FLT
®
Series FlexSwitch
TM
OPERATION
Fluid Components International LLC 35
Low Level Alarm Settings (Sensing Element Normally Wet)
Install the following jumpers for the low level fail-safe setup: J18, J20, J23, J24, J27.
The following information is assumed:
Relay is de-energized in the ALARM condition.
Alarm 1 setpoint is adjusted for the mean value between the air and liquid signals.
Alarm 2 setpoint 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)
Install the following jumpers for the high level fail-safe setup: J18, J20, J23, J25, J26.
The following information is assumed:
Relay is de-energized in the ALARM condition.
Alarm 1 setpoint is adjusted for the mean value between the air and liquid signals.
Alarm 2 setpoint is adjusted above maximum signal output for air (not to exceed 7.0 volts).
Figure 3-7. Low Level Fail-Safe Alarm
Figure 3-8. High Level Fail-Safe Alarm
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