Model 300 Single Gas Non-Dispersive
Infrared NDIR
Analyzer
The VIG Industries, Inc. Model 300 is designed to measure a single
gas (or two with oxygen option). The Model 300 optical bench consists
of the IR source, sample cell, and patent pending detector. The
source control circuit provides a controlled current square wave to
the infrared source. No mechanical chopper is used so there are no
moving parts in the Model 300 optical bench which require adjustment
or can wear out. Infrared energy from the source passes through the
sample where energy at specific wavelengths is absorbed by the
sample. The closed sample path eliminates interfering absorption from
ambient air. The energy not absorbed in the sample cell reaches the
detector which is sensitive to the wavelengths attenuated by the gas
of interest. The patent pending Model 300 detector consists of two
chambers in optical series with a very sensitive transducer to
measure the relative energy absorbed by each chamber. The primary
difference between the Model 300 detector and other NDIR detectors is
that these two signals from the primary and secondary chamber are
balanced. The balancing process greatly improves the sensitivity and
selectivity for the gas of interest.
The top line of the vacuum fluorescent display continually
monitors the concentration of the gas of interest in the selected
units, as well as the zero and span values during calibration. The
bottom line displays chart recorder range, linear or non-linear
mode, and response time. Any error or alarm condition will alternate
with this information until acknowledged by the operator. Operating
parameters are established by way of the four buttons on the Model
300 keyboard. The setup button is used to define settings such as
calibration gas concentration, sample cell flush time, automatic
calibration intervals, chart recorder ranges (1-4), and high and low
level alarms. The mode button is used to select active chart recorder
range, response time, linear and non-linear units, activate the
audible alarm, adjust display brightness, and initiate manual zero
and span calibrations. The arrow are used to make changes in values or
selection of desired parameters in the setup and mode functions. In
the event of a power failure, battery backup retains all
settings.
Applications
- Process control
- Stack gas monitoring
- Continuous emission monitoring
- Combustion efficiency
- Environmental gas analysis
- Heat treating
- Natural gas plants
- Utility plants
- Flue gas analysis
- Coke oven analysis
- Carburization Processes
- Monitoring of: boilers, incinerators, furnaces
- Vehicle Emissions
Features
- No range switching or over range conditions
- Digital signal permits microprocessor linearization for
increased accuracy
- Optional oxygen channel
- Optional
NEMA rated enclosures
- Measurement of one of the following selected gasses:
- Methane CH4
- Propane C3H8
- Carbon Monoxide CO
- Carbon Dioxide CO2
- Nitrogen Dioxide NO2
- Sulfur Dioxide SO2
- Nitrous Oxides NOX
Standard Specifications
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Analysis Method
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NDIR Single Beam
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Gas Measured
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User Selectable
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Measuring Range
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User Selectable
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Resolution
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0.1% of Full Scale
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Repeatability
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0.1% of Full Scale
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Noise
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0.1% of Full Scale
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Drift
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0.1% of Full Scale
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Response Time
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at 1, 10 or 100
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Display
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Vacuum Fluorescent, 2 Lines of 16 Alphanumeric
Characters
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Alarms
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High & Low Limit, User Selectable
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Analog Output
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Selectable 0-1, 5, 10Volts, Optional Isolated 4-20mA
Loop
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Analog Ranges
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4, Each With Adjustable Full Scale. Selectable Auto
Range
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Front Panel
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Four Button Interface, Using Display Menus
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Voltage
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0-1, 5, 10Volts, Selectable
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AC Output
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Isolated Triac Control for Zero & Upscale Gas
Values.
Rated Maximum Load: 0.6Amp, 240VAC
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Operating Requirements
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Power
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115/220Vac, 50/60Hz
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Power Consumption
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200Watts
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Sample Flow
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.2 to 2.0 Liters/Minute
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Sample Temperature
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-10 to +50 Degrees C.
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Dust
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Sample Should be Dust Free
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Moisture
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Non-Condensing
(Dew Point Below Outlet Temp. of
Analyzer)
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Pressure
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Inlet Gas not to Exceed 5PSIG
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Exhaust Gas
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Non-Restrictive Outlet Aperture/Hoses
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Zero Gas
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Typically Nitrogen
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Upscale Calibration Gas
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Gas of Interest in Nitrogen
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Warm Up Time
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Useable in 30 Minutes. Optimum Operation in 2 Hours
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Ambient Conditions
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Operating -10 to 50 Degrees C.
Storage -10 to 80 Degrees C.
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Dimensions
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22"L x 18"W x 5.25"H
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Weight
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22 LBS
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Warranty
All instruments sold by VIG Industries, Inc., are warranted for a
period of one (1) year from the date of purchase, against defects in
materials and workmanship. VIG warrants that the product supplied
conforms to the specifications assigned thereto. There is no other
warranty either implied or expressed. Seller liability is limited
specifically to the cost or assigned value of the items sold.
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