Sheet (천/필름/직물등) 텐션메타 WC

NOTE: This instrument is extremely sensitive to the force of gravity upon it.
This meter has been calibrated using free-hanging weights on a vertical axis.
THUS, READINGS FOR THIS INSTRUMENT WILL FLUCTUATE DEPENDING ON THE ANGLE AT WHICH THE METER IS HELD.
To compensate for vertical or horizontal position: Hold instrument in position to be used. The material should go over the center sensing roller and under the outside guide rollers.
Loosen bezel lock-screw. Turn dial to zero setting. Retighten lock-screw.
DO NOT PLACE THUMB ON THE INDICATOR SENSING BLOCK.
This instrument has a linear dial. The dial reading is a reference to the load applied – not exact tension. For instance, calibrating to a specific material, using a 50 lb weight on a 10" wide strip of material, the dial reading denotes a tension of 5 pli.
If necessary to determine the exact pli tension, use the Calibration Procedure described below. Stiffness and thickness will affect the dial readings; therefore, separate calibrations are necessary for each different stiffness and thickness, even if the material is the same.
CALIBRATION PROCEDURE:
Suspend a 10" wide strip of your material from overhead. Apply the maximum safe load for the material (ex: 100 lbs on a 10" wide strip equals 10 pli; 50 lbs equals 5 pli, etc.). Care should be taken when applying weight to the material.
Hold the tension meter so that one reference roller is above the other. Loosen bezel
lock-screw. Turn dial bezel to zero setting. Retighten lock-screw.
Clip the tension meter onto the loaded material. Slide the meter up and down on the material, while carefully holding the handle completely down. Note the reading.

The WC-Series tension meters are available in maximum ranges of 10, 20, 50 or 100 pli. Each instrument is provided with a sturdy polyethylene carrying case with dense foam inserts to protect the meter. Made in the U.S.A.