Cannon Instrument TESC - Manual (Page 29)

TESC Operator's Manual, Rev 1.0
23
CANNON® Calibrating the TESC System
e. In the Parameter Menus, open EZ-ZONE PM > Setup > Analog Input . The
Calibration Offset is shown in the display window.
10. When the DV2T test completes, save the test data from the DV2T to a CSV file on a USB
drive and transfer it to the PC. On the PC, use a spreadsheet to open the CSV file. In the
sample information, add the sample ID.
Note: Because the TESC System is calibrated during manufacturing,
only small adjustments of ± .1 °C should be necessary to fine tune the
temperature setting.
If desired, the actual temperature of the sample may be determined
using a viscosity calculation tool, such as VISDISK®.
𝑛𝑛𝑛𝑛𝑛𝑛 𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑛𝑛𝑜𝑜 = 𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑛𝑛𝑛𝑛𝑜𝑜 𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑜𝑛𝑛𝑜𝑜 + �
𝑎𝑎𝑐𝑐𝑜𝑜𝑐𝑐𝑎𝑎𝑎𝑎 𝑣𝑣𝑣𝑣𝑜𝑜𝑐𝑐𝑜𝑜𝑜𝑜𝑣𝑣𝑜𝑜𝑣𝑣 − 𝑜𝑜𝑛𝑛𝑜𝑜𝑜𝑜𝑛𝑛𝑡𝑡 𝑣𝑣𝑣𝑣𝑜𝑜𝑐𝑐𝑜𝑜𝑜𝑜𝑣𝑣𝑜𝑜𝑣𝑣
𝑅𝑅𝑎𝑎𝑜𝑜𝑛𝑛 × 10
�
Where:
Rate of viscosity response to temperature change:
600 mPa(s) per 0.1 °C for N27C at –40 °C
2200 mPa(s) per 0.1 °C for N480B at –26 °C
11. Using the data in the spreadsheet, compare the measured viscosity at the highest torque
reading to the calibrated viscosity of the sample.
• If the measured viscosity is higher than the calibrated viscosity, then the
temperature of the sample is lower than the target temperature. Subtract 0.1 °C from
the value shown for the Calibration Offset and enter this new value into the
Watlow® configurator program. Continue to step 11.
• If the measured viscosity is lower than the calibrated viscosity, then the temperature
of the sample is higher than the target temperature. Add 0.1 °C to the value shown
for the Calibration Offset and enter this new value into the Calibration configurator
program. Continue to step 11.
• If the measured viscosity is within the tolerance range of the calibrated viscosity of
the sample, the temperature of the sample is correct. Calibration is complete, go to
step 16.