Thermo Scientific Micro-Tech 9101 Reference Manual page 167

Thermo Fisher Scientific
"Channel 2," bottom connector has jumpers J19 and J20 that allow
selection of either external excitation sense (6-wire LC hook-up) or
internal excitation sense (4-wire LC hook-up).
One of four different interrupt channels can be selected from J1 jumper.
J1 is board interrupt 1-2 this is a factory installed jumper, do not move.
Load-Cell Sense Jumper Defaults
Four-Wire Load-Cell
Jumper (internal sense)
J14
J15
J19
J20
Factory option jumpers W2 and W3 allow the A/D converters to operate
at either 10 conversions per second or at 80 conversions per second,
which may be useful for "loss-in-weight" applications. The standard
board is hard-wired for 10 conversions per second. Altering the W2/W3
option jumpers allows software selection of the desired conversion rate,
so do not change.
Jumper Locations
Six-Wire Load-Cell
(external sense)
1-2
1-2
1-2
1-2
Micro-Tech 9101/9201 Reference Manual, Rev J
2-3
2-3
2-3
2-3
A-45