Sensoray 7429 - Manual (Page 28)

Activate 50 Hz Rejection Filter
This command will cause the 7429 to reject 50 Hertz differential noise on all channels.
Upon power-up reset, the 7429 will default to 60 Hertz rejection for all channels. This
command should only be used in systems targeted for 50 Hertz power environments.
COMMAND: (128)
RESPONSE: NONE