Dust may have accumulated on the rotary sensor (disc) in the HB measurement component. Contact your dealer or a nearby sales office.
Check the alignment of the coupling connecting the shaft of the HB measurement component to the shaft of the test motor. Check for slipping at the coupling.
After excitation, suspend the weight on the calibration bar and check to confirm that the calibration bar is horizontal.
In certain cases, the shaft of the torque meter may not rotate if the starting torque of the test motor is low. Turn the shaft of the torque meter by hand. Also, check to see if the motor is in an excitation state.
Depending on the condition of the instrument when measurements end, some cogging torque may remain due to incomplete removal of magnetism (remanent magnetism) in the brake unit. To remove remanent magnetism, refer to the operating manual or the remanent magnetism degaussing method described on our website.
A worn bearing can cause rattling. If the instrument has seen extended use over many years, it may need to be inspected. Contact your dealer or a nearby sales office.
The motor analyzer or TB measurement component may be defective. Contact your dealer or a nearby sales office.
The TB-type products use a bearing to support the brake unit. Even if the test motor operates under no load, a small load is imposed by bearing and windage losses.
The torque sensor is probably defective. Contact your dealer or a nearby sales office.
Check the following:
For measurements from low-speed geared motors operating in the several hundred revolutions per minute range, we recommend changing the rotary sensor (disc) in the measurement component from the standard 60P/R to a 600P/R. Increasing rotation sensing resolution will allow measurements of low-speed rotation.
Check the following: