< 12. Troubleshooting >
12-7
IM 11M12D01-01E
12.2.2 Alarm Displays
By touching the alarm icon when an alarm is generated, detailed alarm descriptions can be displayed.
Use the Next key to move to the next page if the alarm descriptions are displayed in multiple pages.
On the detailed alarm description display, touch the Update key to update the alarm occurrence
condition. When an error and an alarm occur at a time, an error icon takes precedence.
Warmup
Tag:
Ch1
100%
Ch2
0.96
%
Ch3
749
°
C
Ch4
648°C
Ch5
749
°
C
Ch6
0.96
%
Ch7
749
°
C
Ch8
755
°
C
Hold
F12-6E.ai
Alarm Icon
Channels Where Alarms Occur (displayed in red)
Tag:
Alm6: Process gas
Alm7: Cal gas press low
Ch1 Alm1: Oxygen
Ch2 Alm2: Zero conc. ratio
Ch3 Alm3: Span conc. ratio
Ch4 Alm5: C.J. temp.
Ch5 Alm4: Cal. time over
F12-7E.ai
Figure 12.6 Alarm Displays on
Multi-channel Display
Figure 12.7 Alarm Descriptions
12.2.3 Remedies when Alarms are Generated
1) Alarm 1: Oxygen concentration alarm
See Section 8.2, “Setting Oxygen Concentration Alarms.”.
2) Alarm 2: Zero calibration coefficient alarm
In automatic or semi-automatic calibration, Alarm 2 is generated when the zero correction ratio is out
of the range of 100 ± 30% (refer to Subsection 9.1.3, “Compensation”).
The following are possible causes of this alarm.
1) The zero-gas oxygen concentration does not agree with the value of the zero-gas concentration
set in “Calibration setup”. Otherwise, the span gas is used as the zero gas.
2) The flow rate of the zero gas is out of the specified range (600 ± 60 ml/min).
3) The sensor assembly is damaged and so cell voltage is not normal.
<Locating cause of failure, and countermeasures>
1) Check that the following have been set up correctly. If not, correct them. Then, recalibrate the
channel.
* Check the preset zero gas concentration on the [Calibration setup] display. The displayed concentration value has agreed with
the concentration of the zero gas actually used.
* The piping for calibration gases has been constructed so that the zero gas does not leak.
2) If the alarm is not generated during the recalibration, improper calibration conditions are
considered as the cause of the alarm generated in the previous calibration. In this case, no
particular restoration is necessary.
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