49. ALARM RELAY #2
Any or all of the following alarm functions may be used to activate the alarm relay. They may be selected or de-
selected using the ‘ENTER’ buttons as in set-up step 29.
Options :
1. Low oxygen
2. High oxygen
3. Very low oxygen / Filter fail
4. High carbon dioxide
5. Low carbon dioxide
6. Oxygen sensor under temperature
7. Oxygen calibration gas check in progress
50. ALARM RELAY #3
Alarm relay #3 has the same functions available as alarm relay #2. See set-up 49.
51. ALARM RELAY #4
Alarm relay #4 has the same functions available as alarm relay #2. See set-up 49.
In addition an alarm horn function is also available.
If ‘Horn’ is selected it will override any other selections. A relay selected as a ‘Horn’ driver will have the relay
contacts open circuit if there is an un-accepted alarm, and closed when a new alarm occurs.
52. SERIAL COMMUNICATIONS
The RS232/RS485 serial port can be used to log selected data at a minimum 1 minute interval to a printer (see set-up
54) or can be selected to log -Seconds today, Oxygen sensor EMF, Oxygen level, Carbon dioxide level.
The data log period can be set from 5 seconds to 1200 seconds (20 minutes)
Options :
1. Printer *
2. Data logger
53. DATA TO PRINT
Any or all of the following values may be printed on a printer or computer connected to the serial port. They may be
selected or de-selected using the ‘ENTER’ buttons as in set-up step 29. The log period follows in set-up step 54. A
sample of a print-out is contained in Appendix 3. RS to 232C protocol is :
Data word length Eight bits
Stop bits One
Parity None
Oxygen is always printed, plus any of the following
Options :
1. Run hours since last service
2. Date of last service
3. Oxygen Sensor mV
4. Oxygen Sensor temperature
5. Oxygen Sensor impedance
6. Sample oxygen sensor (and carbon dioxide if fitted)
7. Ambient temperature
8. Relative humidity
9. Balance gas
54. PRINT LOG PERIOD
Select the time interval between data print outs on the printer.
Range: 1 to 2000 minutes
55. PRINTER BAUD RATE
Select the correct BAUD rate for data to be transmitted out of the port to the printer.
Options:
300
1200
2400
4800
9600
56. REFERENCE AIR PUMP SELECTION
Teledyne Analytical Instruments 9070 Oxygen Analyzer Page 39
