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RTD "use" with regard to SPICE
3 Attachment(s)
Set up standard use configuration , according to RDF, "scaled" to a
1000 ohm (film) RTD. Made narrow range plots of resistance VS temperature around three temperatures of interest, with the bridge theoretically balanced WRT the table from Minco; the RTD value from the equation provided by Minco (all 3 terms). Note that the bridge is NOT balanced at the desired temperature. WTF??? Version 4 SHEET 1 1220 680 WIRE 128 -16 -128 -16 WIRE 128 48 128 -16 WIRE 128 48 32 48 WIRE 224 48 128 48 WIRE 352 48 304 48 WIRE 224 128 192 128 WIRE 352 128 304 128 WIRE -128 144 -128 -16 WIRE 32 160 32 128 WIRE 32 160 0 160 WIRE 96 160 32 160 WIRE 192 160 192 128 WIRE 192 160 176 160 WIRE 304 192 304 128 WIRE 0 208 0 160 WIRE 192 208 192 160 WIRE 528 224 416 224 WIRE 560 224 528 224 WIRE 32 240 32 160 WIRE 224 240 224 192 WIRE 416 256 416 224 WIRE 528 256 528 224 WIRE 128 320 32 320 WIRE 224 320 128 320 WIRE 416 368 416 336 WIRE 528 368 528 336 WIRE 528 368 416 368 WIRE -128 384 -128 224 WIRE 128 384 128 320 WIRE 128 384 -128 384 WIRE 416 400 416 368 WIRE 128 432 128 384 FLAG 128 432 0 FLAG 416 400 0 FLAG 560 224 TEMP FLAG 0 208 VM1 FLAG 192 208 VM2 SYMBOL res 16 32 R0 SYMATTR InstName R1 SYMATTR Value 1000 SYMBOL res 16 224 R0 SYMATTR InstName R2 SYMATTR Value 1K SYMBOL res 208 224 R0 SYMATTR InstName R3 SYMATTR Value 1K SYMBOL res 336 32 R0 WINDOW 3 31 89 Left 0 WINDOW 0 36 56 Left 0 SYMATTR Value 1000 TC={.0039083} {-5.775E-7} {-4.183E-12} SYMATTR InstName R4 SYMBOL res 320 32 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 -31 10 VTop 0 SYMATTR InstName R5 SYMATTR Value 1 SYMBOL res 320 112 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 -29 23 VTop 0 SYMATTR InstName R6 SYMATTR Value 1 SYMBOL res 320 176 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 4 -2 VTop 0 SYMATTR InstName R7 SYMATTR Value 1 SYMBOL res 192 144 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R8 SYMATTR Value 1E6 SYMBOL voltage -128 128 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 1V SYMBOL voltage 416 240 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V2 SYMATTR Value 20 SYMBOL res 512 240 R0 SYMATTR InstName R9 SYMATTR Value 1K TEXT 408 -24 Left 0 !.dc TEMP 0 200 1 TEXT 416 8 Left 0 ;PLOT I(R8) TEXT 512 80 Left 0 !.OPTIONS TNOM=0 TEXT 80 -56 Left 0 ;Want 3 plots on same pane: STEP R1 1077.935 1385.055 1703.271 |
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