Product Overview GM328R Transistor Tester / ESR Meter / Frequency Counter / Signal Generator Detail Add function : Rotary coding switch Rotating menu Frequency meter interface Precision reference source. I. Overview 1 using the 2016 version of the latest V1.12K software, using M328 chip,, more features, in addition to the basic functions, as well as extensions. 2 micro-controller uses 8MHz external crystal, the measurement accuracy is better. 3 affect the accuracy of the relevant resistance using a thousandth of a metal film resistors, and the remaining one percent is also used metal film resistors. 4.LCD using 12864 LCD screen that can display measured data and graphics. 5 main chip dual in-line and with a socket, ideal for electronics enthusiasts upgrade or replace the chip. 6 uses 9V laminated battery. 7 All components are made ??of high quality genuine. LCD screen for low power backlit screen, the backlight current of about 2mA, so after boot time has backlighting for easy use in the dark. 8 Dimensions: 72 (W) X 85 (high) X22 (depth) mm. 9 Weight: about100grams. The Working Current: 9V voltage, stable operating current of about 20mA. A, the basic function 1 one-button operation, automatic shutdown. 2 shutdown current is only about 20nA. 3.Adopt 8MH crystal. 4 can automatically detect NPN, PNP bipolar transistors, N-channel and P-channel MOS FET, JFET, diodes, dual diode, thyristor small power unidirectional and bidirectional thyristor. 5 automatic identification pin arrangement of components. Current amplification factor and base 6 measuring bipolar transistor - emitter threshold voltage. 7 can be extremely via the base - emitter threshold voltage and high-current amplification factor identification Darlington transistors. 8 protection diodes can detect bipolar transistors and MOS transistors. 9 measuring MOS FET gate threshold voltage and gate capacitance. 10. can simultaneously measure two resistors and resistor symbol is displayed. 4-digit display with decimal value 11 on the right. Resistance symbol is displayed on both sides of the pin number. So you can measure the potentiometer. If the potentiometer wiper position will not be transferred to a certain extreme, we can distinguish between the middle and both ends of the pins. 11 resistance measurement resolution is 0.1 ohms, 50M ohms can be measured. 12 can measure capacitance. Capacitor symbol is displayed on the right display values ??can be displayed with a decimal four values. Can measure the capacitance of 30pF-100mF resolution 1pF. 13.2uF more capacitors can measure the value of the equivalent series resistance ESR. The two values ??can be displayed with a decimal, resolution 0.01 ohms. Two diodes 14 can be displayed in the correct order and a diode symbol, and gives the diode forward voltage. 15.LED is detected as a diode, a higher forward voltage. Combo of the LED is recognized as two diodes. 16. reverse breakdown voltage is less than 4.5V zener diode can be identified. 17 can measure a single diode reverse capacitance. If the connection base and collector of the bipolar transistor or the emitter of a pin, or the reverse can be measured or the collector junction capacitance of the emitter junction. 18 with a single measurement can get connections rectifier bridge. 19 Although the measurement limit capacitance of 25pF, but you can be measured by the measured capacitance with a known volume of at least 25pF capacitor in parallel, then the measure will result in parallel capacitance obtained by subtracting B. extensions (via menu selection, and the user may want to add a few components, suitable for DIY) 1 can measure 1Hz-2MHz frequency. Above 25kHz resolution of 1Hz, the low-frequency measurements using the cycle, the resolution can go to 0.001MmHz. 2 can measure DC voltages below 50V. 3 can produce a square wave signal of 1Hz-2MHz. 4 can generate a fixed frequency pulse width but variable pulse wave, short key width by 1% increments, the longer the key width by 10% increments. 5. Can be activated by the individual capacitance and ESR menu functions, ranges 2UuF-50mF, since the amplitude of the measured signal is only 300mV, it is possible to measure the road. (Translation: due to non-4-wire measurement, the measurement lead resistance may lead to large errors, particularly small ESR measurements). 6 by adding a rotary coding switch, convenient menu item selection. Package Contents 100% Brand New 1x GM328R 1X Frequency Test CABLE 3XClip Shipping Policy Payment Mathord Returns Policy About Feedback 1.Items are shipped from china.we will send out within 1 bussiness day after receive the payment. 2.We only ship to ebay confirmed address. So before bidding, please kindly verify your ebay address. 3.Shipping to USA takes 8-18 days in normal condition by E-packet with tracking number. Shipping to most other countries takes about 12-30 days via Economy Int'l Airmail. Less than $40, without tracking number,if you request tracking number,please pay $3 more and let me know. Over $40,with tracking number free.The shipping time depends on your location and local postal service,as well as the weather condition along the shipping,sometimes may take longer,.please contact us to confirm before leave feedback or open case. 4.Express shipping: DHL/FEDEX/EMS,Extra $20 --$25 will be charged for the first 500 grams for most countries. Contact us if you need this service. PayPal payment accepted only. 1. Customer satisfaction is our top goal. We believe our items are so outstanding. All products are quality checked. They are new and in good condition when shipped to our customers. We are convinced you will be happy with your Purchase. 2. If product is defective or damage upon arrival, or wrong product shipped, please contact us immediately. Returns accepted within 30 days of delivery date. 3. Please contact us first if you have any problems/questions/concerns. We will be happy to resolve any issues you may have in a cordial and friendly manner. When you satisfied with our product and services please leave us positive feedback with 5 stars,thank you very much. If a problem occurs, contact us immediately with any email request. Just contact us using the " Ask the seller a question" link on eBay,we will do our best to solve for you. On Aug-19-16 at 02:03:08 PDT, seller added the following information:On Nov-18-16 at 00:48:16 PST, seller added the following information:On Nov-18-16 at 00:51:23 PST, seller added the following information:
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