Seiko Caliber 7T62 Instruction Manual
Introduction
This document provides instructions for operating the Seiko Caliber 7T62 watch. It covers setting the time and date, using the stopwatch and alarm functions, understanding the tachymeter, and battery replacement.
For watch care instructions, please refer to the "How to preserve the quality of your watch" section in the accompanying international warranty and instructions.
Watch Features Overview
The Seiko Caliber 7T62 features timekeeping, a calendar, a one-time alarm, a stopwatch measuring up to 60 minutes in 1/5-second increments, and a tachymeter scale.
Watch Diagram Description: The watch face includes an hour hand, a minute hand, a small second hand, and sub-dials for the stopwatch functions and possibly a 24-hour indicator. The date is displayed in a window. The watch has a crown and two push-buttons (labeled A and B).
Crown Positions:
- a: Normal Position: For standard timekeeping.
- b: 1st Click: For setting the date.
- c: 2nd Click: For setting the time and alarm hands, and resetting stopwatch hands.
Setting Time and Stopwatch Hand Positions
The crown, when pulled to the second click (position c), allows for the following adjustments:
- Setting the time.
- Setting the alarm hands.
- Setting the stopwatch hands.
After pulling the crown to the second click, check and set items 1 and 2 simultaneously. If necessary, also set item 3.
1. Setting the Main Time
Pull the crown out to the second click (position c) when the stopwatch second hand is at the 12 o'clock position.
Diagram: Shows the watch face with hour, minute, and small second hands. Arrows indicate turning the crown to adjust the hour and minute hands.
Turn the crown to set the hour and minute hands.
Important Notes:
- If the crown is pulled to the second click while the stopwatch is running or stopped, the stopwatch hands will automatically reset to the "0" position.
- After setting the alarm, if the crown is pulled to the second click, the alarm hands will set to the current time.
- It is recommended to set the hands slightly ahead of the current time, considering the time needed for adjustments.
- When setting the hour hand, ensure correct AM/PM setting. The date changes once every 24 hours.
- When setting the minute hand, advance it 4-5 minutes past the desired time, then turn it back to set the exact time.
2. Setting Alarm Hands
Set the alarm hands to match the main time hands.
Diagram: Shows the watch face with alarm hour and minute hands. Button B is indicated.
Press button ?️ multiple times to advance the alarm hands to the desired time.
* The alarm hands move quickly if button ?️ is held down.
3. Setting Stopwatch Hand Positions
If the stopwatch hands are not at the "0" position, follow these instructions to set them:
- Press and hold button ?️ for 2 seconds. The stopwatch minute hand will complete a full circle.
- Press button ?️ multiple times to set the stopwatch minute hand to the "0" position. (Hands move quickly if button ?️ is held down.)
- Press and hold button ?️ for 2 seconds. The stopwatch 1/5-second hand will complete a full circle.
- Press button ?️ multiple times to set the stopwatch 1/5-second hand to the "0" position. (Hands move quickly if button ?️ is held down.)
Diagram: Shows a flowchart: Alarm Hands ➡️ Stopwatch Minute Hand ➡️ Stopwatch 1/5-Second Hand. Arrows indicate the sequence.
The alarm and stopwatch hands can be reset in the following order by pressing button ?️ for 2 seconds:
- Alarm Hands: Move through 12 hours.
- Stopwatch Minute Hand: Completes a full circle.
- Stopwatch 1/5-Second Hand: Completes a full circle.
After completing all settings, ensure the main dial hands and alarm hands show the same time.
Return the crown to its normal position according to the accurate time signal.
Setting the Date
Before setting the date, ensure the main time is set correctly.
Diagram: Shows the watch face with the date window and crown. Arrows indicate pulling the crown and turning it.
Pull the crown out to the first click (position b).
Turn the crown clockwise until the desired date appears.
Return the crown to its normal position.
Notes:
- The calendar requires correction at the end of February and for months with 30 days.
- Do not set the date between 9:00 PM and 1:00 AM, as this may damage the mechanism.
- Do not press button ?️ when the crown is in the first click position, as this will move the alarm hands.
Stopwatch
The stopwatch measures up to 12 hours with a 1/5-second increment.
After 60 minutes, the stopwatch restarts counting from "0" up to 12 hours.
Diagram: Shows the stopwatch minute and 1/5-second hands on a sub-dial.
Before using the stopwatch, ensure the crown is in the normal position and the stopwatch hands are set to the "0" position.
If the stopwatch hands did not return to the "0" position after setting, follow the instructions in "Setting Time and Stopwatch Hand Positions".
Standard Measurement
- START ▶️
- STOP ⏹️
- RESET ?
Accumulated Elapsed Time Measurement
A (START) ➡️ A (STOP) ➡️ A (RESTART) ➡️ ... ➡️ A (STOP) ➡️ B (RESET)
* Repeated start and stop of the stopwatch can be done by pressing button ?️.
Split Time Measurement
A (START) ➡️ B (SPLIT) ➡️ B (RETURN TO MEASUREMENT) ➡️ ... ➡️ A (STOP) ➡️ B (RESET)
* You can take split times multiple times and return to time measurement by pressing button ?️.
Measurement of Two Competitors' Times
A (START) ➡️ B (END OF 1ST COMPETITOR) ➡️ A (2ND COMPETITOR FINISHES) ➡️ B (END OF 2ND COMPETITOR) ➡️ B (RESET)
One-time Alarm
The alarm can be set to sound once at a designated time within a 12-hour period.
The alarm time can be set in one-minute increments.
Setting the Alarm Time
Before setting the alarm, ensure the alarm hands indicate the current time. (Refer to "Setting Time and Stopwatch Hand Positions").
Diagram: Shows the watch face with alarm hands and crown. Arrows indicate pulling the crown and pressing button B.
Pull the crown out to the first click (position b).
Press button ?️ multiple times to set the desired alarm time.
* The alarm hands move quickly if button ?️ is held down.
Return the crown to its normal position.
* The alarm activates automatically.
How to Stop the Alarm
When the set time is reached, the alarm rings for 20 seconds and then stops automatically. To stop it manually, press button ?️ or ?️.
- When the stopwatch is measuring, the alarm signal sounds differently than usual. This is not a malfunction.
- When the alarm is ringing, pressing button ?️ or ?️ will stop only the alarm; it will not affect the stopwatch operation.
How to Reset the Set Alarm Time
Pull the crown out to the first click (position b).
Diagram: Shows the watch face and crown. Arrows indicate pulling the crown and pressing button B.
Press and hold button ?️ until the alarm hands stop at the current time position.
Return the crown to its normal position.
To change the alarm time you have set, follow the instructions in "Setting the Alarm Time".
Tachymeter
(For models with a tachymeter scale)
For Measuring Average Speed of Vehicles
- Use the stopwatch to determine the time required to travel 1 km or 1 mile.
- The reading on the tachymeter scale indicated by the stopwatch hand shows the average speed per hour.
Diagram: Shows a watch face with a tachymeter scale around the bezel. The stopwatch second hand points to "90" on the tachymeter scale, and the elapsed time is 40 seconds.
Example 1: Stopwatch second hand: 40 seconds. Tachymeter scale: "90". Speed = "90" (tachymeter reading) x 1 (km or mile) = 90 km/h or mph.
The tachymeter scale can only be used when the measured time is less than 60 seconds.
Example 2: If the measured distance is 2 kilometers or miles, or reduced to 0.5 km or mile, and the stopwatch second hand shows "90" on the tachymeter scale:
- "90" (tachymeter reading) x 2 (km or mile) = 180 km/h or mph
- "90" (tachymeter reading) x 0.5 (km or mile) = 45 km/h or mph
For Measuring Productivity
- Use the stopwatch to determine the time required to complete one operation.
- The reading on the tachymeter scale indicated by the stopwatch hand shows the average number of operations completed per hour.
Diagram: Shows a watch face with a tachymeter scale. The stopwatch second hand points to "180" on the tachymeter scale, and the elapsed time is 20 seconds.
Example 1: "180" (tachymeter reading) x 1 (operation) = 180 operations per hour.
Example 2: If 15 operations are completed in 20 seconds:
"180" (tachymeter reading) x 15 (operations) = 2700 operations per hour.
Battery Replacement
The miniature battery in your watch is designed to last approximately 3 years. However, since the battery was installed at the factory, the actual remaining service life may be shorter than the indicated period from the time you acquire the watch.
When the battery runs out, you should replace it as soon as possible to avoid damaging the watch. For battery replacement, it is recommended to consult an OFFICIAL SEIKO DEALER and choose a SEIKO SR927SW battery.
- If the stopwatch is used for more than 2 hours a day, and/or if the alarm rings for more than 20 seconds a day, the battery life may be shorter than the indicated period.
- After replacing the battery with a new one, set the time/calendar, alarm, and stopwatch hand positions.
Battery Power Indicator
When the battery power is running low, the small second hand will start moving at 2-second intervals instead of the normal 1-second interval. In this case, the battery should be replaced as soon as possible.
- When the second hand starts moving at 2-second intervals, the alarm will not sound even if it is activated. This is not a malfunction.
- The watch continues to display the correct time even when the second hand starts moving at 2-second intervals.
Important Safety Information
ATTENTION
- Do not remove the battery from the watch.
- If necessary, keep the battery in a place inaccessible to children. If a child swallows a battery, seek immediate medical attention.
CAUTION
- Do not short-circuit, damage, or heat the battery. Never expose it to fire. The battery may explode, overheat, or ignite.
- The battery cannot be recharged. Do not attempt to recharge it, as this may cause damage to the battery.
Specifications
| No. | Item | Specification |
|---|---|---|
| 1 | Quartz Generator Frequency | 32,768 Hz (Hertz... cycles per second) |
| 2 | Monthly Rate Accuracy | ± 15 seconds at normal temperature (5°C ~ 35°C) |
| 3 | Alarm Accuracy | ± 1 minute |
| 4 | Operating Temperature Range | -10°C ~ +60°C |
| 5 | Actuating Device | Stepping motor, 4 pcs |
| 6 | Indication System |
|
| 7 | Battery | SEIKO SR927SW, 1 pc |
| 8 | Integrated Circuit | C-MOS-IC, 1 pc |
* Specifications are subject to change for product improvement without prior notice.
