MKS Oriel Instruments 3502 User manual

MKS Newport Family of Brands –ILX Lightwave®• Corion®• New Focus™ • Oriel®Instruments • Richardson Gratings™ • Spectra-Physics®
P/N: 90068136 REV: B, 8/12/2022
Optical Chopper System
User’s Manual
Oriel®Instruments
Model 3502, 3502-BASE

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Optical Chopper System
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Table of Contents
1Safety Precautions 6
1.1 Definitions and Symbols..................................................................................... 6
1.1.1 General Warning or Caution....................................................................... 6
1.1.2 Electrical Shock .......................................................................................... 6
1.1.3 European Union CE Mark .......................................................................... 7
1.1.4 On................................................................................................................ 7
1.1.5 Off............................................................................................................... 7
1.1.6 Waste Electrical and Electronic Equipment (WEEE)................................. 7
1.2 Warnings and Cautions....................................................................................... 8
1.2.1 General Warnings ....................................................................................... 8
1.2.2 General Cautions......................................................................................... 8
1.3 Location of Labels and Warnings..................................................................... 10
1.3.1 Model 3502 Optical Chopper Controller Rear Panel................................ 10
2General Information 11
2.1 System Overview.............................................................................................. 11
2.1.1 Key Product Features:............................................................................... 11
2.2 Scope of this Manual ........................................................................................ 11
2.3 Unpacking and Inspection ................................................................................ 12
2.3.1 What is included ....................................................................................... 12
2.4 Environmental Operation Requirement............................................................ 13
2.4.1 Operating Limits....................................................................................... 13
2.4.2 Weight and Dimensions............................................................................ 13
3Using the Chopper 14
3.1 How the Model 3502 Optical Chopper Works................................................. 14
3.2 Mounting the Unit............................................................................................. 15
3.2.1 Chopper Head ........................................................................................... 15
3.2.2 Chopper Motor.......................................................................................... 17
3.2.3 Mounting a Wheel..................................................................................... 17

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Optical Chopper System
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3.2.4 Mounting the Wheel Cover....................................................................... 19
3.3 Initial Setup....................................................................................................... 20
3.3.1 Power ........................................................................................................ 20
3.3.2 Connecting the Chopper Head to the Chopper Controller........................ 21
3.3.3 Connecting the Chopper Controller to a Computer via USB ................... 21
3.4 Operation .......................................................................................................... 21
3.4.1 Front Panel Operation............................................................................... 21
3.5 Back Panel Operation ....................................................................................... 28
4Computer Interfacing 30
4.1 Introduction....................................................................................................... 30
4.2 Using the Graphical User Interface (GUI)........................................................ 30
4.2.1 A Quick Start: How to Use the ‘New Focus Chopper Application’......... 31
4.3 USB Communication........................................................................................ 32
4.4 Command Index and Conventions.................................................................... 32
4.5 Command Description...................................................................................... 34
5Troubleshooting 41
5.1 Normal Startup Operation................................................................................. 41
5.2 Symptoms and Steps to Follow ........................................................................41
6Specifications 43
6.1 Chopping Frequency......................................................................................... 43
6.2 Internal Synthesizer .......................................................................................... 43
6.3 Reference Input................................................................................................. 43
6.4 Reference Output.............................................................................................. 44
6.5 Phase Shifter ..................................................................................................... 44
6.6 Harmonic Locking............................................................................................ 44
6.7 External Voltage Control.................................................................................. 44
6.8 General.............................................................................................................. 44
7Maintenance, Warranty, and Service 45
7.1 Enclosure Cleaning........................................................................................... 45
7.2 Warranty and Service........................................................................................ 45

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7.3 Request for Assistance / Service....................................................................... 46
7.4 Repair Service................................................................................................... 46
7.5 Non-Warranty Repair ....................................................................................... 47
7.6 Warranty Repair................................................................................................ 47
7.7 Loaner / Demo Material.................................................................................... 48

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Optical Chopper System
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Figures
Figure 1: Exclamation symbol........................................................................... 6
Figure 2: Electrical Shock symbol..................................................................... 6
Figure 3: CE mark.............................................................................................. 7
Figure 4: ON symbol. ........................................................................................ 7
Figure 5: OFF symbol........................................................................................ 7
Figure 6: WEEE Directive symbol.................................................................... 7
Figure 7: Warning, Certification, and Information Label................................ 10
Figure 8: Functional block diagram for Model 3502 Optical Chopper........... 14
Figure 9: Model 3502 Optical Chopper Head with wheel cover installed. ..... 16
Figure 10: Dimensions of Model 3502 Optical Chopper Head....................... 17
Figure 11: Chopper wheels.............................................................................. 18
Figure 12: Model 3502 Optical Chopper Controller front panel.................... 21
Figure 13: Model 3502 Optical Chopper Controller back panel. ................... 28
Figure 14: Model 3502 Optical Chopper Application window...................... 31

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Optical Chopper System
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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.

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Optical Chopper System
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1.1.3 European Union CE Mark
Figure 3: CE mark.
The presence of the CE Mark on Newport 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 accordingto local laws. The
separate collection and recycling of WEEE waste at the time of disposal will help
conserve natural resources and ensurethat it is recycled ordisposed of in a manner
that protects human health and the environment. For information about where the

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user can drop off WEEE waste for recycling, please contact your local Newport
representative.
1.2 Warnings and Cautions
1.2.1 General Warnings
Observe these general warnings when operating or servicing this equipment:
•Thoroughly read and understand this User’s Manual.
•Heed all warnings on the unit and in the operating instructions.
•Use this equipment indoors only.
•The external input power to this equipment can be up to 240 VAC. Please
follow this User’s Manual for proper use or installation of this instrument.
•Disconnect power before cleaning the equipment. Do not use liquid or
aerosol cleaners; use only a damp lint-free cloth.
•Lockout all electrical power sources before servicing the equipment.
•There are no user-replaceable fuses in this equipment. The user must
ensure that appropriate current-limiting protection is provided by the
external AC power line.
•Do not operate this equipment in an explosive or flammable atmosphere.
•Use only the supplied mains power cord with the external AC supply. Use
of under-rated power cords may cause property damage.
1.2.2 General Cautions
Observe these cautions when operating this equipment:
•Thoroughly read and understand this User’s Manual.
•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.

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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.

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1.3 Location of Labels and Warnings
1.3.1 Model 3502 Optical Chopper Controller Rear Panel
Figure 7: Warning, Certification, and Information Label.