User Manual
Rainfall Alert Mode description 
-  To activate the rain alert mode, slide the Alarm switch to the “On” 
position. A beep alarm will sound for 10 seconds when the rain mode is 
changing. 
-  Rain mode alert description: 
o  No Rain: Average rainfall less than 0.015IN/0.38MM on the past few 
minutes 
o  Light Rain: Average rainfall between 0.015IN/0.38MM to 0.135IN/3.43MM 
on the past few minutes 
o  Heavy rain: Average rainfall equal or over 0.15IN/3.81MM on the past 
few minutes 
-  To turn off an alert mode, slide an Alarm switch to “Off” position. 
Data Transmission 
The display will read the following based on the data being transmitted from the 
rain collector: 
-  The rain gauge will transmits data to the main unit on every 77 seconds 
Low battery indicator and battery changing 
If you see that the low battery indicator(s) has changed to empty status, please 
install fresh batteries as follows: 
Indoor rain monitor 
Remove the old batteries from the battery compartment and insert 2 fresh “AA” 
alkaline batteries. Unit will sync with the outdoor transmitter unit 
automatically. 
NOTE: After battery replacement, if you find any data showing on the indoor rain 
monitor display, it must be accumulated data. Please press the “RESET” button for 
1 second to clear the display and start counting from 00.00IN or 000.0MM. 
Outdoor rain gauge 
To change the outdoor rain gauge batteries, you must press and hold the “RESET” 
button for 5 seconds on the indoor rain monitor and let it re-sync again. 
NOTE: After battery replacement, if you find any data show on the indoor rain 
monitor display, it may an incorrect counting the occurred during the battery 
change. Please press the “RESET” button for 1 second to clear the display and 
start counting from 00.00IN or 000.0MM. 
“ERR” signal occurred on rain monitor display 
When the indoor rain monitor notes an accumulative data out of the display range 
(Maximum inch data is 99.90IN and millimeter data is 999.9MM), the unit will show 
“ERR” signal on the display and sound for 1 minute. Press any key to clear “ERR” 
signal and start from 00.00IN or 000.0MM counting. 
Resetting the outdoor rain gauge and troubleshooting 
The outdoor rain gauge is using a data accumulation method to transmit 
information to the indoor rain monitor. If it is necessary to erase an 
accumulated data on the outdoor rain gauge; 
OR 
In some unusual occasions, the unit may be affected by electrical interference 
and respond abnormally or “ERR” signal occurred. 
In such conditions, you must reset and re-sync both the indoor monitor & outdoor 
rain gauge. If to do so, please follow the “Getting Started (Power reset)” 
procedure. 
NOTE: After reset both the indoor monitor & outdoor rain gauge, if you find any 
data show on the indoor rain monitor display, it may a wrong counting during 
place the batteries on the outdoor rain gauge, please press the “RESET” button 
for 1 second to clear the display and start from 00.00IN or 000.0MM counting. 






