Operation Keyboard
Reserved------Not used.
Quick Test-------Quick measurement, without anti-interference function.
Anti-Interference-------Interference-resistant measurement.
Normal Connection-------Measurement using the normal connection method.
Print-------After the test results are obtained, print the test data.
Reverse Connection-------Measurement using the reverse connection method.
Start-------Start the high voltage and begin measurement.
External Connection-------Measurement using the external connection method. Also used to select the capacitance of the external standard capacitor.
Stop-------Can interrupt the measurement during the test process.
2. When in use, the instrument's grounding terminal must be reliably grounded.
Turn on the power, the instrument first performs self-check
(Display screen, optical communication, memory, operation keys, digital-to-analog conversion, power grid frequency). After the self-check passes, it enters the main menu.)
3. Only when the instrument power is turned off, or the test voltage selection switch is set to the "Off" position, is it considered safe to contact the rear of the instrument and its measurement cables with the test object.
4. During the test process, it is strictly prohibited to operate the "Test Voltage" selection switch.
After entering the measurement state, the user can exit the measurement state at any time by pressing the "Stop" key.
5. In the normal connection method, the UH terminal outputs high voltage; in the reverse connection method, the Cx terminal outputs high voltage.
6. When in use, first measure the insulation condition of the test object (generally measured with a megohmmeter, >1000 megohms or above).
7. Select the test voltage gear according to the withstand voltage level of the test object. (Use the 10KV gear when higher than 10KV)
8. The special insulated cables provided by our company can be used on the ground. However, when the capacitance is less than 1000 pF, the measurement cable on the high-voltage side should preferably be suspended to ensure measurement accuracy.
9. Do not replace the fuse tube that does not conform to the panel indication value.
10. When using the instrument, do not arbitrarily replace the test cables provided by the manufacturer to ensure measurement accuracy.
Normal Connection Method: Before powering on, first set the "Test Voltage" switch to the "Off" position. Connect the UH terminal with the large iron clamp of the dedicated cable (marked UH) to the high-voltage end of the test object, and connect the Cx terminal with the core wire end of another dedicated cable (red, marked CX) to the low-voltage end of the test object's CX. Its shield wire end (black, marked E) should be grounded. If the low-voltage end of the test object has a shield terminal, use a wire to connect that terminal to "E" and then ground it. After powering on, press the "Normal Connection" key. Select the normal connection method: use the "Test Voltage" switch to select the voltage, then press the "Start" key to begin the test.
Reverse Connection Method: Before powering on, first set the "Test Voltage" switch to the "Off" position, ground the UH terminal, and connect the core wire of Cx (marked CX) to the high-voltage end of the test object's CX. After powering on, press the "Reverse Connection" key to select the reverse connection method: use the "Test Voltage" switch to select the voltage, then press the "Start" key to begin the test.
Special Note: In the reverse connection method, the shield "E" of the CX cable is at the same potential as Cx. E can be connected to the shield terminal of the high-voltage end of the test object. If there is no shield terminal, E must be left floating and absolutely must not be grounded! Otherwise, the output of the internal high-voltage transformer will short-circuit. The part from the CX clamp and E clamp to where the two wires cross must be at least 10 cm away from the grounding point to ensure that high voltage does not discharge to ground. This is to avoid damaging the instrument and ensure the safety of test personnel.
External High Voltage Method: (Cn is the external standard capacitor, CX is the test object.)
When the test voltage required for the test object is greater than 10KV or the capacitance of the test object is greater than 60000pF, an external high voltage can be used for measurement, that is, without using the internal high-voltage generator of the instrument, an external high-voltage device is used for measurement.
Note: When using the external high voltage method for measurement, the "Test Voltage" switch must be set to the "Off" position! Adjust the external voltage, then press the "Start" key to begin the test. (Note: The withstand voltage of the external standard capacitor must be greater than 30% of the external test voltage value.) After powering on, press the "External Connection" key to select the external connection method, set the instrument's "Test Voltage" switch to the "Off" position! Select the capacitance of the external standard capacitor, then adjust the external voltage, and press the "Start" key to begin the test. During the test, the message "Please turn off the external high voltage!" will be displayed, and it will pause for manual shutdown of the external high voltage. After turning off the external high voltage (must be turned off), press the "Start" key again to complete the test. If the external high voltage is not turned off, the test results will not be accurate.
{Selection of external standard capacitor capacitance: In "External Connection" mode, pressing the "External Connection" key once will change the displayed external standard capacitor capacitance "XXXXpF". There are eight capacitance values to choose from (the last one is for factory debugging, and is invalid for user use): 50pF, 100pF, 150pF, 200pF, 500pF, 1000pF, XXXpF, XXXpF.
The capacitance equal to the external standard capacitor should be selected. If the external capacitance used is special, the manufacturer can be requested to input the capacitance value into the instrument. If the selected external capacitance does not match the actual one, the measurement results will be affected.} This instrument has a Chinese LCD display with Chinese character prompts for various test information. After the test is completed, the "Print" key can be pressed to print the test results.
