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E-56
“ERR” appears on the lower display following bidirectional calibration.
If
- - -
appears and then changes to
ERR
(error) on the calibration screen, it means that there is something
wrong with the sensor.
If
ERR
disappears after about one second, try performing the calibration again.
If
ERR
keeps appearing, contact your original dealer or nearest authorized CASIO distributor to have
the watch checked.
Whenever you have a sensor malfunction, take the watch to your original dealer or nearest authorized
CASIO distributor as soon as possible.
Incorrect direction readings.
Incorrect bidirectional calibration. Perform bidirectional calibration (page E-24).
Nearby source of strong magnetism, such as a household appliance, a large steel bridge, a steel
beam, overhead wires, etc., or an attempt to perform direction measurement on a train, boat, etc. Move
away from large metal objects and try again.
Different results produced by direction readings taken at the same location.
Magnetism generated by nearby high-tension wires is interfering with detection of terrestrial magnetism.
Move away from the high-tension wires and try again.
Problems taking direction readings indoors.
A TV, personal computer, speakers, or some other object is interfering with terrestrial magnetism
readings. Move away from the object causing the interference or take the direction reading outdoors.
Indoor direction readings are particularly diffi cult inside ferro-concrete structures.
Remember that you will not be able to take direction readings inside of trains, airplanes, etc.
E-57
Specifi cations
Accuracy at normal temperature:
±15 seconds a month
Digital Timekeeping:
Hour, minutes, seconds, p.m. (P), month, day, day of the week
Time format: 12-hour and 24-hour
Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099
Other: Two display formats (month, day or time); Home City code (can be assigned one of 48 city
codes); standard time / daylight saving time (summer time)
Analog Timekeeping:
Hour, minutes (hand moves every 10 seconds), seconds
Digital Compass:
20 seconds continuous readings; 16 directions; Angle value 0° to 359°; Hand indication of
north; Calibration (bidirectional); Magnetic declination correction; Bearing Memory
Thermometer:
Measurement and display range: –10.0°C to 60.0°C (or 14.0°F to 140.0°F)
Display unit: 0.1°C (or 0.2°F)
Measurement timing: Every fi ve seconds in the Thermometer Mode
Other: Calibration; Selectable measurement unit
Bearing Sensor Precision:
Direction: Within ±15°
Values are guaranteed for a temperature range of –10°C to 40°C (14°F to 104°F).
North indicated by second hand: Error within ±20°.
Temperature Sensor Precision:
±2°C (±3.6°F) in range of –10°C to 60°C (14.0°F to 140.0°F)
World Time:
48 cities (31 time zones)+ UTC; Home City/World Time City swapping
Other: daylight saving time/standard time
E-58
Stopwatch:
Measuring unit: 1/100 second
Measuring capacity: 23:59' 59.99"
Measuring modes: Elapsed time, split time, two fi nishes
Countdown Timer:
Measuring unit: 1 second
Countdown range: 60 minutes
Setting ranges: Countdown start time (1 to 60 minutes, 1-minute increments)
Alarms:
5 daily alarms (with 1 snooze alarm); Hourly Time Signal
Illumination:
LED light; Selectable illumination duration (approximately 1.5 seconds or 3 seconds);
Auto Light Switch
Other:
Button operation tone on/off, Low battery alert
Battery:
Two silver oxide batteries (Type: SR927W)
Approximate battery operating time: 2 years under the following conditions:
1 illumination operation (1.5 seconds) per day
Alarm: 10 seconds/day
Direction readings: 20 times/month
Temperature readings: Once/week
Frequent use of illumination runs down the battery. Particular care is required when using the auto
light switch (page E-48).
L-1
L-2
City Code Table
City
Code
City name
UTC Offset/
GMT Differential
PPG PAGO PAGO –11
HNL HONOLULU –10
ANC ANCHORAGE –9
YVR VANCOUVER
–8
LAX LOS ANGELES
YEA EDMONTON
–7
DEN DENVER
MEX MEXICO CITY
–6
CHI CHICAGO
NYC NEW YORK –5
SCL SANTIAGO
–4
YHZ HALIFAX
YYT ST. JOHN’S –3.5
RIO RIO DE JANEIRO –3
FEN F. DE NORONHA –2
RAI PRAIA –1
City
Code
City name
UTC Offset/
GMT Differential
UTC
0LIS LISBON
LON LONDON
MAD MADRID
+1
PAR PARIS
ROM ROME
BER BERLIN
STO STOCKHOLM
ATH ATHENS
+2CAI CAIRO
JRS JERUSALEM
MOW* MOSCOW
+3
JED JEDDAH
THR TEHRAN +3.5
DXB DUBAI +4
KBL KABUL +4.5
KHI KARACHI +5
L-3
City
Code
City name
UTC Offset/
GMT Differential
DEL DELHI +5.5
KTM KATHMANDU +5.75
DAC DHAKA +6
RGN YANGON +6.5
BKK BANGKOK +7
SIN SINGAPORE
+8
HKG HONG KONG
BJS BEIJING
TPE TAIPEI
SEL SEOUL
+9
TYO TOKYO
ADL ADELAIDE +9.5
GUM GUAM
+10
SYD SYDNEY
NOU NOUMEA +11
WLG WELLINGTON +12
* As of December 2013, the offi cial UTC offset
for Moscow, Russia (MOW) has been changed
from +3 to +4, but this watch still uses an
offset of +3 (the old offset) for MOW. Because
of this, you should leave the summer time
setting turned on (which advances the time by
one hour) for the MOW time.
This table shows the city codes of this watch.
The rules governing global times (UTC offset
and GMT differential) and summer time are
determined by each individual country.
Operation Guide 5415
8


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  • I replaced both batteries in Pro Trek PRG-280 watch. Watch is running.. second hand moving.. in timekeeping mode when holding in the "adjust" button.. nothing changes. Where day of week should display is showing the word "OPEN". Suggestions on what i need to do/ Submitted on 1-9-2021 at 17:10

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