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The analog output is automatically scaled to the range of the instrument, i.e. if the monitor range is 1000 PPB, then 5V would correspond to 1000 PPB and 0V would correspond to 0 PPB. See Section 7.2.5 for information on changing the range of the monitor.
4.5.3.Status Outputs
There are four instrument status outputs located at the “General I/O” connector. These status outputs mirror the state of the four diagnostic LED’s on the front panel. If any of these status outputs are in a different state than shown in Table
Electrically these outputs are SPST dry contact relay closures with a common contact, labeled ‘C’ on the rear panel. They are capable of switching up to 50 VDC, 250mA maximum current. There are no polarity requirements, so the outputs can be used to sink or source current from the ‘C’ pin, within the maximum voltage and current specified. Schematically, the outputs look as shown in Figure
Figure 4-8: Status Output Schematic
The outputs are defined as follows:
Table
Status | Name | Normal Operating |
Output # |
| State |
1 | Sensor OK | On |
2 | Invalid Reading | Off |
3 | Check Lamp | Off |
4 | Pneumatic Error | Off |
P/N 06160D DCN6409 Teledyne API Model 465M O3 Monitor Instruction Manual - Page 24