Specifications.pdf
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- Attached to
- Force Calibration System
- Solicitation number
- 1333ND25QNB640408
About this file
This is a Statement of Work (SOW) or requirements document for a Force Calibration System for Primary Hardness Standard Machines issued by the NIST Hardness Standardization Laboratory. The laboratory requires a new digital precision amplifier and three force transducers (load cells) to replace their aging force calibration system and maintain alignment with international National Metrology Institutes.
The contractor must deliver a Digital Precision Amplifier with desktop housing capable of simultaneous connection of at least two force transducers, accuracy of ≤0.0005%, USB and Ethernet connectivity, PC software for control and data collection, and 115V USA power compatibility. Three Force Transducers are required with capacities of 2 kN, 500 N, and 100 N maximum, each capable of measuring force with expanded uncertainty ≤0.01% of applied force (95% confidence level) and complying with ISO 376 Class 00 specifications. All equipment must include calibration certificates traceable to a National Metrology Institute. Additional deliverables include a double-shielded signal cable (≥3m), user manuals, and interfacing software supporting data logging and automation. Delivery is required within 120 days of award to NIST Loading Dock in Gaithersburg, MD. The contractor must provide a minimum one-year warranty covering parts, labor, travel, and technical support, with acceptance testing requiring up to two weeks for verification by the Subject Matter Expert.
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Other files
| File | Type | Posted |
|---|---|---|
| Amended RFQ.pdf | ||
| Amended Provisions Clauses.pdf | ||
| Request for Quotation .pdf | ||
| Provisions Clauses.pdf |
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REQUIREMENTS
Force Calibration System for Primary Hardness Standard Machines
I. BACKGROUND INFORMATION
The NIST Hardness Standardization Laboratory maintains the U.S. national realizations of hardness scales in support of Standard Reference Materials (SRMs) and international key comparisons. Applied force is one of the most significant factors influencing hardness measurements and scales. The laboratory’s current force calibration system is aging and lacks the performance, stability, and traceability required to maintain alignment with international National Metrology Institutes (NMIs).
II. SPECIFICATIONS
The laboratory requires a new digital precision amplifier and three force transducers (or load cells).
The upgrades will ensure the traceability, accuracy, and stability for calibrations performed on the Primary Hardness Standard Machines (PHSMs) and reduce hardness measurement uncertainty.
The contractor shall deliver a force calibration system comprising a Digital Precision Amplifier and three Force Transducers with calibration certificates traceable to an NMI.
System Requirements:
• Digital Precision Amplifier:
- shall have a desktop housing enabling the simultaneous connection of at least two force transducers
- shall have an accuracy of less than or equal to 0.0005 %
- shall include a calibration certificate traceable to a National Metrology Institute
- shall have USB and Ethernet connectivity
- shall include software to run on a PC for controlling, monitoring, and collecting data from the amplifier
- shall include a standard power connection compatible with USA plug and input voltage of 115 volts
• Force Transducers (Three different capacities):
- Shall provide one of each of the following force transducers & include calibration certificates traceable to a National Metrology Institute
- 2 kN maximum capacity;
- 500 N maximum capacity; &
- 100 N maximum capacity
- all three force transducers shall be capable of measuring force with an expanded uncertainty of less or equal to 0.01 % of the applied force (within 95 % level of confidence) and complying with the specifications of the following table:
Table 1: Characteristics of force-proving instruments Relative error of the force-proving instrument
Expanded uncertainty of applied calibration force (95 % level of confidence) of reproducibility b of repeatability b’ of interpolation fc of zero f0 of reversibility n of creep c
0.05 0.025 ± 0.025 ± 0.012
0.07 0.025 ± 0.01
The Contractor shall provide software that enables interfacing between the force calibration system and a computer; Equipment must support computer interfacing for data logging and automation; a signal cable (greater than or equal to 3 m long, double-shielded) & a user manual for the amplifier and force transducers/load cells, including operation and routine troubleshooting.
Warranty:
The Contractor shall provide a minimum one-year warranty for all hardware and calibration equipment. Warranty shall cover parts, labor, travel, and phone/online technical support. Warranty shall commence once all requirements have been met.
III. DELIVERY
Delivery shall be within 120 of award to NIST Loading Dock, Gaithersburg, MD between the hours of 8:30am to 5:00pm EST, Monday through Friday, except Federal Holidays.
IV. DELIVERABLES
Description Quantity Due Date High-Precision Amplifier One (1) 120 days after award ISO 376 Class 00 Force Transducers / Load Cells Three (3) 120 days after award Calibration Certificates (three for force transducers, one for the precision amplifier)
Four (4) 120 days after award
Signal Cable (greater than or equal to 3 m long, double-shielded)
One (1) 120 days after award
Software & Manuals One (1) set 120 days after award
V. ACCEPTANCE CRITERIA
The Contractor shall provide calibration certificates and demonstrate that all equipment complies with the specifications. The Subject Matter Expert will verify the receipt, condition, and functionality of all deliverables. A period of up to two weeks is required to complete acceptance testing. Final acceptance is contingent upon successful verification and performance of requirements.
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