5-19
Press [6] to initiate repeated motions in the same plane. We refer to this as" Exercise". The
motion (horizontal or vertical) is determined by the last command you chose. The instrument
counts the number of cycles and displays them as shown below. When you press a key to
terminate the exercise mode, the printer records the activity and number of cycles completed.
Exercising sipper motor
Cycle = 3 Hit any key to stop
Press [0] to return to Sipper diagnostic selections.
Sipper diagnostic: 1-Up 2-Down 3-Home
4-Clockwise 5-Counterclock 6-Exercise
Press [0] again to return to Motor diagnostic selections.
Motor diagnostic
1-Sipper motor 2-Stir motor 3-Turntable
Press [2] for Stir motor to turn on the motor that spins the magnetic stir bar in the Sample
Chamber. The bar should spin in "synch", i.e., not "jump" about the chamber as is observed
during brief periods of normal operation. The asynchronous motion is used to dispel air bubbles
from the chamber wall and probe surfaces.
You turn the Stir Motor off by pressing [2] again. The Stir motor may be activated with the
Sipper either in or out of the Sample Chamber.
Motor diagnostic
1-Sipper motor 2-Stir motor 3-Turntable
Press [0] to return to the five diagnostic selections.
Select diagnostic
1-Motor 2-Pump 3-Probe 4-I/O 5-Sensor
Press [2] for Pump
to access the Sipper Pump, Calibrator Pump and Buffer Pump.
Pump diagnostic
1-SipperPump 2-Buffer 3-Cal 4-ExtPump
Press [1] for Sipper Pump to begin a sequence of five distinct movements of the plunger rod in
the Sipper Pump. Locate the Sipper Pump, a clear plastic cylindrical body mounted between the
two peristaltic pumps on the fluid wall. See Figure 5.3. Focus on the metal plunger rod inside
this plastic body. Some movements will be brief, so watch closely.
Sipper pump diagnostic
1-Home
Press [1] for Home. You will see a small movement of the plunger, but you will hear a clicking
sound that lasts 3 or 4 seconds as the pump motor oversteps to detect "home".
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