SC9711

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

REV:1.1

2007.11.07

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Page 6 of 14

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Pin no.

symbol

Description

Pin no

symbol

Description

46

AGND

3V battery midpoint, analogy

ground.

96

OP1N

AC

signal

buffer

operate

amplifier input pin (-)

47

NC

97

NC

48

2

×1.5V battery positive input

98

OP1O

AC

signal

buffer

operate

amplifier output pin

49

NC

99

NC

50

NC

100

OP2P

AC/Dc switcher OPAMP input

pin

FUNCTION DESCRIPTION

Auto/manual switch RANGE

RANGE is the Push-Type switcher, and set in auto switch at power-on. If pressed RANGE key, it switch into

manual step. In manual states, press it up jumper one step. If jumper from highest step to lowest step, only need

pressed the key for 2 second, automatic switch into auto step. Hz/Duty and CAP because of the measure mode

cannot switch into manual switch mode.

Display hold HOLD

HOLD Key is the Push-Type switcher, use for holding the display data.

Relatively value display REL

REL Key is the Push-Type switcher. Besides Hz/Duty, other measurements have this function, it can automatic

switch into auto switch mode.

Auto power-off

When measure operating more than 15 minutes, and didn’

t switch the measure step (that is didn’

t press the

push button), it will switch into standby mode automatically. If press the select key, auto power off invalidation.

Back Light Control:

When pressed the BLCTR or RANGE more than 2s, B1OUT will be set to “1”, and if press BLCTR again, it will

be cleared.

Beeper

When select

Rel

Hold

Range

HZ/DUTY and BLCTR keys pressed and function switched , the Beeper

On about 0.5~1S. When ACV>750V, DCV>1000V, AC/DC

µA >4000µA, AC/DC mA, AC/DC A>10A, the beeper

will hold ON to indicator the warning of the out of range. At one minute before auto power off, beeper will beep

five times, and before shut down, beep one time.