User manual

6.2.2 Troubleshooting
Follow the steps below if the potentiometer is not measuring correctly::
• Verify that the power amplifier is functional. For example when using the Quanser VoltPAQ device, is the
green LED lit? Recall the analog sensor signal go through the amplifier before going to the data-acquisition
device (except when using the Q3 ControlPAQ). Therefore the amplifier needs to be turned on to read the
potentiometer.
• Check that the data-acquisition board is functional, e.g. ensure it is properly connected, that the fuse is not
burnt.
• Measure the voltage across the potentiometer. Ensure the potentiometer is powered with a ±12 V at the 6-pin-
mini DIN connector and ±5 V at the potentiometer terminals, as described in Section 2.2.2. If the voltage from
the wiper does not change when you rotate the potentiometer shaft, your potentiometer needs to be replaced.
Please see Section 7 for information on contacting Quanser for technical support.
6.3 Tachometer
6.3.1 Testing
Test the tachometer on the SRV02 by performing the following:
1. Apply a 2.0 V signal to Analog Output Channel #0 in order to drive the motor.
2. Measure Analog Input Channel #2 to read the tachometer. When applying 2.0 V to the motor, the tachometer
should be measuring a value of approximately 3.0 V.
6.3.2 Troubleshooting
If no signals are received from the tachometer, go through this method:
• Verify that the power amplifier is functional. For example when using the Quanser VoltPAQ device, is the green
LED lit? Recall the analog sensor signal go through the amplifier before going to the data-acquisition device
(except when using the Q3 ControlPAQ). It needs to be turned on to read from the tachometer.
• Check that the data-acquisition board is functional, e.g. ensure it is properly connected, that the fuse is not
burnt.
• Measure the voltage across the tachometer. When moving the load gear back and forth, is the voltage being
measured changing? If not, then the tachometer needs to be replaced. Please see Section 7 for information
on contacting Quanser for technical support.
6.4 Encoder
6.4.1 Testing
Follow this procedure to test the SRV02 encoder:
1. Measure Encoder Input Channel #0 using, for instance, the QUARC software.
SRV02 User Manual
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