This color tester is suitable to determine color of various lubricating oils and other petroleum products as per industrial standard of China SH/T 0168-92 Standard Test Method for Color of Petroleum Products. The test methods are as follows: Fill test sample into color comparing tube and compare sample color with standard color to ascertain its color number. Please see the attached color number comparing sheet to find out the similarity between color number of the instrument and color number in standard GB/T6540.

1. The colorimeter is composed of standard color dial, observation lens, light source and color comparing tube.

2. The light source is a 220 V, 100 W, with temperature of 2750±50 K grinding milk white light bulb. After filtering color by milk white glass and sunshine filtering glass, the spectrum characteristics of light gained from sunshine is similar to it. The standard light will change into two parallel lights, which is similar in size, trough plane reflection mirror and prism. The parallel lights will irradiate on sample in the color comparing tube on the color glass of standard color dial evenly and respectively.

3. There are 26 pieces of Φ14 light holes. And standard color glasses having 1～25 color number are installed in the 25 of these holes in sequence. The 26 hole is blank. The color dial is rotated by a hand wheel installed at right side of instrument to choose the correct color during color comparing test. The standard color comparing glass on the color dial should be calibrated by standard color comparing liquids.

4. The color comparing tube is Φ32 mm, 120～130 mm high non-colorful flat bottom glass tube. The color comparing tube is placed into instrument trough a lid on the top of the instrument.

5. The observation lens is composed of concave mirror and separated bar. You can see two semicircle colors through observation lens. The right semicircle is standard color. The light and focus of optical observation lens can be adjusted, so it is easy to be used.

Ⅲ. Technical Data of ASTM D1500 colorimeter

Ⅳ. Working Principle and Applicable Standards:

The petroleum product colorimeter operates mainly based on the colorimetric principle. The built‑in standard light source illuminates both the sample and standard color filters, and the colors of the two are compared simultaneously through an optical eyepiece.

Core Principle: Pour the petroleum product sample into a color‑comparison tube, and compare it one by one with No.1‑25 standard colored glass filters on the standard color disk. When the sample color matches one filter, the number of that filter is taken as the color number.
Main Applicable Standards Domestic Standards: SH/T 0168‑92 Test Method for Color of Petroleum Products, GB/T 6540 Test Method for Color of Petroleum Products, DL/T 429.2‑2016 Test Method for Color of Oils Used in Electric Power System.
International Standards: ASTM D1500 Standard Test Method for Color of Petroleum Products, ISO 2049 Petroleum products — Determination of colour (Colorimetric method).

Color Number Comparison:   SH/T 0168 (No.1‑25) and ASTM D1500, GB/T6540, ISO 2049 (No. 0.5-8)

‑ Differences among different color measurement methods ‑ ASTM D1500 Color: Applied to lubricating oils, diesel oils, mineral insulating oils, etc. Color number range: 0.5‑8.0. ‑ Saybolt Color: Applied to refined products such as gasoline and aviation fuels. Color number range: ‑16 to +30. ‑ Pt‑Co / Hazen / APHA Color: Applied to transparent liquids such as water and chemicals.

At Lucyelec Test Equipment Co., Ltd., we take pride in offering the high-qualified Petroleum Color Scale ASTM D1500 Oil Color Meter. It used to observe darkening of oil by comparing it to previous samples of oil from the same transformer. Transformer oil colour is determined by means of transmitted light and given a numerical value (0.5-8) based on comparison with a series of color standards. Noticeable darkening oil indicates either contamination or that arcing is taking place.

Service: The ASTM D1500 colorimeter will be repaired and replaced free of charge for product quality problems within one year from the date of purchase, and will provide lifetime warranty and technical services. If you find any abnormalities or malfunctions in the instrument, please contact the company in time to arrange the most convenient solution for you.

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Lucyelec engaged in oil Analysis and electrical test equipment since 2015, is your reliable partner and professional provider of test and measurement instruments in Baoding China. If you have any inquiry about quotation or cooperation, please contact by WhatsAPP: +86-15194785871, or email us at info@lucyelec.com  Our sales representative will reply you within 24 hours. Thank you for your interest in our products.