7. Calibration Standards Specification Procurement Package.pdf

CALIBRATION STANDARDS SPECIFICATION

PROCUREMENT PACKAGE

NAVY PRIMARY STANDARDS LAB

RESISTANCE AND SHUNT CALIBRATION

SYSTEM(S)

DEPARTMENT OF THE NAVY

METROLOGY AND CALIBRATION PROGRAM

CSS 23-0001

DISTRIBUTION STATEMENT A. APPROVED FOR PUBLIC RELEASE, DISTRIBUTION IS UNLIMITED.

OCT 2022

CALIBRATION STANDARDS SPECIFICATION

PROCUREMENT PACKAGE

NAVY PRIMARY STANDARDS LAB

RESISTANCE AND SHUNT CALIBRATION

SYSTEM(S)

Navy Primary Standards Laboratory Metrology Calibration Engineering Branch

P.O. Box 357058 San Diego, CA 92135-7058

DEPARTMENT OF THE NAVY

METROLOGY AND CALIBRATION PROGRAM

Table of Contents

1.0 Scope

1.1 General

1.2 Usage

2.0 Requirements

2.1 Electrical Power Source

2.2 Environmental Requirements

2.3 Warm-Up

2.4 Material

2.5 Markings

2.6 Range and Accuracy

2.7 System Range and Accuracy

2.8 Connections

2.9 Instrument Configurations

2.10 Power Requirements

2.11 Software Sockets

2.12 Interconnect Cables

2.13 Software and Controller Requirements

2.14 Temperature Controlled Air Bath

2.15 Temperature Controlled Fluid Bath

2.16 Resistance and Shunt Standards

2.17 Thermometer Readout

2.18 Use Environment

1.0 Scope

1.1 General

This document specifies the minimum requirements for one (1) Resistance and Shunt Calibration System. For the purpose of this Calibration Standard Specification (CSS), the Resistance and Shunt Calibration System shall be referred to as the RASCS. It is intended to be used to calibrate the Resistance and DC Current Shunt standards, and to support the Operational Inter-Lab (OI) programs.

The manufacturer shall submit a technical description or product literature for the equipment it is proposing, which clearly identifies the manufacturer, make and model. The offer must demonstrate that its proposed equipment meets or exceeds each minimum requirement described in this solicitation by providing a citation to the relevant section of its technical description or product literature.

1.2 Usage

US Navy, civilian and support contractor personnel will use the RASCS. Equipment covered by this CSS is intended for use in testing equipment and systems in the controlled environments in which test equipment is operated. The requirements of this CSS are tailored to the intended use of the equipment.

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2.0 Requirements

2.1 Electrical Power Source

The RASCS shall operate at a nominal value of 100 - 240 VAC and 50-60 Hz.

2.2 Environmental Requirements

The temperature ranges and humidity limits for both the operating and non-operating conditions are as follow. The Calibration System shall be able to meet its technical performance as listed in the product literature at a temperature between 71 and 75 degrees Fahrenheit and relative humidity between 30 to 60 percent.

2.3 Warm-Up

The RASCS shall comply with the specified performance requirements after system warm up time between the bridge and other hardware not to exceed 1 hour. This will allow for the range to be varied in an efficient manner.

2.4 Material

The RASCS shall be made of materials that are durable and capable of withstanding corrosion due to the environmental effects. The material should also be low maintenance and require little to no cleaning of the system.

2.5 Markings

The components of the RASCS shall be clearly and permanently marked in an easy to identify manner (ex. Marked 1-5). The Calibration System itself, at a minimum, shall be marked with the manufacture name, manufacture model number and serial number in a spot that is easily accessible when the RASCS is against a wall.

2.6 Range and Accuracy

The RASCS must be able to meet the system uncertainty for resistances and DC current shunts to all of the requirements below or better:

Resistance Range (Ω) System Ratio Uncertainty (µΩ/Ω)

1 Ω to 1 kΩ 0.060 10 kΩ 0.030

100 kΩ 0.10

1 MΩ 0.30

10 MΩ 1.0

100 MΩ 3.0

1 GΩ to 10 GΩ 10

Resistance Range (Ω) System Ratio

100 GΩ 30

1 TΩ 50

10 TΩ 150

100 TΩ 450

Shunt Range (Ω) System Ratio

0.1 Ω to 0.001 Ω

at 300 A 1.4

0.0001 Ω

up to 1000 A 2.8

2.7 System Range and Accuracy

The RASCS shall be able to support current up to 1000 Amps without the need for additional racks, external power supplies or calibrators and provide batching to calibrate resistors. The RASCS consisted scanners shall provide minimum of 20 channels and can handle up to 1000 VDC.

2.8 Connections

All calibration set-up, all interchange and connection of cables/adapters shall be easily accessible from the front panel. The connections from each channel to the RASCS shall be clearly marked if multiple cables are used.

2.9 Instrument Configurations

Dimensions for both width and depth shall not exceed 4 feet. The components of the RASCS without cables/adapters shall be integrated into a table top and single rack. The rack shall include fans and grounding plane. The high current Extender component shall function independently as well as with the RASCS. This feature is needed to calibrate the shunt workloads using the same standards without sacrificing lab spaces. All bridges and meters shall consist a front panel display for users to run full calibrations manually or troubleshoot discrepancies. The RASCS shall have modularity and upgradeability to be compatible with future modules.

2.10 Power Requirements

The components of the RASCS shall be able to operate with VAC: 110V/220V with a tolerance of ± 10 % and @ 50/60 Hz ± 5 %.

2.11 Software Sockets

The RASCS shall have electrical and software interface for Fluke 5700A, 5700AAN, 5700AOPT03, or similar 57x0 calibrators with data acquisition, multi-test point setup profile to calibrate automatically via IEEE-488.2.

2.12 Interconnect Cables

The RASCS shall be equipped with interconnect cables required as follow:

- Low current: shielded four conductor low thermal lead made with solid copper wire and is at least 20 AWG. Cable terminations shall be suitable with banana plug, spade lug, wire connectors.

Quantity of 40 with minimum cable length of 10 feet.

- High current: cable shall handle up to or above 1000 Amperes. Eliminate usage of ribbon cables.

Cable terminations shall consist of both round spade lug connectors and special cable for the Leeds & Northrup Current shunt. Minimum quantity of 4.

2.13 Software and Controller Requirements

The RASCS shall have Windows based software. The software will require prebuilt programs that don’t require the operator to configure any elements other than channels and basic information for calibration of the 57X0 Series calibrators, 3458A, 8508A, 8588A DMM’s, and each single value of decade box. The software shall have a built in routine for the calibration of the bridge without using external resistance standards and power supplies. The software shall provide graphic display, data acquisition, uncertainty and regression analysis; this data should be exported to Microsoft Excel. The software package shall include the support of future patches for bugs, new test instrument models support, and newer Windows compatibility for minimum of 10 years.

When RASCS is combined with air or oil bath, the software shall be capable of generating alpha-beta coefficient from measurement results. The RASCS shall have the capability to communicate with two separate controllers to simultaneously calibrate low and high resistance ranges for one operator to achieve maximum efficiency and throughput.

2.14 Temperature Controlled Air Bath

The RASCS shall have at least two automated precision air baths in order to test resistors from 18 °C through 35 °C with a temperature stability better than ±0.03 °C over 24 hour period for the entire range. The air baths shall have a capacity between 75 and 100 L. User shall be able to control and log the temperature via software and no additional equipment (e.g. temperature probe) is needed by the user to monitor the temperature inside the bath.

2.15 Temperature Controlled Fluid Bath

The RASCS shall have one automated precision oil baths in order to test resistors from 18 °C through 30 °C with temperature stability of ±0.001 °C or better. The fluid bath shall have a capacity between 75 and 100 L. User shall be able to control and log the temperature via software and no additional equipment (e.g. temperature probe) is needed by the user to monitor the temperature inside the bath.

2.16 Resistance and Shunt Standards

The following resistance standards shall be provided with Report of Calibration (ROC) provide by either NIST or ISO 17025 accredited laboratories upon delivery to the Navy Primary Standard Lab (NPSL) with following specifications or better:

Resistance Value (Ω)

Nominal Deviation

(ppm)

Stability per year

(ppm)

Temperature Coefficient At Temperature

(ppm/°C)

Quantity

0.1 10 2.5 0.05 3 1 10 2.5 0.1 3

10 10 2.5 0.1 3 100 10 2.5 0.1 3 1 k 10 2.5 0.1 3

10 k 10 2.5 0.1 3 100 k 20 2.5 0.1 3 1 M 30 5.0 0.1 3

10 M 40 10 0.2 3 100 M 50 15 0.4 3

One of each resistance standards (0.1 Ω to 100 MΩ) above shall come in one piece that is mountable and inside a temperature controlled chamber. Total quantity of 3 standard sets is required to use as NIST and Working Standards.

Shunt standards shall come with cooling fan options for high current measurements.

Shunt Value (Ω)

Nominal Deviation (ppm)

Stability per year

(ppm)

Current (A)

Quantity

0.1 100 10 15 3

0.01 100 10 100 3

0.001 100 10 300 3

0.0001 300 30 1000 3

2.17 Thermometer Readout

. The RASCS shall include two thermometer readouts with two to four inputs and two platinum resistance thermometers (PRT) per readout (four (4) PRTS in total), to obtain the equilibrium temperatures for the shunt measurements. Display measurements in °C or °F, range from 18°C - 30°C, accuracy of 0.01°C or better, temperature resolution 0.001°C. Temperature data shall be automatically logged and exported into RASCS for resistance uncertainty calculation.

2.18 Use Environment

The Calibration System Equipment shall maintain its measurement integrity under the following conditions both when in operation and out of operation:

Temperature: 71 to 75 degrees Fahrenheit

Humidity: 30 to 60 percent relative humidity

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