NRC SOW for Visibility Day-Night Sensor S100-2MT5A5 07-05-2018.pdf

Statement of Work for the Repair and Reconditioning of Visibility Day-Night Sensor (ASN:

S100-2MT5A5)

Version: July 5, 2018

Description This Statement of Work (SOW) describes the basic work required to repair and recondition a Visibility Day-Night Sensor and final NRC quality acceptance requirements. It is not intended to be a step by step description of the repair process. The vendor will need to develop their own detailed repair procedures. The vendor will need to build a test set to test the day/night sensors if they don’t currently have one. A simple schematic of a possible test set is located at the end of this document.

Government Furnished Equipment: The vendor is responsible for all electronic parts. The NRC can provide the .5 OD flexible conduit in limited numbers, if requested.

Government Furnished Data: Day/Night test set schematic.

Vendor Furnished Equipment: The vendor is responsible for all electronic equipment and supplies. The paint used should be similar to Sherwin-Williams F8W2030 (WAEM-511 GMC White).

Recommended Equipment and Supplies: No recommendations.

First Article: Please check the Purchase Order (SF1449) for any First Article requirements. If First Articles are required, they will need to be inspected and accepted by the NRC’s Technical Inspection and Material Reception Branch before you will be given the “Notice to Proceed” from the Contracting Officer or their designated representative for the remaining units.

Description of Work – Work Procedures:

Inspect the S100-2MT5A5, Visibility Day-Night for major defects. If none found, proceed with the repair. If major defects exist that would prevent the repair of the unit, contact the National Reconditioning Center with any comments, questions, or concerns.

The following steps are just a basic outline of the minimum repair processes. The steps maybe accomplished in any order and added to as deemed necessary by the vendor.

Disassemble unit, including the removal of the electronics and disassembly of the flex conduit.

Strip and clean, prep as necessary, prime and paint Sensor and any painted parts as needed, to include flat black paint of entire window hood. Care should be taken not to paint any grounding points (specially the inside of the pole mounting bracket) or authorized labels, or areas not needing paint. The inside of the lower pole mounting bracket should be anodized metal, if the inside has been painted or is corroded, chemically remove the paint or corrosion down to the metal, leaving as much anodizing as possible. Clean flex conduit. Clean Lens assembly. Quality should be considered like-new and meet NRC Quality Controls’ of acceptability standards.

Inspect electrical wiring, circuit card, connectors, and components for corrosion, physical damage, electrical damage, or excessive discoloration due to overheating. Inspect 6 pin Molex connectors and ensure connections are undamaged. Inspect all connections and verify Gold plated Pins are used. Repair or replace unacceptable parts as needed. Unacceptable electronic parts may include the two op amps and the light sensor.

Reassemble the unit, replacing all missing, corroded, or worn hardware.

Fill the four screw holes on the Day-Night Sensor with clear RTV.

If you have access to a Visibility Electronic Enclosure, operationally test the Day-Night Sensor to ensure it passes all self-tests. If not, use the supplied schematic and build a Day/Night Sensor test box and test with it.

Return fully Functional and Reconditioned Day-Night Sensor to NRC for evaluation by the NRC’s Technical Inspection and Material Review Branch.

NRC Final Acceptance: All repaired units will be inspected for material workmanship and tested for operational performance at the NRC. To meet the material workmanship requirements, the units will need to be in a like new condition for example the unit’s paint job, cables, connectors and associated hardware. The Technical Inspection and Material Reception Branch will verify units meet both material and operational requirements and test each unit for proper and accurate functionality in the Instrument Inspections Unit’s ASOS system. Instrument Inspection Unit will verify that the inside of the pole mounting bracket, any grounding points and any labels have not been painted over. Also, the Inspection Unit will verify the use of clear RTV fill any holes in the Day-Night Sensor. Any inspected item that does not meet acceptance criteria will be returned to the vendor for rework at no additional cost to the Government.

Final Note: When unforeseen problems arise that may need clarification, please contact the contracting officer on the contract or the Weather Services Repair Branch Chief, Richard Vogel via email at richard.vogel@noaa.gov documenting the issue with as much detail as possible. If the unit has a major problem that prevents a quality repair, do not work on the item until the issue can be resolved.

WSRB Repair Branch Review: Richard Vogel, Branch Chief, July 5, 2018

TI&MR Branch Review: Greg Flores, Branch Chief, July 5, 2018 mailto:richard.vogel@noaa.gov