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.
Calibration Assumptions:
  • 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
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Defined Variables:
  • d = Distance From the Center of Shaft to the Weight Hanger Pin
  • T = Computed Simulated Torque
  • W = Calibration Weight
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START
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Follow Appropriate Lock-Out / Tag-Out Procedure
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Disassemble Test Stand (as Needed)
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Attach the Calibration Arm
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Attach the Weight Hanger to the Calibration Arm
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Perform a “Zero Calibration Procedure” by
Pressing "AUTO - ZERO"
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Hang Spanning Weights on the Weight Hanger
If Necessary, Wait for the Weights to Stop Swinging
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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
Example Units:
Imperial: T(lb­ft) = d(ft) ∙ W(lbs)
SI: T(Kg­m) = d(m) ∙ W(Kg)
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(Load) Set Active Lever Wheel to Calibrated Torque Value (T) on the Controller and Press "AUTOSPAN"
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Remove Weight and Verify Zero
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Yes
If Not Zero
Remove Weight Hanger and Calibration Arm
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Perform Another Zero Calibration Procedure
by Pressing "AUTO - ZERO"
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Re-Assemble the Test Stand
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CALIBRATION COMPLETE