An analog multimeter needle moving backward during voltage measurement does not necessarily indicate a defective instrument. Understanding the operating principle, common causes, and proper inspection procedures helps prevent misdiagnosis and unnecessary repairs.
Learn how to choose and use a feeler gauge correctly to reduce measurement errors during mechanical inspection and maintenance.
A power quality analyzer can record the entire sequence of events—before, during, and after—a momentary power outage. Based on the captured voltage, current, and waveform data, engineers can pinpoint whether the fault originated from the utility grid or the facility's own electrical system, rather than relying on speculation based solely on external symptoms
You can easily check for weak or unstable power right at home using a multimeter. After just a few minutes of measuring the voltage, you will be able to determine whether the power supply is experiencing a voltage drop or if the issue lies with the wiring, the outlet, or the appliance itself.
When using metric or inch feeler gauges, the measurement system should match the product's original design specifications. Otherwise, conversion and rounding errors may accumulate across multiple mating surfaces, causing the final clearance to deviate from the intended design value.
"Silent capacitor burnout" refers to a phenomenon where a start capacitor gradually loses capacitance without exploding or emitting smoke, making it difficult for the user to detect the issue until the motor has sustained severe damage. The appliance continues to operate but runs sluggishly, overheats, and consumes twice the normal amount of electricity. Without periodic inspections, a component costing only a few tens of thousands of dong could force you to replace the entire motor, air conditioner compressor, or ceiling fan an expense running into the millions.
A smaller clearance is often associated with higher precision. However, in mechanical engineering, reducing clearance does not necessarily make a mechanism operate more accurately.
An analog multimeter can still be used to quickly check if a capacitor is shorted, open-circuited, or capable of charging and discharging. However, if precise capacitance measurement or an assessment of capacitor quality is required, a digital multimeter or LCR meter will yield more reliable results
By simply measuring the rotational speed (RPM) and comparing it against design specifications or historical maintenance data, engineers can detect signs of belt slippage, speed reduction, or power loss without needing to disassemble the motor
Measuring pump shaft speed helps determine the equipment's actual rotational speed (RPM), allowing for comparison against design specifications to detect issues such as belt slippage, incorrect gear ratios, abnormal motor operation, or failure to achieve the desired flow rate. Depending on operating conditions, engineers may choose a laser tachometer, a contact tachometer, or a stroboscope
ຮັບສ່ວນຫຼຸດພິເສດຕາມປະລິມານ, ອັບເດດລາຄາຂາຍສົ່ງ ແລະ ການແຈ້ງເຕືອນສິນຄ້າໃໝ່ສົ່ງກົງເຖິງອິນບັອກຂອງທ່ານ.
ໂດຍການສະໝັກສະມາຊິກ, ທ່ານຍອມຮັບ ເງື່ອນໄຂການໃຫ້ບໍລິການ ແລະ ນະໂຍບາຍຄວາມເປັນສ່ວນຕົວ ຂອງພວກເຮົາ.
ເຂົ້າເຖິງຜູ້ຊ່ຽວຊານທີ່ໄດ້ຮັບການຢັ້ງຢືນຂອງພວກເຮົາໂດຍກົງ
