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Engineering Report 58687-3

Dust Test for Seahorse Protective Equipment Cases

Prepared by Nicole T. Duff, Technical Writer

Rachel A. Thompson, Associate Test Engineer

Approved by

David M. Gillen, Senior Program Manager

This document shall not be reproduced, except in full, without express written authorization of Element Minneapolis.

In the event this document is provided to the customer in any format that may be modified or copied in any part, no

modifications, changes, or additions to this report, nor any summary hereof, shall be permitted in any manner. All original

content of this document shall be considered one entire report. Element Minneapolis shall not be liable to the customer or

to any third party for unauthorized modification or misuse of this document.

EAR-controlled data:

This document contains technical data whose export and re-export/re-transfer is subject to control by the U.S. Department

of Commerce under the Export Administration Act and the Export Administration Regulations. The Department of

Commerce’s prior written approval may be required for the export or re-export/re-transfer of such technical data to any

foreign person, foreign entity, or foreign organization whether in the United States or abroad.

Element Materials Technology Minneapolis LLC (A subsidiary of Element Materials Technology Minneapolis Inc.)

9725 Girard Avenue South Minneapolis, MN 55431 952-888-7795 800-826-3710 www.element.com

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Revision history

Revision Total pages Date Description

-- 14 June 12, 2019 Original

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Prepared for Seahorse Protective Equipment Cases

Attention Flavio Valencia Test number 58687-3

Test start 6/5/2019 Test completion 6/7/2019

PO number 22660 Purchase date 2/12/2019

Dust Test 1.0 Abstract

1.1 Object

Subject two Seahorse Cases to a Dust Test as specified in IEC 60529, Edition 2.2, dated August 2013, Section 13.4, Category 1, IP6X, as requested in Seahorse Protective Equipment Cases purchase order 22660, dated February 12, 2019.

1.2 Conclusions No dust intrusion inside either test unit was observed upon completion of the test. Any dust observed in post-test photographs is due to opening the test units.

2.0 Unit(s) tested

Table 2-1: Units tested

Manufacturer Seahorse Protective Equipment Cases

Device Two (2) Seahorse Cases

Model/part number 230 530

Serial number N/A N/A

Sample identifier UUT-58687-2 UUT-58687-3

The results of this test apply only to the units identified in this Engineering Report by device identifier and model / part number, or serial number.

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3.0 Test requested Subject two Seahorse Cases to a Dust Test as specified in IEC 60529, Edition 2.2, dated August 2013, Section 13.4, Category 1, IP6X. The test is made using a dust chamber incorporating the basic principles shown in Figure 3-1 (IEC 60529, Figure 2) whereby the powder circulation pump may be replaced by other means suitable to maintain the talcum powder in suspension in a closed test chamber. The talcum powder used shall be able to pass through a square-meshed sieve the nominal wire diameter of which is 50 μm and the nominal width of a gap between wires 75 μm. The amount of talcum powder to be used is 2 kilograms (kg) per cubic meter of the test chamber volume. It shall not have been used for more than 20 tests. Category 1: Enclosures where the normal working cycle of the equipment causes

reductions in air pressure within the enclosure below that of the surrounding air, for example, due to thermal cycling effects.

Procedure for Category 1 enclosures

The enclosure under test is supported inside the test chamber, and the pressure inside the enclosure is maintained below the surrounding atmospheric pressure by a vacuum pump. The suction connection shall be made to a hole specially provided for this test. If not otherwise specified in the relevant product standard, this hole shall be in the vicinity of the vulnerable parts.

If it is impracticable to make a special hole, the suction connection shall be made to the cable inlet hole. If there are other holes (for example, more cable inlet holes or drain-holes) these shall be treated as intended for normal use on site.

The object of the test is to draw into the enclosure, by means of depression, a volume of air 80 times the volume of the sample enclosure tested without exceeding the extraction rate of 60 volumes per hour. In no event shall the depression exceed 2 kPa (20 mbar) on the manometer shown in Figure 3-1 (IEC 60529, Figure 2).

If an extraction rate of 40 to 60 volumes per hour is obtained, the duration of the test is 2 hours. If with a maximum depression of 2 kPa (20 mbar) the extraction rate is less than 40 volumes per hour, the test is continued until 80 volumes have been drawn through or a period of 8 hours has elapsed. Acceptance criteria

The protection is satisfactory if no deposit of dust is observable inside the enclosure at the end of the test.

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Figure 3-1: Test device to verify protection against dust (dust chamber) (IEC 60529, Figure 2)

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4.0 Instrumentation, procedure performed, and results 4.1 Instrumentation

All instrumentation is calibrated regularly by instruments directly traceable to the National Institute of Standards and Technology, and in accordance with ANSI/NCSL Z540.3-2006, and ISO/IEC 17025: 2005.

Table 4-1: Instrumentation list

Equipment Number Description Manufacturer

Model Number

Last Calibration

Due Calibration Range

186-004CL Talc Powder Powder Technology Inc

#399 Talc N/A N/A See Certificate of Conformance

380-559 DC Power Supply Hewlett Packard

6234A N/A N/A 0 to 30 Vdc; 0 to 0.25 A

400-060 Stopwatch Extech Instruments

365510 10/16/2018 10/16/2020 0 to 23 hrs, 59 mins, 59 sec

504-019 Dust Chamber Environ D-4 N/A N/A N/A

710-337 Differential Pressure Gage

Dwyer Instruments

2015 1/24/2018 1/24/2020 0 to 15 in. H2O

717-140 Flowmeter Dwyer Instruments

RMA-22-APF-TMV

1/24/2018 1/24/2020 2 to 25 L/min air

717-141 Flowmeter Dwyer Instruments

RMA-26-APF-TMV

1/24/2018 1/24/2020 0.5 to 5.0 L/min air

717-142 Flowmeter Dwyer Instruments

RMA-12-APF-TMV

1/24/2018 1/24/2020 50 to 500 cc/min air

730-017 Digital Weight Indicator / Bench Scale

Rice Lake Weighing Systems

BM1212SB-100/IQ355

7/16/2018 7/16/2019 0 to 100 lbs; 0 to 50 Kg

4.2 Procedure

Each test unit was tested individually. Test unit UUT-58687-2 was placed on the mounting rack inside the dust chamber. A line to the vacuum pump was connected to the unit. The internal unit pressure was reduced by 2 kPa (8 in-H2O), and the leak rate was measured. No measurable flow was detected. Talcum powder that meets the requirements of IEC 60529 was used for the test. The amount of talcum powder used was 2 kg per cubic meter of test chamber volume. The chamber was sealed. The vacuum was adjusted for a 2 kPa depression within the test unit. The dust activation system was started. The test was conducted for 8 hours. At the completion of the exposure, the test unit was removed from the chamber and inspected for dust penetration. The procedure outlined above was repeated with test unit UUT-58687-3.

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4.3 Results No dust intrusion inside either test unit was observed upon completion of the test. Any dust observed in post-test photographs is due to opening the test units. The test units were retained at Element Minneapolis. Test data and photographs are included in the following pages.

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Figure 4-1: Dust Test data sheet

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Photograph 4-1: Test unit identification

Photograph 4-2: Test unit UUT-58687-2 in chamber pretest

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Photograph 4-3: Test unit UUT-58687-2 in chamber post-test

Photograph 4-4: Test unit UUT-58687-2 post-test

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Photograph 4-5: Test unit UUT-58687-2 post-test

Photograph 4-6: Test unit UUT-58687-2 post-test

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Photograph 4-7: Test unit UUT-58687-3 in chamber pretest

Photograph 4-8: Test unit UUT-58687-3 in chamber post-test

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Photograph 4-9: Test unit UUT-58687-3 post-test

Photograph 4-10: Test unit UUT-58687-3 post-test

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Photograph 4-11: Test unit UUT-58687-3 post-test

Photograph 4-12: Test unit UUT-58687-3 post-test