Tenma 72-7780 Manuals

1 True RMS Digital Multimeter Model: 72-7780 2 This meter is designed to meet IEC61010-1, 61010-2-032, and 61010-2-033 in Pollution Degree 2, Measurement Category (CAT II 600V, CAT III 600V) and double Insulation. • Do not operate the meter or use test leads if they appear damaged, or if the meter is not operating properly. • There are no user-serviceable parts in this product. Refer servicing to qualified personnel. • Do not apply voltage between the COM and OHM terminals, while in the resistance measuring state. • Do not measure current with the test leads inserted into the voltage or OHM terminals. • To avoid electrical shock and personal injury, do not attempt to measure voltage higher than 600V AC/DC, although the readings may be obtained. • Do not expose the instrument to direct sunlight, extreme temperature or humidity. • Before measuring current, check the fuses and turn the power to the circuit off before connecting the meter to the circuit. • Disconnect circuit power and discharge all high voltage capacitors before testing continuity. diode, resistance, capacitance or current. • Take caution when voltages are above 60V DC and 30V AC rms. • Do not use the meter around explosive gas or vapour. • When using the test leads, keep your fingers behind the finger guards. • Remove test leads from the meter before opening the meter case or battery door. • Never operate the meter with the cover removed or the battery door open. • Use only the test leads supplied or the protection may be impaired. • Probe assemblies for mains measurements shall be rated as appropriate for measurement category III according to IEC 61010-031 and shall have a voltage RATING of at least the voltage of the circuit to be measured. • Replace the batteries as soon as the low battery indicator appears on the display. • Remove dead batteries from the meter or if it is not going to be used for a long time. • Never mix old and new batteries together, or different types of batteries. • Never dispose of batteries in a fire, or attempt to recharge ordinary batteries. • Before replacing the battery, turn off the meter and disconnect all the test probes. • To prolong battery life turn off the meter after use. SAFETY INFORMATION Please read these instructions carefully before use and retain for future reference. WHAT’S INCLUDED • Digital multimeter • User manual • Cat III 600V test lead • Point type K thermocouple • Current clamp 3 SYMBOL GUIDE AC or DC Grounding Double insulated Warning Low battery Continuity Buzzer Diode Fuse Conforms to European Union directives FUNCTIONS 1. Casing 2. LCD Display 3. Function buttons x 4 4. Option buttons 5. Range selector 6. Test lead input terminals 1 2 3 4 5 6 4 r Mk Ω Hz nm Vµ AF oC oF % DC AC-8.8.8.8 MAX-MIN Auto Range NCV A H Display symbol Instruction H Data hold prompt -- Negative reading AC/DC AC/DC measurement MAX-MIN Max/Min value measurement prompt Low voltage internal battery Auto Range Uto range prompt

True RMS Digital Multimeter Model: 72‐7780 User Manual I. Overview 72‐2800 is a professional handheld true RMS multimeter with wide scope of application. It is a safe, stable and reliable measurement device for AC/DC, resistance, diode, continuity, capacitance, frequency, NCV measurement etc. II. Unpacking Inspection Open the package box and take out the device. Please check whether the following items are deficient or damaged and contact your supplier immediately if they are. • User manual‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐1pc • Test leads‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐1pair • K‐type thermocouple‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐1pc • Optional current clamp III. Safety information Safety Standards • EN 61010‐1:2010 • CAT III 600V, double insulation standard, over voltage standard, and RoHS, pollution grade II Please read and comply with the safety information carefully, or the protection provided by the device may be impaired. 1. Do not use the device if the rear cover is not covered up or it will pose a shock hazard 2. Do not use the device if the device or test leads appear damaged or if you suspect that the device is not operating properly. Pay particular attention to the insulation layers. 3. To avoid false reading, replace the battery when the battery indicator appears. 4. Functional dial should be switched to proper position. 5. Never input voltage and current exceeding the value listed on the device. 6. Do not switch the functional dial during measuring. 7. After each measure, disconnect the test leads with the circuit. For measuring current, switch off the power supply before test leads disconnection, especially important for measuring large current. 8. Use caution to measure voltage >DC 60V or AC 30Vrms. 9. Do not use or store the device in high temperature, high humidity, flammable, explosive or strong magnetic field environments. 10. Do not change the internal circuit of the device in order to avoid the damage to the device and users. 11. Use damp cloth to clean the case; do not use detergent containing solvents or abradants. IV. Symbols Low battery Buzzer indicator Diode AC/DC Warning Grounding Current clamp Double insulation Comply with European Union Directives V. General specifications 1) Max voltage between input terminals and earth grounding: See Technical Specifications 2) Fuse Type: 10A Jack: F 10A H 600V Fuse (Φ6x25) mm mA/μA Jack: F 600mA H 600V Fuse (Φ6x32) mm 3) Max Display Value: Capacitance measurement: 9999 Frequency measurement: 9999 Other measurement: 6000 Duty Ratio：1~99.9% Diode: 3.2V Others: 1) Range: Auto/Manual 2) Polarity: Auto 3) Display updates 2~3 times for every second. Overrange Indicator: “OL” 4) Operating temperature: 0˚C~40˚C (32˚F~104˚F) Storage temperature: ‐10 ˚C~50 ˚C (14 ˚F~122 ˚F) Relative humidity: ≤75% at 0 ˚C~30 ˚C; ≤50% at 30 ˚C~40 ˚C 5) Operating altitude: 0~2000m 6) Battery type: AA R6P 1.5V×2 7) Low power indicator: 8) Dimension: 175mm×80mm×48.5mm 9) Weight: 350g (batteries included) 10) Electromagnetic compatibility:   RF≤1V/m, overall accuracy=specified accuracy+5% of range.   RF>1V/m, no specified calculation. VI. Structure (see figure 1) 1/ Protective case 2/Display screen 3/4/7 Functional buttons 5/Functional dial 6/ Input jacks VII. Display Symbol Indication Data hold ━ Negative value AC/DC AC or DC measurement MAX/MIN Maximum or minimum reading Low power Auto Range Auto range selection Diode measurement Continuity measurement Relative measurement Ω、kΩ、MΩ          Unit of resistance Hz、kHz、MHz Unit of frequency % Unit of duty ratio mV、V Unit of voltage μA、mA、A Unit of current nF、μF、mF Unit of capacitance ˚C Celsius degree ˚F Fahrenheit degree NCV Non‐contact voltage Auto shutdown Current clamp VIII. Functional dial and buttons Position Note V 、V 、mV AC/DC voltage Ω Resistance Diode Continuity Capacitance Hz Frequency % Duty ratio ˚C/˚F Temperature μA     mA     A AC/DC current 60A AC/DC current clamp