Related Manuals for Campbell 4WPB100
Summary of Contents for Campbell 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 ,...
- Page 2 Warranty and Assistance The 4WPB100, 4WPB1K PRT BRIDGE TERMINAL INPUT MOUDLES are warranted by CAMPBELL SCIENTIFIC, INC. to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless specified otherwise. Batteries have no warranty.
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Page 3: Table Of Contents
3-1. Wiring for Example Programs ..............2 Tables 3-1. 4WPB100/4WPB1K Connections to Campbell Scientific Dataloggers..3 4-1. Excitation Voltage for 100 Ohm PRT in 4WPB100 Based on Maximum Temperature and Input Voltage Range.......3 4-2. Excitation Voltage for 1000 Ohm PRT in 4WPB1000 Based on... - Page 4 This is a blank page.
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Page 5: Function
Terminal input modules connect directly to the datalogger's input terminals to provide completion resistors for resistive bridge measurements, voltage dividers, and precision current 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. -
Page 6: Wiring
4WPB100, 4WPB1K PRT Bridge Terminal Input Modules Rf = 100 , 1k 0.01% FIGURE 2-1. Circuit Schematic 3. Wiring The Terminal input module is connected to the appropriate channel. The dashed lines in Figure 2-1 indicate the sensor wiring. When making 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. -
Page 7: Programming Examples
When Instruction 9 is used with the first measurement range not 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 the temperature would not exceed 50 °C. -
Page 8: Excitation Voltage For 1000 Ohm Prt In 4Wpb1000 Based On
4WPB100, 4WPB1K PRT Bridge Terminal Input Modules 329.51 1507 345.13 1441 360.47 1382 375.51 1328 390.26 1280 TABLE 4-2. Excitation Voltage for 1000 Ohm PRT in 4WPB1000 Based on Maximum Temperature and Input Voltage Range Excitation Voltage, mV ±250 mV Input Max. -
Page 9: Cr10(X)
4WPB100, 4WPB1K PRT Bridge Terminal Input Modules 4.1 CR10(X) 01: Full Bridge w/mv Excit (P9) 1: 1 Reps ±25 mV 60 Hz Rejection Ex Range 2: 23 ±25 mV 60 Hz Rejection Br Range 3: 23 4: 1 DIFF Channel... -
Page 10: Cr7
4WPB100, 4WPB1K PRT Bridge Terminal Input Modules 4.3 CR7 1: Full Bridge w/mv Excit (P9) 1: 1 Reps 2: 3 ± 15 mV Slow Range 3: 3 ± 15 mV Slow Range 4: 1 In Card 5: 1 DIFF Channel... -
Page 11: Prt In 4 Wire Half Bridge
4WPB100, 4WPB1K PRT Bridge Terminal Input Modules 4.5 CR1000 'CR1000 Series Datalogger Public Rs_R0, Temp_C DataTable (Hourly,True,-1) DataInterval (0,60,Min,0) Average (1,Temp_C,IEEE4,0) EndTable BeginProg Scan (1,Sec,0,0) BrHalf4W (Rs_R0,1,mV25,mV25,1,Vx1,1,2035,True ,True ,0,250,1.0,0) PRT (Temp_C,1,Rs_R0,1.0,0) CallTable Hourly NextScan EndProg 5. PRT in 4 Wire Half Bridge... -
Page 12: Excitation Voltage
4WPB100, 4WPB1K PRT Bridge Terminal Input Modules The RTD Instruction (16) computes the temperature (°C) for a DIN 43760 standard PRT from the ratio of the PRT resistance at the temperature being measured (R ) to its resistance at 0°C (R ). - Page 13 4WPB100, 4WPB1K PRT Bridge Terminal Input Modules With the PRT at 0 °C, R . Thus, the above result becomes R , the reciprocal of the multiplier required to calculate temperature, R . By making a measurement with the PRT in an ice bath, errors in both R and R can be accounted for.
- Page 14 4WPB100, 4WPB1K PRT Bridge Terminal Input Modules This is a blank page.
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- Page 16 Campbell Scientific Companies Campbell Scientific, Inc. (CSI) 815 West 1800 North Logan, Utah 84321 UNITED STATES www.campbellsci.com info@campbellsci.com Campbell Scientific Africa Pty. Ltd. (CSAf) PO Box 2450 Somerset West 7129 SOUTH AFRICA www.csafrica.co.za cleroux@csafrica.co.za Campbell Scientific Australia Pty. Ltd. (CSA)