Dynamometer Torque Calibration Procedure - Two-Point / Single-Direction for Dyn-Loc IV
The flow chart below is to assist with calibrating the torque of an AC dynamometer using a Dyn-Loc IV dynamometer controller with the two-point ⁄ single direction method.
- Weights Are Present
- Mass of Weights Are Known
- Calibration Arm Length is Known
- Operator Has Access to the Front of the Dyn-Loc IV Dynamometer Controller
- d = Distance From the Center of Shaft to the Weight Hanger Pin
- T = Computed Simulated Torque
- W = Calibration Weight
Follow Appropriate Lock-Out / Tag-Out Procedure
Disassemble Test Stand (as Needed)
Attach the Calibration Arm
Attach the Weight Hanger to the Calibration Arm
Perform a “Zero Calibration Procedure” by
Pressing "AUTO - ZERO"
Hang Spanning Weights on the Weight Hanger
If Necessary, Wait for the Weights to Stop Swinging
Compute the Simulated Torque Value Based on the Amount of Span Weights and the Calibration Arm Length
DO NOT Include the Weight of the Hanger or Calibration Arm Since These Values Have Already Been Zeroed Out
Imperial: T(lbft) = d(ft) ∙ W(lbs)
SI: T(Kgm) = d(m) ∙ W(Kg)
(Load) Set Active Lever Wheel to Calibrated Torque Value (T) on the Controller and Press "AUTOSPAN"
Remove Weight and Verify Zero
If Not Zero
Remove Weight Hanger and Calibration Arm
Perform Another Zero Calibration Procedure
by Pressing "AUTO - ZERO"
Re-Assemble the Test Stand