Sper Scientific 840064 Vacuum Meter - Manual (Page 6)

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3-H. RS232 PC SERIAL INTERFACE
The unit features an RS232 output via 3.5 mm Terminal. The output is a
16 digit data stream which can be utilized by user's specific application. An
RS232 lead with the following connection will be required to link the
insrument with the PC serial input.
Meter (3.5 mm jack plug) PC (9W "D" Connector)
Center Pin Pin 2
Ground/Shield Pin 5
The 16 digit data stream will be displayed in the following format.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1
DO End Word
D1 to D8 Display reading, D1=LSD, D8=MSD
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
Annunciator for Display
Psi = 23
mbar = 86
uHg = 77
mm/Hg = 78
Pa = 87
torr = 90
inch/Hg = 25
K Pa = 88
D13 1
D14 4
D15 Start Word
RS232 FORMAT: 9600, N, 8, 1
D11 & D12