CB-4TB Connection Box EMC with output trim - ERDE-Elektronik AB - #1

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PORTADA VMI MANN.tif table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:7.00pt "Arial", sans-serif; } .font1 { font:9.00pt "Arial", sans-serif; } .font2 { font:10.00pt "Arial", sans-serif; } .font3 { font:13.00pt "Arial", sans-serif; } .font4 { font:18.00pt "Arial", sans-serif; } .font5 { font:22.00pt "Arial", sans-serif; } .font6 { font:34.00pt "Arial", sans-serif; } .font7 { font:86.00pt "Arial", sans-serif; } o ERDE-Elektronik AB Vellinge Sweden ERDE CB-4TB Connection box Connection box for 4 loadcells Screw terminal connection ofwires 6-wire connection to the box 4-wire cennection to the loadcells Individual loadcell trimming 1 10 ohm potentiometer/loadcell 2 fixed trim resistors/loadcell Solder towers for trim resistors Fitted with jumpers on delivery Shielded aluminium box IP65 Fitted with EMC-glands 1 Pg 16/Pr 22.5 &4Pg 9/Pr 15.2 Max cable diam. 1x14 mm/4x8 mm Dimensions: W=175mm H =80mm D=57 mm CB-4TB is an connection box for summing of the signal from 2-4 bridge coupled loadcells. The connection box can be used for individual fine trimming of the loadcell output. With fixed resistors and trimpotentiometers the excitation can be lowered for the loadcells with highest output until ail loadcells have the same output. CB-4TB is shielded aluminium box fitted with EMC glands for ail cables. Ail connections are made on screw terminais. Connection of fixed température stable resistors are made on solder towers. The position of screw terminais, potentiometers and fixed resistors are printed on the circuit board. For best long time stability the fixed resistors are prefered. CB-4TB is for example used for corner adjustment of scales. Then a load is placed on each loadcell, one at time, and the summed output signal is read. Then the excitation is lowered on the loadcell/loadcells with highest output by calculating a sériai resistor (U=I*R) value. As sériai rersistor the built in trim potentiometers can be used but fixed température stable resistors that are soldered in place is prefered. If trim potentiometers are used the parallell jumper must be eut. After adjusting the testing is made again with the same load. This opérations are repeated until the scale has the same output independing of where the load is placed. Small adjustments should be made each time, since it is difficult to load only one loadcell at time. The other normally gets a small load. © ERDE-Elektronik AB | 2008 \CB4\CB-4TBDEN.cdr/904007/080909