Emerson Rosemount 644 Quick Start Manual page 16

Quick Start Guide
Figure 3-3: Alarm Switch Placement
Note
If using an LCD display, remove the display by detaching it from the
top of the device, set the switch to the desired position, reattach the
LCD display, and reattach the housing cover.
Enclosure
Enclosure covers must be fully engaged to meet explosion-proof
requirements.
3.4 Verify configuration
Upon receiving your transmitter, verify its configuration using any HART
compliant configuration tool. See the Rosemount 644
configuration instructions using AMS Device Manager.
The transmitter communicates using the Field Communicator
(communication requires a loop resistance between 250 and 1100 ohms).
Do not operate when power is below 12 Vdc at the transmitter terminal. See
the Field Communicator
3.4.1 Verify configuration with a Field Communicator
To verify configuration, you must install a Rosemount 644 DD (Device
Descriptor) on the Field Communicator.
Fast Key sequences for the latest DD are shown in
sequences using legacy DD's, contact your local Emerson representative.
Perform the following steps to determine if an upgrade is required.
16
Rosemount 644 Transmitter
A. Alarm switch
WARNING
Reference Manual
Rosemount 644 Field Mount
A
Reference Manual
for more information.
Table 3-1. For Fast Key
April 2021
®
-
for
Rosemount 644