Rs232 Interface - VOLTCRAFT LX-2000 Mode D'emploi

14. RS232 interface

The meter is fitted with a serial interface for exchanging data with a computer. This can be found on the right side
under the lid. The interface is in the form of a 3.5 mm jack plug socket and requires a compatible data cable, which
is an optional extra.
The data cable has the following components:
Jack plug 3.5 mm mono
Centre contact →
External contact →
The serial data signal is made up of 16 Bits in the following order:
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Each data bit has the following function:
D15 Start symbol
D14 4
D13 1 = top display line, 2 = bottom display line
D12+D11 Displayed unit of measurement: 01 = °C, 02 = °F, 15 = lux, 16 = ft-cd
D10 Polarity; 0 = positive, 1 = negative
D9 Decimal point (DP) at the appropriate place (right to left);
0 = no DP; 1 = 1 DP; 2 = 2 DP; 3 = 3 DP
D8 to D1 Reading (D8 = largest digit (MSD), D1 = lowest digit (LSD)).
With a display of 1234, the following bit rate (D8 - D1) results: "00001234"
D0 End signal
The RS232 data format is:
Baud rate:
Parity bit:
Data bit number:
Stop bit:
42
9 pol. Sub-D socket for PC (serial port)
Pin 4
Pin2
A 2.2 KOhm is required between pin 2 and pin 5.
9600, N, 8, 1
9600
No parity bit (N)
8
1 stop bit