Cannon Instrument miniAV-X - Manual (Page 84)

CANNON ® miniAV-X Automatic Viscometer with VISCPRO ® Instruction & Operation Manual
Version 1.Ob— March, 2012; CANNON ® Instrument Company
2139 High Tech Road • State College, PA 16803 • USA
78
4. Apply power to the instrument and adjust the potentiometer to get a
reading of 0.50V for the elevate driver.
5. Turn off the power to the instrument.
6. Disconnect the positive probe from the potentiometer lead of the
elevate driver.7. Connect the positive probe to the potentiometer lead
of the rotate driver. The rotate driver is located furthest from the
instrument.
7. Apply power to the instrument and adjust the potentiometer to get a
reading of 0.34V for the rotate driver.
8. Turn off the power to the instrument and remove the voltmeter probes.
9. Connect the stepper motors to the corresponding drivers.
NOTE The units are shipped with current cutback enabled i.e. the micro switch
is towards the white dot. This is the correct mode of operation and
should not be changed.
We are using quarter step resolution which means pin 3 and pin 7 are
connected and pin 2 and pin 7 are not connected.
Temperature bath
The temperature bath is capable of maintaining constant temperatures
between 20°C and 100°C. Silicone bath fluid is circulated via a central
stirring shaft with twin impellers. The bath also contains stainless steel
resistance heating elements. Solid state temperature control circuits
provide proportional control with reset. An over-temperature probe is
installed to protect all heating elements. It protects the bath from over
heating.
Bath fluid The temperature bath is ordinarily filled with Dow Corning 200 10 cSt
silicone fluid, available from
CANNON ® Instrument Company.
Filling the bath
CAUTION Remove MAINS power from the instrument before beginning the fill
procedure. The fill procedure should be performed when the bath fluid is
at ambient lab temperature.
Fill procedure 1. Obtain the (supplied) bottle, Fill Cap Assembly and bath fluid.
2. Remove the top panel of the bath unit to view and access internal
components.