DeWalt DW077 Manuale Utente Scaricare il pdf (Pagina 3)

4. Rotate the laser unit on the tripod head 180 degrees, so that the “X” marking is lined up

STRAIGHT AWAY from the On-Trak targets.

5. Once the reading stabilizes, write down the new “Delta Position” value, including the +/- sign, and

label it “-X”.

6. Subtract the “-X” value from the “+X” value, and write this down as “X Error”.

7. If the “X Error” is within the limits shown in the table below, then the unit is already calibrated.

If the “X Error” is outside of the limits, then the unit must be recalibrated.

X-AXIS AND Y-AXIS ALLOWABLE ERROR

(Equivalent to 20 arcseconds or 1/8” at 100 ft.)

Distance from On-Trak 1 to On-Trak 2

4.5m

(14’9”)

(16’5”)

5.5m

(18’)

(19’8”)

Allowable Error

+/- .44

+/- .48 +/- .53 +/- .58

Step 3: Write down value in “Delta

Position Box for +X direction

Step 5: Write down value in “Delta

Position Box for -X direction

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DeWalt DW077 Manuale Utente Pagina 3