Why do my ACT-1T stay on "initializing calibration please wait" and never begin calibration?

Why do my ACT-1T stay on "initializing calibration please wait" and never begin calibration?

If your ACT-1T modules are an old version, that could prevent them from calibrating. Go to the Menu, then About. If the ACT-1T version is shown in red, then it is an old version. Go to Administration, then Diagnostics, then check for the latest update and install it.
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