Elma 795
UK 41
v. 290817
06-09-2016 10:40:26
14. RS232 PC SERIAL INTERFACE
The instrument has RS232 PC serial interface via a 3.5 mm terminal (3-19, Fig. 1 ).
The data output is a 16 digit stream which can be utilized for user's specific application.
A RS232 lead with the following connection will be required to link the instrument with the PC serial port.
.Meter
PC
(9W 'D" Connector)
Center Pin………………Pin 4
(3.5 mm Jack plug)
Ground/shield
…………. Pin 2
2.2 K resister
Pin 5
The 16 digits data stream will be displayed in the following format:
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Each digit indicates the following status:
D15
Start bit
D14
4
D13
When send the upper display data = 1
When send the lower display data = 2
D12, D11
Annunciator for display
0
C = 01
0
F = 02 % = 03 PH= 05 % 2= 06 mg/L= 07 uS = 13 mS=14 mV = 18 PPM = 19
D10
Polaritet
0 = Positiv 1 = Negativ
D9
Decimal Point(DP), position from right to the left
0 = No DP, 1= 1 DP, 2 = 2 DP, 3 = 3 DP
D8 to D1
Display reading, D1 = LSD (least significant digits), D8 = MSD (most significant digits)
If the display reading is 1234,
then D8 to D1 is: 00001234
D0
End bit
RS232 FORMAT: 9600, N, 8, 1
Baud rate
9600
Parity
No parity
Data bit no.
8 Data bits
Stop bit
1 Stop bit
