1. DL manuals
  2. Campbell
  3. Test Equipment
  4. A547
  5. Instruction Manual

Campbell A547 Instruction Manual

Summary of A547

  • Page 1

    Instruction manual cs547 conductivity and temperature probe and a547 interface revision: 9/00 c o p y r i g h t ( c ) 1 9 9 4 - 2 0 0 0 c a m p b e l l s c i e n t i f i c , i n c ..

  • Page 2: Warranty and Assistance

    Warranty and assistance the cs547 conductivity and temperature probe and a547 interface 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...

  • Page 3: Table of Contents

    I cs547 probe and a547 interface table of contents pdf viewers note: these page numbers refer to the printed version of this document. Use the adobe acrobat® bookmarks tab for links to specific sections. 1. Overview......................................................................1 1.1 ec sensor...

  • Page 4

    Cs547 probe and a547 interface table of contents ii 9. Deriving a temperature compensation coefficient ..............................................................15 10. Instruction 11 details..............................................15 11. Electrically noisy environments.........................

  • Page 5: Probe and A547 Interface

    1 cs547 conductivity and temperature probe and a547 interface 1. Overview the cs547 conductivity and temperature probe, and a547 interface are designed for measuring the electrical conductivity, dissolved solids, and temperature of fresh water with campbell scientific dataloggers. They require the u...

  • Page 6: 2.  Specifications

    Cs547 conductivity and temperature probe and a547 interface 2 a547 logan, utah made in usa a547 interf ace ag se tem p ex temp ex cond datalogger sensor hi co n d lo cond shield shield temp cond ex c on d ex temp figure 1-1. A547 interface and cs547 conductivity and temperature probe 2. Specificatio...

  • Page 7: 3.  Installation

    Cs547 conductivity and temperature probe and a547 interface 3 2.3 temperature sensor thermistor betatherm 100k6a1. Range 0 °c to 50°c. Accuracy error ±0.4 °c (see section 8.2). 3. Installation rapid heating and cooling of the probe, such as leaving it in the sun and then submersing it in a cold stre...

  • Page 8: 5.  Programming

    Cs547 conductivity and temperature probe and a547 interface 4 ag se temp ex temp d a t alogger sensor ex temp temp cond ex cond ex cond hi cond lo cond shield shield figure 4-1. Cs547 wiring diagram for example below 5. Programming 5.1 programming overview typical datalogger programs to measure the ...

  • Page 9

    Cs547 conductivity and temperature probe and a547 interface 5 *table 1 program 01: 5 execution interval (seconds) ;make a preliminary measurement of resistance for autoranging. 1: full bridge (p6) 1: 1 reps 2: 15 ±2500 mv fast range 3: 1 diff channel 4: 1 excite all reps w/exchan 1 5: 2500 mv excita...

  • Page 10

    Cs547 conductivity and temperature probe and a547 interface 6 9: full bridge (p6) 1: 1 reps 2: 15 ±2500 mv fast range 3: 1 diff channel 4: 1 excite all reps w/exchan 1 5: 2500 mv excitation 6: 1 loc [ rs ] 7: -.001 mult 8: 1 offset 10: br transform rf[x/(1-x)] (p59) 1: 1 reps 2: 1 loc [ rs ] 3: 1 mu...

  • Page 11

    Cs547 conductivity and temperature probe and a547 interface 7 19: z=x*f (p37) 1: 5 x loc [ rp ] 2: -.1 f 3: 5 z loc [ rp ] 20: z=x+f (p34) 1: 5 x loc [ rp ] 2: -.005 f 3: 5 z loc [ rp ] 21: z=x+y (p33) 1: 1 x loc [ rs ] 2: 5 y loc [ rp ] 3: 1 z loc [ rs ] ; ;ec is then calculated by multiplying the ...

  • Page 12

    Cs547 conductivity and temperature probe and a547 interface 8 the following program segment automatically chooses which correction to apply to the measurement. ; ;the following program set corrects for errors of ionization in the ec ;measurement. ; 25: if (xf) (p89) 1: 3 x loc [ ct ] 2: 4 3: .474 f ...

  • Page 13

    Cs547 conductivity and temperature probe and a547 interface 9 ;this next program set will correct errors in the ec measurement resulting ;from temperature differences. ; 31: z=x+f (p34) 1: 4 x loc [ temp_degc ] 2: -25 f 3: 6 z loc [ a ] 32: z=x*f (p37) 1: 3 x loc [ ct ] 2: 100 f 3: 7 z loc [ loo_ct ...

  • Page 14: 6.  Calibration

    Cs547 conductivity and temperature probe and a547 interface 10 *table 2 program 02: 0.0 execution interval (seconds) *table 3 subroutines end program (end) 6. Calibration 6.1 conversion factors 1 s (siemens) = 1 mho = 1/ohm although ms·cm -1 and µs·cm -1 are the commonly used units of ec, the si bas...

  • Page 15

    Cs547 conductivity and temperature probe and a547 interface 11 3. Connect the cs547 and a547 or probe and interface to the datalogger using the wiring described in section 4. Enter the following program into the datalogger. The calibration solution temperature must be between 1°c and 35°c; the polyn...

  • Page 16: 7.  Maintenance

    Cs547 conductivity and temperature probe and a547 interface 12 09: z=x+f (p34) 01: 2 x loc t 02: -25 f 03: 3 z loc [(t-25).01] 10: z=x*f (p37) 01: 3 x loc (t-25).01 02: .01 f 03: 3 z loc [(t-25).01] 11: polynomial (p55) 01: 1 rep 02: 3 x loc (t-25).01 03: 4 f(x) loc [f(t) ] 04: .99124 c0 05: -1.8817...

  • Page 17

    Cs547 conductivity and temperature probe and a547 interface 13 correction of ionization errors: figures 8.1-1 and 8.1-2 show the amount of correction applied by the example program to compensate for ionization effects on the measurements. Also shown is an ideal correction. Factors were derived by me...

  • Page 18

    Cs547 conductivity and temperature probe and a547 interface 14 8.2 temperature measurement error the overall probe accuracy is a combination of the thermistor's interchangeability specification, the precision of the bridge resistors, and the polynomial error. In a "worst case" all errors add to an a...

  • Page 19: 10.  Instruction 11 Details

    Cs547 conductivity and temperature probe and a547 interface 15 9. Deriving a temperature compensation coefficient 1. Place the cs547 in a sample of the solution to be measured. Bring the sample and the probe to 25°c. 2. Enter the example program from section 5.2 in the datalogger and record c t at 2...

  • Page 20

    Cs547 conductivity and temperature probe and a547 interface 16 table 10-1. Temperature , resistance, and datalogger output 0.00 351017 -0.06 2.00 315288 1.96 4.00 283558 3.99 6.00 255337 6.02 8.00 230210 8.04 10.00 207807 10.06 12.00 187803 12.07 14.00 169924 14.06 16.00 153923 16.05 18.00 139588 18...

  • Page 21

    Cs547 conductivity and temperature probe and a547 interface 17 example 2. Sample cr10(x) instructions using ac half bridge 01: ac half bridge (p5) 01: 1 rep 02: 22** 7.5 mv 60 hz rejection range 03: 9* in chan 04: 3* excite all reps w/exchan 3 05: 2000** mv excitation 06: 11* loc [:air_temp ] 07: 80...

  • Page 22: 13.  Cs547 Schematic

    Cs547 conductivity and temperature probe and a547 interface 18 02: polynomial (p55) 01: 1 rep 02: 11* x loc temp_c 03: 11* f(x) loc [:temp_c ] 04: -53.46 c0 05: 90.807 c1 06: -83.257 c2 07: 52.283 c3 08: -16.723 c4 09: 2.211 c5 * proper entries will vary with program and datalogger channel and input...

  • Page 23

    Cs547 conductivity and temperature probe and a547 interface 19 figure 13-2. A547 interface circuit diagram ex temp ex cond cond temp shield ex cond hi cond lo cond ag se temp ex temp shield datalogger connections sensor connections r2 1k 1k r1 220µfd + 220µfd + 220µfd + 220µfd +.

  • Page 24

    Cs547 conductivity and temperature probe and a547 interface 20 this is a blank page..

  • Page 25

    This is a blank page..

  • Page 26

    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 sales@csafrica.Co.Za campbell scientif...