ES51932
22,000 Counts Auto DMM
47
48
49
50
51
52
53
54
55
56
57
58
CA+
R9K
R1K
IO Positive auto-zero capacitor connection for capacitor measurement
O
O
O
O
O
O
O
I
Connect to a precise 9KΩ resister for capacitor measurement.
Connect to a precise 1KΩ resister for capacitor measurement.
Minimum peak hold output
PMIN
PMAX
LPFC1
LPFC2
LPFOUT
LPFC3
BUZIN
SLEEP
FREQ
Maximum peak hold output.
Capacitor C1 connection for internal low-pass filter
Capacitor C2 connection for internal low-pass filter
Capacitor C1 connection for internal low-pass filter
Capacitor C3 connection for internal low-pass filter
Pull to V- to enable the BUZOUT.
I
O
I
Sleep mode indicator, asserts low in SLEEP mode.
Frequency counter input, offset V-/2 internally by the chip.
LCD segment line 01 – 32
LCD backplane 4
LCD backplane 3
LCD backplane 2
LCD backplane 1
Square wave output at the backplane frequency, synchronized to BP1.
ANNUNC can be used to control display annunciator. Connect a
LCD segment to ANNUNC to turn it on; connect an LCD segment to
its backplane to turn it off.
59 - 90 SEG32 – SEG01
O
O
O
O
O
O
91
92
93
94
95
BP4
BP3
BP2
BP1
ANNUNC
96
97
98
99
HOLD
RANGE
REL_ZERO
KEY
I
I
I
I
Pulse to V- to enable HOLD function.
Pulse to V- to enable manual mode and manual range selection.
Pulse to V- to enable Relative function or Zero function.
Pulse to V- to change mode. In ADP mode, if this pin is connected to
V-, the buzzer output will be off when the ADP input overflows.
Pulse to V- to enable MAX/MIN function.
Pulse to V- to enable Peak Hold mode.
Back light function. Pulse low to set BKOUT pin output.
Pulse to V- to enable VAHZ mode.
Outputs a 2KHz audio frequency signal for driving piezoelectric
buzzer when BUZIN is low.
100
101
102
103
104
MAX/MIN
PEAK
BKLIT
VAHZ
BUZOUT
I
I
I
I
O
105
BKOUT
O
If BKLIT function is enabled, this pin will change from –3V to +3V
For 60 sec, once press BKLIT pin again within 60 sec, this pin will
Change back to –3V.
106
107
108
109
110
OSC2
OSC1
SCLK
SDATA
μPLCD
O
I
I
I
I
Crystal oscillator output connection
Crystal oscillator input connection
Clock signal input for programmable LCD segment display.
Serial data input pin for programmable LCD segment display.
Enable pin for programmable LCD segment display and SDO output
enable
111
112
113
114
RS232
APOSEL
BKSEL
VST
I
I
I
I
Assert low to enable serial data output.
Idle time selection for auto power off feature.
Set to V- to change the backlight idle time from 60 sec. to 180 sec.
Set to V- to enable the auto range voltage mode to start from 220.00V
range.
115
SHIFT
I
Assert low to enable LCD SHIFT future, only works in 220MΩ, and
all capacitor measurement ranges
116
117
118
119
120
121
122
CESEL
SLACDC
FC5
I
I
I
I
I
I
I
CE selection feature control pin.
Select initial state.
Switch 5 for function selection.
Switch 4 for function selection.
Switch 3 for function selection.
Switch 2 for function selection.
Switch 1 for function selection.
FC4
FC3
FC2
FC1
Ver. 1.2
4
10/05/27
CYRUSTEK [ Cyrustek corporation ]
