Craftsman 81079 User Manual

Owner's Manual

True RMS Multimeter with IR Thermometer

Model No. 81079

CAUTION: Read, understand and follow Safety Rules and Operating Instructions in this manual before using this product.

•Safety

•Operation

•Maintenance

•Español

© Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.

www.craftsman.com

062006

TABLE OF CONTENTS

Warranty	Page 3
Safety Instructions	4
Safety Symbols	5
Control and Jacks	6
Symbols and Annunciators	6
Specifications	7
Battery Installation	10
Operating Instructions	11
DC Voltage Measurements	11
AC Voltage Measurements	12
DC Current Measurements	13
AC Current Measurements	14
Resistance Measurements	15
Continuity Check	16
Diode Test	16
Contact Temperature Measurements	17
Non-Contact Temperature Measurements	18
Capacitance Measurements	19
Frequency Measurements	20
% Duty Cycle Measurements	20
Autorange/Manual Range Selection	21
Relative Mode	21
Display Backlight	21
Data Hold	22
Auto Power Off	22
Low Battery indication	22
Wrong Connection Indication	22
Maintenance	23
Battery Replacement	24
Fuse Replacement	25
Troubleshooting	26
Service and Parts	26

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ONE YEAR FULL WARRANTY

ONE YEAR FULL WARRANTY ON CRAFTSMAN PROFESSIONAL TRUE RMS MULTIMETER

If this CRAFTSMAN Professional True RMS Multimeter fails to give complete satisfaction within one year from the date of purchase, RETURN IT TO THE NEAREST SEARS STORE OR OTHER CRAFTSMAN OUTLET IN THE UNITED STATES, and Sears will replace it, free of charge.

This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

Sears, Roebuck and Co., Dept. 817WA, Hoffman Estates, IL 60179

For Customer Assistance Call 9am - 5pm (ET)

Monday through Friday 1-888-326-1006

WARNING: USE EXTREME CAUTION IN THE USE OF THIS DEVICE. Improper use of this device can result in injury or death. Follow all safeguards suggested in this manual in addition to the normal safety precautions used in working with electrical circuits. DO NOT service this device if you are not qualified to do so.

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SAFETY INSTRUCTIONS

This meter has been designed for safe use, but must be operated with caution. The rules listed below must be carefully followed for safe operation.

1.NEVER apply voltage or current to the meter that exceeds the specified maximum:

	Input Limits
Function		Maximum Input
V DC or V AC		600V DC/AC, 200Vrms on 400mV
		range
mA AC/DC		500mA 250V fast acting fuse
A AC/DC		20A 250V fast acting fuse(30
		seconds max every 15 minutes)
Frequency, Resistance,		250Vrms for 15sec max
Capacitance, Duty Cycle,
Diode Test, Continuity
Temperature		60V DC/24V AC

2.USE EXTREME CAUTION when working with high voltages

3.DO NOT measure voltage if the voltage on the "COM" input jack exceeds 600V above earth ground

4.DO NOT measure current of circuits whose voltage is greater than 500V above earth ground

5.NEVER connect the meter leads across a voltage source while the function switch is in the resistance or diode mode. Doing so can damage the meter

6.ALWAYS turn off the power and disconnect the test leads before opening the cover to replace the fuse or battery

7.NEVER operate the meter unless the back cover is in place and fastened securely

4

SAFETY SYMBOLS

WARNING

CAUTION

MAX 600V

This symbol adjacent to another symbol, terminal or operating device indicates that the operator must refer to an explanation in the Operating Instructions to avoid personal injury or damage to the meter.

This WARNING symbol indicates a potentially hazardous situation, which if not avoided, could result in death or serious injury.

This CAUTION symbol indicates a potentially hazardous situation, which if not avoided, may result damage to the product.

This symbol advises the user that the terminal(s) so marked must not be connected to a circuit point at which the voltage with respect to earth ground exceeds (in this case) 600 VAC or VDC.

This symbol adjacent to one or more terminals identifies them as being associated with ranges that may, in normal use, be subjected to particularly hazardous voltages. For maximum safety, the meter and its test leads should not be handled when these terminals are energized.

This symbol indicates that a device is protected throughout by double insulation or reinforced insulation.

This symbol indicates there is a potential hazard from a laser light source.

5

CONTROLS AND JACKS

1. IR Thermometer and laser pointer

2. 4000 count LCD display

3. HOLD and Backlite button

4. SELECT button

5. Function switch

6. mA, uA and A input jacks

7. COM input jack

8. Positive input jack

9. RANGE hold button

10. RELATIVE button

11. Laser pointer button

Note: Tilt stand and battery compartment are on rear of unit.

SYMBOLS AND ANNUNCIATORS

•))) Continuity Diode test Laser pointer Battery status

Test lead connection error

n nano (10-9) (capacitance)

!micro (10-6) (amps, cap)

m	milli (10-3) (volts, amps)	A	Amps
k	kilo (103) (ohms)	F	Farads (capacitance)
M	mega (106) (ohms)	!	Ohms
Hz	Hertz (frequency)	V	Volts
%	Percent (duty ratio)	REL	Relative
AC	Alternating current	AUTO	Autoranging
DC	Direct current	HOLD	Data hold
ºF	Degrees Fahrenheit	ºC	Degrees Centigrade

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SPECIFICATIONS

Function	Range	Resolution			Accuracy
DC	400mV	0.1mV			±(0.3% reading + 2 digits)
Voltage
	4V	0.001V
	40V	0.01V			±(0.5% reading + 2 digits)
	400V	0.1V
	600V	1V			±(0.8% reading + 3 digits)
AC					50 to 400Hz	400Hz to 1kHz
Voltage	400mV	0.1mV			±(1.5% reading	±(2.5% reading
					+ 15 digits)	+ 15digits)
	4V	0.001V			±(1.5% reading	±(2.5% reading
	40V	0.01V
					+ 6 digits)	+ 8 digits)
	400V	0.1V
	600V	1V			±(1.8% reading	±(3% reading +
					+ 6 digits)	8 digits)
DC	400 A	0.1 A
Current
	4000 A	1 A			±(1.5% reading + 3 digits)
	40mA	0.01mA
	400mA	0.1mA
	4A	0.001A			±(2.5% reading + 5 digits)
	20A	0.01A
AC					50 to 400Hz	400Hz to 1KHz
Current		0.1		A
	400 A
	4000 A	1 A			±(1.8% reading	±(3.0% reading
	40mA	0.01mA			+ 8 digits)	+ 7 digits)
	400mA	0.1mA
	4A	0.001A			±(3.0% reading	±(3.5% reading
	20A	0.01A			+ 8 digits)	+ 10 digits)

NOTE: Accuracy is stated at 65oF to 83oF (18oC to 28oC) and less than 75% RH.

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Function	Range	Resolution			Accuracy
Resistance	400!	0.1!			±(0.8% reading + 4 digits)
	4k!	0.001k!			±(0.8% reading + 2 digits)
	40k!	0.01k!
					±(1.0% reading + 2 digits)
	400k!	0.1k!
	4M!	0.001M!
	40M!	0.01M!			±(3.0% reading + 5 digits)
Capacitance	40nF	0.01nF			±(5.0% reading + 7 digits)
	400nF	0.1nF			±(3.0% reading + 5 digits)
	4 F	0.001 F			±(3.5% reading + 5 digits)
	40 F	0.01 F
	100 F	0.1 F			±(5.0% reading + 5 digits)
Frequency	5.000Hz	0.001Hz			±(1.5% reading + 5 digits)
	50.00Hz	0.01Hz
	500.0Hz	0.1Hz
	5.000kHz	0.001kHz			±(1.2% reading + 2 digits)
	50.00kHz	0.01kHz
	500.0kHz	0.1kHz
	5.000MHz	0.001MHz			±(1.5% reading + 4 digits)
	10.00MHz	0.01MHz
	Sensitivity: 0.8V rms min. <100kHz; 5Vrms min > 100kHz.
Duty Cycle	0.1 to 99.9%		0.1%	±(1.2% reading + 2 digits)
	Pulse width: 100!s - 100ms, Frequency: 5Hz to 150kHz
Temp	-4 to 1382°F		1°F	±(3.0% reading + 3 digits)
(type-K)	°		°	(probe accuracy not included)
	-20 to 750 C		1 C
Temp	-4 to 518°F		1°F	±2.0% reading or ±2°C, ± 4 °F
(IR)	°		°
	-20 to270 C		1 C

NOTE: Accuracy specifications consist of two elements:

•(% reading) – This is the accuracy of the measurement circuit.

•(+ digits) – This is the accuracy of the analog to digital converter.

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