Johnson Level & Tool Mfg. 40-6060 - Manual (Page 8)

8 ©2012 Johnson Level & Tool - Rev. 2
6. Self-Check and Fine Calibration
Horizontal Accuracy Check
1. Turn on the digital level and put it on a smooth and level
surface as shown in figure 1. Wait 10 seconds until the display
digits are stable and record the degree reading.
2. Rotate the digital level 180º in the same plane, see figure 2,
wait 10 seconds until the display data is stable then record
the second degree reading.
3. Turn over the digital level in the same plane, figure 3, wait 10
seconds and record the third degree reading when it is stable.
4. Rotate the digital level 180º in the same plane, figure 4, wait
10 seconds and write down the fourth degree reading when
stable.
5. Of the four degree readings, if any two of the values have a
difference over 0.2º, the unit must be recalibrated.
Figure 1
Figure 3
Figure 2 Figure 4
IMPORTANT: It is the responsibility of the user to verify the
calibration of the instrument before each use.
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