Introduction
Thank you for purchasing the Seiko QHR020WLH Advanced Technology R-Wave Desk Clock. This digital clock provides precise timekeeping, an automatic calendar, temperature, and humidity readings, along with an alarm function. Its R-Wave technology automatically synchronizes with the atomic clock for accuracy. Please read this manual thoroughly to ensure proper setup and operation.
Important Safety Information
- Do not expose the unit to extreme temperatures, direct sunlight, or high humidity.
- Avoid dropping the unit or subjecting it to strong impacts.
- Do not mix old and new batteries, or different types of batteries.
- Remove batteries if the unit will not be used for an extended period.
- Dispose of used batteries responsibly according to local regulations.
- Do not attempt to disassemble or repair the unit yourself. Refer all servicing to qualified personnel.
Package Contents
Please check that all items are present:
- Seiko QHR020WLH Desk Clock Unit
- 2 x AA Batteries
- Instruction Manual (this document)
Setup
1. Battery Installation
The clock requires two AA batteries for operation. These are included in the package.
- Locate the battery compartment cover on the back of the clock.
- Remove the cover by sliding it downwards or pressing the latch.
- Insert two AA batteries, ensuring the correct polarity (+ and -) as indicated inside the compartment.
- Replace the battery compartment cover.

Image: Rear view of the Seiko QHR020WLH clock, highlighting the battery compartment and control buttons for setup and adjustment.
2. Initial Power-On and R-Wave Signal Reception
Upon battery installation, the clock will automatically attempt to receive the R-Wave (radio-controlled) time signal from Fort Collins, Colorado. This process may take several minutes to several hours, depending on your location and environmental conditions.
- Place the clock near a window, away from electronic devices that may cause interference.
- The signal strength indicator (often an antenna icon) on the display will show if the signal is being received. A solid icon indicates successful synchronization.
- Once synchronized, the clock will automatically set the correct time, date, and day.
3. Manual Time and Date Setting (If R-Wave Fails)
If the R-Wave signal cannot be received or if you need to adjust settings manually, follow these steps:
- Press and hold the SET button (located on the back) for a few seconds until the display starts flashing.
- Use the ADJUST button to change the flashing value (e.g., hour, minute, year, month, day).
- Press the SET button again to confirm the setting and move to the next adjustable item.
- Repeat until all desired settings are configured.
- Press the MODE button to exit the setting mode.
4. Temperature Unit Selection (°C/°F)
To switch between Celsius and Fahrenheit for temperature display:
- Press the °C/°F button (located on the back of the clock). The display will switch between the two units.
Operating Instructions
1. Display Overview
The large LCD display shows various information at a glance:

Image: Front view of the Seiko QHR020WLH clock, illustrating the digital display with time, date, day of the week, temperature, and humidity readings.
- Time: Large digits for hours and minutes.
- Date: Month and day.
- Day of the Week: Abbreviated day.
- Temperature: Current indoor temperature.
- Humidity: Current indoor relative humidity percentage.
- R-Wave Indicator: Shows signal reception status.
- Alarm Indicator: Appears when the alarm is set.
2. Setting and Activating the Alarm
- Press the MODE button repeatedly until "ALARM" or an alarm icon appears on the display.
- Press and hold the ALARM ON/OFF button until the alarm time starts flashing.
- Use the ADJUST button to set the desired alarm hour.
- Press ALARM ON/OFF again to confirm the hour and move to minutes.
- Use the ADJUST button to set the desired alarm minutes.
- Press ALARM ON/OFF to confirm and exit alarm setting.
- To activate or deactivate the alarm, press the ALARM ON/OFF button once. An alarm icon will appear on the display when activated.
3. Using the Snooze Function
When the alarm sounds, press the SNOOZE button (usually a larger button on the top or front) to temporarily stop the alarm. The alarm will sound again after approximately 5-10 minutes (snooze duration may vary). To turn off the alarm completely, press any other button.
4. Viewing Calendar Information
The clock continuously displays the current date and day of the week. No special action is required to view this information.
Maintenance
1. Battery Replacement
When the display becomes dim or the clock stops functioning, it's time to replace the batteries. Follow the battery installation steps in the "Setup" section. It is recommended to replace both batteries at the same time with new AA alkaline batteries.
2. Cleaning the Unit
Wipe the clock with a soft, dry cloth. Do not use abrasive cleaners, solvents, or chemical sprays, as these may damage the casing or display.
3. Optimal Placement for R-Wave Reception
For best reception of the R-Wave signal, place the clock:
- Near a window, facing towards Fort Collins, Colorado (if possible).
- Away from large metal objects, concrete walls, or other electronic devices (TVs, computers, microwaves) that can interfere with the signal.
- Avoid placing it in basements or areas with heavy electromagnetic interference.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No display or dim display | Dead or low batteries; incorrect battery polarity. | Replace batteries with new AA alkaline batteries, ensuring correct polarity. |
| Clock does not synchronize with R-Wave signal | Poor signal reception due to location or interference. | Relocate the clock closer to a window or away from interfering electronics. Allow several hours for synchronization. Manually set time if necessary. |
| Incorrect time or date after synchronization attempt | Temporary signal disruption; time zone not set correctly. | Allow more time for re-synchronization. Ensure the correct time zone is selected (if applicable, refer to manual setting). Press the RECEIVE button to force a signal search. |
| Temperature/Humidity readings seem inaccurate | Unit not acclimated to room; sensor obstruction. | Allow the clock to sit in its desired location for at least 30 minutes to acclimate. Ensure sensors are not blocked. |
| Alarm does not sound | Alarm not activated; alarm volume too low (if adjustable). | Ensure the alarm icon is visible on the display. Check if there's a volume setting (though typically not on this model). |
If problems persist, try performing a full reset by pressing the RESET button on the back of the unit using a pointed object (like a paperclip). This will clear all settings and initiate a new R-Wave search.
Specifications
- Model: QHR020WLH
- Dimensions: 11 x 8 x 2.75 inches (27.9 x 20.3 x 7 cm)
- Weight: 1.39 pounds (0.63 kg)
- Power Source: 2 x AA Batteries (included)
- Display Type: Digital LCD
- Features: R-Wave (Atomic Time), 12/24 Hour Display, Automatic Calendar, Alarm, Snooze, Thermometer (°C/°F), Hygrometer, Folding Stand.
- Material: Plastic (Frame: Resin)
- Indoor/Outdoor Usage: Indoor
Warranty Information
This Seiko product comes with a Limited Warranty. Please refer to the warranty card included in your original packaging for specific terms, conditions, and duration of coverage. Keep your purchase receipt as proof of purchase for any warranty claims.
Customer Support
For further assistance, troubleshooting, or inquiries regarding your Seiko QHR020WLH clock, please visit the official Seiko website or contact their customer service department. Contact information can typically be found on the product packaging or the official brand website.





