Dual-solvent washing, Solvent wash by computer, Preventive maintenance – Cannon Instrument miniPV-X User Manual

Page 87

CANNON

miniPV-Series Automatic Viscometer with VISCPRO

Instruction & Operation Manual

Version 1.a— January, 2011;

CANNON

Instrument Company

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

reference thermometer to ensure that the miniPV Series is controlling at
the desired operating temperature. If the computer temperature display
does not agree with the reference thermometer, perform the temperature
calibration procedure per manual instructions.

Dual-solvent washing

For testing heavy oils or hard-to-clean materials,

CANNON

Instrument

Company recommends a dual-solvent washing system. The dual-solvent
washing process uses two different solvents. The first wash might
ordinarily use a heavy solvent to clean the sample residue out of the
viscometer tubes. The second wash might use a lighter solvent to clean
the remaining sample and solvent residue from the viscometer tube.
Consult Chapter 1 for information on dual-solvent connections.

Solvent wash by computer

Use the following procedure for computer-controlled solvent washing:

Procedure

1. If the desired tube is testing a sample, wait until the test is complete

OR click the

Abort

button from the

Sample Input wi

ndow and select

the tube/tray to abort from the

Select Trays

window. Then click

2. Proceed with the solvent wash by clicking the

Wash Tubes

button

from the

Sample Input

Machine Status

windows. Or you may

click on

Service/Wash Viscometer Tube

from the VISCPRO

primary menu options.

3. Click on

Begin Wash

to initiate a solvent wash using current wash

settings. During the wash cycle, the

Begin Wash

button will change

Abort Wash

. If it is necessary to interrupt the wash cycle, click

Abort Wash

NOTE

The wash procedure will have to be successfully completed before further
sample testing will be allowed. For information on using the computer to
select wash parameters, see Chapter 4.

4. After the tube has been washed, click

Done

to close the

Wash

Viscometer Tube

window.

Preventive maintenance

The miniPV Series is a precision instrument, durably crafted for years of
trouble-free operation. Because of the desirability of consistent viscosity
measurements over time, preventive maintenance is limited primarily to
cleaning and inspection procedures, rather than regular replacement of
equipment items.

Following is a recommended PM schedule. You may copy the checklists
and use them to track your PM actions. For detailed descriptions of listed
procedures, consult related sections of this manual.