How do I set the time on Polar RCX3

Access watch settings scrolling by UP/Down button.
<Settings> <Ok> <Watch> <Time and Date Settings>

In Time Settings:
Set the local time (Time 1) and a time difference to it (Time 2).
With Time zone, you can select which time zone is used.
In Time view, you can easily change the time zone from Time 1 to Time 2 by pressing and holding DOWN.

Set the date with Date setting.

You can also download the user manual from the link below
http://www.polar.com/e_manuals/RS300X/Polar_RS300X_user_manual_English.pdf

Language settings should be specified in your user's manual.
See General Settings, Page 12-13
Read it. If you don't have one, download it from here

http://www.polar.com/e_manuals/FT7/Polar_FT7_user_manual_English/manual.pdf

See video

Polar FT 7 Heart Rate Watch review

Polar FT7 Heart Rate Monitor


Polar FT7 Fitness Heart Rate Monitor HeartRateMonitorsUSA com Polar FT7 Review 2015 Best Heart Rate Watch

try link below
http://www.polar.com/e_manuals/FT4/Polar_FT4_user_manual_English/manual.pdf

Shortcut battery with AC contact. AC can be found on the sides of watch movement(very tiny). You have to use pointed tweezers: one end on battery+, another on AC contact for three secs..

Simple: from the default time screen. Push either of the right side buttons until you see settings.

From settings: Choose Watch.

From watch choose time set.

To get the complete manual visit my tips and tricks page.

Simple: from the default time screen. Push either of the right side buttons until you see settings.

From settings: Choose Watch.

From watch choose date set.

To get the complete manual visit my tips and tricks page.

5.1.3 TIME SETTING
If you start from the Time of Day display, repeat steps 1-3, page 38.
4. Press the / buttons to select TIME. Press OK.
5. Press the / buttons to select 12 H or 24 H time mode. Press OK.
If you chose 12 h mode, select AM or PM with the / buttons. Press OK.
6. Set the hours with the / buttons. Press OK.
7. Set the minutes with the / buttons. Press OK.

How to set time(hour minutes)/date(day, month, year)/power hour on nike imara fit:
PLEASE READ CAREFULLY
STEP 1:
First hold the button for set/light.
STEP 2:
wait for the "hold to set" message to appear
once it appears, keep on holding the button until the hour is ready to be set or when the hour blinks.
TIP: Pressing the mode will enable you to choose from setting (HOUR, MINUTE, DAY, MONTH,YEAR, 12/24 HOUR FORMAT, POWER HOUR.)
STEP 3:
To set HOUR: press the start(for higher values) or stop (for lower values) button, choose whatever hour you want to set the time.
*If you are done setting the time press the set/light button, and there you have it.
If you still need to change the minutes of your digital watch proceed to step four.
STEP 4:
After, you have undergone step 1, & 2, or step 1, 2, & 3 (either way it'll still work), press the mode button and then, minute is ready to be set or when the minute blinks.
To set MINUTE: press the start (for higher values) or stop (for lower values) button, and choose whatever minute you want to set the time.
*If you are done setting the minute, press the set/light button, and there you have it.
If you still need to change the date specifically, the day of your watch proceed to step five.
STEP 5:
To set date, specifically, DAY:
*If you have only undergone step 1 & 2, or 1, 2, & 3, you need to press the mode twice. If you have undergone step 1, 2 , 3, & 4 you need to press the mode once.
To set DAY: press the start (for higher values) or stop (for lower values) button, and choose whatever day you want to set the date.
*If you are done setting the day, press the set/light button, and there you have it.
If you still need to change the date specifically, the month of your watch proceed to step six.
STEP 6:
To set date, specifically MONTH:
*If you have only undergone step 1 & 2, or 1, 2, & 3, you need to press the mode thrice. If you have undergone step 1, 2 , 3, & 4 you need to press the mode twice. If you did it step by step until 6, press the mode once.
To set MONTH: press the start (for higher values) or stop (for lower values) button, and choose whatever month you want to set the date.
*If you are done setting the month, press the set/light button, and there you have it.
If you still need to change the date specifically, the year of your watch proceed to step seven.
STEP 7:
To set date, specifically YEAR:
*If you have only undergone step 1 & 2, or 1, 2, & 3, you need to press the mode four times. If you have undergone step 1, 2 , 3, & 4 you need to press the mode thrice. If you skipped step 6, press the mode twice. If you did it step by step until 7, press the mode once.
To set YEAR: press the start (for higher values) or stop (for lower values) button, and choose whatever year you want to set the date.
*If you are done setting the year, press the set/light button, and there you have it.
If you still need to change the 12/24 hour format of your watch proceed to step eight.
STEP 8:
*If you have only undergone step 1 & 2, or 1, 2, & 3, you need to press the mode five times. If you have undergone step 1, 2 , 3, & 4 you need to press the mode 4 times. If you skipped step 6 & 7, press the mode thrice. If you skipped step 7, press mode twice. If you did it step by step until 8, press the mode once.
To set 12/24 HOUR FORMAT: press the start (for higher values) or stop (for lower values) button, and choose whatever format you want to set the time.
*If you are done setting the 12/24 hour format , press the set/light button, and there you have it.
If you still need to change the power hour of your watch proceed to step nine.
STEP 9:
*If you have only undergone step 1 & 2, or 1, 2, & 3, you need to press the mode six times. If you have undergone step 1, 2 , 3, & 4 you need to press the mode 5 times. If you skipped step 6, 7, & 8, press the mode 4 times. If you skipped step 7 & 8, press mode thrice. If you skipped step 8, press mode twice. If you did it step by step until 9, press the mode once.
To set POWER HOUR: press start for 3, 6, 12, 24 to set the power hour.
Press set/light to set POWER HOUR.

Have you had the battery tested? Try that, and we will go from there.Let me know, I can help you it just takes curtain steps to make sure we don't go through a bunch of things we don't have to in correcting this problem.