A-A-50718 Test Set, Fuel SystemThis Commercial Item Description, CID, describes an AC Fuel Quantity Test Set based on Bridge Capacitance/Resistance Test Set BC/RFGTS technology herein referred to as test set. This CID describes a minimum requirement for the test set in which only those manufactures that meet or exceed the following requirements are qualified per this CID.

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A-A-50718A

2.2.6   Salt Exposure.  Salt exposure verification testing shall not be required.

2.2.7   Temperature   Operating.      The   test   set   shall   meet   its   performance   and   accuracy requirements in a minimum operating environment of -20°C to +55°C.

2.2.8   Relative Humidity.  The equipment shall meet its performance and accuracy requirements while being operated in a non-condensing humidity range of s 30% to > 70%.

2.2.9   Random Vibration.  The equipment shall conform to the random vibration requirements of

MIL-PRF-28800 Class 3.

2.2.10 Transit Drop.  The equipment shall conform to the transit drop requirements of MIL-PRF-

28800 Class 3.

2.2.11 Warm Up Time.  The test set warm up time shall be s 30 minutes.

2.2.12 Environmental Changes.  Changes in environmental conditions within the operating range of the test set will not require additional calibration, except for internal calibration procedures and signal path compensation, to meet performance requirements.

2.3        Electrical  Power  Sources.   The  test  set  shall  operate  from nominal  commercial,  military, and shipboard power sources as specified herein.

2.3.1   Single Phase, 120 Vrms.  The test set shall operate at 120 Vrms, single phase AC (±10%)

at  line  frequencies  of   50  Hz,  60  Hz,  and 400 Hz (±5%) in accordance with MIL-PRF-28800

Steady-State   Conditions,   Transient-State   Conditions,   and   Interruption   of   Power   Source requirements.

2.3.2   Single  Phase,  240  Vrms.    The  test  set  shall  operate  at  240  Vrms  AC  (±10%)  at  line frequencies  of  50  Hz  and  60  Hz  (±5%)  in  accordance  with  MIL-PRF-28800  Steady-State Conditions, Transient-State Conditions, and Interruption of Power Source requirements.

2.3.3   DC Internal Power Source.  The test set shall operate from an internal DC power source in accordance with MIL-PRF-28800.  The internal DC power source shall provide operating power when  AC  power  is  not  available  (i.e.  flight  line  use).   The  internal  DC  power  source  may  be either rechargeable or non-rechargeable and shall meet the specifications herein.   Replacement of  the  DC  internal  power  source  shall  not  void  or  require  calibration  of  the  test  set.  The  DC power source shall be commercially available.

2.3.3.1  Rechargeable Internal DC Power Source.  The test set shall provide a means of charging the internal power source.  The rechargeable DC internal power source shall provide a minimum of 8 hours of continuous operation of the unit within all specification requirements.

2.3.3.1.1  Recharge Time.   The charger circuitry shall be such that a condition of charge which shall  permit  full  continuous  use  of  the  unit,  within  all  specification  requirements,  shall  be reached in no more than twelve hours following a low DC source indication.  Under no condition of discharge shall the charging rate applied to the rechargeable DC internal power source exceed the manufacturer's recommended maximum rate, nor shall an indefinite charging period result in any damage to the rechargeable DC internal power source or any other components.

Source:  https://assist.dla.mil  --  D2ownloaded:  2014-09-26T08:46Z Check  the  source  to  verify  that  this  is  the  current  version  before  use.