User manual

Masterclock RC 500 User Manual – v2014.01.01

COUNT TO TIME

Select the “Count to Time” mode by pressing and holding

the [DOWN] button for 2 seconds. The [DOWN] button

should begin to steadily flash.

Enter the end real time of the count up by pressing the

[HOUR], [MINUTE] and/or [SECOND] buttons. With each

corresponding button pressed, the digit on the display

will increment. Enter the Real Time that you want to the

display to count-down toward in a 24 hour timescale.

(e.g.: if the current time is 1:05pm and you want to

count-down towards 1:30pm program the unit to 13:30.

At the end of the routine, the [DOWN] button will

continue to flash indicating the RC500 is currently in

Count to Time mode.

Press the [START] button to send a command to the

remote display and start the Count to Time. The display

will show the running count to time displaying the count-

down or remaining hours, minutes, and seconds until the

preprogrammed real time. The preprogrammed real

time may reference local or UTC or whatever “real time”

was programmed into the RC500 prior to the

initialization of the count time.

You cannot freeze the Count to Time routine.

To abandon the existing Count to Time, press [DOWN]

again.

To release the display device, press [CLOCK].

RC500 will auto adjust for Daylight Savings Time and

Leap seconds. Therefore, if the RC500 is counting down

towards a time between 0200 and 0259 on the first

morning of Daylight Savings Time, the count will

advance 24 hours to the first “available” time of 02**;

because that time does not exist on that morning.

The Count to Time feature will automatically count

down towards the next real time programmed into the

RC500. Depending on the settings in WinDiscovery, the

RC500 will then perform a Count-end flash and

commence a negative count upwards from zero

removing leading zeros. Or, will then infinitely flash all

zeros.