Welch Allyn LumiView Portable Binocular Microscope - User Manual - Manual (Page 14)

Cleaning
All glass surfaces, portable binocular microscope lenses, ocular or
eyepiece covers and lamp reflective covers can be cleaned with a
soft cloth moistened with alcohol.
The exterior surfaces of the portable binocular microscope and
power sources can be wiped clean with a soft cloth moistened
with alcohol.
NOTE: Avoid using harsh cleansing fluids or excessively
moistened cloths on any portion of the instrument.
Maintenance
Lamp replacement and cleaning may be performed by the user on
an as needed basis. Additional servicing should be performed by
returning the instrument to an authorized Welch Allyn Technical
Service Department or distributor. See “Service and Warranty
Information” section.
Specifications
Interpupillary Distance 49 mm to 74 mm
Light Source 3.60v, Halogen
Headband Adjustment Range Small, Medium and Large
Weight (No. 20500S) 80g
Transport and Storage -20°C to 40 o C 95% RH maximum
Approvals
UL 544, C22.2 No.125
IEC 601-1, IEC 601-l -2, CE