Model 72-1015 OPERATING MANUAL
Contents
1. _ 48 General Service 48 B Replacing the Fuses OG C Replacing the Battery r 51 RS232C Serial Port a ao a ro 52 System Requirements for Installing 08 72 1015 Program an 52 RS232C Serial Port ee 53 A Connecting between the Meter did computer E 52 B RS232C Port Cable 53 Setting of RS232C Serial Ports 8 Model 72 1015 OPERATING MANUAL Overview This Operating Manual covers information on safety and cautions Please read the relevant information carefully and strictly observe all warnings A Warning To avoid electric shock or personal injury read the Safety Information and Rules for Safety Operation carefully before using the Meter Digital Bench Type True RMS Multimeter Model 72 1015 hereafter referred to as the Meter has auto and manual range options with maximum reading of 5999 counts and 3 5 6 digits which has a unique outlook design In addition to all the conventional features including DC AC voltage current resistance diode continuity test capacitance temperature C and transistor max min there is a data hold low battery display sleep mode RS232C serial port for easy connection with computer to realize macro recording monitoring and capture of transient dyn2. F Continuity Test Model 72 1015 OPERATING MANUAL Range Resolution Overload Protection Remarks i 10 250V rms Open circuit voltage approximate 1 2V When circuit disconnected with resistance value gt buzzer does beep When circuit is in good connection with resistance value 700 buzzer beeps continuously G Diode Testst Range Resolution Overload Protection Remarks Fr 10 250V rms Open circuit voltage approximate 2 7V Working current approximate 1mA 44 Model 72 1015 OPERATING MANUAL H Capacitance Range Resolution Accuracy Overload Protection 6nF 0 001nF 2 5 5 60nF 0 01nF 600nF 0 1nF Ws uns 6uF 0 001uF 2 5 60uF 0 01uF 600uF 0 1uF 3 4 0 001mF 5 4 Remarks At 6nF 60nF and 600nF Range reading must subtract the test lead open circuit capacitance value 45 Model 72 1015 OPERATING MANUAL Frequency Range Resolution Accuracy Overload Protection 6kHz 0 001kHz 60kHz 0 01kHz 600kHz 0 1kHz 0 1 3 250V rms 6MHz 0 001MHz 60MHz 0 01MHz Remarks Input scope a DC electric level is zero When 10Hz 1MHz 150mV lt a 30V rms When gt 1MHz 10MHz 300mV lt a lt 30V rms When gt 10MHz 50MHz 600mV lt a 30V rms When 50MHz Unspecified
3. 33 The POWER Button J 33 The SELECT Button E lt E 2 m 33 Turning the Display Backlight 25 2 M 34 The RANGE Button lt 2 E B 34 The MAX MIN Button z T a 35 AC AC DC 35 Model 72 1015 OPERATING MANUAL TITLE PAGE POWER INPUT Switch E E 2 35 Sleep Mode m e 36 S292 Button ecl et e uc 36 General Specifications 37 Accuracy Specifications e e 38 A DC Voltage A 38 AC Voltage gt Si an 39 C DC Current TX ER Mc 5 41 D AC Current 42 E Resistance ge 224 422 22 0522 216 pur 43 F Continuity Test e _ _ _ _ __ _ _ 44 G Diode Test 5 E z 44 Capacitance MMMM 45 Frequency iii 46 J Temperature 47 K Transistor m e _ _ _ 47 Maintenance vr er
4. Model 72 1015 OPERATING MANUAL TENMA Model 72 1015 OPERATING MANUAL TABLE OF CONTENTS TITLE PAGE Overview si oo 3 Inspection 4 Safety Information s n amp ee eee 5 Rules For Safe Operation ee ee 6 International Electrical Symbols _ _ _ _ _ __ ___ ___ 8 The Meter Structure _ _ _ __ ___ __ ___ ___________g Rotary Switch iii 10 Functional Buttons _ _ _ _ _ ___ ___ __ 11 Display Symbols 2 25 5 12 Measurement Operation A A DC or AC Voltage Measurement ee R ne oi n 16 DC or AC Current Measurement C C 65 18 C Measuring Resistance 20 D Testing Continuity KO 2 02 E Testing Diodes _ _ _ _ __ __ ___ ___ __ _________ 94 F Capacitance Measurement 26 G Frequency Measurement 28 H Temperature Measurement 30 l Measuring Transistor 82 Operation of Hold Mode
5. indicates power on while O indicates power off The SELECT Button Some positions of the rotary selector have more than one function This button is used for selecting the second function 33 Model 72 1015 OPERATING MANUAL Turning on the Display Backlight The RANGE Button Press RANGE to enter the manual ranging mode A Warning Press and hold RANGE for over 1 second to return In order to avoid the hazard arising from mistaken to autoranging readings in low light situations please use Display Backlight function Press LIGHT button to turn the Display Backlight on Press LIGHT button again to turn the Display Backlight off When using the AC power the Display Backlight always stays on 34 Model 72 1015 OPERATING MANUAL The MAX MIN Button MAX MIN recording mode captures and stores the maximum and minimum input value detected To use the MAX MIN mode as follows Press MAX MIN to display the highest reading is shown on display Press MAX MIN again to display the lowest reading MIN is shown on display Press and hold MAX MIN for over 1 second to exit the MAX MIN mode AC AC DC Button It is used to select measuring AC or AC DC when measuring AC Press it only at the AC voltage or current measuring mode which is at the rotary switch position VN mVT WAN MAW or DC will be displayed when it is pressed under DC measurement mode POWER INPU
6. 1 000 000 ohms HA A amps The unit of current mA Milliamp 1 x 10 or 0 001 amperes Microamp 1x 10 or 0 000001 amperes 13 Model 72 1015 OPERATING MANUAL Number Symbol Meaning 9 V mV V Volts The unit of voltage mV Millivolt 1 x 10 or 0 001 volts F mF F Farad The unit of capacitance pF nF mF Millifarad 1 x 10 or 0 001 farads uF Microfarad 1x10 or 0 000001 farads nF Nanofarad 1 x 10 or 0 000000001 farads F Centigrade temperature Temperature in Fahrenheit Hz kHz Hz Hertz The unit of frequency in cycles second MHz kHz Kilohertz 1 x 103 or 1 000 hertz MHz Megahertz 1 x 106 or 1 000 000 hertz p Unit of transistor 10 Test of diode 11 The continuity buzzer is on 14 Model 72 1015 OPERATING MANUAL Number Symbol Meaning 12 AutoRange Indicator of Auto or manual range Manual 13 MAX MIN Display of maximum or minimum value 14 Data output is in progress 15 LA The battery is low A 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 16 hFE Transistor test is on 15 Model 72 1015 OPERATING MANUAL Measurement Operation A DC or AC Voltage Measurement See figure 3 A Warning To avoid
7. 2 Input Terminal 200mA 250V fast type 65x20mm only apply on hFE functions Fused Protection for Input Terminal 500mA 125V fast type 65x20mm Fused Protection for 10A Input Terminal 10A 250V fast type 5 20 Fused Protection for AC125V Terminal 500 125V fast type 5 20 At AC125V power without fuse protection Maximum Display Digital 5999 Measurement Speed Updates 2 3 times second Range Manual or auto ranging Polarity Display Auto Overloading Display OL Temperature Operating 0 C to 40 C 32 F to 104 F Storage 10 C to 50 C 14 F to 122 F Relative Humidity lt 75 0 C 30 C below lt 50 30 40 C Altitude Operating 2000 m Storage 10000 Below 1V m electrostatic discharge Accuracy specified accuracy 5 of the range Over 1V m electrostatic discharge Without specified accuracy Power AC110V 60Hz or 6 pieces of 1 5V battery R14 Low Battery Display ra Dimensions HxWxL 4 13 x 9 45 x 12 21 Weight Approximate 4 4 Ibs accessories excluded Safety Compliances 61010 CAT 1000V CAT II 600V overvoltage and double insulation standard Certifications C UL pending 37 Model 72 1015 OPERATING MANUAL Accuracy Specifications Accuracy a reading b digits guarantee for 1 year Operating temperature 23 C 5 C Relative humidity not more than 75
8. 46 TENMA Model 72 1015 OPERATING MANUAL J Temperature Range Accuracy Overload Protection 40 C 0 C 8 5 1E gt 0 C 400 C 1 7 gt 400 C 1000 C 2 10 250V rms 40 C 32 C 8 5 RS gt 32 F 752 F 1 5 5 gt 752 F 1832 F 2 5 5 Remarks The included point contact temperature probe can only be used to measure under 230 C temperature For any measurement higher than that the rod type temperature probe must be used instead K Transistor Fuse 200mA 250V fast type 5x20mm Vce 2 2V bo 10 Fuse 500mA 125V fast type 5x20mm 10008 hFE 1 47 Maintenance This section provides basic maintenance information including battery and fuse replacement instruction A 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 To avoid electrical shock or damage to the Meter do you get water inside the case 48 Model 72 1015 OPERATING MANUAL 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 terminals can affect readings Turn off the power of the Meter when it is not in use Take out the battery when it is using for a long time Do not use or sto
9. Back Faceplate IBM PC or equivalent computer with 80486 or aE B Te UTER higher processor and 600 x 800 pixel or better monitor Microsoft Windows 95 above At least 8MB of RAM e At least 8MB free space in hard drive Can access to a local or a network CD ROM A free serial port A mouse or other pointing device supported by i Windows i Figure 14 52 TENMA Model 72 1015 OPERATING MANUAL B RS232C Port Cable C Setting of RS232C Serial Ports The Meter Computer Default of RS232C serial port for communication is set as D sub D sub D sub Baud Rate 19200 9 Pin Male 9 Pin Female 25 Pin Female Start bit 1 1 DCD 1 DCD 8 DCD Stop bit 1 2 RXD 3 TXD 2 TXD Data bits 7 3 TXD 2 RXD 3 RXD Parity Odd 4 DTR 4 DTR 20 DTR 5 SG 5 SG 7 SG 6 DSR 6 DSR 6 DSR 7 RTS 7 RTS 4 RTS 8 CTS 8 CTS 5 CTS 9 RI 9 22 RI END 53 TENMA Model 72 1015 OPERATING MANUAL Copyright 2005 Tenma Test Equipment rights reserved Tenma Test Equipment 405 S Pioneer Blvd Springboro Ohio 45066 www tenma com 54
10. RH Temperature coefficient 0 1 x specified accuracy 1 C A DC Voltage Range Resolution Accuracy Overload Protection 600mV 0 1mV 0 6 2 6V 0 001V 1000V 60V 0 01V 0 3 2 600V 0 1V 1000V 1V 0 5 3 Remarks Input Impedance At 600mV range Around gt 3000MQ Ai all other ranges Around 10MQ 38 Model 72 1015 OPERATING MANUAL B AC Voltage Range Resolution Accuracy Overload Protection 40Hz 50kHz 0 6 5 en gt 50 2 100 2 1 5 40Hz 1kHz 0 6 5 6V gt 1 2 10 2 1 0 5 10kHz 100kHz 3 5 z 0 69 40Hz 1kHz 0 6 5 1000V Ban gt 1 2 10 2 1 5 5 10kHz 20kHz 3 5 20kHz 100kHz 8 5 40Hz 1kHz 0 6 5 600V 1kHz 10kHz 3 5 5 40Hz 1kHz 1 2 3 1000V gt 1kHz 3kHz 3 3 39 Model 72 1015 OPERATING MANUAL Remarks Input Impedance At 600mV range Around gt 3000MQ At all other ranges Around 10MQ Displays gt True RMS applicable to the range of 10 95 gt At 1000V range peak factor 1 5 All other ranges AC peak factor 3 0 gt Input short circuit has around less than 30 remaining digits it will not affect accuracy gt AC DC measurement accuracy range s accuracy 1 40 Model 72 1015 OPERATING MANUAL DC Current Range Resolution Accuracy Overload Protection 600HA
11. personal injury or damage to the Meter from electric shock please do not attempt to measure voltages higher than 1000V although readings may be obtained To measure DC AC voltage connect the Meter as follows 1 Insert the red test lead into the V terminal and the black test lead into the COM terminal If the measured value is less than 600mvV insert the red test lead into mV terminal instead and press RANGE button to select manual range 600 0mV mode the LCD displays MANUAL and mV 2 Set the rotary switch to V amp press SELECT button to select DC or AC measurement mode Figure 3 3 Connect the test leads across with the object being measured The measured value shows on the display AC measurement displays True RMS value 16 Model 72 1015 OPERATING MANUAL 4 Press AC AC DC button to measure AC DC voltage s true RMS Note In each range the Meter has an input impedance of 10 except 600mV range has 3000MQ This loading effect can cause measurement errors in high impedance circuits If the circuit impedance is less than or equal to 10 the error is negligible 0 1 or less When DC AC voltage measurement has been completed disconnect the connection between the test leads and the circuit under test and remove the test leads from the input terminals of the Meter 17 DC or AC Current Measurement See figure 4 A Warning Before connecting the meter
12. type 65x20 mm pA mA Fuse 3 500mA 125V fast type 65x20 mm Fuse 4 200mA 250V fast type 65x20 mm hFE Replacement of the fuses is seldom required Burning of a fuse always results from improper operation 50 TENMA Model 72 1015 OPERATING MANUAL C Replacing the Battery see figure 13 A 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 when using battery to power on the Meter To replace the battery 1 Press the POWER to turn the Meter off and remove all connections from the terminals 2 Use a coin to open the accessories compartment at the top of the front case 3 Use a coin to open the battery compartment inside the accessories compartment located at the top of he front case 4 Remove all the batteries from the battery compartment 5 Replace the battery with new 6pcs of 1 5V battery R14 Figure 13 6 Rejoin the battery compartment and also the accessories compartment located at the top of the front case 51 Model 72 1015 OPERATING MANUAL RS232C Serial Port RS232C Serial Port System Requirements for Installing the 72 1015 A Connecting between the Meter and computer Interface Program see figure 14 To use 72 1015 Interface Program you need the following hardware and software 8 72 1015
13. 1 6000 1 0 5 3 Fuse 500mA 125 60mA 0 01 fast type 5 20 600mA 0 1mA 0 8 3 Fuse 10A 250V 10A 10mA 1 2 3 fast hoap 5 Remarks At lt 5 range Continuous measurement is allowed At gt 5A range For continuous measurement lt 10 seconds and interval not less than 15 minutes 41 AC Current Model 72 1015 OPERATING MANUAL Range Resolution Accuracy Overload Protection GOOLA 1 40Hz 10kHz 1 0 5 6000 Fuse 500mA 125 fast 10kHz 15kHz 2 5 60mA type 85x20mm 40 2 10 2 1 5 600 0 1mA 10kHz 15kHz 3 5 Fuse 10A 250V 10A 10mA 40Hz 5kHz 2 0 6 fast type 5x20mm Remarks At lt 5Arange Continuous measurement is allowed At gt 5A range For continuous measurement 10 seconds and interval not less than 15 minutes Displays gt True RMS applicable to the range of 10 95 gt AC peak factor 3 0 gt Input short circuit has around less than 30 remaining digits it will not affect accuracy gt AC DC measurement accuracy range s accuracy 1 42 Model 72 1015 OPERATING MANUAL E Resistance TENMA Range Resolution Accuracy Overload Protection 0 8 3 test lead short 600Q 0 10 ME circuit resistance value 6kQ 60kQ 0 01kQ 0 5 2 600 0 1kQ 6MQ 0 001 0 0 8 2 60MO 0 01MQ 1 2 3 43
14. NMA Functional Buttons Below table indicated for information about the functional button operations Button Operation Performed POWER Turn the power on and off LIGHT Turn the display backlight on and off SELECT Switches between AC and DC measurement Switches between continuity diode and resistance measurements Switches between frequency and Fahrenheit temperature HOLD Press HOLD to enter and exit the Hold mode in any mode RANGE Press RANGE to switch between manual and auto ranging RS232C Turn on or off the serial port interface without changing the original setting MAX MIN Starts recording of maximum and minimum values Steps the display through high MAX and low MIN AC DC To select or AC DC measurement 11 Model 72 1015 OPERATING MANUAL Display Symbols see figure 2 5 6 7 14 15 2 16 8 13 34 9 Figure 2 12 Model 72 1015 OPERATING MANUAL Number Symbol Meaning 1 True RMS Indicator for true rms value 2 Data hold is active 3 Sleep Mode feature is enabled 4 Indicates negative reading 5 AC Indicator for AC voltage or current 6 DC Indicator for DC voltage or current 7 AC DC Indicator for AC DC measurement 8 OL The input value is too large for the selected range 9 O KO MO Ohm The unit of resistance kilohm 1 x 10 or 1000 ohms Megaohm 1x10 or
15. T Switch It is used to select AC 120V 60Hz or DC 6pcs of 1 5V battery R14 to power on the Meter It is located at the rear of the Meter 35 Sleep Mode The meter will automatically enter the sleep mode after approximately 10 minutes of inactivity to preserve battery life The last value will be stored The Meter can be activated by pressing the POWER button off and then on or pressing the HOLD button it will display the last measurement value before it entered sleep mode and under the HOLD mode Turning the rotary switch can also activate the Meter However it will start from the switch selected function and it will not display the last measurement value before it entered sleep mode To disable the Sleep Mode function press MAX MIN RANGE or RS232 button while turning on the Meter the symbol disappears 36 Model 72 1015 OPERATING MANUAL RS232 Button Press RS232 button to enter or exit data output mode In RS232C serial port data output mode the Hold and Max Min mode cannot output to the computer the computer will only display the present measuring value In RS232C serial port data output mode Sleep Mode function will be disabled amp symbol disappears hFE and f cannot output to the computer Model 72 1015 OPERATING MANUAL General Specifications Maximum Voltage between any Terminals and Grounding Refer to different range input protection voltage Fused Protection for
16. amic data displaying change of waveform during the measurement providing data and evidence to engineering technicians for scientific research Model 72 1015 OPERATING MANUAL Inspection Open the package case and take out the Meter Check the following items carefully for missing or damaged parts Description Qty 1 Operating Manual 1 piece 2 Test Lead 1 pair 3 Alligator Clip 1 pair 4 Multi Purpose Socket 1 piece 5 Point Contact Temperature Probe to be used under 230 C temperature measurement 1 piece 6 Power Cord 1 piece 7 RS232C Interface Cable 1 piece 8 Installation guide and computer interface software CD ROM 1 piece In the event that items are found missing or damaged contact your Tenma dealer immediately Model 72 1015 OPERATING MANUAL Safety Information This Meter complies with the standards 61010 in pollution degree 2 overvoltage category CAT 1000V CAT II 600V and double insulation CAT III Distribution level fixed installation with smaller transient overvoltages than CAT IV CAT IV Primary supply level overhead lines cable Systems etc Use the Meter only as specified in this operating manual otherwise the protection provided by the Meter may be impaired In this manual a Warning identifies conditions and actions that pose hazards to the user or may damage the Meter or the equipment under test A Note identifies the in
17. and the circuit under test and remove the temperature probe from the input terminals of the multi purpose socket and remove the multi purpose socket from the input terminals of the Meter 31 l Measuring Transistor see figure 11 To measure transistor connect the Meter as follows 1 Insert the multi purpose socket into the AmA and Hz input terminal 2 Set the rotary switch to hFE 3 Insert the NPN or PNP type transistor to be tested into the corresponding input terminals of the multi purpose socket 4 The measured nearest transistor value shows on Model 72 1015 OPERATING MANUAL the display Note When transistor measeurement has been completed remove the tested transistor from the multi purpose PNP Aa NPN socket and remove the multi purpose scoket from p the input terminal Figure 11 32 Model 72 1015 OPERATING MANUAL Operation of Hold Mode A Warning To avoid possibility of electric shock do not use Hold mode to determine if circuits are without power The Hold mode will not capture unstable or noisy readings The Hold mode is applicable to all measurement functions Press HOLD to enter Hold mode Press HOLD again to exit Hold mode and the Meter displays the present measurement value In Hold mode il is displayed The POWER Button This is a self lock switch used to turn on or off the power Meter It is located at the rear of the Meter
18. cuit voltage is approximately 1 2V When continuity testing has been completed disconnect the connection between the test leads and the circuit under test and remove the test leads from the input terminals of the Meter TENMA 23 E Testing Diodes See figure 7 A Warning To avoid possible damage to the Meter and to the device under test disconnect circuit power and discharge all high voltage capacitors before testing diodes To avoid personal injury please do not attempt to input voltages higher than 60V DC or 30V AC Model 72 1015 OPERATING MANUAL Use the diode test to check diodes transistors and other semiconductor devices The diode test sends a current through the semiconductor junction and then measures the voltage drop across the junction A good silicon junction drops between 0 5V and 0 8V Figure 7 24 Model 72 1015 OPERATING MANUAL To test a diode out of a circuit connect the Meter as follows 1 2 Insert the red test lead into terminal and the black test lead into the COM terminal Set the rotary switch to Q and press SELECT button to select measurement mode 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 The measured value shows on the display Note Connect the test leads to the proper terminals as said above to avoid e
19. formation that user should pay special attention to International electrical symbols used on the Meter and in this Operating Manual are explained on page 8 TENMA Rules For Safe Operation A 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 Do not use the Meter if it is damaged or the case or part of the case is removed Look for cracks or missing plastic Pay attention to the insulation around the connectors 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 the Meter Do not apply more than the rated voltage as marked on the Meter between the terminals or between any terminal and ground Prior to measurement ensure the rotary selector switch is in the proper position To prevent potential damage to the meter do not change range or mode during measurement Model 72 1015 OPERATING MANUAL When the Meter working at an effective voltage over 60V DC or 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 If the value to be measured is unknown use the maximum measurement position and reduce the range step by step until a sat
20. in series with the circuit under test be sure power to the circuit is off to avoid the possibility of arcing If the fuse burns out during measurement the Meter may be damaged and there is risk of personal injury to the operator Use proper terminals function and range for the measurement When the test leads are connected to the current terminals do not parallel them across any circuit Model 72 1015 OPERATING MANUAL To measure current do the following 1 Insert the red test lead into the pA mA terminal and the black test lead into the COM terminal 2 Set the rotary switch to an appropriate measurement position in HAS mMA or press SELECT button to select AC or DC measurement mode 3 Connect the test leads in series with the object being Figure 4 measured The measured value shows on the display AC measurement displays True RMS value 4 Press AC AC DC button to measure AC DC current s true RMS 18 Model 72 1015 OPERATING MANUAL Note If the value of current to be measured is unknown use the maximum measurement position and reduce the range step by step until a satisfactory reading is obtained For safety sake each measurement time of high current gt 5A should be less than 10 seconds and the interval time between 2 measurements should be greater than 15 minutes When current measurement is complete disconnect the test leads from the circuit under test Disconnect the test leads from the inp
21. isfactory reading is obtained Do not use or store the Meter in an environment of high temperature humidity explosive flammable gas or strong magnetic field Do not use the meter if allowed to get wet Even after complete drying incorrect readings could occur causing a potentially hazardous condition When using the test leads keep your fingers behind the finger guards Disconnect circuit power and discharge all high voltage capacitors before testing resistance continuity diodes current or capacitance Before measuring current check the Meter s fuses and turn off power to the circuit before connecting the Meter to the circuit Model 72 1015 OPERATING MANUAL Replace the battery as soon as the battery indicator C appears With a low battery the Meter might produce false readings that can lead to electric shock and personal injury Remove test leads temperature probe RS232C interface cable and alligator clip from the Meter and turn the Meter power off before opening the Meter case 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 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 prevent the surface of the Meter from corrosion damage and accident The Meter is
22. lead to carrying out measurement The LCD displays OL indicating open circuit for the tested resistor or the resistor value is higher than the maximum range of the Meter When resistance measurement has been completed disconnect the connection between the test leads and the circuit under test and remove the test leads from the input terminals if the meter 21 D Testing Continuity See figure 6 A Warning To avoid damage to the Meter or to the devices under test disconnect circuit power and discharge all the high voltage capacitors before testing for continuity To avoid personal injury please do not attempt to input voltages higher than 60 DC or 30V To test for continuity connect the Meter as below 1 Insert the red test lead into the terminal and the black test lead into the COM terminal 2 Set the rotary switch to Q gt and press SELECT button to select measurement mode 3 Connect the test lead across with the object being measured The buzzer sounds if the resistance of a circuit under test is lt 700 the circuit is in good condition The buzzer does not sound if the resistance of a circuit under test is gt 70Q the circuit is broken 4 The measured value shows on the display and the unit is 22 Model 72 1015 OPERATING MANUAL Figure 6 Model 72 1015 OPERATING MANUAL Note In continuity mode the resistance range is 6000 and the open cir
23. om the circuit under test and remove from the input terminals of the meter TENMA 29 Temperature Measurement see figure 10 To measure temperature connect the Meter as follows 1 Set the rotary switch to C to measure degree celsius temperature or Hz F and press SELECT button to select F measurement mode to measure Fahrenheit Insert the multi purpose socket into the corresponding Hz and COM terminal Insert the temperature probe to the corresponding input terminal of the multi purpose socket Take care to ensure that proper polarity is observed when connecting to this socket Place the temperature probe to the object being measured The measured value shows on the display after few seconds 30 Model 72 1015 OPERATING MANUAL Figure 10 Model 72 1015 OPERATING MANUAL Note The testing environment must between 18 C to 28 C to ensure accuracy especially when measuring low temperature Different reading may be obtained when testing room environment under short or open circuit situation then short circuited reading shall be considered as the correct reading The included point contact temperature probe can only be used under 230 C For any measurement higher than that the rod type temperature probe must be used instead TENMA When temperature measurement has been completed disconnect the connection between the temperature probe multi purpose socket
24. re the Meter in a place of humidity high temperature explosive inflammable and strong magnetic field Model 72 1015 OPERATING MANUAL B Replacing the Fuses see figure 12 A 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 To replace the Meter s fuse 1 Press the POWER to turn the Meter off disconnect the power cord and remove all connections from the terminals 2 Fuse 1 Remove the screws from the power socket at the rear of the Meter Remove the fuse by gently prying end loose then take out the fuse from its bracket Then install the replacement fuse Fuse 2 and 3 Use coin to open the accessories compartment at the top of the front cover then you will see a fuse compartment Open the fuse compartment to replace fuse 2 and 3 Remove the Figure 12 fuse by gently prying one end loose then take out the fuse from its bracket Then install the replacement fuse 49 Model 72 1015 OPERATING MANUAL Fuse 4 It is located at the PCB Remove the fuse by gently prying one end loose then take out the fuse from its bracket Then install the replacement fuse 3 Install ONLY replacement fuses with the identical type and specification as follows and make sure the fuse is fixed firmly in the bracket Fuse 1 500mA 125V fast type 65x20mm AC125V Fuse 2 10A 250V fast
25. rror display The LCD will display OL indicating diode being tested is open or polarity is reversed The unit of diode is Volt V displaying the forward voltage drop readings Open circuit voltage is around 2 7 V When diode testing is completed disconnect the test leads from the device under test and remove the test leads from the input terminals of the meter 25 F Capacitance Measurement See figure 8 A Warning To avoid damage to the Meter or to the equipment under test disconnect circuit power and discharge all high voltage capacitors before measuring capacitance Use the DC Voltage function to confirm that the capacitor is discharged Model 72 1015 OPERATING MANUAL To measure capacitance connect the Meter as follows 1 Insert the red test lead into the 2 terminal and the black test lead into the COM terminal 2 Set the rotary switch to 3 Connect the test leads across with the object being measured The measured value shows on the display Figure 8 26 Model 72 1015 OPERATING MANUAL Note When capacitance measurement has been The Meter displays a fixed value which is the completed disconnect the test leads from the device distributed capacitor s value of the inside Meter To under test and remove the leads from the input ensure accuracy it is necessary to subtract this value terminals of the meter from the measured value when mea
26. suitable for indoor use only TENMA Turn the Meter power off when it is not in use Remove batteries from meter if use of battery power is not anticipated for long periods of time Routinely check installed batteries for leaking Remove immediately if evidence of leaks exist TENMA Model 72 1015 OPERATING MANUAL International Electrical Symbols AC or DC Ground B Double Insulated Warning Refer to the Operating Manual Low Battery en Continuity Test te Diode Ae Capacitance Test Fuse Conforms to Standards of European Union Model 72 1015 OPERATING MANUAL The Meter Structure see figure 1 Figure 1 1 LCD Display 2 Rotary Switch 3 Input Terminals 4 Functional Buttons Rotary Switch Below table indicated for information about the rotary switch positions Rotary Switch Position Function VN AC and DC voltage measurement a PEO a Continuity test Diode test Resistance measurement 4 Capacitance test Hz Hz Frequency measurement F E Temperature in Fahrenheit C Temperature in celsius hFE Transistor test BAR AC or DC current measurement range from 0 1uA to 5999uA MAT AC or DC current measurement range from 0 01mA to 599 9mA AC or DC current measurement range from 0 01A to 10 00A 10 Model 72 1015 OPERATING MANUAL Model 72 1015 OPERATING MANUAL TE
27. suring small capacitor Multi purpose socket can be used instead of test leads Insert the capacitor being tested into the corresponding input terminal of the multi purpose socket This socket will provide a more accurate reading when measuring small capacitor values When measuring capacitance values larger than 600uF it is normal for the meter to require some time to stabilize The LCD displays OL indicating the tested capacitor is shorted or it exceeds the maximum range 27 G Frequency Measurement see figure 9 A Warning To avoid the risk of personal injury do not attempt to measure frequency with voltage higher than 30V RMS Model 72 1015 OPERATING MANUAL To measure frequency connect the Meter as follows 1 Insert the red test lead into the Hz terminal and the black test lead into the COM terminal 2 Set the rotary switch to Hz F and press SELECT button to select Hz measurement mode 3 Connect the test leads across with the object being measured The measured value shows on the display Figure 9 28 Model 72 1015 OPERATING MANUAL Note When making frequency measurements the measured signal a must fall within the following voltage level When 10Hz 1MHz 150mV lt aS 30V rms When gt 1MHz 10MHz 300mV lt a 30V rms When 10MHz 50MHz 600mV lt a 30V rms When 50MHz Unspecified When frequency measurement is complete disconnect the test leads fr
28. ut terminals on the meter 19 Measuring Resistance see figure 5 A 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 avoid possible injury please do not attempt to input voltages higher than 60V DC or 30V AC Model 72 1015 OPERATING MANUAL To measure resistance connect the Meter as follows 1 Insert the red test lead into the terminal and the black test lead into the COM terminal 2 Set the rotary switch to 1 press SELECT button to select measurement mode Connect the test leads across with the object being measured The measured value shows on the display Figure 5 20 Model 72 1015 OPERATING MANUAL Note When measuring low resistances the test leads and internal wiring will add approximately 0 20 0 50 of error To obtain accurate readings in low resistance short circuit the test lead beforehand and record the reading obtained call this reading as X Then use the equation measured resistance value Y X accurate readings of resistance If reading with shorted test leads is not lt 0 5Q check for loose test leads or possible incorrect function selection When measuring high resistance gt 1 it is normal to take several seconds to obtain a stable reading In order to obtain stable reading choose shorter test
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