Ventilation, Checking bath temperature, Dual-solvent washing – Cannon Instrument miniAV-X User Manual

Page 87: Solvent wash by computer

CANNON

miniAV-X Automatic Viscometer with VISCPRO

Instruction & Operation Manual

Version 1.0b— March, 2012;

CANNON

Instrument Company

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

Ventilation

The miniAV-X requires installation of the supplied 3” ventilation hose to
the exhaust shroud on the rear panel of the unit. The shroud must be
connected to a customer-supplied exhaust fan/ventilation system. A 3”-4”
hose adapter is shipped from CANNON Instrument Company with each
miniAV-X unit. The air flow rate and design of the exhaust fan must be
suitable to handle the vapors from the customer-supplied solvent and
samples.

Checking bath temperature

After the miniAV-X has been turned on, you may monitor bath tempera-
ture via a reference thermometer in the bath or via the software tempera-
ture display (Sample Input window). Temperature should rise until the
bath has attained the desired test temperature. Consult the reference
thermometer to ensure that the miniAV-X is controlling at the desired
operating temperature. If the computer temperature display does not
agree with the reference thermometer, perform the temperature calibra-
tion 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.