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Similarly if channel 2 is to be set up, then by writing a ‘1’ to G2 and O2, the
new values set into BFM 23 and 24 w ill be now be transferred to t he
memory location for channel 2 within the EEPROM.
Note: The offset and gain values for each channel can only be set in steps of 5 mV or
20 mA.
34.21 Detecting an open circuit
If any channel is setup to convert an input current, and if it is essential that a disconnec-
tion be detected, then the range 20 mA to þ20 mA range must be selected and not the
4 mA to 20 mA range. This is because