Johnson Level & Tool Mfg. 40-6935 - Manual (Page 22)

22 ©2011 Johnson Level & Tool
Error Display
Note: If above errors appear, act according to corresponding actions
mentioned above. If errors still exist, then the instrument needs repair.
Installation and Removal of the Base
Base Removal
• Rotate the Tribrach locking lever 180° counterclockwise.
• Hold the base plate with one hand, and with the other hand lift up
the instrument by the handle.
Base Installation
• Lift the instrument by hand, and aim the positioning block to the
notch on the base plate. Mount the instrument on the base plate
carefully.
• Tighten the clamp knob on
the base plate.
b Instrument exceeds its self-leveling range, level the instrument again.
Display Error Display & Explanation & Action
Err-04
Difference between every measuring value exceeds 30” during the repeated angle measurement.
Press “0-SET” key and measure again.
Measuring times of repeated angle measurement is more than 15. Press “0-SET” to measure again.
Err-06
Errors during the process of the vertical angle 0-set or adjusting 0-set when the inclination
to the horizontal angle exceeds 45º the instrument needs adjusting.
Positioning block
Notch
Tribrach Locking Level
4430H-English_Manuals 2/22/11 11:08 AM Page 22