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Rosemount 1199
DIRECT MOUNT OPERATING LIMITS
Temperature: A direct mount seal system protects
the transmitter from process temperatures while
maintaining the seal system fill fluid within its
operating temperature limits. Pressure transmitter
ambient limits are based on its electronics (typically
-40° to 185°F/85°C) and process temperature limits
are based on the module configuration (typically -40°
to 250°F/121°C for Coplanar flanges or in-line
connections).
The seal system fill fluid is selected to operate within
the process and ambient temperature limits for an
application. For direct mount systems, heat
transferred from the process keeps the fill fluid &
direct mount connection warm. This enables the fill
fluid to continue to respond properly even at cold
ambient conditions. An example is the Thermal
Optimizer In-line code D5 designed for high process
temperature applications. The Thermal Optimizer
separates the In-line sensor module from the high
process temperature while insulating the high
temperature fill fluid to enable it to operate properly
even at the coldest ambient conditions. In capillary
seal systems, the process heat is dissipated and
most of the fill fluid is exposed to the ambient
temperature. At cold ambient temperatures, high
temperature fluids like DC704 or DC705 become too
viscous to provide acceptable time response.
The tables below highlight temperature limits for the
variety of 1199 fill fluids in direct mount or capillary
seal system configurations.
Coplanar Transmitter Seal System Fill Fluid Limits
Direct Mount
Fill Fluid
Minimum
Temperature
DC200
-45 °C/
-49 °F
DC704
-40 °C/F
DC705
-40 °C/F
Inert
-45 °C/
(Halocarbon)
-49 °F
Glycerine
-15 °C/
and Water
5 °F
Propylene
-15 °C/
Glycol and
5 °F
Water
Neobee
-15 °C/
M-20
5 °F
Syltherm XLT -75 °C/
-102 °F
2
Maximum Temperature
LT/0 ext. 2-in./
4-in./
50 mm ext.
100 mm ext.
205 °C/
401 °F
240 °C/
260 °C/
464 °F
500 °F
240 °C/
260 °C/
464 °F
500 °F
160 °C/
320 °F
95 °C/
203 °F
95 °C/
203 °F
205 °C/
225 °C/
401 °F
437 °F
145 °C/
293 °F
In-line Transmitter Seal System Fill Fluid Limits
Fill Fluid
Minimum
Temperature
DC200
-45 °C/-49 °F
DC704
-40 °C/F
DC705
-40 °C/F
Inert
-45 °C/-49 °F
(Halocarbon)
Glycerine and
-15 °C/5 °F
Water
Propylene
-15 °C/5 °F
Glycol and
Water
Neobee M-20
-15 °C/5 °F
Syltherm XLT
-75 °C/-102 °F
Capillary Seal System Fill Fluid Limits
Fill Fluid
Minimum Temperature
DC200
-45 °C/-49 °F
DC704
0 °C/32 °F
DC705
20 °C/68 °F
Inert (Halocarbon)
-45 °C/-49 °F
Glycerine and Water
-15 °C/5 °F
Propylene Glycol and
-15 °C/5 °F
Water
Neobee M-20
-15 °C/5 °F
Syltherm XLT
-75 °C/-102 °F
Pressure: The operating pressure limits for a direct
mount seal system depend on the process
connection and/or sensor URL for the maximum limit
and the sensor static pressure limit and remote seal
construction for the minimum limit. For example, the
maximum limit for a FFW seal with an ANSI class
150 SST flange would be 285 psig(19.6 bar). The
maximum limit for a gage Coplanar range 4 the URL
would be 300 psig(20.7 bar). The maximum limit
would be the lower of these values for a given seal
system. For minimum pressure, the sensor limit
depends on module and sensor type as shown
below.
Module Type Sensor Type
Coplanar
Differential
Gage
Absolute
In-line
Gage
Absolute
Technical Note
00840-0700-4016, Rev AA
February 2009
Maximum Temperature
1-in. (25 mm)
5.72-in. (145 mm)
205 °C/401 °F
315 °C/599 °F
350 °C/662 °F
160 °C/320 °F
95 °C/203 °F
95 °C/203 °F
205 °C/401 °F
225 °C/437 °F
145 °C/293 °F
Maximum
Temperature
205 °C/401 °F
315 °C/599 °F
350 °C/662 °F
160 °C/320 °F
95 °C/203 °F
95 °C/203 °F
225 °C/437 °F
145 °C/293 °F
Lower Pressure Limit
LRL or 0.5 psia (34.5 mbar abs)
LRL or 0.5 psia (34.5 mbar abs)
0 psia (0 bar)
-14.7 psig (-1.01 bar)
0 psia (0 bar)
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