Information about http://josephhall.org/fec_vss_2002_pdf/pdf/v2s4.pdf
Volume II, Section 4 …
Tags: applicability, environmental tests, scope, table of contents, test conditions, test fixtures, test log, volume ii,Pages: 18
Language: english
Created: Tue Jun 8 11:16:37 2004
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Volume II, Section 4
Table of Contents
4 Hardware Testing .................................................................................................................................4-1
4.1 Scope ..............................................................................................................................................4-1
4.2 Basis of Hardware Testing ............................................................................................................4-1
4.2.1 Testing Focus and Applicability .......................................................................................... 4-1
4.2.2 Hardware Provided by Vendor............................................................................................ 4-2
4.3 Test Conditions...............................................................................................................................4-2
4.4 Test Log Data Requirements........................................................................................................4-3
4.5 Test Fixtures....................................................................................................................................4-3
4.6 Non-operating Environmental Tests .............................................................................................4-4
4.6.1 General ............................................................................................................................... 4-4
4.6.1.1 Pretest Data............................................................................................................... 4-5
4.6.1.2 Preparation for Test................................................................................................... 4-5
4.6.1.3 Mechanical Inspection and Repair............................................................................. 4-5
4.6.1.4 Electrical Inspection and Adjustment......................................................................... 4-5
4.6.1.5 Operational Status Check.......................................................................................... 4-5
4.6.1.6 Failure Criteria............................................................................................................ 4-6
4.6.2 Bench Handling Test .......................................................................................................... 4-6
4.6.2.1 Applicability................................................................................................................. 4-6
4.6.2.2 Procedure .................................................................................................................. 4-6
4.6.3 Vibration Test...................................................................................................................... 4-7
4.6.3.1 Applicability................................................................................................................. 4-7
4.6.3.2 Procedure .................................................................................................................. 4-7
4.6.4 Low Temperature Test....................................................................................................... 4-8
4.6.4.1 Applicability................................................................................................................. 4-8
4.6.4.2 Procedure .................................................................................................................. 4-8
4.6.5 High Temperature Test....................................................................................................... 4-9
4.6.5.1 Applicability................................................................................................................. 4-9
4.6.5.2 Procedure .................................................................................................................. 4-9
4.6.6 Humidity Test.................................................................................................................... 4-10
4.6.6.1 Applicability............................................................................................................... 4-10
4.6.6.2 Procedure ................................................................................................................ 4-10
i Volume II Section 4
Hardware Testing
4.7 Environmental Tests, Operating..................................................................................................4-11
4.7.1 Temperature and Power Variation Tests ......................................................................... 4-11
4.7.1.1 Data Accuracy.................................................................................................................. 4-12
4.7.2 Maintainability Test............................................................................................................ 4-13
4.7.3 Reliability Test................................................................................................................... 4-14
4.7.4 Availability Test ................................................................................................................. 4-14
4.8 Other Environmental Tests ..........................................................................................................4-15
4.8.1 Power Disturbance........................................................................................................... 4-15
4.8.2 Electromagnetic Radiation ............................................................................................... 4-15
4.8.3 Electrostatic Disruption .................................................................................................... 4-15
4.8.4 Electromagnetic Susceptibility ......................................................................................... 4-15
4.8.5 Electrical Fast Transient................................................................................................... 4-16
4.8.6 Lightning Surge................................................................................................................. 4-16
4.8.7 Conducted RF Immunity................................................................................................... 4-16
4.8.8 Magnetic Fields Immunity ................................................................................................. 4-16
ii Volume II Section 4
Hardware Testing
4 Hardware Testing
4.1 Scope
This section contains a description of the testing to be performed by the ITAs to
confirm the proper functioning of the hardware components of a voting system
submitted for qualification testing. It describes the scope and basis for functionality
testing, required test conditions for conducting hardware testing, guidance for the use
of test fixtures, test log data requirements, and test practices for specific non-operating
and operating environmental tests.
4.2 Basis of Hardware Testing
This section addresses the focus and applicability of hardware testing, and specifies
the vendor's obligations to produce hardware to conduct such tests.
4.2.1 Testing Focus and Applicability
ITAs shall design and perform procedures that test the voting system hardware
requirements identified in Volume I, Section 3. Test procedures shall be designed and
performed by the ITA for both operating and non-operating environmental tests:
Operating environmental tests apply to the entire system, including hardware
components that are used as part of the voting system telecommunications
capability; and
Non-operating tests apply to those elements of the system that are intended
for use at poll site voting locations, such as voting machines and precinct
counters. These tests address environmental conditions that may be
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encountered by the voting system hardware at the voting location itself, or
while in storage or transit to or from the poll site.
Additionally, compatibility of this equipment with the voting system environment shall
be determined through functional tests integrating the standard product with the
remainder of the system.
All hardware components custom-designed for election use shall be tested in
accordance with the applicable procedures contained in this section. Unmodified
COTS hardware will not be subject to all tests. Generally such equipment has been
designed to rigorous industrial standards and has been in wide use, permitting an
evaluation of its performance history. To enable reduced testing of such equipment,
vendors shall provide the manufacturers specifications and evidence that the
equipment has been tested to the equivalent of the Standards.
The specific testing procedures to be used shall be identified in the Qualification Test
Plan prepared by the ITA. These procedures may replicate testing performed by the
vendor and documented in the vendor's TDP, but shall not rely on vendor testing as a
substitute for hardware testing performed by the ITA.
4.2.2 Hardware Provided by Vendor
The hardware submitted for qualification testing shall be equivalent, in form and
function, to the actual production versions of the hardware units. Engineering or
developmental prototypes are not acceptable unless the vendor can show that the
equipment to be tested is equivalent to standard production units in both performance
and construction.
4.3 Test Conditions
Qualification tests may be performed in any facility capable of supporting the test
environment. Preparation for testing, arrangement of equipment, verification of
equipment status, and the execution of procedures shall be witnessed by at least one
independent, qualified observer who shall certify that all test and data acquisition
requirements have been satisfied.
When a test is to be performed at "standard" or "ambient" conditions, this requirement
shall refer to a nominal laboratory environment at prevailing atmospheric pressure and
relative humidity.
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Otherwise, all tests shall be performed at the required temperature and electrical
supply voltage, regulated within the following tolerances:
a. Temperature of +/- 4 degrees F; and
b. Electrical supply voltage +/- 2 VAC.
4.4 Test Log Data Requirements
The ITA shall maintain a test log of the procedure employed. This log shall identify the
system and equipment by model and serial number. Test environment conditions shall
be noted.
In the event that the ITA deems it necessary to deviate from requirements pertaining
to the test environment, the equipment arrangement and method of operation, the
specified test procedure, or the provision of test instrumentation and facilities, the
deviation shall be recorded in the test log. A discussion of the reasons for the deviation
and the effect of the deviation on the validity of the test procedure shall also be
provided.
4.5 Test Fixtures
The use of test fixtures or ancillary devices to facilitate hardware qualification testing
is encouraged. These fixtures and devices may include arrangements for automating
the operation of voting devices and the acquisition of test data.
The use of a fixture to ensure correctness in casting ballots by hand is recommended.
Such a fixture may consist of a template, with apertures in the desired location, so that
selections may be made rapidly. Such a template will eliminate or greatly minimize
errors in activating test ballot patterns, while reducing the amount of time required to
cast a test ballot.
For systems that use a light source as a means of detecting voter selections, the
generation of a suitable optical signal by an external device is acceptable. For systems
that rely on the physical activation of a switch, a mechanical fixture with suitable
motion generators is acceptable.
To speed up the process of testing and to eliminate human error in casting test ballots
the tests may use a simulation device with appropriate software. Such simulation is
recommended if it covers all voting data detection and control paths that are used in
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casting an actual ballot. In the event that only partial simulation is achieved, then an
independent method and test procedure must be used to validate the proper operation
of those portions of the system not tested by the simulator.
If the vendor provides a means of simulating the casting of ballots, the simulation
device is subject to the same performance, reliability, and quality requirements that
apply to the voting device itself so as not to contribute errors to the test processes.
4.6 Non-operating Environmental Tests
This section addresses a range of tests for voting machines and precinct counters, as
such devices are stored between elections and are transported between the storage
facility and polling site.
4.6.1 General
Environmental tests of non-operating equipment are intended to simulate exposure to
physical shock and vibration associated with handling and transportation of voting
equipment and precinct counters between a jurisdiction's storage facility and precinct
polling site. These tests additionally simulate the temperature and humidity conditions
that may be encountered during storage in an uncontrolled warehouse environment or
precinct environment. The procedures and conditions of these tests correspond
generally to those of MIL-STD-810D, "Environmental Test Methods and Engineering
Guidelines," 19 July 1983. In most cases, the severity of the test conditions has been
reduced to reflect commercial, rather than military, practice.
Systems exclusively designed with system-level COTS hardware whose configuration
has not been modified in any manner and are not subjected to this segment of
hardware testing. Systems made up of individual COTS components such as hard
drives, motherboards, and monitors that have been packaged to build a voting machine
or other device will be required to undergo the hardware testing.
Prior to each test, the equipment shall be shown to be operational by means of the
procedure contained in Subsection 4.6.1.5. The equipment may then be prepared as if
for actual transportation or storage, and subjected to appropriate test procedures
outlined. After each procedure has been completed, the equipment status will again be
verified as in Subsection 4.6.1.5.
The following requirements for equipment preparation, functional tests, and inspections
shall apply to each of the non-operating test procedures.
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4.6.1.1 Pretest Data
The test technician shall verify that the equipment is capable of normal operation.
Equipment identification, environmental conditions, equipment configuration, test
instrumentation, operator tasks, time-of-day or test time, and test results shall be
recorded.
4.6.1.2 Preparation for Test
The equipment shall be prepared as for the expected non-operating use, as noted
below. When preparation for transport between the storage site and the polling place is
required, the equipment shall be prepared with any protective enclosures or internal
restraints that the vendor specifies for such transport. When preparation for storage is
required, the equipment shall be prepared using any protective enclosures or internal
restraints that the vendor specifies for storage.
4.6.1.3 Mechanical Inspection and Repair
After the test has been completed, the devices shall be removed from their containers,
and any internal restraints shall be removed. The exterior and interior of the devices
shall be inspected for evidence of mechanical damage, failure, or dislocation of internal
components. Devices shall be adjusted or repaired, if necessary.
4.6.1.4 Electrical Inspection and Adjustment
After completion of the mechanical inspection and repair, routine electrical
maintenance and adjustment may be performed, according to the manufacturer's
standard procedure.
4.6.1.5 Operational Status Check
When all tests, inspections, repairs, and adjustments have been completed, normal
operation shall be verified by conducting an operational status check.
During this process, all equipment shall be operated in a manner and environmental
conditions that simulate election use to verify the functional status of the system. Prior
to the conduct of each of the environmental hardware non-operating tests, a
supplemental test shall be made to determine that the operational state of the
equipment is within acceptable performance limits.
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The following procedures shall be followed to verify the equipment status:
Step 1: Arrange the system for normal operation.
Step 2: Turn on power, and allow the system to reach recommended operating
temperature.
Step 3: Perform any servicing, and make any adjustments necessary, to achieve
operational status.
Step 4: Operate the equipment in all modes, demonstrating all functions and features
that would be used during election operations.
Step 5: Verify that all system functions have been correctly executed.
4.6.1.6 Failure Criteria
Upon completion of each non-operating test, the system hardware shall be subject to
functional testing to verify continued operability. If any portion of the voting machine or
precinct counter hardware fails to remain fully functional, the testing will be suspended
until the failure is identified and corrected by the vendor. The system will then be
subject to a retest.
4.6.2 Bench Handling Test
The bench handling test simulates stresses faced during maintenance and repair of
voting machines and ballot counters.
4.6.2.1 Applicability
All systems and components, regardless of type, shall meet the requirements of this
test. This test is equivalent to the procedure of MIL-STD-810D, Method 516.3,
Procedure VI.
4.6.2.2 Procedure
Step 1: Place each piece of equipment on a level floor or table, as for normal
operation or servicing.
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Step 2: Make provision, if necessary, to restrain lateral movement of the equipment
or its supports at one edge of the device. Vertical rotation about that edge
shall not be restrained.
Step 3: Using that edge as a pivot, raise the opposite edge to an angle of 45 degrees,
to a height of four inches above the surface, or until the point of balance has
been reached, whichever occurs first.
Step 4: Release the elevated edge so that it may drop to the test surface without
restraint.
Step 5: Repeat steps 3 and 4 for a total of six events.
Step 6: Repeat steps 2, 3, and 4 for the other base edges, for a total of 24 drops for
each device.
4.6.3 Vibration Test
The vibration test simulates stresses faced during transport of voting machines and
ballot counters between storage locations and polling places.
4.6.3.1 Applicability
All systems and components, regardless of type, shall meet the requirements of this
test. This test is equivalent to the procedure of MIL-STD-810D, Method 514.3,
Category 1- Basic Transportation, Common Carrier.
4.6.3.2 Procedure
Step 1: Install the test item in its transit or combination case as prepared for
transport.
Step 2: Attach instrumentation as required to measure the applied excitation.
Step 3: Mount the equipment on a vibration table with the axis of excitation along
the vertical axis of the equipment.
Step 4: Apply excitation as shown in MIL-STD-810D, Method 514.3-1, "Basic
transportation, common carrier, vertical axis", with low frequency excitation
cutoff at 10 Hz, for a period of 30 minutes.
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Step 5: Repeat steps 2 and 3 for the transverse and longitudinal axes of the
equipment with the excitation profiles shown in Figures 514.3-2 and 514.3-3,
respectively. (Note: The total excitation period equals 90 minutes, with 30
minutes excitation along each axis.)
Step 6: Remove the test item from its transit or combination case and verify its
continued operability.
4.6.4 Low Temperature Test
The low temperature test simulates stresses faced during storage of voting machines
and ballot counters.
4.6.4.1 Applicability
All systems and components, regardless of type, shall meet the requirements of this
test. This test is equivalent to the procedure of MIL-STD-810D, Method 502.2,
Procedure I-Storage. The minimum temperature shall be -4 degrees F.
4.6.4.2 Procedure
Step 1: Arrange the equipment as for storage. Install it in the test chamber.
Step 2: Lower the internal temperature of the chamber at any convenient rate, but
not so rapidly as to cause condensation in the chamber, and in any case no
more rapidly than 10 degrees F per minute, until an internal temperature of -
4 degrees F has been reached.
Step 3: Allow the chamber temperature to stabilize. Maintain this temperature for a
period of 4 hours after stabilization.
Step 4: Allow the internal temperature of the chamber to return to standard labo-
ratory conditions, at a rate not exceeding 10 degrees F per minute
Step 5: Allow the internal temperature of the equipment to stabilize at laboratory
conditions before removing it from the chamber.
Step 6: Remove the equipment from the chamber and from its containers, and
inspect the equipment for evidence of damage.
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Step 7: Verify continued operability of the equipment.
4.6.5 High Temperature Test
The high temperature test simulates stresses faced during storage of voting machines
and ballot counters.
4.6.5.1 Applicability
All systems and components, regardless of type, shall meet the requirements of this
test. This test is equivalent to the procedure of MIL-STD-810D, Method 501.2,
Procedure I-Storage. The maximum temperature shall be 140 degrees F.
4.6.5.2 Procedure
Step 1: Arrange the equipment as for storage. Install it in the test chamber.
Step 2: Raise the internal temperature of the chamber at any convenient rate, but in
any case no more rapidly than 10 degrees F per minute, until an internal
temperature of 140 degrees F has been reached.
Step 3: Allow the chamber temperature to stabilize. Maintain this temperature for a
period of 4 hours after stabilization.
Step 4: Allow the internal temperature of the chamber to return to standard labo-
ratory conditions, at a rate not exceeding 10 degrees F per minute.
Step 5: Allow the internal temperature of the equipment to stabilize at laboratory
conditions before removing it from the chamber.
Step 6: Remove the equipment from the chamber and from its containers, and
inspect the equipment for evidence of damage.
Step 7: Verify continued operability of the equipment.
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4.6.6 Humidity Test
The humidity test simulates stresses faced during storage of voting machines and ballot
counters.
4.6.6.1 Applicability
All systems and components regardless of type shall meet the requirements of this
test. This test is similar to the procedure of MIL-STD-810D, Method 507.2,
Procedure I-Natural Hot-Humid. It is intended to evaluate the ability of the equipment
to survive exposure to an uncontrolled temperature and humidity environment during
storage. This test lasts for ten days.
4.6.6.2 Procedure
Step 1: Arrange the equipment as for storage. Install it in the test chamber.
Step 2 Adjust the chamber conditions to those given in MIL-STD-
810D Table 507.2-I, for the time 0000 of the HotHumid
cycle (Cycle 1).
Step 3: Perform a 24-hour cycle with the time and temperature-
humidity values specified in Figure 507.2-1, Cycle 1.
Step 4: Repeat Step 2 until 5, 24-hour cycles have been completed.
Step 5: Continue with the test commencing with the conditions
specified for time = 0000 hours.
Step 6: At any convenient time in the interval between time = 120
hours and time = 124 hours, place the equipment in an
operational configuration, and perform a complete
operational status check as defined in Subsection
4.6.1.5
Step 7: If the equipment satisfactorily completes the status check,
continue with the sixth 24-hour cycle.
Step 8: Perform 4 additional 24-hour cycles, terminating the test at
time = 240 hours
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Step 9: Remove the equipment from the test chamber and inspect it
for any evidence of damage.
Step 10: Verify continued operability of the equipment.
4.7 Environmental Tests, Operating
This section addresses a range of tests for all voting system equipment, including
equipment for both precinct count and central count systems.
4.7.1 Temperature and Power Variation Tests
This test is similar to the low temperature and high temperature tests of MIL-STD-
810D, Method 502.2 and Method 501.2, with test conditions that correspond to the
requirements of the performance standards. This procedure tests system operation
under various environmental conditions for at least 163 hours. During 48 hours of this
operating time, the device shall be in a test chamber. For the remaining hours, the
equipment shall be operated at room temperature. The system shall be powered for the
entire period of this test; the power may be disconnected only if necessary for removal
of the system from the test chamber.
Operation shall consist of ballot-counting cycles, which vary with system type. An
output report need not be generated after each counting cycle; the interval between
reports, however, should be no more than 4 hours to keep to a practical minimum the
time between the occurrence of a failure or data error and its detection.
Test Ballots per Counting Cycle
Precinct count systems 100 ballots/hour
Central count systems 300 ballots/hour
The recommended pattern of votes is one chosen to facilitate visual recognition of the
reported totals; this pattern shall exercise all possible voting locations. System features
such as data quality tests, error logging, and audit reports shall be enabled during the
test.
Each operating cycle shall consist of processing the number of ballots indicated in the
preceding chart.
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Step 1: Arrange the equipment in the test chamber. Connect as required and
provide for power, control and data service through enclosure wall.
Step 2: Set the supply voltage at 117 vac.
Step 3: Power the equipment, and perform an operational status check as in Section
4.6.1.5.
Step 4: Set the chamber temperature to 50 degrees F observing precautions against
thermal shock and condensation.
Step 5: Begin 24 hour cycle.
Step 6: At T=4 hrs, lower the supply voltage to 105 vac.
Step 7: At T=8 hrs, raise the supply voltage to 129 vac.
Step 8: At T=11:30 hrs, return the supply voltage to 117 vac and return the chamber
temperature to lab ambient, observing precautions against thermal shock and
condensation.
Step 9: At T=12:00 hrs, raise the chamber temperature to 95 degrees Fahrenheit.
Step 10: Repeat Steps 5 through 8, with temperature at 95 degrees Fahrenheit,
complete at T=24 hrs.
Step 11: Set the chamber temperature at 50 degrees Fahrenheit as in Step 4.
Step 12: Repeat the 24 hour cycle as in Steps 5-10, complete at T=48 hrs.
Step 13: After completing the second 24 hour cycle, disconnect power from the
system and remove it from the chamber if needed.
Step 14: Reconnect the system as in Step 2, and continue testing for the remaining
period of operating time required until the ACCEPT/REJECT criteria of
Subsection 4.7.11 have been met.
4.7.1.1 Data Accuracy
As indicated in Volume I, Section 3, data accuracy is defined in terms of ballot position
error rate. This rate applies to the voting functions and supporting equipment that
capture, record, store, consolidate and report the specific selections, and absence of
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Hardware Testing
selections, made by the voter for each ballot position. Volume I, Section 3.2.1 identifies
the specific functions to be tested.
For each processing function, the system shall achieve a target error rate of no more
than one in 10,000,000 ballot positions, with a maximum acceptable error rate in the
test process of one in 500,000 ballot positions. This error rate includes errors from any
source while testing a specific processing function and it related equipment.
This error rate is used to determine the vote position processing volume used to test
system accuracy for each function:
If the system makes one error before counting 26,997 consecutive ballot
positions correctly, it will be rejected. The vendor is then required to improve
the system.
If the system reads at least 1,549,703 consecutive ballot positions correctly, it
will be accepted.
If the system correctly reads more than 26,997 ballot positions but less than
1,549,703 when the first error occurs, the testing will have to be continued until
another 1,576,701 consecutive ballot positions are counted without error (a
total of 3,126,404 with one error).
Volume II, Appendix C, Section C.5 provides further details of the calculation for this
testing volume.
4.7.2 Maintainability Test
The ITA shall test for maintainability based on the provisions of Volume I, Section 3
for maintainability, including both physical attributes and additional attributes regarding
the ease of performing maintenance activities. These tests include:
a. Examine the physical attributes of the system to determine whether significant
impediments exist for the performance of those maintenance activities that are
to be performed by the jurisdiction. These activities shall be identified by the
vendor in the system maintenance procedures (part of the TDP).
b. Performing activities designated as maintenance activities for the jurisdiction in
the TDP, in accordance with the instructions provided by the vendor in the
system maintenance procedures, noting any difficulties encountered.
Should significant impediments or difficulties be encountered that are not remedied by
the vendor, the ITA shall include such findings in the qualification test results of the
qualification test report.
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4.7.3 Reliability Test
The ITA shall test for reliability based on the provisions of Volume I, Section 3 for the
acceptable mean time between failure (MBTF). The MBTF shall be measured during
the conduct of other system performance tests specified in this section, and shall be at
least 163 hours. Volume II, Appendix C, Section C.4 provides further details of the
calculation for this testing period.
4.7.4 Availability Test
The ITA shall assess the adequacy of system availability based on the provisions of
Volume I, Section 3. As described in this section, availability of voting system
equipment is determined as a function of reliability, and the mean time to repair the
system in the event of failure.
Availability cannot be tested directly before the voting system is deployed in
jurisdictions, but can be modeled mathematically to predict availability for a defined
system configuration. This model shall be prepared by the vendor, and shall be
validated by the ITA.
The model shall reflect the equipment used for a typical system configuration to
perform the following system functions:
a. For all paper-based systems:
1) Recording voter selections (such as by ballot marking or punch);
2) Scanning the punches or marks on paper ballots and converting them into
digital data;
b. For all DRE systems:
1) Recording and storing the voter's ballot selections.
c. For precinct-count systems (paper-based and DRE):
1) Consolidation of vote selection data from multiple precinct-based systems
to generate jurisdiction-wide vote counts, including storage and reporting
of the consolidated vote data; and
d. For central-count systems (paper-based and DRE):
1) Consolidation of vote selection data from multiple counting devices to
generate jurisdiction-wide vote counts, including storage and reporting of
the consolidated vote data.
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The model shall demonstrate the predicted availability of the equipment that supports
each function. This demonstration shall reflect the equipment reliability, mean time to
repair and assumptions concerning equipment availability and deployment of
maintenance personnel stated by the vendor in the TDP.
4.8 Other Environmental Tests
4.8.1 Power Disturbance
The test for power disturbance disruption shall be conducted in compliance with the
test specified in in IEC 61000-4-11 (1994-06).
4.8.2 Electromagnetic Radiation
The test for electromagnetic radiation shall be conducted in compliance with the FCC
Part 15 Class B requirements by testing per ANSI C63.4.
4.8.3 Electrostatic Disruption
The test for electrostatic disruption shall be conducted in compliance with the test
specified in IEC 61000-4-2 (1995-01).
4.8.4 Electromagnetic Susceptibility
The test for electromagnetic susceptibility shall be conducted in compliance with the
test specified in IEC 61000-4-3 (1996).
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4.8.5 Electrical Fast Transient
The test for electrical fast transient protection shall be conducted in compliance with
the test specified in IEC 61000-4-4 (1995-01).
4.8.6 Lightning Surge
The test for lightning surge protection shall be conducted in compliance with the test
specified in IEC 61000-4-5 (1995-02).
4.8.7 Conducted RF Immunity
The test for conducted RF immunity shall be conducted in complia nce with the test
specified in IEC 61000-4-6 (1996-04).
4.8.8 Magnetic Fields Immunity
The test for AC magnetic fields RF immunity shall be conducted in compliance with
the test specified in IEC 61000-4-8 (1993-06).
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