Seiko S830 Instructions Manual page 30

（3） E ngagement and disengagement of the alarm ... 145
（4）How to stop the alarm while it is sounding ... 145
How to use the world time mode ... 146
（1）Buttons and functions ...... 146
（2）How to select the city......... 147
（3）How to set the DST ............ 147
（4）City names and time diff erence ... 148
4．Sensor functions
How to use the altimeter (ALTI) mode ... 149
（1）Buttons and functions ...... 150
（2）Explanation of display ......... 151
（3）How to correct altitude ...... 151
（4）About climbing speed ......... 153
（5）How to measure altitude again ... 153
（6）How to keep mountaineering records ... 154
（7） H ow to call mountaineering records ... 164
（8）Mechanism of altitude measurement ... 167
How to use the barometer thermometer mode (BARO) ... 168
（1）Buttons and functions ...... 168
（2）Explanation of display ......... 169
（3）How to re-measure atmospheric pressure and temperature ... 170
How to use the compass mode ... 171
（1）Buttons and functions ...... 171
（2）How to measure direction ... 172
（3）Cautions when measuring direction ... 172
（4）Explanation of display ......... 173
（5）Magnetic north and true north ... 173
（6）How to correct magnetic declination ... 174
（7） H ow to carry out magnetic calibration
(magnetic correction) ............ 175
How to use mountaineering plan sunrise and sunset time mode ... 177
（1）Buttons and functions ...... 177
（2） H ow to use mountaineering plan
sunrise and sunset time mode ... 178
How to use the setting mode ...... 180
（1）Buttons and functions ...... 180
（2）How to check the set weight ... 181
（3）How to set the body weight and unit ... 181
5．To preserve the quality of your watch
Daily care .................................... 183
Water resistance ........................ 184
Performance and type .................. 186
Band ............................................. 187
Power source .............................. 189
After-sale service ........................ 191
6．Troubleshooting
Troubleshooting ........................... 194
How to reset the system ............ 198
7．Specifi cations
Specifi cations .............................. 199
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