Tenma 72-7228, Operating Manual

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

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

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 52: ...Model 72 7228 OPERATING MANUAL Copyright 2007 Tenma Test Equipment All rights reserved Tenma Test Equipment 405 S Pioneer Blvd Springboro Ohio 45066 www tenma com 50...