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2H Portable Photometer
Printable
Specification Sheet
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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