Teledyne 9060 - Zirconium oxide flue gas oxygen analyzer - Manual (Page 48)

9060-Zirconia Analyser
4.3.2 SUMMARY OF ALARMS - SELECTABLE ALARMS
There are three user configurable alarm relays. Any or all of the following functions can be
selected for each relay.
NOTE: The process alarms will only be activated if enabled in set-up 70.
21. ‘O2% Low’
The measured oxygen level is below the level set in set-up 73, and the alarm delay set in
set-up 74 has expired. See step 64 in the set-up menu Section 5.5 for more details.
22. ‘O2% Very Low’
The measured oxygen level is below the level set in set-up 77, and the alarm delay set in
set-up 78 has expired. See step 66 in the set-up menu Section 5.5 for more details.
23. ‘O2% High’
The measured oxygen level is above the level set in set-up 71, and the alarm delay set in
set-up 72 has expired. See step 62 in the set-up menu Section 5.5 for more details.
24. ‘Probe Temperature’
The probe temperature is under 650
°C (1200°F). The oxygen reading is therefore invalid.
If the probe heater has been on for more than 20 minutes and the temperature is less than
650
°C (1200°F) a ‘heater fail’ alarm will occur.
NOTE:
The ‘Probe Temp’ relay function is used with unheated probes to indicate oxygen reading
is invalid (the probe is below 650°C (1200°F) ), in case the process temperature falls
below this level. With heated probes this relay will be de-energised while the probe is
heating up from ambient, making the contacts open circuit.
25. ‘Cal in Progress’
A calibration check is occurring, either manual ( in RUN mode) or automatic
Probe Purge
A probe purge is occurring, either manual ( in RUN mode) or automatic
26. Alarm Horn
This is not an alarm condition. If one of the three user configurable alarm relays have
‘Alarm Horn’ enabled; the relay will have closed contacts only when there is an unaccepted
alarm on the transmitter. Press the alarm button twice to accept any new alarm and to
cancel the horn relay. This is only available on relay 4.
4.3.3 ALARM RELAYS
The alarm relays are fail safe. That is, the contacts will be closed during normal operation,
and will be open circuit if there is an alarm or if the power is removed from the transmitter.
4.4 POWER LAMP
Illuminates when power is connected to the transmitter. If the lamp is flashing, the
watchdog timer is attempting to reset the microprocessor. Replace the 1630-1
microprocessor PCB.