Brookfield TT100 - Dual Range Viscometer Span Calibration

Calibration
3-14 P/N M/97-520
Dual Range Viscometer Span Calibration
In this procedure, calibration bars will be used to simulate a torque the
torsion element will encounter during dual (high and low range)
measurement of your specific process fluid. Span calibration allows the
torque sensor electronics to be adjusted with the calibration bar applied for
the specific range gain in milliamperes from the no torque (zero point) set
at 4.00 mA through 20.00 mA.
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.
NOTE: Refer to the high and low range information within the Viscosity &
Calibration Data on the Viscometer Specification Sheet, that came with
your viscometer, for the appropriate range calibration information to be
used for this calibration procedure. Only one calibration bar may be
supplied with dual range units if the same bar is used to calibrate both
ranges.
1. Turn power OFF to the motor controls and torque sensor
electronics enclosure and remove the cover.
2. Remove the sensing endcap from the viscometer as follows:
CAUTION
Handle the sensing endcap assembly with care when removing it from the
measuring chamber to prevent damage to the torsion element.
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.
3. Place the sensing endcap flange in a vise to hold it secure and
parallel to the work surface as shown in Figure 3-7.
4. Make sure the torsion element is clean. Refer to Section 5 -
Maintenance for more information.