AI-1000 Load Cell Interface with Analog Output

The AI-1000 Load Cell Signal Conditioner amplifies the low level signal (mV/V) from a load cell into a 0-5 V DC signal and makes it easy to connect it to a Programmable Logic Controller (PLC) or a Data Acquisition System (DAQ).

Highlights

Many applications require force or weight information to be input into a PLC in order to turn on/off a valve or set off an alarm etc. The AI-1000 Signal Conditioner is a single channel interface designed to provide a 0 to 5 V DC output proportional to applied loads into a PLC or into a Data Acquisition System to capture and record data for an experiment.

Key Features of the AI-1000 Analog Load Cell Interface:

  • Works with 4-wire load cells with E+, E-, S+, S- pins
  • Comes with a power supply
  • Amplifies tiny millivolt signals such as those from strain gauges arranged in a Wheatstone bridge configuration
  • Outputs as large a span as possible in the  (0.5  to 4.5 VDC) range using potentiometers to adjust the offset and scale
  • Typical noise level is +/- 1 mV with a span of around 4V (4000 mV)
  • Has an external terminal block to easily attach a mV/V device like a load cell or torque sensor 
  • 1 Khz noise filter cuts off higher frequencies. This can be adjusted upon request.

When purchasing the AI-1000 or AI-1000-CV please select and add an analog calibration option in compression, tension or both. In compression or in tension the voltage is adjusted to fall appoximately between 0.5 to 4.5V DC or as large a span as practical. For universal mode, the zero level force is set to 2.5 VDC approx. In one direction the voltage goes from 2.5CV to 4.5 VDC and in another direction it goes from 2.5V DC to 0.5V DC. An example of a typical calibration sheet can be seen here.

Analog Load Cell Interface Options

AI-1000 Analog Interface

AI-1000

Outputs 0-5 V DC Signal
Single Channel

AI-1000-CV

AI-1000CV

Outputs 0-5 VDC and/or 4-20 mA Signal
Single Channel

Analog Load Cell Configuration

Some users want a high level 0-5V analog DC output in order to work with existing data acquisition systems or PLCs. In that case, you can use this load cell with our AI-1000 Load Cell interface which provides an amplified 0.5 to 4.5V output proportional to the applied loads. We can provide the system together with calibration and the formula to convert from voltage to loads/forces when ordered in this configuration. We also offer the AI-1000-CV with 4-20 mA output if you prefer current output. Please contact us for this kit.

RAS1 S-Beam Digital Load Cell with Analog Output to Connect to PLC and DAQ
Kit Includes:


RAS1 S-Beam Load Cell
AI-1000 Analog Load Cell Interface
Add Calibration
Add Accessories

RSB2 Button Digital Load Cell with Analog Output to Connect to PLC and DAQ
Kit Includes:


RSB2 Button Load Cell
AI-1000 Analog Load Cell Interface
Add Calibration
Add Accessories

RAPG Single Point Digital Load Cell with Analog Output to Connect to PLC and DAQ
Kit Includes:


RAPG Single Point Load Cell
AI-1000 Analog Load Cell Interface
Add Calibration
Add Accessories

Downloads

Register on our site and download the Spec-sheets and Solid Models for AI-1000.

Spec-sheets
Spec-sheets

Download Technical Specifications

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Documents
Documents

Download User Guides

Download
Solid Models
Solid Models

Download Solid Models

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Watch and Learn

Calibrate & Use AI-1000 Analog Signal Conditioner with your Resistive Load Cell

Using Load Cells with Analog Output & Connecting with PLCs

What is the accuracy offered by the AI-1000?

The AI-1000 offers a span of 4V (4000 mv) from approx. 0.5V to 4.5V DC with a noise of +/- 1 mv or less. This offers a resolution of +/- 0.025% of full scale and easily provides accuracies of the order of +/- 0.1% accuracy of full scale or better.

What are the inputs/outputs from the AI-1000?

The AI-1000 can connect with four wire resistive load cells (mV/V) made using strain gauges in bridge configurations (half bridge, full bridge). The connection is made via a terminal block. The output is typically a DC voltage that ranges between 0.5 V to 4.5V.

How many load cells can it work with?

The AI-1000 can only be connected with one load cell at a time. You MUST mate the AI-1000 with a load cell and calibrate it before using it. The calibration is performed by setting the R1 and R2 resistors on the front of the AI-1000. The load cell and AI-1000 must be used together as a pair. If you want to use it with another load cell then you MUST recalibrate the new pair prior to use.

Does it need a power supply?

Yes. You need to power the AI-1000 with a 8-24 V power supply. We include this power supply with your unit and it usually comes pre-connected and ready to use if purchased as a kit with a calibration service.

How is the AI-1000 different from the AI-1000-CV?

The AI-1000 offers DC voltage output proportional to the applied force/torque. Teh AI-1000-CV offers either a 0-5 V DC voltage output or a 4-20 mA current output or both. You just have to select and add the appropriate calibrations to your order.

How far can the output be from the PLC or DAQ?

In any circuit, the farther the signal has to travel over a conducting wire, the greater the drop of the voltage due to the inherent resistance of the cable. We recommend that you keep the distance between the AI-1000 and your PLC or DAQ under 6 feet. If you need to be farther away than that, then consider using the AI-1000-CV with current output or the digital USB or wireless versions of the interface.

Can you connect the AI-1000 to an LCD Display?

We do not offer such a display at the present time. But you can buy an LCD panel meter from other vendors and program it to display the output voltage converted into a force value. We offer several digital interfaces with USB or BLE output that can connect with our DS-3000-Pro-1 Single Channel or the DS-3000-Pro-4 Four Channel Touch Screen LCD displays.

Do you offer calibration service?

Yes. We offer calibration service on new sensor purchases as well as recalibration service for previously purchased sensors. We use NIST traceable reference standards to perform and validate the calibration and provide a free calibration certificate as part of the service. We are NOT ISO certified.

How can I get pricing information?

You can register on our website, login and see all prices, download spec sheets and solid models. You can also send us an email with your contact information and shipping address and we will be happy to send you a formal quote.

What is your return policy?

We give you a 30 day guiarantee for you purchase. You can exchange or return your purchased products for a refund of the purchase price of the product. Any calibration service fees, shipping and payment fees cannot be refunded. Feel free to try out our products risk free and see for yourself how easy we make it for you!

What is the typical lead time?

We need between one and two weeks usually to ship your order for items in stock. This is because we have to make your sensor, interface and calibrate them together, make sure the quality meets all specs and then pack and ship it to you. We offer expedited processing options if you are in a rush and need to get sensors sooner. If out of stock or if sensors are needed in volume, we could take 4-6 weeks or longer. Please contact us to get an estimate of price and lead time for your particular needs.

Do you offer educational discount?

We believe teaching young kids and encouraging R&D is crucial to make this world a better place. We support teaching and research activities in educational institutions with a 10% education discount on purchased products in exchange for sharing write ups, pictures, video clips and other material we can use in our marketing materials on and off line.

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