PD__13M-201A-VI_Secondary_Vibration_Calibration_System_and_Accelerometer.docx

Instructions to Offeror:

*Proposal shall include a System Uncertainty Budget IAW PD Sections 2.7.3.

*Proposal shall specifically address PD Section 7.5’s requirement, including overseas locations.

PD Paragraph 1 - Proposal shall be for a unit that can be upgraded, but do not include any pricing for upgrade. If any upgrades are to be done in the future they will be on a different solicitation.

13M-201A/B-VI

7 December 2012

Purchase Description for Secondary Vibration Calibration System with Reference Accelerometers

1.0 Scope: This purchase description details two parts to this acquisition: One part is a Secondary Vibration Calibration System (SVCS) where each system includes the following components: (1) Rack Mounted Desktop PC with internal Data Acquisition Card (DAC) and Function Analyzer, (1) Vibration Calibration Software, (1) Shaker with accompanying Power Amplifier and Power Supply/Pressure Regulator, (1) Internal Reference Accelerometer with Dual (or two Single) Amplifier and Signal Conditioner. In addition, the second part will be a Transfer Standard (Reference) Accelerometer, in which each will utilize an Amplifier previously mentioned. This vibration standard shall be used by the USAF PMELs to calibrate IEPE, Charge and Voltage accelerometers, sensors with voltage outputs from external signal conditioners and inductance type velocity transducers, and the system shall be upgradeable to calibrate piezoresistive and capacitive transducers. The SVCS shall conform to the applicable sections of International Organization for Standardization (ISO) 16063-21, Vibration by Comparison to a Reference Transducer, unless otherwise stated in this Purchase Description.

2.0 Performance Requirements:

2.1. Frequency Range: 5 Hz to 10 kHz

2.2. Acceleration: 0.1 to 10 g rms where g = 32.1740 ft/sec2 or 9.80665 m/sec2

2.3. Units of Measure: Acceleration (g) in ft/sec2 or m/sec2; Velocity in in/sec (ips) or m/sec at a minimum

2.4. Warm-up Time: 30 minutes

2.5. Device Under Test (DUT) Ranges:

2.5.1. Charge: 0.1 pC/g to 1000 pC/g

2.5.2. Voltage: 0.1 mV/g to 1000 mV/g

2.5.3. Velocity: 10 mV/in/sec to 1000 mV/in/sec

2.6. Broadband Resolution shall be no more than 1/50 of the SVCS resolution.

2.7. System Uncertainty:

2.7.1. For the entire Frequency Response range, the Vertical Position’s uncertainty shall be, at a minimum:

2.7.1.1. For 5 Hz to < 15 Hz, +/- 3.5%

2.7.1.2. For 15 Hz to < 50 Hz, +/- 2.5%

2.7.1.3. For 50 Hz to 2 kHz, +/-1.5 %

2.7.1.4. For > 2 kHz to 5 kHz, +/- 2.5%

2.7.1.5. For > 5 kHz to 10 kHz, +/- 3.5%

2.7.2. For the entire Frequency Response range, the Horizontal Position’s uncertainty shall be, at a minimum:

2.7.2.1. For 8 Hz to < 15 Hz, +/- 3.5%

2.7.2.2. For 15 Hz to < 50 Hz, +/- 2.5%

2.7.2.3. For 50 Hz to 2 kHz, +/-2.5 %

2.7.3. Uncertainty Budget shall be IAW ISO 16063-21 and NIST Technical Note 1297 (1994), and contain the following components: uncertainties from standards used to calibrate the SVCS and uncertainties incorporated within the SVCS test method (including mass loading corrections. Uncertainties to consider also include:

2.7.3.1. Mounting Surface Perpendicularity to axis of motion,

2.7.3.2. Base Strain Sensitivity of Reference,

2.7.3.3. Reference Sensitivity Drift (1 year),

2.7.3.4. Sensitivity of Conditioning Amplifier,

2.7.3.5. Voltage Ratio Error,

2.7.3.6. Temperature Influence,

2.7.3.7. Difference between Reference level before and after measurement,

2.7.3.8. Relative Motion Influence, including mass loading effect,

2.7.3.9. Nonlinearity of Reference Sensor,

2.7.3.10. Nonlinearity of Reference Signal Conditioner,

2.7.3.11. Nonlinearity of DUT Signal Conditioner,

2.7.3.12. Gravity Influence,

2.7.3.13. Magnetic Influence,

2.7.3.14. Distortion Influence,

2.7.3.15. Transverse Motion, Vertical,

2.7.3.15.1. For 5 Hz to 1 kHz, this shall not exceed 10%.

2.7.3.15.2. For >1 kHz to 10 kHz, this shall not exceed 30%.

2.7.3.16. Transverse Motion, Horizontal,

2.7.3.16.1. For 8 Hz to 2 kHz, this shall not exceed 50%.

2.7.3.17. Frequency Measurement,

2.7.3.18. Resolution

2.8. Calibration Interval: The complete system shall meet all requirements of paragraph 2.0, 3.0 and 4.0 without realignment for a minimum of one year.

3.0 Functional Requirements:

3.1. Operating Temperature and Humidity: 23 +/- 3 degrees C and 25 to 50% Relative Humidity

3.2. Storage Temperature: -20 to 70 degrees C

3.3. DUT Calibration Method: ISO 16063-21

3.4. User Interface: All operations of the SVCS shall be performed using simple computer commands or front panel controls on associated test equipment, with the exception of normal power-up procedures. All test equipment controls shall be labeled to indicate their functions.

3.5. Manual Control: The SVCS shall be operable in manual mode.

3.5.1. The operator shall be able to view the current (real-time) DUT and Reference values displayed on an oscilloscope-type screen within the software.

3.5.2. The operator shall be able to also view the signal-to-noise ratio, as well as the voltage level of both the reference and DUT, in real-time. In addition, the voltage shall be appropriately averaged to show the relative magnitude of the two signals.

3.5.3. The SVCS signal gain for the DUT signal channels shall be adjustable by known amounts in manual mode.

3.5.4. The shaker vibration level shall be set and adjusted in units of displacement, velocity or acceleration.

3.5.5. The frequency shall be selectable.

3.5.6. In all cases, the software shall prohibit the shaker from exceeding the vibration limits of the given shaker and amplifier, as defined elsewhere in the SVCS software.

3.6. Calibration Requirements:

3.6.1. Calibration of individual test, measurement and diagnostic equipment that makes up the SVCS shall be accomplished by comparison to external standards traceable to an international standards organization, such as NIST.

3.6.2. A statement of conformance, calibration and traceability shall be provided with each individual piece of measurement instrument that makes up an individual SVCS unit.

3.6.3. All measurement instrumentation supplied by the contractor shall be fully calibrated prior to shipment to USAF.

3.6.4. Calibration Adjustment: The design of the instrument shall readily provide accessible calibration and maintenance adjustments. All calibration adjustments shall be designed to bring back the SVCS to its ideal theoretical operational condition within certain defined limits, e.g. corrections shall not cover for a defective SVCS.

3.6.5. Calibration Accessories: All peculiar calibration fixtures and accessories needed for full calibration of the SVCS, such as plug-in extension boards, cables, special adapters, and special tools, shall be furnished with each unit delivered. These calibration fixtures and accessories shall be affixed to, or mounted within the unit, wherever possible, and their quantity held to a minimum.

3.6.6. Electrical Calibrations: All electrical calibrations of the SVCS shall be performed with normal electrical standards typically found within a calibration lab similar to or within a USAF PMEL.

4.0 Physical/Mechanical Requirements:

4.1. Power Rating: 100 to 120 VAC, 50/60 Hz, +/- 5% single phase input power.

4.2. Rack Mount shall be standard 19 inch.

4.3. Shaker

4.3.1. Material: Shaker insert shall be made of Beryllium, and coated with a nontoxic material, such as zinc, magnesium or nickel.

4.3.2. Flexure: Shaker shall be non-flexure based and without external elastic bands. Shaker may utilize non-adjustable elastic anti-rotational bands.

4.3.3. Air Bearing: Shaker shall operate via air bearing.

4.4. Shaker Mounting Surface:

4.4.1. Threading: 10-32 UNF

4.4.2. Minimum Surface Area: 30 mm diameter

4.4.3. Adapter kit shall include typical mounting adapter studs and plates.

4.4.4. Flatness shall be within 5 um.

4.4.5. Perpendicularity of mounting holes to mounting surface shall not exceed 10 um.

4.4.6. Mounting surface shall be perpendicular to axis of motion.

4.5. Shaker Shall Be Mounted to Stand in one of two ways:

4.5.1. Existing USAF Stand to Allow for Vertical and Horizontal Positioning:

4.5.1.1. Shaker shall be mounted to a Bruel & Kjaer Support Stand WA0506, which includes a Granite Block WA0507, on vibration isolation pads situated in Support Carriage WA0523.

4.5.2. As an alternative a new stand may be provided that properly supports and levels the shaker, while isolating all vibration properly and meeting all PD requirements.

4.6. Electric Isolation: System shall prevent formation of ground loops.

4.6.1. Grounding shall be designed to guarantee good ground isolation and the prevention of ground loops. The SVCS instruction manual shall include a schematic of the grounding of the SVCS for all types of DUTs.

4.7. Maximum Displacement/Stroke (peak to peak): 10 mm

4.8. DUT Maximum Mass at Maximum Levels: 100 grams at 10 g and 10 kHz

4.9. DUT Maximum Mass: 500 grams

4.10. Cabling: All necessary cabling, including low noise, coaxial, BNC and power cables, shall be supplied.

4.11. Calibration Modes: The SCVS shall include the following calibration modes:

4.11.1. Charge mode (high impedance)

4.11.2. Low impedance: either IEPE or requires constant current supply

4.11.3. Voltage Mode

4.11.4. Velocity Pickup (voltage output) with an input impedence of 10 kohm, 20 kohm, 1 megaohm and 2 megaohms.

4.12. Internal and Transfer Reference Accelerometer Requirements:

4.12.1. Item shall be Welded, Hermetically Sealed.

4.12.2. Operating Frequency Range: 5 Hz to 10 kHz

4.12.3. Reference Frequency: 100 Hz

4.12.4. IEPE Type

4.12.5. 10 or 100 mV/g Nominal Reference Sensitivity

4.12.6. 10-32 UNF

4.12.7. Transverse Sensitivity: <= 5% over Operating Frequency Range

4.12.8. Linearity <= 1% FS, least squares method over entire range

5.0 Controller Requirements:

5.1. A rack mounted desktop controller is required that can efficiently operate under the Microsoft 7 Professional operating system.

5.2. All major components of the system must be commercially available and fully supportable by commercial sources. Where specific brands are identified in this specification, no substitutes are allowed without prior approval from the Government. The Controller must meet or exceed Windows 7 Professional hardware requirements.

5.3. Salient Characteristics:

5.3.1. Printer: A color laser printer with at least 720 dpi resolution.

5.3.2. Processor: Intel Pentium IV or otherwise equivalent or better generation, 1 GHz clock speed minimum.

5.3.3. Memory: Minimum 4 GB system Memory.

5.3.4. Input Output (I/O) External Ports, Slots and Connectors: At minimum, the following types of I/O interface connections must be available on the controller or via port replication:

5.3.4.1. USB: Minimum of four integrated USB Ver 2.0 compliant ports.

5.3.4.2. Ethernet: One 100/1000 BaseT Ethernet RJ45 port.

5.3.4.3. Video: Areo-Capable Graphics card that supports Windows Display Driver (WDDM 1.0) with a minimum of 128 MB.

5.3.4.4. Display Panel: Minimum 15-inch LCD Color Display Panel with at least 1024 x 768 resolution for a 4:3 aspect ratio or 14.1-inch flat panel LCD Color Display Panel with at least 1280 x 720 resolution for a 16:9 aspect ratio.

5.3.4.5. Hard Drive: 80 GB (Minimum) Hard Disk Drive.

5.3.4.6. DVD-ROM/CD-RW Drive: DVD-R: at least 8X Speed. CD-RW: at least 24X Read Speed, 16x Write Speed

5.3.4.7. Operating System and Software: All software must run under Microsoft Windows 7 Professional as a non-elevated user.

5.3.4.8. Additional Hardware: Additional hardware required to make this system function as identified by this purchase description shall be provided.

5.4. Licensing:

5.4.1. Contractor shall provide sufficient application software licenses to support each unit.

5.4.2. All software provided under this contract shall be at the same version, revision and revision date at the completion of the contract.

5.5. Software Warranty: The contractor shall warrant that the software product meets this purchase description and is free from defects in design and operation and will perform to stated specifications from the date of shipment of the item from the manufacturer's facility to the point of destination as indicated in the contract. The contractor's Commercial Warranty or Addendum shall include verbiage to ensure the requirements in this PD are satisfied. All other clauses of the contractor's warranty shall remain in effect unless they contradict the requirements stated below.

5.6. Software Maintenance:

5.6.1. Maintenance Agreement: Software Maintenance/Support Agreement and Warranty shall be provided for the same length as each unit’s accompanying warranty.

5.6.1.1. Agreement shall include:

5.6.1.1.1. Software patches, fixes, version updates and major revisions that provide corrections to problems, added functionality and/or performance improvements that can be applied to all licenses.

5.6.1.1.2. The contractor shall include technical support at no additional charge for normal software usage, clarification of documentation and resolution of software problems. The contractor shall have multiple methods for convenient contact of Technical Support. Contact methods may include but are not limited to: online, and telephone.

5.6.1.1.3. The contractor shall provide periodic updates to the software for incorporating standard enhancements to the commercial product and/or correction of substantial software defects. Software updates shall be coordinated through AFMETCAL prior to distribution to the regional PMEL suppliers to assure Air Force configuration control.

5.6.2. AFMETCAL will provide the contractor a single point interface for the Software configuration management, distribution and maintenance issues.

6.0 Instructional/Owner’s Manual shall include the following in addition to the requirements stated in the DD1423 CDRLs and TM8601:

6.1. Operation of system including startup and setup.

6.2. How DUTs are connected to the SVCS.

6.3. How DUT characteristics are entered into setup/software.

6.4. How test measurements are setup in software.

6.5. System maintenance and troubleshooting techniques.

6.6. Calibration procedures for future calibration of SVCS.

6.7. Schematic of the grounding of the SVCS for all types of DUTs.

7.0 Training and Installation Requirements:

7.1. Training shall cover all portions of the Owner’s Manual.

7.2. Instruction on the use of all software functions and menus.

7.3. Instruction and complete hands-on calibration of two different types of accelerometers and velocity pickups of the user’s choice.

7.4. Instruction of system maintenance and troubleshooting techniques.

7.5. Training and installation shall take place at each customer’s (unit destination’s) premises, including some overseas locations.

7.6. Upon completion of installation, on-site training shall be available for no less than 8 hours.

8.0 Testing Requirements: Installation and system operation overview by the contractor shall take place at the customer’s (PMEL’s) premises. The contractor shall spend a minimum of two days on site. The SVCS will be inspected and accepted at a destination specified elsewhere in this contract. The item will be checked with test equipment and parameters equal to or better than those required assuring specified performance requirements are met. Test equipment has first echelon certification directly traceable to the National Institute of Standards and Technology (NIST) or other AFMETCAL approved NMI where required. Test will be performed to assure the SVCS meets or exceeds all of the requirements of this purchase description. Such testing does not relieve the contractor of performing all inspections and quality control checks at the point of fabrication as necessary to assure performance as specified.