Portable Vibration Calibrator, CSS 06-3219.docx

PPs CALIBRATION STANDARD SPECIFICATION CSS 06-3219

CSS 06-3219

CALIBRATION STANDARDS SPECIFICATION PROCUREMENt PACKAGE portable vibration calibrator

DEPARTMENT OF THE NAVY

METROLOGY AND CALIBRATION PROGRAM

December 2019

CALIBRATION STANDARDS SPECIFICATION PROCUREMENT PACKAGE

Portable Vibration Calibrator

Prepared by:

Physical/Mechanical Standards (MS 33) Measurement Science Department Naval Surface Warfare Center, Corona Division P.O. Box 5000 Corona, CA 91718-5000

DEPARTMENT OF THE NAVY

METROLOGY AND CALIBRATION PROGRAM

Table of Contents

pps CALIBRATION STANDARD SPECIFICATION CSS 06-3219

1.0 SCOPE

1.1 General. This calibration standards specification (CSS) specifies the minimum requirements for a Portable Vibration Calibrator (PVC). The PVC is intended to be used by Navy and Marine Corps personnel in shipboard and shore-based laboratories and on-site, in-place calibration of vibration measuring sensors and indicating equipment. The PVC shall be capable of generating and measuring vibration levels in units of acceleration, velocity and displacement over a wide range that extends from 10 Hz to 10K Hz. The anticipated system shall be a portable box solution with a maximum weight of 35 lbs. The system shall include accessory items; cables, cable adapters, vibration sensor mounting hardware and adapters to enable mounting, monitoring and measuring of accelerometer and velocity sensors electrical signal output as described in this CSS.

1.2 Usage. Equipment covered by this CSS is intended for use in testing equipment and systems in the worldwide natural and controlled environments in which Military equipment is operated. Equipment will also be subjected to operational conditions aboard land, sea and air vehicles, both military and commercial during periods of operation, transportation and storage. The requirements of this CSS are tailored for the intended use of the equipment. Specific requirements of MIL-PRF-28800F, identified and or modified in this CSS, are invoked according to the class of equipment.

1.3 Classification. Test equipment specified herein is categorized by class, (requirements arising from the intended operational environment), as specified below in 1.3.1 Class through 1.3.3 Color. The class is assigned by the most severe environmental condition expected for the equipment

1.3.1 Class. The PVC shall conform to Class 3 requirements in accordance with MIL-PRF-28800F for Navy shipboard and shore-based laboratory use as specified in this CSS.

1.3.2 Enclosure. For the purpose of this CSS, the enclosure refers to the equipment housing/case for each major component. Examples of major components include; vibration standard, accessory case. The enclosure and or enclosure cover may contain provisions for electrical power cords, vibration cable connectors, mounting hardware and adapters and operator’s manual. The enclosure shall also serve as the transit case and provide protection for the individual system component during storage, shipping, handling, and use.

1.3.3 Color. The color of the equipment and the transit cases shall be the color normally provided by the manufacturer; however, they must NOT be green, magenta, or red.

2.0 APPLICABLE DOCUMENTS

2.1 Reference documents. The following documents form a part of this specification to the extent specified herein. Unless otherwise indicated, the issues of these documents shall be those in effect on the date of this solicitation.

DEPARTMENT OF DEFENSE specifications MIL-PRF-28800F - Test Equipment for use with Electrical and Electronic Equipment, General Specification for (Copies of DoD specifications are available online at http://quicksearch.dla.mil/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.)

DEPARTMENT OF DEFENSE STANDARDS

MIL-STD-130 - Standard Practice of Identification Marking of U.S. Military Property (Copies of DoD Standards are available online at http://quicksearch.dla.mil/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.)

NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY

NIST Special Publication 811 - Guide for the Use of the International System of Units (SI) (Copies of NIST documents are available online at http://physics.nist.gov/cuu/pdf/sp811.pdf or Standards Information Center, 100 Bureau Drive, Stop 2100 Gaithersburg, MD 20899-2100 or Email: ncsci@nist.gov Phone: (301) 975-4040.)

American National Standards Institute (ANSI)

(Copies of ANSI documents are available from http://webstore.ansi.org/ or ANSI Attn: Customer Service Department, 25 W 43rd Street, 4th Floor, New York, NY, 10036 institute of electrical and electronics engineers (ieee) IEEE 260.1 - IEEE Standard Letter Symbols for Units of Measurement (SI Units, Customary Inch-Pound Units, and Certain Other Units) (Copies of IEEE documents are available from http://www.ieee.org or IEEE Service Center, 445 Hoes Lane, Piscataway, NJ 08854-1331.)

International Electrotechnical Commission (IEC) IEC 61010-1 - Safety Requirements for Electrical Equipment for Measurement, Control and Laboratory Use (General Requirements) (Copies of IEC documents are available online at http://www.iec.ch/ or EC publications are available in the US from the Sales Department. American National Standards Institute, 11 West 42nd Street,113 Floor, New York, NY 10036, USA.)

International Organization for Standardization (ISO) ISO 7779 - Measurement of Airborne Noise Emitted by Information Technology and Telecommunications Equipment (Copies of ISO documents are available online at http://www.iso.org/iso/home.html or International Organization for Standardization (ISO) 1, ch. de la Voie-Creuse, Case postale 56, CH-1211 Geneva 20, Switzerland) Standard commands for programmable instruments (SCPI) consortium SCPI Volume I -1999 - Standard Commands for Programmable Instruments (SCPI) (Copies of SCPI documents are available online at http://www.ivifoundation.org or IVI Foundation Corporate Office, PO Box 1016, Niwot, CO 80544-1016.)

2.2 Order of precedence. In the event of conflict between the text of this CSS and the references cited herein, the text of this specification shall take precedence. Nothing in this CSS, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.

3.0 REQUIREMENTS

3.1 Safety. The equipment shall comply with the safety requirements of IEC 61010-1. For safety ground all accessible surfaces of the equipment shall be at ground potential. The power cable shall include a safety ground conductor. This is also true of drawer assemblies; disconnecting the safety ground shall also disconnect the power conductors

3.2 Equipment components. Parts, materials, and process shall be as specified below in 3.2.1 Interchangeability through 3.2.2.3 Combination of materials and shall permit the equipment to comply with the requirements of this CSS.

3.2.1 Interchangeability. A model number shall be designated for all units provided. All units and the replaceable assemblies, subassemblies, and parts comprising the unit shall be interchangeable on a noninterference basis.

3.2.2 Restricted materials. Restricted materials shall be as specified below in 3.2.2.1 Material restricted for Navy use through 3.2.2.3 Combination of materials.

3.2.2.1 Material restricted for Navy use. The materials and parts specified in a through c shall not be used in equipment for the Navy unless otherwise specified. An exception is made for small lithium batteries used for memory backup as specified below in 3.5.1.2.2.2 Lithium batteries for lithium battery types approved for use.

Mercury, including mercury batteries Radioactive material Lithium electrochemical cells

3.2.2.2 Other restricted materials and gases. Test equipment shall not contain materials that promote the premature failure of the equipment or that present a health hazard under normal use or storage conditions as specified below in 3.2.2.2.1 Organic materials through 3.2.2.2.5 Helium.

3.2.2.2.1 Organic materials. Test equipment shall not contain materials prone to organic decay or that act as a nutrient for the growth of multicelled organisms.

3.2.2.2.2 Flammable materials. Test equipment shall not contain materials that ignite into flames at operating or storage temperatures.

3.2.2.2.3 Explosive materials. Test equipment shall not contain materials that explode at operating or storage temperatures.

3.2.2.2.4 Carcinogens. Certain chemicals have been identified in the Occupational Safety And Health Act (OSHA) as cancer-producing substances (carcinogens). Before using any materials that might contain these chemicals, the materials shall be evaluated in accordance with 3.1 Safety.

3.2.2.2.5 Helium. Helium shall not be used as pressurizing gas in sealed units containing electron tubes. When necessary to use helium for leak detection purposes, exposure shall be limited to the time necessary for the test, followed by thorough purging.

3.2.2.3 Combination of materials. The equipment shall contain no combination of materials that cause deterioration of any material contained in the equipment due to the effects of outgassing.

3.3 Design and construction. The test equipment shall be designed and constructed to permit compliance with all applicable requirements of its class as defined in this CSS, as well as the performance, accuracy, and other requirements in this CSS.

3.3.1 Operator adjustments and controls. Operator adjustments and controls shall be as specified below in 3.3.1.1 Operator adjustments and 3.3.1.2 Operator controls.

3.3.1.1 Operator adjustments. The equipment shall include built-in adjustments or compensating devices for any function or parameter that would exceed the specified tolerance within the calibration interval defined in 3.11.1 Calibration interval. Under all specified service conditions, the variation of any adjustment or control shall produce the desired control action to bring the equipment within tolerance.

3.3.1.2 Operator controls. Operating controls and indicators shall be readily accessible to the operator from the control panel of the equipment. The readings presented on the controls and indicators shall be available to the operator without conversion or calculation.

3.3.2 Connectors, electric. Provision shall be made to ensure that connectors will be mated only with the appropriate counterparts. Where design considerations require close proximity of connectors of similar configuration, the mating connectors shall be suitably coded or marked. The live or hot side of unmated connectors shall be protected against shorting.

3.3.3 Wiring, internal. Internal wiring practices shall be such that the wiring shall not be damaged during normal maintenance and calibration.

3.3.4 Internal cooling. The equipment shall be capable of operating without interruption for at least 24 hours at the maximum operating temperature as specified in this CSS without overheating, losing power or otherwise exhibiting failure.

3.3.4.1 Cooling devices. Cooling devices used in the equipment shall be an integral part of the equipment and not degrade any aspect of performance or safety.

3.3.5 Front panel display indicators. Front panel/control panel display indicators designed to present change-of-state information to the operator shall be distinguishable at a distance of 1 meter with provisions to be distinguishable outdoors in direct sunlight and in a minimum light level of 1 foot-candles (fc). All display indicators shall be discernible at viewing angles from 0 degrees to 45 degrees.

3.3.6 Self-test capability. The PVC shall perform an automatic diagnostic self-test at startup and determine operational readiness

3.4 Digital interface. A digital interface shall be provided and shall meet the requirements as specified below in 3.4.1 Digital interface requirements. The digital interface shall include a USB connection conforming to the Universal Serial Bus Specification (USB).

3.4.1 Digital interface requirements. The digital interface shall have the programmable capability to control the various PVC functions including all ranges, modes, and levels. The digital interface shall support control of the device without the need for any proprietary drivers or software. The syntax and style of programming commands shall conform to the Standard Commands for Programmable Instruments (SCPI). Primary power control and other non-measurement functions need not be controllable through the digital interface.

3.5 Electrical power sources and connections. The electrical power sources and connections shall be as specified below in 3.5.1 Electrical power source and 3.5.2 Electrical power connections.

3.5.1 Electrical power source. The equipment shall operate from the input power conditions specified in 3.5.1.1 Power consumption through 3.5.1.2.1 Interruption of power source.

3.5.1.1 Power consumption. The maximum power for operation of a PVC system component that requires an external single phase 120 Vrms power source shall not exceed 1200 watts.

3.5.1.2 Nominal and alternate power source. The equipment shall include an internal rechargeable battery with battery charger that will operate at the nominal values for voltage and frequency as specified in a and b below.

The nominal voltage shall be 120 Vrms The nominal frequencies shall be single phase 50 Hz and 60 Hz

3.5.1.2.1 Interruption of power source. Voltage or frequency interruptions shall not cause damage to the equipment. A power source interruption is when the voltage falls in the range of 0 to 70% of nominal or frequency falls in the range of 0 to 90% of nominal. Equipment performance is not required during interruption of the power source. After power interruptions of any duration, the equipment shall automatically resume operation at either the last operating condition before interruption, or a default power-up condition.

3.5.1.2.2 Battery. The internal battery shall be a spill proof sealed solid gel or absorbent glass mat type battery with a minimum capacity of 4 amp-hour. The PVC shall not require recalibration as a result of battery replacement.

3.5.1.2.2.1 Battery restrictions. For Navy applications, the use of lithium and mercury batteries is restricted and shall not be used in equipment unless specifically required and approved by the procuring Navy activity. If a restricted type of battery is approved, technical manuals shall reference substitute battery types, and all necessary modifications to use the substitute batteries. An exception is made for small lithium batteries used for memory backup as specified below in 3.5.1.2.2.2 Lithium batteries. The Equipment shall incorporate safety precautions of UL1950 and a label containing the following caution and information shall be affixed to the outside of the unit, as applicable for either lithium or mercury batteries:

THIS UNIT CONTAINS MERCURY BATTERIES

Battery Manufacturer:

Battery Part Number:

THIS UNIT CONTAINS LITHIUM BATTERIES

Battery Manufacturer:

Battery Part Number:

3.5.1.2.2.2 Lithium batteries. Commercial UL approved equipment that contains lithium batteries (size double A or button cell type) used for memory backup are approved for use under a general blanket approval waiver. Lithium or re-chargeable batteries larger than the type specified above requires a separate approval. Tadiran liquid cathode batteries, SO2 (sulfur dioxide) batteries or lithium vinyl chloride “liquid cathode” batteries are strictly prohibited. For the purpose of this specification, a lithium (size double A or button cell type) battery as described above is approved.

3.5.2 Electrical power connections. The requirements specified in 3.5.2.1 Input power cable through 3.5.2.4 Indicators shall apply to the equipment. The equipment shall operate with a ground at the primary power.

3.5.2.1 Input power cable. The input power cable shall be a detachable power cable provided by the manufacturer.

3.5.2.2 Input power switch. The operator shall be able to energize the equipment from the front panel. A standby capability may be incorporated to activate and deactivate the equipment. If such a capability is provided, suitable warnings shall be placed in the operating and service manuals and on the equipment to warn the operator of possible shock hazards during servicing, due to partially activated power supplies.

3.5.2.3 Excessive current drain protection. An automated safety mechanism (circuit breaker/fuse) shall be incorporated to automatically disconnect the equipment in the event of current being drawn that is in excess of the equipment rating. Safety breaker or fuse shall be implemented on the input power line side (minimum) with external access to the breaker or fuse.

3.5.2.4 Indicators. Visual indication shall be provided on the front panel to indicate when the equipment is energized.

3.6 Enclosure physical characteristics. The physical characteristics of the equipment shall be as specified in 3.6.1 Dimensions through 3.6.4.9 Pressure equalizing valve.

3.6.1 Dimensions. Maximum dimensions of the PVC major components; vibration indicator, accessory case, including handles and covers, shall not exceed 14 x 14 x 14 inches.

3.6.2 Weight. The weight of any PVC main component including the enclosure cover and any contained accessories shall not exceed 35 pounds.

3.6.3 Enclosure attitude. Equipment shall be mechanically stable when positioned in its normal attitude on a bench for viewing of the front panel. The size and weight limitations of 3.6.1 Dimensions and 3.6.2 Weight apply to this requirement.

3.6.4 Enclosure requirements. The PVC enclosure shall be as specified in 3.6.4.1 Cover through 3.6.4.9 pressure equalizing valve.

3.6.4.1 Cover. The enclosure shall have a cover. The enclosure and cover interface shall have a gasket or offset lap seam to prevent entry of dirt or spray-type moisture or contaminates during shipping or storage.

3.6.4.2 Latches. There shall be a maximum of 6 latches per enclosure. The latches shall incorporate a quick-opening mechanism.

3.6.4.3 Stacking provisions. Equipment enclosures shall have a geometric configuration that permits stacking without harm to the enclosure or its contents. The stacking height shall be 4 units.

3.6.4.4 Handles. The enclosure shall have one or more handles. The number and location of handles shall be such that the load distribution per handle shall not exceed 35 lbs. Handles shall be located above the equipment center of gravity to ensure carrying stability. Handles shall permit compliance with the enclosure attitude provisions specified above in 3.6.3 Enclosure attitude and 3.6.4.3 Stacking provisions.

3.6.4.5 Accessory stowage. Enclosures that have provisions for stowage of accessories, shall not adversely affect the carrying stability of the equipment and shall be contained in a manner that prevents damage to the accessories or equipment during transit.

3.6.4.6 Corners. All corners shall be designed to preclude injury to personnel or damage to material. All corners shall be adequately reinforced to protect the instrument from damage during shipping, handling and storage.

3.6.4.7 Connections and controls. All external electrical connections (including power connections) and operating controls shall be on the control panel.

3.6.4.8 Chassis fasteners. The chassis shall be securely fastened within the enclosure conforming to the maintainability requirements of 3.10.3 Maintenance provisions.

3.6.4.9 Pressure equalizing valve. A mechanism for equalizing air pressure within the enclosure with the external ambient pressure, when the enclosure is sealed, shall be provided.

3.7 Marking and identification. Marking and identification of test equipment shall be as specified below in 3.7.1 Marking through 3.7.2 Equipment identification.

3.7.1 Marking. Test equipment shall be marked in a manner that does not adversely affect safety or performance.

3.7.1.1 Reference designations. Reference designations shall be used to identify each part for its particular circuit application. Subminiaturized and non-repairable assemblies need not be marked with reference designations. Reference designator usage shall be in accordance with ANSI Y32.2 and ANSI Y32.16.

3.7.1.2 Warning markings. Warning markings shall warn of the location, the nature, and the extent of a hazard. Letters of warning markings shall be of clearly legible gothic capitals. Warning markings shall have high contrast between the letter and background colors. The markings shall be as permanent as normal life expectancy of the test equipment, and located as close as possible to the point of danger. Warning markings indicating circuits of more than 500 Vdc or Vrms shall read:

DANGER HIGH VOLTAGE (maximum applicable voltage) VOLTS Markings shall be in accordance with the requirements of ANSI/ISA-S82.02.01-1999, which requires the warning and caution markings specified in a through c:

The precautionary signal word shall be at least 2.5 mm high.

The text shall be at least 1.5 mm high and contrasting in color to background.

If molded or stamped in a material, text shall be at least 2.0 mm high and, if not contrasting in color, a depth or raised height of at least 0.5 mm.

3.7.1.3 Battery warning label. Equipment containing batteries shall be provided with a battery warning label attached to the equipment. Battery warning labels shall provide instruction on shipment and long term storage as specified below:

WARNING

Storage:

Shipment:

3.7.1.4 Panel markings and processes. Panel markings shall enable the operator to identify the functions and use of all items requiring operator intervention

3.7.2 Equipment identification. All equipment, excluding small accessory items contained within a reusable pouch or container, shall be identified with the items specified in a through d.

Manufacture name Equipment model number with installed options Equipment nomenclature Serial number

3.7.2.1 Identification plate. An equipment identification plate shall be affixed to the test equipment enclosure when the enclosure also serves as the transit case. The identification plate shall contain the information provided below in 3.7.2.1.1 Identification plate, multiple cases. The identification plate shall be permanently affixed.

3.7.2.1.1 Identification plate, multiple cases. The identification plate shall contain the information provided in a through g.

Configuration model number Configuration nomenclature Configuration CAGE Case X of Y Component nomenclature Component part number Component serial number

3.7.2.1.2 Identification plate, supplemental. When accessories are required to meet the requirements of the CSS and the combination is given a part or model number designation that differs from that of the main unit, there shall be a supplemental identification plate containing the information in a and b. The plate shall be placed on the accessory container, as applicable. Whether or not a configuration model designation is assigned to the accessory or group of accessories, all major accessories shall be marked as in c:

1. Model configuration number: (Model number assigned to the equipment configuration).

Consists of: [part number of all components (excluding cables and adapters) comprising the equipment configuration].

Part of (or p/o): (Model number assigned to the equipment configuration, or main unit model number, as applicable), s/n: (serial number assigned to the equipment comprising the set or the serial number of the primary instrument if a separate s/n is not assigned to the set).

3.7.2.1.3 Identification plate, transit case. The equipment transit case and enclosure, when serving as a transit case, shall be provided with an identification plate that is permanently affixed. An acceptable method of attachment is to use 1/8” diameter solid or semi-tubular rivets and backup washers. The identification plate shall be as specified below in 3.7.2.1.4 Identification plate, material through 3.7.2.1.5 Identification plate, marking.

3.7.2.1.4 Identification plate, material. The following materials with minimum thickness of 1/32 inch are recommended.

Brass Corrosion resistant steel Aluminum alloy

3.7.2.1.5 Identification plate, marking. The plate background color shall be black. It shall have a minimum character size of 1/8 inch. All characters shall be permanent using best commercial practices for laser engraving, etching, or photosensitive marking of material.

3.7.2.2 Reusable pouch or container. If a reusable pouch or container is provided, containers shall be marked "accessories for use with" (test equipment nomenclature or model number), or, "maintenance aids for use with" (test equipment nomenclature or model number), as applicable.

3.7.2.3 Item unique identification (IUID). A two dimensional Unique Identification (IUID) data matrix conforming to MIL-STD-130 shall be included on the Identification Plate.

UID Data Elements. The following is required per DFARS clause 252.211-7003, Paragraph 4(e):

• UID Type

• Issuing Agency Code

• UID Data Element

• Enterprise ID

• Original Part Number

• Serial Number

• Quantity Shipped

• Unit of Measure

• Description

• Unit Acquisition Cost

• Current Part Number Effective Date

• Current Part Number

3.8 Environmental requirements. The PVC environmental performance requirements shall be as specified below in 3.8.1 Warm-up through 3.8.9 Acoustic noise. It shall conform to the specified performance when subjected to the environmental conditions of this specification.

3.8.1 Warm-up. The PVC shall comply with the specified performance requirements after a 20-minute warm-up period preceded by a 2-hour not operating temperature stabilization period. PVC shall indicate operational readiness.

3.8.2 Temperature and humidity. The temperature ranges and humidity limits for both operating and not operating conditions shall be as specified in 3.8.2.1 Temperature not operating through 3.8.2.3 Humidity.

3.8.2.1 Temperature not operating. The PVC shall conform to the specified performance and accuracy requirements after being stored in a dry condition at temperatures ranging from -30 ºC to 70 ºC.

3.8.2.2 Temperature operating. The PVC shall conform to the specified performance and accuracy while being operated in ambient temperatures over the range of 0ºC to 50 ºC inclusive.

3.8.2.3 Humidity. The PVC shall conform to the specified performance and accuracy for conditions where the relative humidity and temperature is as specified in a and b below. At temperatures below 10 ºC, the humidity is uncontrolled, but the equipment shall conform to the specified performance (after the specified warm-up period) and shall withstand the effects of humidity up to 100 percent non-condensing.

a) 5 to 95±5 percent in the temperature range of 10 to 30 ºC.

b) 5 to 75+5 percent in the temperature range of 30 to 40 degrees ºC

3.8.3 Altitude. The PVC components shall conform to the specified performance and accuracy requirements after being subjected to an altitude of 15,000 feet for 1 hour with equipment not operating as specified in MIL-PRF-28800F paragraph 3.8.3 Altitude. Equipment need not be operational at 15,000 feet.

3.8.4 Bench handling. The PVC shall conform to the specified performance and accuracy requirements and there shall be no damage to any controls, indicators, or fuse holders, after being tested in accordance with MIL-PRF-28800F paragraph 4.5.5.4.3 Bench handling test.

3.8.5 Water resistance. The PVC enclosure and cover shall provide a water resistant barrier to protect the internal components when exposed to rain.

3.8.6 Fungus resistance. Equipment shall not contain materials that provide nutrients for the growth of fungus.

3.8.7 Salt atmosphere. Equipment component surfaces exposed to atmosphere shall have an anti-corrosion treatment to provide corrosion protection.

3.8.8 Dust exposure. Equipment enclosure with cover shall provide protection for the PVC from dust exposure.

3.8.9 Acoustic noise. The PVC shall not generate acoustic noise in excess of 80 dBA sound vibration level (SPL) when measured at the operator position, in accordance with ISO 7779.

3.9 Performance requirements. The PVC performance requirements shall be as specified here and meet the requirements in 3.9.1 Range and accuracy through 3.9.3.4 Vibration sensor cables, connectors and adapters. The PVC system shall be a Portable Vibration Calibrator with menu driven graphical user interface capable of operating on internal battery power for a minimum of 8 hours. The PVC shall be capable of calibrating both charge (Pico-coulomb/g) and voltage (milli-volt/g) output accelerometers over the frequency range of 10 Hz to 10K Hz. It shall also be capable of calibrating velocity transducers (milli-volt/inch/second) over the range of 45 Hz to 1500 Hz.

3.9.1 Range and accuracy. The PVC system shall be capable of measuring vibration over the range and within the uncertainty specified in a and b. The uncertainty shall be expressed as a percent of indicated value (iv). The uncertainty shall have a level of confidence of 95 percent. The uncertainty shall be calculated as a root-sum of squares (RSS) of the standard uncertainties of all the error contributors to the measurement system and processes, with an expanded coverage factor of 2 (K=2). The accuracy shall be traceable to NIST.

Acceleration: frequency range, 10 Hz to 10 kHz; amplitude range, 0 to 20 G; uncertainty, ±3% of indicated value.

Velocity: frequency range, 45 Hz to 1500 Hz; amplitude range, 0 to 12 in/sec; uncertainty, ±3% of indicated value.

3.9.2 Units of measure. The PVC shall, at a minimum, be capable of operating/displaying the vibration measurement units in the table below in both Peak and RMS values. Software shall allow dynamic conversion of vibration units displayed. Unit conversion shall be in accordance with NIST Special Publication 811. Symbols shall be in accordance with IEEE 260.1.

Acceleration pk and RMS Velocity pk and RMS Displacement pk to pk

μA/g

3.9.3 Operating characteristics and components. The PVC operating characteristics and components shall be as specified in 3.9.3.1 Vibration indicator through 3.9.3.4 Vibration sensor cables, connectors, adapter.

3.9.3.1 Vibration indicator. The PVC shall, at a minimum, be capable of the following in a through g below.

a. The PVC shall be able to display measurement units of frequency, acceleration, velocity and displacement

b. The PVC shall allow the operator to select the measurement units.

c. The PVC shall automatically calculate the sensitivity of the unit under test.

d. The PVC shall include a built-in charge amplifier for charge accelerometers and a built-in current source for powering ICP accelerometers

e. The PVC shall not require the operator to input the mass of the unit under test

f. The PVC shall maintain the set acceleration level with a change in frequency

g. The PVC shall indicate pass or fail condition of the unit under test

3.9.3.2 Accessories. The PVC shall, at a minimum, have the accessories below in 3.9.3.3 Accessory case through 3.9.3.4 Vibration sensor cables, connectors, adapters as well as any other accessory required for the PVC to meet the requirements of this CSS.

3.9.3.3 Accessory case. The accessory case shall also serve as the transit case. Transit case and internal foam/packing material shall be impervious to water and hydrocarbon base fluids. It shall contain accessories and maintenance aids for the PVC system i.e., vibration sensor cables, connectors and adapters. Accessories shall be contained in foam/packing material cutouts to prevent damage during transit. Small accessories shall be contained within reusable containers.

3.9.3.4 Vibration sensor cables, connectors, adapters. Vibration sensor cables, connectors and mounting adapters shall be provided with the PVC to connect and measure the sensitivity of the vibration sensor models listed in the table below.

3.10 Maintainability. Maintainability shall be as specified below in 3.10.1 Fault isolation through 3.10.3 Maintenance provisions.

3.10.1 Fault isolation. The design of the equipment shall permit isolation of faults, and repair down to the component item or lowest replaceable unit (LRU) with the maintenance provisions furnished. Refer to MIL-PRF-28800F paragraph 6.5.2.18 Non-repairable subassembly for a definition of a non-repairable subassembly.

3.10.2 Preventive maintenance. Preventive maintenance, excluding calibration, shall not require more than 15 minutes per 30-day period. Preventive maintenance shall not require breaking of the equipment seams where calibration seals would normally be placed.

3.10.3 Maintenance provisions. Equipment shall be as specified in a through c to facilitate maintenance as specified in MIL-PRF-28800 paragraph 3.14.3 Maintenance provisions.

1. Accessibility for maintenance. The equipment shall be designed to ensure that any necessary maintenance access can be accomplished utilizing ordinary tools. The equipment shall be constructed so that no damage to any component shall occur and no permanent distortion to any structural member shall be caused during maintenance and calibration.

Accessibility for repair. The equipment shall be designed so that LRU’s can be removed without removing other hardwired subassemblies or components. There shall be no need to unsolder cables or interconnecting wiring to remove printed circuit cards. Assemblies designed primarily to distribute power and signals to other components are excluded from this requirement. When troubleshooting or repair information is provided and access to both sides of a repairable assembly is necessary, the design of the equipment shall facilitate this directly or through extender cards.

Calibration/alignment. The PVC shall be provided with all necessary instructions, firm and hardware needed to calibrate and align the equipment so that the equipment meets its performance specifications after repair or due to the equipment failing calibration.

3.10.4 Repair. Maintenance instructions shall be furnished to facilitate the replacement of LRU’s and subsequent testing procedures to ensure the performance of the equipment or the repair action taken. (See MIL-PRF-28800 paragraph 6.5.2.18 Non-repairable subassembly for guidance when a subassembly may be deemed non-repairable to aid in the identification of LRU’s that can be repaired/replaced.)

3.10.5 Firmware updates. The equipment shall be designed to allow for the Navy to update the equipment firmware. For the length of the contract and any subsequent warranty period beyond the length of the contract, the manufacturer shall provide to the Navy notification of any firmware updates, instructions on how to perform the update, and free access via appropriate media transfer method supported by the Navy (e.g. ROM disc, Website, email) to firmware updates that fix bugs relating to any of the performance requirements cited in this specification. For the same time period, the manufacturer shall provide to the Navy notification of any improvements relating to any performance requirements cited in this specification. The firmware update process shall use any common interface path supported by the equipment (e.g. the USB DVD-ROM drive available with the device).

3.11 Calibration. For the purpose of this CSS, calibration refers to the process of comparing a test instrument with a calibration standard to determine the indicated error at specified test points. Alignment refers to the process of characterizing and adjusting a test instrument to cause it to indicate within its specified accuracy limits.

3.11.1 Calibration interval. The minimum interval between calibrations shall be 12 months. At the end of this interval, a minimum of 85 percent of the units shall remain in tolerance.

3.12 Reliability. The design of the equipment shall be such that under normal use and operation the equipment does not fail within one year or 1500 hours of operation, whichever comes first, with a statistical certainty of 95%. The manufacturer shall provide a summary of maintenance or warranty records to establish the validity of the statistical assertion. If records of the actual equipment model offered are not available, records from a similar model may be substituted. The manufacturer shall be able to reasonably establish the claim that the offered equipment shall provide reliability similar to the model used to provide substitute records.

3.13 Workmanship. The manufacture, assembly and packaging of the items covered by this CSS shall conform to the requirements of this CSS. All items will remain securely held in place during normal transit. Adequate protection will be afforded for the equipment on all sides to avoid transient damage.

4.0 VERIFICATION

4.1 First article. For the purpose of this CSS, First article refers to; preproduction model, initial production sample, test sample, or pilot model that is representative of equipment specified by the requirements of this solicitation.

4.2 First article test sequence. First article tests will be performed at the manufacturers facility utilizing a government approved first article test plan as specified in this solicitation. Government verification testing will commence after first articles have passed test and a first article test report has been issued (see 4.4.4).

4.3 First article testing. The first article shall consist of two units with accessories and instruction manuals. The two units with accessories and instruction manual shall be inspected and tested to ensure conformance with the requirements advertised in this solicitation. Clear and concise test results showing how the reliability and maintainability characteristics of the equipment comply with the requirements of the solicitation shall be presented. If readjustment of the equipment is anticipated at the conclusion of any environmental test and prior to the resumption of environmental testing, the rationale for readjustment should identify the environmental tests that should be followed by such readjustment. First article examinations and tests are classified into groups in accordance with MIL-PRF-28800F Table 7 and as specified in 4.3.1 First article inspection and tests, Group A through 4.3.5 First article tests, Group F. The test methods, procedures, and conditions used for inspection shall be performed on the units as specified below in 4.4 Examinations and test methods.

4.3.1 First article inspection and tests, Group A. The two units presented for First article inspection shall be subjected to the Group A tests specified in 4.3.1.1 First article preoperational inspection through 4.3.1.2 First article level A performance tests.

4.3.1.1 First article preoperational inspection. Prior to the beginning of the Level A performance test, the preoperational inspection specified in a and b shall be performed on all equipment.

Mechanical and visual examination. The equipment shall be given a thorough mechanical and visual examination and test to determine that all materials, workmanship, and safety characteristics comply with the specified requirements.

Electrical circuit configuration. The equipment shall be examined or tested to confirm that the wiring is correct. Where applicable, the tests shall include the requirements specified in 1 and 2:

All intra-module wiring shall be tested to assure correctness.

The module grounding system shall be examined or tested to ensure proper separation of shield, signal, and framework grounds, and metal-to-metal contact for panels and components that serve as electromagnetic shields.

4.3.1.2 First article Level A performance tests. Level A testing shall be as specified in the government approved test procedure (see 4.4.4 Test plan below) and is intended to be a reduced amount of testing that is performed on each unit. Performance tests shall include testing of all performance capabilities as specified in 3.9 Performance requirements.

4.3.1.3 First Article Level B performance tests. One First Article unit that has satisfactorily passed the inspection and tests in accordance with 4.3.1 First Article inspection and tests, Group A shall be subjected to the Level B test specified in this CSS and the government approved test procedure. (see 4.4.4 Test plan below). Level B testing shall demonstrate the capability to meet the requirements specified in 3.9.3.4 Vibration sensor cables, connectors, adapters.

4.3.2 First article tests, Group C. First article units that have satisfactorily passed the inspection and tests in accordance with 4.3.1 First article inspection and tests, Group A shall be subjected to the Group C tests specified in MIL-PRF-28800F paragraph 4.5.5 for Class 3 equipment that are specified below and in the approved test procedure (see 4.4.4 Test plan below). The number of units tested shall be as specified below in a:

Altitude: Two units shall be tested in accordance with MIL-PRF-28800F paragraph 4.5.5.2.

Bench handling. Two units shall be tested in accordance with MIL-PRF-28800F paragraph 4.5.5.4.3.

4.3.3 First article tests, Group D. None.

4.3.4 First article tests, Group E. One unit that has satisfactorily passed the Group C tests in accordance with 4.3.2 First article tests, Group C shall be subjected to the Group E tests specified in MIL-PRF-28800F paragraph 4.5.7 for Class 3 equipment that are specified below and in the approved test procedure (see 4.4.4 Test plan below). The number of units tested shall be as specified below in a and b:

Acoustic noise. One unit shall be tested in accordance with MIL-PRF-28800F paragraph 4.5.7.2. Equipment that does not contain a motor (such as a fan or blower) or other audible noise source will not be tested.

Dimensions and weight. One unit shall be tested in accordance with MIL-PRF-28800F paragraph 4.5.7.3.

4.3.5 First article tests, Group F. The Group F tests shall be performed by evaluating the manufacturer’s data to establish that within 95% statistical certainty no equipment failures shall occur within at least 1500 hours of operation under normal conditions.

4.4 Examinations and test methods. The test methods, procedures, conditions, and failure criteria specified in 4.4.1 Failure criteria through 4.4.6.4 Post-test inspection shall be applied. Equipment operation shall be verified in accordance with a and b:

Satisfactory operation check. A satisfactory operation check employs a maximum number of active circuits of the equipment with a minimum requirement for external input or evaluation equipment to ensure that all functions of the equipment are operational. Wherever this CSS requires a satisfactory operation check to be performed, the parameters and the limits of acceptability shall be as specified in 3.9 Performance requirements above.

Satisfactory operation test. A satisfactory operation test employs the necessary external input and evaluation equipment to determine if the equipment conforms to the requirements of the CSS. Wherever this CSS requires a satisfactory operation test to be performed, the parameters shall be as specified in 3.9 Performance requirements above.

4.4.1 Failure criteria. For the purposes of this CSS, equipment failure is defined as any departure from the required performance or operation outside of the required accuracies (not correctable by normal use of the operating controls), or deviation from the criteria specified above in 3.9 Performance requirements after the test is initiated. The item shall have failed the test when any of the conditions specified in a through g occur:

Monitored functional parameters deviate beyond acceptable limits established below in 4.4.6.1 Pretest qualification Catastrophic or structural failure Mechanical binding or loose parts, including screws, clamps, bolts, and nuts, that results in component failure or a hazard to personnel safety Malfunction Degradation of performance beyond limits established in the purchase description Any additional deviations from acceptable criteria established before the test Deterioration, corrosion, or change in tolerance limits of any internal or external parts that could in any manner prevent the test item from conforming to operational service or maintenance requirements

4.4.2 Test sequence. The test sequence shall be as specified in the CSS. The test sequence shall proceed from Groups A and B to Groups C and D to Group E. The Group D testing, if required, may be performed concurrently with, or sequentially after, the Group C testing. Failure of any Group A through Group E test shall be counted as a major defect.

4.4.3 Test conditions. Unless otherwise specified in the approved test procedure (see 4.4.4 Test plan below), the inspections specified herein shall be performed under the conditions of a through e. Ambient conditions within the specified ranges need not be controlled. For equipment having a specified warm-up or stabilization period after turn-on, formal measurements and observations shall be made only after the specified time period as specified previously in 3.8.1 Warm-up.

Temperature: 25°± 10 °C Humidity: 20 to 70 percent RH Altitude: 0 to 4600 m Power: Nominal or alternate power source specified for the equipment Attitude: Normal operating position

4.4.3.1 Measurements of test conditions.