As an important testing instrument in industrial production sites, the electrical parameter measuring instrument plays a crucial role in ensuring the verification of product quality reliability. How to wire an electrical parameter measuring instrument? How to adjust the voltage? The following shares the wiring steps and usage methods of the electrical parameter measuring instrument. ### How to Wire an Electrical Parameter Measuring Instrument The PM9830 has two wiring methods: three-phase three-wire (3Φ3W) and three-phase four-wire (3Φ4W). - The red wire is for connecting the input, such as a three-phase transformer, commercial power, etc. - The blue wire is for connecting the load, such as a motor, oven, etc. From left to right, every four terminals form a group, corresponding to phase C, phase B, and phase A respectively. The factory default is three-phase three-wire system. If you have moved the black wire and forgotten how to connect it, just follow the three-phase three-wire system. - For three-phase three-wire (3Φ3W): The black wire N below is for connecting the neutral wire, and the neutral wires are connected in parallel. #### Display Window The display window consists of three columns and two rows: DISPLAY A, DISPLAY B, and DISPLAY C. - The upper 3 windows synchronously display the voltage (current or power) of phases 1/2/3. - The lower 3 windows respectively display phase 1/phase 2/phase 3 or the average value (∑). - V stands for voltage, A for current, W for power, PF for power factor, Hz for frequency, TIME for time, and K for the order of magnitude "thousand" (e.g., 1k = 1 thousand). ### How to Adjust the Voltage of an Electrical Parameter Measuring Instrument Adjust the voltage regulator from the "zero" position to the rated voltage of the product (220V), and then you can read the electrical parameters of the product from the instrument display, such as input power, current, voltage, frequency, or power factor. After entering the setting mode, use the right button (→) and the up button (↑) to adjust the corresponding parameters. You can set a ratio of 1:10 or 1:100 according to your needs. ### Usage Method of the 877501 Battery Tester 1. Connect the positive and negative poles of the output wire properly: the positive pole of the battery capacity tester is connected to the positive pole of the battery, and the negative pole is connected to the negative pole of the battery. After connection, an alarm beep will sound, which is a prompt after the battery capacity tester is powered on. 2. Now press the select button to try adjusting the discharge current; the cut-off voltage is also set by pressing the select button. There are other buttons: the reset button can stop the beeping. Then the instrument will start recording the discharge time. 3. Then select the discharge current: 5A for 7-14AH, and 10A for 17-24AH. 4. Then test the battery capacity: the test voltage is 10.5V, and the voltage for deep discharge is 3V. 5. When the discharge stops, the alarm beep will also stop. Now that the test is completed, you can remove the battery. Record the discharge time; the calculation formula is: Battery capacity = discharge current × discharge time. ### Steps to Test the Condition of a Battery with a Battery Tester 1. When using, connect the battery tester to the battery for 10-15 seconds. If the voltage remains between 10.5-11.6V, it means the battery is in good condition with sufficient power. 2. If the voltage is between 9.6-10.5V, it means the battery is in good condition but has insufficient power. 3. If the voltage is below 9.6V, the battery is faulty or has severely insufficient power. ### How to Use a Battery Tester? 1. After properly connecting the positive and negative poles of the output wire, connect the positive pole to the battery's positive pole and the negative pole to the battery's negative pole. At this time, you will hear the instrument's alarm beep. Use the remote control to switch between displaying time and voltage. 2. Press the current selection button, voltage selection button, reset button, and discharge button. After the beeping stops, the instrument will start recording the discharge time and displaying the battery voltage. 3. Selection of discharge current: 5A for 7-14AH, 10A for 17-24AH. The selection of discharge voltage and the test battery capacity is 10.5V, and 3V for deep discharge. 4. When the discharge stops, an alarm beep indicates the end. Remove the battery and record the discharge time. The battery capacity is equal to the discharge current multiplied by the discharge time. Note that the discharge time is calculated in hours, and 6 minutes is 0.1 hours. Source: Bingrong's离谱 (Bingrong de Lipu), Jiahe Youju