Brookfield DV-II+ Digital Viscometer Manual de usuario descargar pdf (Pagina 42)

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Shear Stress (

Dynes

)=TK

SMC

SRC

Torque

= 0.09373 * 32.0 * 0.34 * 62.3

= 63.5

Dynes

The following is a program written in BASIC that receives these strings, parses out the appropriate

data, performs the above calculations and displays the data to the screen.

100 ‘+ +

110 ‘| DV-II+ Communications Demonstration |

130 ‘| Written by Richard Trudell & Greg Krysko |

140 ‘+ +

150 CLS

160 PRINT SPC(26); “Brookfield Engineering Labs”

170 PRINT SPC(19); “DV-II+ Communications Demonstration Program”

190 PRINT

200 PRINT “This program is intended to demonstrate the method for obtaining”

210 PRINT “data from the Brookfield Engineering Labs DV-II+ using an RS-232”

220 PRINT “port.”

230 PRINT “This program and/or any of the methods used within may be freely”

240 PRINT “used in your own applications.”

250 PRINT

260 PRINT “Press any key to continue...”

270 KEYPRESSED$ = “”

280 WHILE KEYPRESSED$ = “” ‘

Wait for keypress

290 KEYPRESSED$ = INKEY$

300 WEND

310 CLS ‘ Clear display screen

320 OPEN “COM1:9600,N,8,1,CS,DS,CD” FOR RANDOM AS #1 ‘ Open com port #1

330 LF$ = CHR$(10) ‘ Initialize variables

340 ESC$ = CHR$(27)

350 KEYPRESSED$ = “”

360 WHILE KEYPRESSED$ <> ESC$

370 GOSUB 790

380 LF = INSTR(DS$, LF$)

390 IF LF THEN DS$ = LEFT$(DS$, LF - 2)

400 LOCATE 1, 1

410 PRINT “Here is DV-II+ Viscometer raw output data string”;

420 LOCATE 2, 1

430 PRINT DS$;

440 ‘+ +

450 ‘| Parse Viscometer data string into constituent parts |

460 ‘+ +

470 TOR$ = MID$(DS$, 29, 4) ‘ Torque is char’s 29 - 32

480 CPS$ = MID$(DS$, 39, 9) ‘ Centipoise Value is char’s 39 - 47

490 SHS$ = MID$(DS$, 55, 5) ‘ SS Value is char’s 55 - 59

500 SHR$ = MID$(DS$, 67, 5) ‘ SR Value is char’s 67 - 70

510 RPM$ = MID$(DS$, 6, 3) ‘ Spindle speed is char’s 6 - 8

520 MDL$ = MID$(DS$, 13, 5) ‘ Viscometer model is char’s 13 - 17

530 SPD$ = MID$(DS$, 24, 2) ‘ Viscometer spindle is char’s 24 - 26

540 TMP$ = MID$(DS$, 75, 5) ‘ Temperature starts at char 75

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 50 51

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Brookfield DV-II+ Digital Viscometer Manual de usuario Pagina 42

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