Powerware ST-2400S and the RPM sensor gear. Make sure that they are not loose, inaccurate

	and the RPM sensor gear. Make sure that they are not loose
	and that the runout of the RPM gear is not excessive. Check
	the RPM sensor connector to be sure that it is tight. Check
	the cable from the RPM pickup to the horsepower computer.
	Check the power supply to the horsepower computer. Have
	the horsepower computer checked.
Torque readings are	Operate the unit using the ZERO and CHECK functions. If
inaccurate	the readings do not agree with the tables above, unit needs
	to be repaired. Check the load cell mounting to be sure that
	it is not loose. Check the dynamometer to be sure that it is
	not in a bind. Check the torque calibration of the
	horsepower computer. Check the power supply to the
	horsepower computer. Have the horsepower computer
	checked.
Residual Torque readings	Pressure or force on the dynamometer absorption unit cradle
are high when the	may be causing the residual readings. Remove the load cell
dynamometer is stopped.	from the torque arm of the dyno to see if this removes the
	excessive residual torque reading. Manually rock the torque
	arm of the dyno. It should move freely and easily a
	minimum of 0.5 inches (12.7 mm) up and down. The load
	cell must be in a free floating position when not under load.
	Re-adjust the torque cable and connectors if necessary.
	Check the calibration zero of the horsepower computer.
	The load cell may be damaged and need to be replaced.
	Have the horsepower computer checked.

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