Omega DFG-RSA User Manual
Model DFG-RSA
Configurable Load Cell Adapter
Model DFG-RSA Configurable Load Cell Adapter User’s Guide
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Model DFG-RSA Configurable Load Cell Adapter User’s Guide
Thank you…
Thank you for purchasing an Omega Model DFG-RSA adapter and software, used to connect common
strain gage-based load cells, force sensors, and torque sensors to Omega models DFG-RS5 and DFGRS3 indicators.
With proper usage, we are confident that you will get many years of great service with this product.
Omega instruments are ruggedly built for many years of service in laboratory and industrial environments.
This User’s Guide provides setup, safety, and operation instructions. For additional information or
answers to your questions, please do not hesitate to contact us. Our technical support and engineering
teams are eager to assist you.
Before use, each person who is to use this product should be fully trained in appropriate
operation and safety procedures.
TABLE OF CONTENTS
OVERVIEW .........................................................3
MECHANICAL SETUP .......................................3
SOFTWARE INSTALLATION ............................5
USING THE SOFTWARE ...................................6
CAPACITIES & RESOLUTIONS ........................9
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Model DFG-RSA Configurable Load Cell Adapter User’s Guide
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 softwa re
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:
EXCITATION +
EXCITATION –
SIGNAL +
SIGNAL –
These leads are typically color coded. Refer to the sensor’s data sheet for details.
Ensure that the signal leads have been installed into the appropriate terminal blocks. Some sensor
Note:
manufacturers consider SIGNAL + 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:
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Model DFG-RSA Configurable Load Cell Adapter User’s Guide
The screw terminal block will be visible, along with labels referencing the functions listed above:
2. Feed the four leads through the supplied strain relief (pictured above) and into the body of the
adapter.
3. Using a flat screwdriver, loosen the four screws in the terminal block until the sensor leads can be
inserted into the appropriate receptacles. After insertion of the leads, tighten the screws, as
shown in the image below:
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