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CED M2 Shooting Chronograph CED M2 Shooting Chronograph
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CED M2 Chronograph
CED M2 Chronograph

Q: Why do I keep getting an E1 or E0 reading?

A: The E1 error code is an indication that the rear or stop sensor did not register, either the sensor is bad or is not getting the proper amount of light.  In the case of E0, it refers to the start (front) sensor. If using the standard sky screens, it is mandatory that both sensors are getting an equal balanced amount of sunlight. If you determine that the chronograph has the proper amount of sunlight, you can swap the sensors, making the start senor the stop sensor and the stop sensor the start senor. Keep in mind you will also have to swap the AUX jacks in the main unit, so they match the corresponding sensors. Once swapped and you shoot through the unit and you now get an E0 error, it indicates that you have a defective sensor.