In some applications it is necessary to offset the zero of the CSG110. This is necessary when you want
your zero from your sensor to correspond to a specific output voltage (not zero).
The equation below is for calculating the resistance necessary to shift the zero.
Rz = -Br(abs(Zo) - 0.5E)/(2*Zo)
WHERE:
Rz = Resistance Needed
Zo = Zero Offset (in Volts) HELP...
E = Excitation (in Volts) HELP...
Br = Bridge Resistance of your sensor HELP...
EXAMPLE CALCULATION
Once you have calculated the resistance necessary to shift your zero simply solder that resistor in the
location indicated on the picture below.
NOTE: When you are using a current output convert the mA to volts before beginning the
calculation (4-20mA range = 0-10 VDC range).
The input jumpers vary from 0.5, 1.0, 1.5, 2.0, 3.0, and 4.0. This allows for a large variety of input ranges.
However, it sometimes happens that the Rated Output from the sensor is not exactly 2.0mV/V or 3.0mV/V. The CSG110 does have a 1VDC adjustment range so a
sensor with an output close to that of the input ranges will work fine. However, when the Rated Output of the sensor falls between two of the input ranges it is
necessary to use a resistor to adjust the output of the sensor (Input to the CSG110).
To adjust the output of the sensor when using the CSG110 all you have to do is disconnect the ETR (Excitation
Thru) jumper and connect a resistor to the RSPSET location (pictured below). Use the equation below to calculate the value of
the resistor needed.
Rs = (Ao/Do-1)*Br
WHERE:
Ro = Span Resistance Needed
Br = Bridge Resistance of Sensor HELP...
Do = Desired Output (in mV/V) HELP...
Ao = Actual Output (in mV/V) HELP...
EXAMPLE CALCULATION
The CSG110 is designed for a standard output of 0-10VDC. However sometime it is necessary to change this
output span. Common output ranges are 0-5VDC and 0-2.5VDC. In order to adjust the output voltage range it is necessary to change the input jumpers and
excitation voltage settings on the CSG110
Output Span=((Rated Output (mV/V)*E)/(Input Range (mV/V))
Thus, by varying the Excitation setting and the Input Range setting you can obtain your desired output.
EXAMPLE CALCULATIONS
The picture below shows the location for the Shunt Resistor, Zero Shift Resistor, and the Input Span Resistor.
Please note: when adjusting the Input Span and connecting a
resistor in the 'RSPEST' location below it is also necessary to ETR (Excitation
Thru) jumper (also shown).