Emerson Rosemount 6888A, Reference Manual

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2.3.4 Transmitter probe with integral autocal and HART
communications
This probe contains gas-switching solenoids so that the Rosemount 6888Xi Electronics can
control the introduction of calibration gases. Calibrations can be initiated via a calibration
recommended diagnostic, time since last calibration, manually via external dry contact,
HART communications, or from the Rosemount 6888Xi local operator interface keypad.
The integral autocal feature can only be implemented when the probe is used with a
Rosemount 6888Xi.
1.
Remove the two covers from the transmitter.
2. Connect the line (L1 wire) to the L1 terminal, the neutral (L2) wire to the L2/N
terminal, and the ground wire to the ground lug.
The Rosemount 6888A accepts 120/240 Vac ±10%, 50/60 Hz. No setup is required.
3. Connect the 4-20 mA signal wires form the Rosemount 6888Xi to the connections in
the side chamber of the transmitter.
Do not connect the signal wires to the terminals in the main chamber where the AC
input wires are connected. Use a shielded twisted wire pair. Do not allow bare shield
wires to contact the circuit boards. Insulate the shield wires prior to termination. The
24 Vdc loop power is sourced from the Rosemount 6888Xi.
4. Terminate the shield at both the probe and the Rosemount 6888Xi Advanced
Electronics.
NOTICE
The 4-20 mA signal represents the O
2
value and also powers the probe-mounted
electronics. Superimposed on the 4-20 mA signal is HART information accessible
through a field communicator or AMS software.
5. Reinstall both covers on transmitter.
6. Follow the remaining electrical installation instructions for the Rosemount 6888Xi
included with your system configuration.
See Table 2-4 for the Rosemount 6888Xi product matrix.
Install
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