Vega FiberFlex LFXG-H, Operating Instructions Manual

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Diagnostics and repair
LFXG-H Installation and Operation Guide 85
Jumpers
Jumpers JP1 and JP2 on the power supply board set the current loop
source or sink mode.
The level gauge does not use jumpers J1 – J4 on the CPU board.
Table 5.5
CPU test point labels
Label Description
Count Raw input signal coming from the preamplifier.
GND Logic ground
U5 pin 8 +5 V power supply test points. Referenced to logic ground.
Note: Do not change the jumpers from the current setting without
calling VEGA Field Service.
Table 5.6 Jumper settings
Mode Gauge current loop Jumper setting
Source mode Self-powered JP1 1-2, JP2 2-3
Sink mode DCS-powered JP1 2-3, JP2 1-2