Cho thuê máy đo lưu lượng chất khí bằng siêu âm - TransPort PT878GC

1.    Applications

The TransPort PT878GC clamp-on gas flowmeter is a complete ultrasonic flow metering system for measurement of most gases, including:

+     Natural gas

+     Compressed air

+     Fuel gases

+     Erosive gases

+     Corrosive gases

+     Toxic gases

+     High-purity gases

+     Air separation gases

2.    Features

+     Clamp-on unobstructed installation

+     No wetted parts

+     No moving parts

+     Nopressure drop

+     Sound speed output

+     Standard volumetric flow calculation

+     Small, lightweight and easy to use

+     Large, backlit LCD display

+     Rechargeable battery pack

+     Logs over 100,000 flow data points

+     Submersible package

+     32 site locations

+     Optional thickness gauge

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PT878GC SPECIFICATIONS

Operation and Performance

Fluid Types

Acoustically conductive gases with minimum pressure requirements. See Installation Requirements table.

Pipe Size Ranges

• 0.75 to 12 in (20 to 300 mm) with TransPort PT878GC-01 electronics

• 4 to 24 in (100 to 610 mm) and larger with TransPort PT878GC-02 electronics

Pipe Wall Thickness

Thicker walled pipes require greater gas density. See Installation Requirements Table.

Pipe Materials

All metals and plastics. No lined pipes.

Flow Accuracy (Velocity)

• For pipes 6 in (150 mm) and smaller: ±2% to 5% of reading typical

• For pipes over 6 in (150 mm): ±1% to 2% of reading typical

Accuracy depends on pipe size and other factors.

Repeatability

±0.2% to 0.5% of reading

Range (Bidirectional)

See Installation Requirements Table.

Rangeability (Overall)

150:1

Specif ications assume a fully developed flow prof ile (typically 20 diameters upstream and 10 diameters downstream of straight pipe run) and flow velocity greater than 5 ft/s (1.5 m/s). Pipes 2 inches (50 mm) or less require a minimum of 10 ft (3 m) of continuous straight run without flanges, welds or coupling joints.

Measurement Parameters

Standard and actual volumetric flow, flow velocity and mass flow

Electronics

Flow Measurement

Patented Correlation Transit-Time™ mode

Enclosure

Submersible IP67

Dimensions

Weight 3 lb (1.36 kg), size (h x w x d) 9.4 x 5.5 x 1.5 in, (238 x 138 x 38 mm)

Display

240 x 200 pixel backlit LCD graphic display

Keypad

25-key, rubberized tactile membrane keypad

Internal Battery

Rechargeable battery: 8 hours of continuous operation

Battery Charger Input

100 to 250 VAC, 50/60 Hz, 0.38 A

Memory

FLASH memory, field-upgradable

Operating Temperature

–20° to 55°C (–4° to 131°F)

Storage Temperature

–40° to 70°C (–40° to 158°F)

To ensure maximum battery life, storage temperature exceeding 35°C (95°F) is not recommended for more than one month.

Standard Inputs/Outputs

• One 0/4 to 20 mA current output

• One user-selectable pulse (solid state, 5 V maximum) or frequency (5 V square wave, 100 to 10,000 Hz)

• Two 4 to 20 mA analog inputs with switchable power supply for loop-powered temperature or pressure transmitter

Digital Interface

Infrared communication port for printer or PC interface

Site-Parameter Programming

• Menu-driven operator interface using keypad and “soft” function keys

• Online help functions including pipe tables

• Storage for saving site parameters

Data Logging

• Memory capacity to log over 100,000 flow data points

• Keypad programmable for log units, update times, and start and stop time

Display Functions

• Graphic display shows flow in numerical or graphic format

• Displays logged data

• Extensive diagnostic parameters

European Compliance

Battery-powered system complies with EMC Directive 89/336/EEC

Clamp-On Ultrasonic Flow Transducers

Temperature Ranges

• Standard: -40° to 130°C (-40° to 266°F)

• Optional (overall range): -40° to 230°C (-40° to 446°F)

Transducer Materials

Stainless steel and plastic

Mountings

Portable gas-transducer clamping fixtures in polycarbonate carrying cases:

• PCFG-1 for pipes smaller than 12 in (300 mm) in diameter

• PCFG-2 for pipes larger than 12 in (300 mm) in diameter

Mounting Couplant

CPL-16

Area Classifications

• Standard: General purpose

• Optional: Weatherproof Type 4 IP65

• Optional: Explosion-proof Class I, Division 1, Groups C,D

• Optional: Flameproof e II 2 G EEx md IIC T6–T3 (certification pending)

TransPort PT878GC electronics are designed for general purpose areas.

Transducer Cables

• Standard: One pair of LEMO® coaxial transducer connectors with 25-ft (8-m) cables

• Optional: 500-ft (154-m) extension cables available for most transducers

Thickness-Gauge Option

Transducer

GE dual-element transducer

Pipe-Thickness Range

0.05 to 3 in (1.3 mm to 76.2 mm)

Pipe Materials

Most standard metal and plastic pipe materials

Accuracy

±1% typical or ±0.002 in (±0.05 mm)

Thermal Exposure

Continuous operation to 37°C (100°F); intermittent operation to 260°C (500°F) for 10 seconds followed by two minutes air cooling

Additional Options

Printer

• Infrared, portable, thermal printer with rechargeable battery and 120 to 240 VAC power supply/recharger

• Weight 13 oz (370 g), size 6.3 x 6.5 x 2.3 in (160 x 164.2 x 59 mm), print width 4 in (104 mm)

RS232-to-Infrared

Infrared adapter plugs into any available serial port to give desktop PCs infrared capability