HK-3160SZ Automatic Oil Acid Number Tester is according to GB/T 7599-1987. Inject the fixed volume extract liquor and the known weight sample, After stirring and extraction, then inject 0.02～0.05mol/L Potassium hydroxide drops of ethanol solution until the color change into blue-green. Report the milliliter quantity of the Potassium hydroxide ethanol solution used to calculate the sample acid number.

1. Definitions：

Acid number：n-the quantity of base, expressed as milligrams of potassium hydroxide per gram of sample, required to titrate a sample in a specified solvent to a specified end point.

2. Significance and use

    2.1. New and used petroleum products may contain acidic constituents that are present as additives or as degradation products formed during service, such as oxidation products, The relative amount of these materials can be determined by titrating with bases. The acid number is a measure of this amount of acidic substance in the oil, always under the conditions of the test. The acid number is used as a guide in the quality control of lubricating oil formulations. It is also sometimes used as a measure of lubricant degradation in service. Any condemning limits must be empirically established.

    2.2. Since a variety of oxidation products contribute to the acid number and the organic acids vary widely in corrosion properties, the test method cannot be used to predict corrosiveness of oil under service conditions. No general correlation is known between acid number and the corrosive tendency of oils toward metals.

◆ Adopt titration neutralization principle; automatically complete injection, titration, stir, judging and titration end. And then automatically display the test result and print the data.

◆ 800*480 resolution touch screen, intelligent human-computer interface.

◆ Neutralization solution titration dosing method replaces the traditional peristaltic pump dosing method to make it more accurate.

◆ The sensor is imported from developed country and not interference by ambient light, the performance is stable.

◆ The tester can test 6 kinds of oil samples.

◆ With Ethernet, USB external communication interface, easy for upgrading and remote control.

◆ 1000 sets records can be saved ,and if needed ,by date index ,all the records can be checked ,printed and exported.

1、 Power consumption：≤50W

2、 Test cup：6 cup

3、 Measurement range ：0.0001～0.9999 mgKOH/g

4、 Minimum resolution：0.0001 mgKOH/g

5、 Accuracy ：Acid number<0.1; ±0.005 mgKOH/g

                         Acid number≥0.1； ±0.01 mgKOH/g

6、 Repeatability：0.01 mgKOH/g

7、Outside and weight：L415mm×W330mm×H270mm, 15kg

Application Environment：

1、 Power supply：1) AC(198～242)V, 50/60Hz; 2) AC(120±10%)V, (60±1)Hz

2、 Ambient temperature： (5～45)℃

3、 Ambient relative humidity：≤85%

# The instrument should be put into a no air flow laboratory and on a stable and no glare table.

# The laboratory should have fire extinguisher and other extinguish material.

# Don’t put any inflammable、explosive and strong corrosive gas or liquid around the instrument, no strong electromagnetic interference and obvious mechanical shock.