Channel Config: mV/EU Calibration

The main channel config page is where channel names, the type of channel, the units and the the calibration method to be used are defined. The channel type will restrict both the type of signal conditioning that is available and the units associated with the channel. Learn more about the channel type definition. The Calibration Method is used to setup the transducer sensitivity and each type has a respective setup tab for entering values. 

The simplest calibration method is mV/EU where it is possible to use the sensitivity defined by the manufacturer of a transducer without any end-to-end check out. All that is necessary is for the mV/EU ratio to be defined along with the appropriate power factors for the input voltage and the output engineering unit power factors. Additionally, it is possible for the power factors between the input and output to be different. For instance, a 1 V RMS input might reference a 100 g 0-pk output. Being able to selectively specify the power factors of the voltage and the output engineering unit aids in the setup of the system. Offsets can also be defined to handle non-zero intercept sensitivities.

The offset is calculated by EU = mv / mvPerEU + offset

Note: it is possible to reverse the sensitivity ratio from mV/EU to EU/mV in the system preferences.

In order to inject a voltage and capture it at a specified engineering unit, specify "AC Resp" in the calibration method. A signal generator will be necessary to inject a signal into the system at a known voltage. This voltage is assigned an EU value and will follow a linear slope. To learn more about AC Calibration, click here.

Learn more about the channel config and calibration types.