NIST Requirements.docx

NIST Requirements Resistance Ratio Temperature Measurement System

I. BACKGROUND INFORMATION

One of the missions of Pressure and Vacuum group at Sensor Science Division is to develop photonics-based, next-generation thermodynamic metrology platform for precise and accurate measure of pressure, vacuum, and temperature. One of the sub-branches of thermodynamic metrology platform is the development of quantum SI photonics-based temperature sensors and primary standards. This new technology can be an alternative to SPRT (Standard Platinum Resistance Thermometer). For the development of new measurement capabilities with a photonic thermometer NIST requires a high-accuracy resistance bridge to conduct benchmark comparison toe SPRT thermometer and International Temperature Scale of 1990.

II. SCOPE

The group requires a new resistance ratio temperature measurement system to be able to conduct benchmark comparison of photonic thermometer to SPRT. The replacement system must be easily integrated into existing measurement service infrastructure and LabView-based, custom-designed and NIST-maintained automation software.

III. MINIMUM REQUIREMENTS

The system shall meet or exceed the minimum requirements identified below. All items must be new. Used or remanufactured equipment will not be considered for award. Experimental, prototype, or custom items will not be considered. The use of “gray market” components not authorized for sale in the U.S. by the Contractor is not acceptable. All line items shall be shipped in the original manufacturer’s packaging and include all original documentation and software, when applicable.

The Contractor shall provide one (1) resistance ratio temperature measurement system that meets the following minimum specifications:

1. Accuracy:70 ppb (70x10-9)

a. Achieved over all three SPRT measurement modes, outlined below:

i. nominal 25.5 Ω SPRT measured over the range: 5 Ω - 90 Ω

ii. nominal 2.5 Ω SPRT measured over the range: 2 Ω - 12 Ω

iii. nominal 0.25 Ω SPRT measured over the range: 0.2 Ω - 1.2 Ω

b. Utilizing a single standard reference resistor (1 Ω, 25 Ω, 10 Ω, or 100 Ω) for each SPRT measurement mode. Systems which require the use of two or more reference resistors within a single mode to cover the full measurement range or to meet the minimum accuracy specifications will not be accepted.

i. The system must support continued use of the laboratory’s low-drift standard reference resistors (model Tinsley 5685A), which have been characterized extensively by NIST. The lab maintains multiple decades of calibration history on these artifacts (traceable to the NIST Quantum Hall Resistor), and their continued use is required to maintain quality assurance and consistency in calibration history.

c. Accuracy specifications will be evaluated experimentally as described in the NIST SP250-81, to determine the impact of bridge repeatability and bridge non-linearity on temperature measurements.

i. For example, for a nominal 25.5 Ω SPRT measured at the triple-point of water, the bridge non-linearity must contribute no more than 20 µK to the overall measurement uncertainty to maintain current calibration capabilities.

2. Resolution: lower than 10 ppb (10x10-9)

a. Achieved over all three SPRT measurement modes, outlined below:

i. nominal 25.5 Ω SPRT measured over the range: 5 Ω - 90 Ω

ii. nominal 2.5 Ω SPRT measured over the range: 2 Ω - 12 Ω

iii. nominal 0.25 Ω SPRT measured over the range: 0.2 Ω - 1.2 Ω

b. Utilizing a single standard reference resistor (1 Ω, 25 Ω, 10 Ω, or 100 Ω) for each SPRT measurement mode. Systems which require the use of two or more reference resistors within a single mode to cover the full measurement range or to meet the minimum resolution specifications will not be accepted.

i. The system must support continued use of the laboratory’s low-drift standard reference resistors (model Tinsley 5685A), which have been characterized extensively by NIST. The lab maintains multiple decades of calibration history on these artifacts (traceable to the NIST Quantum Hall Resistor), and their continued use is required to maintain quality assurance and consistency in calibration history.

3. Stronger consideration will be given to a system that provides front panel display of real-time data output.

4. Must provide option for front panel operation

5. Must provide option for remote control and data collection via GPIB interfacing

6. Stronger consideration will be given to a system that provides common accessible command set, programmable via NIST LabView code

7. Must support automated measurements of SPRTs across multiple laboratory workstations, without manual switching.

8. Environmental operating conditions: System must deliver minimum technical specifications outlined in this document over the temperature and humidity range: 15 °C to 25 °C, 10% - 65% RH

9. The standard instrumentation rack mount shall utilize 110 VAC power

10. System must support continuously-powered operation, with active measurement processes running 40 h to 120 h per week over the lifespan of the system.

11. The Contractor shall provide hardware that consists of an ultra-high precision thermometry bridge

12. The Contractor is not required to provide software, but the system must allow real-time interface to NIST-developed LabVIEW control and data collection code.

13. The Contractor shall provide all necessary operating manuals and maintenance instructions.

IV. Delivery Delivery terms will be FOB Destination and shall occur no later than be ninety (90) ARO.

FOB Destination means: The contractor shall pack and mark the shipment in conformance with carrier requirements, deliver the shipment in good order and condition to the point of delivery specified in the purchase order, be responsible for any loss of and/or damage to the goods occurring before receipt and acceptance of the shipment by the consignee at the delivery point specified in the purchase order; and pay all charges to the specified point of delivery. The contractor shall deliver all Line Items to:

National Institute of Standards and Technology 100 Bureau Drive, Gaithersburg, MD 20899-1640

V. DELIVERABLES

VI. INSPECTION AND ACCEPTANCE

In addition to the inspection and acceptance terms articulated in 52.212-4, the Government reserves the right to perform such performance tests and evaluations as defined below to verify specified system performance. Such tests and evaluations, if performed, shall be conducted within the environment that the system is to be operated. The Contractor has the right to be present during the tests and evaluations, if performed, at the Contractor’s expense. These tests shall include:

NIST personnel will verify equipment operation meets technical standards post installation, at a level that meets or exceeds current calibration uncertainties, as outlined in NIST SP250-81. This will be accomplished by evaluation via Automated Resistance Bridge Calibrator, resistor compliments checks, and bridge repeatability testing.

The Government will test, inspect, and accept the equipment onsite within 20 business days of the receipt of the resistance ratio temperature measurement system. A visual inspection of the resistance ratio temperature measurement system will be performed by the NIST SME to identify surface defects or any form of indication that the resistance ratio temperature measurement system was damaged during transport to NIST. The Government shall have sole discretion to require repair or replacement of damaged and/or nonconforming supplies at no cost to the Government. The Government at any time prior to acceptance shall reject the resistance ratio temperature measurement system due to defects and/or nonconformance.

VII. Installation

Onsite installation and demonstration shall be done at NIST by NIST personnel, (Gaithersburg, MD- Building 220)

VIII. WARRANTY

The contractor shall warrant the entire system for a period of a minimum of one (1) year after receipt of the equipment and shall be in accordance with terms in FAR 52.212-4

IX. Payment Schedule The Contractor shall be paid, in accordance with Net 30-day payment terms, upon receipt and acceptance of a proper invoice, in accordance with the following schedule:

1. 100% after installation and acceptance by the SME of fully installed system.

2. The Government anticipates inspection will occur upon:

a. After the testing procedures set forth in this document have been completed