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P*994 Transducer Test
If you enter 1 for this parameter it will continually fire the transducers, so
you can check the wiring, until you press any key to cancel.
P*995 Keys Test
You should press each key, to confirm it works, with a counter showing how
many more keys you have to press. Press the CANCEL key last, as this will
confirm if all keys were pressed or not. If they were not, then an error
message is displayed.