Emerson Rosemount 6888C, Instruction Manual

Page: 64 / 88

8.3 Repair
Each of the following procedures details how to remove and replace a specific component
of the Rosemount 6888C.
WARNING
BURNS
Remove the transmitter from the stack for all service activities. Allow the unit to cool and
take it to a clean work area. Failure to comply may cause severe burns.
WARNING
ELECTRIC SHOCK
Disconnect and lock out power before working on any electrical components. There is
voltage up to 240 Vac.
8.3.1 Remove and replace probe
Remove probe
Complete the following steps to remove the probe from the stack.
1. Turn off power to the system.
2. Shut off the calibration gases at the cylinder and the instrument air.
3. Disconnect the calibration gas and instrument air lines from the transmitter.
4. Remove housing cover.
5. Remove all signal and power wiring to the probe.
6. Remove insulation to access the mounting probe.
7. Unbolt the transmitter from the stack and take it to a clean work area.
8. Allow the unit to cool to a comfortable working temperature.
Replace probe
Complete the following steps to replace the probe in the stack.
1. Bolt the transmitter to the stack and install the insulation.
2. Connect all signal and power leads at the probe.
Refer to Install on page 21 for detailed wiring instructions.
3. Connect the calibration gas and instrument air lines to the probe.
4. Install the housing cover.
5. Turn on instrument air.
6. Restore power to the system.
Refer to Power up on page 47.
Maintenance and service Instruction Manual
July 2018 00809-0100-4891
64 6888C