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Instruction Manual
D200124X012
Figure 2. Guidelines for Use of Optional Heat Insulator Assembly
AMBIENT TEMPERATURE (_C)
−10
0
10
20
−18
1100
_
800
HEAT INSULATOR
REQUIRED
400
0
NO INSULATOR NECESSARY
−20
−40
USE INSULATOR (CAUTION! IF AMBIENT DEWPOINT IS ABOVE
PROCESS TEMPERATURE, ICE FORMATION MAY CAUSE INSTRUMENT
MALFUNCTION AND REDUCE INSULATOR EFFECTIVENESS.)
0
20
40
60
AMBIENT TEMPERATURE (_F)
STANDARD CONTROLLER OR TRANSMITTER
NOTE:
FOR APPLICATIONS BELOW -29_C (-20_F), BE SURE THE SENSOR MATERIALS OF CONSTRUCTION
ARE APPROPRIATE FOR THE SERVICE TEMPERATURE.
CV6190-E
B1413‐3
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Table 4. Displacer and Torque Tube Materials
Part
Displacer
Displacer Stem, Driver Bearing,
Displacer Rod and Driver
Torque Tube
1. N05500 is not recommended for spring applications above 232_C (450_F). Contact your
Installation
2500 and 2503 controller/transmitters work in combination with 249 displacer‐type sensors. The factory attaches the
controller/transmitter to the sensor, unless it is ordered separately.
If using natural gas as the pneumatic supply medium, natural gas will be used in the pressure connections of the unit
to any connected equipment. The unit will vent natural gas into the surrounding atmosphere.
WARNING
Always wear protective clothing, gloves, and eyewear when performing any installation operations to avoid personal
injury.
Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section in this
instruction manual.
CAUTION
Do not use sealing tape on pneumatic connections. This instrument contains small passages that may become obstructed
by detached sealing tape. Thread sealant paste should be used to seal and lubricate pneumatic threaded connections.
71
30
40
50
60
70
593
500
TOO
400
HOT
300
200
100
−18
−29
−40
80
100
120
140
160
Standard Material
304 Stainless Steel
316 Stainless Steel
(1)
N05500
2500 and 2503 Controllers/Transmitters
−18 −10
0
10
1100
_
_
HEAT INSULATOR
800
REQUIRED
400
NO INSULATOR NECESSARY
0
USE INSULATOR (CAUTION! IF AMBIENT DEWPOINT IS ABOVE PROCESS
TEMPERATURE, ICE FORMATION MAY CAUSE INSTRUMENT MALFUNCTION AND
REDUCE INSULATOR EFFECTIVENESS.)
−20
0
20
40
60
HIGH‐TEMPERATURE CONTROLLER OR TRANSMITTER
316 Stainless Steel, N10276, N04400, Plastic, and Special Alloys
N10276, N04400, other Austenitic Stainless Steels, and Special Alloys
316 Stainless Steel, N06600, N10276
Emerson sales office
or application engineer if temperatures exceeding this limit are required.
AMBIENT TEMPERATURE (_C)
20
30
40
50
60
70
80
100
120
140
160
AMBIENT TEMPERATURE (_F)
Other Materials
June 2017
105
80
90
100
593
500
TOO
_
HOT
400
300
200
100
0
180
200
220
5
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