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Table of Contents
Related Manuals for Tenma 72-7765A
Summary of Contents for Tenma 72-7765A
- Page 1 Palm Size Digital Multimeter Model: 72-7765A / 72-10420A / 72-7770A...
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Page 2: Important Safety Information
IMPORTANT SAFETY INFORMATION Please read these instructions carefully before use and retain for future reference. • Check the test leads, probes and case insulation before using. If you find any breakage or abnormality, or you consider the device is broken, stop using the device immediately. -
Page 3: Operating Parameters
FUNCTIONS 1. LCD display 2. Range button (72-7765A) (Press the yellow button to switch between AC and DC current, or between continuity and diode measurements, indicated by buzzer. In standby mode, press it to activate the meter and cancel auto power off function.) 3. HOLD button (72-10420A/72-7770A) (Press the yellow button, then the current... - Page 4 AC VOLTAGE Model Range Resolution Accuracy Overload Protection 72-7765A 10mV ± (1.2%+3) 250VAC 250V 100mV 200V 100mV 72-10420A ± (1.2%+10) 250V DC and AC 72-7770A 250V Notes: • Input impedance: ~ 5MΩ. • Displaying effective value of sine wave (mean value response).
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Page 5: Diode And Continuity Measurement
10A/600V fast type fuse Φ6x25mm 10mA DIODE AND CONTINUITY MEASUREMENT Range Resolution Accuracy Overload protection Displaying approximate forward voltage drop 0.1Ω 250V DC and AC Beeping if impedance <100Ω (72-7765A) 1Ω Beeping if resistance <70Ω RESISTANCE Overload Model Range Resolution Accuracy protection 400Ω 0.1Ω... -
Page 6: Square Wave Output
OPERATION Voltage measurement (See Figure 1&2) DC voltage measurement For Model 72-7765A, the testing ranges are: 400mV, 4V, 40V and 250V. For Model 72-10420A and 72-7770A, the testing ranges are: 200mV, 2000mV, 20V, 200V and 250V. To measure DC voltage, perform the following steps: •... - Page 7 Never attempt a current measurement where the voltage between either terminal and ground is greater than 60V. DC current measurement • Model 72-7765A testing range: 400μA, 4000μA, 40mA, 400mA, 4A and 10A • Model 72-7770A/72-10420A testing range: 2000μA, 20mA, 200mA and 10A To measure DC current, perform the following steps: •...
- Page 8 WARNING: To avoid damages to the meter or to the devices under test, disconnect circuit power and discharge all the high-voltage capacitors before measuring resistance. Model 72-7765A testing ranges: 400Ω, 4kΩ, 40kΩ, 400kΩ, 4MΩ and 40MΩ Model 72-10420A testing ranges: 200Ω, 2000Ω, 20kΩ, 200kΩ and 20MΩ...
- Page 9 Diode and continuity measurement (See Figure 6&7) Diode measurement Perform diode test to check diodes, transistors, and other semiconductor devices. The meter can measure the voltage drop of PN joint of diode and other semiconductors in this range. For a silicon semiconductor with normal structure, the reading of the forward voltage drop should be within 0.5~0.8V.
- Page 10 Continuity measurement To test continuity, perform the following steps: • Insert the red test probe into the VΩmA terminal and the black test probe into the COM terminal. • Turn the range selector to range. • Connect the test probes to the circuit to be measured. The buzzer beeps if the circuit resistance is less than 100Ω.
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Page 11: General Specifications
Unscrew and lift off the back cover and remove the fuse from its holder. • Replace ONLY with the fuses that match the following specifications: 400mA, 250V fast type, Φ5x20mm (72-7765A). 200mA, 250V fast type, Φ5x20mm (72-10420A/72-7770A). 10A, 600V fast type, Φ6x25mm. - Page 12 INFORMATION ON WASTE DISPOSAL FOR CONSUMERS OF ELECTRICAL & ELECTRONIC EQUIPMENT These symbols indicate that separate collection of Waste Electrical and Electronic Equipment (WEEE) or waste batteries is required. Do not dispose of these items with general household waste. Separate for the treatment, recovery and recycling of the materials used. Waste batteries can be returned to any waste battery recycling point which are provided by most battery retailers.
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