12. Transducers/Cables
NOTE: 12.1 covers the FWD Load Cell and 12.2 covers the HWD Load Cell.
12.1 UUFWDUU Load Cell 86207
12.1.1 Key Features
Compact Size
Centre Bore for Centre Deflector rod
Resistance to Extraneous Forces
Long Term Stability and Fatigue Life
True Linearity
High Output
12.1.2 Description
The DYNATEST FWD LOAD CELL 86207 is a low profile shear web design strain gauge
type load cell. Despite its range of 250 kN (55 kips), it features a height of only 45 mm
(1.75”). Due to the shear web design, the cell will deflect less than 30 microns (1.2 mil) at
max. FWD peak load.
The load cell is mounted directly on top of the loading plate to minimize errors due to inertial
forces from masses below the cell. This placing requires, however, that the load cell has a
centre-bore for the centre deflector holder stem.
Despite the low profile, the high range and the low cell deflection, the FWD load cell features
a high electrical output of approx. 36 mV at max. FWD peak load and 15V excitation.
12.1.3 Specifications
Range: 250 kN (55 kips)
Nom. sensitivity: Approx. 16 µV/V/kN (73 µV/V/kip)
Excitation: 20V (DC or ACrms) max.
Sensitivity shift with temp.: 0.002%/deg. C (0.001%/deg. F) max.
Output resistance: 350 ohms (± 0.5%)
Temperature range: -30 to +80°C (-20 to 175°F)
12.1.4 Calibration
The DYNATEST FWD LOAD CELL 86207 has a nominal sensitivity of approx. 16
microvolts per volt excitation per kilo Newton of applied load (73 µV/V/kip).
The exact sensitivity has been achieved by a multi-point calibration against a special
high-precision reference load cell.
As the load cell is used in connection with the Compact 15 System controller, which has an
automatic shunt calibration facility, the cell sensitivity achieved by the above mentioned
calibration is specified as a shunt calibration value.
Shunt calibration means that a very precise resistor (0.1% tolerance) is connected in parallel
with one of the four “legs” of the strain gage bridge of the load cell, thus equivalating a
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