ATI Technologies F12/D - Page 51

ATI Model F12/D Gas Transmitter Part 4 – Operation
50
O&M Manual (Rev-H)
Gas Alarm Operation
Figure 64 illustrates the operation of a high (rising) gas level alarm.
Figure 64. High Alarm Operation
Figure 65 illustrates the operation of a low (falling) gas level alarm (such as for Oxygen deficiency).
Figure 65. Low Alarm Operation
Rdg at set level
Alarm becomes active
Set Level
Res Level
Set Delay
Res_Delay
Rdg at reset level
Alarm becomes inactive
S e c o n d s
C
O
N
C
E
N
T
R
A
T
I
O
N
Rdg at set level
Alarm becomes active
Set Level
Res Level
Set Delay
Res Delay
Rdg at reset level
Alarm becomes inactive
S e c o n d s
C
O
N
C
E
N
T
R
A
T
I
O
N