After the instrument is powered on or the reset key is pressed, it enters the initial state (1). At this time, the cursor pointer points to "Resistance". Press the "OK" key directly to enter state (2), which displays the changing charging current and measurement time. After charging is completed, it automatically enters state (3), displaying the resistance value, measurement current, and measurement time. At this point, each press of the "OK" key stores a measurement result (models with a printer also print the measurement result simultaneously). Press the "Reset" key to exit resistance measurement and enter state (4), which displays the discharge current. After discharge is completed, it automatically returns to the initial state (1), completing one resistance measurement.
2. Number Setting
Inputting the device number helps in searching memory data. In the initial state (1), point the cursor to "Settings" and press the "OK" key to enter state (5), which displays the current device number. Press the "OK" key again to enter state (6), prompting to input a new device number. At this time, pressing the "Select" key cycles the current input digit from '0' to '9', then from 'A' to 'Z'. When the desired number or letter is found, press the "OK" key to input that digit. Then input the next digit in the same way. After inputting six digits, return to state (5), which displays the newly input device number. Press the "Reset" key to return to the initial state (1).
3. Memory Operation
In the initial state (1), move the cursor to "Memory" and press the "OK" key to enter state (7), which displays the total number of records in the current memory. At this time, pressing the "Select" key can enter state (8), displaying memory record contents sequentially starting from the latest record. NNNNNN represents the device number of that record, and MM represents the MM-th resistance value of that device. During measurement, each time the "OK" key is pressed to store a measurement result, the MM value increases by 1. Each time a new device number is input, the MM value restarts from 1. Pressing both the "Select" and "OK" keys simultaneously will clear all data in the memory. Press the "Reset" key to exit memory operation and return to state (1). The memory can store up to 120 measurement results. After exceeding 120, the oldest records will be overwritten. The memory content can be retained for a long time without loss even under power-off conditions.
Instrument Precautions
1. When measuring an on-load tap changer transformer, be sure to reset before switching the tap changer. After discharge is completed, wait until the discharge prompt tone ends and the prompt message disappears before switching the tap changer.
3. After the test is completed, press the "Reset" key. Be sure to wait until the discharge indicator light goes out and the prompt message disappears before turning off the power and disconnecting the wires.
4. During the test, please avoid power outages or test clamp detachment.
5. Before connecting the power supply, connect the ground wire first. After the test, disconnect the ground wire last.
Classification Test Methods
A: DC Power Supply Test: Close the main power switch, and the corresponding indicator light will turn on. Press the "Start/Stop" key to begin the test. After the test, press the "Reset" key. The instrument displays "Discharging". Wait until the instrument returns to the startup interface, then turn off the main power switch, and the corresponding indicator light will go out. Then switch the test clamps for another test.
B. AC Power Supply Test: Connect the AC 220V power supply, the "Charging" indicator light will turn on. Close the main power switch, and the corresponding indicator light will turn on.
DC Resistance Tester Features
1. Built-in rechargeable battery pack, no AC power supply needed for on-site testing, convenient to use.
2. The output charging current can reach up to 2A, providing fast test speed.
3. The resistance measurement range is 1μΩ-2KΩ, with a wide range.
4. Uses high-quality imported components and software designed with multiple anti-interference programs, ensuring high accuracy and good repeatability of measurement results.
5. LCD display mode, suitable for various working environments.
