Campbell Scientific CS475, CS476, and CS477 Radar Water Level Sensor - Manual (Page 33)

CS475, CS476, and CS477 Radar Water Level Sensor
8.2 Diagnostics and Repair
The radar sensor is extremely reliable, but problems can occur during
operation. Most of these problems are caused by the following:
• Sensor
• Environmental conditions
• Power supply
• Signal processing
When you encounter a problem with the radar sensor, check the error messages
from the aM!, followed by the aD0! command to help evaluate the issue.
1. During the initial power up or resumption of supply voltage to
the sensor, some SDI-12 commands, such as the I command, will
not yield the expected responses. NOTES
2. A typical response to the aD0! command results in a response
of 108003 where approximately 80 seconds is the required time
to complete the BIST (Built In Self Test) of the instrument.
After power up is complete, normal SDI-12 communication
starts.
8.2.1 No Measured Value Available — Error E013
If you are unable to find a measured value, check the following:
• Sensor in boot phase
• Update the Start False Echo Learn (aXSFEL).
8.2.2 No Measured Value Available — Error E041, E042, E043
If you have a hardware error or have defective electronics, try cycling the
power to the sensor. If the sensor recovers, no further steps are required. If the
sensor does not recover, do one of the following:
• Exchange the electronics module (see Section 8.2.2.1, Exchange
Electronics Module)
• Return the equipment for repair (an RMA number is required)
8.2.2.1 Exchange Electronics Module
If you do not have an electronics module onsite, order one from Campbell
Scientific.
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