Garnet MULTIRACK 688-S, Manual

Page 8

688 Manual 

fittings

 at each end.  

At the lowest point in the air line 

insert a T fitting with approximately two feet of Synflex 

hanging down to provide a drain for any water than may 

get into the system.  If a T fitting is not feasible, put a 

fitting into the bottom of the display enclosure and route 

the 2 feet of Synflex from there.

8. 

Feed the fiber optic cable through the hose, leaving about 

8 inches extra at each end.  Cut the fiber ends square with a 

sharp knife.  Insert the fiber into the connectors at each end 

and tighten the connector lock nuts.

9. 

Mount the rack socket(s) and wire the rack socket(s) to the 

controller wires.  The controller is wired as though it were a 

probe.  The wiring pattern for the rack socket(s) should be 

verified with the loading rack facility.  The wiring code for the 

controller is as follows:

COLOR  FUNCTION

PROBE EQUIVALENT

Red

Optic power

Optic probe red wire

Yellow

Optic pulse input

Optic probe yellow wire

Orange Optic pulse output

Optic probe orange wire

Black

Optic & thermistor ground

Optic probe black wire

Thermistor probe white wire

Green

Thermistor lead #1

Thermistor probe black wire

Green

Thermistor lead #2

Thermistor probe black wire

10.  For dual trailer applications, wire the optic portion of the 

two controllers in series as though they were probes (reds 

and blacks together in parallel, yellow and orange in series).  

Wire the thermistor portion with a black probe lead from the 

rack socket to a green lead on a controller.  The white probe 

ground leads from the socket connect to the controller black 

ground leads.  The green temperature compensation probe 

leads from the socket are not connected.

11.  Refer to the proper gauge manual and program alarm point 4 

as SHUT DOWN at the desired overfill point.

12.  Connect a sensor tester to each of the rack sockets and verify 

proper rack shutdown by lifting the floats, or simulating float 

movement with a programmer.