Heath-consultants Hi Flow Sampler Manual de usuario descargar pdf (Pagina 6)

Hi Flow



Sampler Introduction

6 Instruction 0055-9017

The main unit consists of an intrinsically safe, high-flow blower that pulls air from

around the component being tested through a flexible hose and into a gas manifold

located inside the unit. The sample is first passed through a venturi restrictor where the

measured pressure differential is used to calculate the sample’s actual flow rate. Next, a

portion of the sample is drawn from the manifold and directed to a combustibles sensor

that measures the sample’s CH

concentration in the range of 0.05 to 100% gas by

volume. A second identical combustibles sensor channel measures the background CH

level within the vicinity of the leaking component. The final element in the sampling

system is a blower that exhausts the gas sample back into the atmosphere away from

the sampling area.

The measured flow rate and the measured CH

levels (both leak and background levels)

are used to calculate the leak rate of the component being tested, with all measured

and calculated values being displayed on the hand-held control unit.

1.2 Material Supplied

• High Flow Sampler Unit

• Backpack

• 6 Foot, 1.5 Inch Hose Assembly

• Battery Pack (Qty. 2)

• Battery Charger w/ Power Supply

• Control Unit with LCD and 4-button keypad

• Assortment of Attachments (for complete capture of the gas leak)

• Flange Strap 34", 80", and 137"

• Capture Bag 36" x 36"

• Beveled Nozzle 6.5" and 24"

• Bag Nozzle

• Bellows Tool

• Claw Tool

1.3 Why Use the Hi Flow



Sampler?

• Allows ranking of gas leaks in leak-rate order

• Allows users to determine if the potential savings in lost gas by repairing a leak

• Allows users to determine payback periods for particularly expensive repairs

• Allows more cost-effective use of your maintenance budget

• Identifies problem areas

• Determines baseline leakage conditions

• EPA Best Management Practice Tool for Directed Inspection and Maintenance

Programs at Natural Gas Facilities

• Provides permanent record of leakage and repair

• Approved Measurement tool in conjunction with United Nations Framework

Convention on Climate Change Methodology 0023, Leak Reduction at Natural Gas

Facilities

• Pays for itself in recovered gas

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