TDC-GP21 datasheet(87/91 Pages) AMSCO

87 / 91 page

Ultrasonic-Flow-Converter

TDC-GP21

6-4

acam messelectronic gmbh - Friedrich-List-Str.4 - 76297 Stutensee - Germany - www.acam.de

Send SO = ’hB4, Read SI = STAT

STAT&’h1E00 > 0: -> Error routine

Send SO = ’hB0, Read SI = RES_0

Send SO = ’hB1, Read SI = RES_1

Send SO = ’hB2, Read SI = RES_2

Send SO = ’hB3, Read SI = RES_3

Rhot/Rref = RES_0/RES_1

Rcold/Rref = RES_3/RES_2

Check-loop INTN = 0?

Send SO = ’hB4, Read SI = STAT

STAT&’h1E00 > 0: -> Error routine

Send SO = ’hB0, Read SI = RES_0

Send SO = ’hB1, Read SI = RES_1

Send SO = ’hB2, Read SI = RES_2

Send SO = ’hB3, Read SI = RES_3

Rhot/Rref = RES_0/RES_1

Rcold/Rref = RES_3/RES_2

Calculate the average of the two

measurements.

Go to look-up table to get the temperatures

Time-of-flight measurement every half

second:

Send SO = ’h70 Initialize TDC

Send SO = ’h05 Start_TOF_Restart

Check-loop INTN = 0? (up TOF)

Start

Wait for 2.8μs (ALU time)

Send SO = ’hB0, Read SI = RES_0

Send SO = ’hB1, Read SI = RES_1

Send SO = ’hB2, Read SI = RES_2

Send SO = ’h70 Initialize TDC

Check-loop INTN = 0? (down TOF)

Send SO = ’hB4, Read SI = STAT

STAT&’h0600 > 0: -> Error routine

Send SO = ’h81314000 calculate HIT2-

Start

Wait for 2.8μs (ALU time)

Send SO = ’h81414000 calculate HIT3-

Start

Wait for 2.8μs (ALU time)

Send SO = ’hB0, Read SI = RES_0

Send SO = ’hB1, Read SI = RES_1

Send SO = ’hB2, Read SI = RES_2

P can now start the data post-processing

and

calculate the flow and the heat.

Member of the ams Group

TDC-GP21 Datasheet(PDF) 87 Page - ams AG

TDC-GP21 Datasheet(HTML) 87 Page - ams AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91

Datasheet Download

Link URL