ES51977
3 3/4 AUTO EASY
HOLD :
1 push
RESET
(Automatic)
Data
Hold
(1) Under auto mode，press the HOLD function，the mode will change to
manual mode and stay at the same scale range.
(2) If continue to press the HOLD pin(logic low)then power on the
ES51977, all the segments will blight until release the HOLD pin.
Auto-Power-off function
Once power on the ES51977, the auto-power-off function will be enabled
and if the functions are not changed in 30 minutes, the auto-power-off condition
will happen and SLEEP pin output will change from +3V to –3V. When power-
off happens, the final data is saved.. If continue to press RANGE or SET or KEY pin
then power on the ES51977, the auto-power -off function will be disabled , and LCD
segment "APO" will be turned off.
(3) Buzzer
The BUZZER turns on in the following condition :
•1 beep : Measurement function changed ,power and re-power on ,
RANGE , HOLD, SET or KEY are pushed.
• 3.3 beeps : Input reading overrange. (except diode, ohm, continuity,
frequency function used)
• 2.0 KHZ continue: Continue check (Bargraph number<=3).
• 2.0 KHZ continue 1.5 sec : Auto-power-off.
BUZZER output waveform :
2.0 KHz ( continued )
0.5 mS
beeps (3.33 beeps/sec)
0.15 sec
0.3 sec
12
92年8月4日
CYRUSTEK [ Cyrustek corporation ]
