Peekel Instruments User manual PICAS V2.6.1
Page 45 of 59
3.6.2 CA2CF -menu: SENSOR
This menu specifies the connected sensor like a load-cell or a LVDT. If plain strain gauges
are used, it is easier to use the strain gauge-menu number 3.
DEVICE 1
CHANNEL 1
Controls and Functions
Sensor-Range adjustable (-10,000 . . . >>> . . . +10.000 with
selectable suffix (pico /... / Tera)
Physic.Unit selectable (N, Nm, N/mm
2
, Pa, ppm, psi, t, V,
V/V,%, bar,
o
C / g, g/mm
2
, G, Hz, inch, K,
lbs, m, m/m, m/s or m/s
2
)
Sensor V/V editable (00,000 . . . >>> . . 10.000 with
selectable suffix (pico /... / Tera)
Meas. Sensor <execute>
Auto-Balance <execute>
Functional Description
Sensor-range specifies the physical stimulus (force, displacement) that will generate
sensor v/v at the amplifier-input. In the shown example a load-cell is specified that gives 1
mV/V signal if a force of 10000 Newton is applied. These values can often be read from the
datasheet and represent mostly full-load signals. But the values in the sensor-menu can
also be obtained from in-house calibration and they do not necessarily have to be full-load
signals. If you have measured and know that your 10kN load-cell produces 0.83mV/V if
8.3kN is applied, those values would do the job as well.
The parameter physic.unit specifies the physical unit of the sensor. A load-cell could have
t or N as unit and an lvdt could have m (meter, as in centimeter, millimeter) as unit.
The sensor-calibration can automatically be done with this menu.
First the sensor must be placed in a zero position condition. Now the Auto Balance
command must be give. After this the measured value will be at zero.
AT this time the sensor must be placed in a known position. situation, for example at a
load-cell 8.3kN is applied. Now the meas.sensor command is given. The input signal level
is measured and the sensor sensitivity is calculated and presented on the display at the
line sensor v/v.
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