Check RS-232 connection

Verify the RS-232 cable is connected to both the data logger RS-232 port and the TX325. Check the cable for corrosion, frayed wires, and good contact with the ports on the two devices. RS-232 cables occasionally wear out without visible signs of failure. Keep a spare RS-232 cable for troubleshooting RS-232 connections.

Campbell Scientific offers three RS-232 cables that support different data loggers or wiring configurations. Refer to Cable options, data logger compatibility, and data logger connections for the cable descriptions, compatible data loggers, and the data logger connections.