ErgoHeight Adjustable Work Stations

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  1. StockedStockedBioSafe classic logoBioSafe classic logoUL Weight Limit 880 lbUL Weight Limit 880 lb
    1 Load Capacity1 Top Material1 Top Design4 Width1 Depth1 Height

    • Design free of cracks and crevices where microbes can colonize
    • Rounded corners for easy wipe downs
    • Isolates surface from intrinsic vibration, protects operators from nausea during microscopy work
    • Prevents sensitive anlytical instruments from frequent recalibration
    • Designed for life science applications, such as food science, genomics and proteomics
    Load Capacity: 880 lb
    Top Material: 304 Stainless Steel
    Top Design: Solid
    Width: 36", 48", 60", 72"
    Depth: 30"
    Height: 30" - 51"
  2. StockedStockedBioSafe classic logoBioSafe classic logoUL Weight Limit 880 lbUL Weight Limit 880 lb
    1 Load Capacity5 Top Material2 Top Design2 Frame Material6 Width1 Depth1 Height

    • Ergonomic electric adjustable height cleanroom table easily changes height with the push of a button
    • Front key pad stores up to 4 heights and displays exact desk height for hassle free adjustment
    • Quickly change positions throughout the workday for improved health and productivity
    • Sealed design guards against contamination and meet ISO 5 (Class 100) particle standards
    • Heavy duty legs support up to 880 lbs; safely adjust height without moving equipment off table
    Load Capacity: 880 lb
    Top Material: 304 Stainless Steel, Static-Dissipative Laminate, Non-Dissipative Laminate, Polypropylene, Corian
    Top Design: Solid, Perforated
    Frame Material: 304 SS, PCS
    Width: 48", 60", 72", 84", 96", 36"
    Depth: 30"
    Height: 28"-43"
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Adjustable Workstation Features

ErgoHeight Automatic Adjustable Work Station

ErgoHeight tables provide a 15" range of vertical motion to ensure personnel comfort without disrupting tabletop set-ups; all-stainless steel construction and sealed lifting mechanism for cleanroom use

Human Vibration Sensitivity Threshold

Intrinsic levels of vibration in common workplace settings. Humans can sense vibration near 200 um/sec when performing microscopy work.

BioSafe®: Terra's Ultimate Cleanliness Rating

Terra's BioSafe products are designed for life science applications: no gaps and crevices where microbes can colonize, rounded corners for easy disinfection, won't produce contaminants during sterilization, and exceed cGMP, IEST, ASTM and ISO 14644-1 requirements.

ErgoHeight Intuitive Controls

ErgoHeight compact control panel includes four buttons for user height presets and a digital display

ErgoHeight Reinforced Frame

The reinforced steel frame of the ErgoHeight adjustable-height table enhances lateral stability, ensuring a stable work surface ideal for microscopy and high-precision benchtop equipment.

Enhanced Clarity Eliminates Operator Fatigue and Nausea

Instrument isolation platform and table systems enhance microscope image clarity and eliminates operator fatigue and nausea.

UL-Tested Cleanroom Workbenches for Highest Quality and Safety

Ensuring the safety of your personnel and equipment is essential. UL is recognized around the world as the leader in product safety testing and certification. Terra’s cleanroom workbenches are tested by UL to meet the strictest safety and stability standards.

Continuous Product Improvement

At Terra, we strive to develop and produce the highest quality products for our customers to improve health, safety, performance, and yields. Our product quality is enabled by high-grade manufacturing equipment and processes, 45 years of engineering and application expertise, and our commitment to continuously improve.

OpenTop Perforated Top

Hidden reinforcements minimize dead spots, add strength, and eliminate deflection without dead spaces whereas conventional perforated tops rely on “blank out” support panels, which create turbulence in cleanroom laminar flow.

Bull-Nose Rounded Edge Comparison

Terra's one-piece bull-nose rounded edges increase operator comfort and reduce particulate shedding caused by sharp or abrasive edges. The smooth, continuous-seam welds also eliminate cracks and crevices that can harbor contaminants.

Vibration-Isolated Configurations for Improved Stability

ErgoHeight workstations can be configured with vibration dampening tabletops. The pneumatic vibration-free mounts isolate up to 90% of building vibration to improve stability for vibration sensitive operations and minimize worker fatigue and nausea during high-magnification work.

Benchtop Vertical Laminar Flow Hood with Automatic Height Adjusting Table

Vertical laminar flow hoods provide a HEPA-filtered work area for protection from particle contaminants. Benchtop laminar flow hoods can easily mount to an automatic height adjusting table (28”-43”H). Perfect for workstations with heavy or fragile equipment.

Stainless Steel Glovebox on Automatic Height Adjusting Table with N2 Generator

Gloveboxes can easily mount to an automatic height adjusting table (28”-43”H). Ideal for workstations with sensitive equipment that undergo frequent height adjustment. A compact Nitrogen generator requires only a compressed air supply for continued nitrogen gas supply.

Vertical Laminar Flow Clean Bench with Automatic Height Adjusting Table

Automatic height adjusting tables fit perfectly inside free-standing laminar flow clean benches. The separate workstation helps isolate vibration from the fans mounted above the hood. Dual motor electric height adjusting columns beneath the table allow users to quickly raise or lower the work surface without moving equipment off the table.

ErgoHeight Adjustable Work Stations

  • Ergo Height Auto Adjustable Cleanroom Work Station

Technical Resources

Electropolishing Standards and Guidelines

Overview

This document provides a description of the electropolishing procedures performed by Terra Universal. It also specifies a series of criteria for evaluating the integrity and cleanliness of the electropolished surfaces. Because these electropolishing procedures are followed on all work performed by Terra Universal, the results may be understood as indicative of standard Terra Universal electropolishing, and the specified evaluation criteria may be used as acceptance standards for work performed by Terra Universal.

Introduction

Electropolishing is a reverse plating procedure that entails the electrochemical removal of metal (including carbon, silica, iron, and other impurities) from a stainless steel surface.

Prior to electropolishing, parts are mechanically prepared to ensure optimal results. All welds are ground, deburred, and inspected to ensure that all seams are free of pockets or gaps. Finally, selected surfaces are mechanically buffed to a smooth finish.

Next, the part is fitted with electrodes, immersed in an electrolyte solution, and subjected to a direct electrical current. During this electrolytic process, the metallic surface of the the anodic part is removed ion by ion, yielding a nickel and chromium-rich surface free of microscopic “peaks” or “valleys” that could lead to metal fatigue or contamination. Optimal results depend on careful control over the current density, the precise chemical composition of the electrolytic solution, and the temperature and agitation of the bath, and the duration of current exposure.

Unlike mechanically finished stainless steel, electropolished surfaces feature no fine directional lines and hence offer less friction and surface drag. The chromium-rich surface offers excellent light reflection, yielding a bright, smooth and uniform polish.

Electropolishing Procedures

Terra Universal electropolishing is carefully controlled in each of the following areas to ensure the finest results possible.

  1. Material Selection: Terra Universal electropolishing is performed on 304 stainless steel with either a 2B or 4 mill finish. This material standard minimizes the presence of sulfide inclusions and other subsurface contaminants and end-grain or large-grain surfaces that can produce a frosty appearance following electropolishing. Incoming material is also inspected for improper annealing, overpickling, heat scale, and directional roll marks, all of which are accentuated by electropolishing.
  2. Precleaning and Postcleaning: For optimal results, it is important that all surfaces be uniformly exposed to the electrolyte solution, but also that provisions be made to remove all traces of the solution following electropolishing. Failure to remove the solution can result in subsequent outgassing unacceptable in a clean room environment.

    Stainless steel parts intended for electropolishing are designed with these requirements in mind. All welds are carefully inspected to ensure continuous seams, free of pits or gaps where the solution could collect, and all hollow members are drilled to permit effective flushing of the solution after electropolishing.

    Because the electropolishing process removes only a very thin surface layer (typically between 0.001" and 0.0001"), selected surfaces are mechanically buffed, using progressively finer grits to produce the smoothest possible finish.

    Following electropolishing, all traces of the electrolyte solution are thoroughly removed from the part, and any hollow cavities are flushed to eliminate the chance of subsequent outgassing. Surfaces are then dried and buffed with a soft, non-particulating cloth.

  3. Process Controls: The more rigorously the electropolishing process variables are controlled, the higher the quality that can be expected in the finished product.

    Some of these variables are relatively easy to quantify and monitor, although some variation must be exercised in response to a given sample in order to produce the optimal results.

    • Electrolyte Bath: The chemistry of the bath must be constantly monitored, with special attention to the specific gravity (an indicator of water content), the acid concentration, and the metals content.

    • Current: A supply of clean, ripple-free DC power must be available to drive the process, as well as appropriately sized cables and connectors to the anodes and cathodes. Current density (amperes/square foot) must be carefully monitored and regulated.

    For other variables, effective control depends on significant experience. Attention to these considerations, combined with close adherence to the procedures mentioned above, results in a truly superior electropolished finish.

    • Electrode Positioning: Electrode placement is critical to the success of the electropolishing process. Although electrode clamping of objects with a uniform geometrical shape is generally a straightforward task, irregularly shaped objects, which often contain inaccessible cavities or areas exposed to low current densities, present special challenges. Only an experienced technician, equipped with versatile electrode fittings, can ensure optimal results in these situations.

    • Electrolyte Temperature: Varying situations may call for varying temperatures, and heating and/or cooling during the electropolishing process may be required.
    • Electrolyte Agitation: Only an experienced technician possesses the knowledge of where, when and how to agitate either the electrolyte or the part in order to prevent gassing streaks, flow marks, and similar unacceptable surface anomalies.
    • Current Duration: The optimal duration of current exposure depends on the part size and shape. Again, only an experienced electropolisher can control this variable to produce the best results.
Performance Evaluation Parameters
  1. Visual Inspection: The first and most obvious test of the effectiveness of the electropolishing is a close visual inspection. In a closely controlled process performed on high-quality material that is adequately prepared for electropolishing, the surface will appear uniformly brilliant, with no detectable pits, streaks, erosion, "frosting", or other anomalies.

    Unlike mechanical buffing, which distorts the surface of the metal and may conceal the material’s true characteristics, electropolishing reveals the imperfections in the structure of the stainless steel. Electropolishing will accentuate any welding flaws, and a nonuniform appearance indicates a high volume of inclusions or a large-grained grade of stainless steel.

  2. Micrographs: A better test of the integrity of the surface is provided by photomicrographs of the surface. Although a highly buffed (such as a No. 8 mil finish) sample and an electropolished sample may appear equally brilliant to the unaided eye, the differences between the two are apparent when they are viewed under very high magnifications. The sample micrographs below, taken at 1,000X, dramatically illustrate the smooth, featureless surface that results from electropolishing.

Before Electropolishing

This photomicrograph represents the surface of 304 stainless steel with a No. 2B mill finish before Electropolishing. Note that the etched boundaries between the grains are only partially sealed, resulting in a network of sub-surface crevices. Contaminants that lodge in these crevices are protected from contact with cleaning agents leading to subsequent migration of trapped contaminants onto the cleaned surface.

After Electropolishing

This photomicrograph represents the same No. 2B surface after Electropolishing. Note that the surface is now completely featureless on a microscopic level and has the desired noncontaminating, non-particulating and non-sticking properties.

Before Electropolishing

This photomicrograph represents a 304 stainless steel surface with a mechanically polished No. 4 mill finish before Electropolishing. Note the deep grooves, cavities, torn metal and other microscopic imperfections that entrap and retain contaminants.

After Electropolishing

This photomicrograph represents the same No. 4 finish after Electropolishing. The surface may still show some of the abrasiveproduced topography to the naked eye, but will now be microscopically featureless with the desired non-contaminating, non particulating and non-sticking properties.




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