The Chouchin CH-899 is a precise radio-controlled (or "atomic") clock movement designed to synchronize automatically with national time signals, such as the MSF in the UK or WWVB in North America . While it is built to be "set it and forget it," environmental factors or battery changes can sometimes require manual intervention. Quick Setup Guide (Automatic Setting) For most users, the clock will set itself within a few minutes to a few days if given the right conditions. Select Your Time Zone: Locate the switch on the back. Set it to your zone (e.g., P for Pacific, M for Mountain, C for Central, E for Eastern). Set DST: Ensure the Daylight Savings Time (DST) switch is in the ON position unless you live in an area that does not observe it. Insert Battery: Use one fresh 1.5V AA alkaline battery. Tip: Insert the battery late in the evening (after 10:00 PM), as atmospheric conditions improve signal reception at night. Wait for 12:00: After battery insertion, the hands will spin quickly and stop exactly at 12:00. The clock is now searching for a signal. How to Manually Set the Time If you are in a "dead zone" or need the clock immediately, follow these steps to override the atomic signal: Enter Manual Mode: Press and hold the M. SET button for approximately 3 seconds. Advance the Hands: Quick Advance: Keep holding the M. SET button; the hands will begin to spin rapidly. Fine Tuning: Release the button just before your desired time, then press it repeatedly to advance the minute hand one minute at a time. Confirm: Once the correct time is reached, stop pressing the button. If it is not pressed for 7 seconds, the clock will automatically exit manual mode and begin keeping time as a standard quartz clock. Troubleshooting & Signal Tips Force a Signal Search: If the time is slightly off, press and hold the REC button for 3 seconds. The hands will return to 12:00 and attempt a fresh signal reception. Placement Matters: Place the clock near a window, preferably facing toward the signal source (e.g., Fort Collins, Colorado for US users). Electronic Interference: Keep the clock at least 2 meters (about 6 feet) away from TVs, computers, or microwaves, which can jam the radio signal. Hard Reset: If the movement becomes unresponsive, remove the battery for at least 10 seconds. You can also "clear memory" by inserting the battery backward for 5 seconds before re-inserting it correctly. For further technical details, you can download the official instruction sheet from School Fix. Are you having trouble with a specific time zone or a low battery indicator? title: radio controlled atomic clock instructions & troubleshooting
Chouchin CH-899 Go to product viewer dialog for this item. is a radio-controlled quartz clock movement designed to synchronize automatically with atomic time signals (such as WWVB in North America or MSF in the UK) School Fix Initial Setup Select Time Zone & DST : Before inserting the battery, set the Time Zone switch to your local zone (e.g., P, M, C, E for Pacific, Mountain, Central, Eastern) and ensure the DST (Daylight Savings Time) switch is in the desired position. Insert Battery : Use one fresh 1.5V AA alkaline battery . Do not use rechargeable batteries. Automatic Signal Search : Upon battery insertion, the hands will fast-forward and stop at (or sometimes 4:00 or 8:00) while the clock searches for a signal. This process typically takes 3–10 minutes but can take up to several days in poor reception areas. School Fix Manual Time Setting If a signal cannot be reached, you can set the time manually: Enter Manual Mode : Press and hold the button for approximately Adjust Time Rapid Advance : Keep holding the button to move the hands quickly. Incremental Advance : Press and release the button quickly to move the hands by one minute at a time. : Stop pressing the button once the correct time is reached. The clock will automatically exit manual mode and resume normal operation after about of inactivity. TLC Electrical Supplies Manual Signal Reception (Forced Sync) To manually trigger a signal search (e.g., after relocating the clock): Press and hold the button for at least The hands will return to the 12:00 position and begin scanning for a new signal. TLC Electrical Supplies Troubleshooting & Maintenance Howard Miller Radio Controlled Clock Operating Instructions
CH-899 Chouchin Radio Controlled Clock — User Manual (Concise Guide) Overview The CH-899 Chouchin is a radio-controlled wall/desk clock that automatically synchronizes time via the standard longwave time signal (e.g., WWVB / DCF77 / MSF depending on model/region). It offers automatic time setting, adjustable alarms, backlight, and basic calendar functions. What's in the box
CH-899 Chouchin clock Stand (for desk placement) and wall-mount slot Button-cell batteries (specify included model) or AA batteries depending on variant Quick-start insert / warranty card ch-899 chouchin radio controlled clock manual
Battery installation
Open the battery compartment on the back. Insert the required batteries with correct polarity (+/−). Replace the cover and wait ~1–2 minutes for initial startup.
Initial setup & automatic time sync
Place the clock near a window or away from electronic interference for best radio reception. On power-up the clock will attempt to receive the radio time signal automatically (this can take several minutes, up to an hour in weak-signal areas). Successful reception is usually indicated by a signal icon or an “RC” / antenna indicator on the display.
Manual time setting (if radio signal unavailable)
Press and hold the "Mode" or "Set" button until the hour digits flash. Use the "+" / "−" (or up/down) buttons to adjust the hour. Press "Mode"/"Set" to move to minutes; adjust similarly. Press "Mode"/"Set" again to confirm and exit. The Chouchin CH-899 is a precise radio-controlled (or
Time zone & daylight saving settings
To select the time zone, press the "Time Zone" or similar button while in time mode; cycle through available offsets (e.g., UTC±0, ±1, etc.). For daylight saving time (DST), toggle the DST setting on or off; when on, the clock will add one hour during DST periods (some models auto-adjust via the radio signal).
