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The Optical Head is
built of heavy gauge aluminum parts and finished with acid-resistant enamel
paint. All exposed hardware is stainless steel. The rugged design and extremely
low heat generation allows operation over a wide range of ambient temperatures.
It is built to withstand the typical hostile environment associated with outdoor
industrial applications, including substantial shock and vibration.
TML has paralleled the design of the LaserHawk™
from its Model 560 LightHawk® Compliance Opacity Monitor and the UltraFlow-150
Ultrasonic Flow Monitor. All utilize the same Enhanced Remote Panel;
communication protocols, and mounting hardware. This saves the customer valuable
inventory dollars and permits the use of spares on a variety of equipment.
Features:
Purge System
A purge air system is furnished with each LaserHawk™. The system supplies purge
air to the Optical Head, protecting the instruments from stack gases and
significantly reducing maintenance intervals. A purge air sensing switch is
provided in case of power loss or interruption. Purge fail/power fail alarm is
standard.
LaserHawk™ Optical Head
The optical head is housed in a rugged NEMA 4 aluminum casting. The optical head
contains the active electronics necessary to project a laser beam into the
stack/duct and to receive back the scattered energy off the particulate. The
sealed optical head subassembly is designed for simple cover removal, allowing
complete access to the electronics
Optical Head Keyboard/Display
Uses a 10 button keypad & 6 digit readout to display and/or enter:
• Instantaneous particulate concentration (mg/m3 or gr/dscf)
• Average particulate concentration
• Zero calibration
• Upscale calibration
• Dust compensation
• Status codes
• Diagnostic data about the analog signals inside the optical head (no need to
open the optical head)
• Particulate concentration curves
• Optical gains
Remote Display Panel
Uses a large, back-lit, LCD graphics display with English-language, menu-driven
screens, providing ready access to all information needed for full use of the
system. In addition, the user can graph up to the most recent 100 values of a
selected parameter, such as:
• Instantaneous dust concentration , average dust concentration
• Calibration values (zero, upscale, or dust com pensation)
The keypad, a rugged 20-button ensemble inlaid under a tough, hard coated,
scratch and chemical-resistant Lexan coating, can be used to:
• Display dust concentration on a mg/m3 or gr/ dscf basis
• Identify the cause of an alarm or malfunction
• Configure the relay outputs
• Configure the analog outputs
• Edit parameters such as voltages, currents and gains
• Set alarm values for dust concentration, zero cal and upscale cal
• Load correlation curves for particulate concentration
The Optical Head and Enhanced Remote
Panel of the LaserHawk™ are interconnected via a commercial network protocol,
using transformer isolated data lines which nearly eliminate the potential
effects of electro-static discharge. This approach provides great flexibility in
choices of options and interconnect topology. One twisted pair is required for
each system interconnection. The Optical Head and Remote Panel provide all
parameters needed for maintenance and diagnostics. It is easily configured to
any plant, Digital Control System, Data Acquisition System or control system.
Calibration Kit
The calibration kit, standard with the LaserHawk™, is used as an additional
check of the unit’s proper operation and calibration. The cal fixture attaches
to the front face of the optical head and various audit standards can be
inserted to challenge the instrument over the dynamic dust concentration range
that is established during on-site calibration. A zero (clear) condition can
also be established.
Ideal For OEM Applications
The LaserHawk™ is easy to calibrate, but for ideal accuracy, it should be
calibrated on-site using Method 5 or 17 Isokinetic Testing by a third party.
Once the linear, exponential or polynomial correlation curve is input via the
keypads on either the Optical Head or Enhanced Remote Panel, the cal kit can be
used to set up zero, low, medium and high energy levels in the appropriate
scale. User friendly menus on the keypads enable adjustments of gains and
currents to ensure proper operation of the monitor. No potentiometer adjustments
or resistor changes are required. Instantaneous or average dust concentration
can be transmitted directly to a Data Acquisition System or via optically
isolated analog signals, network or serial communication.
Ideal For Retrofit Applications
The LaserHawk™ is a compact design that can be installed on ducts or stacks
using a single 4-in. mounting port. There is virtually no alignment necessary
since there is no reflector assembly. Adapters are available to match any 3-6
in. existing mounting flange.
With an optional I/O module, the Optical Head meets all PS-11 requirements
without the need for a Remote Panel. The LaserHawk is ideal for OEM
applications.
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