3.1Considerations for ST 3000 Transmitter, Continued

Temperature limits

Table 5 lists the operating temperature limits for the various types of

 

 

transmitters with silicone fill fluids. See transmitter specifications for

 

 

temperature limits of transmitter with alternative fill fluids.

 

Table 5

Operating Temperature Limits (Transmitters with Silicone Fill Fluids)

 

 

 

 

 

 

Transmitter Type and Model

Ambient Temperature

Process Interface Temperature

 

 

 

°C

°F

°C

 

°F

Draft Range

STD110

-40 to 70

-40 to 158

-40 to 70

 

-40 to 158

Differential PressureSTD125

-40 to 85

-40 to 185

-40 to 85

 

-40 to 185

STD120, STD130, STD170

-40 to 93

-40 to 200

-40 to 125

 

-40 to 257

 

STD904, STD924,

 

 

 

 

 

 

STD930, STD974

-40 to 85

-40 to 185

-40 to 125

 

-40 to 257

Gauge Pressure

 

 

 

 

 

 

STG140, STG170, STG180,

 

 

 

 

 

STG14L, STG17L, STG18L

-40 to 93

-40 to 200

-40 to 125

 

-40 to 257

 

 

STG14T

-40 to 93

-40 to 200

-40 to 150 †

 

-40 to 302 †

 

 

STG93P

-15 to 65

5 to 149

-15 to 95 ††

 

5 to 203 ††

 

STG944, STG974

-40 to 85

-40 to 185

-40 to 125

 

-40 to 257

 

STG90L, STG94L,

 

 

 

 

 

 

STG97L, STG98L

-40 to 85

-40 to 185

-40 to 110

 

-40 to 230

Absolute Pressure

STA122

-40 to 93

-40 to 200

See Specification Sheet

 

 

STA140

-40 to 93

-40 to 200

-40 to 80

 

-40 to 176

 

 

STA922

-40 to 85

-40 to 185

See Specification Sheet

 

 

STA940

-40 to 85

-40 to 185

-40 to 80

 

-40 to 176

Flange Mounted

 

 

 

 

 

 

STF128, STF132, STF924,

-40 to 93

-40 to 200

-40 to 175

 

-40 to 350

STF932

 

 

 

Pseudo-Flanged Head

 

 

 

 

 

STF12F, STF13F, STF92F,

-40 to 93

-40 to 200

-40 to 93

 

-40 to 200

STF93F

 

 

 

STF14F

 

 

-40 to 85

-40 to 185

-40 to 85

 

-40 to 185

Gauge Pressure Flange Mount

-40 to 93

-40 to 200

-40 to 150 †

 

-40 to 302 †

STF14T

 

 

 

Remote Diaphragm Seals

 

 

 

 

 

STR12D, STR13D, STR14G,

 

 

 

 

 

 

STR17G, STR14A

See Specification Sheet

See Specification Sheet

 

STR93D, STR94G

-40 to 85

-40 to 185

See Specification Sheet

†Process temperatures above 125 °C (257 °F) require a reduction in the maximum ambient temperature as follows:

Process Temperature

Ambient Temperature Limit

150 °C (302 °F)

50 °C (122 °F)

140 °C (284 °F)

60 °C (140 °F)

125 °C (257 °F)

85 °C (185 °F)

††Process temperatures above 65 °C (149 °F) require a 1:1 reduction in maximum ambient temperature. NOTE: For transmitters with local meter option see Table A-2.

NOTE: Transmitters with other fill fluids (CTFE, Neobee, Etc.) have different Operating Temperature Limits. For more specific information, refer to the appropriate Specification and Model Selection Guide or transmitter nameplate

18

ST 3000 Release 300 Installation Guide

2/05