Appendix D
Appendix D
D-17
the LI-7500 to transmit a data record. The length of time that CTS must be held low is very
short ( ~50 microseconds).
Users familiar with programming RS232 interfaces may already understand that RS-232 logic
TRUE (1) is considered a low (or negative) voltage and logic FALSE (0) is considered a high
(or positive) voltage. Thus, the CTS toggle sequence would look like:
~50
µ
sec
+V (logic 0)
0V
-V (logic 1)
Data record is sent when CTS is high
The CTS line is the gray conductor found on the LI-COR RS-232 Cable, part #392-05620.
The RS-232 serial pinout from a DB9 connector on an AT style computer is defined as:
Summary of Contents for LI-7500
Page 1: ...Analyzer Environmental Division Instruction Manual 7500...
Page 2: ...Open Path CO2 H2O Analyzer Instruction Manual...
Page 41: ...Section 3 3 12 Setup and Operation...
Page 43: ...Section 3 3 14 Setup and Operation...
Page 46: ...Section 3 Setup and Operation 3 17...
Page 50: ...Section 3 Setup and Operation 3 21 Inputs Page Temperature Pressure and Auxiliary Inputs...
Page 56: ...Section 3 Setup and Operation 3 27...
Page 58: ...Section 3 Setup and Operation 3 29...
Page 67: ...Section 3 3 38 Setup and Operation...
Page 70: ...Section 3 Setup and Operation 3 41...
Page 107: ...Section 6 6 6 Troubleshooting...
