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Chapter 3. Using Your APS3
3.28
Reporting APS System Events
Specific APS system events are reported to ParticleSpectrum when they are encountered by
the APS device. For example, an event can include a low battery or a laser failure and can stop
particle measurement. The events described in this section include the following:
• Low battery
• Laser failure
• Low pressure environment
The following information lists these events and the resulting ParticleSpectrum behavior when
the event is reported by the APS device.
Low Battery
When the battery charge decreases to the point that there is not enough power to drive the laser
and fan, ParticleSpectrum is unable to perform meaningful measurements, resulting in one of
the following events depending on the current state of the APS device.
• Purging. If a low battery condition arises while the sensor is purging,
ParticleSpectrum displays a warning dialog and aborts the measurement.
• Measuring. If a low battery condition arises when the sensor is actively measuring,
ParticleSpectrum shuts off the fan and laser, inserts a data mark in the log file, saves
the log file contents, and stops the measurement.
To correct this problem recharge the sensor battery as described in Charging the Battery.
Laser Failure
In the unlikely occurrence of a laser failure, ParticleSpectrum is unable to perform meaningful
measurements, resulting in one of the following events depending on the current state of the
APS device.
• Purging. If a laser failure occurs when the sensor is purging, ParticleSpectrum displays
a warning dialog and aborts the measurement.
• Measuring. If a laser failure occurs while the sensor is actively measuring,
ParticleSpectrum turns off the fan and laser, inserts a data mark in the log file, saves
the log file contents, and stops the measurement.
If a laser failure occurs, the APS device needs to be serviced. Do not attempt to operate it again
until it is serviced. For information on sending the APS wafer to CyberOptics for servicing,
refer to page 5.3 in Chapter 5.