51
Reference Manual
00809-0200-4728, Rev SA
Installation
July 2018
Installation
Rail mount transmitter with threaded sensor
1. Attach the transmitter to a suitable rail or panel.
2. Attach the thermowell to the pipe or process container wall. Install and tighten the thermowell
before applying pressure.
3. Attach necessary extension nipples and adapters. Seal the nipple and adapter threads with thread
sealant.
4. Screw the sensor into the thermowell. Install drain seals if required for severe environments or to
satisfy code requirements.
5. Screw the connection head to the sensor.
6. Attach the sensor lead wires to the connection head terminals.
7. Attach additional sensor lead wires from the connection head to the transmitter.
8. Attach and tighten the connection head cover. Enclosure covers must be fully engaged to meet
explosion-proof requirements.
9. Set the transmitter failure mode switch.
10. Attach the sensor wires to the transmitter.
3.4.4 Multichannel installations
In a HART installation, several transmitters can be connected to a single master power supply, as shown
in Figure 3-6. In this case, the system may be grounded only at the negative power supply terminal. In
multichannel installations where several transmitters depend on one power supply and the loss of all
transmitters would cause operational problems, consider an uninterrupted power supply or a back-up
battery. The diodes shown in Figure 3-6 prevent unwanted charging or discharging of the
back-up battery.
A. Rail mount transmitter
B. Threaded sensor connection head
C. Standard extension
D. Threaded style sensor
E. Threaded thermowell
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