SCAT4174-NRL-PD-20181001.pdf

1 October 2018

NRL 5524

PURCHASE DESCRIPTION

Dew Point Hygrometer

SCAT 4174

Solicitation Number: SPRMM1-18-R-HB28

Amendment

1.0 GENERAL This document identifies the requirements for a portable dew point hygrometer, capable of measuring dew/frost point (in °F and °C) and pressure (in psig) of compressed air and gas for the purpose of preventative maintenance of Navy prime systems. Measurement performance requirements are detailed in the following paragraphs.

2.0 CLASSIFICATION The equipment shall meet the requirements of MIL-PRF-28800F class 2 for

Navy shipboard, submarine and shore applications with the exceptions listed in this document.

Class 2 equipment is designed for rugged operational environments where the environmental conditions are routinely encountered in an unprotected, uncontrolled climate.

3.0 OPERATIONAL REQUIREMENTS The equipment shall meet the minimum stated ranges and accuracies specified in this section and may exceed them. All references to dew point shall be inferred to mean frost point below 32°F (0°C). The equipment shall indicate frost point below 32°F (0°C).

3.1 Dew Point

3.1.1 Calibrated range: -85°F to +50°F (-65°C to +10°C)

3.1.2 Accuracy: ±3.6°F (±2°C)

3.1.3 Display type: Digital

3.1.4 Display resolution: User configurable to 0.1°

3.1.5 Units: °F and °C

3.2 Pressure

3.2.1 Range: 0 to 5,000 psig

3.2.2 Accuracy:

3.2.2.1 0 to 999 psi: ±5 psig

3.2.2.2 1,000 to 5,000 psig: ±0.5% of full scale (±25 psig)

3.2.3 Display type: Digital

3.2.4 Display resolution: 1

3.2.5 Units of measurement: psig

3.3 Response Time

3.3.1 As a complete system (to include the unit, hose, and any adapters or fittings), the equipment shall meet the following (ambient defined as +70°F (+21°C) (±5°F/2.8°C), 40% RH (±20%)).

3.3.1.1 Dry out time: After exposure to ambient air for 5 minutes, when connected to a sample gas source of 120 psig or less with a dew point of -94°F (-70°C) or less, equipment shall read a dew point of less than -85°F (-65°C) in ≤ 16 hours, flowing at a rate of no more than 2.5 SCFH.

3.3.1.2 Low pressure: After exposure to ambient air for 5 minutes, when connected to a sample gas source of 120 psig or less, with a stable dew point of -40°F (-40°C) (±5°F/2.8°C), equipment shall provide a stable reading in ≤60 minutes, with “stable” being defined as no more than 0.72°F (0.40°C) variance between any two consecutive 5-minute readings across a 15-minute period.

3.3.1.3 High Pressure: After exposure to ambient air for 5 minutes, when connected to a sample gas source of greater than 3000 psig with a dew point of less than +6°F (-14.4°C), equipment shall read a dew point of less than +6°F (-14.4°C) in ≤60 minutes using a flow rate of no more than

10 SCFH.

3.4 Filter Requirement: An in-line filter for protection of the sensor element shall be included with the equipment. The filter shall be a ≤50 micron sinter mesh and located between the equipment test air intake and the sensor. The filter shall be configured to be removed and cleaned or replaced by the end-user.

3.5 Reactive Agent Susceptibility: The equipment shall be comprised such that all components that are wetted by test gases shall not be adversely impacted by the presence of ammonia compounds, routinely found in breathing air on board submarines, for at least the duration of one full calibration interval.

3.6 Test Air Flow Control:

3.6.1 Flow Metering: If not integrated into its design, the equipment shall be provided with metering valves which can be directly attached to the equipment’s input and output ports, enabling control over test air flow into and out of the equipment. The valves shall be rated to the full sample pressure, predominantly constructed from stainless steel, and have a flow coefficient factor of .010 (Hoke Model 1335XXX or equivalent).

3.6.2 Flow: The unit shall incorporate a flow meter on the output (after the output valve) rated from 2-

20 SCFH.

3.7 Welding: Any piping, tubing or structural welds shall be in accordance with NAVSEA Technical

Publication S9074-AR-GIB-010-278.

3.8 Measurement Status Display:

3.8.1 If the equipment incorporates a measurement status indication (not required), it shall only provide a status indicating a measurement is not possible (example: “warming up”, “dry-out in progress”, etc.) and shall not indicate to the user that the measurement is completed, stable, or calibrated (example: “Measurement OK”). This is intended to require the user to only use Navy specified stability criterion for measurements.

4.0 GENERAL REQUIREMENTS

4.1 Environment

4.1.1 Operating Temperature: +14°F to +122°F (-10°C to +50°C), battery charge mode +32°F to

+122°F (0°C to +50°C)

4.1.2 Non-operating Temperature: -4°F to +140°F (-20°C to +60°C).

4.2 Power Source/Consumption: The equipment shall be operable under both AC and DC power sources.

4.2.1 DC power: The equipment shall be operable using internal DC battery source. Batteries must conform to the restrictions detailed in this document.

4.2.1.1 Battery life: The battery’s minimum operating time shall be at least 8 hours following a maximum recharge time of 8 hours. A charger that accepts 110/220 + 10% Volt at 50/60 Hz single phase shall be provided for each unit.

4.2.1.2 Indicator: An indication of current battery capacity shall be incorporated into the display.

4.2.2 AC power: without removing the battery, the equipment shall operate on 120V, 60Hz line/shore power, and will include the necessary cord(s) and adapter(s) to accomplish this.

4.3 Stowage/Configuration Requirements:

4.3.1 Transit case: A hard shell, waterproof case that meets the requirements of MIL-PRF-28800F shall be provided that can hold the equipment, all accessories, and the operator’s manual.

Transit case handle requirements of MIL-PRF-28800F shall be waived.

4.3.2 Weight: The complete system (equipment, all accessories, and operator’s manual inside the transit case) shall not exceed 11 kilograms (24.25 pounds).

4.3.3 Dimensions: The complete system (equipment, all accessories, and operator’s manual inside the transit case) shall not exceed 18.2” X 13.9” X 6.7”.

4.3.4 Enclosure: The equipment enclosure shall conform to the requirements of MIL-PRF- 28800F with the exception of the electrical power connection location requirement of 3.6.4.8 which is waived. A configuration that has a separate indicating device and sampling system is acceptable.

4.3.4.1 For an equipment configuration consisting of a separate indicating device and sampling assembly:

4.3.4.1.1 A single multi-conductor cable shall be used between the two.

4.3.4.1.2 No tubing shall be used of less than 1/4 inch outside diameter.

4.3.5 Handles: Equipment that is configured as one unit in a single enclosure shall incorporate a carrying handle. Equipment configured as a separate indicating device and sampling system shall incorporate a carrying handle on the indicating device only.

4.3.6 Function Labelling:

4.3.6.1 Each control valve and connection port shall have a nameplate to indicate its function.

4.3.6.2 There shall be user visible recommendation of the proper flowmeter orientation for use and a maximum allowed flow rate warning.

4.3.7 User Guides:

4.3.7.1 Quick-start Guide: Basic instructions for a new user to perform measurements shall be attached to the equipment, such as a printed instruction plate on the equipment enclosure, or a laminated card that can be attached to the equipment with a tether.

4.4 Accessories:

4.4.1 Hose: The equipment will be provided with one armored sampling hose assembly capable of withstanding all operating pressures, of no less than six feet in length. One end will be terminated in a connector designed to mate with the test air intake port of the instrument, and the other end will be terminated with a 37° flared connector designed for use with the adapters specified in section 4.4.2. The hose shall incorporate with tethered end caps at each end and shall be labeled with its maximum pressure rating.

4.4.2 Adapters: Shall be used to accomplish mating to high and low-pressure fittings in lieu of multiple sampling hose assemblies and shall include the following: 37° flared with 9/16” union nut, 9/16” union nut to ¼” NPT.

4.5 Materials/Equipment Limitations and/or Restrictions:

4.5.1 Battery Restrictions Exceptions: Per Naval Ordnance Safety and Security Activity (NOSSA), the use of Lithium primary (non-rechargeable) coin cell batteries meeting the following criteria is authorized for Naval personnel and on Naval activities, surface ships, submarines, and aircraft:

a. Unmodified, commercial-off-the-shelf (COTS) item;

b. Used in single-cell configuration;

c. Maximum nominal output of 3 Volts;

d. Maximum rated capacity of 1 Amp-hour (Ah).

4.5.2 Exception: Per Naval Ordnance Safety and Security Activity (NOSSA), the use of lithium ion rechargeable (secondary) batteries meeting the following criteria is authorized for Naval personnel and on Naval activities, surface ships, submarines, and aircraft:

a. Unmodified, COTS battery;

b. Underwriter’s Laboratories (UL) listed (certified);

c. Used in the device as recommended by the manufacturer;

d. Recharged only by expressly designed for recharge of the specific battery in use;

e. No more than four cells in series (less than or equal to 18-Volt output;

f. Rated for no more than 100 Watt-hours, as listed in the manufacturer’s specification or calculated by multiplying the capacity in Ah by the maximum working (nominal performance) voltage.

4.6 Interface Requirements:

4.6.1 Wireless: All wireless technology interfaces shall be disabled.

4.7 Maintenance and Technical Documentation:

4.7.1 The equipment shall be categorized as repairable to level 2 (to the module level). The technical manual shall provide necessary guidance to perform level 2 maintenance. A use and installation manual (operator’s manual, level 1) shall be provided separately.

Maintenance information shall include:

• Parts lists to the component level

• Schematics and component layout drawings

• Block and schematic diagrams

• List of required test equipment and connection diagrams, and sequential instructions for disassembly, repair, replacement, and reassembly

• Board-level maintenance and troubleshooting information

• Step-by-step instructions for troubleshooting and fault isolation

• Expected signal levels

• Test data sheets will be included, and as required

• The instructions will define localizing a defective circuit card

Parts list(s) shall include:

• Parts list(s) shall be shown on illustrations or a separate listing that includes an index or reference to other illustrations

• Part number, CAGE code, and generic description

The technical manual shall be provided in both printed and electronic formats. The printed format shall be otherwise normally provided. The electronic format shall be in Portable Document Format (PDF) - ISO 32000-1:2008. Two separate CD/DVDs are required, one shall contain the Use and Installation manual and one shall contain the Maintenance and Service manual. Individual file size may not exceed 5 MB. It is permissible to parse manuals into multiple files (of less than 5 MB) to meet this requirement. The statement of copyright release:

“REPRODUCTION AND DISTRIBUTION OF THIS TECHNICAL MANUAL IS

AUTHORIZED FOR UNITED STATES GOVERNMENT PURPOSES.”

shall be printed in the first two pages of each technical manual and on the surface of the CD/DVDs supplied.

4.7.2 Regardless of the technical manual/documentation type, all of the documents shall have the following statement of copyright release:

“REPRODUCTION AND DISTRIBUTION OF THIS TECHNICAL MANUAL IS

AUTHORIZED FOR UNITED STATES GOVERNMENT PURPOSES.”

4.8 Training Material:

4.8.1 Documentation: The equipment will be provided with basic operation and maintenance training.

Such material can be provided on non-volatile electronic medium at a minimum (CD, or DVD), and shall be accessible using freeware such as Adobe Reader® or similar. Flash drives (volatile memory medium) shall not be included with the equipment.

4.9 Calibration:

4.9.1 Methodology: The calibration and alignment procedure(s) and software will be provided with the equipment. Special or unique standards required to calibrate the equipment shall be identified in the maintenance manual.

4.9.2 Alignment codes: Any electronic or software codes necessary to communicate with, modify or provide alignment/realignment internal operating parameters or impose calibration correction factors on any proposed instrument model/modules shall be provided to the Government (at no cost).

4.9.3 Sensor calibration factors: The sensor shall be constructed so that it may be replaced by another internally calibrated sensor (of the same construction) without the need for recalibration of the indicating device.

4.10 Additional Requirements

4.10.1 Human Readable Identification Labeling:

4.10.1.1 Equipment: Per MIL-PRF-28800F, a human readable label shall be provided for all production lot units conforming with MIL-STD-130N and permanently affixed on the equipment in an easily readable location. Required fields on the label are; CAGE, part number, and serial number.

Size of the label shall conform to the size of the equipment.

4.10.1.2 Transit Case: Per MIL-PRF-28800F a human readable metal plate shall be provided for all production lot units conforming with MIL-STD-130N and permanently affixed to the front of the transit case. Required fields on the label are; CAGE, part number, and serial number. Size of the label shall conform to the size of the case. Pressure sensitive adhesive transfer tape is required to hold the plate to the hard transit case such as 3MTM 9472LE. Soft transit cases also require labeling with permanent placement such as a metal plate affixed with rivets, screws or adhesives.

4.10.2 Shipping container: For production lot units the package or carton containing the equipment for shipment shall be marked per MIL-STD-129P.

4.10.3 Other Additional Requirements: Shall be specified in the CDRL of the solicitation.