Additional Information - Petzl MAESTRO S Mode D'emploi

EN
These instructions explain how to correctly use your equipment. Only certain techniques and
uses are described.
The warning symbols inform you of some potential dangers related to the use of your
equipment, but it is impossible to describe them all. Check Petzl.com for updates and

additional information.

You are responsible for heeding each warning and using your equipment correctly. Any misuse
of this equipment will create additional dangers. Contact Petzl if you have any doubts or
difficulty understanding these instructions.
1. Field of application
Personal protective equipment (PPE) used for fall protection.
Descender with integrated progress-capture pulley.
This product must not be pushed beyond its limits, nor be used for any purpose other than
that for which it is designed.
Responsibility
WARNING
Activities involving the use of this equipment are inherently dangerous.
You are responsible for your own actions, decisions and safety.
Before using this equipment, you must:
- Read and understand all Instructions for Use.
- Get specific training in its proper use.
- Become acquainted with its capabilities and limitations.
- Understand and accept the risks involved.
Failure to heed any of these warnings may result in severe injury or death.
This product must only be used by competent and responsible persons, or those placed under
the direct and visual control of a competent and responsible person.
You are responsible for your actions, your decisions and your safety and you assume the
consequences of same. If you are not able, or not in a position to assume this responsibility, or
if you do not fully understand the Instructions for Use, do not use this equipment.
2. Nomenclature
(1) Moving side plate, (2) Axle, (3) Sheave, (4) Moving brake plate, (5) Fixed brake plate, (6)
External brake, (7) Handle, (8) Anchor attachment hole, (9) Auxiliary attachment hole, (10) Rivet.
Handle positions:
a. Stop position (load locked, handle stowed to prevent accidental snagging).
b. Descent (the handle gradually releases the lock).
Depending on the MAESTRO model and the rope diameter used, the handle travel can vary
before entering zone b.
Principal materials:
Aluminum alloy, stainless steel.
3. Inspection, points to verify
Your safety depends upon the integrity of your equipment.
Petzl recommends a detailed inspection by a competent person at least once every 12
months (depending on current regulations in your country, and your conditions of usage).
Warning: your intensity of use may cause you to inspect your PPE more frequently. Follow the
procedures described at Petzl.com. Record the results on your PPE inspection form: type,
model, manufacturer contact info, serial number or individual number, dates: manufacture,
purchase, first use, next periodic inspection; problems, comments, inspector's name and
signature.
Before each use
Verify the absence of any cracks, deformation, marks, wear, corrosion on the product (side
plates, sheave, moving brake plate, fixed brake plate, attachment holes, axles, brake). Check
the condition of the sheave and verify that it operates properly (rotates in one direction, locks
in the other direction). Check the condition of the sheave: you must hear 36 clicks during one
complete rotation. Check the condition of the handle and verify that it works properly (moving
brake plate drive, return spring). Check the mobility of the moving brake plate.
During use
It is important to regularly monitor the condition of the product and its connections to the other
equipment in the system. Make sure that all items of equipment are correctly positioned with
respect to each other.
Warning: locking effectiveness can vary depending on the condition of the rope (wear, dirt,
moisture, ice...).
Keep the rope between the MAESTRO and the load as taut as possible to reduce the risk of
a fall or pendulum.
Make sure that the tensioned rope is well-aligned with the device, in the same plane as the
sheave. Warning: when hauling, pulling the free end off-axis can disturb the alignment between
the rope and the device.
A risk analysis of your specific work situation may lead you to set up a backup belay system
(e.g. EN 12841 type A or second MAESTRO).
4. Compatibility
Verify that this product is compatible with the other elements of the system in your application
(compatible = good functional interaction).
Equipment used with your MAESTRO must meet current standards in your country (e.g. EN
1496 or EN 813 harnesses).
5. Function principle and test
MAESTRO allows the rope to travel in one direction, and locks in the other direction.
The rope locks by being pinched between the moving brake plate and the fixed brake plate.
The rope can travel in the direction of hauling, even when the moving brake plate is in the
locking position.
Locking can be gradually released by operating the handle (always hold the brake side of
the rope).
AUTO-LOCK system
The AUTO-LOCK system locks the load automatically and returns the handle to the stop
position.
6. Installing the MAESTRO
Open the moving side plate. Push the moving brake plate with the rope to place the rope
around the sheave, in the direction indicated by the icons marked on the device. Close the
moving side plate and connect the device to the anchor with a locking carabiner.
Each time the rope is installed, check that the rope locks in the desired direction.
The MAESTRO must be able to move freely so that it can align naturally with the loaded rope.
7. Specifications
Maximum working load:
MAESTRO S: 250 kg.
MAESTRO L: 280 kg.
Breaking strength: 36 kN.
Breaking strength on the auxiliary attachment hole:
MAESTRO S: 11 kN.
MAESTRO L: 22 kN.
Hauling efficiency:
MAESTRO S: F = 1.16 M.
MAESTRO L: F = 1.24 M.
Efficiency:
MAESTRO S: 86 %.
MAESTRO L: 81 %.
Efficiency is measured with a rope of the minimum diameter compatible with the device.
8. Uses
8a. Descent: to control the descent, always hold the brake side of the rope, gradually operate
the handle to allow the rope to travel.
If the handle is pulled too far, the moving brake plate will no longer brake the rope.
Warning: any excessive pulling on the handle can cause a loss of control.
Normal friction: every descent must begin with the rope running over the external brake.
Direct the rope so that it always stays in place inside the brake. Beware of twists or loops of
rope that could cause the rope to come out of the brake.
Minimum friction: during the descent, if there is too much friction, (swollen or dirty rope, light
load...), the rope can be removed from the external brake.
8b. Hauling, lowering in haul mode: see diagrams.
8c. Belaying, giving slack: manipulate the handle with a single finger; always hold the brake
side of the rope.
8d. Stop position: before letting go of the rope, make sure the handle is properly stowed.
Beware of any rubbing against the structure or equipment that could prevent the return of the
handle. If the handle is not in the stop position, it is exposed to accidental snagging that can
cause unlocking.
9. Limitations on use
These Instructions for Use specify essential parameters to follow when using the descender:
mass, length, speed, compatible ropes...
Other factors can come into play, such as the condition of the rope (new ropes are often
slippery), or the temperature of use (high heat reduces braking effectiveness).
The descender functions optimally under average use conditions. It reaches
its performance limits when all of these parameters approach the maximum.
Under these extreme use conditions, there is a risk of losing control of the
descent and/or damaging the rope.
You must be more alert and not hesitate to take special precautions (add friction, reduce
speed, split the descent into shorter sections using intermediate anchors...).
Limitations on use in the cold:
Exceptionally cold and wet conditions (rain, water spray, condensation...) can degrade the
performance of your rope/descender combination.
TECHNICAL NOTICE MAESTRO
10. Additional information
This product meets the requirements of Regulation (EU) 2016/425 on personal protective
equipment. The EU declaration of conformity is available at Petzl.com.
- The MAESTRO is not suitable for use in a fall arrest system.
- Any dynamic overload can damage the rope.
- You must have a rescue plan and the means to rapidly implement it in case of difficulties
encountered while using this equipment.
- The anchor point for the system should preferably be located above the user's position and
should meet the requirements of the EN 795 standard (12 kN minimum strength).
- In a fall arrest system, it is essential to check the required clearance below the user before
each use, in order to avoid hitting the ground or an obstacle in the event of a fall.
- Make sure that the anchor point is correctly positioned, in order to limit the risk and the
length of a fall.
- A fall arrest harness is the only device allowable for supporting the body in a fall arrest
system.
- When using multiple items of equipment, a dangerous situation can arise in which the safety
function of an item of equipment can be affected by the safety function of another item of
equipment.
- WARNING - DANGER: ensure that your products do not rub against abrasive or sharp
surfaces.
- Do not expose the rope to flames or high temperatures.
- Users must be medically fit for activities at height. WARNING: inert suspension in a harness
can result in serious injury or death.
- The Instructions for Use for each item of equipment used in conjunction with this product
must be followed.
- The Instructions for Use must be provided to the user of this equipment, in the language of
the country where the equipment is used.
- Make sure the markings on the product are legible.
EN 12841: 2006 type C
Ropes tested during the CE EN 12841 type C certification:
MAESTRO S
- Petzl PARALLEL 10.5 mm.
- Teufelberger KMIII 11.5 mm.
MAESTRO L
- Petzl VECTOR 12.5 mm.
- Teufelberger KMIII 13 mm.
EN 341: 2011 class A
- Maximum energy of descent 7.5 MJ.
Energy = user weight x gravity x length of descent x number of descents.
- Ropes tested, maximum working load, maximum descent: see diagrams.
- Minimum load: 30 kg.
- Protect the MAESTRO from surrounding environmental conditions if it is left installed on the
anchor between inspections.
- Install the MAESTRO on the anchor in a way that does not interfere with the descent.
- Control the speed of descent; a loss of control can be difficult to correct.
- The MAESTRO can overheat and damage the rope in a descent that is too long or too fast.
- In the context of the EN 341 standard, the MAESTRO is designed for rescue use only.
- Specifications of ropes tested:
Nylon and polyester ropes.
1. Sheath slippage (%)
2. Elongation (%)
3. Mass of the sheath (%)
4. Mass of the core material (%)
5. Mass per unit length (g/m)
6. Shrinkage (%)
When to retire your equipment:
WARNING: an exceptional event can lead you to retire a product after only one use, depending
on the type and intensity of usage and the environment of usage (harsh environments, marine
environments, sharp edges, extreme temperatures, chemicals...).
A product must be retired when:
- It has been subjected to a major fall or load.
- It fails to pass inspection. You have any doubt as to its reliability.
- You do not know its full usage history.
- When it becomes obsolete due to changes in legislation, standards, technique or
incompatibility with other equipment...
Destroy these products to prevent further use.
Icons:
A. Unlimited lifetime - B. Marking - C. Acceptable temperatures - D. Usage precautions -
E. Cleaning - F. Drying - G. Storage/transport - H. Maintenance - I. Modifications/repairs
(prohibited outside of Petzl facilities, except replacement parts) - J. Questions/contact
3-year guarantee
Against any material or manufacturing defect. Exclusions: normal wear and tear, oxidation,
modifications or alterations, incorrect storage, poor maintenance, negligence, uses for which
this product is not designed.
Warning symbols
1. Situation presenting an imminent risk of serious injury or death. 2. Exposure to a potential
risk of accident or injury. 3. Important information on the functioning or performance of your
product. 4. Equipment incompatibility.
Traceability and markings
a. Meets PPE regulatory requirements. Notified body performing the EU type examination - b.
Number of the notified body responsible for the production control of this PPE - c. Traceability:
datamatrix - d. Rope diameter and maximum working load - e. Serial number - f. Year of
manufacture - g. Month of manufacture - h. Batch number - i. Individual identifier - j. Standards
- k. Read the Instructions for Use carefully - l. Model identification - m. Locking direction - n.
Breaking load - o. Maximum descent and temperature of use - p. Handle positions - q. NFPA
certification body - r. Manufacturer address
D0003200E (240320)
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