1 Purchase Description.pdf

23M-244A-OP

11 January 2023

Rev. 0

PURCHASE DESCRIPTION

FOR

Digital Theodolite

1. SCOPE:

The Digital Theodolite is used by the Air Force Precision Measurement Equipment Laboratories

(PMELs) as measurement standards for calibrating Infrared Target Simulator, HUD Fixtures, Bore sight Fixtures, Doppler, and Radar Antenna Adapter.

2. PERFORMANCE REQUIREMENTS:

2.1. Range:

2.1.1. Rotational Range: The Digital Theodolite shall have a continuous 360° range in both elevation and azimuth rotation and in both directions of rotation.

2.1.2. Telescope Focal Range: The Digital Theodolite Telescope minimal focal range shall be

24 inches or less and go out to infinity.

2.1.3. Telescope Magnification: The Digital Theodolite Telescope shall be at least 4X at minimum focal distance and increase to at least 32X at infinity.

2.2. Resolution: The Digital Theodolite shall have an elevation and azimuth angle resolution of 0.1 arc-seconds or better.

2.3. Measurement uncertainty: The Digital Theodolite shall have a measurement uncertainty determined in accordance with ISO 17123-3 to be 1.0 arc-seconds or better (1 sigma).

2.4. Units: The Digital Theodolite shall have units in Sexagesimal Degrees (Degree-Minutes-

Seconds), Decimal Degrees, Gons (400 gons/circle), and mils (6400 mils/circle).

2.5. Accuracy:

2.5.1. Plate Level: The Digital Theodolite Bubble Plate Level shall have an accuracy 20” per

2mm division or better.

2.5.2. Optical/Laser Plummet: The Digital Theodolite shall include an adjustable plummet for centering the instrument over a benchmark to an uncertainty of 0.5 mm or less.

2.5.3. Telescope Line-of-Sight: The Digital Theodolite Telescope Line-of-Sight shall have an accuracy of 2 arc-seconds or 0.002 inches whichever is greater.

2.6. Warm up Time: The Digital Theodolite shall meet all specifications contained in this purchase description after a warm-up time not to exceed 30 minutes.

2.7. Continuous Operation: After the required warm-up period, the Digital Theodolite shall meet the specifications of this purchase description and shall not display any intermittent characteristics of overheating for an extended period of not less than 24 hours of continuous operation.

3. FUNCTIONAL REQUIREMENTS:

3.1. Plunge and Reverse: The Digital Theodolite shall be able to perform plunge and reverse readings at any location.

3.2. Objective Aperture: The Digital Theodolite Objective Aperture shall be erect.

3.3. Reticle Target:

3.3.1. The Digital Theodolite shall have fine reticle crosshairs.

3.3.2. The Digital Theodolite shall include an illuminated reticule for autocollimation readings on target mirrors. The form of the target shall be a bright cross centered on a dark background.

The target shall be illuminated using a green or yellow-green led light source. The width of the cross arms shall be such that the eyepiece reticule can be centered on it repeatedly to less than 0.5 arc-seconds by an experienced user. (One sigma of ten settings on stationary mirror.)

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3.4. Leveling Feet: The Digital Theodolite Base shall have three leveling feet with fine thread screw adjusters.

3.5. Base:

3.5.1. The Digital Theodolite Base shall have a standard 5/8-11 threaded hole for mounting to instrument stands.

3.5.2. The Digital Theodolite Base shall have a coarse level (bubble level) with sufficient resolution to bring the instrument in range of the fine leveling indicator.

3.5.3. The Digital Theodolite Base shall have a fine level (damped electronic sensor) that is capable of aligning the axis of rotation of the alidade to the local gravity vector to within 1 arc-second or better.

3.6. Ancillary Equipment: The Digital Theodolite shall include mount, Cables, Connectors, and any other necessary equipment to perform measurements and meet the requirements of this

Purchase Description.

3.7. Digital Display:

3.7.1. The Digital Theodolite digital display shall show both the azimuth and elevation angle simultaneously.

3.7.2. The Digital Theodolite shall have dual displays (one on each side of the instrument), to facilitate reading the theodolite in both direct and reverse positions

3.8. Error Correction: After setting up the instrument for plate level, taking two face settings on a target near the horizon, and two face settings on an elevated target, the Digital Theodolite shall detect and correct for its own alignment errors. These shall include as a minimum horizontal and vertical collimation error, and trunnion axis error (tilting axis misalignment).

3.9. Level Compensation: The Digital Theodolite shall use the electronic level to compensate readings based on the actual tilt of the instrument’s standing axis. The compensator’s range shall be at least 3 arc-minutes.

3.10. Diagnostics: The Digital Theodolite shall have internal functional self-tests. These self-tests shall, whenever possible, provide an internal verification of the equipment’s modes of operation. These self-tests shall indicate on the display the results of each self-test. Self-tests shall require no external standards of devices.

3.11. Network: The Digital Theodolite shall be an isolated system (NO Internet Access).

4. MECHANICAL & PHYSICAL REQUIREMENTS:

4.1. Cables: The Digital Theodolite Cables shall be at least 5 meters in length.

4.2. Power: The Digital Theodolite shall use an external power supply ranging from 90V AC to

240V AC.

4.2.1. Operational Power: The Digital Theodolite shall meet all paragraph 2 requirements while operating on standard ~110 V AC 60 Hz electrical power outlet.

4.3. Dimension: The Digital Theodolite shall not exceed 12 x 12 x 18 inches (width x length x height).

4.4. Computer Interface: The Digital Theodolite shall provide a means of outputting the measurements to a computer by means of a USB interface

4.5. Carrying/Shipping Case:

4.5.1. A reusable Storage and Transportation Case(s) shall be rugged, waterproof, with at least two handles and fit the Digital Theodolite, Ancillary Equipment and user’s manual.

4.5.2. Storage case shall be capable of repeated opening and closing without degradation of the reusability of the case.

4.5.3. Storage Case shall have a label that identifies noun, model or part number, manufacturer, and serial number. Unique item identification shall follow the Item Identification and

Valuation clause as stated in the contract.

4.5.4. Storage Case shall be secured using latches or locks, and capable to support the weight of the Digital Theodolite, Ancillary Equipment and user’s manual.

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4.5.5. Storage Case shall be capable of fitting through a 6’x3’ Doorway without being rotated on its side or top.

4.5.6. Storage case will be inspected by the Air Force and shall be free from any defects (i.e. poor molding fabrication, loose materials, damaged or improperly assembled cases, peeling, or chipping of plating or finish, nicks or burrs of metal parts, and post molding warping) which affect the durability, strength, safety, or serviceability. The finish of exposed edges/surfaces shall be smooth and free of sharp or jagged edges.

4.5.7. Storage case shall have cushioning and mounting provisions inside the case that provides protection to prevent damage from normal handling during transportation.

4.5.8. Storage case interior material shall be manufactured from a material that will not corrode any part of the Digital Theodolite, Ancillary Equipment and user’s manual; the material shall be oil resistant and not deteriorate.

4.6. Model and Serial Number Identification: The Digital Theodolite shall be identifiable by manufacturer, model or part number, and serial number for identification. Unique item identification shall follow the Item Identification and Valuation clause as stated in the contract.

4.7. Operating Environment/Storage: The Digital Theodolite shall be capable of operating to the specifications listed above in paragraph 2 in temperatures of 67° F to 79° F with a Relative

Humidity (RH) of 20% to 50%. The Digital Theodolite shall be capable of being stored in an environment of 0° F to 130° F with a Relative Humidity (RH) less than 95%.

4.8. Workmanship: The workmanship shall be first class, of neat general appearance in compliance with standard commercial practices. The standards of workmanship shall be such that the system complies with the requirements set forth in this purchase description.

5. 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.

6. OPERATOR’S MANUAL: The Digital Theodolite shall come with a Commercial Off the Shelf

(COTS) operator’s manual describing features and functions, assembly and start up, detailed operation, instructions and troubleshooting, adjustments, technical data, maintenance and care, and warranty.

7. TESTING: This item will be inspected and accepted at destination as stated in the contract. The item will be checked with test equipment with parameters equal to or better than those required to ensure that specified performance parameters are met. Test equipment used shall have first echelon certification directly traceable to the National Institute of Standards Technology (NIST) or other

AFMETCAL-approved equivalent international laboratory. Tests will be performed to ensure that the item meets the requirements of this purchase description. Such testing at destination does not relieve the contractor of performing all inspections and quality checks at the point of manufacture as necessary to assure performance as specified herein. Acceptance Testing will be performed at the Air

Force Primary Standards Laboratory (AFPSL).

Attachment:

Data Requirements

Attachment to

Purchase Description

Digital Theodolite

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).

FAILURE SUMMARY AND ANALYSIS REPORT: A complete Failure Summary and Analysis Report shall be provided once at the end of every Fiscal Year (once/if warranty repairs begin). The reports shall comply with Data Item Description (DID) DI-SESS-81495B and the Contract Data Requirements List (DD Form

1423).