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Microcomputer Automatic Bell Timer 

Model: ZYT22-AD 

Be sure to read the manual carefully before using.   
Please safekeeping the manual. 

Function and application 

This product designed with high performance microcomputer   
chip, it can automatically switch on the ring on fixed time, 
and realize automatic ring with max. 80 times one day. It is   
widely used in schools, factories and hospitals etc.   

Display guide 

 

Specifications 

Working voltage: AC180-240V, 50/60Hz, DC12V    Max time length: 23h59m59s 

Load capacity: AC terminal: resistive 2A; DC terminal: 2A 

Power: less than 4W                            Condition temperature: -10-50

℃ 

Dimensions: 195*175*85mm                     Weight: 550g 

Setting: 80 ON/OFF with automatic and manual available 

Error: 0.5s/day with automatic error adjustable functions 

     2s/day without automatic error adjustable functions 

. LCD Guide 

TC PROG ER  TL  MO  TU 

WE 

FR  SA 

SU 

Time 

Clock 

Program Error 

Time 

Length 

Monday

Tuesday

Wednesday

Friday Saturday

Sunday

. Buttons Guide   

6 keys, “MODE”,

SELE

, “+”, “-“, “AUTO/MAN”,” RESET” separately, The function of keys as follows: 

MODE 

To select functional menu. Press it to and enter setting state. Then it can select TC, PROG, 

ER, TL. Press it for 3s, it will return to the clock state. 

SELE 

Parameter optional. Under the function setting state, press it to select the parameter you 

like, and the chosen will flash. 

Parameter up adjust. Upwards number for the chosen parameter. 

Parameter down adjust. Downwards number for the chose parameter. 

AUTO/MAN 

Under the clock state, press “AUTO/MAN” key to select the state: ON, AUTO, OFF; Under 

the program state, press this key, and can cancel current program setting but make it display

“--:--”, press it again to save this setting. 

RESET 

Press it and can cancel all the settings, clock is 00

00

00. 

 

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