Tenma 72-7935 Operating Manual
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Tenma 72-7935 Operating Manual

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  • Page 2: Table Of Contents

    Model 72-7935: OPERATING MANUAL Table of Contents (1) Table of Contents Title Page Overview Inspection Safety Information Rules For Safe Operation International Electrical Symbols The Meter Structure Functional Buttons Measurement Operation A. DC Voltage Measurement B. AC Voltage Measurement C. Measuring Resistance D.
  • Page 3 Model 72-7935: OPERATING MANUAL Table of Contents (2) Title Page Sleep Mode General Specifications Accuracy Specifications A. DC Voltage B. AC Voltage C. Resistance Test D. Frequency E. Duty Cycle F. Diodes and Continuity Test G. Capacitance Maintenance A. General Service...

  • Page 4: Overview

    To avoid the risk of injury from electric shock, read the “Safety Information” and “Rules For Safe Operation” carefully before using the meter. The Digital Multimeter Model 72-7935 (hereafter referred to as the meter) is a highly reliable handheld measuring instrument featuring a variety of functions in a compact design.

  • Page 5: Inspection

    Model 72-7935: OPERATING MANUAL Unpacking Inspection Inspection This meter includes the following items: Item Description English Operating Manual 1 piece Built-In Test Lead 1 pair Vinyl Holder 1 piece 3V Button Battery (CR2032) 1 piece In the event items missing or damaded, please contact your dealer immediately.

  • Page 6: Safety Information

    Model 72-7935: OPERATING MANUAL Safety Information Safety Information This Meter complies with the standards IEC61010: in pollution degree 2, overvoltage category (CAT. II 300V) and double insulation. CAT. II: Local level, appliance, PORTABLE EQUIPMENT etc., with smaller transient voltage overvoltages than CAT. III Use the Meter only as specified in this operating manual, otherwise the protection provided by the Meter may be impaired.

  • Page 7: Rules For Safe Operation

    Model 72-7935: OPERATING MANUAL Rules For Safe Operation (1) Rules For Safe Operation Warning To avoid possible electric shock or personal injury, and to avoid possible damage to the Meter or to the equipment under test, adhere to the following rules: Before using the Meter inspect the case.
  • Page 8 Model 72-7935: OPERATING MANUAL Rules For Safe Operation (2) When using the Meter at an effective voltage over 60V DC 30V rms AC, special care should be taken for there is danger of electric shock. Use the proper terminals, function, and range for your measurements.
  • Page 9 Model 72-7935: OPERATING MANUAL Rules For Safe Operation (3) When servicing the Meter, use only the same model number or identical electrical specifications replacement parts. The internal circuit of the Meter shall not be altered at will to avoid damage of the Meter and any accident.

  • Page 10: International Electrical Symbols

    Model 72-7935: OPERATING MANUAL International Electrical Symbols International Electrical Symbols Low Battery AC (Alternating Current) Capacitance Double Insulated Warning. Refer to the Operating Manual Conforms to Standards of European Union Ground DC (Direct Current) Diode Continuity Test Fuse...

  • Page 11: The Meter Structure

    Model 72-7935: OPERATING MANUAL The Meter Structure The Meter Structure (see figure 1) 1. LCD Display 2. SELECT Button 3. RELATIVE Mode Button 4. DATA HOLD Button 5. Hz/DUTY Button 6. Rotary Switch 7. Black Test Lead 8. Red Test Lead...

  • Page 12: Functional Buttons

    Model 72-7935: OPERATING MANUAL Functional Buttons Functional Buttons Button Operation Performed Press SELECT to switch between resistance, capacitance, continuity buzzer and SELECT diode measurement modes; the Meter beeps. Resistance measurement is default. Press RELATIVE to enter and exit the REL mode in any measuring mode except RELATIVE in frequency/duty cycle;...

  • Page 13: Measurement Operation

    Model 72-7935: OPERATING MANUAL Measurement Operation(1) Measurement Operation Make sure the Sleep Mode is not on if there is no display on the LCD after turning on the Meter. Make sure the Low Battery Display is not on, otherwise false readings may occour.

  • Page 14: Dc Voltage Measurement

    Model 72-7935: OPERATING MANUAL Measurement Operation(2) A. DC Voltage Measurement (see figure 2) Black ( figure 2)
  • Page 15 Model 72-7935: OPERATING MANUAL Measurement Operation (3) To measure DC voltage, connect the Meter as follows: 1. Set the rotary switch to DCV range. 2. Connect the test leads across with the object being measured with red test lead to the positive and black test lead to the negative.

  • Page 16: Ac Voltage Measurement

    Model 72-7935: OPERATING MANUAL Measurement Operation (4) B. AC Voltage Measurement (see figure 2 with dotted line) Warning To avoid harm to you or damage to the Meter from electric shock, please do not attempt to measure voltages higher than 300V although readings may be obtained and take extra care when measuring high voltage.

  • Page 17: Measuring Resistance

    Model 72-7935: OPERATING MANUAL Measurement Operation (5) C. Measuring Resistance (see figure 3) Hz/Duty Black ( figure 3)
  • Page 18 Model 72-7935: OPERATING MANUAL Measurement Operation(6) Warning To avoid damage to the Meter or to the devices under test, disconnect circuit power and discharge all the high-voltage capacitors before measuring resistance. To measure resistance, connect the Meter as follows: Ω...
  • Page 19 Model 72-7935: OPERATING MANUAL Measurement Operation(7) For high resistance (>1MΩ), it normally requires several seconds to obtain a stable reading. When there is no input, for example in open circuit condition, the Meter displays “OL”. When resistance measurement has been completed, disconnect the connection...

  • Page 20: Frequency And Duty Cycle Measurement

    Model 72-7935: OPERATING MANUAL Measurement Operation(8) D. Frequency and Duty Cycle Measurement (see figure 3 with dotted line) Warning To avoid harm to you or damage to the Meter, do not attempt to measure voltages higher than 60V DC or 30V rms AC although readings may be obtained.

  • Page 21: Measuring Diodes & Continuity

    Model 72-7935: OPERATING MANUAL Measurement Operation(9) E. Measuring Diodes & Continuity (see figure 3 with dotted line) Warning To avoid damage to the Meter or to the equipment under test, disconnect circuit power and discharge all high-voltage capacitors before measuring diodes and continuity.
  • Page 22 Model 72-7935: OPERATING MANUAL Measurement Operation(10) 2. Press SELECT button to select diode test. 3. For forward voltage drop readings on any semiconductor component, place the red test lead on the component’s anode and place the black test lead on the component’s cathode.
  • Page 23 Model 72-7935: OPERATING MANUAL Measurement Operation(11) Testing for Continuity To test for continuity, connect the Meter as below: Ω 1. Set the rotary switch to range. 2. Press SELECT button to select continuity test. 3. Connect the test leads across with the object being measured.

  • Page 24: Capacitance Measurement

    Model 72-7935: OPERATING MANUAL Measurement Operation(12) F. Capacitance Measurement (see figure 3 with dotted line) Warning To avoid damage to the Meter or to the equipment under test, disconnect the tested circuit power when measuring on line capacitors and discharge all high- voltage capacitors before measuring capacitance.
  • Page 25 Model 72-7935: OPERATING MANUAL Measurement Operation(13) Note For testing the capacitor with polarity, connect the red test lead to anode & black test lead to cathode For measuring capacitance higher than 100µF, it normally requires several secends to obtain a stable reading.

  • Page 26: Sleep Mode

    Model 72-7935: OPERATING MANUAL Sleep Mode Sleep Mode To preserve battery life, the meter enters sleep mode after 15 minutes of inactivity. In this mode, the battery current draw is approximately 10µA. The meter can be reactivated by pressing the SELECT button.

  • Page 27: General Specifications

    Model 72-7935: OPERATING MANUAL General Specifications General Specifications Maximum voltage between any Terminals and Ground: 300VAC RMS or 300VDC Range: Auto ranging. Maximum Display: 3999. (3 3/4 digits) Mesaurement Speed: Updates 3 times/second. Operating Temperature: 0 C~40 C(32 F~104 F), Relative Humidity: 75...

  • Page 28: Accuracy Specifications

    Model 72-7935: OPERATING MANUAL Accuracy Specifications(1) Accuracy Specifications Accuracy: (a% reading + b digits), guarantee for 1 year. Operating temperature: 23 Relative humidity: <75%. Temperature coefficient: 0.1 x (specified accuracy) / 1...

  • Page 29: Dc Voltage

    Model 72-7935: OPERATING MANUAL Accuracy Specifications(2) A. DC Voltage Range Resolution Accuracy Overload Protection Remarks (0.8%+3) 400mV 0.1mV 300V DC Input Impedance: 10MΩ 300V AC. (0.8%+1) 10mV 300V 100mV...

  • Page 30: Ac Voltage

    Model 72-7935: OPERATING MANUAL Accuracy Specifications(3) B. AC Voltage Range Resolution Accuracy Overload Protection Remarks Input Impedance: 10MΩ. Frequency response: (1.2%+3) 300V DC 10mV 40Hz~400Hz. 300V AC. Display effective value of 300V 100mV sine wave (mean value response).

  • Page 31: Resistance Test

    Model 72-7935: OPERATING MANUAL Accuracy Specifications(4) C. Resistance Test Range Resolution Accuracy Overload Protection Remarks (1.2%+2) 400Ω 0.1Ω 4kΩ 1Ω (1%+2) 40kΩ 10Ω Open circuit voltage: 250V AC approx. 0.45V 400kΩ 100Ω (1.2%+2) 4MΩ 1kΩ (1.5%+2) 40MΩ 10kΩ...

  • Page 32: Frequency

    Model 72-7935: OPERATING MANUAL Accuracy Specifications(5) D. Frequency Range Resolution Accuracy Overload Protection Remarks The inputted voltage 99.99Hz 0.01Hz is sine wave 999.9Hz 0.1Hz When 10Hz ~10kHz: 250V AC (0.5%+3) 1V rms 9.999kHz 0.001kHz When 10kHz~100kHz: 30V rms. 99.99kHz 0.01kHz...

  • Page 33: Duty Cycle

    Model 72-7935: OPERATING MANUAL Accuracy Specifications(6) E. Duty Cycle Range Resolution Overload Protection Remarks Press Hz/DUTY button at ACV 0.1% ~ range to select Duty Cycle 0.1% 250V AC 99.9% measurement mode. Reading is only for reference, F. Diodes and Continuity Test...

  • Page 34: Capacitance

    Model 72-7935: OPERATING MANUAL Accuracy Specifications(7) G. Capacitance Range Resolution Accuracy Overload Protection Remarks Reading is only for reference 0.001nF 40nF 0.01nF Open circuit voltage: around 400nF 0.1nF 0.45V (4%+3) 250V AC Measuring under Relative 4µF 0.001µF mode. 40µF 0.01µF...

  • Page 35: Maintenance

    Model 72-7935: OPERATING MANUAL Maintenance(1) Maintenance This section provides basic maintenance information including battery and fuse replacement instruction. Warning Do not attempt to repair or service your Meter unless you are qualified to do so and have the relevant calibration, performance test, and service information.

  • Page 36: General Service

    Model 72-7935: OPERATING MANUAL Maintenance(2) A. General Service Periodically wipe the case with damp cloth and mild detergent. Do not use chemical solvent. To clean the terminals with cotton bar with detergent, as dirt or moisture in the terminals can affect readings.

  • Page 37: Replacing The Battery

    Model 72-7935: OPERATING MANUAL Maintenance(3) B. Replacing the Battery (see figure 4) SCREW (figure 4)
  • Page 38 Model 72-7935: OPERATING MANUAL Maintenance(4) Warning To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the battery indicator appears. To replace battery: 1. Disconnect the connection between the leads and the circuit under test.
  • Page 39 Model 72-7935: OPERATING MANUAL Copyright 2005 Tenma Test Equipment. All rights reserved. Tenma Test Equipment 405 S. Pioneer Blvd. Springboro,Ohio 45066 www.tenma.com...
  • Page 40 Compact Solar LED Torch Specifications •  Charged through any lights source anytime, anywhere as easy as calculator  •  Built-in Lithium battery / LIR2450, 3.6V, 110mAh •  Tested by fully charged battery: 3 LEDs could light up to 2H •  LED: 15,000mcd Φ5  •  Product size: 117mm × 44mm × 13.9mm  Part Number Table Description Part Number Compact Solar LED Torch ET-0630 Important Notice : This data sheet and its contents (the “Information”) belong to the members of the Premier Farnell group of companies (the “Group”) or are licensed to it. No licence is granted  for the use of it other than for information purposes in connection with the products to which it relates. No licence of any intellectual property rights is granted. The Information is subject to change  without notice and replaces all data sheets previously supplied. The Information supplied is believed to be accurate but the Group assumes no responsibility for its accuracy or completeness, any  error in or omission from it or for any use made of it. Users of this data sheet should check for themselves the Information and the suitability of the products for their purpose and not make any    assumptions based on information included or omitted. Liability for loss or damage resulting from any reliance on the Information or use of it (including liability resulting from negligence or where the  Group was aware of the possibility of such loss or damage arising) is excluded. This will not operate to limit or restrict the Group’s liability for death or personal injury resulting from its negligence.  DURATOOL is the registered trademark of the Group. © Premier Farnell plc 2012. www.element14.com www.farnell.com www.newark.com www.cpc.co.uk www.mcmelectronics.com Page <1> 15/06/12 V1.0...
  • Page 41 Wire Stripper Features: • For 22AWG to 10AWG Copper and Aluminum wire • Three tools in one-wire stripper, cutter, and pliers • Red cushion grip handle provides maximum leverage • Length : 6-1/4" Part Number Table Description Part Number Wire Stripper 22-8850 Important Notice : This data sheet and its contents (the “Information”) belong to the members of the Premier Farnell group of companies (the “Group”) or are licensed to it.

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