Omega DFG-RSA, User Manual

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Model DFG-RSA Configurable Load Cell Adapter User’s Guide
3
1 OVERVIEW
1.1 List of included items
Qty. Item
1 DFG-RSA adapter
1 Strain relief
1 Resource CD (Adapter Configuration software, USB driver, user’s guides)
1.2 General Overview
The DFG-RSA adapter is designed to interface a user-supplied load cell, force sensor, or torque sensor
with Omega indicators. The adapter may be programmed to the appropriate load capacity with a software
utility through USB or RS-232 connection to the indicator.
All configuration and calibration information is saved within the adapter, allowing for interchangeability
between multiple sensors (including certain standard Omega sensors).
1.3 Compatible Equipment
The DFG-RSA adapter is compatible with load cells and sensors meeting the following specifications:

Type: Full bridge

Resistance: 300 – 1000 ohms

Sensitivity: 1 – 3 mV/V full scale
2 MECHANICAL SETUP
Sensors meeting the above specifications are supplied with a cable with four leads, for the following
functions:
EXCI
EXCITATION –
SIGNAL –
These leads are typically color coded. Refer to the sensor’s data sheet for details.
Note: Ensure that the signal leads have been installed into the appropriate terminal blocks. Some sensor
manufacturers consider to be a compression value, while others consider it to be a tension
value. If these leads are installed incorrectly, the indicator will display the opposite tension/compression
indicator, and calibration cannot take place. Switching the leads will fix the issue. Refer to the indicators’
user’s guides for details.
The DFG-RSA adapter contains a circuit board with a screw terminal block to allow for the connection of
these leads. Refer to the following procedure for setup instructions:
1. Access the circuit board inside the DFG-RSA adapter by loosening two Phillips head screws and
removing the cover, as shown in the image below: