1- PD_Rev3_22M-590A-PR_Hydraulic Pressure Standard 16Feb22.pdf

22M-590A-PR

February 16, 2022

Rev 3

PURCHASE DESCRIPTION

FOR

Hydraulic Calibration System

1.0 SCOPE: For this Purchase Description (PD), the Hydraulic Gauge Calibrator will be referred to as

HGC. The HGC will replace two Hydraulic Gauge Calibrators, P/N: E-DWT-10000-AF and P/N:

HGC-30000-AF. Both of these standards were manufactured by DH Instruments Inc. Both of these standards are aging, the HGC-30000-AF is no longer supported by the manufacturer. This replacement will convert two standards into one standard for all PMELs. This will increase supportability for hydraulic pressures across the Air Force. The HGC shall calibrate hydraulic pressure TMDE (pressure gauges, transducers, etc.) up to 30000 PSIG.

2.0 PERFORMANCE REQUIREMENTS:

2.1 Operations: The HGC shall be portable which allows it to be moved efficiently from on-site to off-site location.

2.1.1 HGC shall not require an external air supply

2.1.2 HGC shall operate with hydraulic fluid

2.1.2.1 Hydraulic fluid provided with unit shall be Sebacate

2.1.3 HGC shall be a transducer based digital readout.

2.2 Range: The HGC shall be capable of generating and measuring at least the following pressure range:

2.2.1 0-30000 PSIG

2.3 Pressure Uncertainty: The HGC shall have an uncertainty of at least the following:

2.3.1 ± 0.025% FS of each range listed below:

2.3.1.1 0-1000PSIG, 0-2000PSIG, 0-4000PSIG, 0-6000PSIG, 0-10000PSIG,

0-18000PSIG, and 0-30000PSIG

2.3.2 Uncertainty shall include, but not limited to the combined effects of pressure, hysteresis, repeatability, linearity, and temperature compensation.

2.3.3 The HGC shall be capable of maintaining its uncertainty for a minimum of 12 months.

2.4 Resolution: The HGC shall be able to display a resolution of one-tenth the uncertainty for each engineering unit, user adjustable.

2.5 Environmental Requirements: The HGC shall be able to operate or be stored in the following environmental conditions:

2.5.1 Operating Temperature: 64 to 82°F

2.5.2 Storage Temperature: 32 to 122 °F

2.5.3 Operating Humidity: 0 to 70% RH

2.5.4 Storage Humidity: 0 to 90% RH

2.6 Warm-Up Time: The HGC shall require a warm-up time of not greater than 1 hour.

3.0 FUNCTIONAL REQUIREMENTS:

3.1 Display: The HGC shall have an alphanumeric display. It shall be an illuminated vacuum fluorescent, LED, LCD, or plasma display. All information required by the user to operate all modes and functions shall be accessible through the front panel interface.

3.1.1 Industrial Environment: Display and front panel controls shall be oil resistant and designed to function in an industrial environment.

3.1.2 Front Panel Controls: All modes and functions of the equipment shall be operable using front panel controls. The locations and labeling of indicators, controls, and switches shall provide for maximum clarity and easily-understood operation without reference to tables, charts, or diagrams. If the controls are in a menu format, the menu structure shall be efficient with related controls grouped together. If a menu format is not used, each main parameter shall have its own selection key and the control buttons shall be logically organized on the front panel.

3.1.3 Units: The HGC shall have, at a minimum, the following units of pressure:

3.1.3.1 PSI, kPa, MPa, Bar, and at least one user defined unit.

3.1.4 Head Correction: The HGC shall allow the user to enter a head correction through the front panel by entering the difference in height between the Device

Under Test (DUT) and the HGC.

3.1.4.1 The HGC shall automatically correct for this difference in height to determine the pressure at the DUT reference level up to a maximum of 3 feet.

3.1.4.2 The HGC shall indicate whether or not a head correction is being applied.

3.1.4.3 For DUTs that are lower than the reference level the correction entered will be a negative number.

3.1.4.4 For DUTs that are higher than the reference level, the correction entered will be a positive number.

3.1.5 Stability Limit: The HGC shall have a user adjustable stability limit.

3.1.5.1 Stability Indication: Once the set stability limit has been achieved, a visual indication is given on the HGC.

3.1.5.2 Stability Specification: The HGC shall become stable to within 0.01%

Rdg/sec. at maximum pressure in five minutes or less. This is based as a closed system (No DUT is attached) and starts when the pressure set-point has been achieved.

3.1.6 Hydraulic Fluid: The HGC shall be able to utilize, at a minimum two different testing mediums.

3.1.7 Gravity: The HGC shall allow the User to enter their local gravity if necessary to achieve the required uncertainty in paragraph 2.3.

3.1.8 Operator Calibration: The HGC shall have a Calibration Mode able to verify that the pressure indications are within the required tolerance when compared to a higher-level standard. The higher-level standard shall provide the pressure generation and control. The Calibration Mode shall display pass/fail conditions and allow for adjustment of transducer coefficients when required.

3.1.8.1 Calibration Mode: The Calibration Mode may be a vendor supplied PC based software.

3.1.8.2 Calibration Coefficients: The operator calibration shall utilize a maximum of a second order polynomial fit.

3.2 Zero Correction: If an external standard is required for zero correction, the HGC shall not require this zero correction more often than once every 30 days to maintain the system uncertainty.

3.3 Reference Level: The HGC reference level shall be clearly identified on the unit.

3.4 Measurement System: The HGC shall not consist of more than four (4) transducers.

3.4.1 Automatic Transducer Selection: The HGC shall automatically select the appropriate transducer depending on the range of the device under test if all transducer are encased.

3.4.2 Manual Transducer Selection: The HGC shall have the ability for the User to manually select and use a specific transducer.

3.4.3 Transducer Indication: The HGC shall clearly indicate which transducer is being used.

3.5 Pressure Control: The HGC control system shall be a manual control system. There shall be a manual coarse and fine adjustment.

3.5.1 Coarse Adjustment: Coarse adjustment is for setting of a rough pressure.

3.5.2 Fine Adjustment: Fine adjustment is for setting of the final pressure. The resolution of this adjustment shall allow for a setting of pressure within 50% of the system uncertainty for each range listed in 2.3.1.

3.6 Overpressure Protection:

3.6.1 The HGC shall have at a minimum an audible alarm that will sound when the system reaches approximately 105% of the active transducer’s full scale range.

3.7 Internal Reservoir:

3.7.1 Hydraulic fluid shall be contained within the HGC using a reservoir.

3.7.2 The HGC shall have a reservoir volume capable of holding at least 300cc hydraulic fluid.

3.7.3 The HGC shall use a priming pump with the reservoir.

3.8 Stylus: If a touchscreen display is provided with the HGC, a stylus shall be provided with the unit.

3.8.1 The Stylus shall be mounted to the HGC as to not interfere with the operation of the standard.

3.8.2 The Stylus shall be designed to allow easy operation of the touchscreen.

4.0 MECHANICAL & PHYSICAL REQUIREMENTS:

4.1 Size and Weight: The HGC and all accessories shall be portable.

4.1.1 The HGC shall not weight more than 50lbs.

4.1.2 The HGC shall not be longer 24 inches on any side.

4.2 Shipping/Carrying Case: Reusable case shall be provided with the HGC. The case shall be rugged, rigid, waterproof, and capable of withstanding shock and vibration from day-to-day shipping.

4.2.1 Case: Storage Case shall be secured using latches, and have carrying handles capable to support the weight of all components. Storage case shall have cushioning and mounting provisions inside the case that provides protection to prevent damage from normal handling during transportation. Storage case interior material shall be manufactured from a material that will not corrode any part of the components; the material shall be oil resistant and not deteriorate.

4.2.2 Portable: The storage case shall have retractable handles for transportation.

4.3 Pressure Connections: The HGC shall be equipped with standard high pressure hydraulic connections to a test port to allow connection of a test instrument or a calibration standard.

4.4 Construction: The HGC shall be designed and constructed of materials that meet the requirements of this specification and in accordance with the best commercial practices for industry approved equipment. It shall be the contractor’s responsibility to assure the government that such design objectives as reliability, accuracy of operation, maintainability and ease of operation have been given due consideration in the manufacture of this equipment. All parts such as shafts, bearings, regulators, switches, controls, connectors, etc., shall have proper clearance and adjustments. They shall work together so that the equipment shall supply the rated requirements without unnecessary strains, vibrations, and overheating.

They shall be able to withstand the conditions met in shipping, storage, installation, and services. All materials and parts of this equipment shall be capable of withstanding environmental testing requirements of this specification.

4.5 AC Power Rating: The power required to operate the HGC shall be ~120 VAC at 50/60 Hz or battery powered. The HGC shall not draw more than 15 Amps.

4.5.1 The HGC shall not use more than one (1) outlet.

4.5.2 Detachable power cord shall be provided.

4.5.3 The HGC shall be able to be operated on battery power

4.5.3.1 If the battery is rechargeable, a charger source shall be provided.

4.6 Individual Unique Identifier Designation: The HGC shall be clearly labeled with a model number, serial number, and manufacturer’s name. Unique item identification labeling shall follow Item Identification and Valuation requirements as stated in the contract. The HGC shall be clearly labeled with an expiration date of the Warranty Agreement.

4.7 Electrical Protection: If the HGC operates on AC line power, it shall have a fuse or circuit breaker to protect it in the event of excessive current. The AC line power fuses shall be user serviceable without removing any covers /panels or voiding a manufacturer’s service warranty.

5.0 FIRMWARE/SOFTWARE:

5.1 Software/Firmware Identification: Software/firmware version shall automatically display upon startup. All software/firmware used in conjunction with instrument shall be identified by Name, Version, and Date; which is to be displayed upon startup or located in an “About” menu in the software/firmware.

5.2 Software/Firmware Warranty:

5.2.1 The contractor shall warrant that the software/firmware product meets this purchase description and is free from defects in design and operation and will perform to stated specifications within this purchase description.

5.2.2 The contractor shall (at no additional cost) update, or replace the software/firmware product as necessary to correct any deficiencies identified in the software/firmware. Replacement software/firmware shall meet or exceed the requirements in this purchase description. This condition applies to all units purchased under this contract.

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

6.0 OPERATOR’S MANUAL: As stated in the data attachment, DD1423, and DiDs manuals shall include the following:

6.1 Individual Component Listings: The manual shall list the field replaceable components, which includes OEM manufacturer’s name, and OEM part number. If applicable, include component range and uncertainty.

6.2 Calibration and Alignment Procedures: The manual shall have calibration (verification) and alignment procedures for calibrating and aligning the pressure transducers, temperature sensors, and any other component that requires periodic calibration.

6.3 Remote Command Listings: The manual shall list the input/output parameters, command strings and other pertinent data required to accomplish remote operation of the HGC.

6.4 Maintenance: The manual shall include preventative maintenance inspection procedures and intervals required for proper operation of the unit.

6.5 Block diagrams of the following systems in the HGC:

6.5.1 Fluid

6.5.2 Mechanical

7.0 Environment, Safety, and Operational Health: A combination of the system manual, other documentation, and/or the system itself shall identify potential environment, safety and operational health hazards and how they are mitigated when the design itself cannot mitigate them. This will be accomplished through stating the hazard and accompanying mitigation through the use of safety devices, use of warnings, or use of special operational procedures to counter such hazards.

8.0 TESTING: The HGC 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 sources where required. Test will be performed to assure the HGC 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.

Attachment:

Data Requirements

Attachment to

Purchase Description

Hydraulic Calibration System

DATA REQUIREMENTS

MANUALS: A complete user and service manual and calibration procedure shall be provided with each unit in contractor format. Manuals shall be on CD/DVD-ROM in Indexed Portable Document Format

(iPDF). The manuals shall comply with Data Item Description (DID) DI-TMSS-80527C and the Contract

Data Requirements List (DD Form 1423).

CALIBRATION CERTIFICATE: A calibration certificate, traceable to the National Institute of Standards and Technology (NIST) or other national metrology institutes (NMIs) shall be provided with each instrument. This calibration certificate must comply with Data Item Description (DID) DI-QCIC-80798C and the Contract Data Requirements List (DD Form 1423).