Purchase_Description Universal Force Calibratior FY 2020.pdf

PURCHASE DESCRIPTION

Force Calibration System

1. SCOPE

This Purchase Description is for a metrology grade automatic vertical force calibration load frame system with the capability of producing 60,000 lbf in tension and compression. The system will be used for the secondary calibration of Army transfer load cells and dynamometers . The system shall be commercial off the shelf (COTS) .The system shall operate in both automatic and manual mode. The system shall include a load cell indicator for the standard load cell. The system shall maintain compatibility with and incorporate the use of equipment already in the Army inventory, including: HBM MGC+ (see 3.7) as the device under test (DUT) indicator, Tovey Engineering CS Model load cells (see 3.6) as the reference load cells, and an Army HP laptop controller operating on Army Gold Master Windows 7 32-bit operating system (see 5.2). Proposals shall demonstrate or indicate that the contractor's proposed equipment meets or exceeds each of the requirements listed in this specification.

2. PERFORMANCE REQUIREMENTS

2.1 Standard Deviation: The calculated standard deviation of a calibration shall not exceed 0.0125% of Full Scale using techniques in ASTM E74 (section 7 and section 8.4).

Testing: Standard deviation of the system will be tested by comparing two Tovey Engineering CS Model load cells of equal range (2K, 10K, 25K, and 60K lbs) on the system. The standard cell to be used will be calibrated by the Army using a primary dead weight force machine. The standard cell achieves an approximate standard deviation of 0.005% Full Scale. The standard cell will be connected to the contractor-supplied indicator unit (see 3.8). The DUT cell will be connected to an Army HBM MGC+ indicator unit, with an accuracy of 0.0025% Full Scale. The standard deviation will be calculated from a thirty point calibration. Three runs will be made from 10% full-scale to 100% full-scale, with the cell rotated 120 degrees between each run.

Ten points will be taken on each run, spaced at 10% full-scale intervals

2.2 Range: Load Frame shall be capable of applying force from 200 to 60,000 lbf over a continuous range in both compression and tension.

2.3 Warm-Up Time: System shall be operational within an initial warm-up time of no more than 1 hour, not including time acclimating to ambient conditions.

2.4 Noise Exposure Level: System shall operate at noise no greater than 85 dBA.

2 .5 Manual mode stability shall be 0.0002mV/V or better.

2.6 System shall produce a stable reading within 30 seconds in automatic mode.

3. FUNCTIONAL REQUIREMENTS

3.1 System shall perform calibration in tension and compression without reconfiguration of load cells.

3.2 System shall be capable of operation in both manual and automatic control through the entire range.

3.3 System shall have remote interfaces through USB, RS-232C, and/or IEEE 488.2, and contractor shall provide programming command set for each item of the system.

3.4 System shall be capable of running a fully automated test sequence, which includes the following:

3.4.1 Fully exercise both the standard and DUT.

3.4.2 Perform minimum of a 30 selectable point calibration over the continuous range from10% to100% of the standard load cell range, only requiring user interface to rotate the load cell.

3.4.3 Automated system shall calculate polynomial calibration equation with both force and mV/V as the independent variable.

3.5 System shall incorporate the Tovey Engineering Calibration (CS Model) Load Cells (CS10-2K-

B200, CS10-10K-B200, CS20-25K-B200, and CS20-60K-B200) as the standard load cells, which are already in the Army Inventory. Army load cells do not have the same thread sizes as the standard CS model. Thread sizes can be provided on request.

3.6 System shall incorporate the HBM Model MGC+ (ML38 module using S40-US Army version firmware) for the DUT indicator, which is already in the Army Inventory and is provided with Army transfer DUT load cells.

3.7 Contractor shall provide an indicator to be used in reading the standard load cell during the calibration. Indicator shall be capable of re-calibration with the standard load cells (see 3.6) by the US Army TMDE Primary Standards laboratory following ASTM E74 procedures. User manual, cabling (to include indicator to load cell and indicator to computer interface), and automation command set for the indicator shall be provided (see 3.3).

3.7.1 Accuracy: 0.003% FS ± digital count

3.7.2 Calibration Method: mV/V

3.7.3 Power Requirement: 115 VAC 60Hz Standard U.S. electrical power.

3.7.4 Excitation: 5V or 10V

3.7.5 Range: ± 4.5 mV/V

3.7.6 Current Drive: 180 mA at 5 VDC or 10 VDC

3.8 System shall provide capabilities to re-program calibration coefficients on the HBM Model

MGC+ (ML38 module using S40-US Army version firmware) with the DUT load cells.

3.9 System shall include all necessary adapters for the following test connections:

3.9.1 Reference Load Cells: Army reference load cell models: (see 3.6)

3.9.2 DUT Load Cells:

Tovey load cell models: CS10-2K-B200, CS10-10K-B200, and CS20-25K-B200.

Dynamometer models: The system will require shackles/clevises for the Dillon 50K dynamometer model 30784-0033, ED-2000 (50K) .

3.10 System shall include adapters that enable precise rotation of the DUT from its original starting position, to 120, and then to 240 degrees with respect to the standard.

4. MECHANICAL & PHYSICAL REQUIREMENTS

4.1 Total height of system shall not exceed 120 inches when fully extended .

4.2 Maximum working area height shall be large enough to incorporate all configurations of standard load cells and DUT load cells or standard load cells and DUT dynamometers with shackles (see 3.6 and 3.10).

4.3 Maximum weight of system shall not exceed 2000 lbs.

4.4 System shall include load cell cables, of at least 10ft in length, to connect indicators to load cells.

The Army's standard load cell used for both standard and DUT, is a calibration grade load cell with a cable connector MS3112El0-6P with the following pinout:

A is +Exc D is -Exc E is Remote sense -Exc F is Remote sense +Exc B is +Signal C is -Signal

4.5 System shall have sufficient leveling capabilities.

4.6 All item Part Numbers/Model Numbers, Manufacturer and Serial Number shall be identified clearly on each item in a location visible to the operator.

4.7 System shall operate on a standard 60Hz U.S. electrical power.

4.8 System shall operate in ambient conditions of 20±2◦ C without loss of performance.

4.9 System shall operate in ambient conditions of 20 to 75% Relative Humidity without loss of performance.

5. CONTROLLER REQUIREMENTS

5.1 System shall be provided with installation program and installation instructions for any software required to operate the system and shall meet all requirements of the specification .

5.2 System software shall operate on Army HP ProBook 650 G1 Notebook controller, running with

Army Gold Master 10.0.2 Windows 7 Enterprise SP1 32-bit operating system. Laptop hardware specification will be available on request.

5.3 System software shall provide capabilities to re-program calibration coefficients on the

Precision Measurement Amplifier HBM Model MGC+/ML38 module, using S40-US Army version firmware, with the DUT load cells.

6. MANUAL

6.1 System shall include manuals with the following information:

6.1.1 Setup and installation instructions for the system and software.

6.1.2 Operational instructions for the system to perform the calibration and testing of all l oad cells and dynamometers listed in 3.10, complete with drawings and diagrams as necessary.

6.1.3 Complete list of accessory equipment required to complete a test sequence.

6.1.4 Complete peripheral automation command set (see 3.3).

6.1.5 Maintenance and troubleshooting procedures.

6.1.6 Complete parts breakdown of the system with manufacturer and part number.

6.2 For parts routinely ordered for maintenance or repair, a data sheet consisting of picture/drawing, dimensions, weight, and cost shall be provided.

7. INSTALLATION AND TRAINING

7.1 A system shall be delivered to each of the following destinations by contractor.

Directorate, USATA Region Europe ROB Einsiedlerhof, Gate 8 Weilerbacher Strasse 611 Rheinland-Pfalz 67661 Kaiserslautern

U.S. Army TMDE Activity - Region Pacific

ATTN: ACL CHIEF

AMAM-TMD-PK, UNIT #15376, Bldg. S-684 Camp Carroll, Waegwan, Korea, ZIP: 39887

COM: 82-54-363-5348, DSN: 315-763-5348

7.2 Contractor shall perform complete installation of system on each site.

7.3 Contractor shall provide all hydraulic fluid needed for initial installation and training.

7.4 Contractor shall provide a minimum of 2 day on-site training after installation.

8. ACCEPTANCE

8.1 System will be inspected and accepted at the destination of delivery and training. After it has been fully installed, the system shall meet all requirements in this document.

9. WARRANTY

9.1 The system shall include a standard, commercial 3-year warranty.