| How long does the battery last? |
| The battery life should be over 6 months. with the unit turned on or off. Because the readout always maintains the calibration even when it is turned off, it is actually reading all the time. Turning it off only turns off the display which reduces the power consumption by 50%. There is an auto shut off feature incase you forget to turn it off. |
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What type of batteries do these readouts use? |
The WR400 series, WR41 and WR41BT Digital Protractors use a CR2032 watch battery.
The CJ4000 and CJ410 both use 2 AAA batteries. |
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| How does it read? |
| All of our readouts use what's called capacitive measuring technology. This is the exact same system that is used in almost all digital calipers that have been on the market for at least 20 years. There is a circuit board on one of the legs of the protractor that has a repeating pattern etched on it. There is a second circuit board with a similar pattern attached to the other leg. As the 2 patterns pass over each other there is an electronic signal generated that is converted to a rotation angle. |
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