Cannon Instrument miniAV-LT - Manual (Page 82)

CANNON ® miniAV-LT Automatic Viscometer with VISCPRO ® Instruction & Operation Manual
Version 1.a— May, 2009; CANNON ® Instrument Company
2139 High Tech Road • State College, PA 16803 • USA
78
Draining the bath
CAUTION Remove MAINS power from the instrument before beginning the drain
procedure.
1. Open the stop cock valve on the rear panel of the miniAV-LT.
2. Fluid should begin draining from the bath into the storage container.
3. When fluid has drained from the bath, close the drain valve.
The miniAV-LT Bath Unit is equipped with a fluid level sensor located
on the left ear side panel. If the bath fluid level drops to an unaccept-
able level, the LED will illuminate and the bath light will shut off
alerting the operator to abort bath operations until an acceptable bath
fluid level is restored.
Checking solvent levels
Frequently inspect the user-supplied solvent vessel to ensure a steady
supply of cleaning solvent for the viscometer tubes. When the solvent
level drops to within 2.5-5.0 cm (1-2") of the bottom of the solvent
vessel, it should be refilled.
Solvent/drain lines
See the Installation section of the first chapter for information on solvent/
drain lines for the miniAV-LT instrument.
Ventilation
The miniAV-LT 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-LT 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
Checking bath temperature
After the miniAV-LT 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-LT 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.