Model 301 C Process Gas Chromatograph

Process Gas Chromatographs
For Process and Environmental Monitoring

Ambient Air, Chemical & Petrochemical Industry, Hospitals, Medical
Device Manufacturers, Stacks, Laboratories, Remediation Sites
Specific VOCs in water
Model 301C 19 Rackmount
Model 301C Wallmount
Fenceline, Process, Stacks, Area Monitoring, Effluents
301C PROCESS GAS CHROMATOGRAPH
Hydroarbons, VOCs, benzene, 1,3 BD, VC, ETO, H2, CO, CO2, fixed
gases, O2, H2S, Dimethyl sulfate, DMS, Methylene chloride, Freons...
PROCESS GCs
Introduction
The Model 301-C PGCs are flexible
and versatile Analyzers that are in their fourth

generation. These Models are, by far, the
most powerful and versatile (with their
embedded Pentium PCs) developed by us
since 1985.
The addition of these new Analyzers greatly
improves the capability and range of Process
Analyzers from PID.
PID-Description
The process of photoionization is initiated by
the absorp-tion of a photon of ultraviolet
radiation energetic enough to ionize a
molecule (RH) by the process shown below:
RH + h RH+ + ewhere h represents a photon with an energy
the ionization potential of species RH. The
ions are collected in an ionization chamber
which is adjacent to the lamp and contains an
accelerat-ing electrode (biased positively) and
a collection electrode where the current is
measured. After amplification, the current
measured is proportional to concentration. The
response measured will be a summation (total)
of the hydrocarbons ionized.
FID Description
In the FID, the sample is burned in a hydrogenair flame and the ions formed from carbon
containing compounds are collected by
applying a positive potential to the jet and
measuring the current at collection electrode
just above the flame. After amplification, the
current measured is proportional to
concentration. The response measured will be
a summation (total) of the hydrocarbons
ionized.
TCD Description
Measures difference between the thermal
transfer characteristics of the sample gas and
a reference gas, generally helium. The sample
and reference filaments are two legs of a
Wheatstone Bridge. A constant current is
applied with a resultant in a rise in filament

temperature. As the sample passes through
the detector, the resistance changes as the
reference gas is replaced by the sample
which has a lower thermal conductivity. The
resistance is proportional to the concentration.
Applications: PID, FID, ECD, TCD,

FPD
Monitoring effluents from chemical
pharmaceutical manufacturing,
carbon beds (Gasoline, Cl HC)
Leak detection- from process
equipment
Stack & Vent monitoring
Drying ovens for removing solvents
ncineration
BTX, VC, ETO, freons, solvents in
ambient, waste sitec or plant
atmospheres
Remediation site monitoring
Oil and gas exploration
Sulfur cpds in air or stacks
Odorants in natural gas
Natural gas composition
VOCs in water with optional
Sparging system (Model 650)
FeaturesEmbedded Pentium Computer with color VGA

display ,Microsoft Windows XP
Professional
&
PeakWorks
Chromatography Software
Wide Range of Universal to Specific
Detectors Universal: TCD, FUV; Selective:
PID, FID, Specific: FPD (S or P), ECD
Automatic Restart- In the event of a power
outage
Automatic calibration; automatically adjusts
response on timed frequency;
Autozero each run
Wide operating range- 16 Bit ADC with 3
decades of autoranging
Compact 19 Rack- NEMA 2 enclosure (301C
only) & Wall Mount NEMA 4 enclosure
PID- lamp out alarm; FID/FPD-flame out- shuts
off hydrogen and provides alarm, TCD
carrier out
RS232 digital output; 0-1 VDC analog output
Data storage on 40 GByte hard drive
Output Signals- RS232, RS485, MODBUS...
Hydroarbons, VOCs, methane, amines, NH3, PH3, AsH3, C2H4, Freons,

SO2, C2H2, WMDs, Nerve gases, Transformer gases, Natural Gas...
PROCESS GCs
Specifications
Detectors available: PID , TCD,
FID, FUV, ECD, FPD (S, P)
Measurement mode: Continuous
Zero drift- Automatic Zero
compensation; <1% per month
Span drift- Auto cal each 24 hours
(remotely with contact closure):
less than 1% every 24 hours
Wide range of response- from sub
ppm on PID to % on the FID or TCD
Support gases:FID & FPD require
H2 and zero air
Readout- Color VGA display
Standard output: 1 VDC, RS232
Enclosures:Rack (NEMA 2)
19" W x 11"H x 17"D
Weight: 32 pounds
Wall (NEMA 4)- 301C
23"W x 30"H x 17"D
Options
Gas or liquid sampling systems
4-20 mA output; RS485 output,
10/100 network card,
See Table I
Data acquisition and storage using
PeakWorks C- runs under
Windows or Windows NT on a
Remote Pentium PC
2, 4-6, 8-12 point sequencers for 301C; 16-20,20+ point sequencers
-(with contact closure to indicate point
being
sampled,
Display
of
Concentration, Sampling Point & Sample
Flow (measured by flowmeter)
Mass flow sensor for column flow optional for 301 C
Applications Engineering:Dual columns,
column switching valves, concentrator
X or Z purged for Zone 1 and Zone 2
respectively- requires NEMA enclosure
Weight: 80 pounds-301C
Sampling Systems
Weight: 140 pounds (2 x NEMA
A variety of sampling systems are available

for the 301C including the
following:
Removal of particulate
Removal of water
Electrically heated sampling lines
Steam traced sampling lines
Heat exchangers for hot samples
A typical sampling system is shown below:
4 enclosures)Power requirements- 100-240VAC,

1.5 /0.75 amp
Detector Range/Species
PID range - ppb-ppm; ppm- %; sub ppb with
optional concentrator
hyrdocarbons > C4 plus, VOCs, inorganic
species such as H2S, NH3, I2, PH3, AsH3, etc.
FID Range- 1- 200,000 ppm
measures hydrocarbons only
TCD Range- ppm to 100%-Fixed gases, H2,
inorganic gases & hydrocarbons
FPD Range- ppb-ppm- S cpds; P cpds ppbppm
FUV Range- ppb to %- Organic & inorganic
cpds, Fixed gases
Comparison of Model 301C Process GC

& Typical Installations
Table I
Comparison of Model 301C Process GCs
Model 301 C
Enclosures
19 Rack
NEMA 4
Separate enclosure for GC
foven
Second oven
Purged enclosures (X orZ)
No
Optional
Multipoint Sequences
2, 4-6, 8-12, 16-24
Sampling point programming

Programmable Equilibrate
Additional valve relay
Sample ahead
Mass flowmeter-sample
Mass flowmeter- carrier
Optional
Optional
Optional
Optional
Optioal
Optioal
Pentium PC
VGA Display
Operating System
Yes
Yes
Windows XP embedded
Chromatography Data
PeakWorks
PeakWorks C SW
MODBUS
RS232
0-1 VDC
4-20 mA
Option
Option
Included
Included
Optional per point/per component
Yes
Yes optional
No optional
Definitions
MODBUS- communications protocol that allows
extrnal PC or PLC to request data
PeakWorks- Windows based chromatography
data & analyzer control software
PeakWorks C-Communications software run on
a remote PC (through the RS232 port) that displays and stores data remotely
Sample ahead-sampling for the next point
starts as son as sample is injected- faster sampling times
Sample point programming-Instead of
sample points being 1,2,3... they can be customer programme to 1,1,5,9,1...
Additioonal valve relay- more complex analyses can be run
301C installed at a natural gas odorant

facility for measuring THT & TBM on-line.
Model 301C (Above) mounted downstream

of a waste incinerator measuring H2S &
CH3SH at ppb levels via PID.
Sampling system for moisture removal and

measurement of S cpds at ppb levels.
Model 301 C (above) in instrumentation
housing at a Chlorine plant measuring H2,
O2, N2 & CO2. TCD with hastelloy valves &
fittings.The Analyzer and oven (lower
enclosure) are purged to keep corrosive
atmosphere from Analyzer.
Sampling system for wet chlorine (above) has

teflon valves and multipoint. sampling system
is heated to prevent condensation. The
sampling system valves are controlled by air
actuated valves in the 301C.
Explosion proof (Z purge) 301C (above) with

external air activated multi (5) point system
with moisture removal.
PeakWorksTM Software/Multipoint Sequencer
PeakWorksTM
Multipoint Sequencer
PeakWorks TM is PIDs Windows based

chromatography software that can be used to
control the GC parameters, integrate & display the
chromatograms and store the data for the GC 301B.
The software is written in C++ as an overlay/interface
for the Windows operating system. Low and high
alarm levels and concentration range can be set in
the PC. A 24 hour graph of each point can be
displayed on the VGA color screen. Each day at
midnight, a new file is created and named (by date).
These files can be directly imported into EXCEL
and plotted. A copy of the screen for 3 ppb of
benzene is shown in the Figure below.
PeakWorks has multipoint calibration capabilities

and response factors that can be calculated
automatically or entered manually. Windows are
adjustable for each compound. Two levels of alarm
can be set for each compound. The system can
be run & operated remotely via a PLC.
The 301-C has several multipoint

options The first is a simple 2 point system
that can be used to monitor the input and
output of a scrubber, catalytic oxidizer, carbon bed etc. to determine the efficiency of
the system. The 301-C will display
the data and chromatograms on the screen.
The second option is a 4-6, or 8-12 point
system (301-BC or up to 20+ points.
This system employs a manifold
with a needle valve and a 3 way valve for
each channel. The flow for each channel is
measured with a flow meter and is
displayed the meter. The setpoint
for the flow channel can be set to indicate a
low flow or blockage for a particular channel. The optput for the mass flow sensor
can be sent to a PLC via a 4-20 mA output
to log the flow values for dignostic purposes. The channel number and sample
flow are displayed in the lower right margin
of the display. Two levels of alarm can be
programmed for each channel in the system. This system provides an inexpensive
alternative to a sensor for each point. The
cost of maintaining and/or calibrating this
single system is considerably less expensive than maintaining a 8 or 12 individual
sensor system.
The 301-C multipoint systems can
be easily interfaced with a PLC or DCS
system that is already at the Plant. The GCs
can also be hooked into an intranet in the
plant. Contact PID for information.
PID ANALYZERS, LLC

:DVKLQJWRQ&LUFOH 6DQGZLFK, MA 02
Tel. 1-7 USA Fax. 1-7 Web: http://www.hnu.com E-mail: sales@hnu.com
HNU Nordion, Ltd, OY, Atomitie 5 %, PL 1, Helsinki, Finland Tel. + Fax +
Web: http://www.hnunordion.fi E-mail: Info@hnunordion.fi

Model 301 C Process Gas Chromatograph

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Model 301 C Process Gas Chromatograph

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Copyright:

Available Formats

Process Gas Chromatographs

For Process and Environmental Monitoring

Model 301C 19 Rackmount

Model 301C Wallmount

Fenceline, Process, Stacks, Area Monitoring, Effluents

301C PROCESS GAS CHROMATOGRAPH

and versatile Analyzers that are in their fourth

applied with a resultant in a rise in filament

Applications: PID, FID, ECD, TCD,

FeaturesEmbedded Pentium Computer with color VGA

Hydroarbons, VOCs, methane, amines, NH3, PH3, AsH3, C2H4, Freons,

Weight: 140 pounds (2 x NEMA

A variety of sampling systems are available

4 enclosures)Power requirements- 100-240VAC,

Comparison of Model 301C Process GC

2, 4-6, 8-12, 16-24

Sampling point programming

301C installed at a natural gas odorant

Model 301C (Above) mounted downstream

Sampling system for moisture removal and

Sampling system for wet chlorine (above) has

Explosion proof (Z purge) 301C (above) with

PeakWorksTM Software/Multipoint Sequencer

PeakWorks TM is PIDs Windows based

PeakWorks has multipoint calibration capabilities

The 301-C has several multipoint

PID ANALYZERS, LLC

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