Balance maintenance knowledge Shimadzu balance instructions 1. Why does the balance need to be calibrated? The item we weigh is to know its quality, but the internal data processing of the balance is based on the weight, which involves the acceleration of gravity. The acceleration of gravity changes with the latitude and longitude and altitude, W=M*G , ( W is the weight, M is the mass, G is the acceleration of gravity) The change of G , and W also changes, which mainly affects the range change of the balance. Therefore, after the balance is installed and warmed up, a balance correction must be made to the balance to obtain an accurate weighing result. 2. Why should the balance be warmed up? Electromagnetic balance balance is composed of sensor, magnetic steel body, coil, circuit board, etc. When the coil is energized, the components on the coil and circuit board will heat up, and the temperature will change instantaneously. The temperature change will affect the balance range and The change of zero point will cause the data to drift and become unstable when weighing. Therefore, the balance must have sufficient warm-up time after starting up. It is recommended that: one hundred thousandth of a balance ( AUW-120D and AUW-220D ) be preheated for more than 120 minutes, one ten thousandth of a balance ( AUW/AUX/AUY series) Heat 30 - 60 minutes, one thousandth of a balance can be warmed up for 30 minutes. To reduce the warm-up time and speed up the balance, you can open the left and right glass doors (about 5 cm) when warming up . After the balance is warmed up, a balance correction must be made to the balance to maintain the accuracy of the balance weighing data. 3. Why does the fully automatic calibration balance appear frequently? The frequent occurrence of corrections is mainly due to changes in the environment. There are two main types of automatic calibrations for current positioning: temperature triggering ( PSC ) and time triggering ( Clock-CAL , AUW-D , AUW and UW only ). The time trigger is to automatically adjust the balance at three time intervals in the balance, and the temperature trigger is to automatically correct the balance from time to time as the environment changes. Frequent occurrences are mainly temperature effects, so avoid room temperature fluctuations in rooms where more than one tenth of a scale is placed. 4. How to avoid frequent calibration and stable measurement data? Maintain the balance of temperature and humidity in the balance weighing chamber, avoid the flow of strong convective air, avoid vibration around the balance, and avoid high temperature radiation. In operation, care should be taken to avoid frequent hand-in and out of the weighing chamber, otherwise it will easily cause unstable readings. 5 , the use of precautions: 1 ) Please read the balance operation manual carefully before use to avoid damage caused by misoperation to the balance; 2 ) Before the power is turned on, the level of the balance should be adjusted first, put on the tray, the windproof ring, and then energized; 3 ) For the UW series, before the power is turned on, the transport screw at the bottom of the balance should be turned counterclockwise to the end, adjust the level, put the support pad and the tray, and then energize; 4 ) Preheating after energization, the glass door is slightly opened when preheating (about 5 cm, more than one ten thousandth of the sense), which can reduce the warm-up time; 5 ) After the preheating is completed, correct the range calibration according to the operation manual. 6 , simple troubleshooting 1 ) AU series: CAL E2 : During the calibration process, the weighing pan has objects and the objects are removed; CAL E4 : The calibration weight is not accurate during the calibration process and the correct weight is used. Please refer to the operating instructions for some troubleshooting. 2 ) UW series: CAL E0 This fault indicates that the bottom of the balance transport screw has not been loosened, turn the balance over, turn the transport screw in the release direction (counterclockwise direction), and then power on. Veterinary Solution Disinfectant Veterinary Solution Disinfectant,Povidone Iodine Disinfectant,Ivermectin Pour On Solution,Povidone Iodine Disinfectant Solution Shandong Unovet Pharmaceutical Co.,Ltd. , https://www.unovetcn.com