KeCheng KC-109A - Addition (W;O using M memory); Addition (using M memory)

REMARK:
A. The measured object must be normatively hard surface and not be blocked by any barriers;
B. Select a smooth hard surface with big area to measure for precise result;
C. If the measured surface is too small and irregular or with soft surface, chipboard can be used on the
surface of the measured object;
D. The tool cannot measure through glasses;
E. The tool should be over 2 feet (60cm) away from the measured object when measuring;
F. To make sure accurate measurement, you should operate when temperature of the unit is same with
temperature of the circumstance.
G. The distance measurement should be counted from the end of the tool.
2、Addition (W/O using M memory)
● Press READ key for measurement and the measured value is displayed on upper portion of the
screen;
● Press +/= key to enter the addition mode, and the “+” icon will appear on the display and at the same
time, the result is displayed on the lower side of the display (press +/= key again to cancel the add
operation);
● Press READ key again for second time measurement, the measured value is displayed on upper
portion of the screen;
● Press +/= key again to display the sum on the lower portion of the screen;
● Repeat the steps above can continue accumulation.
3、Addition (using M memory)
● Press the M key to save the first measured result, and the “M+” will appear on the display;
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