Synapse Biomedical TransAeris Manuel De L'utilisateur page 59

"LOW BATTERY" indicating the TransAeris is approaching the end of its service life.
"KEYPAD ERROR" indicating a failure when the control buttons are non-responsive.
"DATA ERROR!" and "SYSTEM ERROR!" indicating a failure with the programmed
data or firmware.
After the self-test completes successfully, press the Unlock button and "1", then the
TransAeris will display stimulus status.
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