Fuel Injector Tester Analyzer EM276 with 4 Pluse Modes

This tester can diagnose injector problems, you can use it on each injector
individually to test stuck, leaking or burnt-out.
It used 12V vehicle battery as power supply.
It has 4 pulse modes and in the continuous working mode ( mode 4 ), it can help
you identify the injector good or not when you switch off the engine.
The lock mode can ensure the testing condition is same.
It can work with any fuel pressure tester together.

Operation Instructions:

Turn off the vehicle‘s engine
Connect Black / Red Clip to the Negative / Positive terminal of battery  
Connect pulse output terminal to the fuel injector
Press the "MODE SET" key to select the desired pulse mode
Press the "PULSE" key, the tester will output pulse to the injector, and then the pulse signal indicator will light as indication  


Explanations for 4 modes:

Mode 1:  the tester outputs 1 pulse, whose pulse width is about 250ms
Mode 2:  the tester outputs 50 pulse, every pulse's pulse width is about 7ms
Mode 3:  the tester outputs 100 pulse, every pulse's pulse width is about 3.5ms
Mode 4:  the tester outputs pulse continuously at the rate of 50 pulses per about 1450ms
every pulse's pulse width is about 7ms

Specification:
 Power Supply: 12V vehicle battery
 Operation Environment: 0 C - 40C, relative humidity < 80%
 Storage Environment: -10 C - 50C, relative humidity < 85%
 Size: 147x82x29mm (for main body only)
  Weight: about 165g