2-9
Installation
Figure 2-7. Sensor Wiring Diagram.
MECHANICAL
CONSIDERATIONS
Use the following information when preparing the installation site and
selecting transmitter options.
The transmitter may be mounted directly to or remotely from the
sensor. Using optional mounting brackets, the transmitter may be
mounted to a flat surface or to a two-inch diameter pipe (see Figure 2-8
on page 2-10).
Mounting
The transmitter may require supplementary support under
high-vibration conditions, particularly if used with extensive
thermowell lagging or long extension fittings. Pipe-stand mounting,
using one of the optional mounting brackets, is recommended for use in
high-vibration conditions.
Access Requirements
Take into account the need for access to the transmitter when choosing
an installation location and position.
Housing Rotation
You may rotate the electronics housing up to 90 degrees in either
direction to improve field access to the two compartments.
Terminal Side of Electronics
Housing
Mount the transmitter so the terminal side is accessible. Be sure to
allow adequate clearance for cover removal. Make wiring connections
through the conduit openings on the bottom of the housing.
*
Transmitter must be configured for a 3-wire RTD in order to recognize an RTD with a compensation loop.
** Rosemount provides 4-wire sensors for all single-element RTDs. You can use these RTDs in 3-wire configurations by leaving
the unneeded leads disconnected and insulated with electrical tape.
*** Typical wiring configuration of a Rosemount dual-element RTD is shown (R=Red, W=White, G=Green, B=Black).
Avg. Temp/
D
T/
Hot Backup/Dual Sensor with
2 RTDs**
2-wire RTD
and Ohms**
3-wire RTD
and Ohms**
4-wire RTD
and Ohms
T/Cs and Millivolts
MODEL 3144 SENSOR CONNECTIONS
MODEL 3244MV SENSOR CONNECTIONS
Avg. Temp/
D
T/
Hot Backup/Dual Sensor with
2 thermocouples
Avg. Temp/
D
T/
Hot Backup/Dual Sensor with
RTDs/thermocouples**
Avg. Temp/
D
T/
Hot Backup/Dual Sensor with
RTDs/thermocouples**
2-wire RTD
and Ohms**
3-wire RTD
and Ohms**
4-wire RTD
and Ohms
T/Cs and Millivolts
RTD with
Compensation Loop*
RTD with
Compensation Loop*
Avg. Temp/
∆
T/
Hot Backup/Dual Sensor
with 2 RTDs with
Compensation Loop**
2-wire RTD
and Ohms
2-wire RTD
and Ohms**
3-wire RTD
and Ohms**
2-wire RTD
and Ohms
3-wire RTD
and Ohms**
3144
-0
000E
05A
,
F
0
5
A
,
A
04A
R
W
W & G
G
B
***
