Installation In Non-Metallic Tanks And Open-Air Applications - Emerson Rosemount 3308A Reference Manual

Reference Manual
00809-0100-4308, Rev CA
3.3.3

Installation in non-metallic tanks and open-air applications

Avoid major sources of electrical disturbance in proximity of the installation, e.g. electrical motors,
stirrers, servo mechanisms.
Figure 3-4. Avoid Electromagnetic Disturbances
For clean liquids, use a coaxial probe to reduce effect of potential electrical disturbances.
Figure 3-5. Coaxial Probe in an Open-Air Application
For optimal single lead probe performance in non-metallic tanks, the probe must be mounted with a
metal flange, or screwed in to a metal sheet (d > 14 in./350 mm) if a threaded version is used.
Figure 3-6. Mounting in Non-Metallic Tanks
Metal flange
Installation
PRELIMINARY
Metal sheet
(d > 14 in./350 mm)
Installation
August 2017
19