Some sensors have additional sensor lines.
When the measuring amplifier has only 4 connections for the sensor, you can
The parallel circuit of sensor supply and sensor line is better, because
The shield is to be placed on the amplifier.
When measuring amplifiers with SUB-D15 input jack: to PIN 1.
For amplifiers with SUB-D15HD input jack: on the connector housing
all other measuring amplifier: GND
alternatively when GND eg not available in the connector: on -Us (negative sensor power supply)
Caution: For sensors with connectors of the screen is above the connector housing on the sensor housing.
In this case, it often makes more sense, the screen is not in addition to the measuring amplifier hang up, otherwise there may be transient currents flow over the shield.
It is then better to ground the sensor housing ,
For more information, refer to this document: kb shield_en.pdf
Note: The bulk of the supply voltage and the ground for the processing analog-digital conversion should be merged at the measuring amplifier.
For more information, refer to this document: kb shield.pdf
Over the entire range of force sensors or torque sensors, a signal ratio is achieved to noise between 1000/1 to 10000/1 (at a bandwidth of 250Hz) with analog amplifiers usually.
We consider the entire measuring chain consisting of sensor and amplifier:
Respectively the slopes of the curves are given for the sensor and the amplifier.
the sensor for example 2,000 mV / V per 100.0 N
at the measuring amplifier for example 10.00 V per 2,000 mV / V
Sensor and amplifier are connected in series, the characteristic values are therefore multiplied together:
NOTE: The slope of the sensor characteristic is referred to as "characteristic". The characteristic value is always given as output at (pro) nominal power
the slope of the amplifier characteristic is referred to as "input sensitivity". 100% of the output signal is obtained at the input sensitivity.
The zero signal of the sensor (output at 0 power) and the zero signal of the amplifier (Ausgangsgssignal at 0 input voltage) are not included in the calculation. With the zeroing function, this constant error is matched.
When current output 4-20mA, the zero point is shifted to 4mA.
The maximum change of the output signal (the output signal swing) is 16mA.
The output increases by 16mA if the input sensitivity is modulated at 100%.
Sensor: 2,000mV / V 100N per
amplifier: 16mA per 2,000mV / V
Hindweis: Even when measuring amplifiers with shifted zero, for example, 5V ± 5V input sensitivity for the output signal is stroke indicated.