Citizen C660 User Manual

7
3. Names of Components and Major Functions
6
Name/Mode Time Calendar Race timer Chronograph
1. Mode hand TME CAL RACE CHR
2. Hour hand Always indicates “hours”
3. Minute hand Always indicates “minutes”
4. Second hand Always indicates “seconds”
5. 24-hour hand Always indicates “24-hour time” in conjunction with hours and minutes
6. Function hand
Always stopped at 0-position
(standard position)
8. Digital display 2
City name, SMT (when set to
daylight savings time)
7. Digital display 1
Hours,
minutes,
seconds
Month, date,
day
Indicates the remaining
race time (minutes,
seconds)
Indicates the auto-
chronograph measured time
display (minutes, seconds)
Timer Alarm-1 Alarm-2 Zone setting
TMR AL-1 AL-2 SET
Always indicates “hours”
Always indicates “minutes”
Always indicates “seconds”
Always indicates “24-hour time” in conjunction with hours and minutes
Always stopped at 0-position (standard position)
Indicates the timer’s
remaining time
(minutes, seconds)
Hours, minutes, alarm (ON/OF) City name (SET/OFF)
Timer set time (minutes)
Indicates the
chronograph
measured time
(minutes, seconds,
1/100 seconds)
Indicates the remaining
race time (minutes)
Indicates the auto-
chronograph measured
time display (minutes)
Indicates the
chronograph
measured time
(minutes)
Indicates the remaining
race time (seconds)
Indicates the auto-
chronograph measured
time display (seconds)
Indicates the
chronograph
measured time
(seconds)
Race timer set time
(minutes)
Chronograph measured
time (hours)
City name

Citizen C660 Specifications

Operating Environment

accuracy	±15 seconds per month
operating temperature range	0°C to +55°C
normal operating temperature range	+5°C to +35°C

Battery

battery type	Secondary battery
fully charged running time	Roughly 4 years
two-second interval running time	Roughly 1.5 days