Calibration
3-8 P/N M/97-520
Preliminary Torque Sensor Test
Perform the following checks to make sure the torque sensor is not
damaged before calibrating the viscometer.
1. Remove the sensing endcap from the viscometer as follows:
CAUTION
The internal components of the viscometer must be empty of process fluid,
clean, and free of obstructions before it can be calibrated. Refer to Section
5 - Maintenance and perform the appropriate cleaning procedure for the
process fluid application.
Handle the sensing endcap assembly with care when removing it from the
measuring chamber. Damage to the torsion element may result by
contacting the stator with the rotor.
a. Remove seven of the eight screws that secure the sensing
endcap to the measuring chamber.
b. While holding the sensing endcap in position, remove the
last screw and carefully remove the sensing endcap from the
measuring chamber.
c. Carefully place the sensing endcap flange in a vise to hold it
secure and parallel to the work surface as shown in Figure
3-5.
2. Visually inspect the torsion element to make sure the wires are
straight and square. Gently straighten any minor deviations.
3. Check for the absence of friction within the torque sensor assembly
by performing the following steps:
a. Cut two lengths of #18 - 24 AWG wire 6 inches long.
b. Strip approximately 1/8 inch of insulation off each end.
c. Remove the cover from the torque sensor electronics enclo-
sure.
d. Connect the first wire to J1-Pin 1 torque sensor printed cir-
cuit board.
e. Connect the second wire to J1-Pin 2 torque sensor printed
circuit board.
f. Set the Digital Volt Meter (DVM) to the 0 - 20.00 mA scale.
To Next Page
Loading...
