-1 defines the assembly revision levels documented in this manual.

NEWER INSTRUMENTS

As changes and improvements arc made to Ihe instrument, they are identified by
incrementing the revision letter marked on the affected pcb assembly. These changes arc

documented on a supplemental change/errata sheet which, when applicable, is inserted at

the front of the manual.

OLDER INSTRUMENTS

To backdate this manual to conform with an earlier assembly revision level, perform the
changes indicated in Table A-1.

CHANGES

There are no backdating changes al this printing. All pcb assemblies arc documented at
their original revision level.

Table

A-1.

Manual Status and Backdating Information

Rst

Ot

Option

No.

Al

MAIN PCB ASSEMBLY

ANNUNCIATOR PCB

A2

ASSEMBLY

AtMmbly

Nime

646406

. X - Th* PCB ,««iiion tavalt dc

* • TlMM reviiion Itt1«n w«ra

-, No raviKon l«taf on Iha P

• To adapt manual to eaflier rev configurations perform changes

Fluke

in desenrjjng order Iby no.l. ending with change under desired rm letter

P.rt

A

B

C

D

E

•

•

X

riBTi

CB.

F G -H

X

•d in thi\ msnual.

•r u

Md in tlw imtrumanl.

J K L M N P

No.

613943

-

•

•

-

•

•

'

A-1

8026B

WARRANTY

Notwithstanding any provision of any agreement the following warranty is exclusive:

The JOHN FLUKE MFG. CO. INC.. warrants each instrument is manufactures to be free from defects in material and
workmanship under normal use and service for the period of 2 years from date of purchase This warranty extends only
to the original purchaser. This warranty shall not apply lo fuses, disposable batteries (rechargable 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 ttie event of failure ot a product covered by this warranty. John Fluke Mtg. Co Inc., will repair and calibrate an
instrument returned to an authorized Service Facility within 2 years from date of purchase: provided the warrantor's
examination discli3ses to its satisfaction that the product was defective. The warrantor may. at its option, replace the
product in lieu of repair. With regard to any instrument returned within 2 years of the original purchase, said repairs or

replacement will be made without charge. If the failure has been caused by misuse, neglect, accident, or abnormal
conditions of operations, repairs will be billed at a nominal cost. In such case, an estimate will be substituted before
work IS started, if requested

THE FOREGOING WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES. EXPRESS OR IMPLIED

INCLUDING BUT NOT LIMITTED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY. FITNESS.
OR ADEQUACY FOR ANY PARTICULAR PURPOSE OR USE. JOHN FLUKE MFG. CO INC.. SHALL
NOT BE LIABLE FOR ANY SPECIAL. INCIDENTAL. OR CONSEQUENTIAL DAMAGES. WHETHER IN

CONTRACT, TORT. OR OTHERWISE.

it any failure occuri, ttw following step* •houW be taken:

1.

Notify the JOHN FLUKE MFG. CO. (NC. or nearest Servicefacility, givmg full details of the difficulty, and
include the model number, type number, and serial number Qn 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 t>e
made at the Service Facility and the instrument returned, transportation prepaid.

SHIPPING TO MANUFACTURER FOR REPAIR OR ADJUSTMENT

All shipments of JOHN FLUKE MFG. CO INC., instruments should be made via United Parcel Service or ;'Best Way"
prepaid.

The instrument should be shipped in the original packing carton; or if it is not available, use any suitable

container that is rigid and of adequate size and surrounded with at least four inches of excelsior or similiar shock­absorbing material.

CLAIM FOR DAMAGE IN SHIPMENT TO ORIGINAL PURCHASER

The instrument should bo thoroughly inspected immediately upon original delivery to purchaser. All material m the
container should be checked against the enclosed packing list. The manufacturer will not be responsible for shortages
against the packing sheet unless notified immediately. Ittheinstrument is damaged in any way. a claim should be fited

with the carrier immediately. (To obtain a quotation to repair shipment damage, contact the nearest Fluke Technical

Center) Final claim and negotiations with the carrier must be completed by the customer

The JOHN FLUKE MFG. CO. INC.. will be happy to answer all applications or use questions, which will enhance your
use of this instrument Please address your requests or correspondence to: JOHN FLUKE MFG. CO. INC., P.O. BOX
C9090.

EVERETT, WASHINGTON 98206, ATTN: Sales Dept. For European Customers. Fluke (Holland) B.V . P 0 Box

5053.

5004 EB. Tilburg. The Netherlands.

'For European customers. Air Freight prepaid.

John Ftuke Mtg. Co. Inc., P.O. Box C9090, Everett Washington 98206

Rev 6/81

A-2

U.S. SALES AREAS for ail Fluke products

HI,

AK, AfictMrag*

Harry Lang & Auociates

1371 Hlllcrmt Drive II303

Anctionge, AK 99503

(907)27d-5741

AL.Hunttvin«

John Fluke Mfg Co.. Inc.
3322 S. Memorial PirkwaV
Suite 98
Huntsvil[«.

AL 35001

[phone]

AZ,Ttmp«

John Fluke Mfg. Co.. Inc
2125 S. 4Bth Street
Suite 104
Tempe, AZ 85282
[phone]
Tucson
{&i2\

790-3881

CA.LotAnffSlM

John Fluke MIg. Co , Inc

20902 South Bonlta St

- Carson, CA 90746
(213) 53ft-3900

or [phone]
SsnOlego

John Fluke Mtg. Co , Inc.
9601 Aero Drive. Suite 290
San Oiego. CA 92123
[phone]
Santa Clars

John Fluke Mfg. Co., Inc.
2300 Walsh Ave.. Bldg. K

Santa Clara. CA 95051
[phone]

TusUn
John Fluke Mtg. Co . Inc.
15445 Red Hill Ave . Suite F

Tustin,

CA 92680

[phone]

CO,

Denver

John Fluke Mtg. Co , inc.

1980 South Quebec Sl. #4

Denver. CO 80231
[phone]

CT,

Hertford
John Fluke Mtg. Co , Inc.
Glen Locken Esst
41-C Naw London Turnpike
Glastonbury. CT 08033

. [phone]
FL,OftuidO

John Fluke Mfg. Co.,Inc.
940 N. Fern Creek Ave.
Orlando. FL 32803

[phone]

QA Atlanta

John Ftuke Mfg. Co , Inc.
2700 Delk Rd.. Suite 250

.- Mariens. GA 30067

• [phone]

Honolulu
EMC Corporation
2979 Ualena St
Honolulu,

HI 96819

[phone]

(A Iowa CHy

[phone]

IL,

Chicago
John Fluke Mfg. Co., Inc.
3740 Industrial Ave.
Rolling Meadows. IL 80006

•(312) 398-(J850

IN.

IndtafwpoHs

John Fluke Mfg Co , Inc.

877 Purdue

Suite 101
Indianapolis, IN 46268

[phone]

K8,

Kansas City
John Fluke Mtg. <I^ . Inc
4550 W. 109th St.. Suite 130
Shawnee Mrssion, KA 66211

[phone]

LA, Nm Ortaans

[phone]

HA, Burlington

John Fluke Mtg. Co.. Inc
25 "B" Street
Burlington MA 01803

[phone]

MD,

Baltimore

[phone]

Rockville
John Fluke Mfg Co., Inc.
5640 Fishers Lane
Rockville, MD 20652

[phone]

Ml,

Detroit

John Fluke M(g Co . inc.

13955 Farmmgton Rd.

Livonia, Ml 46154
[phone]
John Fluke Mfg Co . inc
1801 E. 79lhSt.. Suite 9
Bloomington, MN 55420
[phone]

HO,

81.

Louis
John Fluke Mtg. Co., Inc.
2029 Woodland Psrkway
Suite 105

St. LOUIS. UO 63141

[phone]

NC,

Qroansbora
John Fluke Mtg. Co.. Inc.
1310 Beaman Place
Greerafooro, NC 27408

(919) 273-191B

NJ.

Partmus
John Fluke Mtg. Co.. Inc.
P.O. 80x930

West 75 Century Rood

Parsmus, NJ 07652
[phone]

NH.

Albuquerque

John Fluke Mtg. Co , Inc.

1106 Atvsfsdo Drive NE.

AltMjquerque, NM 07110

[phone]

NY, Rochester

John Fluke Mtg. Co.. inc.

4515 Culver Road
Rochester, NY 14622

[phone]

OH.CIevalsnd

John Fluke Mfg. Co , Inc.
7830 Freeway Circle
Middleburg Heights, OH 44130
[phone]
CohantMis
[phone]
Dayton

John Fluke Mig Co.. Inc.
4756Fi8hburgRd.
Dayton,

OH 45424

[phone]

OR. Portland

John Fluke Mfg. Co., Inc
18360 S W. Springfield Lane
Aloha.

OR 97007

[phone]

PA. PtOlwWphla

John Fluke Mtg. Co.. Inc.

1010 West 8th Ave . Suite H

King of Prussia. PA 19406
[phone]
PIttslHjrgt)
[phone]

The following low-cost Instruments...

are stocked locally and sold by the authorized Distributors listed

on the other side ot this stMOt. as well as t>y itte sales offices shown.

Handheld DHH's: 8020B, 8021B. 8022B, 6024B, 80268. 8060A. 8062A
PortaUa DHH's:
DIeltsI Counter*: lOOOA, 1910A. 1911A. 1912A
Digital Ttwmomelsrs: 2160- and 2170 - Series

All other instruments are sold t>y the sales offices only.

TX, Austm

John Fluke Mtg. Co.. Inc.
Creek Gardens, Suite 103
8705 ShoaJ Creek
Austin.

John Fluke Mtg. Co.. inc.

Dallas, TX 75234

John Fluke Mfg. Co , Inc.
4240 Blue Bonnet Dr
Stafford.
[phone]

San Antonio
John Fluke Mtg. Co., inc.

San Antonio, TX 78216

UT,

John Fluke Mfg Co., Inc.
5226 So. 300 West, Suite #2
Salt Lake City. UT 84107

[phone]

WASwtUe

John Fluke Mfg Ck), Inc.
5020 148th Ave. NE.
Suite tti 10
Redmorxl.
(206)881-^66

Service C«ntor Areas

CA, Bwbenk [phone]
CA SanU Clara [phone]
CO,
FL,

IL,
MA Burlington [phone]
HD.
NJ,
TX, Dallas [phone]
WA, Evaratt [phone]

eOOOA,

dOlOA. 8012A, 6030A, 8040A. 60S0A

Blvd.

TX 78756
[phone]
Dallas

14400 Midway Road

[phone]

TX 77477

10417 Quitdale

[phone]

Salt Laks City

WA 9S052

Danvar [phone]

Orlando [phone]

Chicago [phone]

RocMBe [phone]

Parsmus [phone]

For more information ort Fluke products or Sslet Offices you may dial (600)
From

Alaska,

Hawaii,

or Washington, phone [phone]. From Canada and other countries phone [phone].

f^r^^^^^l Jo^"
I^LLJICfel Fluke (Holland) B.V., P 0. Box 5053. 5004 EB. Tilburg. The Netherlands. Phone [phone]

-® Litho in

P'"**®

Mfg. Co.. Inc.. P.O. Box C9090. Everett. WA 98206

U.S.A.

426-0381

tdi-f

re*

In

most of the

U.S.A.

INTERNATIONAL SALES OFFICES

Coasin.

S A
Virrvv 0*1 Pino 4071
Buanoi Aim, Arpamma
Tol 552-S34a. TLX 22204
AuMraOa*
Elmettco IntTrumenli Pty Ltd
P O. Box 30. Concord NSW
Australia 2137
Tol (2) r3S-28«0. TLX (7901 25887

Eimeasco Instrumerti Ply Lid
21-23 Anthony Drive
Wt Wcverly Vie 3149
Auttrllia
Tet 233-4044. TLX- (7901 36206

Etm««Ko Instrumenu Pty Ltd
Proleuional Suites Stdg
G P O Box 2360
Brisbane. 4001. Auiiralia
Tal [phone]

Elmatsco Iniirumwils Pty Lid
GPO Box 1240. Adaluda
Soutn Auitraiia 5001
Tel [phone]

Elmatsco Instnjmants Pty Ltd
PO Bon 95 Goirtaiis

WMt AustraiiaeiiO

TBI (09) 3S8-3382

Auatrtie

Waller Rakiricr^
Elekironiscne Oaratt QmbH S Co

Vertriot) KG
OMrngnu 28

Tel [phone]. TLX 134759

Molharland Cotporation
24 Hst^noia Rd . Tihaiui
Dacca 3. Bangladash
Tel 257249 Of 255776

Fluke (Belgium) s A /N V.

6. Rue d« Geneva
1140 Bruateli. Belgium
TH (2) 2164090. TLX: 26312

BoUria •
Coasin Bolivia SR L

Caaina 7295. La Pa^. Bolivia

Tai 40962 TLX: 3233

BruU •

Fluke Brasil-lnouatria E
Commefcio LTDA
Al Amazonn 422.
AlpTiaviite. Baiueri.
CEP 06400 Sao Pauk) Brazil
Te*

l011M!1'S477. TLX 01135589

Fluke Braaii-tnduitria E

CommercH) LTDA
Av Hennqu* ValadarM. 23/401
Rio dm Janeiro. Brazil

Tal 252-1297
DruiMt •

Rank QConnwi (PTEl Limited
No 8. BK D
Surln Stiop HouM Complex
Mile I Jalong Tutong
Bendai Sen Begawan. Brunei

Tel 26680

euigarla*

AmtMt Assoaates Lid
Clarence Houie. 31. Clarence St
SUinM.

MKMleMk TW18 4SY
Ignited Kirfgdom
Te< (784) 63555. TLX. 92S855

Allan Crettrtord AsiOc.. Ltd.

• 14

1035 30ri Ave NE

Calsary. Alberta T2E 6Z5

lei (403)

230-1341.

Allan Crawford Aisoc. Ltd

PC Beg 3067

Poitai Station ~0~
Edmonton Alberia T5L 4K1
Tel [phone]

Allen Crswiord Aaioc . Lid
3795 William Streei
Burnury. Bnliin Cutumbia V5C 3H3

Tol [phone]. TLX CM-54247
Allan Crewlord AtMC . Ltd.

B81 Ledy Ellen Place
OttBwa. Ontario KIZ 5L3 '

Tel (613) 722-''682. TLX 0533600
Allan Crenviord Assoc . Ltd

6503 Nonriarr Drrve
Mtisissauoa. Ontario L4V 1J2
Tal [phone]. TLX'06068769

Allan Ciawtord Asaoc.. Ltd.

791S cote de Lieise
St Laureni. Quebec H4T 1E7

Tel (514) ;31-85«4. TLX 0S824944

CtMda
Fluke (Holland) BV
PO Boi 5053. 5004 EBTiiDurg
Zevenheuvetenweg 53. 5048 AN Tilburg
The Nathorlsnds
Tol [phone] TLX 52237

Ctrilee
intronica Chile Ltda
Mvual Monti 024 - Ot. D
Casilla 16228. Santiago 9. Ctuia
Tal 44940. TLX' 240301

Attn Intronica Chile
CMna.
Fluke Inlerrulional Corporation

PO Box C9090
Everen.WA 38206. USA.
Tel [phone]
TLX 152662 JOHN FLUKE EVT
ColotnbUe
StUennes E InstrumanlKion. Ltda
Carrera 13. No 37-43. Of 401
Ap Aereo 29583
Bogota DE. Colombia SA
Tel [phone].

Cypnne

Ctun Radiovision Ltd
P O Box 1969. NiCOtia. Cyprus
Tal

00121.

Amteat Associates Ltd
CJtrance House. 31. Ctaronce St.
Siainea, Middlesex TW18 4&Y
United Kingdom
Tel [phone]. TLX. 326055

TageOlsen A/S
Ballerup Byvei 222 '
DK - 3750 Ballerup. Denmvk

Tel

(2)058111.

Proieco Coasm Cia . Ltda
Editicio "Jertco"
Ave 12 de Octubre '2205 y

Ave Orellana (Planta Baia)
Quito.
Tal 529004. TLX (393) 2805
Proteco Coeam Cia . Ltda
CtWeron 103 y Malecon
Casiila •0733
Guayaquil.
Tel 52e0«3

TLX. 03-821186

Peopte'a Reputillc o( e

TLX:

45787

TLX 8262395

TLX. (855) 35293

Ecuador

Ecuador

Cgvpt and Sudvi •
Electronic Engirteanrtg Liwton Office
P O Box 2891 Horreya
Heliopom.

Ceiro. Egypt

Tel 061508. TLX (927)92503

Fluke (Qreat Britain) LTD
Colonial Way
Walford.

Herti. W02 4TT
United Kirtgdom
Tel (0923)

40511.

TLX:

F,r^iand

TLX [phone]

450831.

TLX: (841) 8585576

(BS1) 834583

n«>ifu (0933)25007
EltiloplaB

Fluke (Holland) BV.
P O. Box 5053. 5004 EB Tilburg
Zevenneuvelenweg 53. 5040 AN TJburg
Tne Netherlands
Tel [phone]. TLX 52237

AWA

FIJI

47 Forster Road. Walu Bay
Suva.

FI|I

Tel:

312079. TLX FJ2347

Finland •

Oy Findip AB. Teollisuustie 7
02700 Kauniainan.

Puh (0) 50522S5 TLX (857) 123129
Fr«Ke •

MB Elecironique S A
Rue Fourny 000. Zl Centre
70530 BUC

BP No 31
70530 BUC. France

Tel:

(3)

9568131.

Amtest Associates Ltd.
Clarortce House. 31 Clarence Sl
Steines. Middlesex TwiO 4SV
Un.ied Kingdom
Tel [phone]. TLX 938855

Oerman Federel napwUMc •
Fluke (Deutschtand) GmbH
Max-Hueb«r StraBe a

8045 Itmaning West Germany

Tel [phone]. TLX 532473

Repilax: [phone]

Fluke (Ooutschland) GmbH
Ueineckesu esse 53

4000 Duaaeidon X. West Germany

Tei (0311)

Qraaci e

Hellenic Scientific Representations Ltd
II.

Vramde Street
Athens 613. Greece
Tel [phone] TLX: (883) 319330

Hong Kong e
Schmidt a Co (H K ) Ltd
26iTt Fl Wing on Centre

111 Connaught Roed

Central Hong Kortg
Tel [phone]

TLX: 74760

Hungarye
Amtest Associatea Lid
Clarence House. 31. ClarerKO St

Stames. MiddieMi Twi8 4SY
United Kingdom
Tel [phone]. TLX 938855

tcalMd*
Kriiijan O Skagfjord Lid

PO Box 908
Reyk^vik. Iceland
Tel 34130. TLX: 2133

Hindiirori SenrM:s8 Pvi Ltd
e^A L. Jegmohandes Marg
Bombay 400

OOO.

Te) 811318. TLX 113320
Hindrtron Services Pvi. Ltd

eth Mam Roed
33/44-A Raj Mshi Vikes Extension
Bangalore 500 000. India
Tei 33139. TLX. (9531 0045741

Hnditron Services Pvt Ltd
Shantiniketvi Qlfice No 0
eth Floor. 8 Camec Street
Calcutta 700 017. India
Tel 434033, 447541

himditron Services Pvi Ltd
304-300 Henhuni Totw
SO Nehri Piece
New Delhi. tl00i9. India
Tel 640380. TLX (95)314890

Hmditron SefMces Pvt Ltd
Snneth Complex. 5m Floof
1-1-58/1
Serojini Devi Roed
Secunderabed 500 003. India
Tel.

P.T.
Kebaywan Baru
Jakarta Selatan. Indonesia
Tel 710374. TLX: 45305

Iraq •
Fluke (Holland) B V.
PC Box 5053 5004 EB Tilburg
Zevenheuvelenweg 53. 5048 AN Tilburg
Ttte Neirtenaf¥tt
Tel [phone]. TLX 52237
Ireland •
Euro ElecironiCB
33 Brews Hill
Noven County Mesth. Ireland
Tel [phone]. TLX: (851) 3182

laraale
ROT Electrontca Er>gineering Ltd
PC.pox 75

40.
Ramat Hasharon 47235. Israel
Tel [phone]. TLX (932)32143

nalye
Sistrei S p A
Via Peiitia de voipedo 50
30092 Cintaelki Balsemo
Milen.
Tel [phone]. TLX. [phone]

Sistrel SpA
Via Giuseppe Armeliini No 39
00143 Rom*. Italy

Tel [phone]. TLX (043)66356

Sisird SpA
ViaCinto
Psrco 5 Paolo
80120 Naples. Italy
Tel [phone]

JapMia
Jonn Fluke Mtg Co. inc
Japan Branch
Surmiorno HIgashi
Snint>ashi Bklg
1-i-n HamematsuctK)
Mineto-ku Tokyo. Japan
Tel [phone]. TLX 3424331

India

to

i-l-SO'li

831117 TLX (953)0155 575

OMI

Tunggal Jaya Swii

Sokoiov Streei

liely

|C|

III^El

J*>*'"

«

Litho

P'""*®

in

U.S.A.

**'9- Co., Inc.

/ PO Box

C9090 / Everett,

WA

98206

/ (206) 356

5400

I

Kenye •

.' AOCOMLtd

PO Box 30070
N»robi.

Kenya. Eait Ahica

'- Tel 331055 TLX 23039

Nona •
Electro-Sciertca Korea Co
CPO BoxS440
Room 403. Boondo Bldg
50-12 Jangchung-IKa

Jung-ku

Seoul.

Korea

Tal 201-7702. TLX K25381
Kuwaaa

Al-Batiar mi Group
PO Box 20672 Safat

- Kuwait. Arabian Gulf
Tel [phone] TLX 44822

. Uabek jEleclronic [>ivitK>n)

P.O Box 11-3823
Berul.

Lebanon
Te) S12523. TLX' (033) 22BM
USra*

Fluke (Holland) BV.
PO.

Box 9053 5004 EB Tuburg
Zevenheuvetenweg 53. 5048 AN Tuburg
The rtettwlands
Tei [phone] TLX 53237

Uecomti UaiasiB SON
Lot 2 Lorof>g 13«A
Petaiing Jaya. Maiasia
Tal 573455. TLX MA37005

Healce •
Electronica y.Tecnologia
AvaniadsSA de C V
Pafnucio Padila 53
Ctfcuiro Comercioi Sateiite
Naucaipann Edo De Mexico
Tel [phone]
TLX [phone]

Mapai*
AsiOCialed Enierprises
QPO Box 700. Pyaphai Tola
Kattwnandu t4eoai
Tel 13888

' Fluke (Neoeriend) B v.

Qaiirtuiirir^ 14
5041 DS Titburg

. The Nethertandi

PO Box lis
5000 AC Tilburg
The Natnenanas
Tal [phone] TLX 52083
HewZeaianda
McLean Informairan Tecrwiology. Lid
PO Box 9404. Newmarkai
Aijcklar>d
Tel

501-801.
HcLaan Intormation TachrHitogy. Ltd
PO Box 400
WellinglDn. New Zealand
Tel 851-450 or 844-424
Meertae
Hofal Engineering Co Lid

' P.O Box 63(9

Tel 000744 TLX 21353

Hormrnym

Morgannieme S Co A/S
Kongheliegara 3
PO.

Box 0688. Hoddokka
Oslo 5. Norway
Tol (2) 358110. TLX (856)71719

Sultanata of Oman
Tal 703000 or 703802
TLX 3108

BHD

1.

New Zealand

TLX (791) NZ 315 70

Pak InlernatKmaJ Operations
505 Ui^ummadi Houae
11 Chundngar Road
P O. Box 5333 Karachi. Pakistan
Tel 3311!7. TLX (052) 24494

POn VeMen •
Fluke (Holland) B V.
P O Box 5053. 5004 EB T.«urg
Zevenneuvsienweg 53 5048 AN Tiibt
The NatrMrlands
Tol (0131873973. TLX' 52237

Peru •

ImportoCiones V Repretentacwnas

Electronicaj S A
AvOB Franklm D Roosevelt 105
Lima 1. Peru

Tal 288050. TLX' (394) 25883

WilSp»lwii e

Spark Radio 0 Eiectromci. Corp
1D44 0ngpin Sl . Sla C'lu
Manila niihppinet
Tol 47-11-94. TLX 27901

Spark Raoio S Elacironics Corp
Gieanhirli PO Boi 610

San Juan. Metro-Manila
Ptiihpoinos ZrD 3113
Tei 1

•51-02

Amtest Aisociaies Lid
Clarence House.
Staines. Middlesex Twis 4Sv

Tei (784)03555 TLX 928055

Ponuffoi •
Decade-Equipamenioi oe
Electronica. Lda
Rue Pedro Nunes. 47-C

PO Box I12B. 1003
Tal (10) b74004 TLX (833) 10400

Oatwa
Technology Organisation
PO Boa 5540 DoHa Oaiar

Amtest Associates Ltd
Cisronce House. 31 Clarence St
Staines Middlesex TW18 4SY
United Kir\gdom
Tel [phone]. TLX 928855

Saudi AraWea
Electronic Equipment Marketing Co

PO Box 3750

Riyadh.
Tal It) 477.105001
TLX |93S) 201130

Rank OConnof s (PTE) t
08 Paiir Panjang Road
Singapore 0511
Republic ot Sirtgapore
Tel 637944
TLX HS21023

Fluke (HoilsnO) B V
PO Box 5053. 5004 EB.Tilburg
Zevenheuvelanweg 53 5048 AN Tuburg
Tne Natharlands
Tei [phone]. TLX 52237

Sotitti Africa a
Fluke S A (Pty) Ltl
PO 90x30707 Bramiey30iB
Republic ol South Alrica
Tol [phone] TLX 4J4328

Spelne

Hispano Eiectror>KS S A
Poltgono Induitrial Uriinsa
Aparlodo da Corraoi 48
Atcorcon (Madrid). Spain
Tel (1) Oi04ioa
TLX (631)32404

31.

Clarence Sl

lOOO Liiboa Ponugai

tel 321431 TLX (99714581

L'Sboa

Seudi Arabta

Codex

Jay-Ea Etaaionics
180 Poonfarama Mawatha
Colombo 5. Sn Lanka
T«t 073-3303
SeMdena
Telemstortient AB

P O. Box 4400

103 04 Valtingtfy. Sweden
Tel (8) 3803T0. TLX' (854) 15770

Traco Electronic AG

Jenaischstrassa i
8002 Zuricr^. Switieriend
Tel (1)

2010711.

ftyrtaa
Mabek (Eleciron.c Division)

PO Box 4238

Damascus Syna
Tatwan a

Scnmnn Scioniific Fai East Ltd

006.

06.
Taipei.
Tel [phone]. TLX Mill

Measuretromr Lid
1890/10 Ramkemheeng Rd
Huamark Bangkok 24 Ttiailano
Ta« 3143309. TLX 81143
TiMwsle •
Seiep S A R L
0 Ruade Spsne
TjniS - 1000 RP TuneSiS
Te< (1) 24S093 TLX (034) 13030

Turkey •
Erkman Elektionik Alallei
Ticarot Anonim Sirkoli
Necanoey Cao 02'3
Karakoy istanoui Turkey
Tel 441548
TLX (031)33353
UnHed Areb Emirates a
Al Sanani Trad E*l
PO Box 7107
Abu Dhabi. United Arab Em<iatei
Tel 821370 Of B2'.371

TLX 23966

Fluke (Grsal Sntaini Lid
Colonial Way
Watford.
United Kingdom
Tel (0923)
Rapiisx (0033) 25067

Coasin Uruguaya S A
CaiiHa de Correos 1400
Libertad2529
MonioviOeo. Uruguay
Tel 78-90-15. TLX UYa571
U.S.S.R. a
Amtest Aisociaiei Ltd
Clarence House. 3i. Clarence Si
Staines MKKMsex TW18 45Y
United Kingdom
Tol (784) 63555. TLX 928855
Venauete •
Coasm.
Callo 0 Con Calle 4. Edit Edinurt»
Aparisdo Oe Correoa
NR-7D 130LoiRuices
Caracas 1070A. Veneiueu
Tel [phone] TLX (395)21027
Yemon m
Fluke (Holland) B V
P 0 Box S0&3 5004 EB Tilburg
Zevenrieuv*Mn«ao 53. 5048 AN Tub
The Nemeriandi
Tel [phone]. TLX 52237

Amiesi Aisociaios Ltd
Ciaience House
Siaines. Middlesex TWiO 4SV

Tei (704)03555 TLX 920055

TLX (845)54318

Chia Hsin Bldg

Chung Snsn N Rd . Sec 3

Taiwan

Marts WD2 4TT

40511.

TLX 034503

C A

31.

darenco St

H Supplied end Suppf>rt«d by —

Fluke (Hollend) BV
P O. Box 5053. 5004 EB Tirburg
Zevenheuvelanweg 53 5040 AN Tiittufg
The r4eihefiends
Tel [phone]. TLX' 52237

• Supplied and Supported by -~

Fluke tntemetional Corporation
PO Box COOOO
Everett WA 98208 USA

Tel [phone]

TLX 152082 JOHN FLUKE EVT

IFLUKEI