Koehler KV5000, Руководство по эксплуатации и инструкция, Страница: 18 / 34

KV5000 Instrument & Software
Operation and Instruction Manual
KV5000-Manual
- 14-
Setting the Temperature . Set the desired
operating temperature by adjusting the set
point with the up and down keys. The set point
will be displayed in the lower green Set Point
LED display and the actual temperature will be
displayed in the upper red Process LED
display. Please allow the instrument to fully
equilibrate before proceeding with any testing.
Temperature Calibration. This routine allows the
digital temperature controller to be calibrated
to a certified thermometer. In the calibration
mode, the display will always give 2 decimal
places.
a. Use a certified calibrated measuring
device to acquire the temperature.
Calculate the difference between the
measuring device and the Process value
displayed on the controller.
b. Press the program key two times until PCt
is displayed in the lower green LED
display. Press the DOWN key. CAL will
display on the lower green display. If there
is a value observed in the upper red LED
display, add it to the calculated difference
obtained in the previous step. This is the
offset value.
c. Press the Program Key. The lower green
display will flash. Use the up or down keys
to adjust to the new calibration offset
value on the upper red display calculated
in the previous step. When the value has
been
entered, the controller will
automatically store the value. The lower
green display will stop flashing. If further
adjustments are necessary, press the
Program Key again. Resume regular
operations by pressing the Exit / Function
key two times. Verify if the new calibration
is correct by observing the upper red
display and comparing the value with the
calibrated reference device.
Auto Tune. This routine allows the digital
temperature control to learn the heating
parameters needed for any particular set point
temperature. This operation should be done
when installing a new unit, after replacing or
changing the bath medium type, or utilizing a
different temperature set point 20% different
from
the previously used set point
temperature.
a. Set the operating temperature to the
desired setting.
b. Press the up and down arrow buttons
simultaneously for about 5 seconds. When
Auto Tune is active, the lower green LED
display will blink
TUNE . Auto Tune will
automatically toggle off when the set point
temperature is reached. Auto tune can be
terminated by pressing the up & down
buttons simultaneously again.
4.4 Recommended Accessories

Withdrawal Bulb . Use to pull sample into
viscometer tube.
Part number: K22090

Rubber Stopper . Use to plug viscometer
tube and hold up sample prior to testing.
Part number: K23311

Operation near or below ambient
temperatures.
A water supply or external
chiller may be used to maintain the
temperature of the bath for cooler
temperature. Hose-barb connections for
water or refrigerated coolant are located at
the top of the bath. There are two
connections: inlet and outlet. The hose
connections can be secured with copper
wire to prevent the tubing from disengaging
from the connection.
5 Operation
This unit is designed for performing kinematic
viscosity tests using glass capillary viscometers.
Please be sure to read the safety and hazard
warnings, the installation procedure, and any of
the standard test methods before operating this
instrument.
5.1 Bath
Fill the bath with the appropriate heat transfer
fluid based upon the testing temperature. Fill the
bath with the medium from the top through one of
the seven port openings using a wide neck funnel
with a 500mL griffin beaker adding about ½ L at a
time to 2" (5 cm) from the top of the bath to allow
room for fluid expansion. This will provide the
proper depth for immersing the viscometers and
allow for thermal expansion.