ET3240 Automatic 22000 Counts Benchtop Digital Multimeter with 3.5 Inch TFT Large Clear Screen High Accuracy Desktop Multimeter ET3240 is a 4 digits, 22000 counts, dual digital benchtop true-RMS multimeter. The STM32 chip and external double integral AD used by this benchtop multimeter providing accurate measurement and stable performance. 3.5 inch 320 * 480 high resolution TFT LCD screen makes a clear reading, rich display, and a fine visual effects. The benchtop multimeter is powered by electricity and provides full-function, full-range overload conservation. Fresh and simple design with excellent performance makes them a perfect choice for electricians, electronics enthusiasts, engineers and colleges and universities. Features: 4 digits, 22000 counts. Dual parameter display: display two parameters of the same input signal. Measurement rate: FAST (7 times / sec), MID (5 times / sec), SLOW (2 times / sec). Trigger mode: automatic trigger, single trigger, external trigger(optional). Range switching mode: auto / manual. 12 basic measurement functions: AC and DC voltage, AC and DC current, two-wire / four-wire resistance, period / frequency, diode, on-off test, capacitance, duty cycle. DCV basic accuracy: 0.05%. Mathematical functions: MX+B/MAX/MIN/dB/dBm/Rel/Comp Hi/Comp Low/ Statistics. Additional functions: data hold, data record, data readback. Keys can be locked. Open calibration function. Square wave output. (optional) Provide system settings, can configure the language (Chinese / English), buzzer, screen brightness, interface display style. Temperature: thermocouple: K/N/R/S/T/B/E/J/WRe325/WRe526; RTD: PT100 / PT50 / Cu100 / Cu50. Communication interface: standard: USB device. Support SCPI protocol. A wider range of applications: can be used in fire conservation, archeology, transportation, agriculture, geology, energy, smelting, electronics manufacturing and other fields. Specifications: Material: ABS Color: white Display digits: 22000 (4) Screen: 3.5 inch, 320*480, 16M colour TFT LCD Maximum measurement speed: 7 times / sec DC voltage: Range: 200mV/2V/20V/200V/1000V Accuracy: ±(0.03%+3) Resolution: 0.001mV/0.00001V/0.0001V/0.001V/0.01V AC voltage (RMS): Range: 200mV/2V/20V/200V/750V Accuracy: 20Hz~5KHz/5~30KHz/30~50KHz/50~100KHz 200mV: ±(0.3%+20)/±(0.5%+20)/±(1%+20)/±(2%+20) 2V: ±(0.3%+20)/±(0.5%+20)/±(1%+20)/±(2%+20) 20V: ±(0.3%+20)/±(0.8%+20)/±(2.5%+20)/±(5%+20) 200V: ±(0.3%+20)/±(0.8%+20) 750V: 20Hz~1KHz/1~2KHz           ±(0.5%+20)/±(0.8%+20) Resolution: 200mV: 0.001mV 2V: 0.0001V 20V: 0.001V 200V: 0.001V 750V: 0.01V DC current: Range: 200μA/2mA/20mA/200mA/2A/10A Accuracy: 200μA/2mA/20mA/200mA/2A: ±(0.08%+10) 10A: ±(0.5%+20) Resolution: 0.001μA/0.00001mA/0.0001mA/0.001mA/0.00001A/0.0001A AC current: Range: 200μA/2mA/20mA/200mA/2A/10A Accuracy: 200μA/2mA/20mA/200mA/2A: ±(0.3%+20) 10A: ±(1%+20) Resolution: 0.001μA/0.00001mA/0.0001mA/0.001mA/0.00001A/0.0001A Resistance: Range: 200Ω/2KΩ/20KΩ/200KΩ/2MΩ/20MΩ/200MΩ Accuracy: 200Ω/2KΩ/20KΩ/200KΩ/2MΩ: ±(0.05%+5) 20MΩ: ±(0.3%+5) 200MΩ: ±(5%+10) Resolution: 0.001Ω/0.00001KΩ/0.001KΩ/0.001KΩ/0.00001MΩ/0.0001MΩ/0.001MΩ Capacitance: Range: 2nF/20nF/200nF/2μF/20μF/200μF/2mF/10mF Accuracy: 2nF/20nF: ±(2%+5) 200nF/2μF/20μF: ±(1%+5) 200μF/2mF/10mF: ±(2%+5) Resolution: 0.001nF/0.01nF/0.1nF/0.001μF/0.01μF/0.1μF/0.001mF/0.01mF Frequency: Range: 20Hz/200Hz/2KHz/20KHz/200KHz/2MHz/20MHz Accuracy: ±(0.01%+10) Resolution: 0.0001Hz/0.001Hz/0.00001KHz/0.0001KHz/0.001KHz/0.00001MHz/0.0001MHz Duty cycle: Range: 5.0%~95.0% Accuracy: ±(3%+20) Resolution: 0.001 Diode: Range: 0~2V Input current is about 0.75mA Input conservation: 250Vp Conductance: Resolution: 0.001KΩ When the measured resistance is less than 30Ω, the buzzer sound; when the reading is less than 2KΩ, "-OL-" is displayed when it exceeds. Threshold resistance can be set in the range of 0 to 2KΩ. Input conservation: 250Vp Temperature: Accuracy: 0.01℃ Ambient temperature: 18~28℃ Ambient humidity: 75%RH Temperature coefficient: 0.1 * (accuracy) / ℃ Preheating time: 30 minutes Item size: 296 * 234 * 101mm / 11.7 * 9.2 * 4.0in Item weight: 2151g / 4.7lb Package size: 350 * 280 * 145mm / 13.8 * 11.0 * 5.7in Package weight: 3120g / 6.9lb Packing List: 1 * Multimeter 1 * Power Cord 1 * Pencil Cord 2 * Alligator Clip 2 * Safety Tube 1 * Compact Disc 1 * User Manual