Topcon DL-501 Instruction Manual page 108

20. WARNING AND ERROR MESSAGES
File read error!
An error occurred while trying to read in a file.
Contact your local dealer.
File system error!
File write error!
It is impossible to read in/write data.
When trying to write to a USB device, check that the USB is not read-only.
Otherwise, contact your local dealer.
Fixed pt record full!
No more fixed points can be recorded.
Delete unnecessary JOB or route data and try again.
Fixed pt record full in current route!
No more fixed points can be recorded in the current route.
Focusing error
Something obscured the staff during Auto Focus, the brightness level suddenly altered. or the DL
was subjected to large vibrations resulting in a poor focus condition.
Hd diff. over !
The measured distance is outside the range (BF dist diff.) set in route settings.
Ht-diff. over !
The difference in relative height over the 2 measurements is outside the range (dH range)
set in route settings.
Lower dist is greater than upper dist!
The value set in Lower dist is greater than the value set in upper dist value.
Lower Rh is greater than upper Rh!
The value set in Lower Rh is greater than the value set in upper Rh value.
Max JOB num.
No more JOBs can be backed up to the external memory device. The maximum (100) has been
reached.
Try again after deleting unnecessary JOBs.
Max route num.
The maximum number of routes (100) has been reached.
Try again after deleting unnecessary routes.
Meas. error
An object other than the staff is being sighted.
The staff is out of focus.
The staff is partly unreadable because obscured by an obstacle or is damaged.
The staff is too close or too far away.
A shadow is falling on part of the staff.
The staff was incorrectly sighted.
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