Emerson Rosemount 708 Quick Start Manual page 13

June 2022
Table 4-2: Ambient Temperature Derating - HT01 (continued)
Process temperature
°C
490
460
430
400
370
340
310
280
260
4.1.6 Mounting installation considerations
Procedure
1. Inspect mounting bands periodically and re-tighten if necessary.
Some loosening may occur after initial installation due to thermal
expansion/contraction.
2. Ensure the waveguide is in direct contact with the pipe.
3. Insulate process piping to minimize ambient temperature effects
(see
foot should not exceed 2.54 cm (1 in.).
4. For best results, mount the transmitter within 15.24 cm (6 in.) of the
equipment being monitored.
5. The stainless steel mounting bands could be affected by stress
corrosion and potentially fail when in the presence of chlorides.
6. The transmitter should be installed such that steam or other high
temperature fluids do not directly impinge the housing of the device.
7. If installing the device on a steam trap, the device should be installed
on the upstream side of the trap.
4.2 Mounting
For high temperature mounting, see
application.
Quick Start Guide
°F
914
860
806
752
698
644
590
536
500
Figure 4-8). Insulation thickness over the top of the waveguide
Max ambient
°C
47
49
51
53
56
58
60
62
63
Mounting in a high temperature
Quick Start Guide
°F
117
120
124
127
133
136
140
144
145
13