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7 Appendix
AL2
Type:
Main alarm
Adjustable:
Yes
Latching:
Yes
Trigger:
AL2 alarm threshold exceeded
Indicator:
– Audible signal
– Visual signal
–
AL2
notification on display
Acknowledge-
ment:
– Possible for audible signal when alarm threshold
AL2 is exceeded
– Possible overall after level falls below alarm thresh-
old AL2
Reset:
– By acknowledgement after level falls below alarm
threshold AL2
–
By switching device off
Exception for
oxygen
: alarm AL2 is not latching.
AL3
Type:
End of measuring range
Adjustable:
No
Latching:
Yes
Trigger:
AL3 alarm threshold exceeded
Indicator:
– Audible signal
– Visual signal
–
AL3
notification on display
–
Reading flashes
Acknowledge-
ment:
– Possible after level falls below alarm threshold AL2
Reset:
– By acknowledgement after level falls below alarm
threshold AL2
–
By switching device off