•Helium-neon, continuous wave, two-frequency laser •Fast warm-up (typically four minutes) •Internal measurement receiver •Weight: 5.5 Kilograms (12 pounds) •Magnetic Field Strength (Non-Operating): Does not exceed 5.25 milligauss at a distance of 460 cm (15 ft) from any point on the surface of the packaged Laser Head. •Clearance Required for Cabling: 10.16 cm (4 in) beyond back •Power Input Requirements: +15 Volts +/- -0.3 Volts at 25 Amperes maximum, -15 Volts +/-0.l3 Volts at 0.02 Ampere maximum •Heat Dissipation: 23 watts during operation, 35 watts during warmup •Maximum Beam Power Output: 1 milliwatt •Minimum Beam Power Output: 180 microwatts •Beam Diameter: 6 millimeters (0.25 inch) typical •Vacuum Wavelength Accuracy (3 sigma, lifetime): 0.1 ppm •Vacuum Wavelength Stability: Typical 1 hour: 0.002 ppm •Typical lifetime: 0.02 ppm •Nominal Vacuum Wavelength: 632.99137 nanometers •Reference Frequency: 1.7 to 2.4 MHz for Keysight 5518As with serial number 2532A02139 and above, 1.5 to 2l.0 MHz for previous Keysight 5518As •Industry-leading reliability
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