67
Reference Manual
00809-0100-4803, Rev GA
Installation
September 2017
Installation
3.3 Installation considerations
3.3.1 General
Measurement performance depends upon proper installation of the transmitter, impulse piping, and
process temperature sensor. Mount the transmitter close to the process and use minimum piping to
achieve best performance. Also, consider the need for easy access, personnel safety, practical field
calibration, and a suitable transmitter environment. Install the transmitter to minimize vibration, shock,
and temperature fluctuation.
Note
Install the enclosed pipe plug (found in the box) in the unused conduit opening if optional process
temperature input is not used. For proper straight and tapered thread engagement requirements, see
the appropriate approvals drawings in Appendix B: Product Certifications.
For material compatibility considerations, see Material Selection Technical Note.
3.3.2 Mechanical
For steam service or for applications with process temperatures greater than the limits of the
transmitter, do not blow down impulse piping through the transmitter. Flush lines with the blocking
valves closed and refill lines with water before resuming measurement.
When the transmitter is mounted on its side, position the coplanar flange to ensure proper venting or
draining. Mount the flange as shown in Figure 3-5 on page 72, keeping drain/vent connections on the
bottom for gas service and on the top for liquid service.
3.3.3 Environmental
Access requirements and “Cover installation” on page 69 can help optimize transmitter performance.
Mount the transmitter to minimize ambient temperature changes, vibration, mechanical shock, and to
avoid external contact with corrosive materials. “Specifications and Reference Data” on page 125 lists
temperature operating limits.
3.4 Installation procedures
3.4.1 Configure security (write protect)
Changes to the transmitter configuration data can be prevented with the security (write protect) switch
located on the feature board. See Figure 3-1 on page 68 for the location of the switch. Position the
switch in the ON position to prevent accidental or deliberate change of configuration data.
If the transmitter write protection switch is in the ON position, the transmitter will not accept any
“writes” to its memory. Configuration changes, such as digital trim and reranging, cannot take place
when the transmitter security is on.
To reposition the switches, follow the procedure described below:
1. Do not remove the transmitter covers in explosive atmospheres when the circuit is live. If the
transmitter is live, set the loop to manual and remove power.
2. Remove the housing cover opposite the field terminal side of the housing.
3. To reposition the switches as desired, slide the security and alarm switches into the preferred position
using a small screwdriver. See Figure 3-1 on page 68.
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