Futek CSG110 Installation guide

CSG110 BASIC INSTRUCTIONS
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current.
With the load applied and the
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the pots.
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labeled ‘RSH’.
shunt.
(pictured).
described in the table below:
VDC To select
0.5 to 4.0 mV/V. Select the
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on the left.
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Pin
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2
3
4 i
5
7
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DEFAULT SETTINGS:
Input Range: 0 to +/-2mV/V
Excitation Voltage: 10 VDC
Output Range: +/-10 VDC, 4-20 mA
CONNECTIONS:
STANDARD SPAN & ZERO ADJUSTMENT:
Once all connections are complete you can begin to setup the
sensor/amplifier system. You will need to have the output from the
CSG110 connected to a device so you can readout the voltage or
Apply a known load to the sensor.
sensor settled, use a screwdriver to adjust the output (i.e. 20mA, 10
If you are apply ng the full load to the sensor then you would
want to adjust the CSG110 output to 10VDC or 20mA. If you are
apply ng half of the full load then you would want to adjust the CSG110
output to exactly half of the maximum. Once your span is set, check
the zero. With no load applied to the sensor, adjust the zero.
Adjusting the zero and span is done by using a screw driver to adjust
SHUNT READINGS:
Shunt resistors simulate a load on the cell thus allow ng for calibration.
To simulate a load first determine the value of the resistor needed
www.futek.com/shuntcalc.asp) Connect the shunt resistor in the spot
When you would like to simulate the load to adjust the
span it is necessary to press the pushbutton that corresponds to the
While the shunt is enabled and the CSG110 is reading in the
simulated load adjust the span (described above) to the correct output
OUTPUT SELECTION:
To change the current output, solder the jumpers in the fashion
SELECTION OF INPUT RANGE & EXCITATION VOLTAGE:
There are two excitation values
available on the CSG110, 10
(default) and 5 VDC.
your excitation, simply connect
the corresponding jumper.
The input value range is from
Input value closest to your input
range by soldering the
corresponding jumper.
For example: if you are using a 2mV/V sensor with the 5 VDC
excitation, then you would want to solder the 1.0 (10mV
you are using a 2mV/V sensor with 10 VDC excitation then you wou
want to solder the 2.0 (20mV jumper
POLARITY REVERSAL:
The default polarity is
shown in the picture
To switch
the polarity, simply move
the jumpers to the
positions shown in the
picture on the right.
For example If you are using your CSG110 with a tension and
compression load cell and you have tension setup as the positive
d like to now have compression as the positive
direction all you have to do is move the jumpers from the ‘Default’
polarity position to the ‘Reverse Polarity’ position.
Wiring Code
+ Excitat on/ + Sense
+ Signal
- Signal
- Exc tation
Shield
-Sense
Wiring Code
RED +12 to 24 VDC Power
GRN Vo tage)
7 (ORG Return (Voltage)
6 (BLK Return (Power
Sh
2 (BLU Return Current
1 (WHT gnal Current)
mA Output SJ1 SJ2 SJ3
4-20mA (DEFAULT CLOSED OPEN OPEN
0-20mA OPEN CLOSED CLOSED
5-25m CLOSED OPEN CLOSED
FUTEK ADVANCED SENSOR TECHNOLOGY, INC. * 10 Thomas * Irvine, CA 92618 * Tel: [phone] * Fax: [phone] * www.futek.com
FUTEK ADVANCED SENSOR TECHNOLOGY, INC. * 10 Thomas * Irvine, CA 92618 * Tel: [phone] * Fax: [phone] * www.futek.com

ADVANCED SPAN AND ZERO ADJUSTMENTS: The instructions for calculating the resistance value (to shift the
zero) are below:
In this example is 2.5 V corresponds to the Low CSG110 output.
5) Now we must offset the zero. First we need to calculate the GAIN,
the equation to do this is below.
Gain = (CSG110 Span x 1000) / (Rated Output x Excitation)
Where:
The CSG110 Span is calculated in Step 3
Often when using a signal conditioner it is necessary to offset the The Rated Output is determined in Step 1
standard 0-10 VDC (or mA values) span. The CSG110 makes this The Excitation is determined in Step 4
simple. The user just needs to determine the correct excitation voltage
and input range to create their desired span and then connect a Example: Gain = (2.5 x 1000) / (2 x 5) = 250
resistor in the ISI location shown on the board to off set their zero. 6) Now that we know our Gain we can calculate how many mV are
CALCULATING THE CORRECT INPUT JUMPER, EXCITATION required to shift the zero the desired amount. The equation for
SETTING & RESISTOR VALUE this is below
Determining Input value and Excitation settings: Zero Offset = Zero Shift / Gain
1) It is first necessary to find out your sensor ‘Rated Output’ in mV/V Where:
(listed on sensor certificate). Zero Shift is the amount of volts that the zero output from the CSG110
needs to be shifted
Example: 2mV/V Gain is calculated in (Step 5)
2) Determine your desired output from the CSG110. 0-10 VDC is Example:
the standard output. 2.5 / 250 = 0.010 V or 10mV = Zero Offset
Example: I would like the 0-2mV/V sensor range to correspond to 2.5 VDC – 5 7) Now that all of the necessary values are calculated you can use
VDC output from the CSG110. the equation below to calculate the resistance necessary to shift
3) Determine your desired CSG110 output span. This would be your the zero.
Maximum CSG110 Output minus your Minimum CSG110
Output. Rz = Resistance Needed
Zo = Zero Offset in Volts (Step 6)
Example: In this example, our maximum CSG110 output would be 5 VDC E = Excitation (Step 4)
(Corresponding to 2mV/V) and our Minimum CSG110 output would be 2.5 VDC
(Corresponding to 0 mV/V). Thus the total Span would equal 5 – 2.5 = 2.5 VDC Br = Bridge Resistance of your sensor
4) Now that you know what you would like your output to be (Step 2) Rz = -Br (⎟Zo⎟- 0.5E) / (2Zo)
and you know the span range (Step 3) you must vary the Input
Jumpers and Excitation Jumpers to create this range. The Example:
formula for this is: Rz = -350 (
⎟ 0.01 ⎟ - 0.5(5)) / (2*0.01) = 43575
Thus, a resistor of 43.575K ohms is necessary to offset the zero.
CSG110 Output Span = (Rated Output x Excitation) / Input
Range 8) Now that the input range and excitation have been determined
and the resistance necessary for a zero shift of 2.5V is known, all
The two known values are the: you need to do is complete the setup.
CSG110 Output Span, which refers to your desired span (Step 3) First make sure that you have soldered together the correct input
Rated Output which refers to the output of the sensor (Step 1) range jumper (4.0) and excitation jumper (5.0). Next take your
43.5K ohm resister and solder it in to the ISI location on the
The two variables are the: CSG110 board (Shown below).
Excitation, this can either be 5 VDC or 10 VDC (See ‘SELECTION
OF EXCITATION VALUE’) ADJUSTING THE SPAN
Input Range, this can either be 0.5, 1.0, 1.5, 2.0, 3.0, or 4.0 (See The input jumpers vary from 0.5, 1.0, 1.5, 2.0, 3.0, and 4.0. This
‘INPUT VALUE ADJUSTMENT’) 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
Vary the Excitation and Input Range until you get a CSG110 or 3.0mV/V. The CSG110 does have a -20 to 4.5 % of R.O. adjustment
Output Span that is equal to (or vary close to) you span range so a sensor with an output close to that of the input ranges will
(calculated in Step 3). Sometimes it is helpful to make a chart to work fine. However, when the Rated Output of the sensor falls between
keep track of the span values.
Excitation
Input Value 10 5
0.5 40.0 20.0
1 20.0
13.3 10.0 6.7
1.5
2 10.0 5.0
3 6.7 3.3
4 5.0 2.5
two of the input ranges it is necessary to use a resistor to adjust the
output of the sensor.
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). Use the equation below
to calculate the value of the resistor needed.
Rs = Span Resistance Needed Br = Bridge Resistance
Do = Desired output Ao = Actual Output
Rs = (Ao/Do – 1)*Br
Example:
Rated Output (Step 1) = 2mV/V,
Span = 2.5 VDC (Step 3) Example:
Excitation can be 5 or 10 VDC
Input Range can be 0.5, 1.0, 1.5, 2.0, 3.0, 4.0 mV, Br = 350 ohm Do = 2.0 mV/V Ao = 2.5 mV/V
*The formula above was used to fill in the table to the right. Rs = (2.5/2.0-1)*350 = 87.5 ohms.
As you can see in the table, using a 5 VDC excitation and the 4.0 mV jumper will
give you an output span of 2.5. Thus, set your jumpers accordingly. You can also visit our span calculator at www.futek.com/spancalc.aspx
*Any of the spans that come out to be more than 10VDC (Span limit of the to find the span resistance value.
CSG110) will not work. Therefore they are crossed off in the table.
FUTEK ADVANCED SENSOR TECHNOLOGY, INC. * 10 Thomas * Irvine, CA 92618 * Tel: [phone] * Fax: [phone] * www.futek.com
FUTEK ADVANCED SENSOR TECHNOLOGY, INC. * 10 Thomas * Irvine, CA 92618 * Tel: [phone] * Fax: [phone] * www.futek.com

FUTEK ADVANCED SENSOR TECHNOLOGY, INC. * 10 Thomas * Irvine, CA 92618 * Tel: [phone] * Fax: [phone] * www.futek.com
FUTEK ADVANCED SENSOR TECHNOLOGY, INC. * 10 Thomas * Irvine, CA 92618 * Tel: [phone] * Fax: [phone] * www.futek.com