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User’s Manual

Model 3502

Optical Chopper

Warranty

New Focus warrants that this product will be free from defects in material and workmanship and will comply with New Focus’s published specifications at the time of sale for a period of one year from the date of shipment. If found to be defective during the warranty period, we will either repair or replace the product at our discretion.

To exercise this warranty, write or call your local New Focus office or representative, or contact Newport headquarters in Irvine, California. You will be promptly assisted and given return instructions. Send the product, freight prepaid, to the indicated service facility. We will make repairs and return the instrument, freight prepaid. Repaired products are warranted for the remainder of the original warranty period or 90 days, whichever first occurs.

Limitation of Warranty

The above warranties do not apply to products which have been repaired or modified without New Focus’s written approval, or products subjected to unusual physical, thermal or electrical stress; improper installation; misuse; abuse; accident or negligence in use, storage, transportation or handling. This warranty also does not apply to fuses, batteries, or damage from battery leakage.

This warranty is in lieu of all other warranties, expressed or implied, including any implied warranty of merchantability or fitness for a particular use. New Focus shall not be liable for any indirect, special, or consequential damages resulting from the purchase or use of its products.

First printing 2014

© 2014 by New Focus, Santa Clara, CA. All rights reserved. No part of this manual may be reproduced or copied without the prior written approval of New Focus.

This manual has been provided for information only and product specifications are subject to change without notice. Any changes will be reflected in future printings.

New Focus 3635 Peterson Way Santa Clara, CA, 95054 USA Part No. 90068136 Rev A

Confidentiality & Proprietary Rights

Reservation of Title The New Focus Programs and all materials furnished or produced in connection with them ("Related Materials") contain trade secrets of New Focus and are for use only in the manner expressly permitted. New Focus claims and reserves all rights and benefits afforded under law in the Programs provided by New Focus.

New Focus shall retain full ownership of Intellectual Property Rights in and to all development, process, align or assembly technologies developed and other derivative work that may be developed by New Focus. Customer shall not challenge, or cause any third party to challenge the rights of New Focus.

Preservation of Secrecy and Confidentiality and Restrictions to Access Customer shall protect the New Focus Programs and Related Materials as trade secrets of New Focus, and shall devote its best efforts to ensure that all its personnel protect the New Focus Programs as trade secrets of New Focus. Customer shall not at any time disclose New Focus's trade secrets to any other person, firm, organization, or employee that does not need (consistent with Customer's right of use hereunder) to obtain access to the New Focus Programs and Related Materials. These restrictions shall not apply to information (1) generally known to the public or obtainable from public sources; (2) readily apparent from the keyboard operations, visual display, or output reports of the Programs; (3) previously in the possession of Customer or subsequently developed or acquired without reliance on the New Focus Programs; or (4) approved by New Focus for release without restriction.

Trademarks The New Focus logo and name are registered trademarks of Newport Corporation in Mexico, Israel, Singapore, the European Union, Taiwan, Hong Kong, China, Japan, Korea, Canada, Australia, and the United States.

1 Safety Precautions

1.1 Definitions and Symbols

The following terms and symbols are used in this manual.

1.1.1 General Warning or Caution

Figure 1: Exclamation symbol. The Exclamation symbol in the figure above appears in Warning and Caution tables throughout this manual. This symbol indicates that you should read the associated documentation to determine the nature of any potential hazards and any actions that should be taken against these hazards.

1.1.2 Electrical Shock

Figure 2: Electrical Shock symbol. The Electrical Shock symbol in the figure above appears throughout this manual. It indicates a hazard arising from dangerous voltage. Any mishandling could result in irreparable damage to the equipment, and personal injury or death.

1.1.3 European Union CE Mark

Figure 3: CE mark. The presence of the CE Mark on New Focus equipment means that this instrument has been designed, tested and certified compliant to all applicable European Union (CE) regulations and recommendations.

1.1.4 On

Figure 4: ON symbol. The symbol in the figure above represents a power switch position on the Model 3502 Optical Chopper Controller. This symbol represents a Power On condition.

1.1.5 Off

Figure 5: OFF symbol.

The symbol in the figure above represents a power switch position on the Model 3502 Optical Chopper Controller. This symbol represents a Power Off condition.

1.1.6 Waste Electrical and Electronic Equipment (WEEE)

Figure 6: WEEE Directive symbol. This symbol on the product or its packaging indicates that the product must not be disposed with regular waste. It is the user’s responsibility to dispose of waste equipment marked with the WEEE Directive Symbol according to local laws. The separate collection and recycling of WEEE waste at the time of disposal will help conserve natural resources and ensure that it is recycled or disposed of

 If this equipment is used in a manner not specified in this manual, the protection provided by this equipment may be impaired.

 Do not block ventilation openings.

 Use only the specified replacement parts.

 Follow precautions for static sensitive devices when handling this equipment.

 This product should only be powered as described in the manual.

 There are no user-serviceable parts inside the Model 3502 Optical Chopper Controller or motor head.

WARNING

If this equipment is used in a manner not specified in this manual, the protection provided by this equipment may be impaired.

WARNING

This instrument is intended for use by qualified personnel who recognize thermal, shock, or laser hazards and are familiar with safety precautions required to avoid possible injury. Read this User’s Manual thoroughly before attempting to use the Model 3502 Optical Chopper!

CAUTION

The Model 3502 Optical Chopper is designed to be safe when operated under Normal Environmental Conditions as defined in EN61010-1:2010. Operation under harsher environmental conditions can result in severe injury.

The Model 3502 Optical Chopper is intended for use in an industrial laboratory environment. Use of this product in other environments, such as residential, may result in electromagnetic compatibility difficulties due to conducted as well as radiated disturbances.

1.3 Location of Labels and Warnings

1.3.1 Model 3502 Optical Chopper Controller Rear Panel

Figure 8: Warning, Certification, and Information Label.

2.3 Unpacking and Inspection

WARNING

Do not attempt to operate this equipment if there is evidence of shipping damage or you suspect the unit is damaged. Damaged equipment may present additional hazards to you. Contact New Focus technical support for advice before attempting to plug in and operate damaged equipment.

The Model 3502 Optical Chopper is carefully assembled, tested, and inspected before shipment. Upon receiving this instrument, check for any obvious signs of physical damage that might have occurred during shipment. Report any such damage to the shipping agent immediately. NOTE: Retain original packing materials in case reshipment becomes necessary.

2.3.1 What is included

The 3502 package contents:  Model 3502 Optical Chopper Controller.  Model 3502 Motor Assembly (including wheel cover) with a shielded Ethernet cable and a set of 2-slot, 7/5-slot, 42/30-slot, 60-slot, 60/2-slot, and 100-slot wheels, and lab post mounting hardware.  USB Flash Drive which contains this User Manual, USB driver, GUI software application and documented programming examples.  Power supply cables (North American and European).

2.4 Environmental Operation Requirement

2.4.1 Operating Limits

Parameter Minimum Maximum

Voltage Requirements 100V/50-60Hz 240V/50-60Hz

Electrical Ratings

25 Watts 100 - 240 VAC 50 - 60 Hz

Operating temperature 10 °C condensing)^ (≤ 90% humidity, non-^40 non^ °C-condensing)^ (≤ 90 % humidity,

Storage temperature 0 °C condensing)^ (≤ 85% humidity, non-^ 50 °C non-condensing)^ (≤ 85 % humidity,

Relative Humidity (storage) ≤ 85%

Altitude < 3000 meters (10000 feet)

Environment, Use Indoor Use Only

Pollution Degree 2

*Operating outside the operating limits may damage the unit.

2.4.2 Weight and Dimensions

Net Weight 5.7 lb. (Chopper^ Head assembly included) Controller Dimensions

4.0 in x 8.5 in x 11.0 in (H x W x L)

3.2 Mounting the Unit

3.2.1 Chopper Head

The Model 3502 Optical Chopper Head (Figure 10 and Figure 11) may be secured to standard optical benches using ¼”-20 or M6 bolts. The bolts pass through the mounting plate perpendicular to the plane of the optical bench. This mounting method provides the advantage of allowing the wheel to be rotated by loosening the ¼”-20 set screws on the side of the motor mount. Do not over- tighten the set screws. The Model 3502 Optical Chopper head may also be mounted on standard ½” optical bench rods. First, loosen the two ¼”-20 set screws. (These secure the head to the mounting plate by compressing on the dowel.) Remove the dowel and mounting plate assembly. Insert the ¼”-20 knob (supplied with the Chopper) into the base of the head. This knob is inserted into the same hole occupied by the dowel. Slide the motor mount onto the ½” optical bench rod and hand- tighten the knob. Do not over-tighten.

Figure 9 : Functional block diagram for Model 3502 Optical Chopper.

Figure 10: Model 3502 Optical Chopper Head with wheel cover installed.