Craftsman 81079 Owner's Manual

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Owner's Manual True RMS Multimeter with IR Thermometer Model No. 81079 © Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A. www.craftsman.com 0...

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2 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 ...

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3 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 NE...

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4 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 specifie...

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5 SAFETY SYMBOLS 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 ...

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6 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 ...

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7 SPECIFICATIONS Function Range Resolution Accuracy 400mV 0.1mV ±(0.3% reading + 2 digits) 4V 0.001V 40V 0.01V 400V 0.1V ±(0.5% reading + 2 digits) DC Voltage 600V 1V ±(0.8% reading + 3 digits) 50 to 400Hz 400Hz to...

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8 Function Range Resolution Accuracy 400! 0.1! ±(0.8% reading + 4 digits) 4k! 0.001k! ±(0.8% reading + 2 digits) 40k! 0.01k! 400k! 0.1k! 4M! 0.001M! ±(1.0% reading + 2 digits) Resistance 40M! 0.01M! ±(3.0% reading + 5 dig...

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9 Diode Test Test current of 0.3mA maximum, open circuit voltage 1.5V DC typical Continuity Check Audible signal will sound if the resistance is less than 150! (approx.), test current <0.7mA Temperature Sensor Requires type K thermocoupl...

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10 BATTERY INSTALLATION WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the battery cover. 1. Disconnect the test leads from the meter. 2. Remove the rear battery cover by removing the tw...

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11 OPERATING INSTRUCTIONS WARNING: Risk of electrocution. High-voltage circuits, both AC and DC, are very dangerous and should be measured with great care. 1. ALWAYS turn the function switch to the OFF position when the meter is not in use. 2...

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12 AC VOLTAGE MEASUREMENTS AC VOLTAGE: The probe tips may not be long enough to contact the live parts inside some 240V outlets for appliances because the contacts are recessed deep in the outlets. As a result, the reading may show 0 volts when...

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13 DC CURRENT MEASUREMENTS CAUTION: Do not make current measurements on the 20A scale for longer than 30 seconds. Exceeding 30 seconds may cause damage to the meter and/or the test leads. 1. Insert the black test lead banana plug into the neg...

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14 AC CURRENT MEASUREMENTS WARNING: To avoid electric shock, do not attempt to measure AC A in circuits that have voltages which exceed 250V AC. CAUTION: Do not make current measurements on the 20A scale for longer than 30 seconds. Exceed...

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15 RESISTANCE MEASUREMENTS WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all capacitors before taking any resistance measurements. Remove the batteries and unplug the line cords. 1. Set the function s...

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16 CONTINUITY CHECK WARNING: To avoid electric shock, never measure continuity on circuits or wires that have voltage on them. 1. Set the function switch to the ! position. 2. Insert the black lead banana plug into the negative (...

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17 CONTACT TEMPERATURE MEASUREMENTS 1. Set the function switch to the (K) ºF or ºC position. 2. Insert the Temperature Probe into the input jacks, making sure to observe the correct polarity. 3. Touch the Temperature Probe head to th...

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18 NON-CONTACT TEMPERATURE MEASUREMENTS 1. Set the function switch to the Non-Contact (IR) ºF or ºC position. 2. Point the meter at the surface to be measured. 3. If needed, press the red IR Laser Pointer button to locate the exact spot being...

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19 CAPACITANCE MEASUREMENTS WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all capacitors before taking any capacitance measurements. Remove the batteries and unplug the line cords. 1. Set the function...

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20 FREQUENCY MEASUREMENTS 1. Set the function switch to the “FREQ %” position. 2. Insert the black lead banana plug into the negative COM jack and the red test lead banana plug into the positive Hz jack. 3. Touch the test probe tips ...

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21 AUTORANGE/MANUAL RANGE SELECTION When the meter is first turned on, it automatically goes into AutoRanging. This automatically selects the best range for the measurements being made and is generally the best mode for most measurements. For m...

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22 DATA HOLD The hold function freezes the reading in the display. Press the HOLD key momentarily to activate or to exit the hold function. Note: In the Frequency mode, Data Hold will function only while a frequency is applied. AUTO POWER OFF ...

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23 MAINTENANCE WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the back cover or the battery cover. WARNING: To avoid electric shock, do not operate your meter until the battery cover i...

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24 BATTERY REPLACEMENT WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the battery cover. 1. When the battery becomes exhausted or drops below the operating voltage, “ ” will appea...

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25 FUSE REPLACEMENT WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the battery cover. 1. Disconnect the test leads from the meter. 2. Remove the protective rubber holster. 3. Remove ...

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26 TROUBLESHOOTING There may be times when your meter does not operate properly. Here are some common problems that you may have and some easy solutions to them. Meter Does Not Operate: 1. Always read all the instructions in this manual befor...