How accurate is the internal clock of the main unit?

The LT internal clock has a slight error. At normal operating temperatures and conditions, with the LT operating from its lithium battery, the degree of error is 65 seconds per month. Variations in operating conditions and battery life can cause this error to vary from +90 to -380 seconds per month. For systems where this degree of error will be a problem, the user should be sure to monitor this error and make adjustments when required.

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