MTS Model FlexTest SE - Manual (Page 93)

Model 493.21B (DUC B) Jumpers
Models FlexTest® IIm/GT/SE Controller Hardware FlexTest GT Controller Connections 93
4- or 8-wire
sensor cable
Jumpers W2 and W3 establish the correct shunt calibration connections for 4-
wire and 8-wire sensor cables. The length of the sensor cable determines which
type of cable is used. Short cables are typically 4-wire cables while long cables
are typically 8-wire cables.
• Jumper W2 selects a 4- or 8-wire transducer for positive feedback.
• Jumper W3 selects a 4- or 8-wire transducer for negative feedback.
• The setting of jumper W8 (single ended excitation enable) may affect your
choices for these jumpers (W2 and W3).
Note +/– excitation (–excitation is standard).
Bridge balance
Jumper W4 changes the offset of the bridge balance circuit. If the zero offset is
too large when the sensor bridge is balanced, you should enable this feature (it
adds a 100 k
Ω resistor to the input of the conditioner preamp).
W2
W3
W2
W3
W2
W3
W2
W3
1 2 3
–EX to –FB shunt
in 4-wire config
-EX to +FB shunt in
4-wire config
–EX to –FBR shunt
in 8-wire config -EX to +FBR shunt
in 8-wire config
Default
Default
W4 W4
Disable Enabl Disable