This device can be used to test logic chip, 74HC, 74LS, CD40, 45 / 145, driver, operational amplifier, comparator, optocoupler, diode, zener diode, light emitting diode, triode, field tube, thyristor and other types of chips.Built-in data model all kinds of chips more than 1,300 species, more than 420 kinds of transistor data models, covering most common devices within 24 feet, and can greatly reduce the maintenance workload, improve maintenance efficiency.This device is developed with 800mHa built-in lithium battery, and the low power consumption is even lower than a digital multimeter. Press the enter key can boot first boot automatically perform a self-test, self-test the battery voltage is detected and displayed on the screen after the passage of more than two seconds, when the battery voltage is below 7v replace the battery, in order to ensure measurement accuracy. If there is no alarm you can start measuring work.Native AD 10 AD, the theoretical resolution of 5v voltage is 0.0048v. Not suitable for measuring high power thyristor due to the use of battery-powered. Boot the default directory is search directory. An ordinary optocoupler optocoupler test up to a dozen parameters, a simple measurement optocoupler logic relationship has not much practical significance, the machine can test the secondary optocoupler saturation voltage.Built-in various types of chip data model more than 1,300 kinds, more than 420 kinds of transistor data model, Covers most of the common 24-pin universal devices, can significantly reduce the workload and improve work efficiency.Instructions:There are seven buttons on the panel are up, down, left, right and Enter keys, and shortcut keys O, P keys.Up and down keys used to adjust the directory and change the model number, left and right keys for moving the cursor left and right to select the item you want to change. Enter key is used to switch machine and execute test command. Open the battery cover, into the two 5 # 1.5v battery, tem you want to change. Enter key is used to switch machine and execute test command. Open the battery cover, into the two 5 # 1.5v battery, and then close the battery cover. Press Enter for more than 2 seconds to boot, boot automatically displays the current battery voltage, when the battery is too low, please replace the battery, the voltage is too low will affect the reliability of the test results and protective automatic shutdown.Power on: Press Enter key for more than 2 seconds to turn on.Shut down: 1 Press the Enter key in the OFF directory immediately shut down.2 Press Enter in any directory for more than 10 seconds to shut down.3 After 60 seconds without any operation, it will automatically shut downFast: 1 The key for the fast shutdown button (06 type)2 P button repeat self-test, reset buttonDIY Supplies:ELECTRICALItem Type:IC Chips TesterPower Supply:Lithium Battery (800mAh)Type:Acolor:BlackMaterial:plasticPackage Contents:1 x TesterOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.