Welch Allyn Solarc Light Source User Manual [en, de, es, fr, it]

®

MANUAL, REF LB24M INTERNATIONAL

English . . . . . . . . 1 Français . . . . . . 31 Español . . . . . . 61 Português . . . . 91 Deutsch . . . . . 121 Italiano . . . . . . 153. . . . . . .183. . . . . . . 211

CaviCide® is a registered trademark of Metrex Research Corporation [phone].

Lysol® is a registered trademark of Reckitt Benckiser [phone].

Solarc® is a registered trademark of Welch Allyn, Inc. [phone].

Table of Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Indications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Contraindications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

User Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Symbol Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Warnings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

System Description and Operation . . . . . . . . . . . . . . . .11

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Lamp Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Illumination System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Equipment Classification . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Patents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Emissions and Immunity Information . . . . . . . . . . . . . . . . . 22

Warranty and Service . . . . . . . . . . . . . . . . . . . . . . . . . 27

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

2	Welch Allyn Light Source

3

1 Introduction

This manual describes the setup, installation, start-up, and use of the Welch Allyn Light Source.

Indications

Use of the Welch Allyn Light Source is indicated for medical lighting applications requiring a remotely located, high-quality white light. This product must only be used by qualified medical personnel.

Contraindications

The use of the Welch Allyn Light Source is contraindicated for applications where high intensity light might burn or damage tissues; such as for neonate transillumination and ophthalmic procedures.

For further contraindications, the user must also consult the operating manual of the instrument being used with the Light Source in the medical procedure.

User Profile

This product must only be used by qualified medical personnel.

4 Chapter 1 Introduction

Symbol Description

	Caution: Consult accompanying
	documentation
	Light; Lighting; Illumination
	Intensity
IPXØ	Not Protected Against the
	Ingress of Water
	Type BF Equipment

Filter In / Filter Out

Lamp On

Storage Humidity

MAX

		ER	TE
	T
	IN			K
				CM
C	LI	S TE		D	US

3045357

ITS, Nationally Recognized

Testing Laboratory (NRTL) Mark

c

Direct Current

Welch Allyn Light Source

Not AP/APG Equipment

Caution, Hot Surface

Bright Light

Alternating Current

Indoor/dry location use only

Lamp Off

Transport Temperature

UL Recognized Component Mark

US

Double Insulation

Directions for Use

Chapter 1 Introduction

5

European CE Mark	EMC Framework of Australia
	N344
Caution	Hazard Warning

Recycling SymbolDo not dispose of this product as unsorted municipal waste. Prepare this product for reuse or separate collection as specified by Directive 2002/96/EC of the European Parliament and the Council of the European Union on Waste Electronic and Electrical Equipment (WEEE). If this product is contaminated, this directive does not apply. See www.welchallyn.com/weee or contact Welch Allyn Customer Service.

6

Chapter 1 Introduction

Welch Allyn Light Source

Warnings

A warning statement in this manual identifies a condition or practice which, if not corrected or discontinued immediately, could lead to patient injury, illness or death.

WARNING RISK OF FIRE. Do not operate on, near, or over combustible material. Operate only on smooth, hard, flat surface. This device is not suitable for use in

the presence of a flammable anesthetic mixture with air or oxygen or nitrous oxide. An explosion may result.

WARNING The high intensity light at the front of the light source and at the tip of the fiber optic bundle will create high temperatures and bright light. To minimize the risk of injury, avoid direct viewing or contact with sensitive tissues.

WARNING Do not use for neonate transillumination.

Erythema may result.

WARNING To prevent temporary blinding, always plug the fiber optic bundle into the Welch Allyn Light Source and set the light intensity control to minimum before turning the power ON.

WARNING If this light source is used during invasive surgery, the failure of a component within the system, causing loss of illumination, may indirectly cause risk to the patient. Therefore, it is recommended to have alternative means of illumination available.

WARNING When the unit is on, never disconnect the fiber optic bundle from the light source or the accessory from the end of the fiber bundle. High intensity light from the end of the fiber optic bundle can ignite combustible material.

Directions for Use

Chapter 1 Introduction

7

WARNING PROVIDE ADEQUATE VENTILATION TO PREVENT OVERHEATING. Do not cover or drape this light source. Provide a 3 inch (7.62 cm) distance between the Welch Allyn Light Source and any solid objects.

WARNING Use only non-electrically conductive fiber bundles. Use of conductive fiber bundles will

compromise the safety and effectiveness of this device.

WARNING RISK OF SHOCK. Do not operate the Light Source without a lamp installed. Disconnect power before attempting to change the lamp.

WARNING This product comes with a power cord that is intended for use only with this product. The power cord has not been tested and approved for use with other products that may have the same power connectors. If you cannot locate the original power cord, please contact Welch Allyn to obtain replacement parts.

8

Chapter 1 Introduction

Welch Allyn Light Source

Cautions

A caution statement in this manual identifies a condition or practice which, if not corrected or discontinued immediately, could lead to equipment failure, equipment damage, or data loss.

Caution United States federal law restricts this device to sale by or on the order of a health care practitioner.

Caution Allow the lamp to cool before replacing.

Caution Since the Solarc Light Source uses a custom lamp, always have a spare lamp available for replacement. USE CAUTION BECAUSE LAMP MAY BE HOT. Allow lamp to cool before replacing.

Caution Do not sterilize the Welch Allyn Light Source. Refer to Cleaning section for cleaning instructions.

Caution Do not switch the Welch Allyn Light Source ON and OFF in rapid succession. Doing so will dramatically shorten lamp life. Allow lamp to cool down 10 to 15 seconds between uses.

Caution Do not use or store liquids above or on the

Welch Allyn Light Source.

Caution Do not operate device without the cover in place. Operate in the horizontal orientation only.

Caution Only qualified medical personnel should operate the Light Source.

Caution System integrator is responsible for all safety testing, including optical and thermal testing.

Directions for Use

Chapter 1 Introduction

9

Caution It is recommended to test dental composites with and without the optional filter prior to use with a patient.

Caution Any changes or modifications made to this device that are not expressly approved by Welch Allyn, Inc. will void the warranty and may compromise product safety.

10

Chapter 1 Introduction

Welch Allyn Light Source

11

	2	System Description and
		Operation

The Welch Allyn Solarc Light Source is used to supply high quality, white light for video and optical illumination systems.

1.Verify the power switch is in the OFF position ( ). Place the light source on a smooth, hard, level surface with at least 3” air clearance between the light source and any solid objects. Plug the power supply outlet connector to the light source power input (see Figure 1) and then plug the power supply into an appropriately rated power outlet (refer to Section 4, Electrical Specifications).

2.Turn the light intensity control knob to the minimum position (see Figure 1). Plug the fiber optic bundle into the light port and connect the distal end to the instrument.

Note For proper lamp performance, verify the fiber optic bundle is plugged in at all times.

3.Turn the power switch to the ON position ().The lamp will take 10 - 15 seconds to complete the warm-up cycle.

4.Set the light intensity knob to the desired level (see Figure 1).

5.Turn the unit OFF when not in use.

12

Chapter 2 System Description and Operation

Welch Allyn Light Source

.

Caution Do not restart the Solarc Light Source immediately after shutting it off - it may fail to light. If this occurs, turn the power off and wait 10 to 15 seconds before turning the unit back on.

In dental applications, the optional filter blocks light wavelengths that cure some dental composites. For white light, switch the filter out of the light path. When working with dental composites, switch the filter into the light path (Figure 1).

Note It is recommended to test dental composites with and without the optional filter prior to use with a patient.

Figure 1. Front and Rear View

Filter In

(Optional)

Maximum

Filter Out

Light (Optional)

Control

Minimum

Power Switch

Power Input

Fan

13

3	Maintenance

This section provides information to replace a lamp and to clean the Light Source. There are no other serviceable parts within the Light Source.

Lamp Replacement

WARNING RISK OF SHOCK. Do not operate the Light Source without a lamp installed. Disconnect power before attempting to change lamp.

Caution LAMP MAY BE HOT. Allow lamp to cool before handling.

Recommended lamp cooling time is a minimum of 10 minutes.

Caution Do not operate device without the cover in place. Operate in the horizontal position only.

To replace the lamp:

1.Turn the Solarc Light Source off and unplug the power cord from both the wall outlet and the rear of the unit.

14

Chapter 3 Maintenance

Welch Allyn Light Source

2.Remove the five screws from the Solarc Light Source using a #2 philips head screwdriver. Pivot the cover to expose the lamp.

Figure 2. Moving the Top Cover

Pivot

Removable Screws (two on opposite side)

3.Flip up the retaining latch. Pull the lamp base back and up against the retaining spring to remove the lamp.

4.Remove the lamp, with harness attached and then disconnect the lamp connector.

Figure 3. Inside the Light Source

Retaining Latch

Retaining Spring

Lamp Base

Lamp Connector

32

5.Replace with Welch Allyn replacement lamp 09500-U only. DO NOT touch the lamp or the interior reflective surface of the lamp. Skin oils on the lamp will cause premature lamp failure. Only hold the outside of the reflector or the base of

the lamp. Remove any grease or fingerprints with a clean

Directions for Use

Chapter 3 Maintenance

15

Q-tip moistened with alcohol. Do not leave any lint on the lamp.

6.Connect the new lamp to the connector and insert lamp to properly seat the alignment pin located on the bottom of the lamp into the slot located on the lamp bracket.

Figure 4. Bottom View of the Lamp Slot

Lamp Slot.

7.Close the retaining latch and replace the cover. Secure the five screws on the Solarc Light Source. Reconnect the power supply.

Do not operate the device without the cover in place. Dispose of the lamp according to local, state, and federal laws.

Cleaning

Caution Do not submerge the Solarc Light Source in water, cold steriliants, or in an ultrasonic cleaner.

Caution Do not use an autoclave, chemiclave, glutaraldehyde, iodophor or any other sterilization method, or damage may result.

Clean the Solarc Light Source monthly, or as required, as follows:

1.Prior to cleaning, turn power off and disconnect the power cord from both the wall outlet and the Solarc Light Source.

16

Chapter 3 Maintenance

Welch Allyn Light Source

2.Clean the external surfaces with a cloth dampened with mild soap and water or use the following cleaning/disinfecting solutions. Always follow the manufacturer’s recommendations.

•A quaternary ammonium disinfectant such as Cavicide®

•A phenol, alcohol-based spray such as Lysol® brand disinfectant

•Gluteraldehyde

•70% isopropyl alcohol

•10% mild bleach solution

•Metracide

•10% Wescodyne

•Banicide

•Wavecide-01

If there are any questions, please contact Customer Service.

3.The power cord may be wiped clean using the same cleaning/ disinfecting solutions listed above. Wipe dry with a clean cloth. Care must be taken not to get the plug prongs wet. DO NOT IMMERSE.

4.Do not plug the unit into a wall outlet until it is thoroughly dry.

Directions for Use Chapter 3 Maintenance 17

Ordering Information

LB24MS00-004-00	Welch Allyn Light Source with ACMI Adapter
	and North American Power Supply
LB24MS00-004-01	Welch Allyn Light Source with ACMI Adapter
	and European Power Supply
Power Supply:
North America:	LBM-PS-00
International:	LBM-PS-01
Replacement Lamp:	09500-U
Power Cords:
Europe:	704904
Australia:	704905
UK:	704906

18

Chapter 3 Maintenance

Welch Allyn Light Source

Troubleshooting

If lamp is not illuminating and...

Fan Is Not

Operating,

Light Source is not plugged into	Plug the power cord into the wall
either the wall outlet or the	outlet and power cord socket at back
power cord socket.	of unit.
Power switch is not turned on.	Depress the “	“side of the power
	switch.
Power cord is damaged.	Replace the power supply with a new
This may cause intermittent	Welch Allyn power supply.
operation.
No power is supplied to the wall	Verify that the wall outlet has power
outlet.	by checking the circuit breaker status
	and by operating other equipment at
	that wall outlet.

Fan Is	The lamp was not able to “cool	Wait at least 15 seconds after turning
Operating,	down” before restarting.	the Light Source off before turning it
		back on.
	The lamp has burned out.	Replace with a new Welch Allyn
		lamp. Refer to the lamp replacement
		section.

Low Light	Lamp is not properly seated in
Output	recess.

Remove the lamp and re-install per the lamp replacement instructions. Verify that the lamp is properly seated.

Light intensity control knob	Verify that the light intensity control
closed.	knob is fully open.

19

4	Specifications

Electrical

Caution Use Welch Allyn power supplies:

•LBM-PS-00

•LBM-PS-01

Power Supply Input: Voltage: 100–240 V~, 50–60 Hz

Power Supply Output: 12V, 3.4A

Current: 1A (@ 100 V~)

Light Box Input: 12V

Dimensions

5.8" (14.73 cm) (L) x 3.5" (8.89 cm) (W) x 2.8" (7.11 cm) (H)

Illumination System

Welch Allyn Solarc Lamp

Lamp: 60 Volts, 24 watts

20	Chapter 4 Specifications	Welch Allyn Light Source
Environment
	Operating:	Transport/Storage:

Temperature: 50° F (10° C) to 86° F (30° C) Humidity: 15 to 95% RH non-condensing

Temperature: -4° F (-20° C) to 120° F (49° C) Humidity: 15 to 95% RH non-condensing Atmospheric pressure: 700 hpa to 1060 hpa

Equipment Classification

Mode of Operation: Continuous Operation

System Classification: Safety Class II

Type BF Equipment

Ingress of Water: IPXØ

Not AP/APG Equipment

Patents

This product is covered by the following patents:

5,144,201; 5,083,059; 5,138,228; 5,117,154; 5,420,477; 5,539,273

Directions for Use

Chapter 4 Specifications

21

Approvals

		ERT	E
	T
	I			K
	N
				CM
C	I			D
	L	S TE			US

3045357

EN/IEC 60601-1

UL60601-1

CAN/CSA C22.2 No. 601.1-M90

IEC60601-1-2

EMC Framework of Australia

The CE mark on this product indicates it has been tested to and conforms with the provisions noted within the 93/42/EEC Medical Device Directive.

European Regulatory Manager

Welch Allyn Ltd.,

Navan Business Park

Dublin Road

Navan, County Meath, Republic of Ireland.

Tel.: [phone]

Fax: [phone]

22

Chapter 4 Specifications

Welch Allyn Light Source

Emissions and Immunity Information

Electromagnetic Emissions

The Welch Allyn Light Source is intended for use in the electromagnetic environment specified below. The customer or user of the Welch Allyn Light Source should assure that it is used in such an environment.

	Emissions test	Compliance	Electromagnetic environment - guidance
	RF emissions	Group 1	The Welch Allyn Light Source uses RF energy only for its
	CISPR 11		internal function. Therefore, its RF emissions are very low
			and are not likely to cause any interference in nearby
			electronic equipment.
	RF emissions	Class B	The Welch Allyn Light Source is suitable for use in all
	CISPR 11		establishments including domestic and those directly
			connected to the public low-voltage power supply network
	Harmonic emissions	Class A
			that supplies buildings used for domestic purposes.
	IEC 61000-3-2
	Voltage fluctuations/	Complies
	flicker emissions
	IEC 61000-3-3

Electromagnetic Immunity

The Welch Allyn Light Source is intended for use in the electromagnetic environment specified below. The customer or user of the Welch Allyn Light Source should assure that it is used in such an environment.

Immunity test	IEC 60601	Compliance	Electromagnetic environment -
	test level	level	guidance
Electrostatic	± 6 kV contact	± 6 kV contact	Floors should be wood, concrete, or
discharge (ESD)	± 8 kV air	± 8 kV air	ceramic tile. If floors are covered with
IEC 61000-4-2			synthetic material, the relative
			humidity should be at least 30%.
Electrical fast	±2 kV mains	±2 kV mains	Mains power quality should be that of
transient (EFT)/	±1 kV I/O	Not applicable	a typical commercial or hospital
burst			environment.
IEC 61000-4-4

Directions for Use			Chapter 4 Specifications	23
Surge	±1 kV differential	±1 kV differential	Mains power quality should be that of
IEC 61000-4-5	±2 kV common	±2 kV common	a typical commercial or hospital
			environment.
Voltage dips, short	>95% dip in	>95% dip in	Mains power quality should be that of
interruptions, and	0.5 cycle	0.5 cycle	a typical commercial or hospital
voltage variations			environment. If the user of the Welch
on power supply	60% dip in	60% dip in	Allyn Light Source requires continued
input lines.	5 cycles	5 cycles	operation during power mains
IEC 61000-4-11			interruptions, it is recommended that
	30% dip for	30% dip for	the Welch Allyn Light Source be
	25 cycles	25 cycles	powered from an uninterruptible
	>95% dip in	>95% dip in	power supply or battery.
	5 seconds	5 seconds
Power frequency	3 A/m	3 A/m	Power frequency magnetic fields
(50/60Hz)			should be at levels characteristic of a
magnetic field			typical location in a typical
IEC 61000-4-8			commercial or hospital environment.

Electromagnetic Immunity

The Welch Allyn Light Source is intended for use in the electromagnetic environment specified below. The customer or user of the Welch Allyn Light Source should assure that it is used in such an environment.

Immunity	IEC 60601	Compliance Electromagnetic environment - guidance
test	test level	level
		Portable and mobile RF communications equipment
		should be used no closer to any part of the Welch Allyn
		Light Source, including cables, than the recommended
		separation distance calculated from the equation
		applicable to the frequency of the transmitter.

Recommended separation distance

Conducted	3 Vrms	3 Vrms	d = (1.17) P
RF, IEC	150 kHz to
61000-4-6	80 MHz

24	Chapter 4		Specifications					Welch Allyn Light Source
Radiated		3 V/m			3 V/m		d = (1.17)	P 80 MHz to 800 MHz
RF, IEC		80 MHz to						P 800 MHz to 2.5 GHz
61000-4-3		2.5 GHz					d = (2.33)
							where P is the maximum output power rating of the
							transmitter in watts according to the transmitter
							manufacturer and d is the recommended separation
							distance in meters.
							Field strengths from fixed RF transmitters, as
							determined by an electromagnetic site survey,a should
							be less than the compliance level in each frequency
							range.b
							Interference may occur in the vicinity of equipment
							marked with the following symbol:

Note 1: At 80 MHz and 800 MHz, the higher frequency range applies.

Note 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from structures, objects, and people.

aField strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast cannot be predicted theoretically with accuracy. To assess the electromagnetic environment due to fixed RF transmitters, an electromagnetic site survey should be considered. If the measured field strength in the location in which the Welch Allyn Light Source is used exceeds the applicable RF compliance level above, the Welch Allyn Light Source should be observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as reorienting or relocating the Welch Allyn Light Source.

bOver the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.

Directions for Use

Chapter 4 Specifications

25

Recommended Separation Distances Between Portable and Mobile RF Communications

Equipment and the Welch Allyn Light Source

The Welch Allyn Light Source is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or user of the Welch Allyn Light Source can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and the Welch Allyn Light Source as recommended below, according to the maximum output power of the communications equipment.

	Rated max.	Separation distance according to frequency of transmitter (m)
	output power
	of transmitter	150 kHz to 80 MHz	80 MHz to 800 MHz	800 MHz to 2.5 GHz
		d = (1.17) P	d = (1.17) P	d = (2.33) P
	(W)
	0.01	0.117	0.117	0.233
	0.1	0.37	0.37	0.74
	1	1.17	1.17	2.33
	10	3.70	3.70	7.37
	100	11.70	11.70	23.30

For transmitters rated at a maximum output power not listed above, the recommended separation distance d in meters (m) can be estimated using the equation applicable to the frequency of the transmitter, where P is the maximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer.

Note 1: At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.

Note 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from structures, objects, and people.

26

Chapter 4 Specifications

Welch Allyn Light Source

27

5	Warranty and Service

Warranty

Welch Allyn warrants the Welch Allyn Light Source when new, to be free of defects in material and workmanship and to perform in accordance with manufacturer’s specifications when subject to normal use and service for a period of one year from the date of purchase from Welch Allyn or an authorized agent. Welch Allyn will either repair or replace any components found to be defective or at variance from manufacturer’s specifications within this time at no cost to the customer. It shall be the purchaser’s responsibility to return the instrument directly to the authorized distributor, agent, or service representative.

This warranty does not cover the Solarc Lamp or breakage or failure due to tampering, misuse, neglect, accidents, improper installation, modification, shipping, or to improper maintenance, service, and cleaning procedures. This warranty is also void if the instrument is not used in accordance with manufacturer’s recommendations or if required or serviced by other than Welch Allyn or an authorized agent. Purchase date determines warranty requirements. No other express or implied warranty

is given.

28

Chapter 5 Warranty and Service

Welch Allyn Light Source

Service

If you have an equipment problem that you cannot resolve, you may call the Welch Allyn Service Center nearest you for assistance. Technical service support is available by telephone on normal business days at the phone numbers listed below.

If you are advised to return a product to Welch Allyn for repair or routine maintenance, schedule the repair with the service center nearest you.

Before returning a product for repair you must obtain authorization from Welch Allyn. An RMA (Return MerChandise Authorization) number will be given to you by our service personnel. Be sure to note this number on the outside of your shipping box. Returns without an RMA number will not be accepted.

USA Customers	Canada Customers
Welch Allyn, Inc., U.S.A.	Welch Allyn, Ltd., Canada
Tel: [phone]	Tel: [phone]
Fax: [phone]	Fax: [phone]

Welch Allyn, GmbH & Co KG	Welch Allyn, Ltd., Singapore
Tel: [phone]	Tel: [phone]
Fax: [phone]	Fax: [phone]
Welch Allyn France SARL	Welch Allyn, China
Tel: [phone]	Tel: [phone]
Fax: [phone]	Fax: [phone]
Welch Allyn, Ltd., Australia	Welch Allyn, Japan
Tel: [phone]	Tel: [phone]
Fax: [phone]	Fax: [phone]
Welch Allyn UK Ltd	Latin American Customers
Tel: [phone]	MD International
Fax: [phone]	Tel: [phone]
	Fax: [phone]