OWNER'S MANUAL
Setting the time, calendar and alarm, using the countdown timers with SYNC, changing the battery behind the screw-on case back and shortening the stainless steel band of the Ronstan ClearStart RF4036 sailing watch.
DocumentRonstan ClearStart RF4036 User Instructions
FormatPDF · 7 pages · 0.8 MB
LanguageEnglish

Functions
- Water resistant sailing watch: time of day, calendar, time of day alarm, countup (from zero) timer and programmed countdown timer with alarm.
- The countdown can run to zero and count up again, or run to zero and repeat the programmed period.
- Buttons: "MODE", "CLEAR", "PROG", "START/STOP" and "SYNC". "MODE" steps through Time, Calendar, Alarm and Timer.
- Electro-luminescence (E.L.) display: pressing "PROG" in any mode lights the nightlight blue for approx. 3 seconds.
Set Time and Calendar
- Press "MODE" until the watch is in time mode (central colon flashing, no countdown icons; AM or PM shown in 12 hour mode).
- Hold "CLEAR" approximately 2 seconds until the hour flashes; press "PROG" to set the hour (hold for fast scrolling). "START/STOP" toggles 12/24 hour while the hours flash.
- Press "MODE" to confirm each field and move on: minutes, year, month, date – set each with "PROG".
- Choose English (date then month, default) or American (month then date) calendar with "START/STOP".
- Press "CLEAR" to confirm (or "MODE" to go back to the hours). From time mode, "MODE" shows the calendar for 5 seconds.
Set the Alarm
- Press "MODE" again within the 5 seconds the calendar shows: the AL icon comes on.
- "START/STOP" switches the alarm on or off; the alarm-on icon stays displayed in every mode while it is on.
- Hold "CLEAR" 2 seconds until a beep and the hours flash; set the hours with "PROG" (same 12/24 hour mode as the time).
- "MODE" moves to the minutes; set them with "PROG".
- Press "CLEAR" to confirm, or "MODE" to go back to the hours.
Countup Option
- In timer mode, with the timer stopped, press "CLEAR": the display shows 0:00.
- Press "START": the timer counts up from zero in minutes and seconds to a maximum of 59 mins 59 secs; an arrow icon shows count-up.
- The count-up can be stopped and restarted as many times as required.
The count-up timer only works when the countdown timer is set to countdown and up, not countdown repeat.
Countdown & Up or Countdown Repeat
- Press "MODE" to leave the clock and reach the timer function.
- Stop the timer ("START/STOP") and set the display to zero ("CLEAR").
- Press and hold "SYNC"; while holding it, press "CLEAR" to toggle between countdown and up and countdown repeat (shown by their icons).
- Release "SYNC" to confirm.
Programmed Countdown
| Programme | Countdown & up | Countdown repeat |
|---|---|---|
| 5,4,1,0 minutes | Single period or multiples | Single period only |
| 5 minute periods | Single period or multiples (e.g. 2 × 5 minutes = 10 minutes) | Single period only |
| 3 minute periods | Single period or multiples | Single period only |
| 1 minute period | Single period or multiples | Single period or multiples |
- Alarm: a short sound every minute; in the last minute at 50, 40, 30 & 20 seconds, then every one of the last 15 seconds.
- Choose the programme: timer stopped and at zero, hold "SYNC" and press "PROG"; each press steps 5,4,1,0 → 5 mins → 3 mins → 1 min → 5,4,1,0. The indicators at the top of the display show which programme is selected.
- Set one period (press "PROG" once) or multiples (press "PROG" several times, countdown and up or the 1 minute programme of countdown repeat), then press "START". The countdown can be stopped and restarted as many times as required.
- At zero, countdown and up switches to counting up (up arrow icon) to 59 mins 59 secs, then starts at 0:00 again – elapsed race time, useful in handicap racing. Countdown repeat reverts to the programmed time and counts down again.
- Once the countdown is running only "START/STOP", "SYNC" and "MODE" work. A single beep confirms any button press that has a function.
- Silence the alarm for visual use only: hold "MODE" for approximately 2 seconds until a short bip; the bell icon disappears. Repeat to switch it back on.
SYNC – synchronising with the starter
- "SYNC" only works during a running countdown. If you started late, or even missed the preparatory signal, just start the watch and press "SYNC" on the next signal: the display drops to the next full minute (5:08 → 5:00; 3:35 or 3:59 → 3:00) and keeps counting down.
- The "SYNC" button is deliberately stiffer than the other click-type buttons so it is not knocked by accident.
Changing the Battery
- The series 6 watch has a screw-on case back: unscrew it with a special tool (you may need to visit a watchmaker) to reveal the battery.
- Lift the protective label over the battery: it is required for insulation and must be refitted after the new battery is in.
- Fit a new 3.0 Volt CR2032 Lithium Battery with the +ve contact facing up; do not touch the +ve and -ve contacts at the same time.
- Refit the insulating label, check the battery is correctly fitted and the rubber seal is seated; if possible add some silicon grease or Vaseline to the seal.
- Screw the case back on with the special tool and make sure it seats properly, or water will leak into the watch.
Removing Links from the Stainless Steel Band
- Tool required: 1mm screwdriver or punch.
- Removable links are identified by an arrow embossed on the back of the link.
- Push out the connecting pin in the direction of the arrow, work out how many links to remove, and push out the second pin the same way.
- Discard the un-needed links and rejoin the band by tapping the pin back in the opposite direction to the arrow.
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