Cell calibration test procedure – Cannon Instrument CMRV-4500 User Manual

Page 44

CANNON

Mini-Rotary Viscometer CMRV-4500 Instruction & Operation Manual

Version 1.1e—October, 2011 •

CANNON

Instrument Company

2139 High Tech Road • State College, PA • 16803 • USA

NOTES

To reduce the chance of separating the mercury column during the heating
phase of the temperature profile, you may wish to initially remove the
calibrated thermometer from the CMRV unit. Store the thermometer in a
vertical position. You may replace the calibrated thermometer when the
CMRV has cooled to 30°C or lower. If the thermometer is not in place
during CMRV-4500 cooling, you should seal the thermometer well in the
block and the thermometer hole in the Plexiglas

cover with stoppers,

particularly when the humidity of the ambient air is high. This will help
prevent frost buildup on the surface of the block and enhance temperature
control.

Be sure the thread is properly wound around each rotor and the Plexiglas

cover is in place on top of the CMRV-4500 before proceeding with the test.

Cell calibration test procedure

Cell calibration

Use the VISCPRO

software to input calibration information as follows:

1. Load the VISCPRO software and make certain that the MRV instru-

ment is listed on a button bar at the bottom of the Primary Window.
If it is not, click

Poll for Instruments

from the

Main

menu to

establish computer contact with the CMRV unit.

2. Click

Service/Calibrate Cell Constants

. The

Calibration Param-

eters

window will open.

3. Click the

Temperature

field and select the desired calibration

temperature from the drop-down options.

4. Click the

Mass

field and select the correct value for the test mass.

5. Click the

Known

Viscosity

field and input

the known viscosity of
the standard at the
calibration temperature
in centipoise (mPa·s).

6. Click the

Calibrate ...

button to open the

Calibrate Cell Con-
stants

window. The

CMRV-4500 will cool to
the desired calibration
temperature and main-
tain the temperature for
one hour. When the
instrument has com-
pleted the calibration
profile, the

Status

field

in the

Calibrate Cell

Constants

window will

indicate

Ready to Calibrate

Running a calibration test