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4WPB100, 4WPB1K PRT Bridge

Terminal Input Modules

Revision: 12/06

C o p y r i g h t © 1 9 9 6 - 2 0 0 6

C a m p b e l l S c i e n t i f i c , I n c .

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Summary of Contents for 4WPB100

Page 1: ...4WPB100 4WPB1K PRT Bridge Terminal Input Modules Revision 12 06 C o p y r i g h t 1 9 9 6 2 0 0 6 C a m p b e l l S c i e n t i f i c I n c H L A G H L A G H L G...

Page 2: ...ieu of all other warranties expressed or implied including warranties of merchantability or fitness for a particular purpose CAMPBELL SCIENTIFIC INC is not liable for special indirect incidental or co...

Page 3: ...4 CR9000X 6 4 5 CR1000 7 5 PRT in 4 Wire Half Bridge 7 5 1 Excitation Voltage 8 5 2 Calibrating a PRT 8 Figures 1 1 Terminal Input Module 1 2 1 Circuit Schematic 2 3 1 Wiring for Example Programs 2 T...

Page 4: ...This is a blank page...

Page 5: ...t shunts The 4WPB100 and 4WPB1K are used to provide completion resistors for 4 wire half bridge measurements of 100 Ohm and 1 killohm Platinum Resistance Thermometer PRT respectively H L A G H L A G H...

Page 6: ...4 wire half bridge measurements the 4WPB is connected to a differential channel and the sense leads from the PRT to the next differential channel The black excitation wire is connected to the excitati...

Page 7: ...ot set to the maximum input range it becomes a four wire half bridge measurement All the examples are for a 100 Ohm PRT in the 4WPB100 The excitation voltages used were chosen with the assumption that...

Page 8: ...put Range CR9000X 250 mV Input Range CR10 X CR1000 CR800 CR850 500 mV Input Range 21X CR7 CR3000 50 1194 1959 2448 4897 100 1385 1716 2145 4291 150 1573 1 1535 1919 3837 200 1758 4 1394 1743 3486 250...

Page 9: ...mV Excitation 7 1 Loc Rs_Ro 8 1 0 Mult 9 0 Offset 02 Temperature RTD P16 1 1 Reps 2 1 R Ro Loc Rs_Ro 3 2 Loc Temp_C 4 1 Mult 5 0 Offset 4 2 21X 1 Full Bridge w mv Excit P9 1 1 Reps 2 3 50 mV Slow Ex...

Page 10: ...Excitation 10 1 Loc Rs_Ro 11 1 0 Mult 12 0 0 Offset 2 Temperature RTD P16 1 1 Reps 2 1 R RO Loc Rs_Ro 3 2 Loc Temp_C 4 1 0 Mult 5 0 0 Offset 4 4 CR9000X CR9000X Datalogger Public Rs_Ro Temp_F DataTab...

Page 11: ...and a separate set of sense wires that allow the voltage across the PRT to be measured without the effect of any voltage drop in the excitation leads Figure 2 1 shows the circuit used to measure the...

Page 12: ...PRT is equal to the current I multiplied by the resistance of the PRT Rs and is greatest when Rs is greatest For example if it is desired to measure a temperature in the range of 10 to 40 C the maxim...

Page 13: ...o perform the calibration connect the PRT to the datalogger and program the datalogger to measure the PRT with the 4 wire half bridge as shown in the example section multiplier 1 Place the PRT in an i...

Page 14: ...4WPB100 4WPB1K PRT Bridge Terminal Input Modules 10 This is a blank page...

Page 15: ...This is a blank page...

Page 16: ...campbellsci com br suporte campbellsci com br Campbell Scientific Canada Corp CSC 11564 149th Street NW Edmonton Alberta T5M 1W7 CANADA www campbellsci ca dataloggers campbellsci ca Campbell Scientif...

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