Casio 5477 Operation Manual Download Page 7

E-55

 To take a direction reading

The watch’s Digital Compass corrects to level automatically when it is diffi cult to control your posture while 
mountain climbing, etc. (Auto Level Correction)

 

- - -

 is displayed when the angle is too great.

1. Point the 12 o’clock position of the watch in the direction you want to read.

2. While in the Timekeeping Mode or a sensor mode, use 

A

 to cycle through the sensor modes until 

COMP

 appears on the display.

• 

See “Selecting a Mode” (page E-30). A direction reading operation starts automatically when you enter 

the Digital Compass Mode.

• 

Starting a digital compass operation will cause the second hand to move momentarily to the 12 
o’clock position. After that, it will indicate magnetic north.

315°

Objective

Bearing Indication

Meaning

Bearing to objective: 
Northwest

N: North
E: East
W: West
S: South

Bearing 
angle to 
objective

North

E-54

 Taking Direction Readings

You can use the Digital Compass Mode to determine the direction of north, and to check your bearing to a 
destination.

 For information about what you can do to improve digital compass reading accuracy, see “Calibrating 

the Bearing Sensor” (page E-57) and “Digital Compass Precautions” (page E-64).

E-53

To record the barometric pressure

While taking barometric pressure readings, hold down 

A

 for at least two seconds.

 This records the barometric pressure along with the current date and time.

 The watch will return to the Barometer Mode screen automatically after recording is complete.

Barometer Precautions

 The pressure sensor built into this watch measures changes in air pressure, which you can then apply 

to your own weather predictions. It is not intended for use as a precision instrument in offi cial weather 
prediction or reporting applications.

 Sudden temperature changes can affect pressure sensor readings. Because of this, there may be 

some error in the readings produced by the watch.

E-52

To calibrate the pressure sensor

1. Take a reading with another measurement device to determine the 

exact current barometric pressure.

2. While in the Timekeeping Mode or a sensor mode, use 

A

 to cycle 

through the sensor modes until 

BARO

 appears on the display.

3. Pull out the crown. This will cause the current barometric pressure 

reading value to fl ash on the digital display.

4. Rotate the crown to adjust the barometric pressure value.

 The calibration unit is 1 hPa (0.05 inHg).

 To return the currently fl ashing value to its initial factory default 

setting, press 

A

 and 

C

 at the same time. 

OFF

 will appear at 

the fl ashing location for about one second, followed by the initial 
default value.

5. After you complete calibration, push the crown back in.

 Recording Barometric Pressure

You can use the procedure in this section to create a record of your current barometric pressure, along 
with the date and time of the reading. You can later recall a record to view it.

Important!

 The watch has memory that is shared for storage of up to 40 data records, including barometric 

pressure data. Note that recording new data when there are 40 data records in memory causes the 
oldest record to be deleted automatically to make room for the new record. See “Viewing Recorded 
Data” (page E-87).

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E-51

To enable or disable barometric pressure change indication

In the Timekeeping Mode or Barometer Mode, hold down 

C

 for at least two seconds. Wait until 

INFO

 

appears on the left side of the display and the current setting (

ON

 or 

OFF

) fl ashes on the right. Use this 

screen to enable or disable barometric pressure change indication.

 

BARO

 is shown on the digital display while indication is enabled.

 The small hand acts as a barometric pressure change indicator while 

ON

, and as a Tide Graph indicator while 

OFF

.

 Barometric pressure change indication is not performed when there is 

no signifi cant barometric pressure change.

 Note that barometric pressure change indication will turn off 

automatically 24 hours after you turn it on or if battery power goes low.

 Note that time calibration signal reception and power saving (page E-19) 

are disabled while barometric pressure change indication is enabled.

 Note that barometric pressure change indication cannot be enabled 

while the watch’s battery is low.

Pressure Sensor Calibration

The pressure sensor built into the watch is calibrated at the factory and normally requires no further 
adjustment. If you notice serious errors in the pressure readings produced by the watch, you can calibrate 
the sensor to correct the errors.

Important!

 Incorrectly calibrating the barometric pressure sensor can result in incorrect readings. Before 

performing the calibration procedure, compare the readings produced by the watch with those of 
another reliable and accurate barometer.

E-50

Important!

 To ensure proper results, take barometric readings under conditions where the altitude remains 

constant.

Example

– In a lodge or campground
– On the ocean

 A change in altitude causes a change in barometric pressure. Because of this, correct readings are 

impossible. Do not take readings while ascending or descending a mountain, etc.

Enabling or Disabling Barometric Pressure Change Indication

You can enable or disable barometric change indication as desired. When indication is enabled, the watch 
will take a barometric pressure reading every two minutes, regardless of the mode it is in.

 When 

BARO

 is shown on the display, it means that barometric pressure change indication is enabled.

 When 

BARO

 is not on the display, it means that barometric pressure change indication is disabled.

E-49

 Barometric Pressure Change Indications

Your watch analyzes past barometric pressure readings and uses a barometric pressure change indication 
to inform you about changes in pressure. If the watch detects a signifi cant change in barometric pressure, 
it will beep, a fl ashing arrow that indicates the direction of the pressure change will be displayed, and the 
small hand will point to the arrow mark. This means you could start taking barometric pressure readings 
after reaching a lodge or camp area, and then check the watch the next morning for changes in pressure. 
You will then be able to plan your day’s activities accordingly. Note that you can enable or disable display 
of the barometric pressure change indicator as desired.
Barometric pressure change is indicated in the Barometer Mode, while the Barometric Pressure Graph is 
displayed in the Timekeeping Mode (page E-33).

 Reading the Barometric Pressure Change indication

Small Hand and Digital Display

Meaning

  

Sudden fall in pressure.

  

Sudden rise in pressure.

   

Sustained rise in pressure, changing to a fall.

   

Sustained fall in pressure, changing to a rise.

 Barometric change indication is no performed if there has been no noteworthy change in barometric 

pressure.

E-48

 Reading Barometric Pressure Differential Pointer

Pressure differential is indicated in the 
range of ±10 hPa (0.3 inHg), in 1-hPa (0.03 
inHg) units.

 The nearby illustration, for example, 

shows what the second hand would 
indicate when the calculated pressure 
differential is approximately – 5 hPa 
(approximately –0.15 inHg).

• 

The second hand will point to 

+ OVER

 or 

– UNDER 

if the barometric 

pressure differential is outside the 
allowable range of the scale.

• 

The second hand will move to 9 o’clock 
if a reading is outside the altimeter 
measurement range, or if a reading error 
occurs.

 Barometric pressure is calculated and 

displayed using hPa as the standard. 
The barometric pressure differential also 
can be read in inHg units as shown in 
the illustration (1 hPa 

=

 0.03 inHg).

 To toggle between barometric pressure 

differential indication and the current 
time seconds count on the digital 
display, press 

C

.

Current pressure 

greater than most 

recent measured 

pressure

Current pressure

less than most

recent measured

pressure

inHg values

hPa values

Barometric pressure 
differential pointer

–10

–5

5

–0.3

–0.15

0.15

0

0

0.3

10

Operation Guide 5477

Summary of Contents for 5477

Page 1: ...eed movement or press any button E 3 Using the Crown The crown of this watch is a screw in lock crown Before using the crown you must rst rotate it towards you to loosen it After performing crown oper...

Page 2: ...ble or disable Power Saving E 115 Troubleshooting E 116 Speci cations E 125 E 11 Checking the Tide Level and Moon Ages Tide Moon E 96 To view the tide level and Moon age for a speci c date and time E...

Page 3: ...ation signal transmitters so certain conditions may cause reception problems When HKG or BJS is selected as the Home City only the time and date are adjusted according to the time calibration signal Y...

Page 4: ...t possible the watch keeps time with the precision noted in Speci cations The receive operation is disabled under any of the conditions below While power is at Level 3 L or lower page E 15 While the w...

Page 5: ...a m or P p m indicator will also be displayed This is the time setting mode In the following steps each press of B cycles between settings as shown below Home City DST Hour minute Month Day Hour Year...

Page 6: ...Mode page E 30 This enters the Barometer Mode and displays a barometric pressure reading after about one second After a barometric pressure reading operation is started the watch will take readings e...

Page 7: ...ressure change indication will turn off automatically 24 hours after you turn it on or if battery power goes low Note that time calibration signal reception and power saving page E 19 are disabled whi...

Page 8: ...readings If you plan to take direction readings in an open eld for example calibrate in an open eld To perform gure 8 calibration 1 In the Digital Compass Mode pull out the crown 2 Press A Move your a...

Page 9: ...l 1 In the Altimeter Mode page E 31 pull out the crown This will cause the current altitude reading value to appear 2 Press B This will cause INT to appear on the digital display along with the ashing...

Page 10: ...e of this the readings produced by this watch will not match the altitude readings announced or indicated by the ight crew E 75 How does the altimeter work Generally air pressure decreases as altitude...

Page 11: ...pressure increases one atmosphere 1 03kg cm2 with each 10 meter increase in depth The water depth sensor of your watch detects water pressure and the watch uses the relationship between water pressure...

Page 12: ...least three seconds After CLEAR starts to ash on the display keep C depressed for another two seconds and release it when CLEAR ALL stops ashing and remains displayed and will alternate on the display...

Page 13: ...n as in step 2 of this procedure to specify a time Calibrating the High Tide Time You obtain more accurate tide indications by the watch by calibrating its high tide time with information you can nd o...

Page 14: ...e Timekeeping Mode reaches the preset alarm time This is true even if the watch is not in the Timekeeping Mode You can also turn on an Hourly Time Signal which will cause the watch to beep twice every...

Page 15: ...e reading the watch s second hand points to 9 o clock The reading value is outside of the allowable measurement range See page E 48 There may be a problem with the sensor If ERR error is on the digita...

Page 16: ...out its down times Try again later The current time setting changes after I set it manually You may have the watch con gured for auto receive of the time calibration signal page E 23 which will cause...

Page 17: ...continuous reading Barometric Pressure Graph Measurement 12 times month Mountain Climbing 0 5 times month Altitude Measurement Approximately 1 hour Barometric Pressure Information Measurement Approxim...

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