Emerson Rosemount 1199, Reference Manual, Page: 21 / 104

2.10.1 Thermal optimizer limitations
Figure 2-10 shows the process and ambient temperature limits for the thermal optimizer
with Silicone 704 and Silicone 705 Fill Fluids respectively. The shaded areas represent the
temperature limitations; applications outside of the shaded area cannot be used with a
thermal optimizer.
For example, an application with an ambient temperature of 50 °F (10 °C) and a process
temperature of 300 °F (149 °C) is within the limits, a thermal optimizer can be used in this
application.
However, an application with an ambient temperature of 122 °F (50 °C) and a process
temperature of 464 °F (240 °C) is outside of the limits. These high temperatures would be
detrimental to the transmitter electronics.
Reference Manual Remote Seal Systems
00809-0100-4002 May 2020
Rosemount DP Level 21