Dillon AP Dynamometer - Manual

Dynamometers
Installation and Operation Guide
Dillon Mechanical Dynamometers are designed to measure tension forces and weight.
CAUTION: Dillon Dynamometers are not designed for measurement of dynamic shock loads and should not be
subjected to sudden force. Load or weight should be applied in a gradual manner to avoid damaging the Dynamom-
eter. Torque loads applied to the dynamometer should be relieved or avoided.
Heavy duty needle bearings inserted in each end of the Dynamometer deflection beam (or into both sides of the
shackles ears) allow the shackle pin to rotate as force is applied. Bearings should be cleaned periodically in a
suitable solvent. After drying, the bearings should be treated with a coat of light machine oil. DO NOT allow oil to
run into the mechanism case. The mechanism should never be oiled as this tends to attract dust or dirt.
Drain holes have been provided in the bottom of the mechanism case. If the Dynamometer should be accidentally
immersed, hold it so that water is free to run out through these holes and allow to dry.
Dillon supplies shackles and pins with the dynamometers that have been confirmed to properly work with our
mechanical dynamometers. Do not use shackles or shackle pins that have not been qualified by Dillon. Some
forged ProLift Dillon shackle pins may be intentionally machined to specific diameters to facilitate proper fit with the
bearing race. Lower profile non-machined spots can often be observed and are normal.
If any type of accessory fitting is made for use with the Dillon Dynamometer, be sure to machine this from high
grade aircraft alloy and heat treat it in order to ensure maximum safety.
NOTE: Dillon-Weigh-Tronix is not responsible for failure of attachment fittings furnished by others.
Zero the dynamometer for best accuracy. To properly zero the instrument when using the max pointer, adjust the
black needle below the desired tare point using the zero adjustment wheel on the rear of the case. Move the red
maximum pointer counterclockwise until it contacts the black needle. Use the zero adjustment wheel to simulta-
neously move both pointers to the desired tare point. This procedure will prevent the slight drag of the max pointer
from influencing the displayed reading. If the max pointer is not required, rotate the red pointer clockwise until it
reaches the zero position and operate normally.
WARNING: Failure to adjust the max hand prior to use of the Dynamometer WILL affect the readings if the max
hand is used.
Dillon Mechanical Dynamometers permit zeroing of up to 20% of instrument capacity. Do not zero off a
deadload and then use the instrument to capacity.
The Dillon Dynamometer is a precision instrument and will provide many years of dependable service if given
reasonable care and suitable protection. Many firms make it a regular practice to return Dynamometers to their
distributors at 6 to 8 month intervals (depending upon how much they are used) to have accuracy recertified. We
recommend this at least once a year. Consult with your Dillon distributor concerning any questions you may have
about recalibration intervals.