OsmoPRO® Multi-Sample Micro-Osmometer User’s Guide
62
8.1.1 Performing an A/D test
To perform an A/D test, select a set point temperature from the drop-down menu.
After selecting a temperature, the turntable rotates to the home position, the sample and block
motors engage, and the testing process begins. The reading section shows the sample and
block probe readings in ohms and °C and the power level as a percentage. After 5 minutes, the
block temperature should roughly equal the set point temperature.
8.1.2 Fixed resistance
Selecting the option Fixed Resistance switches the test to run with known resistors. This
bypasses the cooling circuitry to verify the A/D is operating correctly.
When testing is performed in this mode, the readings should be 6200 ohms ±50 ohms. If the
readings are outside this range, it may point to issues with the A/D. Refer to the troubleshooting
section or contact Advanced Instruments Hot-Line Technical Service.
8.2 Motors
From the
Diagnostics
screen, press
MOTORS
to enter the
Motor Test
screen (Figure 8.3).
This screen allows the user to test the functionality of the systems 3 motors. Each motor can be
moved individually by the user.
Figure 8.3: Motor Test Screen
The turntable can be moved into various positions based on the user input. Use this screen to
diagnose possible motor issues and alignment issues. Press
EXIT
to return to the
Diagnostics
screen.
8.2.1 Sample/block
The sample and block motors can be tested in this section.
• Press
ENGAGE
to engage BOTH the sample motor and the block motor.
• Once the motors engage,
ENGAGE
toggles to
DISENGAGE
. Press
DISENGAGE
to
disengage both motors.
• For the sample motor only, press the down arrow on the screen to move the sample to
the engaged position. Press the down arrow to move the sample motor to the home
position.
