User's Manual

MI-2531
Indoor main unit of Full Weather Station Rev (0) Dated 16/8/05
Microtech Components Ltd. Room 21, 10/Fl., Leader Industrial Building, 57-79 Au Pui Wan St., Fatan, Hong Kong
Tel : [phone] Fax : [phone] Email : [e-mail]
2/5
11) Total 8 key :
MAX(+), MIN(-), DISPLAY(RECORD), CLEAR(EXIT), SETUP(ON/OFF/PRESSURE)
ALARM, CHANNEL(WAVE), SNOOZE
3. FUNCTION DESCRIPTION
3-1. POWER ON or RESET
When Power on or reset the LCD will full display for 5 seconds, the main unit will measure indoor
temperature, indoor humidity and air pressure during this 5 seconds, then it will show the temperature,
humidity value and time (default is 01/01-2005,12:00AM at EST time zone) on LCD, all of the outdoor
value will be shown ---, forecast area will show cloud with blinking, pressure bar area will be clear,
pressure area will show “0 METER” with METER icon blinking, it ask user to input the altitude of the
station, you can press (+) or (-) key to select METER or FEET unit, then press SETUP key to set the
altitude (the METER or FEET icon will become static and the “0” digit will blink), press (+) or (-) to
increase or decrease the altitude with 10meter(or feet) per step, the range is from -100 to 2500 meter
(or from -330 to 8250 feet). After setting the altitude, press SETUP key to confirm and go into weather
setting(or press CLEAR to quit the initial setting with the cloudy weather), press (+) or (-) to set the
current weather, then press CLEAR to quit the initial setting. If no key was pressed for 30 seconds, it
will quit initial setting automatically with the status shown on the LCD.
When completed the initial setting, it will begin to search the RF433 signal from outdoor transmitter.
When turn on the rf433 module, the antenna icon will be waving to indicate signal is being picked up.
When a certain signal is picked up and decoded successfully, it will be shown on LCD, and the main
unit will turn off the rf433 module for 3 seconds, then to pick up next signal, the search time is maximum
6 minutes. When maximum 5 different signal is searched, it will quit search mode and go into normal
mode. If the RCC signal had been received and decoded successfully, the antenna icon will be full
display and the OK and WAVE icon will be light up. If no RCC signal is detected, the antenna icon will
be blinking, WAVE and OK icon is disappeared. If any RCC signal had been detected (but no all), the
antenna icon will be blinking, the WAVE icon is light up but the OK icon is disappeared. During the
signal picked up period, the antenna icon will change to waving form.
The HEAT INDEX will be calculated from the temperature and humidity value in MI2530.
The WIND CHILL will be calculated from the temperature value in MI2530 and the wind speed
value in MI2529.
The DEW POINT will be calculated from the temperature value in MI2530.
3-2. REVIEW THE MESSAGE
3-2-1 In normal mode, press DISPLAY to view and toggle the display in cycle:
WIND CHILL Æ HEAT INDEX Æ DEW POINT Æ(if rain gauge is added) Rain in last hour
Total rain since last “clear” Rain in user defined days Å Rain in last 24 hours
- At the total rain status, press & hold the CLEAR key for 3 seconds can clear the total rain record.