Input / Output From Optical Head
The
optical head features I/O that can be directly tied into a customer’s PLC or
DAS in the event a remote display is not required.
The Lighthawk ® has a 6-point I/O board that has:
Each
of the I/O channels is jumper configurable to enable easy interface.
A minimum of three pairs or a single pair (if a Remote Display is used)
of wires is all that’s required to interface the optical head to the PLC or
DAS.
The Internal Cal Mechanism
A
single
servo-drive motor with an optical encoder makes up the cal mechanism. Two
neutral density filter holders are mechanically connected to the motor shaft.
The servo drive is digital controlled for precise movement and its
position is continuously monitored. A
friction clutch and counterweight assembly provides vibration isolation of the
mechanism. The filter holders
hold interchangeable neutral density filters for easy calibration over all
path lengths. Camera irises,
housed in front of the filters, permit precise control over the energy
returned from the neutral density filters.
This precise control easy permits a LightHawk®
to be moved from one port to another.
The
Calibration Kit
 The
calibration kit is included with every monitor purchased and 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 has
been preset to return the same energy as the retro-reflector during a clear
stack condition. Calibrated NIST
traceable
neutral
density attenuators, can be inserted to
check the system upscale response.
Opacity
Monitor Purge System
The
LightHawk® utilizes 2”
Sch. 40 mounting pipe and therefore requires minimum purge air. This leaves
open the use of instrument air for customers that have available supply.
In the event instrument air is not available, a single or dual blower
system can be utilized. Purge air
flow is monitored by differential pressure switches and passive fail-safe
shutters are available as an option.
LightHawk
Remote Display Panel
A standard 19” rack mount yet only 5 ˝” high. The panel uses a
large, backlit LCD graphics display with a 20-button keypad inlaid under a
tough, hard-coated scratch and chemical resistant coating. The remote display
provides all the necessary
hardware and software for compliance reporting and
provides a backlit LCD display for viewing measured parameters, test point
 values, I/O configuration, alarm and fault set points, calibration information
and dust concentration algorithms. All software capabilities of the optical
head are duplicated in the remote display.
Graphics are also available; whereby 100 values of up to eight
different operating parameters can be plotted for analysis. Event logs are also included in the software whereby the last
twenty-four alarms and faults are logged along with a time stamp, diagnostic
code and current status. The
remote has two levels of security for protection.
The panel houses a Multi-I/O board that provides extensive I/O
capabilities. It includes:
-
4 isolated analog outputs
-
8
isolated digital inputs
-
8
isolated dry contacts
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The analog outputs are
configurable through the remote panel and can be independently scaled from
50-100% and are available as 4-20ma or 0-20ma.
The outputs can also be configured for units of opacity, optical density
or dust concentration.
Off-Stack
Zero Feature
Many States are beginning to
require annual off-stack zeros that can be cumbersome. The LightHawk® offers
a quick-disconnect optical head that can be easily lifted off, taken from
the stack and simply plugged in to conduct the off stack testing. The
retro-assembly is small and lightweight and is also easily detachable. A
unique feature is that if the optical head and retro are turned upside down,
they have pedestals that vertically align the system thereby precluding the
use of any off-stack zero fixture. It should be noted that regulations
require an annual off-stack zero to be conducted in a cleanroom to verify a
true zero. This necessitates the need to remove any monitor from the stack.
Calibration Features
The LightHawk® was designed with maximum versatility and control. Calibrations
can be conducted through four different methods providing ample flexibility to
handle routine or special data acquisition needs. The four methods are:
When, how long and how often the cal cycle should occur is programmable. The cal cycle output consists of (30-720 seconds) of zero, upscale, PLCF and window dirt compensation along with a corresponding contact closure.
Upgrade
Features
Teledyne Monitor Labs has an installed base of
opacity monitors in excess of 4000 units. Some of these older units are RM41’s,
Dynatron 1100M’s, MC2000’s, LS541 and 500C’s. At times, many customers opt to
upgrade their older units in lieu of purchasing new units. The LightHawk® has
been designed as an upgrade product for all of the above as well as several
other competing brands. Call for details.
Mechanical
Installation Requirements
Installing a
LightHawk® is simple. The LightHawk® utilizes a 2” 150# ANSI flange
that can match up to 3-6” existing flanges through optionally supplied
adaptors. The customer must provide 5 ˝” long mounting pipes if it is
a new installation. Only two 15amp power circuits are required to
power the blowers and optical head. If a Remote Display is purchased,
a single twisted pair of wire is the only requirement for the data
cable.
Specification
Sheet
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Optical Head
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17” L x 9 Ľ”W x 15”H
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6 ˝”L x 7” Diameter
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Blower
Assembly
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22 Ľ”L x 20”W x 33”H
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Enhanced
Remote Panel
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19”W x 5 Ľ”H x 8”D
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PHYSICAL
WEIGHTS
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Optical Head
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27lbs
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Retro Assembly
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6lbs
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Purge Blower
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65lbs
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Enhanced
Remote Display
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10lbs
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OPTICAL
CHARACTERISTICS
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Optical Source
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Light
Emitting Diode; Dynamically-Pulsed
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Optical
Measurement Technique
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Double
Pass - Opacity, Optical Density, or Dust
Mass
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Angle of View
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<4°
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Angle of
Projection
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<4°
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Spectral
Response
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Peak:
500-600nm; Mean 500-600nm
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SYSTEM
MEASUREMENT CHARACTERISTICS
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Response Time
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<10 seconds
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Calibration
Zero Operation
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On Command
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Upscale
Calibration Operation
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On Command
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Calibration
Error
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2.0% Opacity Maximum
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24 Hour Drift
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Zero/Upscale: <0.4% & 0.5% Opacity
Respectively
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Long Term (60
day) Drift
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Zero/Upscale: <0.4% & 0.5% Opacity
Respectively
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Voltage
Variation per ASTM D6216
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<1% Opacity over 85-265VAC
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Thermal
Stability per ASTM D6216
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<2% Opacity /every 40°F
over –25°
to 140°F
Range
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Ambient Light
Sensitivity per ASTM D6216
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<2% Opacity
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POWER
REQUIREMENTS
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Optical Head
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85-265VAC,
47-63Hz, Single Phase, 14VA
Fuse
Power
Supply Board: 1.25 Amp Time Delay, 250V, TR5
Power
Input Module: 5 Amp Fast Acting, 250V, 5x20mm
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Single Purge
Blower
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Dual Purge
Blower System
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Two Circuits (each same as above)
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Enhanced
Remote Panel
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85-265VAC,
47-63Hz, Single Phase, 25VA Max. Fuse
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AMBIENT
OPERATING CONDITIONS
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Optical Head
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-4°F
to +140°
(startup); -25°
to +140°F
(operating)
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Enhanced
Remote Panel
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+32°F to +104°F;
Rel. Humidity 0-95% Noncondensing
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MEASUREMENT
MEDIUM CONDITIONS
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Static
Pressure
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Single Blower: -10 to +5” of H2O; Dual Blowers:
-15 to +15” H2O
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Gas
Composition
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Not Critical
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Humidity
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Must be Non-condensing
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Maximum
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+500°F
without High Temperature
Option; +1500°F
with High Temperature Options
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OPTICAL
HEAD INTERFACE CHARACTERISTICS
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Display Type
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Six
7 Segment LED’s, Lexan Coating; EMI Protection
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Indicating
LED’s
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Fault,
Set, In-Cal, Power
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User Input
Controls
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10-key
keypad
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WIRING
REQUIREMENTS, OPTICAL HEAD TO ENHANCED REMOTE DISPLAY
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Network
Transceiver Type
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Free Topology Transceiver (FTT10A)
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Cable Type
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With Remote Display, 2 Conductor Unshielded Twisted
Pair, 16AWG (Belden 85102 or equivalent)
Without Remote Display, Min. 3 Twisted Pair/Max. 6
Twisted Pair
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Termination
Style
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Jumper Selectable Double Termination (Internal)
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Maximum
Distance to Remote Display
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7217 Feet (must be double terminated)
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Maximum Total
Network Length
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8858 Feet (must be double terminated)
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ENHANCED
REMOTE PANEL MAN/MACHINE CHARACTERISTICS
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Display Type
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Graphics mode liquid crystal with LED backlight
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Display
Resolution
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240 x 128
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Indicating
LED’s
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Fault, Alarm, Power
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User Input
Controls
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20-key keypad, security keyswitch
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ENHANCED
REMOTE PANEL SERIAL PORT CHARACTERISTICS
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Number
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2 (one RS232C, one RS422 or RS485 [jumper
configurable])
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Baud Rate
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9600
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Data Bits
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8
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Stop Bits
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2
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Parity Type
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No Parity
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Connector
Designation & Type
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J16, D89 and J17, DB15 for 422 or 485
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Operating Mode
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Polled Mode
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MULTI
I/O BOARD ANALOG OUTPUTS
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Number
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4
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Isolation Type
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Optical & capacitive barriers; channel to
channel, channel to circuit common & earth
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Minimum
Isolation Voltage
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500V peak, 500VDC
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Output Type
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4-20ma with live 4ma zero
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Maximum Load
Resistance
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900 ohms
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Maximum Offset
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+/- 0.05% of full scale
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Total Output
Error
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+/- 0.30% of full scale
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MULTI
I/O BOARD DIGITAL INPUTS
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Number
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8
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Modes
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Isolated and Non-isolated
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Isolated Mode
Minimum Isolation Voltage
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500V rms
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Isolated Mode
Minimum Actuation Voltage
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5VDC (user specified)
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Isolated Mode
Maximum Actuation Voltage
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24VDC (user specified)
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Isolated Mode
Maximum Input Current
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50ma @ 24VDC
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Non-isolated
Mode Actuation Condition
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Dry Contact Closure
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Non-isolated
Mode Internal Operating Voltage
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5VDC
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