MIL-PRF-25439C
(ASTM documents may be obtained online at https://www.astm.org/ or from American Society
for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.)
SAE INTERNATIONAL
SAE-ARP8615
- Fuel System Components: General Specification
for
SAE-AS31061
- Connector, Plug, Electric, Straight, Solder
Contacts AN Type
SAE-AS31081
- Connectors, Plug, Electric, Solder Contact, 90
Degree, AN Type
(SAE documents may be obtained online at https://www.sae.org/ or from SAE International
Headquarters, 400 Commonwealth Drive, Warrendale, PA 15096-0001 USA.)
2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a
conflict between the text of this document and the references cited herein, the text of this document
takes precedence. Nothing in this document, however, supersedes applicable laws and regulations
unless a specific exemption has been obtained.
3. REQUIREMENTS
3.1 First article. When specified (see 6.2), a sample shall be subjected to first article
inspection in accordance with 4.1 and 4.3.
3.2 Function. The transmitter shall be designed to provide an electrical output signal for
a fuel flow range of 0 to 10,000 pounds per minute (ppm). The signal shall be suitable for remote
indication and for use in operating an EFU-20/A indicator conforming to MIL-PRF-38120.
3.3 Design and Construction.
3.3.1 Output signal. The electrical signal shall be single phase, 400 Hertz, AC voltage.
The magnitude of the voltage shall be 1 V per 1,00 ppm fuel flow. The electrical output signal
shall have a carrier frequency identical to the input power frequency. The output voltage signal
shall be at a leading phase angle of 15° with respect to the input voltage.
3.3.2 Excess flow. The transmitter shall not be damaged by fuel flow rates in excess of
the rated value provided the pressure rating of the transmitter is not exceeded.
3.3.3 Fuel variations. The transmitter shall be designed to operate satisfactorily when
using fuel having any of the variations in standard characteristics specified in MIL-DTL-5624
and ASTM-D910.
3.3.4 Operating pressure. The transmitter shall be designed for a normal operating
pressure of 120 psi, a proof pressure of 240 psi, and a burst pressure of 480 psi.
3
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