Cold Junction Compensation on mioDAQs

Updated Oct 30, 2024

Reported In

Hardware

  • USB-6453
  • USB-6421
  • USB-6451
  • USB-6423

Issue Details

Do the mioDAQs such as the USB-6421, USB-6423, USB-6451, and the USB-6453 Devices have Cold Junction Compensation? 

Solution

All USB-6421, USB-6423, USB-6451, and USB-6453 devices are equipped with a temperature sensor located near the front panel connectors. This sensor can be utilized for Cold Junction Compensation (CJC) when the built-in CJC source is selected for a thermocouple virtual channel.

Some considerations to take into account are: 

  • The temperature sensor is read-only when a task using the built-in CJC source is initiated. The value obtained at the start of the task is used throughout its duration.
  • Due to the single reading at the task’s start, the CJC accuracy is guaranteed only for relatively short acquisition periods. 

 

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