11. RS232 PC SERIAL INTERFACE
The instrument has RS232 PC serial interface via a 3.5
mm terminal ( 3-12, 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
resistor
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 :
D0
End Word = 0D
D1 & D8
Display reading, D8 = MSD , D1 = LSD
For example :
If the display reading is 1234, then D8 to
D1 is : 00001234
D9
Decimal Point(DP), position from right to the left
0 = No DP, 1= 1 DP, 2 = 2 DP, 3 = 3 DP
D10
Polarity
0 = Positive
1 = Negative
D11 & D12
Annunciator for Display
mT = E3
G = B5
D13
When send the upper display data = 1
D14
4
D15
Start Word
20
