Peekel Instruments User manual PICAS V2.6.1
Page 46 of 59
3.6.3 CA2CF -menu: STRAIN
This menu is specifically intended for using with experimental strain gauge-measurements.
If you measure a complete sensor, like a load-cell or an LVDT, it is easier to use the
sensor-menu number 2
DEVICE 1
CHANNEL 1
Controls and Functions
K-Factor adjustable
Bridge-Fact. adjustable
Use E-Modul selectable (No / Yes)
E-Modulus adjustable ( - 1.0000.....+ 10 000 )
and selectable (pico…>>>… Tera)
E-Mod unit fixed (N/mm
2
)
Functional Description
The k-factor can be copied from the datasheet of the manufacturer of the strain gauges.
The bridge-factor is basically equal to the number of active strain gauges in the bridge. If
applicable it can also be used for the correction of Poisson effects in strain gauges
configurations.
When using half- and quarter ridge configurations be sure to connect the internal bridge-
completion resistors through the bridge-connector. These built-in bridge-completion
resistors are: 120 Ω for 1/4 bridge-completion and 2 x 240 Ω for 1/2 bridge-completion (see
page 5).
The above parameters allow calculation of the signal into the strain unit m/m. If further
calculations are to be done to obtain the stress in the material, the e-modulus parameters
may be set. Set the use e-modul line to yes and set the e-modulus-unit and -value as
appropriate for the material to be tested.
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