Model 621 User’s Manual INTRODUCTION
Bristol Instruments, Inc. 4
1 INTRODUCTION
Welcome
Thank you for purchasing the 621 Laser Wavelength Meter from Bristol Instruments. Two
different models of this system are available: the 621A and 621B. The model 621A measures
absolute laser wavelength to an accuracy of ± 0.2 parts per million. The 621B system has an
accuracy of ± 0.75 parts per million.
The model 621A and model 621B are available for operation over the wavelength ranges of 375 –
1100 nm (VIS version), 520 – 1700 nm (NIR version), and 1 – 5 m (IR version). The 621B
system is also available for operation over the wavelength range of 2 to 12 m (MIR version) with
an accuracy of ± 1.0 part per million.
This User’s Manual includes information about the 621A and 621B Laser Wavelength Meters. It
covers all the topics necessary to help you operate your system.
If you have any questions about the operation of your 621 system, please do not hesitate to call
Bristol Instruments at (585) 924-2620. Or, you can contact us at service@bristol-inst.com.
Bristol Instruments, Inc.
50 Victor Heights Parkway
Victor, NY 14564
Tel: (585) 924-2620
Fax: (585) 924-2623
service@bristol-inst.com
www.bristol-inst.com
Safety Notices
Warning denotes a hazard. It calls attention to a procedure that, if not correctly performed or
adhered to, could result in injury or loss of life. Do not proceed beyond a warning sign until the
indicated conditions are fully understood and met.
Caution denotes a hazard. It calls attention to a procedure that, if not correctly performed or
adhered to, could result in damage to or destruction of the product. Do not proceed beyond a
caution sign until the indicated conditions are fully understood and met.
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