Set The Switches - Emerson Rosemount 2051HT Quick Start Manual

March 2018
Clamping
When installing clamp, follow recommended torque values provided by gasket
manufacturer.
2.2

Set the switches

Set alarm and security switch configuration before installation as shown in
Figure 2.
The alarm switch sets the analog output alarm to high or low.

- Default alarm is high.
The security switch allows (unlocked symbol) or prevents (locked symbol)

any configuration of the transmitter.
- Default security is off (unlocked symbol).
Use the following procedure to change the switch configuration:
1. If the transmitter is installed, secure the loop and remove power.
2. Remove the housing cover opposite the field terminal side. Do not remove
the instrument cover in explosive atmospheres when the circuit is live.
3. Slide the security and alarm switches into the preferred position using a small
screwdriver.
4. Reattach the transmitter cover. It is recommended that the cover be
tightened until there is no gap between the cover and the housing.
The covers must only be capable of being released or removed with the aid
of a tool to comply with applicable ordinary locations requirements.
Figure 2. Transmitter Electronics Board
Without LCD display
A. Alarm
B. Security
1. To maintain transmitter performance, torquing a 1.5-in. Tri-Clamp beyond 50 in-lb is not recommended on pressure
ranges below 20 psi.
(1)
Aluminum
A
B
Polished 316 SST
A
B
With LOI or LCD display
Quick Start Guide
5