euromex RF.6612 Analog Refractometer User Manual
- June 5, 2024
- euromex
Table of Contents
euromex RF.6612 Analog Refractometer
Introduction
With your purchase of a Euromex hand refractometer you have chosen for a quality product. The Euromex hand refractometers are developed for use in laboratories and in the food industry. The maintenance requirement is limited when using the refractometer in a decent manner. This manual describes the construction of the refractometer, how to use the refractometer and maintenance of the refractometer.
General safety instructions
- This product is a high quality optical instrument. Delicate handling is required
- Impacts, even small ones, can affect the precision of the device
- Keep the device and its optics clean for maximum performance
- Precautious should be taken with the samples; substances under observation may be a risk to the health of humans and other living organisms or the environment
Construction of the refractometer
The names of the parts are listed below and are indicated.
| A | Prism |
|---|---|
| B | Cover |
| C | Adjustment screw (underneath protective cap) |
| D | Adjustable eyepiece |
Functions of the refractometer
The Euromex hand refractometers are widely used for measuring sugar concentrations. In the table below the different models are shown with their specific way of calibrating them
| Model | Type | Range | Accuracy | Calibration |
|---|---|---|---|---|
| RF.6612 | High contrast | 0~12g/dl |
1.000~1.0SOsg
1.3330~ 1.3600RI| 0.2
0.002
0.0003| distilled water
RF.6614| High contrast| 2~14g/dl
1.000~ 1.06sg (dog)
1.000~1.06sg (cat)| 0.1
0.001
0.001| distilled water
Standard accessories
For all types: carrying case, screwdriver or alien key for scale adjustment, plastic pipette
Working with the refractometer
Prior to the actual measurement, the scale should be checked if it is correctly calibrated. If not, the scale should be adjusted by using the supplied tool to turn the scale adjustment screw (C). For this check distilled water is used.
Calibrating using distilled water
Open the prism cover (B) and put a drop of distilled water on the surface of prism (A). Close the prism cover and look through the eyepiece (D). You will see the horizontal demarcation line as well as the scale in the field of view. If the scale is correctly calibrated the horizontal demarcation line should be exactly on the •w• line for RF.6612 and for RF.6614 the line should be at the 1.00 position of the scale. If not, one can adjust the scale with the screwdriver until the demarcation line is at the scale’s correct position
Light entrance
Usually, daylight is good enough for all types of hand refractometers but, depending of the kind of sample, one can also direct the refractometer to a bright light source.
Actual measurement
After calibration wipe off the distilled water, or dispersion fluid so you will have a clean surface to start with. Put a few drops of the specimen on the prism. Close the prism cover and the percentage of the measurement can be read at the position of the demarcation line.
Maintenance and cleaning
Always clean the prism of the refractometer after use with a soft tissue
Warning
Cleaning cloths containing plastic fibres can damage the coating of the prism!
All information maybe changed without prior notice
Euromex Microscopen bv • Papenkamp 20 , 6836 BD Arnhem , The Netherlands
T +31 (0) 26 323 22 11 • [email protected] •
www.euromex.com