英文詳細(xì)介紹：

Description

The 2H is the latest digital photometer available in a portable self-contained unit. The 2H has been designed with the user in mind for simplicity of operation and virtually maintenance-free use. Its basic purpose is to detect and measure mass concentration of aerosol. Three-stage airflow sensor and optics indicator lights improve data reliability.

The microprocessor-controlled 2H enables the operator to quickly set operating functions and parameters. It is easily programmed and operates with just 7 push buttons. The digital display has a set-up menu and diagnostic codes for operator convenience. The range of concentration measurable is from 100 to 0.0001 µg/l. The 2H has two pre-set reference values （DOP & PAO） for aerosol agents as well as a USER setting, which allows storage of a sampled concentration to be retained as a reference value.

2H Portable Photometer Specifications

SIZE: 10.1” x 14.3” x 5.8”
25.7 cm x 36.3cm x 14.7 cm
WEIGHT: 15.5 lbs. plus 2.5 lbs. for scanning probe and accessories = 18.0 lbs 7.0 kg plus 1.1 kg for scanning probe and accessories = 8.2 kg.
ENCLOSURE: Instrument enclosure is rugged, die cast aluminum and can be easily disassembled as required for recalibration and service of internal components. The enclosure has a swiveling handle that also acts as a support, permitting tilting of the control panel display for easy viewing, as well as increasing the ease of transport.
POWER: 100 to 250 volts AC, 50/60 Hz fused power entry module with spare fuses. Automatically adjusts to virtually all standard voltages used worldwide. Please specify power supply cable when ordering unit.
AUTO-RANGING: Automatic from 0.0001% to 100.0%. Provides 6 decades of display and eliminates the manual range selection switch.
AUTO ZERO: Automatically establishes zero by pressing the 0% button when sampling the airflow through the internal ULPA reference filter in the clear mode. Automatically establishes downstream reading as zero by pressing the 0% button when sampling the downstream airflow.
ALARM: Audible alarm in unit sounds when adjustable set point is exceeded. Visible alarm flashes on control panel and scanning probe. Audible portion of alarm can be disabled.
BARGRAPH: Solid-state bar graph with high visibility green LED on control panel and scanning probe.
AMPLIFIER: Solid-state linear amplifier.
PHOTOMETER ACCURACY: 1% of full scale for the decade in use in ratio metric mode.
DIGITAL DISPLAY: Shows % Leakage from 0.0001% to 100.0%
DYNAMIC RANGE: 0.0001 to 125 micrograms per liter. Improved firmware prevents system errors by blanking the display when sampling above 125 micrograms per liter; display is restored when concentration is lowered. "HIGH" mode enables sampling of concentrations exceeding 200 micrograms per liter.
LIGHT SOURCE: Long lasting, stable, solid-state scattering chamber light source. Photometer operates at low power, generating low heat, and low stray light values. Life expectancy is 50,000 to 100,000 hours.
REPEATABILITY: 0.5% full scale
SCATTERING CHAMBER: Field-tested design for efficient and reliable performance. A three-stage “OPTICS” indicator ensures accurate internal reference response; green indicates internal reference within 5% of original value, orange indicates internal reference shifted to 5-10% of original value, and red indicates that the internal reference has shifted by more than 10%.
VACUUM PUMP: True 1 cubic foot per minute （cfm） sample rate （28.3 liters per minute） using a twin head, carbon vane pump for quiet operation and dependability. A HEPA filter is externally integrated at the outlet of the vacuum pump entrapping any particles from the pump exhaust. A “FLOW” indicator ensures operation within required parameters.
OUTPUT: A DB9 connector is provided standard on all units for RS232 output

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5C Features
The 5C has all controls and displays grouped on the front panel away from the aerosol generator output nozzle. The unit has a large aerosol liquid capacity for operation up to 4 hours at full output without refilling. In addition, its digital temperature control allows the operator to set the unit for optimum conditions for the specific aerosol agent being used.

The 5C is capable of generating a wide variety of aerosol concentrations by discharging a controlled quantity of oil into a large heated area. The liquid is vaporized and condensed into a polydispersed aerosol while in the presence of a small amount of nitrogen delivered at approximay five pounds of pressure. The efficiency at which the aerosol is produced enables the 5C Generator, when used in conjunction with Analog or Digital photometers, to provide enough aerosol to leak test filtration systems from 1,500 to 65,0000 cfm. Systems larger than 6,500 cfm may be tested for leaks at less than 100 micrograms per liter when the photometer sensitivity is increased.

5C Specifications
Aerosol Output Range: 1,500-65,000 cfm
Aerosol Concentration 100 ug/1@*: 6,500 cfm
Aerosol Concentration 10 ug/1@*: 65,000 cfm
Generator Type: Vapor Condensation
Compressed Air: Not Required
Compressed Gas: Nitrogen, Argon, Carbon Dioxide or Helium （*20 cfh @ 50 psi）
Aerosol Type: Polydispersed （Cold）
Size: 15" L × 9" W × 10" H
（38cm L × 23cm W × 25cm H）
Weight-Pounds （lbs）: 23 lbs.
Weight-Kilograms （kg）: 10.4 kg
Electrical: 115 VAC / 60 Hz or 230 VAC / 50hz
 

Compliance:

* For high volume output, more uniform particle size, and safety, the liquid is aerosolized, superheated to vapor then recondensed by ambient air into a cold poly-dispersed aerosol. The propellant must be an inert gas since the liquid vapor temperature is above the liquid flashpoint.

Please note:
ATI does not recommend the 5C for certification of Biological Safety Cabinets （BSC's）.  Typical BSC flowrates are beneath the level at which a 5C is capable of providing a consistent and stable aerosol output. 

NSF/ANSI 49-2002 Annex F, specifies the use of a Laskin nozzle generator or equivalent during certification. 
For purposes of this NSF Standard's requirements, the 5C generator is not considered a Laskin nozzle equivalent aerosol generator.

Applications

• Clean Rooms
• HEPA Vacuum Cleaners
• HVAC Systems
• HEPA Filters
• ULPA Filters
• Negative Pressure Filtration Units
• Surgical Suites
• Nuclear Filter Banks
• Collective Protection Filters
• Research and Development
   

Industries

• Pharmaceutical
• Food Processing
• Veterinary Medicine
• Laboratories
• Asbestos Abatement
• Heavy Metal Processors
• Nuclear Power and Fuel
• Hospitals
• Chemical Processing
• Certifiers
• NBC Defense Agencies
• Governmental Labs
• Filter Manufacturers
• Micro Electronic
• Electronic
• Biotechnology
• Micromechanics