STM185 - Weather Station JOHNSON - Free user manual and instructions
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| Type of product | Wireless weather station |
| Brand | Johnson |
| Model | STM185 |
| Display | LCD with backlight |
| Indoor temperature range | 0°C to 50°C (32°F to 122°F) |
| Outdoor temperature range | -40°C to 60°C (-40°F to 140°F) |
| Indoor humidity range | 1% to 99% RH |
| Outdoor humidity range | 1% to 99% RH |
| Barometric pressure range | 850 to 1050 hPa |
| Weather forecast | Sunny, partly cloudy, cloudy, rainy, stormy |
| Wind speed range | 0 to 50 m/s |
| Rainfall measurement | 0 to 9999 mm |
| Clock | Atomic time sync with DST |
| Alarm | Dual daily alarms with snooze |
| Wireless range | Up to 100 meters (330 feet) in open area |
| Power source | Main unit: 2x AAA batteries; sensor: 2x AAA batteries |
| Dimensions (main unit) | 190 x 120 x 22 mm |
| Dimensions (sensor) | 65 x 40 x 110 mm |
| Weight (main unit) | 220 g without batteries |
| Weight (sensor) | 120 g without batteries |
| Maintenance | Clean the outer surfaces with a soft dry cloth |
| Safety | Keep away from water, direct sunlight, and extreme temperatures |
| Spare parts | Replacement outdoor sensor can be purchased separately |
| Manual included | English PDF manual available for free download |
Frequently Asked Questions - STM185 JOHNSON
How do I set up the weather station for the first time?
Place the main unit on a flat surface and insert 2 AAA batteries into the main unit and 2 AAA batteries into the outdoor sensor. The display will light up, and the sensor will automatically sync within 3 minutes.
Why is the outdoor sensor not showing data on the display?
Check that the sensor is powered and within the wireless range (up to 100 meters in open area). Make sure no obstacles like thick walls cause interference. Try pressing the RESET button on the sensor and the main unit to re-sync.
How do I change the batteries?
Open the battery compartment of the main unit or the outdoor sensor, remove the old batteries, and insert new ones respecting the polarity (+/-). After replacement, the device may need a few minutes to resynchronize.
Can I use the weather station without an internet connection?
Yes. The STM185 is a standalone weather station that works without internet. It displays real-time data from the outdoor sensor and uses an internal barometer for forecasts.
How do I read the barometric pressure trend?
The pressure trend is indicated by an arrow on the display. An up arrow means pressure is rising, typically indicating improving weather, while a down arrow means falling pressure, often preceding rain or storms.
What does the moon phase icon mean?
The moon phase icon shows the current lunar phase based on the date and the device's clock. It is calculated automatically and helps you plan outdoor activities.
Can I set the clock manually instead of using the atomic time signal?
Yes. Press and hold the TIME SET button for 3 seconds. Use the +/- buttons to adjust hours and minutes. Disable the atomic sync by holding the DST button until it is off.
How do I reset the rainfall measurement?
Press and hold the RAINFALL button for 5 seconds to reset the total rainfall to zero. This is useful for starting a new tracking period.
What is the recommended maintenance?
Clean the surface of the main unit and sensor with a soft dry cloth. Check the sensor mounting periodically to ensure it is not blocked by leaves or debris, and replace batteries at least once a year.
How do I enable the backlight?
Press the LIGHT button on the top of the main unit to toggle the backlight on or off. The backlight stays on for 10 seconds each time you press it, unless standard power saving mode is active.
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USER MANUAL STM185 JOHNSON
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Product information
Brand : JOHNSON
Model : STM185
Category : Weather Station