Yokogawa EJX930A - Manual (Page 60)

<4. Diagnostics>
4-10
IM 01C25R02-01E
B A A A
B B B A
F0406.ai
Diag Supp Count (Number of times: 3)
Diag Supp Count (Number of times: 3)
Diag Period
Diag Period
Upper Threshold
(Ex. Lim fDPmax)
Lower Threshold
(Ex. Lim fDPmin)
An alarm is generated.
An alarm is generated.
Time
Time
Figure 4.4 Relationship of Diag Supp Count and
Alarm
The number of detection to give an alarm is set for
each blockage detection function. The default value
at the shipment is set to three times.
If fluctuating around the threshold value, an alarm
may be often generated. In this case, change the
threshold value (Limit parameter) or the sampling
time ( Diag Period) to enhance the accuracy of the
blockage detection. Refer to subsection 4.2.2.10.