The red light indicates that the was an error within the Check-Set Calibrator.
- To handle the error, you can:
– Turn the Check-Set Calibrator off and on again. This may clear any software errors.
– Make sure the Check-Set Calibrator is in an environment between 65°F (18.3°C) to 75°F (23.9°C).
– Make sure nothing is blocking the fan in the back or the vent on the side of the device.
– If the red light persists, please contact Customer Service.



