SIST EN 341:2011
Personal fall protection equipment - Descender devices for rescue
Personal fall protection equipment - Descender devices for rescue
This European Standard specifies requirements, test methods, marking and information to be supplied by the manufacturer for descender devices, including descent lines intended solely for rescue, to be used in conjunction with other equipment, e. g. full body harnesses (EN 361), rescue harnesses (EN 1497). This European Standard does not specify requirements for descender devices that are used for purposes other than rescue, e.g. mountaineering, rope access and work positioning systems. Descender devices may be designed for the use of one or two persons simultaneously.
Persönliche Absturzschutzausrüstung - Abseilgeräte zum Retten
Diese Europäische Norm legt Anforderungen, Prüfverfahren, Kennzeichnung und Informationen des Herstellers für Abseilgeräte, einschließlich Abseilseile bzw. Abseilbänder (im Folgenden kurz als „Tragmittel” bezeichnet), die ausschließlich zur Rettung vorgesehen sind, fest; die Abseilgeräte sind in Verbindung mit anderen Ausrüstungen einzusetzen, z. B. mit Auffanggurten (EN 361) oder Rettungsgurten (EN 1497). Diese Europäische Norm legt keine Anforderungen für Abseilgeräte fest, die zu anderen Zwecken als der Rettung benutzt werden, z. B. im Bergsport, bei seilunterstützten Arbeiten oder bei Systemen der Arbeitsplatzpositionierung. Abseilgeräte können für die Benutzung durch eine Person oder für die gleichzeitige Benutzung durch zwei Personen konstruiert sein.
ANMERKUNG Abseilgeräte in Übereinstimmung mit dieser Norm dürfen mit anderen Bestandteilen oder Teilsystemen, z. B. Rettungshubgeräten der Klasse A (EN 1496), kombiniert werden.
Équipement de protection individuelle contre les chutes - Descendeurs pour sauvetage
La présente Norme européenne prescrit les exigences, les méthodes d’essai, le marquage et les informations à fournir par le fabricant (notice d’information du fabricant) relatifs aux descendeurs, lesquels comprennent les supports d’assurage pour la descente (appelés ci-après supports d’assurage), destinés au sauvetage et à assurer une protection contre les chutes dans un système de sauvetage, qui constitue un système de protection individuelle contre les chutes. La présente Norme européenne ne spécifie aucune exigence concernant les descendeurs qui sont utilisés en alpinisme/en escalade ou avec les systèmes d'accès par corde ou de maintien au poste de travail.
NOTE Un descendeur qui permet à l'utilisateur de se sauver lui-même et qui est conforme à la présente Norme européenne est un équipement de protection individuelle (EPI).
Osebna varovalna oprema za zaščito pred padci z višine - Naprave za spuščanje ob reševanju
Ta evropski standard določa zahteve, preskusne metode, označevanje in informacije, ki jih mora zagotoviti proizvajalec za naprave za spuščanje, vključno z vodom za spuščanje, namenjenim izključno za reševanje, ki se uporabljajo v povezavi z drugo opremo, npr. pasovi za celo telo (EN 361), reševalnimi pasovi (EN 1497). Ta evropski standard ne določa zahtev za naprave za spuščanje, ki se uporabljajo za druge namene kot reševanje, npr. za gorništvo, dostopanje z vrvjo in delovne namestitvene sisteme. Naprave za spuščanje so lahko namenjene uporabi za eno ali dve osebi hkrati.
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Persönliche Absturzschutzausrüstung - Abseilgeräte zum RettenÉquipement de protection individuelle contre les chutes - Descendeurs pour sauvetagePersonal fall protection equipment - Descender devices for rescue13.340.60Protection against falling and slippingICS:Ta slovenski standard je istoveten z:EN 341:2011SIST EN 341:2011en01-december-2011SIST EN 341:2011SLOVENSKI
STANDARDSIST EN 341:2002SIST EN 341:2002SIST EN 341:1996/AC:19981DGRPHãþD
SIST EN 341:2011
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 341
June 2011 ICS 13.340.99 Supersedes EN 341:1992English Version
Personal fall protection equipment - Descender devices for rescue
Équipement de protection individuelle contre les chutes - Descendeurs pour sauvetage
Persönliche Absturzschutzausrüstung - Abseilgeräte zum Retten This European Standard was approved by CEN on 25 May 2011.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 341:2011: ESIST EN 341:2011
EN 341:2011 (E) 2 Contents Page Foreword .31Scope .42Normative references .43Terms, definitions and classes .43.1Terms and definitions .43.2Classes .54Requirements .64.1General .64.2Design, materials and construction .64.3Dynamic strength.74.4Function .84.5Descent energy .84.6Static strength .94.7Corrosion resistance .94.8Additional requirements for manually-operated descender devices (type 2) .94.9Additional requirements for descender devices, class D.94.10Marking and information .95Test methods .95.1Test samples .95.2Examination of design . 105.3Dynamic strength test . 105.4Function tests . 125.5Descent energy test . 155.6Static strength test . 175.7Operating force test . 185.8Holding force test . 185.9Line integrity test . 185.10Corrosion resistance test . 196Marking . 197Information supplied by the manufacturer . 20Annex A (informative)
Significant technical changes between this European Standard and EN 341:1992 . 21 Figures Figure 1 — Dynamic strength test for descender devices that normally travel with the user . 11 Figure 2 — Dynamic strength test for descender devices that normally do not travel with the user . 12 Figure 3 — Example of test apparatus for test of integrity of lines and for descent energy of an
automatic descender device (type 1) . 16 Figure 4 — Example of test apparatus for test of integrity of lines and for descent energy of a
manually-operated descender device (type 2) . 17
SIST EN 341:2011
EN 341:2011 (E) 3 Foreword This document (EN 341:2011) has been prepared by Technical Committee CEN/TC 160 “Protection against falls from a height including working belts”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2011, and conflicting national standards shall be withdrawn at the latest by December 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 341:1992. Annex A provides details of significant technical changes between this European Standard and EN 341:1992. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. SIST EN 341:2011
EN 341:2011 (E) 4 1 Scope This European Standard specifies requirements, test methods, marking and information to be supplied by the manufacturer for descender devices, which include descent lines (hereinafter referred to as lines), intended for rescue and to protect against falls in a rescue system, which is a personal fall protection system. This European Standard does not specify requirements for descender devices that are used for descending in mountaineering, rope access or work positioning systems. NOTE A descender device which enables the user to rescue himself and which conforms to this European Standard is personal protective equipment (PPE). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 362, Personal protective equipment against falls from a height — Connectors EN 363:2008, Personal fall protection equipment — Personal fall protection systems
EN 364:1992, Personal protective equipment against falls from a height — Test methods EN 365:2004, Personal protective equipment against falls from a height — General requirements for instructions for use, maintenance, periodic examination, repair, marking and packaging EN 1496:2006, Personal fall protection equipment — Rescue lifting devices EN 1891:1998, Personal protective equipment for the prevention of falls from a height — Low stretch kernmantel ropes EN 12385-1, Steel wire ropes — Safety — Part 1: General requirements
EN ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests (ISO 9227:2006) 3 Terms, definitions and classes For the purposes of this document, the terms and definitions of EN 363:2008 and the following apply. 3.1 Terms and definitions 3.1.1 descender device automatic (type 1) or manually-operated (type 2) device, including a line, by which persons can, at a limited velocity, rescue themselves or others from a higher to a lower position in such a way that a free fall is prevented NOTE
A line could be e.g. wire rope, textile rope, or webbing. 3.1.1.1 automatic descender device (type 1) descender device with a braking system that does not require an intervention by the user once the descent has commenced SIST EN 341:2011
EN 341:2011 (E) 5 3.1.1.2 manually-operated descender device (type 2) descender device with a braking system that requires an intervention by the user 3.1.1.3 control device integral element of the descender device normally operated by hand, used to control the velocity of descent down the line 3.1.1.4 panic locking element integral part or function of the control device which stops or slows down the descent and thereby prevents an uncontrolled descent or a fall if the user panics and operates the descender device beyond its intended control parameters 3.1.2 descent energy energy measured in joules and expressed as W, which results from the product of the descent load, the gravity, the descent height and the number of descents NOTE
Descent energy W = m × g × h × n
where
W
is the descent energy, expressed in joules (J);
m
is the descent load, expressed in kilograms (kg);
g
is the gravity 9,81 m/s2;
h
is the descent height, expressed in metres (m);
n
is the number of descents. 3.1.3 minimum rated load minimum mass of the person(s), including tools and equipment, for the descender device, as specified by the manufacturer
NOTE Minimum rated load is expressed in kilograms. 3.1.4 maximum rated load maximum mass of the person(s), including tools and equipment, for the descender device, as specified by the manufacturer
NOTE Maximum rated load is expressed in kilograms. 3.2 Classes Descender devices are classified as follows: a) class A: descent energy W
up to 7,5 × 106 J; b) class B: descent energy W
up to 1,5 × 106 J; c) class C: descent energy W
up to 0,5 × 106 J; SIST EN 341:2011
EN 341:2011 (E) 6 d) class D: For only one descent. Descent energy depends on the maximum descent height and the maximum rated load. NOTE In practice, descender devices are subjected to different loads. A descender device for descending, e. g. 100 passengers from a cable car at a height of 100 m, has to meet more severe requirements than a descender device used by a crane driver to descend by himself from a height of 20 m only once. 4 Requirements 4.1 General 4.1.1 Minimum rated load The minimum rated load shall be specified by the manufacturer. 4.1.2 Maximum rated load The maximum rated load shall be specified by the manufacturer and shall be at least 100 kg.
4.2 Design, materials and construction 4.2.1 General Materials which may come into contact with the skin of a user shall not be known to, or suspected to, adversely affect user hygiene or health, e.g. cause irritating or sensitization effects, during normal use of the descender device. Descender devices shall not have sharp or rough edges that may cut, abrade or otherwise damage rope or webbing or cause injury to the user.
When descender devices in accordance with this standard have a rescue lifting function, they shall in addition to this European Standard conform to EN 1496:2006, class A. Connectors shall conform to EN 362. 4.2.2 Lines Lines shall be made from steel or stainless steel wire rope, textile rope or webbing. Lines shall have at least one termination. Line ends that do not have a termination shall have an end stop. The ends of the lines shall be protected against slipping through the descender device unintentionally.
Lines including their termination(s) shall be of a type capable of visual inspection or else subject to manufacturers' guidance for appropriate examination. 4.2.2.1 Wire rope lines Wire rope lines shall be made from one piece and shall be stress and torsion relieved.
Wire rope lines made from steel except stainless steel shall be galvanized to EN 12385-1. The nominal tensile strength of the wires of the steel or stainless steel wire rope shall not exceed 1960 N/mm2. SIST EN 341:2011
EN 341:2011 (E) 7 NOTE 1 A limit of the nominal tensile strength is necessary, because the wires become too brittle with a higher nominal tensile strength. NOTE 2 Manufacturers of descender devices should be particularly careful when selecting lines made from stainless steel as some types of stainless steel can have unpredictable fatigue and corrosion characteristics.
4.2.2.2 Textile rope lines Textile rope lines for descender devices, class A, B or C shall be of kernmantel construction and shall conform to EN 1891:1998, type A, 4.1 to 4.10.
4.2.2.3 Webbing lines Webbing lines shall meet the requirements of EN 1891:1998, 4.5, 4.6 and 4.10. Webbing lines shall be made from virgin filament or multi-filament synthetic fibres suitable for the use intended. The breaking tenacity of the synthetic fibre shall be known to be at least 0,6 N/tex.
The materials used for the construction of the webbing line shall be known to have a melting point of more than 195 °C. Webbing lines made from polypropylene or polyethylene shall not be used. 4.2.2.4 Line integrity When tested in accordance with 5.9, lines made of stainless steel wire rope or made of textiles containing aramid fibres shall withstand a test force as given in 4.6, applied for 3 min. 4.2.2.5 Terminations, end stops Lines shall be terminated in such a manner that they can be connected, directly or by an appropriate connector as specified by the manufacturer, to a body holding device, e.g. a rescue harness or a rescue loop, or to an anchor device.
Reinforcement or another method shall be used to protect terminations from concentrated wear at all webbing-to-metal fitting interfaces.
All splices shall be secured to prevent the splice from coming open in use.
Eye splices in laid fibre rope shall consist of at least four tucks using all the yarns in the strands. The length of the splicing tails emerging after the last tuck shall be at least one rope diameter. Threads used for sewing shall be physically compatible with the webbing/rope, and the quality shall be compatible to that of the webbing/rope. They shall, however, be of a contrasting shade or colour in order to facilitate visual inspection. When using a knot for forming a termination or as an end stop, the knot shall be secured so that it cannot be opened without the use of a tool. When tested in accordance with 5.6, the tail end of the knot shall have a minimum length of 100 mm. Webbing ends shall be sealed or otherwise prevented from unravelling. Eye terminations of wire ropes shall be made with thimbles and by splices or with thimbles and by pressed ferrules. 4.3 Dynamic strength When tested in accordance with 5.3, the descender device shall not release the test mass and no part of the descender device shall show any signs of breaking or tearing.
SIST EN 341:2011
EN 341:2011 (E) 8 4.4 Function 4.4.1 Classes A, B and C When tested in the dry and wet condition in accordance with 5.4.1 and 5.4.2:
a) it shall be possible to maintain a continuous descent velocity between 0,5 m/s and 2 m/s; b) in the case of a manually-operated descender device, the velocity shall not exceed 2 m/s when the control device is in a hands-off position or if applicable any panic locking element is engaged;
c) none of the parts of the descender device handled by the user to control the descents shall develop a temperature higher than 48 °C during the descents. When tested in wet and cold conditions in accordance with 5.4.3, it shall be possible to maintain a continuous descent velocity between 0,5 m/s and 2 m/s. If the manufacturer claims that the descender device can be used at temperatures lower than – 4 °C, it shall be possible to maintain a continuous descent velocity between 0,5 m/s and 2 m/s when tested in very cold conditions in accordance with 5.4.4. 4.4.2 Class D When tested in the dry condition in accordance with 5.4.1:
a) it shall be possible to maintain a continuous descent velocity at a maximum of 2 m/s; b) in the case of a manually-operated descender device, the velocity shall not exceed 2 m/s when the control device is in a hands-off position or if applicable any panic locking element is engaged;
c) none of the parts of the descender device handled by the user to control the descent shall develop a temperature higher than 48 °C during the descent. If the manufacturer claims that the descender device can be used in wet conditions, it shall be possible to maintain the descent velocity at a maximum of 2 m/s when tested in the wet conditions in accordance with 5.4.2. If the manufacturer claims that the descender device can be used in the temperature range of (- 4 to + 2) °C, it shall be possible to maintain the descent velocity at a maximum of 2 m/s when tested in the wet and cold conditions in accordance with 5.4.3. If the manufacturer claims that the descender device can be used at temperatures lower than – 4 °C, it shall be possible to maintain a continuous descent velocity at a maximum of 2 m/s when tested in the very cold conditions in accordance with 5.4.4. 4.5 Descent energy When tested in accordance with 5.5, with the descents being carried out in succession, descender devices, class A, B and C shall meet the following requirements: a) they shall resist the descent energy determined for their class; b) the temperature due to friction shall not affect the function of the descender device; c) it shall be possible to maintain the descent velocity between 0,5 m/s and 2 m/s; d) none of the parts of the descender device handled by the user to control the descents shall develop a temperature higher than 48 °C during the descents. SIST EN 341:2011
EN 341:2011 (E) 9 NOTE This test is not required for Class D descender devices, as they are intended for a single use only. 4.6 Static strength When tested in accordance with 5.6, first test, descender devices, class A, B and C shall withstand a test force of 10 times the maximum rated load, but at least 12 kN, applied for 3 min. When tested in accordance with 5.6, first test, descender devices, class D shall withstand a test force of twice the maximum impact force recorded in the dynamic test of 5.3, but at least 5 times the maximum rated load, applied for 3 min. If manually-operated devices are tested in several locked positions, the highest of the measured values shall be used as a basis for establishing the static strength test force. When tested in accordance with 5.6, second test, descender devices, classes A, B, C and D shall withstand a test force of 5 times the maximum rated load, but at least 6 KN, applied for 3 min. 4.7 Corrosion resistance After testing in accordance with 5.10, no part of the descender device shall show evidence of corrosion that would affect its function. NOTE 1 White scaling or tarnishing is acceptable if the function is not impaired. NOTE 2 Conformity with this requirement does not imply suitability for use in a marine environment. 4.8 Additional requirements for manually-operated descender devices (type 2) 4.8.1 Operating force When tested in accordance with 5.7, with a force equal to the maximum rated load, the force to release and operate the integral manually-operated control element of the descender device shall not exceed 450 N. 4.8.2 Holding force When descender devices of a design where the user controls the descent manually by holding the line are tested in accordance with 5.8, with a force equal to the maximum rated load, the maximum force necessary to hold the test mass shall not exceed 200 N.
4.9 Additional requirements for descender devices, class D After testing in accordance with 5.4, Class D descender devices shall indicate clearly that they have been used. 4.10 Marking and information Marking of the descender device shall be in accordance with Clause 6. Information shall be supplied with the descender device in accordance with Clause 7. 5 Test methods 5.1 Test samples A minimum of two new descender devices shall be provided: one for the purposes of the tests specified in 5.2 and 5.10 and one for the purposes of the tests specified in 5.3, 5.4, 5.5, 5.6, 5.7 and 5.8. SIST EN 341:2011
EN 341:2011 (E) 10 NOTE Depending on the configuration, the claim of the manufacturer for the intended use, the material of the line and the class of the device, more than two samples may be required. 5.2 Examination of design Confirm by reference to appropriate documentation accompanying the descender device and by measurement and by normal or corrected vision and/or tactile examination of the descender device that it conforms to 4.1, 4.2.1, 4.2.2, 4.2.2.1, 4.2.2.2, 4.2.2.3 and 4.2.2.5. If necessary to examine internal parts, dismantle the descender device. 5.3 Dynamic strength test The test apparatus shall conform to 4.4.1, 4.5, 4.6 and, if applicable, to 4.4.2 of EN 364:1992. Attach a new descender device by its connecting element or the line of the descender device, as appropriate, to the anchor point of the test apparatus, in accordance with the information supplied by the manufacturer, see Figures 1 or 2. Manually-operated descender devices shall be tested in each locked position intended by the manufacturer and described in the information supplied by the manufacturer. Withdraw the line by (4 000 + 500) mm from the descender device and attach the rigid steel test mass in accordance with the maximum rated load to the termination of the line or to the descender device, as appropriate. In the case of descender devices with an automatic retraction function, prevent the line from retracting by a clamp. For descender devices, class D, attach a load cell between the descender device and the anchor point of the test apparatus. Raise the test mass by (600 + 500) mm, with a maximum horizontal distance of 300 mm from the anchor point.
Hold the test mass by the quick release device. Release the test mass without initial velocity. For descender devices, class D, measure and record the impact force in each dynamic test. Check that the descender device does not release the test mass and does not show any signs of breaking or tearing. If the descender device is designed both to travel with the user and to be operated from a fixed position, carry out the test in both configurations. A new descender device may be used for each configuration. SIST EN 341:2011
EN 341:2011 (E) 11 Dimensions in millimetres
Key 1 anchor point 2 quick release device 3 line 4 descender device 5 test mass Figure 1 — Dynamic strength test for descender devices that normally travel with the user
SIST EN 341:2011
EN 341:2011 (E) 12 Dimensions in millimetres
Key 1 anchor point 2 quick release device 3 line 4 descender device 5 test mass Figure 2 — Dynamic strength test for descender devices that normally do not travel with the user 5.4 Function tests 5.4.1 Dry condition Using the descender device tested in 5.3, store the descender device at a temperature of (20 ± 2) °C and a humidity of (65 ± 5) % for at least 72 h. SIST EN 341:2011
EN 341:2011 (E) 13 Attach the descender device to the anchor point of the test apparatus in accordance with the information supplied by the manufacturer. If there is more than one position given, perform the function test in each position. Carry out the following descents at the maximum descent height and operate the descender device as described in the information supplied by the manufacturer: a) a first descent from top to bottom of the line with a test mass equivalent to the minimum rated load, with a tolerance of (20+) %; b) a second descent from top to bottom of the line with a test mass equivalent to the maximum rated load plus 25 %, with a tolerance of (20+) %. For descender devices, class D, a new descender device tested to 5.3 may be used for the second descent. During each descent, check that the descent is continuous, measure the time and calculate the mean velocity based on the descent height.
For manually-operated descender devices, check that the velocity does not exceed 2 m/s when the control device is in a hands-off position or if applicable any panic locking element is engaged.
Within 30 s of completing the descents with the maximum rated load plus 25 %, measure the temperature on any parts of the descender device that will be touched to control the descent when operated as described in the information supplied by the manufacturer. For descender devices, class D, check if the descender device indicates that it has been used. 5.4.2 Wet condition
Immerse the descender device tested in 5.4.1 in clean, fresh water within a temperature range of (10 to 30) °C for (6050+) min. Remove from the water and allow to drain for (15 ± 1) min. Within 2 min of completion of the draining process, attach the descender device to the anchor point of the test apparatus, in accordance with the information supplied by the manufacturer. If there is more than one position given, perform the function test in each position. Carry out the following descents at the maximum descent height: a) a first descent from top to bottom of the line with a test mass equivalent to the minimum rated load, with a tolerance of (20+) %; b) a second descent from top to bottom of the line with a test mass equivalent to the maximum rated load plus 25 %, with a tolerance of (20+) %. Operate the descender device in accordance with the information supplied by the manufacturer.
During each descent, check that the descent is continuous, measure the time and calculate the mean velocity based on the descent height. For manually-operated descender devices, check that the velocity does not exceed 2 m/s when the control device is in a hands-off position or if applicable any panic locking element is engaged. For descender devices, class D, a new descender device may be used for each descent. For descender devices, class D, check if the descender device indicates that it has been used. SIST EN 341:2011
EN 341:2011 (E) 14 5.4.3 Wet and cold condition Immerse a new descender device in clean, fresh water within a temperature range of (10 to 30) °C for (6050+) min. Remove from the water and allow to drain for (15 ± 1) min. Wrap the descender device in an insulating blanket (not specified) and subject them to a temperature of (-420−) °C for a minimum of 4 h. NOTE The insulating blanket is required to enable the descender device to be within the conditioned temperature range at the time the test is carried out.
Within 2 min of removal from the conditioned atmosphere, attach the descender device to the anchor point of the test apparatus, in accordance with the information supplied by the manufacturer. If there is more than one position given, perform the function test in each position after re-conditioning. Carry out the following descents using a descender device with a line of a minimum length of 5 m in a laboratory or at the maximum descent height. Operate the descender device
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