Ronda mastertech Movements Cal. 8040.N & 8040.B User Manual

Description of Display and Control Buttons

The Ronda mastertech 8040.N and 8040.B movements feature several display elements and control buttons:

Display Elements

• Second hand: Typically located at the 6 o'clock position.
• Minute counter: Sub-dial, usually at the 9 o'clock position, measures minutes up to 60.
• Hour hand (chronograph): Sub-dial, usually at the 6 o'clock position, measures hours (up to 12 hours).
• 1/10 second counter: Sub-dial, usually at the 2 o'clock position, measures tenths of a second. This also functions as the hour counter after 30 minutes for the 8040.N model.
• Date: Window displaying the current date.
• Day of the week hand: (Specific to 8040.N) Sub-dial indicating the day of the week.

Control Buttons

• Crown: Located at the 3 o'clock position, with multiple pull-out positions (I, II, III) for setting functions.
• Push-button A: Typically located at the 2 o'clock position, used for starting, stopping, and resetting the chronograph.
• Push-button B: Typically located at the 4 o'clock position, used for resetting the chronograph and for specific adjustment procedures.

Diagram Description: A schematic of a watch face showing the positions of the main hands (hour, minute, second), the date window, and the chronograph sub-dials (seconds, minutes, 1/10 seconds, hours). It also indicates the location of the Crown, Push-button A, and Push-button B.

Chronograph Functions

Chronograph: Basic Function (Start / Stop / Reset)

This function is used for standard timekeeping with the chronograph.

• Start: Press [Button A].
• Stop: Press [Button A] again to stop the timing and read the chronograph counters: 4 min / 38 sec / 7/10 sec.
• Zero Positioning (Reset): Press [Button B]. (The chronograph hands will be reset to their zero positions.)

Diagram Description: A sequence of three diagrams showing the watch face. The first shows the chronograph hands at rest. The second shows the hands running after Push-button A is pressed. The third shows the hands reset to zero after Push-button B is pressed.

Chronograph: Accumulated Timing

This function allows for timing multiple intervals consecutively.

• Start: Press [Button A] to begin timing.
• Stop: Press [Button A] again. Example: 15 minutes, 5 seconds.
• Restart: Press [Button A] again to resume timing.
• Second Stop: Press [Button A] again to stop the accumulated timing. Example: 5 minutes, 12 seconds after the restart. The total accumulated time is shown (e.g., 20 minutes, 17 seconds).
• Reset: Press [Button B] to return all chronograph hands to their zero positions.

Note: After stopping (Stop), the accumulation can be continued by repeatedly pressing [Button A] (Restart / Stop, Restart / Stop, ...).

Diagram Description: A sequence of diagrams illustrating the accumulated timing. It shows starting, stopping, restarting, and a final stop, with the sub-dials displaying intermediate and final accumulated times.

Chronograph: Intermediate or Interval Timing

This function allows measuring split times or intermediate intervals.

• Start: Press [Button A] to begin timing.
• Display Interval: Press [Button B]. The chronograph hands stop to display an intermediate time (e.g., 20 minutes, 17 seconds), while the main timing continues in the background.
• Making up the measured time: Press [Button B] again. The chronograph hands quickly advance to show the ongoing main measured time.
• Stop: Press [Button A] to stop the main timing. The final measured time is displayed.
• Reset: Press [Button B] to return all chronograph hands to their zero positions.

Note: After displaying an interval (by pressing B), further intervals or intermediate times can be displayed by repeatedly pressing [Button B] (display interval / make up measured time, ...).

Diagram Description: A sequence of diagrams showing the process of interval timing. It illustrates starting, pressing B to show an interval, pressing B again to catch up to the main time, and finally stopping the main time.

Setting the Time

Follow these steps to set the correct time:

1. Pull out the Crown to position III. The watch movement stops to prevent accidental changes.
2. Turn the Crown until the correct time is displayed (e.g., 8:45).
3. Push the Crown back into position I.

Note: To set the time to the exact second, pull out the Crown to position III when the second hand is at the 60-second mark. Push the Crown back into position I precisely when the desired second is reached.

Diagram Description: A diagram showing the watch face with the Crown pulled out to position III. An arrow indicates turning the Crown to set the time. Another diagram shows the Crown being pushed back to position I.

Setting the Date (Quick Mode)

This mode allows for quick adjustment of the date.

1. Pull out the Crown to position II. The watch continues to run.
2. Turn the Crown anticlockwise until the correct date (e.g., 01) appears in the date window.
3. Push the Crown back into position I.

Important Note: Avoid setting the date between approximately 8 PM and 12 AM, as this can cause the date to change incorrectly. If this occurs, set the date to the next day and then advance it from 01 to 31 to re-synchronize. An extreme acceleration in setting the date with quick mode can induce a false date indication. The synchronization is re-established by setting the date from 01 till 31 (Crown in position II).

Diagram Description: A diagram showing the watch face with the Crown pulled out to position II. An arrow indicates turning the Crown anticlockwise to change the date. Another diagram shows the Crown being pushed back to position I.

Setting the Date, Day of the Week (8040.N), and Time

This procedure is for setting all date, day, and time functions simultaneously.

Example:

• Current watch setting: 17th day / 01:25 / Monday
• Desired setting: 23rd day / 20:35 / Saturday

1. Pull out the Crown to position III. The watch stops.
2. Turn the Crown until yesterday's day of the week (e.g., Friday) is displayed.
3. Push the Crown to position II.
4. Turn the Crown anticlockwise until yesterday's date (e.g., 22) is displayed.
5. Pull out the Crown again to position III. The watch stops.
6. Turn the Crown until the correct date (e.g., 23) and day of the week (e.g., Saturday) are displayed.
7. Continue turning the Crown until the correct time (e.g., 8:35 PM) is displayed. Observe AM/PM.
8. Push the Crown back into position I.

Notes:

• For precise second setting, refer to the "Setting the Time" section.
• Ensure correct AM/PM indication when setting the time.

Diagram Description: A series of diagrams illustrating the steps. It shows pulling the crown to position III, turning it to set the day, pushing to position II, turning to set the date, pulling again to position III, turning to set the correct date and day, and finally turning to set the time before pushing the crown back to position I.

Adjusting the Chronograph Hands to Zero Position

This procedure is necessary if chronograph hands are not correctly aligned at their zero positions, for example, after a battery change.

1. Pull out the Crown to position III. All chronograph hands should be in their zero or current positions.
2. Keep [Button A] and [Button B] depressed simultaneously for at least 2 seconds. The second counter hand will rotate 360°, indicating that the corrective mode is activated.

Adjusting the Second Counter Hand:

• Single step: Press [Button A] once briefly.
• Continuous: Press and hold [Button A].
• After adjustment, press [Button B] to move to the next hand.

Adjusting the 1/10 Second Counter Hand (at 3 o'clock position):

• Single step: Press [Button A] once briefly.
• Continuous: Press and hold [Button A].
• After adjustment, press [Button B] to move to the next hand.

Adjusting the Minute Counter Hand (at 9 o'clock position):

• Single step: Press [Button A] once briefly.
• Continuous: Press and hold [Button A].
• After adjustment, press [Button B] to move to the next hand.

Diagram Description: A diagram shows the watch face with the crown pulled out. It illustrates pressing buttons A and B simultaneously. Subsequent diagrams show how pressing button A (briefly or continuously) adjusts the second counter, 1/10 second counter, and minute counter hands, and how pressing button B moves to the next hand for adjustment.

Final Step:

3. Return the Crown to position I. This terminates the chronograph hands adjustment process. The adjustments can be performed at any time.

Technical Specifications

• Battery Type: 395 (Diameter 9.5mm x 2.6mm / SR 927 SW)
• Accuracy: +20 / -10 seconds per month
• Date of Manual: 04/2014

Note: The text "65,5% = 40mm Durchmesser" appears in some diagram captions, likely referring to a dimension.