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This post was last edited by ztj1118 on 2015-11-3 at 15:55. Various problems can arise in daily use, and sometimes they cannot be resolved promptly, which directly affects work. To help customers understand the common issues related to the cardboard breaking strength testing machine, the editors from Kunshan Huakai Instruments will provide a detailed explanation below: No.1: When using slightly thicker cardboard, the degree of breakage is lower. Solution 1: Turn off the power switch of the machine. 2. Turn on the machine’s power switch, and simultaneously hold down the setup button to enter the system settings interface. 3. The first page displays the time setting page. 4. The setup button serves a shifting function. 5. The print button increases the value. 6. The peak value button serves a confirmation function and takes you to the next screen. 7. The second interface is the time setting page; press the peak value button to go to the third page, which is the breakpoint ratio setting page. The main reason for inaccurate or low test values in NO.2 is the presence of air inside the cylinder, which prevents an increase in oil pressure. Solution 1: Loosen the bolts on the oil reservoir. 2. Tap the rubber diaphragm several times; if there is air present, bubbles will emerge from the oil cup. 3. Hold the rubber diaphragm for about ten seconds until all air is expelled, then tighten the bolt. 4. If achieving the ideal state cannot be accomplished by following the above 3 steps, click the reset button and wait for 5–10 seconds for the machine to automatically reduce pressure. 5. Then loosen the bolts on the oil cup and wait for the rubber diaphragm to expand automatically. 6. Click the test button repeatedly to remove any air bubbles. Friendly reminder: 1. We would like to advise all users that after each test, it is essential to press the reset button on the fully automatic rupture strength tester. 2. If the reset button is not pressed, the previous peak value will be automatically recorded for the next test, which can easily cause the rubber membrane to break. 3. Pressing the set button is to save data, so that the machine can store it for printing. The cardboard box rupture strength testing machine often encounters the above two types of problems during regular use. If you would like to learn more about cardboard box rupture strength testing machines, feel free to contact us by phone!