Fluid Components International FLT Series - Manual (Page 39)

CHAPTER 3 - OPERATION FLUID COMPONENTS INTL
Doc. No. 06EN003246 Rev. B 3 - 21 FLTÔ Series FlexSwitchÔ
Low Level Alarm Settings (Sensing Element Normally Wet)
For the low level fail safe setup the following jumpers are to be installed: J18, J20, J23, J24, J27.
Figure 3-7. Low Level Fail Safe Alarm
The following information is assumed:
Relay is de-energized in the ALARM condition.
Alarm 1 set point is adjusted for the mean value between the air and liquid signals.
Alarm 2 set point is adjusted to approximately half of the liquid signal. (A lower setting might be needed if the
liquid is moving.)
High Level Alarm Settings (Sensing Element Normally Dry)
For the high level fail safe setup the following jumpers are to be installed: J18, J20, J23, J25, J26.
Figure 3-8. High Flow Fail Safe Alarm
The following information is assumed:
Relay is de-energized in the ALARM condition.
Alarm 1 set point is adjusted for the mean value between the air and liquid signals.
Alarm 2 set point is adjusted above maximum signal output for air (not to exceed 7.0 volts).
0.5
1.0
0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
W H E N A L A R M 1 D E T E C T S L O W
L E V E L , T H E R E I S A P O S S I B L E
O P E N A C T I V E R T D O R
S H O R T E D R E F E R E N C E R T D
A L A R M 2 D E T E C T S A
P O S S I B L E H E A T E R F A I L U R E ,
S H O R T E D A C T I V E R T D O R
O P E N R E F E R E N C E R T D
SIGNAL
O U T P U T
MEDIA
S E T P O I N T
A L A R M 2
D E - E N E R G I Z E D
D E - E N E R G I Z E D
E N E R G I Z E D
E N E R G I Z E D
C00534-2
A L A R M 1
S E T P O I N T
A I R
L I Q U I D
A P O W E R F A I L U R E I S D E T E C T E D I F
B O T H R E L A Y S A R E D E - E N E R G I Z E D
0 . 5
1 . 0
0
1 . 5
2 . 0
2 . 5
3 . 0
3 . 5
4 . 0
4 . 5
5 . 0
A L A R M 2 D E T E C T S A P O S S I B L E
O P E N A C T I V E R T D O R S H O R T E D
R E F E R E N C E R T D
W H E N A L A R M 1 D E T E C T S H I G H
L E V E L , T H E R E I S A P O S S I B L E
H E A T E R F A I L U R E ,
S H O R T E D A C T I V E R T D O R
O P E N R E F E R E N C E R T D
SIGNAL
OUTPUT
MEDIA
S E T P O I N T
S E T P O I N T
D E - E N E R G I Z E D
D E - E N E R G I Z E D
E N E R G I Z E D
E N E R G I Z E D
C 0 0 5 3 5 - 2
A I R
L I Q U I D
A L A R M 1
A L A R M 2
A P O W E R F A I L U R E I S D E T E C T E D I F
B O T H R E L A Y S A R E D E - E N E R G I Z E D