Casio 1840 Owner's Manual

Module No. 1840	1840-1
GETTING ACQUAINTED

Congratulations upon your selection of this CASIO watch. To get the most out of your purchase, be sure to carefully read this manual and keep it on hand for later reference when necessary.

About this manual

∙Button operations are indicated using the letters shown in the illustration.

∙Each section of this manual provides basic information you need to perform operations in each mode. Further details and technical information can also be found in the “REFERENCE” section.

LIGHT

MENU

GPS

Display Indicators

The following describes the indicators that appear along the bottom of the display.

Indicator	Description
GPS	• Watch is in the GPS Mode.
	• Flashes when the watch is performing a GPS measurement
	operation.
AUTO	Watch is in the GPS Auto or Continuous Mode.
SAVE	Watch is in the GPS One-shot or Auto Mode.
2D	Watch is performing a 2-dimensional GPS measurement (using
	three satellites). This is the type of measurement normally used
	in the Quick, One-Shot, and Auto Mode.
3D	Watch is performing a 3-dimensional GPS measurement (using
	four or more satellites), which provides better accuracy than
	2D. This is the type of measurement used in the Continuous
	Mode when data is obtained from four or more satellites.
ALM	Alarm is turned on.
SIG	Hourly Time Signal is turned on.
BATT	Battery power is low and battery needs to be replaced.

Precautions

∙The measurement functions built into this watch are not intended for use in taking measurements that require professional or industrial precision. Values produced by this watch should be considered as reasonably accurate representations only.

∙Though a useful navigational tool, a GPS receiver should never be used as a replacement for conventional map and compass techniques. Remember that magnetic compasses can work at temperatures well below zero, have no batteries, and are mechanically simple. They are easy to operate and understand, and will operate almost anywhere. For these reasons, the magnetic compass should still be your main navigation tool.

∙CASIO COMPUTER CO., LTD. assumes no responsibility for any loss or any claims by third parties that may arise through the use of this watch.

GENERAL GUIDE

∙Use MENU and GPS to change between modes.

∙In the GPS Mode, use Land Kto change between screens.

∙The watch beeps whenever you press a button to change to another mode

or screen.

				GPS Mode
Timekeeping Mode	Alarm Mode	Position Screen		Plot Screen
		Press GPS.		Press L.
	Press Lor K.
		Press GPS.		Press K.
		L	K	K	L
Press GPS.	Press MENU.
				K
	Menu Screen
	Press MENU.
				L
		Direction and Speed		Graphical Navigation
	Press GPS.	Screen		Screen
		∙ You cannot go from the Menu Screen to the GPS Mode after displaying the
		Menu Screen from the Timekeeping Mode or Alarm Mode. To get to the
		GPS Mode in this case, you have to press GPS to return to the
		Timekeeping Mode (or Alarm Mode) and then press GPS again to enter the
		GPS Mode.

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Using the Menu Screens

Many of the operations of this watch are performed using on-screen menus. The following describes the general procedures for using on-screen menus.

To use the Menu Screens

∙ In any mode, press the MENU button to

display the Menu Screen.

∙ The highlighted menu item is the one that

is currently selected.

∙ Use Land Kto move the highlighting. The menu will scroll automatically if all the items do not fit on a single screen.

∙Press ● to select the highlighted menu item. Selecting a menu item sometimes displays another menu, and sometimes it displays some sort of Setting Screen.

∙Press the MENU button to back track through menus.

Adjusting Display Contrast

Use the following procedure to adjust the relative darkness of the figures on the display.

To adjust display contrast

1. In any mode, press the MENU button and the Hbutton at the same time to display the Contrast Screen.

2. Use Kto increase contrast (making the screen darker) and Lto decrease it.

∙You can set contrast to one of 16 levels.

∙The current contrast setting is indicated by a value on the Contrast Screen.

3.After the contrast is the way you want, press MENU or ● to return to the screen you started from in step 1.

∙You can also display the Contrast Screen using the following procedure: Press MENU, highlight SET UP, press ●, highlight CONTRAST, press ●. After setting the contrast, press MENU twice to return to the Menu Screen.

BACKLIGHT

Press the LIGHT button to illuminate the display for about two seconds.

∙ The backlight is disabled while a GPS measurement operation is in progress (indicated when the GPS indicator is flashing) and while the WAIT message is on the display following a Set Up Menu operation.

∙The electro-luminescent (EL) panel that illuminates the display loses illuminating power after very long use.

∙Illumination may be hard to see when viewed under direct sunlight.

∙The watch may emit an audible sound while the backlight is on. This is normal and does not indicate malfunction.

TIMEKEEPING MODE

Day of the week

Current date (year, month, day)

Current time

PM indicator (AM indicator for morning times)

Use the Timekeeping Mode to view the current time and date. You can select from among the four different Timekeeping Screen formats shown below.

Standard 12-hour	Summer Time (DST)
Timekeeping	12-hour Timekeeping

Hold down ● about

one second.

H J

DST indicator

KK

Press H.							Press H.
L					Hold down ● about		L
					one second.
					H	J
					24-hour timekeeping
					indicator
Standard 24-hour							Summer Time (DST)
Timekeeping						24-hour Timekeeping

∙The summer time or Daylight Saving Time (DST) Screen automatically advances the current time setting by one hour. This is a practice followed in certain geographic areas, and may or may not apply in your area.

Setting the Current Time and Date

Use the Menu Screen to set the current time and date, and to reset the second’s count to zero.

Important!

The GPS Mode of this watch uses the time and date settings to determine the current positions of satellites. Make sure that your time and date setting are always accurate.

To set the current time and date

1.In any mode, press the MENU button to display the Menu Screen.

2.Use Land Kto move the highlighting to SET UP.

3.Press ● to display the Set Up Menu.

4.Use Land Kto move the highlighting to TIME, and then press ●. ∙ This displays the current date and time setting, with the seconds digits

flashing.

5.Use Hand Jto move the flashing around the display to the other digits in the sequence shown below.

Press J.

Press H.

Seconds

Hour

Minutes

Day

Month

Year

6. While the hour, minutes, year, month, or day digits are selected (flashing), press Kto increase them or Lto decrease them.

∙ Holding down either button changes the flashing digits at high speed.

7.After everything is the way you want it, press GPS to exit the Setting Screen and return to the screen you started from in step 1.

To reset the seconds count to zero

1.In any mode, press the MENU button to display the Menu Screen, highlight SET UP, and then press ● to display the Set Up Menu.

2.Use Land Kto move the highlighting to TIME, and then press ●.

3.While the seconds digits are flashing, press Kto reset them to zero.

∙Pressing Kwhile the seconds count is in the range of 30 to 59 resets it to

00 and adds 1 to the minutes. If the seconds count is in the range of 00 to 29, pressing Kresets it without changing the minutes.

4.After everything is the way you want it, press GPS to exit the Setting Screen and return to the screen you started from in step 1.

Notes

∙The year can be set in the range of 1995 to 2039.

∙The day of the week is displayed automatically in accordance with the month and day settings.

∙The watch's built-in full automatic calendar makes allowances for different month lengths and leap years. Once you set the date, there should be no reason to change it except after replacing the watch’s battery.

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	ALARM MODE
Mode name	You can set an alarm time at which a beeper
	sounds for about 20 seconds each day. Press
	any button to stop the alarm.
	The watch also has an hourly time signal that
	beeps twice every hour on the hour when
	turned on.
	Alarm time

Hourly Time Signal on indicator

Alarm on indicator

To set the alarm

1.In any mode, press the MENU button to display the Menu Screen.

2.Use Land Kto move the highlighting to SET UP.

3.Press ● to display the Set Up Menu.

4.Use Land Kto move the highlighting to ALARM and then press ●. ∙ This displays the current alarm time setting, with the hour digits flashing.

5.Use Hand Jto move the flashing between the hour digits and the minutes digits.

6.Press Kto increase the flashing digits or Lto decrease them.

∙ Holding down either button changes the flashing digits at high speed.

7.After the alarm time is the way you want it, press GPS to exit the Setting Screen and return to the screen you started from in step 1.

To turn the alarm and Hourly Time Signal on and off

In the Alarm Mode, each press of ● cycles through the alarm and Hourly Time Signal on/off settings as shown below.

[Alarm On Indicator/Hourly Time Signal On Indicator]

ALM SIG

ALM SIG

ALM SIG

ALM SIG

Both Off

Alarm On

Hourly Time

Both On

Signal On

∙An indicator appears above ALM at the bottom of the display when the alarm is turned on, and above SIG when the hourly time signal is turned on.

To test the alarm

In the Alarm Mode, hold down ● to sound the alarm.

GPS MODE

The GPS Mode provides you with a collection of powerful GPS functions that allow you to determine your current position and perform other useful navigation operations. After entering the GPS Mode, use the Land K buttons to cycle through four GPS Data Screen formats as shown below.

GPS Data Screens

Position Screen

Plot Screen

PressL.

PressK.

L		K	K		L

K

L

Direction and Speed Screen

Graphical Navigation Screen

∙ The Position Screen appears first whenever you enter the GPS Mode.

Setting Up the GPS Mode

The following are settings you need to make before actually taking any measurements with the GPS Mode. Most of these need to be made only the first time you use the watch. See the referenced pages for full information about each setting.

∙Area setting (See “Setting Your Area”)

∙Datum setting (See “Setting a Datum”)

∙Distance unit setting (See “Setting the Distance Unit”)

∙Speed unit setting (See “Setting the Speed Unit”)

Important!

∙The Timekeeping Mode time and date settings are also used to determine the current positions of satellites. Make sure that your time and date setting are always accurate.

Taking a GPS Measurement

The following are the basic steps for taking a position measurement in the GPS Mode. See the referenced pages in this manual for further details.

The following procedure uses the One-Shot Mode as an example. See “GPS Measurement Modes” for information about other measurements.

Important!

∙GPS measurements may take a long time to complete or may even be impossible due to satellite and other conditions.

To take a GPS measurement

									1. While a GPS Data Screen is on the
									display, press ●.
									∙ This example procedure starts from the
									Position Screen.
									∙ This changes to the Satellite Search
									Screen.
									∙ The indicator flashes above GPS at the
									bottom of the screen to indicate that the
Antenna
									watch is searching for overhead satellites.
					L
									∙ To interrupt an ongoing GPS
									measurement, press ● again.
									∙ Make sure the antenna is pointing up at
									the sky while a measurement is taking

place.

2. When the measurement is successful, the watch beeps a number of times and returns to the GPS Data Screen you started from in step 1.

∙See “To add a landmark by registering your current location” for information about storing GPS measurement data in Landmark Memory.

∙See “GPS Measurement Modes” for more information about indicators and how the watch updates measurement data.

∙If the watch is unable to successfully complete the measurement within about two minutes, it plays a short tune and displays SATELLITE at the top of the display to let you know. If this happens, press ● twice to return to the GPS Data Screen, move to a more open area, and try again.

∙If you perform the above GPS measurement operation within the area defined by 20° to 46° north latitude and 122° to 149° east longitude, a successful measurement causes a map of Japan to appear on the display for a few seconds, followed by a GPS Data Screen.

GPS Measurement Modes

You can select from among four different GPS measurement modes. The mode you should select depends on how quickly you want your position data updated balanced against how important it is for you to conserve remaining battery power.

Remember, however, that no matter which GPS measurement mode you use, it can take a considerable amount of time to achieve the first measurement.

	To perform:	Use:
	One-shot measurement with standby for	Quick Mode
	subsequent measurements
	One-shot measurement with no standby	One-Shot Mode
	(power save)
	Continuous measurement with standby for	Continuous Mode
	subsequent measurements
	Continuous measurement with semi-standby	Auto Mode
	(power save)

∙The standby modes provide faster updating of measurement data following the first measurement, but they consume more battery power because the watch’s GPS circuit remains in standby (half power). The indicator flashing above GPS at the bottom of a GPS Data Screen indicates that GPS measurement is in standby.

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∙The non-standby modes take longer to produce subsequent measurements, but shutdown of the watch’s GPS circuit between measurements conserves battery power. In these modes, the indicator above GPS at the bottom of a GPS Data Screen does not flash and an indicator appears above SAVE to indicate power save is enabled.

Quick Mode

The Quick Mode performs a GPS measurement when you press ● and updates the GPS Data Screen. After the first measurement, the watch’s GPS circuit remains in standby, which is indicated by the flashing indicator above GPS at the bottom of the GPS Data Screen. Because of this, subsequent measurements are produced more quickly. Continuous Quick Mode standby uses battery power. To exit standby, press Jwhile the Position Screen is on the display to change to another measurement.

One-Shot Mode

The One-Shot Mode also performs GPS measurement when you press ● and updates the GPS Data Screen. In this mode, however, the watch’s GPS circuit is shut down between measurements. Because of this, it takes more time to perform each measurement.

Continuous Mode

The Continuous Mode performs a GPS measurement every second starting when you press ● and ending when you press ● again. The GPS Data Screen is updated with each measurement. In the Continuous Mode, the watch’s GPS circuit remains in standby, which is indicated by the flashing indicator above GPS at the bottom of the GPS Data Screen.

Auto Mode

The Auto Mode also performs a GPS measurement every minute starting from when you press ● and ending when you press ● again. The GPS Data Screen is updated with each measurement. Though the GPS circuit shuts down between measurements in this mode, the indicator above GPS continues to flash until you press ● to stop measurement.

Important!

∙The indicator flashing above GPS at the bottom of a GPS Data Screen indicates that the GPS circuit is activated, which consumes valuable battery power. To prolong battery life, be sure to use the following operations to turn off the GPS circuit when you are not using it.

∙Press ● to stop position measurement and turn off the GPS circuit. The indicator above GPS stops flashing at this time.

To select a GPS measurement mode

While the Position Screen is on the display in the GPS Mode, press Jto cycle through the GPS measurement modes in the sequence shown below.

Press J.

Quick Mode

One-Shot Mode

Continuous Mode

Auto Mode
Position Screen
Latitude	∙ The Position Screen shows your current
	position in terms of latitude and longitude.
	∙ Latitude is indicated as N (north) or S
	(south), and longitude as E (east) or W
	(west).

Longitude

Plot Screens

The Plot Screens show your current location and your progress (tracks) from one waypoint to another.

∙See “Track Memory” for information about tracks and how they are stored in memory.

∙With the Plot Screens, the top (12 o’clock position) of the watch’s display is always north.

Plot Screen Formats

There are two Plot Screen formats: a Map Screen and a Waypoint Plot Screen. ∙ Press Jto toggle between screen formats.

Press J.

H J

Map Screen

Waypoint Plot Screen

∙The Map Screen shows tracks and your current position inside the grid cell where your current position is located.

∙The Waypoint Plot Screen normally shows the two waypoints between which your current position is located. You can also scroll to view other sets of waypoints along your route.

∙When you change to the Map Screen, a Map Scale Screen first appears for about two seconds, followed by the Map Screen.

Grid cell width

Grid cell height

J

∙When you change to the Waypoint Plot Screen, the virtual width of the screen first appears for about two seconds, followed by the Waypoint Plot Screen.

Screen virtual
width	J

Destination waypoint number (W.P 1 = Waypoint 1)

Waypoints

Note that you must define waypoints in watch memory before you can use the Waypoint Plot Screen. See “Using Waypoints” for information about defining and managing waypoints.

∙The message NO W.P (no waypoints) appears on the screen if there are no waypoints defined in the WAY PT. (waypoint) List.

Using the Map Screen

Once you set up the Map Screen to match the gridlines on your paper map, you can easily plot your position within a specific grid cell on the map. A simple operation also lets you quickly determine which grid cell on the map is currently shown on the Map Screen of the watch.

∙See “Maps and Gridlines” for information about the types of maps that are compatible with the Map Screen.

∙See “Map Scale Settings” for other important information about the map scale.

Important!

∙The Map Screen of this watch is designed for use with maps that indicate latitude and longitude down to minutes. It will not work properly with maps that indicated latitude and longitude in degrees only.

To set up the Map Screen to match the gridlines of your map

1. In any mode, press the MENU button to display the Menu Screen.

2. Use Land Kto move the highlighting to SET UP and then press ● to display the Set Up Menu.

3. Use Land Kto move the highlighting to MAP SCALE and then press ● to display the Map Scale Setting Screen.

∙The values on the Map Scale Setting Screen are for specifying the vertical-to- horizontal ratio (in minutes) of each grid cell on the map you are using. 1:2, for example, indicates that grid cells are twice as wide as they are high.

4.Use Hand Jto move the highlighting between the vertical and horizontal ratio values, and Land Kto change the highlighted value.

∙See “Map Scale Settings” for full details about how your settings affect the appearance of the screen.

5.After everything is the way you want, press ● to return to the Set Up Menu with DST UNITS highlighted.

6.Press the MENU button to return to the Menu Screen.

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GPS Measurement with the Map Screen

After successful measurement is achieved, your current position appears on the Map Screen.

Current position (flashing)

Waypoint

∙See “Taking a GPS Measurement” for full details about GPS measurements.

∙Any waypoints () located in the same grid cell as your current location also appear on the display.

To determine your current grid cell

1. Set up the Map Screen to match the gridlines of the map you are using.

∙ See “To set up the Map Screen to match the gridlines of your map”.

2. While your position is plotted on the Map Screen, press Hto display the Corner Screen.

∙ This screen shows the latitude and longitude of the upper left corner of the grid cell on your map where your current position is located.

∙See “Maps and Gridlines” for detailed information about grid cells.

3.Press Hto return to the Map Screen.

∙When you press H, the Map Scale Screen appears for about two seconds, followed by the Map Screen.

Using the Map Screen for Navigation

Let’s say you want to use the Map Screen to determine your position on a paper map. Let us assume that your map is marked with lines creating grid cells that are twice as wide as they are high.

1.0'

1.0'

1.0'

1.0'

1.0'

1.0'

2.0'

2.0'

2.0'

2.0'

Use the following procedure to set up the watch to match the map and to plot your position on the map.

1. Use the procedure under “To set up the Map Screen to match the gridlines of your map” to set the map scale.

∙ If you want waypoints to appear on the Map Screen, use the procedure under “Using Waypoints” to define them.

2.Use the GPS Auto or Continuous mode to measure your position and plot it on the screen as you travel towards your destination.

3.Use the procedure under “To determine your current grid cell” to locate the currently displayed grid cell on your map.

4.Find the applicable grid cell on your map and you should be able to determine your route by tracing the tracks that appear on the display of the watch.

∙The example below shows the grid cell whose upper left corner is located at 35° 46' 00'' North latitude and 139° 18' 00'' East longitude.

	Map
139°14'
35°48'
47'
46'
45'
44'
43'
16'	18'	20'

Your route on the map

Using the Waypoint Plot Screen

The Waypoint Plot Screen shows preset waypoints in sets of two each, a start waypoint and a destination waypoint, along with track markers that indicate your progress between the two points. The distance between start and destination waypoints is scaled in order to allow both of them to fit on the screen, so the virtual width of the screen is adjusted automatically in accordance with the actual distance between the two displayed waypoints. Text at the bottom of the screen indicates the name of the next destination waypoint, and you can specify kilometers, miles, or nautical miles as the unit of measurement for the virtual width. When you reach a destination waypoint, a simple operation changes it to your new start waypoint and displays the next destination waypoint, automatically scaling the distance between them so they both fit on the screen.

GPS measurement with the Waypoint Plot Screen

After successful measurement is achieved, your current position appears on the Waypoint Plot Screen, along with your current start waypoint and destination waypoint.

Tracks indicating
your movement	Waypoint

Waypoint

Current position (flashing)

Destination waypoint number (W.P 1 = Waypoint 1)

∙Each waypoint is indicated on the display by a flag, which flashes alternately with the applicable waypoint number.

∙See “Taking a GPS Measurement” for full details about GPS measurements.

To display the next set of waypoints

1. While the Waypoint Plot Screen is on the display, press Hto display the next set of waypoints.

2. The virtual width of the screen for the new start and destination waypoints appears for about two seconds, followed by the Waypoint Plot Screen.

∙ You can use the above procedure to view upcoming waypoints to determine

Lchanges in direction. Remember that the

top of the display is always north.

Graphical Navigation Screens

The Graphical Navigation Screen shows the distance and direction from your current position to a destination waypoint. You can specify kilometers, miles, or nautical miles as the unit of measurement for the distance.

∙See “To set the distance unit” for information about how to set the units of measurement.

Important!

∙The Graphical Navigation Screen will not work properly unless you have defined waypoints already. See “Using Waypoints” for information about defining and managing waypoints.

Graphical Navigation Screen Formats

There are two Graphical Navigation Screen formats: a Fixed Direction Screen and a Current Direction Screen.

Fixed Direction Screen								Current Direction Screen

∙The Graphical Navigation Screen format is normally the Fixed Direction Screen. It automatically switches to the Current Direction Screen only while the watch is in the Continuous Mode and you are moving at a speed of 8kph or faster. The Current Direction Screen is refreshed with each new successful position measurement.

∙Both screens show the name of your destination waypoint, a pointer to the next destination waypoint, and the distance to the next destination waypoint.

∙With the Fixed Direction Screen, the top (12 o’clock position) of the display is always north, while with the Current Direction Screen the top of the display is always your current direction of travel.

Watch display