CiDRA Sonar Process Monitoring System - Manual (Page 27)

20909-01C Rev 04 Page 11-2
11.2.4 Use of DB9 RS232 Connector Interface
This is a diagnostic interface and intended only for short-term
infrequent use. The DB9 RS232 connector may only be used if the
area is known to be free of explosive gas mixtures during the time
immediately prior to, during, and after use of the RS232 interface to
connect to a laptop computer for diagnostic purposes.
11.3 Sensor Head Adjustments
In normal operation there are no adjustments that need to be made at
the sensor head.