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7.2.7 Addition
1. Switch on the laser instrument.
2. Direct the laser point at the target.
3. Take an individual measurement.
4. Press the Add/subtract button to add the next individual measurement.
(plus appears on the display).
5. Take an individual measurement.
The laser instrument shows the result on the bottom line of the display. This process can be repeated as
many times as required.
7.2.8 Subtraction
1. Switch on the laser instrument.
2. Direct the laser point at the target.
3. Take an individual measurement.
4. Press the Add/subtract button twice to subtract the next individual measurement.
(minus symbol - appears on the display).
5. Take an individual measurement.
The laser instrument shows the result on the bottom line of the display. This process can be repeated as
many times as required.
7.3. Guidance for operation
The laser instrument must not be moved while measuring. A fixed mounting surface with a stop is there-
fore recommended. The laser outlet and receiving area must not be covered during measurement.
Depending on the measured surface, it cannot be guaranteed that all measurements are completely
accurate. Avoid surfaces that are textured, reflective, transparent, or porous.
CAUTION
The three points measured must run in a line and the second measurement must be taken at a
right angle to the measured surface; otherwise measured values may be incorrect.
