Our load cells and torque sensors are
supplied with at least a one direction calibration certificate traceable
to the NIST. Dead weights and transfer standards and all measurement
equipment used to calibrate our products are certified on a regular
Four load points are recorded from zero to full scale increasing and decreasing
with the errors documented as linearity and hysteresis as percent of full
scale. This procedure is repeated and the difference between runs documented
as repeatability error as percent of full scale. Finally, with the load
cell or torque sensor at zero (NO LOAD) position, a precision wire wound
resistor is placed across (-) power lead (black) and (-) signal lead (white)
producing a millivolt output. Our calibration certificate will reflect
this resistor value and millivolt output along with calculated percent
of full scale and engineering units to be used later for system calibration.
Our load cell and torque sensor related instrumentation (with or without
display) utilize the resistance (R-CAL) method of calibration transfer.
The precision resistor value stated on our calibration certificate and
explained above is supplied with our instrumentation as a internal or
external (R-CAL) resistor. A push button or momentary switch shunts the
load cell bridge, and the span pot is quickly and accurately adjusted
to the engineering units equivalent stated on the calibration certificate.
Call For Applications Assistance (800) 344-3965