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Model 72-7228: OPERATING MANUAL

Overview

This Operating Manual covers information on safety and cautions. Please read the
relevant information carefully and observe all the

Warnings

and

Notes

strictly.

Warning

To avoid electric shock or personal injury, read the “Safety Information” and
“Rules for Safe Operation” carefully before using the Meter.

Digital Clamp Multimeter

Model

72-7228

(hereafter referred to as “the Meter”) features

3 5/6 digits and a 6666 count display. It uses large scale integrated circuit with double
integrated A/D converter as its core and has full range overload protection.

The Meter will measure AC/DC voltage, AC/DC current, frequency, duty cycle,
resistance, diodes, continuity and surge current.

Содержание 72-7228

Страница 1: ...72 7228 P N 110401100913 Digital Clamp Multimeter...

Страница 2: ...Model 72 7228 OPERATING MANUAL...

Страница 3: ...tional Electrical Symbols The Meter Structure Functional Buttons The Effectiveness of Functional Buttons Display Symbols Measurement Operation A DC AC Voltage Measurement B Measuring Resistance C Test...

Страница 4: ...43 44 45 45 G DC Current Measurement H AC Current Measurement Sleep Mode Specifications A General Specifications B Environmental Requirements Accuracy Specifications A DC Voltage B AC Voltage C Resist...

Страница 5: ...Title Page Model 72 7228 OPERATING MANUAL 47 49 49 50 I AC Current Maintenance A General Service B Replacing the Battery 3...

Страница 6: ...the Safety Information and Rules for Safe Operation carefully before using the Meter Digital Clamp Multimeter Model 72 7228 hereafter referred to as the Meter features 3 5 6 digits and a 6666 count d...

Страница 7: ...NEDA1604A or 6LF22 1 piece 1 pair 1 piece 1 piece Model 72 7228 OPERATING MANUAL Inspection Open the package case and take out the Meter Carefully check the following items for missing or damaged part...

Страница 8: ...ribution level fixed installation with smaller transient overvoltages than CAT IV Use the Meter only as specified in this operating manual otherwise the protection provided by the Meter may be impaire...

Страница 9: ...ors Inspect the test leads for damaged insulation or exposed metal Check the test leads for continuity Replace damaged test leads with identical model number or electrical specifications before using...

Страница 10: ...the Meter s two input terminals When working with effective voltages over 70VDC or 33VAC RMS special care should be taken for there is danger of electric shock Use the proper terminals function and ra...

Страница 11: ...tered at will to avoid damage of the Meter and any accident Soft cloth and mild detergent should be used to clean the surface of the Meter when servicing No abrasive and solvent should be used to prev...

Страница 12: ...tional Electrical Symbols AC Alternating Current DC Direct Current AC or DC Ground Double Insulated Warning Refer to the Operating Manual Low Battery Continuity Test Diode Danger of High Voltage Confo...

Страница 13: ...to open the transformer jaws When the pressure on the lever is released the jaws will close Functional Buttons Input Terminals LCD Display Rotary Switch Transformer Jaw designed to pick up the AC and...

Страница 14: ...acklight off otherwise it will turn off automatically after 1 minute Functional Buttons The following table provides information about the operation of functional buttons Button Operation Performed MA...

Страница 15: ...tton for 2 seconds when turning on the Meter to display full icon Button Operation Performed HOLD When the Meter is at Hz V and A press Hz to measure frequency and duty cycle Hz ZERO Press ZERO to zer...

Страница 16: ...A N A N A N A N A Rotary Switch Positions V Functional Buttons Model 72 7228 OPERATING MANUAL Functional Buttons o C o F Not every functional buttons may be used on every rotary switch position The fo...

Страница 17: ...Model 72 7228 OPERATING MANUAL Figure 2 Display Symbols see figure 2 15...

Страница 18: ...ge mode in which the Meter automatically selects the range with the best resolution True RMS indicator Indicator for AC voltage or current Indicates negative reading Indicator for DC voltage The batte...

Страница 19: ...000 000 ohms Hz Hertz The unit of frequency KHz Kilohertz 1x103 or 1000 hertz MHz Meghertz 1x106 or1 000 000 hertz Volts The unit of voltage mV Millivolt 1x10 3 or 0 001 volts Amperes amps The unit o...

Страница 20: ...oid personal injury or damage to the Meter from eletric shock do not attempt to measure voltages higher than 600V AC DC although readings may be obtained Red Black Red Black Model 72 7228 OPERATING MA...

Страница 21: ...t Press SELECT to switch to AC measurement mode Press Hz button to measure frequency or duty cycle but the frequency or duty cycle readings obtained from this range are only for reference Connect the...

Страница 22: ...resistance The resistance ranges are 660 6 6k 66k 660k 6 6M and 66M To measure resistance connect the Meter as follows Insert the red test lead into the V Hz terminal and black test lead into the COM...

Страница 23: ...o obtain a more precise reading you could remove the objects being tested from the circuit when measuring When resistance measurement has been completed disconnect the connection between the test lead...

Страница 24: ...odes Use the diode test to check diodes transistors and other semiconductor devices The diode test sends a current through the semicondutor junction then measures the voltage drop across the junction...

Страница 25: ...component place the red test lead on the component s anode and place the black test lead on the component s cathode 1 2 3 Note To obtain a more precise reading you should remove the objects being tes...

Страница 26: ...the red test lead into the V Hz terminal and the black test lead into the COM terminal Set the rotary switch to and press SELECT button to select measurement mode The buzzer sounds if the resistance...

Страница 27: ...er test is higher than 100 Note When continuity testing has been completed disconnect the test leads from the circuit under test and remove the test leads from the input terminals Model 72 7228 OPERAT...

Страница 28: ...0Hz 6 6kHz 66kHz 660kHz 6 6MHz and 66MHz To measure frequency connect the Meter as follows Insert the red test lead into the V Hz terminal and the black test lead into the COM terminal Set the rotary...

Страница 29: ...asurement has been completed disconnect the test leads from the circuit under test and remove the test leads from the input terminals being measured The measured value shows on the display Model 72 72...

Страница 30: ...range is 0 1 99 9 To measure duty cycle connect the Meter as follows Insert the red test lead into the V Hz terminal and the black test lead into the COM terminal Set the rotary switch to Hz Press SE...

Страница 31: ...Note When duty cycle measurement has been completed disconnect the test leads from the circuit under test and remove the test leads from the input terminals Model 72 7228 OPERATING MANUAL 29...

Страница 32: ...physical shock as this will effect readings It is also very sensitive to heat and magnetic fields Press the lever to open the transformer jaw Center the conductor within the transformer jaw then relea...

Страница 33: ...ng While in the 66A range if the meter does not display 00 00 press ZERO to zero the meter the meter should display 0 and the ZERO button is inoperative When current measurement has been completed pre...

Страница 34: ...very sensitive to movement or physical shock as this will effect readings It is also very sensitive to heat and magnetic fields Press the lever to open the transformer jaw Center the conductor within...

Страница 35: ...ure surge current Measurement do the following Set the rotary switch to 1000A Press SELECT when the Meter displays the minimum readings The Meter then displays indicating it is ready to carry out surg...

Страница 36: ...When current measurement has been completed press the button to open the jaw and remove the conductor away from the transformer jaw of the Meter Note Model 72 7228 OPERATING MANUAL 34...

Страница 37: ...ring Sleep Mode The Meter can be activated by turning the rotary switch or pressing the button based on The Effectiveness of Functional Buttons on page 14 If the Meter is activated by pressing button...

Страница 38: ...lay OL or OL Low Battery Display Sampling 3 times per second Measurement Deviation The conductor being meaured is not placed in the center of the jaw during AC DC current measurement it will cause ext...

Страница 39: ...irements The Meter is suitable for indoor use Altitude Operating 2000m Storage 10000m Safety Compliances IEC61010 1 IEC61010 2 032 CAT II 600V CAT III 300V over voltage and double insulation standard...

Страница 40: ...perating temperature 23 5 Relative humidity 80 R H Temperature coefficient 0 1x specified accuracy 1 A DC Voltage Range 6 600V 66 00V 600 0V Resolution 1mV 10mV 100mV Accuracy 0 8 1 Overload protectio...

Страница 41: ...esponse 40Hz 400Hz Change to AC Combine AC and True RMS response method Input sine wave to adjust Non sine wave signals must be adjusted based on the following data Peak factor 1 4 2 0 add 1 0 to the...

Страница 42: ...600M 66 00M Resolution 0 1 1 10 100 1k 10k Accuracy 1 2 2 1 2 1 2 2 1 5 2 Overload protection 250VAC D Diode Test Range Resolution 1mV Accuracy 0 5V 0 8V Open circuit voltage approx 3 0V Overload prot...

Страница 43: ...und Open circuit voltage approx 1 2V Overload protection 250VAC Remark The buzzer may or may not sound when the resistance of a circuit under test is between 30 100 The buzzer will not sound when the...

Страница 44: ...Hz Resolution 0 1Hz 0 001kHz 0 01kHz 0 1kHz 0 001MHz 0 01MHz Accuracy 0 1 3 Overload protection 250VAC Remarks Input Sensitivity a as follows When a 10Hz the Meter does not respond When 10Hz a 100kHz...

Страница 45: ...r reference only Overload protection 250VAC H DC Current Range 66 00A 1000A Resolution 0 01A 1A Accuracy 1 5 12 1 5 8 Overload protection 1000A DC AC The operating temperature must be 0 40 when measur...

Страница 46: ...1 Turn off the current of tested conductor 2 Hold the Meter tight and press the lever to open the transformer jaw Center the conductor within the transformer jaws then release the Meter slowly until...

Страница 47: ...hen measuring current Remarks Change to AC Combine AC and True RMS response method Input sine wave to adjust Non sine wave signals must be adjusted based on the following data Peak factor 1 4 2 0 add...

Страница 48: ...ase A General Service Periodically wipe the case with a damp cloth and mild detergent Do not use abrasives or solvents To clean the terminals with cotton bar with detergent as dirt or moisture in the...

Страница 49: ...d lead to possible electric shock or personal injury replace the battery as soon as the battery indicator appears Make sure the transformer jaw and the tets leads are disconected from the circuit bein...

Страница 50: ...eter s front case down 3 Remove the screw from the battery compartment and separate the battery compartment from the case bottom 4 Take out the old battery and replace with a new 9V battery 6LF22 1604...

Страница 51: ...Model 72 7228 OPERATING MANUAL END This operating manual is subject to change without notice 49...

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