ES51983
3 3/4 AUTO DMM
Measurement Mode
V(DC/AC)
Auto
VR2 – VR5
Manual
Control Range
400.0mV – 4000V
Initial Range
4.000V
VRi
VRi
VR5
→
+
→
1,
VR1
µA(DC/AC)
R1 – R2
R1－R2
R1 – R2
400.0µA - 4000µA
400.0µA
40.00mA
R1 → R2,
R2 → R1
R1 → R2
R2 → R1
R1 → R2,
R2 → R1
fixed
mA
(AC/DC)
40.00mA –
400.0mA
Auto A(DC/AC)
4.000A – 60.00A
40.00A
4.000A
40.00A
A(DC/AC)
fixed
ORi
→
Ω
OR1- OR6 ORi
+
1,
400.0Ω – 40.00MΩ
400.0Ω
OR6 → OR1
Continuity
Diode
fixed
fixed
fixed
fixed
400.0Ω
4.000V
400.0Ω
4.000V
Note: Pushing RANGE resets all existing special modes.
3.3 KEY
See Section “Measurement Mode Switching” for the function of this pin.
4. Serial Data Output
The serial data sent to SDO pin twice every A/D conversion cycle. The data format
complies wit JIS 7Bits transmission code with a baud rate of 19230. The host can use
RS232 interface to read the data. A single data packet includes a start bit (always 0), 7
data bits, an odd parity check bit, and a stop bit (always 1). The high and low voltage
levels correspond to DGND and V- respectively. SDO remains at 1 (high) when it is
inactive. Hence the start bit (0) could be used as the triggering the reading process. The
following figure shows the data format of a single packet. The LSB is sent first and the
MSB is sent last.
single package
0V
p
P 1
D0 ~D6
0
-3V
LSB
MSB
One data block consists of 11 packets, or 110 bits. The following figure shows the
format of a data block. The range packet indicates the full scale range of the meter.
Digit 3 through digit 0 are just the digits on the LCD panel. The function packet
indicates the measurement mode of the meter. Status, option 1 and option 2 give the
12
11/01/05
CYRUSTEK [ Cyrustek corporation ]
