1 Configure (bench calibration)
The Rosemount
™
644 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. Refer
to the Rosemount 644 Reference Manual and the Field Communicator
Reference Manual for more information.
1.1 Update the field communicator software
The Field Communicator field device revision Dev v6, Device Dashboard
(DD) v1 or higher is required for complete functionality. The device will
communicate with all previous Rosemount
™
644 DD revisions.
Use this procedure to determine if a software upgrade is required.
Figure 1-1: Connecting a communicator to a bench loop
Rosemount 644 head mount and field
mount
Rosemount 644 rail mount
A. 250Ω ≤ R
L
≤ 1100Ω
B. AMS
™
Device Manager
C. Power supply
D. Field Communicator
Procedure
1. Connect the sensor.
See the wiring diagram on the inside of housing cover.
2. Connect the bench power supply to the power terminals (“+” or “–”).
3. Connect a Field Communicator to the loop across a loop resistor or at
the power/signal terminals on the transmitter.
The following message will appear if the communicator has a
previous version of the device descriptors (DDs). Upgrade the
communicator software to access new XMTR
functions. Continue with old description?
April 2019 Quick Start Guide
Quick Start Guide 5
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