Teledyne API Model 200AU NOX Analyzer Instruction Manual, 02293, Rev. F
5-24
Table 5-9: Status Output Pin Assignments
Output # Pin # Definition Condition
1 1,2 ZERO CAL CLOSED IN ZERO CAL
2 3,4 SPAN CAL CLOSED IN SPAN CAL
3 5,6 FLOW ALARM CLOSED IF FLOW WARNING
4 7,8 TEMP ALARM CLOSED IF ANY TEMP WARNING
5 9,10 DIAG MODE CLOSED IN DIAG MODE
6 11,12 POWER OK CLOSED IF SYSTEM POWER OK
7 13,14 SPARE
8 15,16 SPARE
9 17,18 SPARE
10 19,20 AUTORANGE - HI CLOSED IF IN HIGH RANGE
11 21,22 SYSTEM OK CLOSED IF NO FAULTS PRESENT
12 23,24 RX CELL PRESS CLOSED IF ABS PRES > 15" HG
The Status Board schematic can be found in the Appendix Drawing 01087.
5.5 RS-232 Interface The RS-232 communications protocol allows the instrument to be connected to a wide variety of
computer based equipment. The interface provides two basic functions in the M200AU.
1. First is a comprehensive command interface for operating and diagnosing the analyzer.
2. The interface can also provide an audit trail of analyzer events. In this function the port
sends out messages about instrument events like calibration or warning messages. If these
messages are captured on a printer or remote computer, they provide a continuous audit trail
of the analyzers operation and status.