Pioneer SGX-CA600 User Manual page 251

Tangential force: Check that the force is within the range of 0 ±3 N.
Radial force: Check that within the range of 0 ±3 N.
Battery: Check the battery level and status.
New: New battery
Good: Good state
OK: Normal
Low: Low
Critical: Cannot be used
Note
! If a value is outside of the range, zero point calibration may have been
performed when the crank is in an unstable state such as when it was
moving.
Perform zero point calibration again when the crank is still.
! If the battery status is low or critical, replace the batteries of the both the
left and right sensors at the same time.
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