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PUF系列便攜式超聲流量計(jì)套件，利用傳輸時(shí)間差測(cè)量管道流量。 它是一款小巧輕便的儀器，采用了的電子和信號(hào)處理技術(shù)，實(shí)現(xiàn)了高性能和易于操作。 該設(shè)備內(nèi)置電池，可連續(xù)工作20小時(shí)。 PUF配備了一個(gè)IP67的保護(hù)箱，帶有模制泡沫插入件，以容納和保護(hù)所有設(shè)備，防止灰塵和水。 屏幕提供易于閱讀的文本與方便的背光。 功能鍵的有效布局增加了本單元的易于使用的編程。 該設(shè)備配有RS232和USB接口，可以方便地連接到任何個(gè)人電腦或打印機(jī)。

操作原理 兩個(gè)傳感器被放置在管道的外部，每個(gè)傳感器通過(guò)管道和流體向另一個(gè)發(fā)送超聲波脈沖。液體流經(jīng)管道的速度使脈沖加速或減速。利用兩個(gè)脈沖的傳輸時(shí)間之差來(lái)計(jì)算流量。通過(guò)時(shí)間的使用使流量計(jì)不受壓力或溫度變化的影響。

Service:Homogeneous liquids that do not contain air bubbles capable of ultrasonic wave propagation.

Inputs:Lemo connector cable from sensors.

Range:0.33 to 65.62 ft/s (0.1 to 20 m/s).

Display:240 x 64 pixel graphic display, high contrast black on white with backlight; Languages: English, French, German, Swedish, Italian, Spanish, Portuguese, Russian, Norwegian, and Dutch; 5.2" W x 1.5" H (132.1 x 38.1 mm).

Accuracy:± 0.5 to 2% of flow reading for flow rate > 0.66 ft/s (0.2 m/s) and Pipe ID > 3 in (75 mm). ± 3% of flow reading for flow rate > 0.66 ft/s (0.2 m/s) and Pipe ID in range 0.5 to 3 in (13 to 75 mm). ± 6% of flow reading for flow rate < 0.66 ft/s (0.2 m/s).

Power Requirements:9 to 24 VDC; (1) 5-Cell NiMH battery, internal, factory replaceable (continuous operation time: 20 hours with back light and output off); (recharging time: 6.5 hours, power adapter used).

Power Consumption:10.5 W.

Power Adapter:110/240 VAC adapter; UK,US, European adapters included.

Temperature Limits:-4 to 275°F (-20 to 135°C).

Outputs:

Analog:
1 opto-isolated output: 4 to 20 mA, 0 to 16 mA or 0 to 20 mA (selectable); Error current: 0 to 26 mA (selectable); Load resistance: 620 O max;
Pulse:
1 opto-isolated MOSFET relay, 150 mA max, 500 pps max, 200 Hz max.

Serial Communications:USB; RS-232.

Enclosure Rating:Transducers: IP51; Carrying Case: IP67; Converter: IP54.

Materials:Flame retardant injection molded ABS plastic.

Repeatability:±0.5 % of measured value or ±0.066 ft/s (0.02 m/s).

Electrical Connections:Multi-pin Lemo plugs.

Turbidity:<3% by volume of particulate content.

Permissible Air Content:<3% by volume.

Response Time:<500 ms.

Weight:Unit without accessories: 2.30 lb (1.06 kg); Unit with accessories in carrying case: 14.40 lb (6.52 kg).

Agency Approvals:CE.

ADDITIONAL SPECIFICATIONS

Applicable Pipe Material:Carbon steel, SS, copper, UPVC/PVDF, concrete, galvanized steel, mild steel, glass, brass.

Applicable Pipe Lining:Rubber, glass, concrete, epoxy, steel, other*.

Pipe Wall Thickness:0.04 to 3" (1 to 75 mm).

Pipe Lining Thickness:< 1" (< 25 mm).*Selectable option for special material with known propagation rate of the lining material.