Input Connectors; Bridge Completion; Shunt Calibration - HBM Genesis GEN5i User Manual

I2679-4.0 en
12.6.2

Input connectors

The LEMO 2B316 connector pin-out is compatible with the Liberty data
acquisition system. The mating male connector is LEMO P/N
FGG2B316CLADxx, where xx is the desired cable collet size, or similar.
12.6.3

Bridge completion

Each bridge amplifier channel contains a pair of fixed 10 kΩ resistors for half-
bridge completion that can be switched in under software control. The user can
install two resistors on the removable bridge completion card for another value
and/or precision half-bridge completion. If so, a soldered jumper must be
removed for correct operation.
Additional pins on the LEMO connector provide a precision 350 Ω resistor plus
an additional user-provided value for quarter-bridge completion. The user-
provided value is located on removable bridge completion card. The completion
sockets are designed for Vishay Micro Measurements S-Type resistors but can
be used with other similar types. A diagram of the card layout on one of the
following page shows the location of each resistor.
12.6.4

Shunt calibration

Each bridge amplifier channel contains 100 KΩ and 20 KΩ, 0.1% fixed precision
resistors that can be switched in under software control. With a Gage Factor of
2.00, this resistor simulates the following values of deflection for various bridge
configurations.
Table 12.4: Deflection for various bridge configurations
BRIDGE 1000 Ω
mV/V 2.4888
μstr full
bridge
1
μstr /
2
bridge
1
μstr /
4
bridge
A convenient plug-in module is provided for installation of one additional user-
supplied shunt resistor on each channel. The diagram below shows the location
of the user completion resistors. A fourth calibration resistor can be connected
externally at the connector pins. Any of the four available shunt cal resistors
can be switched in under software control to provide multi-point calibration and
linearity verification.
100 KΩ
350 Ω 120 Ω
0.873 0.299
1244 437
2488 873
4975 1747
20 KΩ
1000 Ω 350 Ω
12.20 4.337
150 6098 2169
300 12195 4337
600 24390 8674
GEN5i
120 Ω
1.495
748
1496
2991
267