7K • Chapter 8
8-8
When entering the command, press and hold the star (*) at the end of the
command. Release the star when your time reference signals its zero mark.
This will cause the controller to speak the seconds reading on the clock at that
time.
Note the amount that the clock is off from the reference. This is the amount of
drift in the clock over a week. Take these readings each week at
approximately the same time to understand the amount of drift.
Since the adjustment commands will only adjust the clock up to 29 seconds
ahead or 30 seconds behind, you will need to set a Scheduler setpoint that
occurs when the drift is less than that. Once-a-week or once-a-month may be
appropriate depending on your situation.
To automatically adjust the seconds of the clock (subtract 7 seconds for this
example) on the first Monday of every month at 2:00 AM using the Scheduler,
create a macro (9000 for this example) and a Scheduler setpoint (00 for this
example):
(PW) 20 9000 MPW 48 6 07 *
(PW) 28 00 9000 99 42 02 00 *
Note that the ambient temperature that the controller is subjected to may
change the amount, and direction, of the clock drift. You may need to change
the adjustment at different times of the year.
Note: See Chapter 9, Scheduler, for more information on setting a Scheduler
setpoint.
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