931D Style B Process Gas Chromatograph Product Specifications PSS 6-4N1 D ® The 931D Process Gas Chromatograph consists of both an analyzer and microprocessor-based controller. The analyzer (lower section) provides a controlled environment (air bath oven) for the sample, separation assembly, and detector. The controller (upper section), dedicated to the analyzer, performs all chromatographic operations from stream switching in the sample conditioning system through data processing and presentation. SEPARATION ASSEMBLY The separation assembly is designed to simplify both application and maintenance. The valves, columns, and flow controllers required to perform a desired separation are mounted on this assembly, which mounts inside the oven. This allows the assembly to be easily removed and replaced with a fully-checked alternate assembly, thereby minimizing downtime for new applications and for routine maintenance. CHOICE OF DETECTORS The Thermal Conductivity Detector (TCD) is used to measure percent level of components. The detector current is automatically disconnected upon loss of carrier gas to prevent filament damage. The new 931D Style B Process Gas Chromatograph continuously analyzes, measures and reports the concentration of components in process streams. This new generation analyzer can be seamlessly integrated into the I/A Series ® system. It provides data for process control and complete maintenance information including chromatograms, trend graphics, and remote analyzer configuation via the I/A Series Analyzer Management Software (AMS). The product conforms to applicable European Union Directives and is marked with the “CE” logo.
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931D Style B Process Gas Chromatograph
Product Specifications PSS 6-4N1 D
®
The new 931D Style B Process Gas Chromatograph continuously analyzes, measures and reports the concentration of components in process streams. This new generation analyzer can be seamlessly integrated into the I/A Series® system. It provides data for process control and complete maintenance information including chromatograms, trend graphics, and remote analyzer configuation via the I/A Series Analyzer Management Software (AMS). The product conforms to applicable European Union Directives and is marked with the “CE” logo.
The 931D Process Gas Chromatograph consists of both an analyzer and microprocessor-based controller. The analyzer (lower section) provides a controlled environment (air bath oven) for the sample, separation assembly, and detector. The controller (upper section), dedicated to the analyzer, performs all chromatographic operations from stream switching in the sample conditioning system through data processing and presentation.
SEPARATION ASSEMBLY
The separation assembly is designed to simplify both application and maintenance. The valves, columns,
and flow controllers required to perform a desired separation are mounted on this assembly, which mounts inside the oven. This allows the assembly to be easily removed and replaced with a fully-checked alternate assembly, thereby minimizing downtime for new applications and for routine maintenance.
CHOICE OF DETECTORS
The Thermal Conductivity Detector (TCD) is used to measure percent level of components. The detector current is automatically disconnected upon loss of carrier gas to prevent filament damage.
PSS 6-4N1 DPage 2
The Flame Ionization Detector (FID) is used for measuring ppm or ppb levels of hydrocarbons in the process stream. Automatic hydrogen shutoff occurs with loss of detector flame.
The Flame Photometric Detector (FPD) is used for measuring ppm or ppb levels of sulfur compounds. Automatic hydrogen shutoff occurs with loss of detector flame.
NONVOLATILE MEMORY
The microprocessor-based controller features nonvolatile memory, eliminating the need for such high maintenance items as battery back-up or magnetic storage devices. After power loss, the operating program parameters are automatically reloaded when power is restored. A battery backed-up clock protects against loss of real time and date.
SECURITY
The microprocessor and operator interface panel is dedicated to a single analyzer. This ensures that the loss of any one analyzer does not affect the performance of any other analyzer on the process. A software lock is available that prevents unauthorized tampering with analyzer operation. Calibration can be initiated at any time from the operator panel. It can
also be automatically programmed to occur at pre-timed intervals. A full set of system function alarms, warning alarms, and data alarms is available to monitor system integrity. Provision for monitoring sample conditioning system performance via digital inputs is also available.
OPERATION INTERFACE
The multifunction operator interface panel is a dedicated service panel providing a user-friendly, Window Oriented Interface (WOI) display for program editing. Dedicated function keys are available for fast maintenance functions. The 160 character display (4 lines of 40 characters per line) is equipped with “Help” displays to simplify operator learning. These messages are accessed via the multi-function keypad.
Advanced programming capability is available via an RS-232-C serial port and terminal using an object oriented Command Line Interface (CLI).
Also available is an I/A Series workstation for operator interface. The workstation provides a full range of displays, including data, alarms, diagnostics, status, and programming functions.
SYSTEM CONFIGURATION
The 931D Process Gas Chromatograph (PGC) is an intelligent analyzer that is capable of use with I/A Series system release 4.0 or later. The PGC can be connected directly to an I/A Series Fieldbus. It provides analysis data and status information for direct input to the control environment. Additionally, analyzer management and maintenance information can be communicated to higher level applications. This capability, combined with the optional AMS, allows direct programming of any analyzer on the network. It also provides for viewing chromatograms and trend graphs at an I/A Series console. The PGC requires the I/A Series system to have either: (1) a Control Processor 30 (CP30), 50 Series Application Processor (AP), and Workstation Processor (WP); or (2) a CP30 and an Application Workstation (AW).
The analyzer is also capable of operating as a single stand-alone unit. Direct interface to a CRT Terminal, Printer, or Personal Computer is available via the RS-232-C serial port. This port is used for advanced programming via the Command Line Interface (CLI) or for basic data, alarm or diagnostic reporting.
The standard 931D product contains the following features:
PROCESS GAS CHROMATOGRAPH
Analyzer Isothermal OvenThe Analyzer Oven includes the detector and separation assembly as determined by specific application requirements.
Controller and Service Panel• I/A Series Fieldbus Interface (Option)• RS-232-C Serial Port• Digital and Analog I/O• System and Data Alarms• On-line Diagnostics• Chromatogram Outputs (Analog and Digital)• Local and Remote Programming• EEPROM Program Backup• Clock with Battery Backup• 160-character LCD Display (Backlight Optional)• Software Security Lock• Advanced Analysis Algorithms• Fast 16-bit Processor• Open Object Oriented Programming
PSS 6-4N1 DPage 3
DIGITAL INPUTSSixteen digital inputs for monitoring the analyzer or sample conditioning functions are provided as standard. Inputs are sensed by contact closure to common ground. Internal +5 V dc pull-up through 10K ohms is used. The inputs are assigned as follows:
1. Low carrier gas pressure2. Low instrument air pressure3. Low sample system pressure4. Detector failure5. Low calibration gas pressure6. Low hydrogen fuel gas pressure (FID only)7. Low zero air (FID only)8. Low oven air pressure9 through 16. Spare (user-assignable)
DIGITAL OUTPUTSDigital outputs for reporting data or system alarms are optionally available. Up to thirty-two solid state or voltage-free contacts can be specified. Solid state relays are normally open and rated at 3 A at 240 V ac. Voltage-free relays are normally open and rated at 0.5 A at 50 V ac or dc, noninductive, 12 VA maximum.
ANALOG INPUTSTwo non-isolated analog input channels are available for reporting data from external analyzers or measurement devices. The instrument can accept 0 to 10 V dc signal range. The data values are integrated into the system data report format.
ANALOG OUTPUTS (TRENDS)Up to twenty-four (24) analog outputs are optionally available. These trend outputs are used to report concentration data from any assigned stream and measured component (peak). Each output is an isolated 4 to 20 mA signal proportional to the measured range, updated at the end of the measured cycle.
PRINTER, CRT TERMINAL AND PC INTERFACERemote programming and data reporting are accomplished via ASCII, full-duplex, RS-232-C serial port and are intended for communication to a local or remote printer, CRT terminal/printer, or PC. The serial port can be configured as a 20 mA current loop for communications over distances greater than 15 m (50 ft).
I/A Series INTERFACEWith I/A Series release 4.0 or later, a Fieldbus Interface is optionally available for communication with the I/A Series CP30. The Fieldbus can have either single or redundant configuration. Each 931D Process Gas Chromatograph (PGC) occupies one device on the Fieldbus.
The CP30 is capable of addressing up to 64 devices. The actual number of devices that can be supported is application-dependent. Refer to PSS 21S-4Q1 B3 (CP Sizing Spreadsheet) and PSS 21H-1B2 B4 (Control Processor 30) for details.
MEASUREMENT INTEGRATIONThe 931D is fully integrated into an I/A Series system (release 4.0 or later) via a CP30. AMS functions are available and require a 50 Series AP and WP (or an AW). The 931D provides analysis data to the CP via the Fieldbus. Each analyzer requires one primary block in the CP. The primary block supports 12 data values and a corresponding 8-bit status word for each value. In addition, a 32-bit word is available for reporting alarm conditions. A secondary block provides for an additional 12 data values and 32-bit word. As many secondary blocks as needed can be used to satisfy data requirements. In addition to data transmission from the PGC, provision for transmitting up to six real data values to the analyzer is allowed. For example, data that are to be used in calculations can be sent from one PGC to another on the network.
PSS 6-4N1 DPage 4
STANDARD SPECIFICATIONS
Gas RequirementsOPERATING AIR
Dry and oil-free air at 345 kPa (50 psi) minimum and 3.4 to 5.1 m3/h (2 to 3 ft3/min) at standard conditions. Maximum supply pressure is 690 kPa (100 psi).
ZERO HYDROGENHydrocarbon-free, dry hydrogen at 40 cm3/min (2.4 in3/min) required for FID. Maximum supply pressure is 414 kPa (60 psi).
ZERO AIRHydrocarbon-free, dry air at 300 cm3/min (0.64 ft3/h) required for FID. Maximum supply pressure is 414 kPa (60 psi).
CARRIER GASPer application (e.g., He, N2, H2). Chromatograph grade required. Maximum supply pressure is 414 kPa (60 psi).
System Repeatability±1% of upper-range value, typical. Refer to Foxboro for specific application.
Output RangeEither in ppm or percentage, depending on application
Ambient Temperature Limits
-15 and +50°C (5 and 122°F)
Relative Humidity Limits0 and 95%, noncondensing
Power Requirements120 V ac, ±10%, 50/60 Hz, or220 V ac, ±10%, 50/60 Hz, or240 V ac, ±10%, 50/60 Hz,
Power Consumption1100 VA
Inside Dimensions of Oven (W X H X D)457 x 356 X 254 mm (18 X 14 X 10 in)
Inside Oven Wall MaterialAISI Type 316 stainless steel (316 ss)
Valve MaterialNitronic-60
Approximate Mass118 kg (260 lb)
ELECTRICAL SAFETY SPECIFICATIONS
STANDARD SYSTEM HARDWARE, DIAGNOSTICS, AND SOFTWARE
The standard system incorporates a 16-bit processor and object oriented programming platform. The front panel display provides a convenient WOI for quick program editing in real time. Nonvolatile memory (EEPROMs) ensures program backup in case of power failure. Advanced programming is available to the user through the CLI. An RS-232-C serial port is
provided for communication to an external terminal with printer. The standard serial port supports a CRT terminal, a serial printer, or a PC in terminal mode. It also supports a modem for remote data reporting, diagnostics, or programming. When the serial port is connected to a PC, application programs or data reports can be saved on a diskette.
Testing Laboratory, Types ofProtection, and Area Classification Application Conditions
Electrical Safety
Design Code
KEMA certified explosion-protected with approved pressurization EExp for IIB + H2, Zone 1. It is also accepted for use in all other EEC member countries.
Pressurization alarm contact to intrinsically safe associated equipment, certified for IIC. Temperature Code T3.
ESZ
FM certified explosion-protected when Type Y purged for Class I, Groups B, C, and D, Division 1.
Temperature Code T3. FSZ
PSS 6-4N1 DPage 5
DIAGNOSTICSThe following on-line diagnostics are available for fault reporting:
• Hardware:– Low instrument air pressure– Low carrier gas pressure– Low hydrogen fuel gas pressure (FID only)– Low zero air (FID only)– Low purge air pressure
• Software:– EEPROM test– PROM test– RAM test– Watchdog timer– Two high and two low data alarms– Calibration tolerance alarm– Peak simulator, user programmable, for use in
testing entire controller and communications functions
– Reconstructed chromatogram. Real-time chromatogram available with event markers on or off. Total chromatogram of previous cycle as well as stored chromatogram on alarm is available to the I/A Series AMS.
SYSTEM HARDWAREStandard system hardware includes the following:
• Service panel and display located on the upper enclosure door used for local data display diagnostics and program editing. The following features are provided:– 160-character alphanumeric LCD display– Large easy to read tactile multi-function
keyboard– Maintenance display– Diagnostics and Alarm displays– Data display– Status display– Set-up display using WOI
• Internal service panel provides the following:– Service jack for chromatogram recording (0 to
10 mV).
NOTEThe chromatogram is also available as 0 to 10 V from internal terminals or can be optionally assigned to a 4 to 20 mA trend channel.
– RS-232-C service jack for connection to local maintenance terminal, printer, or PC.
– Detector offset control– TCD current and Auto Zero on/off switches
• Analyzer Oven, consisting of the following:– Temperature controlled isothermal oven
– Separation assembly with columns, valves, flow restrictors and mounting bracket
– Detector– High temperature cutout switch and instrument
oven air pressure switch to protect against heater damage due to low air flow.
– Oven temperature control set point adjustable from front panel.
SYSTEM SOFTWARE• Key analysis and programming functions:
– Peak identification by forced, slope or tangent skim detection methods
– Chromatogram Analysis Report for full identification of all peaks and event markers
– Unlimited number of components analyzed and reported
– Advanced analysis techniques for precision analysis and calibration results
– Peak processing by selected peak height or area integration
– Continuous integration with zero deadtime between programmed events
– Programmed Auto-Zero for automatic baseline correction
– Peak drift limits, monitors peak elution times– Control of up to six analyzer valves with un-
restricted number of times– Display peak names, value, engineering units
and status– Complete system status and alarm display– Calibration on demand or programmable
automatic calibration– Programmable alarm contact assignments– Oven temperature control set point via front panel– Programmable trend assignments– Automatic start-up sequence for column purge– Failsafe valve positions for column protection in
power off condition– Programmable chromatogram attenuation and
offset as a function of cycle time– Programmable Stream sequence of up to 32
Analog Outputs 4 to 20 mA, IsolatedA = No Analog OutputsC = 8 Trend OutputsE = 16 Trend OutputsG = 24 Trend Outputs
Electrical Certification(a)ESZ= KEMA certified (For use with detector selections E, F, and G.)FSZ= FM certifiedZZZ= No Approval/Certification Required (For use with FPD detector.)
The application package, consisting of the Separation Assembly, Application Engineering, Design, and Checkout, must be quoted on a per application basis. Refer to Foxboro Analytical for information and price quotation.
OPTIONAL FEATURES
Optional Feature Description AS Reference(1)
Analyzer Management Software
Used with I/A Series system release 4.0. Allows configuration and management of analog functions via the I/A Series system. Refer to PSS 21S-4U1 B3 for details.
Refer to PSS 21S-4U1 B3
CRT Terminal Provides CRT display for advanced programming using the CLI. Also can be used for display of data reports and/or diagnostics report. The CRT terminal provides a serial port for connecting a serial printer for hard copy.
CRT
Printer Serial printer for direct connection to the CRT terminal. PTR
Trend Recorder Used for graphic presentation of peak concentrations and for reconstructed chromatogram. Externally powered trend recorder is connected to 4 to 20 mA trend output on 931D.
REC
Come Read Relay Used when PGC is to provide information to host. Relay is activated upon completion of PGC analysis cycle. Host is signaled to read analysis data from PGC during defined time interval.
CRR
Clean Air Set (FID Only) Provides hydrocarbon-free instrument air as required by FID. Eliminates need for bottled hydrocarbon-free instrument air.
CAS
Methanator (FID Only) Converts CO and CO2 to methane, thereby allowing detection and measurement by FID.
METH
(1) When ordering an option, add Auxiliary Specification (AS) Reference to Model Number.Example: 931D-1B2G2C1-1, AS Reference PTR.
(2) For safety considerations, the watchdog timer and alarm relays (refer to Alarm Relays Code) must be connected when measuring hazardous components.
PSS 6-4N1 DPage 8
(DIMENSIONS–NOMINAL)
106742.0
102240.3
99139.0
58423.0
55922.0
50820.0
110.44
DIA. HOLES(4 PLACES)
38515.3 35
1.4
55021.7
602.4
31012.2
62024.4
1455.7
602.4
77030.3 4.0
0.16
92136.3
mmin
The Foxboro Company33 Commercial StreetFoxboro, MA 02035-2099http://www.foxboro.comUnited States of AmericaInside U.S.:1-888-FOXBORO
(1-888-369-2676)Outside U.S.: Contact your local Foxboro Representative.Facsimile (508) 549-4992
A Siebe Group Company
Foxboro and I/A Series are registered trademarks of The Foxboro Company.Siebe is a registered trademark of Siebe, plc.
Copyright 1994-1998 by The Foxboro CompanyAll rights reserved
