Huazheng HZCS-3 ASTM D664 Insulating Oil Acid Value Meter Automatic Oil Acidity Tester

1.Preparation solution

Six kinds：Neutralizer(Ethanol—KOH) solution、Extraction、Standard acid solution、BTB aqueous solution、Washing solution、Anhydrous ethanol。

（1）Neutralizer(Ethanol—KOH): The white solid in the glass bottle labeled KOH supplied with the instrument transfer to the glass bottle with the Ethanol-KOH label as much as possible. And then inject about 100 ml of Anhydrous Ethanol in the glass and shake it completely so that it is completely dissolved. At last, set aside for a day and night.

（2）Extraction liquid configuration:

① Prepare a 1500ml container (A) and a 300ml reaction cup (B), pour 500ml isopropyl alcohol and 500ml petroleum ether into the A container;

② Take 1 bottle of extract medicine block (see above) into reaction cup B, add 10ml isopropanol and 10ml petroleum ether, stir the extract medicine block, isopropanol and petroleum ether in the reaction cup, stir and dissolve into the pre In the prepared A container;

③ Pour 10ml of petroleum ether and 10ml of isopropanol into the B reaction cup. After mixing petroleum ether, isopropanol and the residue, pour it into the A container again and stir evenly;

④Finally, the mixed liquid in container A is poured into empty glass bottles (empty bottles containing isopropyl alcohol and petroleum ether can be used), the cap is screwed tightly and shaken sufficiently to completely dissolve, and the extraction liquid is completed.

（3）Extraction：The essential materials include a container(a clean and dry drinking water bottle is allowed) that more than 1000ml capacity, a reaction cup,500ml Isopropyl Alcohol and 500ml Petroleum Ether. Open the plastic bag with the extract provided with the instrument, put the extract in the reaction cup, and add a small amount of isopropyl alcohol and petroleum ether to dissolve, transfer the solution to the large container prepared in advance, then wash the reaction cup with petroleum ether and isopropyl alcohol several times. The cleaning liquid is poured into the large container together. The remaining petroleum ether and isopropyl alcohol are all poured into the large container and shaken. At last, inject the solution in the blank bottles which contained Isopropyl Alcohol and Petroleum Ether.

（4）Standard acid solution：The solution is the 0.15mol/l Potassium hydrogen phthalate solution，which can access directly in the small glass bottle.

（5）BTB aqueous solution：Open the bag with BTB provided with the instrument and transfers it in the 100ml container as soon as possible. Then inject 100ml Anhydrous Ethanol and shake it completely. Draw 0.5 ml of this solution with the graduated pipette and add 50ml distilled water, and then there is the BTB aqueous solution. 

（6）Washing solution：Transfer the white solid in the glass bottle labeled with KOH to the wash gas cylinders as soon as possible. Then inject 50ml water and shake it completely .At last set aside to use.

（7）Anhydrous ethanol：Inject Anhydrous Ethanol in the wash bottle provided with the instrument. 

2.Pipeline connection

Open the instrument back cover，put in the three plastic bottles of anhydrous ethanol, washing gas cylinders, neutralizing liquid (ethanol-KOH) from left to right.

Connect another port of neutralizing liquid (ethanol-KOH) to the interface affixed with a neutral label with a hose; Inject the extract from the reagent bottle into the extraction cell; Connect the bottle of anhydrous ethanol to the interface affixed with a anhydrous ethanol label with a hose. Press the pressure arm of the peristaltic pump and lock it。After confirming correctness, close the instrument back cover。

As the picture shows：

1.The peristaltic pump hose is easy to wear. Please check whether the hose is damaged or adhesion carefully to reduce the impact on the instrument。If there is any abnormal, replace the hose. After the instrument finished, please release the squeeze arm of the peristaltic pump to prevent the peristaltic pump hose from being damaged by the arm.

2.It is recommended to re-calibrate with standard acid if the instrument is not used for more than three months.

3.When preparing the extract, the container must be dry and cannot have water. The extract is sealed and stored.

4.When the test is continuous, it is allowed that the cup cannot be cleaned. If not, the cup must be cleaned and the sample cups should be completely dry before use.

5.After the test must be cleaned off.