Fluke 8062A Service manual

®

This manual pertains to instruments with serial number 6830XXX or higher.

8062A

True-rms Multimeter

Instruction Manual

PN 609153

May 1997 Rev.1, 1/00

© 1997, 2000 Fluke Corporation, All rights reserved. Printed in U.S.A. All product names are trademarks of their respective companies.

LIMITED WARRANTY & LIMITATION OF LIABILITY

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

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

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

To obtain warranty service, contact your nearest Fluke authorized service center or send the product, with a description of the difficulty, postage and insurance prepaid (FOB Destination), to the nearest Fluke authorized service center. Fluke assumes no risk for damage in transit. Following warranty repair, the product will be returned to Buyer, transportation prepaid (FOB Destination). If Fluke determines that the failure was caused by misuse, alteration, accident or abnormal condition of operation or handling, Fluke will provide an estimate of repair costs and obtain authorization before commencing the work. Following repair, the product will be returned to the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges (FOB Shipping Point).

THIS WARRANTY IS BUYER’S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA, WHETHER ARISING FROM BREACH OF WARRANTY OR BASED ON CONTRACT, TORT, RELIANCE OR ANY OTHER THEORY.

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

Fluke Corporation	Fluke Europe B.V.
P.O. Box 9090	P.O. Box 1186
Everett, WA 98206-9090	5602 BD Eindhoven
U.S.A.	The Netherlands

5/94

Safety Information

This meter has been designed and tested in accordance with IEC Publication 348. To ensure that the meter is used safely, follow all safety and operating instructions in this manual. If the meter is not used as described in this manual, the safety features of the meter might be impaired.

∙Do not use the meter if the meter or test leads look damaged, or if you suspect that the meter is not operating properly.

∙Turn off power to the circuit under test before cutting, unsoldering, or breaking the circuit. Small amounts of current can be dangerous.

∙Do not apply more than 500V rms between a terminal and earth ground.

∙Use caution when working above 60V dc or 30V ac rms. Such voltages pose a shock hazard.

∙When using the probes, keep your fingers behind the finger guards on the probes.

∙Disconnect the live test lead before disconnecting the common test lead.

Symbols

The following international symbols are used in this manual:

Important Safety Information in Manual

AC

DC

Diode Test

Ground

Fuse

Indicates Terminals At Which Dangerous Voltages May Exist

Battery

Table of Contents

Chapter			Title	Page
1	Introduction and Specifications............................................			1-1
	1-1.	Introduction .............................................................................		1-3
	1-2.	Specifications...........................................................................		1-4
2	Operation Instructions...........................................................			2-1
	2-1.	Introduction .............................................................................		2-3
	2-2.	Unpacking Your Instrument.....................................................		2-3
	2-3.	Battery Installation or Replacement .........................................		2-3
	2-4.	Fuse Replacement ....................................................................		2-5
	2-5.	Physical Features .....................................................................		2-6
	2-6.	Front Panel...........................................................................		2-6
	2-7.	Display.................................................................................		2-8
	2-8.	Signal Input Limits ..................................................................		2-9
	2-9.	Operation .................................................................................		2-10
	2-10.	Power-On Self-Test..............................................................		2-10
	2-11.	AC/DC Voltage (V) .............................................................		2-11
	2-12.	True RMS Measurement ..................................................		2-11
	2-13.	AC-Coupled AC Measurements.......................................		2-12
	2-14.	Waveform Comparison and Conversion ..........................		2-13
	2-15.	High Impedance DC Voltage ...........................................		2-14
	2-16.	AC/DC Current (A)..............................................................		2-15
	2-17. Resistance (Ω)......................................................................			2-18
	2-18.	Autoranging Megohms.....................................................		2-19
	2-19.	Autoranging Kilohms.......................................................		2-20
	2-20.	Diode Test (G)...................................................................		2-21
	2-21.	Relative (REL) .....................................................................		2-22
	2-22.	Continuity (	) ...........................................................	2-25
	2-23.	Initial Check-Out Procedure ....................................................		2-25
3	Theory of Operation ...............................................................			3-1
	3-1.	Introduction .............................................................................		3-3
	3-2.	Functional Description.............................................................		3-3
	3-3.	Microcomputer.....................................................................		3-3
	3-4.	Measurement Acquisition Chip (MAC) ...............................		3-5
	3-5.	A/D Converter Cycle............................................................		3-5
	3-6.	Voltage Measurement ..........................................................		3-8

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8062A

Instruction Manual

	3-7.	Current Measurement ..........................................................	3-9
	3-8.	Resistance Measurement......................................................	3-10
	3-9.	Continuity Measurement .....................................................	3-11
4	Maintenance............................................................................		4-1
	4-1.	Introduction .............................................................................	4-3
	4-2.	Service Information .................................................................	4-3
	4-3.	General Information ................................................................	4-5
	4-4.	Handling Precautions for Using Static Sensitive Devices ...	4-5
	4-5.	Disassembly and Reassembly ..............................................	4-5
	4-6.	Calibration and Backup Fuse Access...............................	4-6
	4-7.	Main PCB Access ............................................................	4-7
	4-8.	LCD and Microcomputer PCB Disassembly and
		Assembly .........................................................................	4-8
	4-9.	Backup Fuse Replacement...................................................	4-11
	4-10.	Cleaning...............................................................................	4-11
	4-11.	Performance Tests ...................................................................	4-12
	4-12.	Initial Procedure ..................................................................	4-12
	4-13.	Microcomputer and Display Test.........................................	4-12
	4-14.	Voltage Test.........................................................................	4-13
	4-15.	Resistance Test ....................................................................	4-14
	4-16.	Continuity Test ....................................................................	4-15
	4-17.	Current Test .........................................................................	4-15
	4-18.	Diode Test ...........................................................................	4-17
	4-19.	Calibration Adjustments ..........................................................	4-17
	4-20.	Troubleshooting.......................................................................	4-19
	4-21.	Self-Tests .............................................................................	4-19
	4-22.	Ratio Self-Test .................................................................	4-19
	4-23.	Switch Decoding Self-Test ..............................................	4-20
	4-24.	Troubleshooting Guide ........................................................	4-21
5	List of Replaceable Parts.......................................................		5-1
	5-1.	Introduction .............................................................................	5-3
	5-2.	How to Obtain Parts ................................................................	5-3
	5-3.	Manual Status Information ......................................................	5-4
	5-4.	Newer Instruments...................................................................	5-4
	5-5.	Service Centers ........................................................................	5-4
6	Accessory Information ..........................................................		6-1
	6-1.	Introduction .............................................................................	6-3
	6-2.	Deluxe Carrying Case (C90)....................................................	6-3
	6-3.	Temperature Probes (80T-150C and 80T-150F) .....................	6-3
	6-4.	Current Transformer (80I-600)................................................	6-6
	6-5.	High Voltage Probe (80K-6) ...................................................	6-6
	6-6.	High Voltage Probe (80K-40) .................................................	6-7
	6-7.	High Frequency Probe (83RF) ................................................	6-7
	6-8.	High Frequency Probe (85RF) ................................................	6-8
	6-9.	Current Shunt (80J-10)............................................................	6-9
	6-10.	AC/DC Current Probe (Y8100)...............................................	6-9

ii

			Contents (continued)
	6-11.	AC Current Transformer (Y8101)............................................	6-10
	6-12. Safety Designed Test Lead Set (TL70) ....................................		6-11
	6-13.	Deluxe Test Lead Set (Y8134).................................................	6-11
	6-14.	Slim Flex Test Lead Set (Y8140).............................................	6-12
	6-15.	Cables and Adapters ................................................................	6-12
7	Schematic Diagrams ..............................................................		7-1

iii

8062A

Instruction Manual

iv

List of Tables

Table	Title	Page
1-1.	8062A Accessories...................................................................	1-4
1-2.	8062A Specifications ...............................................................	1-5
2-1. Controls, Indicators and Connectors........................................		2-7
2-2.	Input Overload Limits..............................................................	2-9
2-3. Resistance Function Autoranges and Resolution .....................		2-19
3-1.	Voltage Input Divider ..............................................................	3-9
4-1.	Required Test Equipment ........................................................	4-4
4-2.	Voltage Test.............................................................................	4-13
4-3.	Resistance Test.........................................................................	4-15
4-4.	Current Test .............................................................................	4-16
4-5.	Switch Decoding Self-Test ......................................................	4-21
4-6.	Troubleshooting Guide ............................................................	4-22
4-7. Troubleshooting the Resistance Function: Voltage Sources
	for Ranges ................................................................................	4-26
4-8. U3 (MAC) Pin Descriptions ....................................................		4-26
5-1.	8062A Final Assembly.............................................................	5-5
5-2. A1 Main PCB Assembly..........................................................		5-9
5-3. A3 RMS PCB Assembly..........................................................		5-13
6-1.	Cables and BNC, Banana, Phone and Phono Plug Adapters ...	6-12

v

8062A

Instruction Manual

vi

List of Figures

Figure		Title	Page
2-1.	Removal of Battery Compartment Cover .................................		2-4
2-2.	Battery Removal and Fuses......................................................		2-4
2-3.	Controls, Indicators and Connectors........................................		2-6
2-4.	8062A Display	.........................................................................	2-8
2-5.	Overrange Indicator .................................................................		2-9
2-6.	Voltage Operation....................................................................		2-11
2-7.	AC and DC Waveform ........................................Components		2-12
2-8.	Multiplication Factors ..................for Converting Waveforms		2-13
2-9.	High Impedance ...................................................DC Voltage		2-14
2-10.	Current Operation ....................................................................		2-16
2-11.	Calculating Burden ...........................................Voltage Error		2-18
2-12.	Resistance Operation ...............................................................		2-18
2-13.	Selection of Autoranging ...........................................Kilohms		2-21
2-14.	Diode Test................................................................................		2-21
2-15.	Relative (REL) ........................................................Operation		2-22
2-16.	Continuity ( ..................................................	) Operation	2-26
3-1.	8062A Block Diagram .............................................................		3-4
3-2.	Analog Portion ......................................of the A/D Converter		3-7
3-3.	A/D Measurement ..........................................................Cycle		3-7
3-4.	Voltage Measurement ..............................................................		3-8
3-5.	Current Measurement...............................................................		3-10
3-6.	Resistance/Continuity ........................................Measurement		3-11
4-1.	Calibration and ...............................Backup Fuse (F2) Access		4-7
4-2.	Assembling/Disassembling the Microcoputer PCB and LCD.. 4-9
4-3.	Disassembling ...........................................................the LCD		4-10
4-4.	General Equipment ...............................................Connection		4-14
4-5.	Equipment Connection ..................................for Current Test		4-16
5-1.	8062A Final Assembly.............................................................		5-7
5-2.	A1 Main PCB Assembly..........................................................		5-12
5-3.	A3 RMS PCB Assembly..........................................................		5-14
6-1.	Accessories ..............................................................................		6-4
7-1.	A1 Main PCB Component ....................Locations (TopView)		7-3
7-1.	A1 Main PCB Component .............Locations (Bottom View)		7-3
7-2.	Test Point Locations ................................................................		7-4
7-3.	A/D Measurement ..........................................................Cycle		7-5
7-4.	Switch Detail............................................................................		7-6

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8062A

Instruction Manual

7-5.	A1 Main PCB Schematic Diagram ..........................................	7-7
7-6.	A3 RMS PCB Schematic Diagram ..........................................	7-8

viii

Chapter 1

Introduction and Specifications

	Contents	Page
1-1.	Introduction ......................................................................	1-3
1-2.	Specifications ...................................................................	1-4

1-1

8062A

Instruction Manual

1-2

Introduction and Specifications 1

Introduction

1-1. Introduction

Your Fluke Model 8062A is a handheld, microcomputer-based 4-1/2 digit multimeter that is ideally suited for use in the field, laboratory, shop or home. The 8062A has all the features that have become accepted standards for quality handheld multimeters, as well as some new features that have not been offered before in a handheld multimeter. New features include the following:

∙True rms measurements for ac signals up to 30 kHz.

∙Resistance measurements up to 300 MΩ.

∙Ability to store any input signal as an offset or relative reference value. Other features include:

∙FUNCTIONS:

Standard DMM measurement functions, such as ac and dc volts and ac and dc current, as well as resistance, continuity, and diode test.

∙RANGES:

Leading zero suppression. Automatic polarity. Overrange indication.

Protection from overloads and transients up to 1500V peak.

Dual-slope integration a/d conversion to ensure noise-free measurements.

Autoranging MΩ resistance range (to 300 MΩ), as well as four fixed resistance ranges from 200Ω to 200 kΩ.

∙OPERATOR CONVENIENCE: 4-1/2 digit Liquid Crystal Display.

Software-control self-test routines for quick verification of internal circuitry and operation.

∙POWER:

170 hours of continuous operation can be expected from a 9V alkaline battery (NEDA 1604).

1-3

8062A

Instruction Manual

Low battery voltage is automatically detected and displayed. The low battery indication, BT, appears on the display when about 20% of the battery life remains.

A full line of accessories is available to enhance the capabilities of the 8062A. The accessories are listed in Table 1-1 and described in Chapter 6.

Table 1-1. 8062A Accessories

Model No.*

A81

C-90 80T-150C 80T-150F 80I-600 80K-6 80K-40 80J-10 83RF 85RF

Description

Battery Eliminator Vinyle Carrying Case Temperature Probe °C Temperature Probe °F

Current Transformer 2’ jaws High Voltage Probe (6 kV) High Voltage Probe (40 kV) Current Shunt

High Frequency Probe (100 MHz) High Frequency Probe (500 MHz)

*BNC, banana plug, phone and phono adapters are also abaialbe as accessories and are listed in Section 6.

1-2. Specifications

The specifications for the 8062A are listed in Table 1-2.

1-4

Introduction and Specifications 1

Specifications

Table 1-2. 8062A Specifications

Electrical

The following specifications are based on a one-year calibration cycle, an operating temperature of 18 to 28°C (64 to 82°F) and a relative humidity not exceeding 90%.

DC Voltage

Range		Resolution		Accuracy
				±(% of reading + no. of digits)
200 mV		.01 mV		0.05% + 2
2V		.1 mV
20V		1 mV
200V		10 mV		0.07% + 2
1000V		100 mV
Response Time..............................			1 second maximum, to rated
			accuracy within selected range.
Input Impedance ............................			10 MΩ shunted by >100 pf
Normal Mode Noise Rejection .......			>60 dB at 50 Hz or 60 Hz
Common Mode Noise Rejection ....			>120 dB at dc, >90 dB at 50 Hz and
			60 Hz (1 kΩ imbalance)
Overload Protection		.......................	1000V dc or peak ac continuous,
			except 20 seconds maximum on 200
			mV and 2V ranges above 300V dc or
			rms.

DC Voltage, High Impedance Mode

All specifications are the same as for the dc voltage mode except the following (only 200 mV and 2V ranges are available):

Range		Resolutions		Accuracy
				±(% of reading + no. of digits)
200 mV		.01 mV		0.06% + 2
2V		.1 mV
Input Impedance ............................			>1000 MΩ, typically 10,000 MΩ
Overload Protection		.......................	300V dc or rms continuous, 20
			seconds maximum 300V to 1000V dc
			or peak ac.

1-5

8062A

Instruction Manual

Table 1-2. 8062A Specifications (cont)

AC Voltage (True RMS, AC-Coupled)

Ranges ..............................................

200 mV, 2V, 20V, 200V, 750V

Accuracy *..........................................

±(% of reading + no. of digits). See table

below:

Input

Resolution

Range

20 Hz -

45 Hz -

500 Hz -

10 kHz -

Voltage

45 Hz

500 Hz

10 kHz

30 kHz

20.0 -

.01 mV

200 mV

0.5%

1%

199.99 mV

+ 20

+ 40

.2000 -

.1 mV

2V

1% +10

1.9999V

2.000 -

1 mV

20V

0.5% +12

5% +20

5% +40

19.999V

20.00 -

10 mV

200V

199.99V

75.0 -

100 mV

750V

Not

1%

Not Specified

499.9V

Specified

+10

500.0 -

2%

750.0V

+10

* Not specified for input < 10% of range.

1 kHz

Input Impedance .........................

10 MΩ shunted by <100 pF

Common Mode Noise

>60 dB at 50 Hz and 60 Hz (1 kΩ

Rejection

.....................................

imbalance)

Crest Factor Range.....................

1:1 to 3:1

Response Time...........................

Five seconds maximum to rated

accuracy within selected range, 12

seconds to rated accuracy from an

overload.

Overload Protection ....................

750V rms or 1000V peak continuous

except 20 seconds maximum on the

200 mV range above 300V rms or

300V dc. Input not to exceed a volthertz product of 1x107 (for example, 200V at 50 kHz).

1-6

Introduction and Specifications

Specifications 1

Table 1-2. 8062A Specifications (cont)

Resistance

Ranges

200Ω, 2 kΩ, 20 kΩ, 200 kΩ, autoranging

MΩ. The MΩ range extends from .0001

mΩ to 300 MΩ in three autoranged

ranges. Upscale range changes are

made at 2 MΩ and 20 MΩ. Downscale

range changes are made at 19 MΩ and

1.9 MΩ.

Accuracy

±(% of reading + no. of digits). See table

below.

Range

Reso-

Accuracy

Full-

Max

Open

scale

Circuit

lution

Current

Voltage

Voltage

200Ω

0.01Ω

(0.1%+2+.02Ω)

<1.1 mA

<4.8V

2 kΩ

0.1Ω

(0.1%+2)

<250 mV

<150 μA

20 kΩ

1Ω

(0.1%+2)

<15 μA

<1.5V

200 kΩ

10Ω

(0.1%+2)

<1.5 μA

0-1.9999 MΩ

100Ω

(0.2%+2)

MΩ

2-19.99 MΩ

10 kΩ

(0.25%+3)

<2.5 μA

20-99.9 MΩ

100 kΩ

(1%+3)

<2.5V

<2.5V

100-300 MΩ

1 MΩ

(2%+3)

Autoranging kΩ

0.1Ω

(.20%+5)

<1.0 mA

to 1 kΩ

..............................Response Time

Two seconds maximum to rated

accuracy for all ranges except MΩ.

For MΩ, 8 seconds maximum.

Overload Protection

300V dc or rms ac for all ranges

1-7

8062A

Instruction Manual

	Table 1-2. 8062A Specifications (cont)
	Continuity
	Ranges	All resistance ranges
	Threshold .......................................	Nominally <50% of range (for
		example, 100Ω in the 200Ω range)
		for 200Ω, 2 kΩ, 20 kΩ, 200 kΩ
		ranges. Nominally <100 kΩ in
		autoranging kΩ.
	Display Indication...........................	Horizontal bar across the top of the
		display and/or 2.667 kHz tone.
		Indication is present for a minimum of
		200 ms.
	Response Time..............................	50 μs maximum (10 μs typical)
	Overload Protection .......................	300V dc or rms ac
	Diode Test
	Range ............................................	2V
	Test Current ...................................	1 mA (typical)
	Accuracy ........................................	±(0.06% of reading + 2 digits)
		(Specification applies for voltage
		measurement)

	Response Time..............................			1 seconds maximum
	Overload Protection .......................			300V dc or rms ac
DC Current
	Range	Resolution		Accuracy
			±(% of reading + no. of digits)
	200 μA	.01 μA
	2 mA	.1 μA	0.3% + 2
	20 mA	1 μA
	200 mA	10 μA	0.7% + 2
	2000 mA	100 μA

Burden

Voltage

.3V typical

.3V typical

.3V typical

.3V typical

.9V typical

Overload Protection .......................	2A/250V fuse (operator replaceable)
	in series with 3A/600V fuse (service
	personnel replaceable).

1-8

Introduction and Specifications 1

Specifications

Table 1-2. 8062A Specifications (cont)

AC Current (True RMS Responding, AC-Coupled

Accuracy *...................................... ±(% of reading + no. of digits). See table below.

Input	Resolution			Range		20 Hz -	45 Hz -	3 kHz -	10 kHz -
Current						45 Hz	3 kHz	10 kHz	30 kHz
20.00 to	0.01		μA	200 μA
199.99 μA
.2000 to	0.1		μA	2 mA					2% + 40
1.9999 mA
2.000 to	1	μA		20 mA	1% + 10		0.75% + 10	2% + 20
19.999 mA
20.00 to	10	μA		200 mA
199.99 mA					1.5% + 10		1% +10
200.0200 to	100		μA	2000 mA				Not Specified
1999.9 mA

* Not specified for input < 10% of scale.

	..............................Burden Voltage	0.3V rms typical except 2000 mA
		range, 0.9V rms typical
	Overload Protection	2A/250V fuse (operator replaceable)
		in series with 3A/600V fuse (service
		personnel replaceable).
Relative
	........................................Selection	When the REL button is pushed, the
		input applied at that time is stored as
		a zero reference point. Subsequent
		readings indicate deviations (±) from
		the reference point.
	Accuracy	Error does not exceed the sum of the
		errors of the reference reading and
		the subsequent reading.

1-9

8062A

Instruction Manual

Table 1-2. 8062A Specifications (cont)

General
Maximum Common Mode
Voltage ...............................	500V dc or ac rms
Display Update Rate .........	2.5 readings/second
Display ...............................	4½ digit duplex LCD (19,999 count), leading
	zero suppression, autopolarity.
Electromagnetic	In an RF field of 1 V/m on all ranges and
Compatibility .....................	functions: Total Accuracy = Specified
	Accuracy + 2.3% of range. Performance
	above 1 V/m is not specified.
Display Annunciators .......	BT (low battery indicator), REL: (relative
	function enabled).	AND R (continuity
	function enabled), and — (bar indicates
	continuity detected)."""
A/D Converter....................	Dual-slope converter
Power .................................	Single standard 9V battery (NEDA 1604), or
	Fluke A-81 Battery Eliminator option
	available for 100, 115, or 230V ac operation.
Battery Life ........................	Typically 170 hours with an alkaline battery.
	BT appears on display when approximately
	20% of battery life remains.
Size.....................................	180 mm L x 86 mm W x 45 mm H (7.1” L x
	3.4” W x 1.8” H)
Weight ................................	.41 kg (14.5 oz.)
Shock and Vibration .........	MIL-T-28800B
Environmental
Operating Temperature ....	0 to 50°C
Storage Temperature........	-35 to + 60°C
Accuracy Temperature	0.1 x the applicable accuracy specification
Coefficient .........................	per °C (plus the initial 23°C specification) for
	0 to 18°C and 28 to 50°C.
Relative Humidity..............	0 to 80% R.H. from 0 + 35°C, 0 to 70%
	from + 35°C to + 50°C except 0 to 70% R.H.
	for MΩ range above 20 MΩ.
Safety
Safety Standards...............	Designed to Protection Class II
	requirements of IEC 348, UL1244 ANSI
	C39.5, and CSA Bulletin 556B.

Certifications..........................

1-10

Chapter 2

Operation Instructions

	Contents		Page
2-1.	Introduction ....................................................................		2-3
2-2.	Unpacking Your Instrument ...........................................		2-3
2-3.	Battery Installation or Replacement ...............................		2-3
2-4.	Fuse Replacement...........................................................		2-5
2-5.	Physical Features ............................................................		2-6
2-6.	Front Panel..................................................................		2-6
2-7.	Display........................................................................		2-8
2-8.	Signal Input Limits .........................................................		2-9
2-9.	Operation........................................................................		2-10
2-10.	Power-On Self-Test	....................................................	2-10
2-11.	AC/DC Voltage (V)	....................................................	2-11
2-12.	True RMS Measurement .........................................		2-11
2-13.	AC-Coupled AC Measurements ..............................		2-12
2-14.	Waveform Comparison and Conversion..................		2-13
2-15.	High Impedance DC Voltage ..................................		2-14
2-16.	AC/DC Current (A).....................................................		2-15
2-17.	Resistance (Ω).............................................................		2-18
2-18.	Autoranging Megohms ............................................		2-19
2-19.	Autoranging Kilohms ..............................................		2-20
2-20.	Diode Test (G)..........................................................		2-21
2-21.	Relative (REL) ............................................................		2-22
2-22.	Continuity (	) ..................................................	2-25
2-23.	Initial Check-Out Procedure ...........................................		2-25

2-1

8062A

Instruction Manual

2-2

Operation Instructions 2

Introduction

2-1. Introduction

This chapter describes how to make measurements with your 8062A. Even though you may have used a multimeter before, we suggest that you take the time to read this material carefully so that you can take full advantage of the wide variety of measurement functions offered by the 8062A.

2-2. Unpacking Your Instrument

Your instrument was shipped with two test leads (one red and one black), a 9V battery, and this manual. Check the shipment carefully and immediately contact the place of purchase if anything is missing or damaged in shipment.

If reshipment is necessary, please use the original shipping container. If the original container is not available, be sure that adequate protection is provided to prevent damage during shipment. It is recommended that the instrument be surrounded by at least three inches of shock-absorbing material in the shipping container.

2-3. Battery Installation or Replacement

The 8062A is designed to operate on a single, common, inexpensive 9V battery (NEDA 1604). You can expect a typical operating life of up to 170 hours with an alkaline battery, or 80 hours with a carbon-zinc battery. When the battery has exhausted about 80% of its useful life the BT indicator will appear at the far left of the display. Your instrument will continue to operate properly for at least 24 hours with an alkaline battery after BT first appears on the display. The 8062A also may be operated from a standard ac power line outlet when used with the optional A81 Battery Eliminator (refer to Chapter 7 for a description). Use the following procedure to install or replace the battery:

Warning

To avoid electrical shock, turn off the instrument and remove the test leads and any input signals before replacing the battery.

1.Set the 8062A power switch to OFF.

2.Remove test leads from external connections and from the 8062A input terminals.

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8062A

Instruction Manual

3.Turn the instrument over and remove screw from battery cover as shown in Figure 2-1.

4.Use your thumbs to push off the battery cover as shown in Figure 2-1.

5.Slide the battery out of the compartment as shown in Figure 2-2.

6.Carefully pull the battery clip free from the battery terminals (if replacing the battery) and attach the new battery.

7.Slide the battery and its leads into the compartment and slide the cover into place.

Use thumbs to push battery cover down and then out from instrument case.

CLOSE		WARNINGSHOCK
TO	AVOID
INPUTS		BEFORE		REMOVE
	COVER
			BEFOREOPENING
				USE

CLOSE		WARNINGSHOCK
TO	AVOID
INPUTS		BEFORE		REMOVE
	COVER
			BEFOREOPENING
				USE

Backside of

8060A

dy03f.eps

Figure 2-1. Removal of Battery Compartment Cover

Fuse in Circuit

Spare Fuse

dy04f.eps

Figure 2-2. Battery Removal and Fuses

2-4

Operation Instructions 2

Fuse Replacement

You can measure the voltage of your battery by using the following procedure:

1.Select the dc voltage function and the 20V range.

2.Locate the opening for the battery eliminator jack on the right side of the instrument to the right of the display. Touch the red (VΩS) probe tip to

the side contact (not the center pin). Be sure you do not short the battery by shorting the side contact to the center pin. Battery voltage should be between 5.2V to 10V for proper operation. If the voltage is less, the battery should be replaced.

2-4. Fuse Replacement

There are two fuses located at the right side of the battery compartment (refer to Figure 2-2 or examine your instrument). The fuse at the far right is F1. Fuse F1, 2A/250V, protects the current input from an input overload. The other fuse is a spare fuse for F1. When you purchase your instrument, F1 should be installed and the spare fuse should be in one of the two slots next to it. The larger slot is for the American-style fuse, and the smaller slot is for the European-style fuse (either style fuse fits in the installation compartment).

If you need to replace F1, use the tip of a test lead to push the fuse forward from the end and then up to release. Replace F1 with the appropriate 2A/250V fuse; American-style: fast-acting, type AGX2, 1/4 x 1”, Fluke PN 376582; European-style: 5 x20 mm, Fluke PN 460972. Do not use makeshift fuses or short-circuit the fuseholder.

There is another fuse, F2, 3A/600V, which also protects the current input. The instrument cover must be removed to replace F2. This procedure is described in Chapter 4 and should only be done by a person qualified to service the instrument.

The following steps provide a quick and easy way to check the condition of both fuses F1 and F2:

1.Select the resistance function and the 2 kΩ range.

2.Touch the red test lead tip to the A input jack so that the VΩS input and the A input are shorted together.

3.If the display reads .1000 ± .0100 kΩ, both fuses are good.

4.If the display read OL, one or both fuses need replacement.

2-5

8062A

Instruction Manual

2-5. Physical Features

Before you begin using your 8062A, we suggest you take a few minutes to familiarize yourself with the instrument. All of the externally accessible features are shown in Figure 2-3 and described in Table 2-1. The front panel and the display are also described in the following paragraphs.

2-6. Front Panel

The front panel of the 8062A is designed to make function and range selection easy. The symbols and colors on the panel indicate which switches to push or buttons to press to select the function you want. Details are provided later with the description of each function.

12
11		REL
1000	DC	M
	AC
750
2000mA		200k
	200
200mA		20k
	20
20mA
10		2k
		2

9

8

7

2mA	200
200mV
µA
200
DC
AC				S
	V
A
					S
				V
	COMMON
	A
				!
				DC
				1000V AC
	!	500V	MAX	750V
				MAX
	2AMAX

4

6 5

1

2

3

dy05f.eps

Figure 2-3. Controls, Indicators and Connectors

2-6

				Operation Instructions	2
				Physical Features
			Table 2-1. Controls, Indicators and Connectors
		Item	Name	Function
		No.
		1W*	Battery Eliminator	External input power connector for use with
			Connector	the A81 Battery Eliminator accessory.
	2		Function Buttons:	Push buttons that toggle on or toggle off the
			, REL	‘secondary functions: visible or audible
				continuity, or relative. These functions are
				selected in conjunction with the primary
				measurement functions (see items 7 and 8).
	3		Battery	Cover for the 9V battery and the current fuse
			Compartment and	F1.
			Cover
	4		V Ω S Input	Protected test lead connector used as the
			Connector	high input for all voltage, resistance, and
				continuity measurements. All test lead
				connectors accept standard or safety-
				designed banana plugs.
	5		COMMON Input	Protected test lead connector used as the
			Connector	low or common input for all measurements.
	6		A Input Connector	Protected test lead connector used as the
				high input for current measurements.
	7		Function	Interlocked switches that are used in
			Switches: A,V, Ω,	conduction with the input connectors to
				select the measurement functions. Pushing
				one switch releases the other, or both may
				be pushed together.
	8		AC/DC Function	Push-on/push-off switch is used to select ac
			Switch	or dc for current or voltage measurements.
				(Does not affect selection of diode test or
				resistance functions).
	9		Range Switches	Interlocked switches that are used to select
				ranges. Pushing a switch selects the
				corresponding range and released other
				switch depressions. Also used to select
				conductance and the diode test.

* For safe operation, fully insert the A81.

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8062A

Instruction Manual

Table 2-1. Controls, Indicators and Connectors (cont)

	Item	Name	Function
	No.
	10	Tilt Bail	A fold-out stand. The bail may also be
			removed (press on one of the legs at the
			hinge of the bail) and reinserted from the top
			as a hook for hanging the instrument.
	11	Power Switch	Slide switch for turning instrument on or off.
	12	Display	4½ digit LCD display (19999 maximum) with
			decimal point, minus sign, over-range,
			continuity and relative indicators.

2-7. Display

The 8062A provides measurement results on the 4-1/2 digit LCD display (refer to Figure 2-4 or your instrument). The decimal point is placed automatically. Symbols in the upper portion of the display indicate when one of the secondary functions is enabled. The measurement units are indicated by the range switch that is pushed in. Leading zeroes not displayed.

							Visible Continuity				Audible
										Continuity
Continuity							Enabled
Indicator										Enabled
											Relative
Low Battery											Function
Indicator											in Use

dy06f.eps

Figure 2-4. 8062A Display

If you are taking a measurement and the OL symbol appears on the display (Figure 2-5), an overrange condition is indicated, meaning that the input is higher than the range selected. You should select a higher range for the measurement. The OL symbol 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 OL to appear.

2-8