Tenma 72-7730A Operating Manual
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Tenma 72-7730A Operating Manual

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  • Page 1 72-7730A 72-7732A...

  • Page 2: Table Of Contents

    Model 72-7730A/72-7732A: OPERATING MANUAL TABLE OF CONTENTS CHAPTER TITLE PAGE Before You Start Overview Inspection Safety Information Rules For Safe Operation International Electrical Symbols Getting Acquainted Turning the Meter On Battery Considerations Automatic Power Off Automatic Backlight Off Low Battery Indication...
  • Page 3 Model 72-7730A/72-7732A: OPERATING MANUAL CHAPTER TITLE PAGE Analogue Bar Graph Using MAX MIN Making Measurements Introduction A. Measuring Voltage B. Measuring Current C. Measuring Resistance D. Testing for Continuity E. Testing Diodes F. Measuring Capacitance G. Measuring Frequency / Duty Cycle H.
  • Page 4 Model 72-7730A/72-7732A: OPERATING MANUAL CHAPTER TITLE PAGE Changing the Default Setting Introduction Selecting Setup Options Maintenance A. General Service B. Replacing the Fuses C. Replacing the Battery Specifications Safety and Compliances Physical Specifications General Specifications Feature Summary Basic Specifications Detailed Accuracy Specifications A.
  • Page 5 Model 72-7730A/72-7732A: OPERATING MANUAL CHAPTER TITLE PAGE D. AC Current E. Resistance F. Continuity Test G. Diode Test H. Capacitance I. Frequency J. Temperature Degrees Celsius Fahrenheit K. 4~20mA loop current...

  • Page 6: Before You Start

    Meter. Digital Multimeter 72-7730A (hereafter referred to as the Meter ) is a 20,000 count, 4-1/2 digit, Digital Multimeter 72-7732A (hereafter referred to as the Meter ) is a 40,000 count, 4-3/4 digit, highly reliable auto ranging instrument.

  • Page 7: Inspection

    Model 72-7730A/72-7732A: OPERATING MANUAL Inspection Open the package case and take out the Meter. Check the items shown on Table 1-1 carefully to see if any items are missing or damaged. Table 1-1. Unpacking Inspection Item Description 1 piece English Operating Manual...

  • Page 8: Safety Information

    Model 72-7730A/72-7732A: OPERATING MANUAL Safety Information Rules For Safe Operation This Meter complies with the standards IEC61010 safety Warning measurement requirement: in pollution degree 2, To avoid possible electric shock or personal injury, overvoltage category (CAT. III 1000V, CAT.IV 600V) and to avoid possible damage to the Meter or to the and double insulation.
  • Page 9 Model 72-7730A/72-7732A: OPERATING MANUAL When the Meter working at an effective voltage over When servicing the Meter, use only the same model 60V in DC or 30V rms in AC, special care should be number or identical electrical specifications taken for there is danger of electric shock.

  • Page 10: International Electrical Symbols

    Model 72-7730A/72-7732A: OPERATING MANUAL International Electrical Symbols Symbols used on the Meter and in this manual are explained in Table1-2. Table 1-2. International Electrical Symbols AC or DC Measurement DC Measurement AC Measurement Ground Double Insulated Warning. Refer to the Operating Manual...

  • Page 11: Getting Acquainted

    Model 72-7730A/72-7732A: OPERATING MANUAL Chapter 2 Getting Acquainted Turning the Meter On The automatic power off is preset to 10 minutes. From the Setup menu (see Chapter 5), you could specify a To turn the Meter on, turn the rotary switch from OFF time (10 minutes, 20 minutes, 30 minutes or OFF).

  • Page 12: Low Battery Indication

    Model 72-7730A/72-7732A: OPERATING MANUAL Low Battery Indication A constant battery icon ( ) in the upper left corner of the display notifies you that the batteries are low and should be replaced. Warning To avoid false readings, which could lead to possible...

  • Page 13: Rotary Switch

    Model 72-7730A/72-7732A: OPERATING MANUAL Rotary Switch Turn the Meter on by selecting any measurement function. The Meter presents a standard display for that function. The display may also be influenced by some of the choices made in Setup. Use the blue button to select any rotary switch alternate function (labeled in blue letters).

  • Page 14: Resistance

    Model 72-7730A/72-7732A: OPERATING MANUAL Table 2-1. Rotary Switch Selections Rotary Rotary Switch Function Blue Key Function Switch Position Resistance measurement Diode test Continuity test Capacitance measurement None Frequency measurement Frequency signal duty cycle measurement Centigrade temperature measurement Fahrenheit temperature measurement µA...

  • Page 15: Functional Buttons

    Model 72-7730A/72-7732A: OPERATING MANUAL Functional Buttons The buttons activate features that augment the function selected with the rotary switch. The buttons are shown in Table 2-2. RECALL STORE Press the button once to access the main feature (e.g. STORE). To access the first additional feature of the button (e.g. RECALL), press and hold the button for over 1 second.
  • Page 16 Model 72-7730A/72-7732A: OPERATING MANUAL Table 2-2. Functional Buttons Button Description Access Method Range feature: Press the button once. Exit AUTO and enter MANUAL ranging. In MANUAL, select SETUP next input range. EXIT to return to AUTO. AUTO is default. RANGE...
  • Page 17 Model 72-7730A/72-7732A: OPERATING MANUAL Table 2-2. Functional Buttons Button Description Access Method RECALL Store feature: Press the button STORE Store the current measurement value. Press EXIT to exit once. the Store feature. Recall feature: Press and hold the button for over 1 Recall the stored value.
  • Page 18 Model 72-7730A/72-7732A: OPERATING MANUAL Table 2-2. Functional Buttons Button Description Access Method Peak HOLD In Setup, each press to select the digit you want to edit. Press the button once after entering HOLD In Recall, press to enable SEND feature Setup or Recall or Store mode.
  • Page 19 Model 72-7730A/72-7732A: OPERATING MANUAL Table 2-2. Functional Buttons Button Description Access Method Press to display max, min and average values. Press the button once. MAXMIN Press EXIT to stop and return to current measurement mode. In Setup, each press to decrement an Option.
  • Page 20 Model 72-7730A/72-7732A: OPERATING MANUAL Table 2-2. Functional Buttons Button Description Access Method Press to enter relative mode, the primary display shows Press the button once. The left secondary display shows the present measurement value. The right secondary display shows the stored value.
  • Page 21 Model 72-7730A/72-7732A: OPERATING MANUAL Table 2-2. Functional Buttons Button Description Access Method Use the blue button to select any rotary switch alternate Press the button once function (labeled in blue letters). Press and hold the Button while turning on the Meter to Blue Button toggle to 4000 counts for all functions.

  • Page 22: The Meter Functions Vs Displays

    Model 72-7730A/72-7732A: OPERATING MANUAL The Meter Functions Vs Displays Table 2-3 shows the cross reference of function and display: Table 2-3 Functions Vs Displays Function Primary Display Right Secondary Display Left Secondary Display Full range: 4, 40, 400, 1000 The tested DC voltage value...
  • Page 23 Model 72-7730A/72-7732A: OPERATING MANUAL Table 2-3 Functions Vs Displays Function Primary Display Right Secondary Display Left Secondary Display Full range: 400, 4000 The tested ACµA value The tested frequency value: ACµA 45.00Hz~10.00kHz Full range: 40, 400 DCmA The tested DCmA value...
  • Page 24 Model 72-7730A/72-7732A: OPERATING MANUAL Table 2-3 Functions Vs Displays Function Primary Display Right Secondary Display Left Secondary Display The recalled value The total number of stored value. Index number: no.0001~no.0100 Chapter 2 Getting Acquainted - Using MAX MIN MAX MIN...

  • Page 25: Selecting The Range

    Model 72-7730A/72-7732A: OPERATING MANUAL Selecting the Range Press RANGE to select either a fixed range or the autorange feature. Autoranging (AUTO lighted in the display) always comes on initially when you select a new function. In autorange, the Meter selects the lowest input range possible, ensuring that the reading appears with the highest available resolution.
  • Page 26 Model 72-7730A/72-7732A: OPERATING MANUAL Table 2-4. Display Features Symbol Meaning Maximum reading displayed. Minimum reading displayed The sequence of the reading. C, F Degrees Celsius (default) or Fahrenheit. Indicates negative reading The battery is low. 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.
  • Page 27 Model 72-7730A/72-7732A: OPERATING MANUAL Table 2-4. Display Features Symbol Meaning TrueRMS Indicator for True RMS value. AC+DC For DCV and DCA functions, reading represents the True RMS total of AC and DC measurements , k , M : Ohm. The unit of resistance.
  • Page 28 Model 72-7730A/72-7732A: OPERATING MANUAL Table 2-4. Display Features Symbol Meaning nF,µF, Farad. The unit of capacitance nF: Nanofarad. 1x10 -9 or 0.000000001 farads. µF:Microfarad.1x10 -6 or 0.000001 farads. mF: Millifarad. 1x10 -3 or 0.001 farads. Automatic power off feature is on...
  • Page 29 Model 72-7730A/72-7732A: OPERATING MANUAL Table 2-4. Display Features Symbol Meaning Backlight feature is on HOLD Data hold mode is active PEAK HOLD Peak hold mode is active Diode test Frequency signal duty cycle. 4~20mA loop current as % reading The input value is too large for the selected range.

  • Page 30: Analogue Bar Graph

    Model 72-7730A/72-7732A: OPERATING MANUAL Analog Bar Graph display. The minimum reading and MIN are shown on the right secondary display. The primary display shows The bar graph provides an analog indication of the the maximum value. measured input. For most measurement functions, the bar graph updates 10 times per second.

  • Page 31: Making Measurements

    Model 72-7730A/72-7732A: OPERATING MANUAL Chapter 3 Making Measurement Introduction Chapter 3 explains how to make measurements. Most measurement functions can be selected by using the rotary switch. While letters or symbols identify primary functions; blue letters or symbols identify alternative functions. Press the BLUE button to access these alternate functions.
  • Page 32 Model 72-7730A/72-7732A: OPERATING MANUAL To measure voltage, set up the Meter as Figure 3-1 Note and do the following: When measuring voltage, the Meter acts around a Insert the red test lead into the V terminal and the 10M ( ) or 2.5G (...

  • Page 33: Measuring Current

    Model 72-7730A/72-7732A: OPERATING MANUAL B. Measuring Current Warning If the fuse burns out during measurement, the Meter may be damaged or the operator may be hurt. To avoid possible damage to the Meter or to the equipment under test, check the Meterís fuses before measuring current.
  • Page 34 Model 72-7730A/72-7732A: OPERATING MANUAL DC measurement is default, press blue button to Note select AC measurement. If the value to be measured is unknown, use the Open the circuit path to be tested. Touch the red maximum measurement position and reduce the testing leads to the more positive side of the break;...

  • Page 35: Measuring Resistance

    Model 72-7730A/72-7732A: OPERATING MANUAL C. Measuring Resistance Warning Do not apply voltage to the test leads while the meter is in the Resistance measurement mode. To avoid possible damages to the Meter or to the devices under test, disconnect circuit power and discharge all the high-voltage capacitors before measuring resistance.

  • Page 36: Testing For Continuity

    Model 72-7730A/72-7732A: OPERATING MANUAL Note D. Testing for Continuity When measuring low resistance, the test leads can Warning add 0.1 to 0.2 of error to resistance measurement. Do not apply voltage to the test leads while the To test the leads, touch the probe tips together and meter is in the Continuity measurement mode.
  • Page 37 Model 72-7730A/72-7732A: OPERATING MANUAL Note When in the continuity mode, the test leads will have open circuit voltage of approximately 1.2VDC. The resistance measurement range is 400ohm. When continuity measurement has been completed, disconnect the connection between the test leads and the circuit under test and remove test leads from the input terminals of the Meter.

  • Page 38: Testing Diodes

    Model 72-7730A/72-7732A: OPERATING MANUAL E. Testing Diodes Warning Do not apply voltage to the test leads while the meter is in the Diode test mode. To avoid damages to the Meter or to the devices under test, disconnect circuit power and discharge all the high-voltage capacitors before testing diodes.
  • Page 39 Model 72-7730A/72-7732A: OPERATING MANUAL l When diode testing has been completed, disconnect For forward voltage drop readings on any semiconductor component, place the red test lead on the componentís the connection between the test leads and the circuit anode and place the black test lead on the componentís under test and remove test leads from the input cathode.

  • Page 40: Measuring Capacitance

    Model 72-7730A/72-7732A: OPERATING MANUAL F. Measuring Capacitance Warning To ensure accuracy, the meter will first internally discharge the capacitor under test. DIS. C will show on the display. Depending upon the size of the capacitor and the amount of discharge required, this process may be somewhat slow.
  • Page 41 Model 72-7730A/72-7732A: OPERATING MANUAL l When capacitance measurement has been Set the rotary switch to measurement mode, the Meter may display a fixed reading which is a completed, disconnect the connection between the internal distributed capacitor value. For best accuracy...

  • Page 42: Measuring Frequency / Duty Cycle

    Model 72-7730A/72-7732A: OPERATING MANUAL G. Measuring Frequency / Duty Cycle Warning To avoid personal injury, please do not attempt to input voltage higher than 30V rms. To measure frequency and duty cycle, connect the Meter as Figure 3-7 and do the following: Insert the red test lead into the Hz terminal and the black test lead into the COM terminal.
  • Page 43 Model 72-7730A/72-7732A: OPERATING MANUAL Note The requirement of Input amplitude "a" is as follows: When 10Hz~40MHz: 200 mV 30Vrms; >40MHz: Un-specified When frequency measurement has been completed, disconnect the connection between the test leads and the circuit under test and remove test leads from...

  • Page 44: Measuring Temperature

    Model 72-7730A/72-7732A: OPERATING MANUAL H. Measuring Temperature Warning Do not apply voltage to the input terminals when the Meter is in the Temperature Measurement Mode. Set the rotary switch to , the display shows OL. Short circuit the test leads to show the room temperature.

  • Page 45: 4~20Ma Loop Current As % Readout

    Model 72-7730A/72-7732A: OPERATING MANUAL Note The rest procedure, please follow B. Measuring Current: DC current measurement (Figure 3-2). Place the Meter in an environment of 18 C~23 When the readings obtained is: otherwise false reading may be obtained especially < 4mA, the primary display shows LO in testing low temperature.

  • Page 46: Using Stores, Recall And Send Features

    Model 72-7730A/72-7732A: OPERATING MANUAL Chapter 4 Using Store, Recall & Send Features in second by pressing + or - button. The interval can Introduction be as high as 255 seconds or as low as 0 second. Chapter 4 shows you how to use store, recall and Press and hold STORE to access the quick setting.

  • Page 47: Recalling Stored Readings

    Model 72-7730A/72-7732A: OPERATING MANUAL Recalling Stored Readings Using Send When using a Send feature, please refer to the Installation Use the following procedure to recall the stored reading: Guide of the included CD-ROM. Press RECALL to recall the stored value and RCL appears to confirm the operation.

  • Page 48: Changing The Default Setting

    Model 72-7730A/72-7732A: OPERATING MANUAL Chapter 5 Changing the Default Setting Introduction The Meter allows you to change the default operating configuration by changing setup options made at the factory. These settings are stored and can be changed in the Setup mode using the procedure described in this chapter.
  • Page 49 Model 72-7730A/72-7732A: OPERATING MANUAL Table 5-1. Setup Selections Selection Option Factory Default Description Max. 40,000 (model 72-7732A), 20,000 HIGH Over the upper limits, beeps intermittently. (model 72-7730A );Press to select off Press to select the digit you want to edit.
  • Page 50 Model 72-7730A/72-7732A: OPERATING MANUAL Table 5-1. Setup Selections Selection Option Factory Default Description Analog Zero is in the left hand side. Zero is in the Zero is in the center center It can only apply to DCV, DCI and C/ F functions.

  • Page 51: Maintenance

    Model 72-7730A/72-7732A: OPERATING MANUAL Chapter 6 Maintenance This chapter 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 52: Replacing The Fuses

    Model 72-7730A/72-7732A: OPERATING MANUAL B. Replacing the Fuses Warning To avoid electrical shock or arc blast, or personal injury or damage to the Meter, use specified fuses ONLY in accordance with the following procedure. Follow Figure 6-1 and proceed as follows to replace the Meterís fuse:...

  • Page 53: Replacing The Battery

    Model 72-7730A/72-7732A: OPERATING MANUAL C. Replacing the Battery 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. Make sure the test leads are disconnected from the circuit being tested before opening the case bottom.

  • Page 54: Specifications

    Model 72-7730A/72-7732A: OPERATING MANUAL Chapter 7 Specifications Safety and Compliances Refer to different range input protection voltage Maximum Voltage between any Terminal and Ground Certification IEC 61010 CAT.III1000V, CAT.IV 600V overvoltage and double insulation standard Compliances 0.5A,1000V, fast type fuse, 10.3X38mm...

  • Page 55: Physical Specifications

    Model 72-7730A/72-7732A: OPERATING MANUAL Physical Specifications Primary display: 40,000 counts (model 72-7732A), 20,000 counts (model 72-7730A), Display (LCD) Updates 2-3 times / second, Two secondary displays: 4000 counts (model 72-7732A), 2000 counts (model 72- 7730A),Analog: 40 segments; updates 10 times / second...

  • Page 56: General Specifications

    Model 72-7730A/72-7732A: OPERATING MANUAL General Specifications Auto Range Auto Polarity Display OL Overload Except at 4~20mA loop range displays HI or LO Display Low Battery...

  • Page 57: Feature Summary

    Feature Summary Tri Digital Displays Primary: 40,000 counts (Model 72-7732A), 20,000 counts (Model 72-7730A) Left Secondary: 4000 counts (Model 72-7732A), 2000 counts (Model 72-7730A) Right Secondary: 4000 counts (Model 72-7732A), 2000 counts (Model 72- Analogue Bar Graph 7730A),Bar Graph: 40 segments, updates 10 times / second Backlight with 2 brightness levels Bright backlight for clear readings in poorly lighted areas.

  • Page 58: Basic Specifications

    Model 72-7730A/72-7732A: OPERATING MANUAL Basic Specifications Function Ranges / Description 0 to 1000V DC Voltage 0 to 1000V, 100kHz bandwidth AC Voltage, True RMS DC Voltage: 72-7730A/72-7732A: 0.05% Basic Accuracy AC Voltage: 72-7730A/72-7732A: 0.6% 0 to 10A (5~10A for 10 seconds, interval...

  • Page 59: Detailed Accuracy Specifications

    Model 72-7730A/72-7732A: OPERATING MANUAL Detailed Accuracy Specifications Accuracy: ([% of reading] + [number of least significant digits), guarantee for 1 year. Operating temperature: 18 C~28 Relative humidity: 75%RH A. DC Voltage Range Accuracy Overload Protection Input Impedance Resolution 72-7730A 72-7732A...

  • Page 60: Ac Voltage

    Model 72-7730A/72-7732A: OPERATING MANUAL B. AC Voltage (AC+DC measurement is available) Accuracy Range Resolution Bandwidth Input Impedance 72-7730A 72-7732A 72-7730A 72-7732A 0.0001V 45Hz~1kHz (0.6%+40) (0.4%+30) 1kHz~10kHz (3%+40) (3%+30) 10kHz~100kHz (7%+40) (6%+30) 0.001V 45Hz~1kHz (0.6%+40) (0.4%+30) 1kHz~10kHz (3%+40) (3%+30) 10kHz~100kHz (7%+40)
  • Page 61 Model 72-7730A/72-7732A: OPERATING MANUAL Remarks: Overload Protection: 1000V. Display: a) True rms are valid from of range to 100% of range b) AC crest factor can be up to 3.0 except 1000V where it is 1.5. c) A residual reading of 80 digits with test leads shorted, will not affect stated accuracy.

  • Page 62: Dc Current

    Model 72-7730A/72-7732A: OPERATING MANUAL C. DC Current Accuracy Range Resolution Overload Protection 72-7730A 72-7732A 72-7730A 72-7732A (0.1%+15) 200µA 400µA 0.01µA (0.15%+20) 2000µA 4000µA 0.1µA 0.5A,1000V, fast type fuse, 10.3X38mm (0.15%+15) 20mA 40mA 0.001mA 200mA 400mA 0.01mA (0.7%+30) (0.5%+30) 0.001A 10A,1000V, fast type fuse, 6.3X32mm...
  • Page 63 Model 72-7730A/72-7732A: OPERATING MANUAL D. AC Current (AC+DC measurement is available) Range Accuracy Overload Protection Resolution Bandwidth 72-7730A 72-7732A 72-7730A 72-7732A 200µA 400µA (0.8 +15) (0.7 +15) 0.01µA 45Hz~1kHz 2000µA 4000µA (1.5 +40) 0.1µA 1kHz~10kHz 0.5A, 1000V, fast type 20mA...
  • Page 64 Model 72-7730A/72-7732A: OPERATING MANUAL E. Resistance Accuracy Range Resolution Overload Protection 72-7730A 72-7732A 72-7730A 72-7732A 0.01 (0.4 +20)+test leads (0.3 +8)+test leads open circuit value open circuit value 0.0001k 1000V (0.4 +20) (0.3 +8) 0.001k 200k 400k 0.01k (0.8 +20) (0.5 +20)
  • Page 65 Model 72-7730A/72-7732A: OPERATING MANUAL G. Diode Test Range Resolution Overload Protection 0.0001V 1000V Remarks: Open circuit voltage approximate 2.8V. A good silicon junction drops between 0.5V and 0.8V. H. Capacitance Range Accuracy Overload Resolution 72-7730A 72-7732A Protection 72-7730A 72-7732A (1.2 +20)+ capacitance...

  • Page 66: Frequency

    Model 72-7730A/72-7732A: OPERATING MANUAL I. Frequency Overload Protection Range Resolution Accuracy 72-7730A 72-7732A 72-7730A 72-7732A 40Hz 20Hz 0.001Hz 400Hz 200Hz 0.01Hz 2kHz 4kHz 0.0001kHz 1 0 0 0 V 40kHz 20kHz 0.001kHz (0.1 +15) (0.01 +8) 400kHz 200kHz 0.01kHz 4MHz 2MHz 0.0001MHz...

  • Page 67: Temperature

    Model 72-7730A/72-7732A: OPERATING MANUAL J. Temperature Degrees Celsius Range Resolution Accuracy Overload Protection +30) 1 0 0 0 V ~400 +30) ~1000 +10) Fahrenheit Range Resolution Accuracy Overload Protection +50) 1 0 0 0 V (1.5 +50) ~752 +18) ~1832...

  • Page 68: 4~20Ma Loop Current

    Model 72-7730A/72-7732A: OPERATING MANUAL K. 4~20 mA loop current Range Resolution Accuracy Overload Protection ( 4 ~ 2 0 m A ) 0.01 (1 +50) 0.5A,1000V, fast type fuse, 6.3X32mm Remarks: When the readings obtained is: < 4mA, the primary display shows LO ..
  • Page 69 Model 72-7730A/72-7732A: OPERATING MANUAL Copyright 2006 Tenma Test Equipment. All rights reserved. Tenma Test Equipment 405 S. Pioneer Blvd. Springboro,Ohio 45066 www.tenma.com...

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