Wide-Screen Weather Forecast RF Clock with Thermometer - User Manual - Model JM828WF / JM828WFU

Oct 23, 2026

Wide-screen radio-frequency (RF) weather forecast clock user manual describing how the JM828WF (Europe) and JM828WFU (UK) versions synchronize time and date via DCF77 or MSF60 signals. Instructions cover major controls, snooze and alarm behavior, extra-large display information including temperature, and battery replacement using four UM4 or AAA cells. It explains radio reception status indicators, enabling/disabling auto reception, and manual time/calendar setup with multi-language day abbreviations. Additional sections address alarm and pressure trend/weather forecasting functions.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages7

Reading Time18 min

AccessFree to download

Introduction

Main Features

Battery Information

About Radio Reception

Time Display Modes

Calendar and Alarm Time Display

How to Set the Calendar Clock Manually

To Set and Activate the Alarm

Alarm and Snooze Function

Wide-Screen Weather Forecast RF Clock with Thermometer Model: JM828WF / JM828WFU User Manual WIDE-SCREEN WEATHER FORECAST RF CLOCK WITH THERMOMETER MODEL: JM828WF (Europe Version) JM828WFU (UK Version) USER MANUAL | INTRODUCTION | | --- | | Congratulations for purchase of the JM828WF Weather Forecast RF Clock.
The JM828WF is a multifunction Radio Frequency (RF) controlled clock. When brought within radio signals generated from Frankfurt, Germany (DCF77) (Model JM828WF) or from Rugby, UK (MSF60) (Model JM828WFU), the unit will automatically synchronize with the current time and date.
The JM828WF can indicate weather forecasts and pressure change trends.
Other features include a daily crescendo alarm with an eightminute snooze function, and extra-large display. | | MAIN FEATURES | A SNOOZE BUTTON Activates the snooze function B RADIO RECEPTION SIGNAL Indicates the condition of radio reception C EXTRA-LARGE DISPLAY Displays the time, date, alarm status, and temperature D ALARM ON ICON [ ] Appears when the alarm is activated E ALARM ICON [ ] Appears when the alarm time is displayed F BATTERY LOW (BATT) INDICATOR Lights up when the batteries are running dry G UP [ ] AND DOWN [ ] BUTTONS Increases or decreases the value of a setting H CLOCK BUTTON Toggles the calendar clock display modes or activates the calendar clock setting mode I ALARM BUTTON Displays the alarm time or sets the alarm status J TREND INDICATOR Indicates the trend of pressure changes K WEATHER FORECAST Indicates the change of weather pattern L SENSOR For indoor temperature reading M RESET BUTTON Resets the unit by returning all settings to their default values N BATTERY COMPARTMENT Accommodates four UM4 or AAA-size batteries O ALARM Speaker alarm P TABLE STAND For mounting the unit on a flat horizontal surface Q WALL-MOUNT HOLE For mounting the unit on a wall 1 EN BATTERY INFORMATION The unit requires four UM4 or AAA-size batteries for operation. How to insert batteries: 1. Press the door tab and click open the door. 2. Insert the batteries strictly according to the polarities shown therein. 3. Replace the door until it clicks in place. Replace the batteries when the battery low indicator lights up. ABOUT RADIO RECEPTION The JM828WF is designed to automatically synchronize its current time and date when brought within range of the DCF77 or the MSF60 (Model JM828WFU) RF signal. When the unit is within range, its radio-control mechanism will override all manual settings. When the unit is receiving radio signal, the reception icon will start to blink. The reception icon will show either strong, weak or no signal depending on the strength of the radio signal. A complete reception generally takes about two to 10 minutes. | Receiving radio signal |

No signal |

Weak signal |
Strong signal | | --- | --- | --- | --- | When the reception is completed the reception icon will stop blinking. The reception icon will show [ ] for no reception or [ ] for successful reception. | Reception complete |
No reception, or manually adjusted |
Successful reception | | --- | --- | --- | For better reception of radio signals, place the clock away from metal objects and electrical appliances to minimize interference. To disable the auto-reception feature, hold down the [ ] and [ ] buttons simultaneously for two seconds. The Antenna Icon [ ] will appear but it will not blink. The unit will NOT respond to radio signals. To enable the feature again, hold down the buttons again. The Antenna Icon [ ] signal will start blinking to initiate reception automatically. Note: Interference from sources such as TV sets can affect the signal. If, after batteries have been inserted for ten minutes, the DCF-77 signal is not received, then set the time manually (see below, How To Set The Calendar Clock Manually) . TIME DISPLAY MODES When the calendar is dis

FAQs

How does the JM828WF/JM828WFU automatically synchronize time and date?

It synchronizes when brought within range of the RF signal: DCF77 for the JM828WF (Europe) or MSF60 for the JM828WFU (UK). Manual settings are overridden while the radio-controlled mechanism is receiving the signal.

What do the radio reception indicators mean?

While receiving, the reception icon blinks and reflects strong, weak, or no signal. After completion, the icon stops blinking and shows whether reception was successful or not.

How do I set the calendar clock manually if the radio signal is not received?

After the calendar is displayed, hold CLOCK for two seconds so the month digits blink. Use the up/down buttons to set the month, press CLOCK to confirm and move through day and then hour/minute settings, including choosing the weekday abbreviation language.

Oct 23, 2026

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