Configure (Bench Calibration) - Emerson Rosemount 644H Quick Start Manual

April 2019
1

Configure (bench calibration)

The Rosemount
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
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
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
A. 250Ω ≤ R
B. AMS
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).
communicator software to access new XMTR
functions. Continue with old description?
Quick Start Guide
™
644 communicates using the Field Communicator.
Reference Manual
for more information.
B
≤ 1100Ω
L
™
Device Manager
and the Field Communicator
™
644 DD revisions.
Rosemount 644 rail mount
A
Quick Start Guide
Upgrade the
5