Model 301-FID
The CAI Total Hydrocarbon Analyzer Model 301 FID is designed to
continuously measure the total concentration of hydrocarbons within a
gaseous sample. The gaseous sample can be ambient air, exhaust gases
from an internal combustion engine, or exhaust gases from a combustion
process.
METHOD OF OPERATION
The Model 301 FID uses the Flame Ionization Detection (FID) method to
determine the total hydrocarbon concentration within a gaseous sample.
The analyzer contains a burner in which a small flame is elevated and
sustained by regulated flows of air and either pure hydrogen or a 40/60
mixture of hydrogen and helium or hydrogen and nitrogen. The burner jet
is used as an electrode and is connected to the negative side of a
precision power supply. An additional electrode, known as the
“collector,” is connected to a high impedance, low
noise electronic
amplifier. When a gaseous sample is introduced to the burner, it is
ionized in the flame and the electrostatic field causes the charged
particles (ions) to migrate to their respective electrodes. The
migration creates a small current between the electrodes. This current
is measured by the precision electro- meter amplifier and is directly
proportional to the hydrocarbon
concentration of the sample.
SPECIFICATIONS
ANALYSIS METHOD: Flame Ionization Detector (FID)
MULTIPLE RANGE CAPABILITY:8 operations ranges - 10, 30, 100, 300, 1000,
3000, 10,000, 30,000 ppm carbon
RESOLUTION: 0.01 ppm Carbon (lowest range)
REPEATABILITY: Better than ± 0.5% of full scale
LINEARITY: Better than 1% of full scale
O2 EFFECT: Less than 2% of full scale
CH4 EFFECT: Less than 1.3 times propane
RESPONSE TIME: 90% of full scale in 1.5 seconds
SAMPLE FLOW REQUIREMENT: 4.0 liter/min. ±1.5 liter/min.
NOISE: Less than ± 0.5% of full scale
ZERO & SPAN DRIFT: Less than 1% of full scale per 24 hours
FLOW CONTROL: Electronic Proportional Pressure Controller
FUEL REQUIREMENTS: 40% H2/60% He (100cc/min.) or 100% H2 (30cc/min.)
(specify at time of order) Fuel inlet pressure 25 psig
READOUT: As ppm CH4 or C3H8
(specify at time of order)
AIR REQUIREMENTS: Less than 1 ppm Carbon Purified or synthetic air
(200cc/min.) Air Inlet Pressure 25psig
DISPLAY: 31/2 Digit Panel Meter
DIAGNOSTICS:
3-1/2 Digital Meter with 7 Position Switch, Collector Voltage 15 VDC,
Fuel Pressure, Burner Temperature, Air Pressure, Catalyst Temperature,
Sample Pressure
ANALOG OUTPUT: 0-10 VDC & 4-20 mA DC/0-20 mA DC
FUEL/AIR CONTROL: Forward Pressure Regulator
IGNITION: Momentary push-button with Flame-On Indicator (manual or
remote control)
FLAME OUT INDICATOR: With automatic fuel shut-off and dry contacts at
rear panel
AMBIENT TEMPERATURE: 5-45°C
SAMPLE TEMPERATURE RANGE: 0-50°C
WARM-UP TIME: 1 hour
FITTINGS: 1/4” tube
POWER REQUIREMENTS: 115/230 (±10%) VAC @ 50/60 Hz, 40 watts
DIMENSIONS: 5-1/4”H x 19” W x 23” D
(133mm x 483mm x 508mm)
RELATIVE HUMIDITY: Less than 90% RH non-condensing
WEIGHT: 28 lbs. (12.3 kg)
Specifications subject to change without notice.
FEATURES
- CE Approved
- Made in USA
- Sensitivity 0.1 ppm
- Automatic ignite capability – local or remote
- Automatic fuel/air shut off
- Complete digital presentation including
sample/fuel/air pressures (no gauges)
- Electronic proportional pressure sample controller
- Multiple range capability
- Optional continuous methane only
- Digital diagnostics
- 19” rack mount (only 5-1/4” high)
APPLICATIONS
- Stack gases (CEM)
- Scrubber efficiency
- Process chemical gas analysis
- Personnel safety
- Solvent recovery
- Vehicle emissions
- Fenceline (perimeter) monitoring
- Non-methane hydrocarbon measurements
METHANE ONLY OPTION
The Methane Only Option provides the capability for measuring METHANE
ONLY
or TOTAL HYDROCARBONS. The choice is switch selectable from the front
panel or by remote contact closure. Additional hardware includes a
heated catalyst assembly and a three-way valve. Conversion efficiency
is greater than 98% for propane and above. (This option requires the
use of 40/60% H2/He fuel and a readout as ppm CH4).
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