Hach DRB 200 Instrument Manual page 31

1. Disconnect the Model DRB 200 Digital Reactor Block from it's
power source to verify that it is or is not the source of the interference.
2. If the Model DRB 200 Digital Reactor Block is connected into the
same outlet as the device with which it is interfering, try another
outlet.
3. Move the DRB 200 Digital Reactor Block away from the device
receiving the interference.
4. Reposition the receiving antenna for the device receiving the
interference.
5. Try combinations of the above.
Certification,
31
continued