Owner's Manual AutoRanging Digital MultiMeter Model No. 82139 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.
TABLE OF CONTENT Warranty Safety Instructions Safety Symbols Control and Jacks Symbols and Annunciators Specifications Battery Installation Operating Instructions AutoRanging/ManualRanging Data Hold Relative DC Voltage Measurements AC Voltage Measurements DC Current Measurements AC Current Measurements Resistance Measurements Continuity Check Diode Test Frequency and Duty Cycle Measurements Capacitance Measurements Temperature Measurements Maintenance Replacing Batteries Replacing Fuses Troubleshooting Serv
ONE YEAR FULL WARRANTY ONE YEAR FULL WARRANTY ON CRAFTSMAN MULTIMETER If this CRAFTSMAN 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.
2. 3. 4. 5. 6. 7. USE EXTREME CAUTION when working with high voltages. DO NOT measure voltage if the voltage on the "COM" input jack exceeds 500V above earth ground. NEVER connect the meter leads across a voltage source while the function switch is in the current, resistance, or diode mode. Doing so can damage the meter. ALWAYS discharge filter capacitors in power supplies and disconnect the power when making resistance or diode tests.
CONTROLS AND JACKS 1. 4000 count Liquid Crystal Display with symbolic signs 2. Function switch 3. Positive input jack 4. COM (negative) input jack 5. 10A (positive) input jack for 10A DC or AC measurements 6. Continuity/Diode, Frequency/Duty Cycle or AC/DC selection button. 7. Range pushbutton 8. Data Hold pushbutton 9. Relative pushbutton 10.
SPECIFICATIONS Function DC Voltage (V DC) Range 400mV 4V 40V 400V 600V AC Voltage 400mV (V AC) 4V (40 - 400Hz) 40V 400V 600V DC Current 400µA (A DC) 4000µA 40mA 400mA 10A AC Current 400µA (A AC) 4000µA (40 - 400Hz) 40mA 400mA 10A Resistance 400! 4k! 40k! 400k! 4M! 40M! Resolution 0.1mV 1mV 10mV 100mV 1V 0.1mV 1mV 10mV 100mV 1V 0.1µA 1µA 10µA 100µA 10mA 0.1µA 1µA 10µA 100µA 10mA 0.1! 1! 10! 100! 1k! 10k! 6 Accuracy ±(0.5% reading + 2 digits) ±(1.0% reading + 2 digits) ±(1.5% reading + 2 digits) ±(2.
SPECIFICATIONS Function Range Capacitance 4nF 40nF 400nF 4!F 40µF 200µF Duty Cycle 0.1-99.9% Resolution 1pF 10pF 0.1nF 1nF 10nF 0.1µF 0.1% Frequency Accuracy ±(5.0% reading + 10 digits) ±(5.0% reading + 7 digits) ±(3.5% reading + 5 digits) ±(5.0% reading + 5 digits) ±(1.2% reading + 2 digits) Pulse width: 100µs - 100ms ±(1.5% reading + 5 digits) 9.999Hz 0.001Hz 99.99Hz 0.01Hz ±(1.2% reading + 2 digits) 999.9Hz 0.1Hz 9.999kHz 1Hz 99.99kHz 10Hz 999.9kHz 100Hz 9.999MHz 1kHz ±(1.
SPECIFICATIONS Diode Test Continuity Check Temperature sensor Input Impedance Display Overrange indication Polarity Measurement Rate Auto Power Off Low Battery Indication Batteries Fuses Operating Temperature Storage Temperature Relative Humidity Operating Altitude Weight Size Safety Test current of 0.3mA maximum, open circuit voltage 1.5V DC typical Audible signal will sound if the resistance is less than approximately 30!, test current <0.7mA Requires type K thermocouple 7.
BATTERY INSTALLATION WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the battery door. 1. Disconnect the test leads from the meter. 2. Remove the protective rubber boot (if installed). 3. Open the battery door by loosening the screw using a Phillips head screwdriver. 4. Insert the batteries into battery holder, observing the correct polarity. 5. Put the battery door back in place. Secure with the two screws.
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. This meter has Auto OFF that automatically shuts the meter OFF if 15 minutes elapse between uses. 2. If “OL” appears in the display during a measurement, the value exceeds the range you have selected. Change to a higher range.
RELATIVE The relative measurement feature allows you to make measurements relative to a stored reference value. A reference voltage, current, etc. can be stored and measurements made in comparison to that value. The displayed value is the difference between the reference value and the measured value. 1. Perform any measurement as described in the operating instructions. 2. Press the RELATIVE button to store the reading in the display and the "REL" indicator will appear on the display. 3.
AC VOLTAGE MEASUREMENTS WARNING: Risk of Electrocution. 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 the outlet actually has voltage on it. Make sure the probe tips are touching the metal contacts inside the outlet before assuming that no voltage is present. CAUTION: Do not measure AC voltages if a motor on the circuit is being switched ON or OFF.
6. Remove power from the circuit under test, then open up the circuit at the point where you wish to measure current. 7. Touch the black test probe tip to the negative side of the circuit. Touch the red test probe tip to the positive side of the circuit. 8. Apply power to the circuit. 9. Read the current in the display. The display will indicate the proper decimal point, value and symbol.
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 switch to the ! position. 2. Insert the black test lead banana plug into the negative (COM) jack and the red test lead banana plug into the positive ! jack. 3. Touch the test probe tips across the circuit or part under test.
DIODE TEST WARNING: To avoid electric shock, do not test any diode that has voltage on it. 1. Set the function switch to position. 2. Press the button until the symbol appears in the display. 3. Insert the black test lead banana plug into the negative (-) jack (COM) and the red test lead banana plug into the positive (+) jack (!). 4. Touch the test probe tips to the diode or semiconductor junction you wish to test. Note the meter reading. 5. Reverse the probe polarity by switching probe position.
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 switch to the CAP position. (“nF” and a small value will appear in the display). 2. Insert the black test lead banana plug into the negative (-) jack (COM) and the red test lead banana plug into the positive (+) jack (CAP). 3.
MAINTENANCE WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the back cover or the battery or fuse doors. WARNING: To avoid electric shock, do not operate your meter until the battery and fuse doors are in place and fastened securely. This MultiMeter is designed to provide years of dependable service, if the following care instructions are performed: 1. KEEP THE METER DRY. If it gets wet, wipe it off. 2. USE AND STORE THE METER IN NORMAL TEMPERATURES.
WARNING: To avoid electric shock, do not operate your meter until the battery door is in place and fastened securely. REPLACING THE FUSES WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the fuse door. 1. Disconnect the test leads from the meter and any item under test. 2. Open the fuse door by loosening the screw on the door using a Phillips head screwdriver. 3. Remove the old fuse from its holder by gently pulling it out. 4.
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 before use. 2. Check to be sure the batteries are properly installed. 3. Check to be sure the batteries are good. 4. If the battery is good and the meter still does not operate, check to be sure that both ends of the fuse are properly installed.
