ETT ET-BIG CLOCK BOX, Manual

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Manual of ET- BIG CLOCK BOX
14) Press Key to stop Alarm sound and it also clears the state of Alarm at Pin Out of Connector Alarm Out to become Logic ‘0’
instead.
NOTE: When setting Alarm, especially in a part of Time, it will be set the RTC DS3231; so, it has to provide Battery Backup
for the Clock because the setting values still remain although Power-OFF.
7.10) HOW TO USE TEMP SENSOR DHT22 (ET-SENSOR AM2302):
This Model Temp DHT22 is connected to measure Temperature and percentage of Humidity from external device and the
Clock will read the value to show on Display. Please follow these instructions below;
1) Connect Temp Sensor DHT22 at Connector Con-DHT22 Temp that is Box 5 Pin type as shown below;
2) Connect 12V Power Supply to the Clock.
3) When the Clock enters normal display mode, please press Key to see the Temperature value and press Key to see the
percentage of Humidity value;, or user may press Key to see both values alternately.
If it is not connected to any Temp DHT22, the display, especially in the part of percentage of Humidity, will show the value as
0.0%. However, the Display still shows the value of Temperature as normal because the Clock reads the Temperature value of Temp
Sensor from internal RTC DS3231 instead.
NOTE: While the Clock is running and user connects or removes any Temp Sensor, user always resets the Clock to check if the
connection with Temp Sensor and all values are read to be shown on the Display are correct.
7.11) HOW TO USE STOP WATCH:
The display format of Stop Watch is arranged in a order of Minute (00-59): Second (00-59): 1/100 Second (00-99),
respectively, with Resolution of 10mS. The maximum timing of Stop Watch is 60 minutes. When Key-9 is pressed, it enters Mode
Stopwatch and the display screen shows the Start Time as 00:00:00. It can show the maximum timing as 59:59:99; when the Clock