Daktronics TI-2022 Portable LED Timer - Manual (Page 16)

10 Controls and Timing Functions
To modify the preset time for programs 1, 2, 4, and 6:
1. Press and hold RESET for 2 seconds. The display will show PR## (program number)
and then the preset time.
2. While holding RESET, press START to increment minutes and press STOP to
increment seconds.
3. Release RESET to save the time. The display will count up to or down from that time,
depending on the selected program.
To set the time of day for programs 8 and 9:
1. Press and hold RESET for 2 seconds. The display will show PR## (program number)
and then the preset time.
2. While holding RESET, press START to increment hours and press STOP to
increment minutes.
3. Release RESET to save the Time of Day.
4.3 Program Operations
Individual programs function as follows:
1. Count Up with Pushbuttons. This program counts up from 0 to a programmed time and
sounds the horn. Operators can program the time from 0 to 99:59 (mn:sc) using the
switches on the side of the display. If the time is set to 0:00, the display will count up to
59:59, roll over to 0:00, and continue counting.
In this program, the time can be started and stopped using the switches on the side, or
external, normally open contacts. If a stop input is received within 9.99 seconds before the
start, the display will show a -XX.X time on the digits for 10 seconds following the start
and then will resume counting. While the display is counting, a start input will hold the
elapsed time for 10 seconds and then go back to the running time.
2. Count Up with Photocells. This program counts up from 0 to a programmed time and
sounds the horn. The operator can program the time from 0 to 99:59 (mn:sc) using the
switches on the side of the display. If the time is set to 0:00, the display will count up to
59:59, roll over to 0:00, and continue counting.
In this program, the start and stop inputs are typically external, normally closed contacts.
If the stop input is received within 9.99 seconds before the start, the display will show a -
X.XX time on the digits for 10 seconds following the start and then will resume counting.
While the display is counting, a start input will hold the elapsed time for 10 seconds and
then go back to the running time.
3. Agility Timer. This program is used to time events with a unique start and stop. These
events typically last less than 99.99 seconds; if the timer reaches 99.99, it will roll over to
0.00 and continue counting. Unlike programs 1 and 2, once the timer is stopped, a start
input will not cause it to begin counting again.
4. Game Clock. This program counts down to 0 from a programmed time and sounds a
horn. The operator can program the time using the switches on the side of the display
from 0 to 99:59 (mn:sc). If the time is set to 0:00, the display will count down to 0:00, roll
over to 59:59, and continue counting down.