Specifications

EMC-CS-2009.1
© Copyright Ford Motor Company – All Rights Reserved Page 47 of 121
February 11, 2010
12.2 Test Verification and Test Setup
Verification of component performance shall be verified using the test method delineated in MIL-STD-461E, RS101
except where noted in this specification. The test setup shall be configured to facilitate direct exposure of the DUT to the
fields listed in Figure 12-1 in addition to magnetic field exposure to any magnetic sensors that may be connected to the
DUT. This may be accomplished using either
of the following devices:
 120 mm diameter magnetic radiating loop with self resonance greater than 100 kHz (e.g. ETS Lindgren Model
7603).
 Helmholtz coil with self resonance greater than 100 kHz (e.g. ETS Lindgren Model 6402M).
The respective test setup configurations are illustrated in Figure 12-2 and 12-3. Testing shall be performed at the
frequencies listed in Table 12-1. For either test method, the loop current shall only be monitored by a current probe with
sufficient bandwidth (use of shunt resistors are not permitted).
Table 12-1: RI 140 Test Frequency Requirements
Test Frequency Range (kHz) Frequency Step (kHz)
.05 -1 .05
> 1 – 10 0.5
> 10 - 100 5
The DUT shall be placed on a wooden table or insulated table for either test method. The Load Simulator and other
support equipment shall be mounted to a ground plane; however no portion of the Load Simulator or ground plane shall be
closer than 200 mm to the radiating loop or Helmholtz coils.
The DUT and any electronic hardware in the Load Simulator shall be powered from an automotive battery or a linear
power supply (see paragraph 4.5.4 for requirements). The battery or power supply negative terminal shall be connected to
the ground plane bench. The battery/power supply shall be placed on the floor below or adjacent to the test bench.
12.3 Test Procedures
The DUT operating mode(s) exercised during testing shall conform to that delineated in the EMC test plan.
12.3.1 Radiating Loop Method
a) Prior to performing testing of the DUT, calibrate the radiation loop using procedures delineated in MIL-STD-461E,
RS101.
b)
Partition each face of the DUT into 100 x 100 mm square areas and position the radiating loop face to the center of
each of these areas. If the DUT face is less than 100 x 100 mm, place the radiating loop in the center of the DUT face.
Separation between the face of the radiating loop and DUT surface shall be 50 mm. Orient the plane of the loop
sensor parallel to the DUT faces and parallel to the axis of any connector.
c)
At each position, supply the loop with sufficient current to produce the corresponding magnetic field levels delineated
in Figure 12-1 at each test frequency step listed in Table 12-1.
d)
Dwell time shall be at least 2 seconds. A longer dwell time may be necessary if DUT function response times are
expected to be longer. This information shall be documented in the EMC test plan.
e)
If deviations are observed, the field shall be reduced until the DUT functions normally. Then the field shall be
increased until the deviation occurs. This level shall be reported as deviation threshold.
f)
If the DUT has magnetic sensors attached to it, separate tests shall be performed exposing only the sensor while
verifying correct operation of the DUT (see Figure 12-2).