connector on the timer’s front switch plate. To turn the timer on, move the unit’s power switch to
the EXT BATT position.
CHARGING THE INTERNAL BATTERY (OPTIONAL)
The timer’s internal battery is charged whenever the AC wall adapter is connected to the timer and
plugged into a live AC outlet. The built-in charger is completely automatic and will not overcharge
your battery, making it safe to leave the timer plugged in when not in use.
CHARGING THE EXTERNAL BATTERY (OPTIONAL)
The charger included with an external battery pack IS NOT automatic and must be monitored to
avoid overcharging the battery. To charge the external battery using the standard charger,
connect the battery to the charger and plug the charger into a live 110-volt outlet. IMPORTANT!
WHEN USING THE STANDARD CHARGER, CHARGE THE BATTERY TWO HOURS FOR
EVERY ONE HOUR OF USE - NEVER EXCEED 16 HOURS TO AVOID OVERCHARGING AND
DAMAGING THE BATTERY. The optional automatic battery charger is completely automatic and
will not overcharge the battery.
CONFIGURING THE DISPLAY
The ST-15 is shipped from the factory configured as follows:
1. 5-digit timer configured to display H: MM:SS (hours, minutes, and seconds)
2. count up (the timer will count up from zero to a user-preset stopping time or indefinitely if no
user-preset stopping time is entered)
3. 3-second horn when a user-preset stopping time is reached in count up mode or zero is
reached in count down mode
This is the most commonly used configuration for this model.
If this factory configuration suits your needs, there is no need to further configure the display.
If not, the information below will guide you in configuring the display to meet your needs.
Configuring the Display
There are seven parameters that may be set while configuring the display. Each parameter, 0-6, is
assigned a value by the user during configuration. The parameter numbers, descriptions, and
available settings are shown below:
Parameters Set During Configuration
Parameter ID
Description
Settings
0
Timer Function
1 = Timer / 3 = Time of Day
1
Number of Timer Digits
1-10
2
Number of Clock Digits
1-10
3
First Clock Digit Value
see table on page 6
4
Length of Horn
0-9 seconds
5
Count Up / Count Down
0 = Count Down / 1 = Count Up
