6 – Installation and set-up
OxyDetect Oxygen Deficiency Gas Detector
46
05311001B / Revision 4
3.
Select the correct option: "Yes" or "No".
Figure 33 - The alarm follow options screen
6.5.2 Latching/non-latching alarms
You can configure the measurement alarms to be either latching or not latching:
Select
Set up.
Alarm setting
Meaning
Latching
Once the alarm condition has been activated, the alarm condition
remains activated (even if subsequent sample measurements
would not trigger the alarm) until the alarm is manually unlatched
using the instrument user interface.
Not latching
Once the alarm condition has been activated, the alarm condition
remains activated only until a subsequent sample measurement
which would not trigger the alarm is made. The alarm condition is
then deactivated.
When necessary, use the following procedure to unlatch any 'latched' measurement
alarm(s):
1.
On the measurement screen, press the
soft key; the alarm option screen
(Figure 34) will then be displayed.
2.
With the 'Unlatch' option highlighted, press the
soft key. All latched
alarms will then be unlatched and the measurement screen will be displayed
again
6.5.3 Hysteresis levels
The hysteresis level associated with a measurement alarm determines when an alarm
condition (once activated) is deactivated, and this depends on the alarm mode, as
follows:
Select
Set up.
