TT100 In-Line Viscometer Installation, Operation, Maintenance and Service Instructions
P/N M/97-520 3-11
b. While holding the sensing endcap in position, remove the
last screw and carefully remove the sensing endcap from the
measuring chamber.
NOTE: Both the torsion element axis and the calibration bar axis must be
within 8º of horizontal for calibration within the limits of the instrument.
3. Carefully place the sensing endcap flange in a vise to hold it secure
and parallel to the work surface as shown in Figure 3-6.
4. Make sure the torsion element is clean. Refer to Section 5 -
Maintenance for more information.
5. Disconnect milliampere output cable from J1 Pins 1 and 2 on the
torque sensor electronics circuit board.
6. Perform the following steps to allow Digital Volt Meter (DVM)
connections to the torque sensor printed circuit board:
a. Cut two lengths of #18 - 24 AWG wire 6 inches long.
b. Strip approximately 1/8 inch of insulation off each end.
c. Connect one wire to J1-Pin 1.
d. Connect the second wire to J1-Pin 2.
7. Depending upon your viscometer’s range (refer to viscometer
specification sheet), verify that the range jumper wire between
J2-Pin 1 and J2-Pin 3 (HIGH range) or J2-Pin 1 and J2-Pin 2
(LOW range).
8. Turn power ON to the torque sensor electronics enclosure.
9. Set the digital volt meter (DVM) to the 0 - 20.00 mA scale.
10. Connect the DVM positive lead to the wire on J1-Pin 1.
11. Connect the DVM negative lead to the wire on J1-Pin 2.
12. Observe the DVM reading. Adjust R18 for 4.00 mA.
NOTE: If you cannot obtain 4.00 mA by adjusting R18, set R18 to mid
point (approximately 7.5 turns) and then perform the Fine Zero Voltage
Calibration procedure.
NOTE: To ensure proper span calibration, make sure the calibration bar is
installed as shown in Figure 3-6.
NOTE: Both the torsion element axis and the calibration bar axis must be
within 8º of horizontal for calibration within the limits of the instrument.
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