PLT 400 Firmware 4.0.471 Release - Summer 2026

  • Updated
Firmware 4.0.471 for the PLT 400 is now available, delivering important improvements that help users stay productive on the jobsite. Please see this article for help in updating your tool.
 

Improved Tilt Calibration Robustness

The PLT 400's tilt calibration process has been enhanced to make it more resilient in real-world jobsite conditions.
These improvements help reduce unnecessary tilt calibration interruptions and instances where users need to repeat tilt calibration despite having a stable instrument setup.
 
Customer benefits:
  • Fewer workflow interruptions caused by repeated tilt calibration
  • Less time spent troubleshooting calibration messages
  • A smoother and more reliable experience throughout the working day

Improved Height Measurement Consistency

Firmware 4.0.471 also introduces improvements to how the PLT 400 processes and validates sensor data during operation, particularly for height measurements.
 
These enhancements improve height measurement consistency and help reduce situations where users experience unexpected changes or conflicting height measurement results.
 
Customer benefits:
  • Greater consistency when performing height measurements
  • Reduced occurrence of unexpected height measurement deviations
  • More confidence in height measurement results, allowing users to stay focused on the task at hand

Compatibility with Newly Manufactured Batteries

Firmware 4.0.471 ensures compatibility with B22/4.0 CPC batteries manufactured after May 2026. See this article if your total station seems to be chirping or beeping consistently, which indicates a battery compatibility issue.
 
As newer batteries enter the market, this update helps ensure uninterrupted tool operation and allows customers to continue using the latest available batteries without compatibility concerns.
 
Customer benefits:
  • Compatibility with newly manufactured batteries
  • Uninterrupted operation as new battery production enters the market
  • Confidence that tools remain ready for future battery supply

What Users Should Expect (Summary)

With Firmware 4.0.471, users should experience:
  • Improved tilt calibration robustness in everyday jobsite conditions
  • Fewer workflow interruptions caused by unnecessary tilt recalibration
  • Improved consistency in height measurements
  • Compatibility with newly manufactured batteries
  • Greater confidence to stay focused on the job rather than the tool
 
 
 

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