Accelerometer Calibration

How to calibrate your accelerometer using a portable vibration calibration shaker.


Calibrating accelerometers and other transducers is quick and easy with the AT-2030 and AT-2040. If your operating in a environment with a large amount of sensors, it makes financial sense to do the calibrating yourself rather than send your accelerometers to a lab or the manufacturer for calibration. On average, the calibration cost can be anywhere from $100-$200 per accelerometer yearly. It’s easy to see how calibration expenses add up very quickly. Operators will also find that by using a portable vibration calibrator, their machine downtime is greatly reduced. The process of mailing your sensors to and from a calibration lab can be eliminated and what used to take weeks can now take minutes.

Before you get started.


  • Make sure that your portable vibration calibrator is fully charged. The AT-2030 and AT-2040 both have a auto shutdown feature to protect the battery. Keeping the calibration shaker charged ensures that it will not unexpectedly power down on you.

 

  • Make sure your external meter is working correctly (AT-2030 Only). When using the AT-2030 a meter is required to read the measurements. It’s important that your meter be correctly calibrated and have working batteries. If using AT-2040 skip this step; sensitivity and calibration readings are built in to the unit.

at2030_meter

 

 

 

 

  • Make sure you have the correct adapters. AT-2030 and AT-2040 calibrators each come with 6 mounting adapters, a mounting pad, and a mounting plate. This is enough to most jobs, but make sure to check that you will not be needing a less common adapter. Our reference accelerometer thread size is 1/4-28.

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Now you’re ready to start calibrating.


Follow these simple steps and you will have your accelerometers calibrated in no time.

1) Using the provided short hand accelerometer wrench, secure the reference accelerometer from movement. The shaker and reference accelerometer are connected by four carbon fiber flexures. Use the wrench to ensure that torque is not applied to these parts when tightening down your test accelerometer.

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2) Connect your cable from the accelerometer under test. If using the AT-2030 you will need to connect to an external source such as a multimeter or vibration monitor control meter. If using AT-2040, simply plug the test accelerometer to the BNC connector labeled “Sensor Input”

Wilcoxon Research Velocity Transducer connected to sensor input for sensitivity reading.

 

3) Set the AT-2030 or AT-2040 portable vibration calibrator to the correct frequency and amplitude and begin your measurements. Using the manufacturer datasheet as a guide, set the correct frequency and amplitude and take your first reading. After that is complete, move on to your second, and so on. If using the AT-2040 and your sensor is preset, the “Auto” button will perform an automatic sweep of all needed points for you and store the data. Alternatively, with the AT-2040 you can also go through the accelerometer manually and save data to the unit to create a calibration certificate.

 

 

AT-2030 & AT-2040 Shake Screen.

 

 

 

                                                    
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AT-2040 Manual Sensitivity Test

 

 

 

 

 

Accelerometer calibration Test

 

 

AT-2040 Automatic Sensitivity Test

 

 

 

 

4) Create your certificate. If using the AT-2030 you will need to input your data into excel and print your certificate manually. If using the AT-2040, simply download your automatically created certificate to USB in PDF format.

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AT-2040 PDF Certification Save Menu.