5
Gambar 7. Pengukuran Solinst Water Level Meters Sumber: www.envco.com
2.6.2 Alat Ukur Tinggi Muka Air
Otomatis
Automatic Water Level Recording
2.6.2.1 Jenis Pelampung
Untuk AWLR jenis pelampung dengan pelampung sensor yang dipasang di
permukaan air
sehingga pelampung
mengikuti perubahan ketinggian permukaan air, perubahan tersebut dirubah dalam gerak
putaran sudut dan diteruskan pada visualisasi pencatatan.
Sangat banyak
contoh yang
menggunakan prinsip ini dengan sedikit pengembangan
mengenai sistem
pengukurannya seperti AWLR pelampung tipe Richard, Thalimedes dan AWLR basis
Kalkulator Printing. Keuntungan alat ini sudah bersifat
otomatis sehingga mampu mengukur secara kontinu, sedangkan untuk kerugiannya harus
membuat sumur peredam dan respon time yang dihasilkan lambat
Gambar 8 AWLR Richard Sumber :
www.novalynx.com
Spesifikasi AWLR Richard Sensor
: Counterbalanced float Ranges
: 0-10, 0-20, and 0-30 0-3 m, 0-6 m, and 0-10 m
Chart size : 4.75 H x 11.5 L 121 mm x
292 mm Graduations :
0.2 0-10 range 0.4 0-20 range
0.5 0-30 range 50 mm 0-3 m range
100 mm 0-6 m range 200 mm 0-10 m range
Resolution : 0.1 0-10 range
0.2 0-20 range 0.25 0-30 range
25 mm 0-3 m range 50 mm 0-6 m range
100 mm 0-10 m range
Clock type : 1.5 Vdc battery-operated 2 AA cells
Drum rotation: 1 day 26 hours, 7 days 176 hours, or 31 days, switch
Selectable Float size
: 2 Dia x 8 H 45 x 200 mm
Float cable : Stainless steel, 116 dia 1.588 mm, 38 11.5 m
provided Pen type
: Cartridge Size
: 13 L x 9.5 H x 7.5 D 330 x 241 x 191 mm
Weightshipping: 14 lbs26 lbs 6.4 kg11.8 kg
Gambar 9 AWLR Tipe H-334 Sumber: www.waterlog.com
Spesifikasi General
Input : Shaft angle + turn couat
Encoder : absolute, non-contact optical and magnetic
Outputs : SDI-12 and 4-20 mA Display : 4-12 Digits x, 4 in characters
Resolution : 65.536 16 Bit counts rev Accuracy
: 14096 .00024 rev Max. Turns
: ±32.768 rev Max. Rotation speed : 20 rev sec
Offset adjust : SDI-12 or front panel
adjust Mechanical
Bearing :double ball bearing with external seel
Starting torque : 0.15 oz in typical, 0.5 oz in max over temperature
6
Standart shaft : 516 in, diameter x 1.25 in, long, with setscrew flat
Optional threaded shaft : 516 in, diameter x 1.75 in, long, 24-threads per in. X 0.75
in Material : anodized alumunium
Size :5.25 in wide housing
7.0 in wide mount flange 4.0 in deep
Gambar 10. AWLR OTT Thalimedes
Sumber : http:www.ott-hydrometry.com
Gambar 11. Skematik AWLR OTT Thalimedes Sumber :
http:www.ott-hydrometry.com
Specs
Range: +- 199.99 ft.
Accuracy: +- 0.007 ft. 0.002m
Resolution: +- 0.01 ft.
Gambar 12 Sonic Water Level Meter Sumber: www.envco.com
Specifications Sonic Water Level Meter Measurement range : Normal 10-500 or
Deep up to 1200 Readout accuracy
: +0.1 Measurment accuracy : +0.2 of
reading Operating temperature
: 30-140 F Power
: 8 AA dry cell batteries
Length : 7; Height: 4,
Width: 5 Sonic measuring duct diameter: 58
Hole diameter must be at least large enough for 12 pipe thread.
Sonic measuring duct length: 2 Weight
: 3 12 lbs.
2.6.2.2 Jenis Rol Otomatis
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