SATPC0035050 Tab 10 SOW_Redacted.pdf

Statement of Work

1. Objective/ Requirements

Langley Research Center has a requirement for the products listed below:

2. Characteristics, Scope, and Specs

QTY Description Part Number

1 Desiccator; Adjust-A-Shelf, Static Dissipative PVC, 10 Chambers, 35 W x 18 D x 60 H

-purge desiccator cabinet provides versatile low-humidity storage down to 0% RH -humidity control

-wired for integration with automatic humidity control system -sensitive materials: microelectronics, medical devices, pharmaceutical powders for faster recovery times and more uniform low-humidity conditions -A-Shelf desiccator cabinets are designed for storage of moisture-, ESD-, and contaminationsensitive materials that require automatic low-humidity set-point control.

and NitroWatch and NitroWatch are separate modules that mount on top of the desiccator cabinet. The combined system provides automatic humidity control from ambient down to 0% RH and helps conserve nitrogen.

monitors and displays RH readings from a single sensor mounted inside the cabinet. The Dual Purge uses two gas flow settings (high/low) to rapidly reach and then maintain the user-specified RH set-point.

-flow is triggered when RH is above set-point, or when a door opens (triggered by magnetic door sensors). The high-flow setting helps expedite set-point recovery.

-laden air to be displaced and released through the automatic relief/bleed (RB) valves. This steady bleed causes the concentration of dry nitrogen gas inside the desiccator to increase until the desired RH level is reached.

-point is reached, the system reverts from high-flow to low-flow nitrogen gas supply to maintain the set-point and conserve nitrogen. When RH climbs above the set-point, the system re-activates high-flow to accelerate moisture removal.

other chambers of the cabinet.

-Safe Design:

-dissipative PVC (SD-PVC) design features bonded dissipative layers that resist abrasion and retain surface resistivity of 106 - 108 ohms/square indefinitely (unlike spray-on coatings that can wear off after a few years). SD-PVC also eliminates static-cling to help maintain clean surfaces.

-discharge surface charges and eliminate the risk of electrostatic discharge.

-SPEC 1686 and 1772 with selection of proper accessories.

t Design:

-A-Shelf desiccator cabinet is compartmentalized into isolated chambers to improve moisture control and recovery. The multiple air spaces are independent and thus RH in one chamber is unaffected by access to adjacent chambers.

The plenum pressurizes and simultaneously distributes gas through small perforations in the wall to each chamber in the cabinet.

-key operation with Dual Purge and NitroWatch automatic RH control system. Each chamber includes a magnetic door sensor that connects to a central manifold. Wiring to connect the RH sensor is also pre-installed.

-fusing technology creates a rigid, durable structure for improved weight capacity and resistance to high-frequency vibrations.

(Relief/Bleed) valves on each chamber relieve excess pressure inside the cabinet without allowing outside air or contaminants inside.

can also be removed and used as carrying trays.

s doors with 304 stainless steel reinforced frames extend desiccator cabinet's service life and provide a tight seal.

-shape non-outgassing rubber gasket firmly compresses to eliminate leaks. The one-piece resilient rubber gasket maintains its shape after compression and won't flatten, warp, crack, or degrade like ordinary foam gasket. Gasket is also mechanically attached to the door frame to avoid adhesive failure common with gasket tapes.

-duty lift latches prevent metal-on-metal scraping common with rotary latches; chrome-plated included standard; upgrade to all-stainless steel (304 or 316) to minimize scratching, corrosion and contamination resulting over time that can occur with chrome-plated latches.

3950-07D