Topcon DL-501 Instruction Manual page 116

21. CHECKS AND ADJUSTMENTS
When both offset values fall within the range
±1', adjustment is complete.
Press {ESC} to return to <Config menu>.
If one of the offset values (Xoffset, Yoffset)
exceeds ±1', repeat the check and adjustment
procedures from the beginning. If the
difference continues to exceed ±1' after
repeating the check 2 or 3 times, have your
local dealer perform the adjustment.
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