Robinair 75240 Hand Refractometer - Manual

75240 Hand Refractometer
518712 Rev. A - (1/22/03)
SPX Corporation
655 Eisenhower Drive
Owatonna, MN 55060-0995 U.S.A.
Tech Serv.: 1-800-822-5561
Fax: 1-800-822-7805
Customer Serv.: 1-800-533-6127
Fax: 1-800-283-8665
Website: www.robinair.com
• Read and follow all warnings in this
instruction sheet before operating this
unit. If the operator cannot read
English, operating instructions and
safety precautions must be read and
discussed in the operator’s native
language.
- Si el operador no puede leer el inglés,
las instrucciones de operación y las
precauciones de seguridad deberán
leerse y comentarse en el idioma
nativo del operador.
- Si l’utilisateur ne peut lire l’anglais,
les instructions et les consignes de
sécurité doivent lui être expliquées
dans sa langue maternelle.
• Always wear eye protection and
protective clothing when working with
refrigerants and sulphuric acid.
Contact with refrigerants and
sulphuric acid may cause personal
injury.
• Do not drink antifreeze (propylene or
ethylene glycol base) or solution
(sulphuric acid base). If swallowed,
give two glasses of water and induce
vomiting. Call a physician.
SPECIFICATIONS
Style: Battery/Coolants
Model: 75240
Range: – 60 °F ˜ 32°F / 1.15 ˜ 1.30 sg
Resolution: 10 ° F; 0.01 sg
Size: 27 x 40 x 160 mm
Weight: 176 g
WARNING! To prevent equipment failure or
damage resulting in personal injury:
Operating
Instruction
Sheet
1. Prism
2. Cover plate
3. Correction screw
4. Mirror tube (holds the reticle scale)
5. Eyepiece (focusing ring of diopter)
Accessories
Eyeshade Screw driver Leather cover
Glass rod Soft cloth
Application
The 75240 Hand Refractometer is a portable, precision
optical instrument used for measuring the freeze point
of engine coolant and the operation state of battery
charging liquid. It is used on transportation vehicles,
such as cars, tractors, tanks, ships, etc., which use
propylene or ethylene glycol for coolant and sulphuric
acid for charging liquid.
When a liquid (such as coolant or charging liquid) is
placed on the prism, the light passing through it is bent.
The more concentrated the liquid, the more the light
will bend. The refractometer contains a reticle, or scale,
that is enlarged through the eyepiece to measure this
bent light.
The values of the scale have been established to
evaluate the coolant or charging liquid.
The reticle without
any liquid on the
prism. The reticle with liquid on the
prism. The reading is taken at
the point the shadow line
crosses the scale.