Figure 2. High/Low Level Failsafe
(See Fig. 3 and 4)
SW1
Position 1
SW1
Position 2
Sensitivity
Off
Off
1 pF, High
Off
On
2 pF
On
Off
5 pF, Medium
On
On
10 pf, Low
SW1
Position 3
SW1
Position 4
Time
Delay
Off
Off
1 second
Off
On
4 seconds
On
Off
8 seconds
On
On
15 seconds
Figure 3. Sensitivity Settings
Figure 4. Time Delay Settings
(See Fig. 2)
Figure 1. VRF-1000 Electronics
Failsafe Selection
High Level Failsafe Operation
· DIP Switch SW1 position 5 is on.
· If the electrical power fails, the relay turns off. This indicates material
as if the tank were full.
Low Level Failsafe Operation
· DIP Switch SW1 position 5 is off.
· If the electrical power fails, the relay turns off. This indicates material
as if the tank were empty.
The output relay contacts are labeled in the un-powered alarm state. The relay is energized
when the VRF-1000 is not alarmed. This status may be opposite that of other Bindicator
®
brand units. If the VRF-1000 is replacing an older Model RF-8000 or RF-9000 unit,
connections will need to be opposite. If a connection was made to NC1 terminal of the
RF8/9000, connect now to the NO1 terminal of the VRF-1000. C1 and C2 connections
would remain the same.
