fann 35SA/SR-12 - User Manual

Questions and Answers

K
Katherine SanchezAug 9, 2025
Why are my Fann Measuring Instruments out of calibration?
- C
  Chase HunterAug 10, 2025
  If your Fann Measuring Instruments are out of calibration, it could be due to several reasons. Contaminated bob shaft bearings can cause this, and the solution is to replace the bob shaft bearings (P/N 207450). A bent bob shaft can also be the culprit; try to slightly bend the shaft to straighten it, or contact Fann for repair or replacement. Other possible causes include a bent rotor (replace the rotor), a damaged or incorrectly installed torsion spring (refer to Section 5.4 to replace the torsion spring), or an incorrect motor speed (replace the motor with P/N 207446 or 207447).
B
bmendezAug 16, 2025
What to do if my Fann Measuring Instruments have erratic dial motion?
- H
  Hayley SmithAug 17, 2025
  Erratic dial motion in Fann Measuring Instruments can stem from a few issues. One potential cause is contaminated bob shaft bearings, which can be resolved by replacing the bob shaft bearings (P/N 207450). Another cause might be a bent bob shaft; in this case, try bending the shaft slightly to straighten it, or contact Fann for repair or replacement. Finally, a rotor out of alignment or damage to the rotor can also lead to erratic dial motion, so replace the rotor if necessary (refer to Table 9-1 for a list of rotors).
G
Gregory LoweAug 25, 2025
What causes excessive run-out of rotor in Fann Measuring Instruments?
- L
  Lisa HowardAug 25, 2025
  Excessive run-out of the rotor in Fann Measuring Instruments can be caused by a damaged rotor, which requires replacement (refer to Table 9-1). Another potential cause is contamination in the main shaft recess, in which case you should contact Fann for repair.
D
David AndersonAug 31, 2025
How to fix excessive noise in Fann Measuring Instruments?
- M
  michael04Aug 31, 2025
  Excessive noise in Fann Measuring Instruments may be due to lubrication failure or contamination in the gears, in which case you should contact Fann for repair. It could also be caused by a worn center thrust washer, which also requires you to contact Fann for repair. Another possible cause is that the top cover is not set properly; try adjusting the top cover.