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9060-Zirconia Analyser
11. 'Mains Freq'
The sample of the mains frequency has failed.
12. 'DAC Cal Fail'
The digital to analog and voltage isolator circuit has been found to fall outside the normal
calibration specifications. This check is only performed when the 'AUTO CAL' button is
pressed. Refer to Section 6.3.
13. 'Probe Filter
Blocked probe filter. This test is only performed when automatic purging of the probe is
selected. Refer to step 53 in the set-up menu Section 5.5. This alarm will not reset until
the next purge cycle that can be initiated manually or automatically.
14. 'Gas 1 Cal Err'
Probe does not correctly calibrate to calibration check gas 1.
15. 'Gas 2 Cal Err'
Probe does not correctly calibrate to calibration check gas 2.
16. 'Burner bypass'
The safety interlock relay has been bypassed by turning on the 'BURNER BYPASS'
switch on the terminal printed circuit board. Refer to Section 3.19
17. 'Oxygen Deviation High'
The oxygen as read by sensor 1 differs from the oxygen read by sensor 2 by an amount
greater than the level set in step 75 in the set-up menu Section 5.5, for a period longer
than that set in step 76. This alarm is only available if 'Two Sensors' is selected in set-up
1.
18. 'Watchdog Timer'
Microprocessor error. This alarm will not appear on the display. The common alarm relay
will be forced open circuit.
If the watchdog timer senses a malfunction in the microprocessor, it will attempt to reset
the transmitter every 2 seconds. After two resets the alarm relay contacts will go open
circuit.
19. 'BBRAM Fail"
The battery backed memory module has failed in service. The device normally lasts 10
years. It is the plug-in battery like module on the 1630 -1 board, labelled M1.
20. 'Htr SSR Fail"
One of the two solid state relays that drive the heaters in the oxygen sensors has failed.
The electro-mechanical relay RL7 will cut off the heater to prevent further damage.
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