SONOPLOT MICROPLOTTER Proto, Manual

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If the impedance scan is a series of noisy peaks between 0 and 20 ohms, the dispenser is
short-circuited. At this time, the only solution is to replace the dispenser.
NOTE: A short circuit is possible if you have been working with a metallic ink, and the ink has
formed bridge across both sides of the piezoelectric element (the gray rectangle to which the
glass capillary is attached). Try carefully cleaning the piezoelectric with an appropriate solvent
for your ink. Be careful to avoid damaging the tip during cleaning.
The dispenser does not accurately locate the surface when using the Find
Surface command
The dispenser may be miscalibrated. Move the dispenser so that it is clear of the surface and
select the
Calibrate dispenser toolbar item. This should bring up the calibration dialog, as
described in Chapter 4. Click on
Calibrate
to begin the calibration process.
To verify that the surface sensor is functioning correctly, you can bring up the sensor diagnostics
dialog by choosing the
Dispenser | Show Diagnostics menu item (as described in
Chapter4). This window displays the realtime readout from the surface sensor. A red line
indicates the sensor threshold for when the software will register contact with the surface. When
the dispenser is above the surface, the signal should be below this line. Upon contact with the
surface, the signal should jump above this threshold. If it does not, and recalibrating the
dispenser does not help, the dispenser itself may have a physical problem and may need to be
replaced.
When a move command is given, the positioner does not move and the
positioning controls stop responding
The positioner is not connected to the control electronics. Ensure the communication cables
between the control electronics and the positioner are plugged in at both ends.
The camera view appears as a white square
The CCD camera is not communicating with SonoGuide, most likely because it is not plugged
in. Ensure that the USB cable is connected to a USB port on the back of the computer, as well
as plugged into the camera. If it is, reseat the cable. Restart SonoGuide.
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