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Mantracourt Electronics Limited

 – ICA User Manual   

 

Chapter 1 The ICA Range 

 

Figure 1.1 Block Diagram 

 

 

 

 
The ICA is a Strain Gauge Amplifier, converting a strain gauge input to a volt or mA output – otherwise known as a 
Signal Conditioner. 
 
The ICA provides a wide range of signal conditioning for Strain Gauges, Load Cells, Pressure and Torque Transducers.  
 
Offered in 5 Very High Stability versions: 

 

ICA1H  

3 wire - 0.1 to 10.1 V 

 

ICA2H  

3 wire - 0.1 to 5.1 V 

 

ICA3H  

4 wire - 

 10V / 

15 V supply 

 

ICA4H  

3 wire - 4 to 20 mA 

 

ICA6H  

3 wire – 

10 V / 15-24 V supply  

 
Industrial Stability versions: 

 

ICA5 S & A   2 wire – 4 to 20mA 

N.B. The ICA5 is designed for a 1000 ohm bridge or higher, however 350 ohms 

can

 be used but with reduced 

performance (see Chapter 2 ‘ICA5S & ICA5A’)Transducer 

SENSITIVITY 

of between 0.5 mV/V and greater than 10 mV/V 

are possible. As supplied they are optimised to 2.5 mV/V. This range covers most, but not all strain gauges. 
 
Sensitivity adjustment (

SPAN

) is achieved by a combination of changing the gain (SPAN) resistor ‘R’  (see chapter 2) 

and associated 

fine adjustment

 by potentiometer. 

 
Similarly transducer 

ZERO

 can be compensated for in the module by means of the ZERO potentiometer. This 

adjustment is to remove the effects of slight errors in the strain gauge.  It is not intended to act as an offset tare due to 
its limited range of adjustment  
 

The ICA6H 

The ICA6H is a two-part module which combines an ICA3H with a DC-DC power module. 
The power module generates both positive and negative supply rails for the ICA3H thereby enabling it to produce its 
normal ±10 V output from a single 15-24 V supply. 
 
The ICA6H also has pads on its underside which can be used to mount and provide connections for a range of 
Transducer Electronic Data Sheet ICs (TEDS). 

Содержание ICA1H

Страница 1: ...ICA User Manual ICA ICA Embedded Strain Gauge Analogue Amplifiers...

Страница 2: ...nt Resistance Formula ICA4 and ICA5 9 Table 2 1 The ICA H S Cable Data 10 Chapter 3 Calculating Offset and Gain Resistor Values 11 Calculating the offset resistor values 11 Calculating the gain resist...

Страница 3: ...5 mV V and greater than 10 mV V are possible As supplied they are optimised to 2 5 mV V This range covers most but not all strain gauges Sensitivity adjustment SPAN is achieved by a combination of ch...

Страница 4: ...ure and protected Figure 2 1 Dimensions The module is designed to fit in the strain gauge pocket Use the 2 1mm hole to secure the unit The mounting hole will accept an M2 screw or American equivalent...

Страница 5: ...r the ICA1H ICA2H The strain gauge cable should be attached to the solder pads as illustrated For most applications 3 wire un shielded field wiring is quite adequate For best EMC performance use the c...

Страница 6: ...e cable should be attached to the solder pads as illustrated For most applications 3 wire un shielded connections for field wiring is quite adequate For best EMC performance use the connections shown...

Страница 7: ...onitor connected to the loop see the Output Shunt Resistance Formula at the end of this chapter Figure 2 7 Connection Details for the ICA4H Source mode Figure 2 8 Connection Details for the ICA4H Sink...

Страница 8: ...7 The ICA4H can be used with three wire cabling in both sink and source mode The only difference between the two modes is whether the common end of the load is connected to the positive of the PSU si...

Страница 9: ...ower signal level requires more gain from the ICA5 to compensate leading to a degradation in performance with regards to temperature stability and noise performance Impedances greater than 1000 ohms a...

Страница 10: ...luding the wiring resistance for low supply voltage operation of the ICA4H and ICA5 Alternatively by transposing the formula the minimum supply voltage for a given shunt resistance can be determined I...

Страница 11: ...K Farnell 585 646 Individually shielded twisted multi pair cable 7 0 25 mm 3 pair Tinned copper drain Individually shielded in polyester tape Diameter 8 1 mm Capacitance m core to core 98 pF core to s...

Страница 12: ...in resistor values The ICA range of strain gauge amplifiers are supplied un calibrated but optimised for a sensitivity of 2 5 mV V To accommodate other sensitivities the gain resistor Rgain shown in t...

Страница 13: ...1 40000 37 2 1 1105 Use preferred value 1k1 Example 3 ICA3H no offset 2 5 mV V required sensitivity at 5 V output Gain constant Required output Maximum output 372 2 5 5 10 74 5 Resistor constant 1 40...

Страница 14: ...s the sensitivity of the load cell in mV V Vexc is the excitation voltage in volts and Z is the load cell impedance in ohms e g For a 2 5 mV V 1000 ohm load cell R2 222 17 k ohms use 220 k nearest E24...

Страница 15: ...l 14 Offset Resistor R1 vs Load Cell Impedance The following table gives the value of R1 for various load cell impedances and 2 FS and 4 FS trim Load Cell Impedance 2 FS 4 FS 350 Ohms 30k n a 700 Ohms...

Страница 16: ...Details for Calibration 1 Apply the known low calibration conditions weight force or mV V This may be zero if required and using the Z potentiometer Zero set the output to the relevant low level depe...

Страница 17: ...ould be high and fixed a Check the sensor is connected typically reading 350 ohm across output with the power off b Check the Excitation voltage is at 5 V dc for the ICA1 4H and 6H see Table 3 6 for I...

Страница 18: ...a If the adjustment cannot reach the maximum output desired then check the tare is not too high b If the potentiometer does not alter the output the unit must be repaired remove from service c It is...

Страница 19: ...overdue accounts and that a strict interpretation of our conditions of trading invalidates warranty claims where late payment has occurred Please refer to the RMA Form Return Material Authorization co...

Страница 20: ...dentified as SPAN It relates to the proportional output to the sensor input Calibration of the ICA is determined by setting the Gain Span and Offset Zero The amount of amplification used in an electri...

Страница 21: ...force exerted on it be it pressure torque or load The ICA is designed to convert this change in the resistance of the Strain Gauge to a proportional electrical signal Strain Gauge Amplifier The ICA is...

Страница 22: ...tal current 22mA Measurement Parameter Minimum Typical Maximum Units Notes Bridge Excitation 4 90 5 5 10 volts Bridge Impedance 350 1000 5000 ohms Bridge Sensitivity 0 5 2 5 50 mV V Note 1 Output load...

Страница 23: ...surement Parameter Minimum Typical Maximum Units Notes Bridge Excitation 4 90 5 5 10 volts Bridge Impedance 350 1000 5000 ohms Bridge Sensitivity 0 5 2 5 50 mV V Note 1 Output load 5000 ohms Bandwidth...

Страница 24: ...ent Parameter Minimum Typical Maximum Units Notes Bridge Excitation 4 90 5 5 10 volts Bridge Impedance 350 1000 5000 ohms Bridge Sensitivity 0 5 2 5 50 mV V Note 1 Output load 5000 ohms Bandwidth DC 1...

Страница 25: ...rement Parameter Minimum Typical Maximum Units Notes Bridge Excitation 4 90 5 5 10 volts Bridge Impedance 350 1000 5000 ohms Bridge Sensitivity 0 5 2 5 150 mV V Note 1 Output load 900 ohms Note 2 Band...

Страница 26: ...stment 8 FR Linearity 0 02 FR Temperature stability Zero Temperature Stability 0 001 0 005 FR C At 2 5 mV V Span Temperature Stability 0 007 0 014 FR C At 2 5 mV V FR Full Range 16 mA Note 1 1000 ohm...

Страница 27: ...1000 Hz Zero adjustment 2 FR Note 4 Span adjustment 8 FR Linearity 0 02 FR Temperature stability Zero Temperature Stability 0 001 0 005 FR C At 2 5 mV V Span Temperature Stability 0 007 0 014 FR C At...

Страница 28: ...ny warm up time Note 2 Not including excitation current e g when connected to a 350 ohm load cell excitation current 5 350 14 mA Total current 22 mA Measurement FR Full Range 10 V Note 1 Set by calibr...

Страница 29: ...nformity with the following relevant Union harmonisation legislation LVD directive 2014 35 EU EMC directive 2014 30 EU RoHS directive 2011 65 EU Based on the following harmonised standards EN 61326 1...

Страница 30: ...Mantracourt Electronics Limited ICA User Manual 29...

Страница 31: ...Mantracourt Electronics Limited ICA User Manual 30...

Страница 32: ...Manual Applies To ICA Product Range Part Number 517 936 Issue Number 01 00 Dated 19th January 2018 In the interests of continued product development Mantracourt Electronics Limited reserves the right...

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