ABBE REFRACTOMETER MANUAL PDF

Instruction manual. Allen wrench for detaching/attaching prism. ACCESSORIES. SPECIFICATIONS. DIGITAL ABBE REFRACTOMETER. 2. Refraction view. B+S code. Abbe Refractometer see below for part number comprising: 1 Operating Instructions. 1 Instruction manual CD-ROM. 1 Power supply. Stanley Ltd. can assume no responsibility for errors contained in the manual or their consequences. Abbe 5 Refractometer complete with accessories.

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Nanual the presence of what appear to be knobs one large one at the front and a smaller one at the rear which are the bulbs for illuminating the sample and the scale. With the borderline near the center of view, adjust the compensator dial to remove any color it may not be possible to remove all color.

On this instrument the power switch is at the rear. The light source for reftactometer instrument is internal, but it can be viewed through the vent holes on the right side just below the sample stage. Focus the borderline sharply by adjusting the eyepiece. Switch off the water bath, if it was used.

Operating Instructions for Abbé Refractometers

Allow the bath to warm up for several minutes before checking the thermometer on the side of the manuall to verify that the proper temperature has been reached; adjust the temperature of the water bath as needed. If desired, turn on the water bath and set it for Bring the borderline into the crosshairs, as shown in Fig. The prism coarse adjust and fine adjust knobs are the large and small knobs, respectively, located on the right side of the instrument.

This document will babe a brief general overview of the operating procedure and will point out where the instruments differ in either control layout or in order of operations.

If you do not know the approximate index of refraction, you can simply observe the position of the borderline and use the prism adjusting knob to bring the borderline to the center refractomeetr the viewing field. The focus of this page is not to provide an exhaustive treatise on the theory of refractometry, and so the interested reader is referred to the literature for more information.

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It is important that you do not use too much sample which makes a mess and can decrease accuracy or too little sample refractometsr will result in a poorly defined borderline, vida infra. The upper prism case should be closed at all times, except when a sample is being loaded or the sample stage is being cleaned.

Place a drop of the sample on the sample stage and close the upper prism case.

To place a sample in the Bausch and Lomb, swing the light source out of the way forward and down and open the upper prism case the metal case in the center of the instrument. On the Fisher manuual both views are displayed simultaneously, as shown in Fig.

On refdactometer instrument the compensator is a dial located on the front of the instrument behind a protective plastic refractometdr in this view below the eyepiece and above the sample stage. There are two refractometers available for your use; a Bausch and Lomb, shown in Fig.

Turn on the refractometer on the back of the Bausch and Lomb, or on the left side of the Fisher. Unlike the Bausch and Lomb, the Fisher refractometer has only one prism adjusting knob. View through the eyepiece of the Fisher refractometer. Three decimal places can be read directly from the scale; a fourth place can be estimated.

DMF; phenols, cresols and other tar acids; acetic acid solutions; N, N-dimethylacetamide; THF; mixtures of esters especially methyl acetate and vinyl acetate ; some lacquer thinners; strong mineral acids and bases.

To see the scale on the Bausch and Lomb, depress and hold the contact switch on the left rear of the instrument while looking through the eyepiece.

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Read the index of refraction by depressing and holding the switch on the left rear of the Bausch and Lomb, or directly on the Fishersee Fig. If you are using the Bausch and Lomb, the light in the clear ball on the swing arm should come on, while you should observe light coming through the vent holes on the right front of the Fisher just below the sample stage.

Before starting the instrument check that the water connections are tight, and that the sample stage is clean and dry. Close the upper prism case.

The scale should look like that shown in Fig. Wash the sample stage with a small amount of wash acetone refractomster gently pat dry. For the Bausch and Lomb move the light source into position, while for the Fisher simply close the latch. The following solvents and compounds cannot be analyzed on this refractometer: For the Fisher, first disengage the sample stage latch and swing the upper prism assembly toward you.

The Bausch and Lomb refractometer right side view. This switch toggles between the two views shown in Fig. At the end of the day, clean the sample stage, and close the upper prism case.

Operating Instructions for Abbé Refractometers | Chem Lab

Turn off the refractometer. When you are finished measuring a sample, use a Kimwipe to dab away any remaining sample. Once the you have made the coarse adjustment mmanual the Bausch and Lomb, release the switch to view the boundary line with the Fisher refractometer, you only need to shift your focus upward.