STW515_en-US_v1.2 10/24
USER MANUAL
Stopwatch/Clock with Backlit Display
Model STW515
Introduction
Thank you for selecting the Extech STW515 Water Resistant Stopwatch with
Split Time, Alarm, and Clock features. Careful use of this stopwatch will
provide years of reliable service.
Quick Start
Light Button
Short press to turn the backlight ON for 5 seconds.
Mode Button
Short press the MODE button to step through the 4 modes: Normal Time,
Stopwatch, Alarm set, Time set.
Start / Stop Button
In Normal Time mode, long press to show date.
In Stopwatch mode, short press to start or stop counting.
In Alarm or Time setting mode, short press to increment the time value (long
press to scroll quickly). Short press the Split / Reset button to toggle
minutes/seconds.
Split / Reset Button
In Normal time mode, long press to show the alarm time.
In Stopwatch mode, short press to reset the value or to show split time.
In Alarm mode, short press to switch between hour and minute setting.
In Time set mode, short press to step through the date and time settings.
Operation
MODE SELECTION
Short press the MODE button to step through the 4 modes:
Normal Time, Stopwatch, Alarm set, and Time set
NORMAL TIME MODE
1. In Normal Time the Hours/Minutes/Seconds and Weekday is displayed.
2. Long press the SPLIT/RESET button to view the Alarm Time.
3. Long press START/STOP to view the month and day.
4. To turn the Alarm ON or OFF, press the START/STOP button while
holding down the SPLIT/RESET button (the bell icon appears on the right
when the Alarm is turned ON).
STOP WATCH MODE
(To access, press the MODE button once from Normal Mode)
When the Stopwatch Mode is first accessed, the SU-FR-SA icons will flash.
A. Elapsed Timer
1. Press Start/Stop to Start (SU-SA icons flash)
2. Press Start/Stop to Stop (SU-FR-SA icons flash)
3. Press Start/Stop Restart
4. Press Start/Stop to Stop
5. Press Split/Reset to reset the display
6. Press MODE to return to Normal Mode
B. Split Time
1. Press Start/Stop to Start (SU-SA icons flash)
2. Press Split/Reset to Split (SU-TH-SA icons flash)
3. Press Split/Reset to release Split (SU-SA icons flash)
4. Press Start/Stop to Stop (SU-FR-SA icons flash)
5. Press Split/Reset to reset the display.
6. Press MODE to return to Normal Mode.
C. Two-Competitor Timer
1. Press Start/Stop to Start (SU-SA icons flash)
2. Press Split/Reset to Split (SU-TH-SA icons flash)
3. Press Start/Stop to Stop (SU-TH-FR-SA icons flash)
4. Press Split/Reset to release Split (SU-FR-SA icons flash)
5. Press Split/Reset to reset the display
6. Press MODE to return to Normal Mode
ALARM SET
(To access, press MODE twice from the Normal Mode).
1. The hour digits and MO icon will flash.
2. Short press STOP/START to advance the hour (long press to scroll
quickly). This step also activates the alarm and displays the alarm icon.
3. Press SPLIT/RESET to select minutes.
4. Press STOP/START to advance the minutes (long press for fast scroll).
5. Press MODE to save alarm setting and to return to the time display.
6. To enable the Alarm, follow step 4 in the Normal Time Mode section. Note
that the Alarm time setting will reflect the AM, PM, or H mode programmed
in the SETTING DATE AND TIME section.
ALARM SNOOZE and ALARM SILENCE
When the alarm sounds, press START/STOP.
A 5-minute snooze period will begin. To silence the alarm without snooze,
press SPLIT/RESET after the alarm sounds.
HOUR CHIME
(Stopwatch beeps once every hour on the hour)
To set the Hour Chime ON, press and hold SPLIT/RESET then short press
MODE (while continuing to hold SPLIT/RESET) until the days of the week
appear. To turn the Chime OFF short press MODE (while continuing to hold
the SPLIT/RESET button) until the days of the week switch OFF.
SETTING DATE AND TIME
(To access, press MODE button 3 times from Normal Mode)
Short press SPLIT/RESET to step through the settings.
(SS/MM/HH/Day/Month/Weekday). The flashing digit is the digit that is ready
to be edited.
Short press the START/STOP button to advance the flashing digit; long
press to quickly scroll. The hour digits will scroll through A (for AM), P (for
PM) and H (for 24 hour clock). Press MODE to return to normal operation.
Battery Replacement
This Stopwatch uses a CR2032 button battery. Remove the six (6) Phillips
head screws on the rear of the watch to open and access the battery. It is
recommended that a qualified technician replace the battery. Battery life is
typically one year.
Please dispose of batteries and main unit responsibly and in
accordance with applicable regulations.
Specifications
Operating Temperature 23°F to 122°F (-5°C to 50°C)
Operating Humidity 10% to 90%
Power CR2032 x 1
Dimensions 2.6 (w) x 3.0 (h) x 0.7 (d) in.
(66.5 (w) x 77 (h) x 19 (d) mm)
Weight 2 oz. (56 g)
Two-year Warranty
Teledyne FLIR warrants this Extech brand instrument to be free of defects
in parts and workmanship for two years from date of shipment. To view the
full warranty text please visit:
https://www.flir.com/support-center/warranty/instruments/extech-product-
warranty/.
Customer Support
Local Telephone List: https://support.flir.com/contact
Technical Support Site: https://support.flir.com
Copyright © 2024 Teledyne FLIR Commercial Systems, Inc.
All rights reserved including the right of reproduction in whole or in part in any form
www.extech.com
