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Reference Manual
00809-0100-4444, Rev AC
Section 8: Maintenance
January 2015
Maintenance
8.3 Installing a Local Operator Interface (LOI)
Figure 8-1. Installing a Local Operator Interface (LOI)
1. If the transmitter is installed in a control loop, secure the loop.
2. Remove power from the transmitter.
3. Remove the cover on the electronics compartment of the transmitter housing. If the
cover has a cover jam screw, loosen it before removing the cover. See “Cover jam screw”
on page 35 for details on the cover jam screw.
4. On the electronics stack, locate the serial connection labeled “DISPLAY”. See Figure
8-1.
5. Plug the serial connector from the back of the LOI into the receptacle on the electronics
stack. The LOI can be rotated in 90 degree increments to provide the best viewing
position. Rotate the LOI to the desired orientation, taking care to not exceed 360
degrees of rotation. Exceeding 360 degrees of rotation could damage the LOI cable
and/or connector.
6. Once the serial connector is installed on the electronics stack, and the LOI is oriented in
the desired position, tighten the three mounting screws.
7. Install the extended cover with the glass viewing pane and tighten to metal-to-metal
contact. If the cover has a cover jam screw, this must be tightened to comply with
installation requirements. Return power to the transmitter and verify that it is
functioning correctly and reporting the expected flow rate.
8. If installed in a control loop, return the loop to automatic control.