Cannon Instrument TESC - Manual (Page 27)

TESC Operator's Manual, Rev 1.0
21
CANNON® Calibrating the TESC System
Calibration procedure
Use the following procedure to calibrate the Watlow® controller.
1. Turn on DV2T and TESC. If the Watlow® controller starts to run a program, press the
red EZ button to halt the test. (Steps symbol indicates a running program.)
Note: The 8 hour TESC calibration program lowers the temperature of
the sample to the desired soak temperature and maintains that
temperature for 8 hours, allowing the operator to run multiple
calibration tests.
2. Load the appropriate 8 hour TESC temperature calibration program into the Watlow®
controller:
a. Connect PC to Watlow® controller using RS-485 to USB cable.
b. Launch Watlow® configurator program:
Start Menu > EZ-ZONE Configurator > EZ-
ZONE Configurator .
c. Select Download a configuration file to a device . Click Next .
d. Select the COM port to which the Watlow® controller is connected. Click Next .
e. Select Load Program from File .
f. Select program:
• For –26 °C, select file D2983-TESC-Caliboffset-8h-Minus26-WatlowPgm.wcf .
• For –40 °C, select file D2983-TESC-Caliboffset-8h-Minus40-WatlowPgm.wcf .
g. Click Exit .
3. Autozero DV2T:
a. Remove spindle if present.
b. Lower viscometer to measurement position.
c. Level entire unit if necessary.
d. Select
Next on the DV2T AutoZero screen.
e. When the DV2T indicates AutoZero complete, raise viscometer.