Seiko H024A - User Manual

Movement
Item
H024A
Jewels
Cal. No.
—
[SPECIFICATIONS]
• Hourly time signal
• Alarm test system
• Sound for button operation confirmation
• Battery life indicator
Additional mechanism
Monthly rate within normal temperature range: less than 15 secondsLoss/gain
Nil
Regulation system
Use 10-second gate.Measuring gate by quartz tester
SB-BU (SR1130W)
Battery life is approximately 3 years.
Voltage: 1.55V
Battery
(x 1.2)
Movement
size
Outside diameter
ø31.0 mm
29.0 mm between 3 o’clock and 9 o’clock sides
28.5 mm between 12 o’clock and 6 o’clock sides
ø30.0mm
29.0 mm between 3 o’clock and 9 o’clock sides
28.5 mm between 12 o’clock and 6 o’clock sides
Casing diameter
5.5 mm
Height
Analogue section Digital sectionTime indication
Driving system
Multiplex driving system
Step motor, 1 piece
2 hands
(Hour and minute hands)
Nematic Liquid Crystal, FEM (Field Effect
Mode)
• Time/calendar display
• Hour, minute and second
• Selection of 12h/24h-format indication
• Year, month, date, day of the week and
fully automatic calendar between the year
2006 and 2055
• Stopwatch display
•Hour, minutes, seconds and 1/1000
seconds
• Up to 23 hours 59 minutes 59 seconds and
999
• Data recall function
• Alarm display
• Daily alarm (2 channels)
• Timer
• Up to 23 hours and 59 minutes
• Time display
• Hour and minute hands, two
hands straight 10-second
increments
Display system
Cal. H024A
2 jewels
PARTS CATALOGUE / TECHNICAL GUIDE

Summary

Structure of the Circuit Block

Remarks on Installing the Battery

Remarks on Disassembling and Reassembling

Hour and Minute Hands Installation;Removal

Instructions for installing and removing watch hands, including specific timing.

Battery and Switch Spring Installation

Guidance on installing the battery and switch spring correctly onto the main plate.

Value Checking

Time Accuracy Measurement

Procedure for measuring the watch's timekeeping accuracy using specific button inputs.

Electrical Value Checks

Details on measuring upconverter coil resistance, coil block resistance, and current consumption.

Seiko H024A Specifications

General

Brand	Seiko
Model	H024A
Category	Watch
Language	English