Campbell CURS100 Instruction Manual - Table of Contents

Manual is about: CURS100 100 Ohm Current Shunt Terminal Input Module

Summary of CURS100

  • Page 1

    Curs100 100 ohm current shunt terminal input module revision: 2/13 c o p y r i g h t © 1 9 9 6 - 2 0 1 3 c a m p b e l l s c i e n t i f i c , i n c ..

  • Page 3: Warranty

    Warranty “products manufactured by campbell scientific, inc. Are warranted by campbell scientific, inc. (“campbell”) to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless otherwise specified in the corresponding campbell...

  • Page 4: Assistance

    Assistance products may not be returned without prior authorization. The following contact information is for us and international customers residing in countries served by campbell scientific, inc. Directly. Affiliate companies handle repairs for customers within their territories. Please visit www...

  • Page 5: Table of Contents

    Table of contents pdf viewers: these page numbers refer to the printed version of this document. Use the pdf reader bookmarks tab for links to specific sections. 1. Introduction.................................................................1 2. Specifications .........................................

  • Page 7: Terminal Input Module

    Curs100 100 ohm current shunt terminal input module 1. Introduction 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 curs100 converts a current signal (fo...

  • Page 8: 3.  Measurement Concepts

    Curs100 100 ohm current shunt terminal input module datalogger rshunt 100 Ω ± 0.01% h l or g or ag h l curs100 figure 2-1. Curs100 schematic the curs100 has three pins: high, low, and ground; these pins are the correct spacing to insert directly into the datalogger's high, low, and ground terminals ...

  • Page 9

    Curs100 100 ohm current shunt terminal input module 3.1 differential measurement the voltage across the completion resistor is measured with the differential voltage measurement. Use voltdiff() for the crbasic dataloggers (for example, cr1000, cr5000, or cr9000(x)). Use instruction 2 for edlog datal...

  • Page 10: 4.  Transducer Wiring

    Curs100 100 ohm current shunt terminal input module figure 3-1. Curs100 l terminal connected to a datalogger g terminal using a jumper wire. Normally the l terminal on the curs100 should be connected to a datalogger g terminal (power ground) with a jumper wire (figure 3-1). Connecting the l terminal...

  • Page 11

    Curs100 100 ohm current shunt terminal input module datalogger transducer i h l g +12 v signal power figure 4-1. 2-wire with datalogger power datalogger transducer i h l g signal power battery – + figure 4-2. 2-wire with external power 4.1.1 possible ground loop problems the resistor must be grounde...

  • Page 12

    Curs100 100 ohm current shunt terminal input module transducer and everything is fine. However, if the battery voltage drops to 11 volts, a 20 ma current will leave just 9 volts for the transducer. In this case, when the battery drops below 11 volts, the output of the transducer may be in error. Tra...

  • Page 13

    Curs100 100 ohm current shunt terminal input module datalogger transducer i h l g signal power battery – + ground figure 4-5. 3-wire with external power 4.3 four-wire transducers a four-wire transducer has separate wires for power input and ground and for signal output and ground. The signal ground ...

  • Page 14

    Curs100 100 ohm current shunt terminal input module 5. Sensor and programming example in this example, the input voltage range, and the multiplier and offset values are calculated for a 4 to 20 ma output pressure transducer. Examples showing the differential measurement made on channel 1 are then gi...

  • Page 15

    Curs100 100 ohm current shunt terminal input module and at 700 psi is: v = 0.020 × 100 v = 2.0 v or 2000 mv since the datalogger measures in mv, the multiplier (or slope) must be in units of psi/mv. Therefore, the y values have the units psi and the x values mv. The equation of a line is: (y ─ y1) =...

  • Page 16

    Curs100 100 ohm current shunt terminal input module 10 beginprog scan (1,sec,1,0) 'generic 4-20 ma input measurement measure: voltdiff (measure,1,mv2500,1,true,0,_60hz,0.0625,-25.0) calltable (hourly) nextscan endprog 5.4 cr9000(x) program example voltdiff(press_psi, 1, mv5000, 5, 1, 1, 0, 0, 0.3125...

  • Page 18

    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 sc...