Mts Model FlexTest SE Manual do Utilizador descarregar pdf (Página 93)

Model 493.21B (DUC B) Jumpers

Models FlexTest® IIm/GT/SE Controller Hardware FlexTest GT Controller Connections

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 kΩ resistor to the input of the conditioner preamp).

123

–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

Disable

Enabl

Disable

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Mts Model FlexTest SE Manual do Utilizador Página 93