872147_AA140-240-280_Specifications.pdf

 Varian AA140/240/280 Atomic Absorption Spectrometers Specifications

 Varian AA140/240/280 Atomic Absorption Spectrometers

Specifications

Flame AA instrument versions AA140/240

External PC-controlled Atomic Absorption spectrometer fitted with 4 lamp positions and choice of manual or automatic lamp selection. AA240 is true double-beam and AA140 is single-beam. Supplied with SpectrAA Base software.

AA240 FS

Fully automated PC-controlled true double-beam Atomic Absorption spectrometer with Fast Sequential operation for fast multi-element flame AA determinations. Features 4 lamp positions and automatic lamp selection. Supplied with SpectrAA Base and PRO software versions.

AA280 FS

High performance PC-controlled true double-beam Atomic Absorption spectrometer with Fast Sequential operation for fast multi-element flame AA determinations. Features 8 lamp positions with 4 supporting UltrAA lamp operation (requires optional external control module), automatic lamp selection, automated burner adjuster and factory-installed SIPS supply (simply plug in SIPS pump module for SIPS capabilities). Supplied with SpectrAA Base and PRO software versions. The AA140/240/280 series flame AA instruments are suitable for manual flame analyses, and vapor generation using the VGA-77 Vapor Generation Accessory. They feature: • Automatic wavelength and slit selection • Wide-range photomultiplier tube • Choice of burner type (air/acetylene or nitrous oxide/acetylene) • Universal Mark 7 flame atomization system • Deuterium background correction • Automated flame analyses and graphite furnace analyses possible with additional accessories • Factory-installed UltrAA lamp looming optional (standard on AA280 FS) • PCI-IEEE interface card supplied

Graphite Furnace AA instrument version AA240 G

Fully automated PC-controlled true double-beam Atomic Absorption spectrometer dedicated to graphite furnace AA determinations with the GTA120 Graphite Tube Atomizer and PSD120 Programmable Sample Dispenser. Features 4 lamp positions supporting UltrAA lamp operation (requires optional external control module), automated lamp selection, automatic wavelength and slit selection, deuterium background correction and a wide range photomultiplier tube. PCI-IEEE interface card supplied. Supplied with SpectrAA Base software.

Zeeman AA instrument versions AA240 Zeeman

External PC-controlled Atomic Absorption spectrometer dedicated to Zeeman graphite furnace AA determinations using the GTA120 Graphite Tube Atomizer and PSD120 Programmable Sample Dispenser. Features 4 lamp positions supporting UltrAA lamp operation (requires optional control module – either external or factory fitted integrated supply) with automated lamp selection and a wide range, high sensitivity (R955) photomultiplier tube. Supplied with SpectrAA Base software.

AA280 Zeeman

High performance external PC-controlled Atomic Absorption spectrometer dedicated to Zeeman graphite furnace AA determinations using the GTA120 Graphite Tube Atomizer and PSD120 Programmable Sample Dispenser. Features 8 lamp positions with automated lamp selection, integral UltrAA lamp supply supporting operation of 2 UltrAA lamps plus support for an additional 2 UltrAA lamps using an external control module (optional) and choice of photomultiplier tube (wide range, high sensitivity R955 or ultra high sensitivity, short range R4332). Supplied with SpectrAA Base and PRO software versions. The AA240/280 Zeeman series instruments are suitable for graphite furnace determinations using Zeeman background correction, and vapor generation using the VGA-77 Vapor Generation Accessory (requires the  VGA for Zeeman adaptor and the ETC-60 Electrothermal Temperature Controller for atomization). They feature: • Automatic wavelength and slit selection • Zeeman background correction • PCI-IEEE interface card supplied Power and gas connections kits supplied upon nomination of country of final destination in all cases.

 Varian AA140/240/280 Atomic Absorption Spectrometers

Specifications

Flame AA Hardware Feature

AA140/240

AA240 FS

AA280 FS

Optics:

Narrow beam optics match flame and furnace profiles. Fully sealed optics feature quartz-overcoated mirrors for enhanced protection. The AA240/240 FS/280 FS feature a Rotating Beam Combiner, which alternately passes the sample or reference beam into the monochromator for maximum light transmission.

Wavelength range:

185-900 nm

185-900 nm

185-900 nm

Optical bench:

Optics mounted on a reinforced flat plate with a fitted deep-drawn cover for protection from dust and vapor.

Monochromator:

Automated self-calibrating Czerny-Turner monochromator with microstepping driver for enhanced resolution. PC-controlled wavelength selection and peaking.

Focal length:

250 mm

250 mm

330 mm

Wavelength repeatability:

± 0.04 nm

± 0.04 nm

± 0.035 nm

Wavelength slew rate:

2000 nm/min.

2000 nm/min.

2025 nm/min

Grating:

Holographic diffraction grating with 1200 lines/mm blazed at 240 nm.

Holographic diffraction grating with 1800 lines/mm blazed at 240 nm.

Dispersion 3.1-2.3 nm/mm

Dispersion 1.6-0.8 nm/mm

Detector:

Selected wide range photomultiplier tube for maximum signal to noise performance type R446 type R955 type R955.

Slits:

Automated slit selection. Settings: 0.2, 0.5 and 1.0 nm plus reduced height 0.5 nm slit for graphite furnace operation

Automated slit selection Settings: 0.1, 0.2, 0.5 and 1.0 nm plus reduced height 0.5 nm slit for graphite furnace operation.

Lamp support:

4 lamps mounted in fixed positions Fast lamp selection using mirror. Manual or automatic operation (automated lamp selection standard on AA240 FS).

8 lamps mounted in fixed positions. Fast lamp selection using an automated mirror.

All lamps operated simultaneously in Fast Sequential mode Accommodates single or multi-element, coded or uncoded lamps. Compatible with high-intensity UltrAA lamps. Lamps secured by the base without restraining clips or power cables. Lamps automatically switched off at the end of analysis. Users can elect to leave the lamp on at the end of an autorun. Automated pre-warming of next lamp in sequence. Optional UltrAA lamp looming available

Factory-installed UltrAA lamp looming supports up to 4 high intensity UltrAA lamps Requires optional external control module.

Background corrector:

High-intensity deuterium background corrector covering wavelength range 185-425 nm. Corrects up to 2.5 background absorbance. 2 ms response. Electronic modulation with automatic gain attenuation for improved beam balance. Deuterium lamp easily aligned and replaced by the user.

Internal air purge:

Barb fitting provided on rear of spectrometer module to enable connection to a supply of clean, dry air. This enables internal purging of the instrument to maintain a positive flow of clean air through the instrument. This excludes dust and corrosive vapors, enhancing corrosion protection in rigorous conditions.

FS operation:

Optional

Supports Fast Sequential operation, enabling multiple elements to be measured in rapid sequence in a single sample measurement, without the need to re-analyze the samples for subsequent elements. Requires PRO software (optional on AA240).

Gas control:

Automatic or programmable.

Hammer programmable gas control standard.

Automatic gas control – preset oxidant flow and variable fuel flow adjusted using manual flow meter adjustments. Automatic oxidant change-over. Hammer programmable gas control – PC-controlled gas flows with automatic setting of gas flows for each element. Automatic oxidant changeover. Features unique fast response Hammer solenoid valve for rapid regulation and setting of selected gas flow.

 Varian AA140/240/280 Atomic Absorption Spectrometers

Specifications

Flame AA Hardware continued Feature

AA140/240

AA240 FS

AA280 FS

Flame safety system:

Separate ignite and flame-off buttons. Eight safety interlocks monitor burner type, burner correctly fitted, liquid trap, pressure relief bung, flame shield, flame operation, mains power, oxidant safety reservoir and deuterium lamp cover. Internal gas connections made automatically without external gas hoses. Separate upper and lower flame shields and a chimney protect against heat and UV radiation from the flame. External adjustment of all burner and spray chamber controls. Violation of any safety interlock either inhibits flame ignition or extinguishes existing flame.

Burner adjuster:

Manual adjustment of burner height

PC-controlled burner adjuster with automatic setting of burner height for each element. Burner height automatically adjusted to the optimum setting when switching between elements in Fast Sequential mode.

Flame atomization:

Universal Mark 7 atomization system supplied as standard.

Spray chamber:

Fluorinated high density polyethylene Mark 7 design suitable for aqueous and organic solutions.

Mixing paddles:

Removable twin-headed mixing paddles fitted inside the spray chamber for better mixing and extended operation with high dissolved solids solutions.

Impact bead:

Externally adjustable glass impact bead for optimum sensitivity and best precision. Optional Teflon bead for HF applications.

Nebulizer:

Adjustable nebulizer with inert platinum/iridium capillary and PEEK venturi for corrosion resistance.

Liquid trap:

Integral liquid trap with magnetic float interlock.

Burner:

Incoloy air/acetylene burner with Teflon corrosion shield. Provides external burner rotation. Optional nitrous-oxide/acetylene burner.

Typical performance:

Absorbance > 0.9 with precision of < 0.5 % RSD from ten 5 second integrations for 5 mg/L Cu standard.

 Varian AA140/240/280 Atomic Absorption Spectrometers

Specifications

Zeeman AA Hardware Feature

AA240 Zeeman

AA280 Zeeman

Optics:

Narrow beam optics match flame and furnace profiles. Fully sealed optics feature quartz-overcoated mirrors for enhanced protection.

Wavelength range:

185-900 nm

Optical bench:

Optics mounted on a reinforced flat plate with a fitted deep-drawn cover for protection from dust and vapor.

Monochromator:

Automated self-calibrating Czerny-Turner monochromator with microstepping driver for enhanced resolution. PC-controlled wavelength selection and peaking.

Focal length:

250 mm

330 mm

Wavelength repeatability:

± 0.04 nm

± 0.035 nm

Wavelength slew rate:

2000 nm/min.

2025 nm/min.

Grating:

Holographic diffraction grating with 1200 lines/mm blazed at 240 nm.

Holographic diffraction grating with 1800 lines/mm blazed at 240 nm.

Dispersion 3.1-2.3 nm/mm

Dispersion 1.6-0.8 nm/mm

Detector:

Selected high sensitivity R955 photomultiplier tube for maximum signal to noise performance.

Selected high sensitivity photomultiplier tube for maximum signal to noise performance.

Slits:

Automated slit selection. Settings: 0.2, 0.5 and 1.0 nm plus reduced height 0.5 nm slit.

Automated slit selection Settings: 0.1, 0.2, 0.5 and 1.0 nm plus reduced height 0.5 nm slit.

Lamp support:

4 lamps mounted in fixed positions Fast lamp selection using an automated mirror.

8 lamps mounted in fixed positions Fast lamp selection using an automated mirror.

185-900 nm

Accommodates single or multi-element, coded or uncoded lamps. Compatible with high intensity UltrAA lamps. Lamps secured by the base without restraining clips or power cables. Lamps automatically switched off at the end of analysis. Users can elect to leave the lamp on at the end of an autorun. Automated pre-warming of next lamp in sequence. UltrAA lamp looming fitted as standard for use with external control module. Optional integral control module supports 2 UltrAA lamps.

Factory-installed UltrAA lamp looming supports up to 4 high intensity UltrAA lamps. Integral control module supports 2 UltrAA lamps as standard, with support for 2 additional lamps using an external control module.

Zeeman background corrector:

Features electronically modulated (twice mains frequency) transverse AC electromagnet with peak field-on strength of 0.8 Tesla during Read period. Less than 5 ms response time between background and atomic measurements with 3 point polynomial interpolation of background signals for enhanced correction capability with rapidly changing background signals. Corrects up to 2.5 background absorbance. Background correction available across full wavelength range. Magnetic field strength PC-controlled over range 0.1–0.8 Tesla, enabling optimization of background correction for enhanced sensitivity and reduced interferences. Magnet field strength locked during measurement minimizing effect of mains voltage variations. Coil sealed against moisture and corrosive vapors and fitted with a magnet temperature interlock for over-temperature protection. Complies with International Commission on Non-Ionizing Radiation Protection (ICNIRP) guidelines for exposure to time-varying magnetic fields.

Furnace safety system:

Three instrument safety interlocks monitor mains power, magnet connected and magnet temperature. Five additional furnace safety interlocks monitor inert gas pressure, cooling water pressure and temperature, graphite tube presence and transformer temperature. Violation of any safety interlock either inhibits Zeeman furnace operation or terminates furnace firing.

 Varian AA140/240/280 Atomic Absorption Spectrometers

Specifications

SpectrAA Base software User interface:

Features Varian’s innovative ‘worksheet’ concept for data display. Analytical results are presented in a spreadsheet format of samples (rows) and elements/wavelengths (columns). Each worksheet cell provides the concentration or absorbance (intensity) result for each sample and element result with a simple click of  the mouse. Datalog displays the history of events including instrument parameters used, all analytical results and any software messages.

Methods and sequences:

Entry of the element symbol recalls recommended method parameters (including recommended temperature program for furnace methods). Method search facility. Measure up to 999 randomly selected samples for up to 30 methods. Analytical method ‘Cookbook’ information available for each element. Programmable delay before start of any method for system stabilization. Optional tube condition or tube clean facility at start of each furnace method. First measurement at start of sequence can be either Calibration Zero blank, Calibration, Reslope or solution. Pause autorun at any time and restart from any method/sample. Interrupt autorun for measurement of any element/sample combination without pausing the autorun using Random Sample function. Options to store signal graphics during analysis. Sequence completion options include control over lamps, flame and alarm.

On-line cookbook:

Analytical methods ‘cookbook’ information displayed for each method in the Method window. Includes typical calibration graph and list of alternative wavelengths with comparative sensitivities and any other analytical recommendations.

SRM Auto-optimization:

Surface Response Methodology (SRM) auto-optimization routine can be applied to optimize graphite furnace parameters for any selected elements. The SRM Wizard models the absorbance as a function of the ashing and atomization temperatures and sets the recommended optimum parameters into the method.

Measurement modes:

Absorption or flame emission using PROMT, Integration, Integrate Repeat, peak height or area, furnace PROMT height or area. Pre-read delay variable from 0-999 secs. Up to 20 replicates with read time from 0.1-30 secs. Minimum Signal Facility skips to the next sample if the first measurement is less than the specified minimum reading. Different number of replicates can be selected for samples and standards.

Sampling modes:

Supports manual or autosampling with flame, furnace and vapor operation.

Pre-emptive sampling:

Allows the software to calculate the time required for sampling and reading when using flame autosampling. When enabled, the software will move the probe to the next sample while a reading is in progress. The reading is completed using the remaining solution in the transfer line. This reduces the pre-read delay, improving the productivity of flame analyses by up to 15 %.

Smart Rinse™:

When enabled, the software will monitor the absorbance signal during a rinse until it falls below the user defined minimum absorbance, or the rinse time has elapsed. Once the min. absorbance value is reached, the next sample is automatically presented. Smart Rinse automatically optimizes the rinse times, eliminating contamination and improving sample throughput when using flame autosampling.

SIPS support:

Supports both single pump SIPS-10 or dual pump SIPS-20 Sample Introduction Pump Systems.

Weight and volume correction:

Optional during run. Also allows correction for pre-analysis dilutions. Correction factors may be imported in ASCII format.

Internal standard correction:

Corrections can be applied on-line in Fast Sequential mode to improve precision and accuracy by correcting for physical differences, sample preparation errors or long term drift. Program the system to monitor the absorbance of a selected internal standard analyte and apply corrections to all elements included in that measurement. Requires optional PRO software.

Calibration and blank correction:

Up to 10 standards with separate Calibration Zero blank and multiple Reagent Blanks. Calibration in Concentration, Bracketing Standards, Standard Additions and Direct Abs readout. Signal Expansion factor of 0.1-100 available in all calibration modes. Choice of 8 least-squares calibration algorithms from New Rational, Rational, Linear, Quadratic and Cubic (weighted fit or forced through zero). Calibration goodness of fit data display can be viewed or printed for compliance with GLP requirements. Programmable recalibration and reslope rates for each method. Built-in excess curvature and inflection tests provided with user-selectable error action options including Stop; Continue in Abs or Switch to Next Method. Create a ‘Reference Calibration’ from any current calibration. This can be displayed and overlaid with the current calibration to help assess goodness of fit.

QC Protocols:

Ten Quality Control tests for flame, vapor and furnace AA: QC Blank, QC Standard, QC Spike, Matrix Spike, Lab Control Sample, Duplicate, Precision (replicate %RSD), Correlation Coefficient and Detection Limit tests. Each test offers action options in the event of test failure, including: Stop; Flag and continue; Retry, flag and continue; Recalibrate and repeat; Switch to next method. All data is date and time stamped. QC Tests may be performed at a defined rate (based on solution or replicate measurements) and/or added manually into the sequence. Optional PRO software extends QC Protocols supporting further flexibility from a simple equation editor and extended capabilities that allow testing to US EPA and US CLP protocols. Other international compliance standards can be easily met by customizing QCP.

 Varian AA140/240/280 Atomic Absorption Spectrometers

Specifications

SpectrAA Base software continued Data display:

Customize the display with a choice of up to four windows selected from: Worksheet, Signal graphics, Calibration graph, Data log. Can also display push buttons, current method status block and large replicate display boxes providing a display of concentration, mean absorbance, mean background and precision (%RSD). Data log displays all data including instrument parameters, time and date stamps. All replicate readings and error messages (where applicable) are displayed in a scrollable window for review of previous results at any time. All graphics are displayed in real time. Signals and different calibration algorithms can be overlaid for comparison. Graphics cursor displays atomic absorbance/intensity with time/concentration and temperature. Zoom signals for detailed analysis. Independent scaling of absorbance, time and temperature axes. Wavelength scanning with scan rate variable from 5-250 nm/min.

Data handling:

All raw data, signals (when selected), method and sequence parameters are stored in one worksheet file. Furnace data is stored in both height and area. Weight, volume and dilution correction factors can be applied before or during the analysis. Editing of results by masking replicate or solution results and post run modification of peak measurement mode with automatic recalculation of edited result. Calibration data can also be edited by masking standards. Post-run application of alternative calibration algorithms. Full unit conversion facilities are available allowing reporting of calibration standards in one set of units, while reporting sample results in another set of user definable units.

Data import/export:

Data can be exported during or after analysis in ASCII and PRN file formats. In addition, current data can be transferred directly into third party software using Microsoft Active X/OLE technology, which uses Windows COM control to allow bi-directional flow of data. This supports manipulation of data from the AA using other applications running on the desktop, and provides capability for remote control of the AA.

Reporting:

Reports can be printed automatically during or after analysis or manually at any time. User-selectable sequential or multi-element formats. Reports can be customized to include: calibration results, calibration graphs, method parameters and notes, mean concentration, mean absorbance, precision (% RSD and/or SD), replicate readings, mean background, date/time, correction factors and signal graphics. Print preview facility.

Administration:

Provides access to the usage counters enabling you to track the operating hours of lamps (HC and deuterium lamps), electrodes and pump tubing. This enables you to reduce downtime and running costs, and assists with GLP compliance. The usage counters also enable you to track replicate and sample measurements. Allows library (customized) methods to be deleted. Allows access to the software configuration settings. Custom Rack Wizard allows user to program the SPS autosampler to use custom racks by defining the rack location, rack grid and tube positions of the rack/s. Optional password protection available covering worksheets (adding/deleting methods or editing existing methods and sequence parameters), data editing, deletion of results, creating custom racks and software configuration.

LIMS support:

Data can be directed to a serial port for real time transfer to LIMS in ASCII or PRN file formats. Weight/volume and dilution correction factors may be imported in ASCII format. Sample labels and sample select marks (samples selected for analysis) can be imported in ASCII format.

Help system:

Context sensitive help with extensive indexing and cross referencing on key words plus comprehensive multimedia content including video training materials for ease of use and enhanced productivity.

Optional software PRO version software:

Optional software providing additional capabilities for Duo operation (simultaneous flame & furnace operation), Fast Sequential AA operation for fast multi-element flame AA determinations, Internal standard correction capability and additional QC capabilities including the capability to customize QC tests.

CFR version software:

Optional software which assists users to achieve compliance with the requirements of the US FDA 21 CFR Part 11 ruling covering audit trails, electronic records and electronic signatures. For further information, request publication no. 8510191800 titled "21 CFR Part 11 Electronic Records Electronic SignaturesCompliance with Varian, Inc. Spectroscopy Instruments"  from your Varian office or representative, or download this from Varian’s web site.

 Varian AA140/240/280 Atomic Absorption Spectrometers

Specifications

Computers The following configurations are suitable for operation of the SpectrAA software Minimum:

Intel Pentium III 500 Mhz processor, 256 MB RAM, 17 inch super VGA monitor, graphics card supporting 1024 x 768 resolution, 4 GB hard disk, CD-ROM drive, sound card and speakers, at least 1 USB port, at least 1 serial (RS 232) port and Windows® operating system.

Recommended:

Intel Pentium 4 2Ghz processor, 512 MB RAM, 17 inch super VGA monitor, graphics card supporting 1024 x 768 resolution, 40 GB hard disk, 24 X CD-ROM drive, 16 bit sound card and speakers, at least 1 USB port, 2 serial (RS 232) ports and Windows® operating system.

Operating system:

SpectrAA ‘worksheet’ based software is compatible with Windows® 2000 (Service Pack 2) or Windows® XP Professional (Service Pack 1) operating systems running on external PC with mouse or keyboard control. Note: The PC must have 1 spare PCI expansion slot for the PCI-IEEE interface card. The computer must be certified to at least one of the following standards to ensure the electrical safety is not compromised: UL 1950, CSA C22-2 No. 950-95, ICE 950 or ICE 60950, EN 60950

Accessories Flame autosampling:

SPS series Sample Preparation Systems provide fast, random access, X, Z, theta arm movement using a serial (RS232) interface. SPS3 provides capacity for 1 standard and 3 sample racks. SPS2 provides capacity for 1 standard and 2 sample racks. Racks may be exchanged during analysis for unlimited sample capacity. Choice of standards racks available suitable for use with either 16 mm O.D. test tubes (SPS3 supports up to 11 tubes; SPS2 supports up to 10 tubes) or 29 mm O.D. centrifuge tubes (SPS3 supports up to 6 tubes; SPS2 supports up to 5 tubes). Any sample rack can also be used for standards. SPS series are supplied complete with 60 position sample racks for 16 mm O.D. test tubes (SPS3 is supplied with 3 racks; SPS2 is supplied with 2 racks). SPS series are compatible with low cost, autoclavable polypropylene sample racks. The Custom Racks Wizard enables you to handle your own rack types. Probe contamination is eliminated with the integral peristaltic pump (optional on the SPS2) which provides flow through rinsing of the probe. SPS3 includes variable pump speed control. SpectrAA software provides a visual representation of the layout of all standards, samples and QC solutions defined in the sample racks.

Traveling rinse:

Traveling Rinse option for the SPS3 provides improved productivity. With the Traveling Rinse, the rinse station is built into the tip of the probe, allowing external and internal rinsing of the probe as it is drawn up from the solution. This ensures the most rapid rinse out possible, improving sample throughput.

Sampler cover:

An optional environmental enclosure is available for the SPS series. This can be purged, minimizing sample contamination from airborne contaminants – or can be connected to an exhaust outlet, enabling removal of  any corrosive or toxic fumes during sampling.

Dilution and sample preparation:

On-line diluter available for the SPS3 (factory fitted option) for pre-mixing of samples prior to sampling, or on-line over-range sample dilution. SpectrAA software automatically and serially dilutes the samples until the analyte result is in range. Racks may be dedicated to empty dilution tubes or empty tubes may be placed in the sample racks. Optional Roboprep™ software enhances dilution capabilities with off-line sample dilution and preparation of multi-element standards and reagent addition. Diluter features precision 20 mL syringe with Teflon holding coil. Dispenses 0.02-125 mL with total dilution volume of 125 mL. Maximum dilution ratio of 1:200. ‘Smart Mixing’ ensures homogeneity without splashing. Programmable syringe speed, rinse volume and mixing period. Typical error for a 1 in 20 dilution to a total volume of 20 mL