NORMAL OPERATION
Part. No. 2400M2501_6 Touchpoint Pro
121 Technical Handbook
14.7.1 Event Status with a Rising Gas Reading
Event Status
(Full scale/Over
Range)
Event History
(Sequential Entries)
Full Scale Exceeded
Active
Full Scale Exceeded Active
Over Range Warning
Active
Full Scale Exceeded Active
Full Scale Exceeded Cleared
Over Range Active
Full Scale Exceeded auto-
cleared (overwritten by Over
Range Warning)
Table 41. Rising Gas Reading
14.7.2 Event Status as the Gas Concentration Decreases
The indicated value remains at the programmed Over Range Warning value. A "greater than" symbol (">") is displayed to
indicate that the programmed level has been exceeded. The latched reading may be reset once the gas concentration has
decreased below the programmed level.
The Over Range Warning remains Latched.
Note: In the following example, Full Scale Exceeded will not reappear until the gas concentration falls to between 100% &
120% of the pre-set gas range and the latched Over Range Warning has been reset manually.
Falling Gas Concentration
Event Status (Full
Scale/Over Range)
Event History
(Sequential Entries)
Over Range Warning
still Active (latched)
Full Scale Exceeded Active
Full Scale Exceeded Cleared
Over Range Active
Full Scale Exceeded is hidden
while Over Range Warning is
active.
Full Scale Exceeded Active
Full Scale Exceeded Cleared
Over Range Active
Over Range Cleared
Full Scale Exceeded Active
1
st
manual reset attempted by
user.
Over Range Warning reset
was successfully.
Full Scale Exceeded may
appear.
Full Scale Exceeded Active
Full Scale Exceeded Cleared
Over Range Active
Over Range Cleared
Full Scale Exceeded Active
Full Scale Exceeded cleared
The 2
nd
manual reset can be
applied now and Full Scale
Exceeded should auto-clear.
Table 42. Falling Gas Reading
A potentially explosive gas concentration may still exist at this point.
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