KESWB type DC current leakage meter

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KESWB type DC current leakage meterUsed to measure DC leakage current or circuit current values, digital microampere meters can be used in conjunction with DC high-voltage generators and various test transformers.

KESWB type DC current leakage metertechnical indicators

1. Working voltage: DC9V (multi-layer battery)

2. Measurement accuracy: 0.5% (special accuracy can be customized)

3. Range: 0-1999 μ A/0-19999 μ A (two ranges for users to choose from, special ranges can be customized)

4. Resolution: 1 μ A

Note: Other special current specifications can be customized.

Abbreviation: DC digital microampere meter, DC withstand voltage leakage current measurement, is an important test item in preventive testing procedures. However, traditional pointer microampere meters have large reading errors when measuring DC leakage current,Disadvantages such as inability to protect against surge current. High voltage digital shielded microampere meters have overcome the aforementioned drawbacks. It has reliable use, is not afraid of discharge shock, high accuracy, clear digital display, stable indication, large range, strong overload capacity, and can automatically switch range (shift). In order to prevent stray currents from entering the meter at the testing site, the material of the instrument housing is selected as a lightweight metal housing to ensure good shielding of the instrument. Strong ability to resist interference and surge current, it is a replacement for traditional pointer microampere meters.

In magneto electric measurement institutions, due to the thin wires of the movable coil and the fact that the current also passes through the balance spring, the allowed current to pass through is very small, about a few microamperes to several hundred microamperes, so its practical value is very small. According to the principle that parallel circuits have a shunt effect, in practice, to measure large currents, a shunt resistor must be added. Therefore, a DC ammeter is usually composed of a magneto electric measuring mechanism and a shunt resistor connected in parallel. Due to the fact that magnetoelectric ammeters can only measure direct current, they are also known as direct current ammeters.

The selection of commonly used DC ammeters is the same as that of DC voltmeters. If a shunt is used, it must be used in conjunction with the ammeter. The wiring of a DC ammeter has polarity, and the positive pole of the power supply (the pole where the current flows out) must be connected to the+terminal of the ammeter, and the - terminal of the ammeter must be connected to the negative pole of the power supply (the pole where the current flows in). When the polarity of the DC meter is unclear, a DC voltage regulator can be used to temporarily connect the voltage and current by reducing them. When the pointer is biased towards the correct direction, it means the wiring is correct. When it is biased towards the opposite direction, the positive and negative poles (+, -) can be swapped and connected. Connection of DC ammeter

DC ammeters can be divided into ammeters, milliammeters, and microamperometers according to their ranges, represented by symbols A, mA, and uA, respectively.

Operation Manual

The display lights, switches, knobs, etc. on the control box have been clearly marked. Please refer to the component names on the panel of the control box when reading this operating instruction.

There are seven core sockets on the side of the high-voltage tower chassis for connecting control box cables, and copper terminals on the side of the chassis for connecting ground wires.

The high-voltage shielded ammeter is a digital microampere meter, and the socket on the top of the meter is a wire socket for connecting the test sample. It also serves as a power switch. When not in use, please unplug the plug to automatically turn off the power. When replacing the battery, please open the screws on the top cover, and after replacement, please fasten the cover and tighten it with screws. Open the back cover of the flat dial watch when replacing the battery.

1Connect the grounding terminal on the control box panel to the grounding terminal of the high-voltage tower with a grounding wire and firmly connect the grounding wire on site or in the laboratory. To ensure the safety of your current device,Please make sure to repeatedly check the grounding wire to ensure that all grounding wires are in good condition.

Connect the control box to the high-voltage tower using a seven core cable, with the same quick aviation plug at both ends of the cable. Pay attention to aligning the notch on the side of the plug with the thick protrusion on the inside of the socket and inserting it clockwise. (Either end of the cable can be connected to the control box or high-voltage tower) Connect the power cord, and the power supply is single AC220V, power frequency50Hz.

2Turn on the power switch, and the green light on the power switch and the panel indicator will light up. If the high voltage indicator green light is on, and the high voltage buzzer is in the on position, it will sound to prompt the operator to apply high voltage. At this time, rotate the high voltage output adjustment knob clockwise to increase the high voltage, and the voltmeter will display the voltage on the load test sampleKVThe ammeter displays the sum of the current flowing through the test sample and all leakage currents, but does not include the current of the built-in high-voltage divider. Current is measured in microamperesUAValue.

If the power switch is turned on, the high voltage display green light does not light up and the fault display is in progressWhen the "return to zero" red light is on, it indicates that the high-voltage output adjustment knob is not in the zero position. Please rotate this knob counterclockwise to the "zero position" and return the fine adjustment voltage knob to the zero position. The "return to zero" light will turn off, and then adjust it clockwise to increase the voltage.

3If the regulation protection within the rated output voltage range is not required, the overvoltage protection setting knob should be turned clockwise to the maximum value. At this time, when the output voltage exceeds the rated output voltage, it will automatically protect and cut off the high voltage. If voltage regulation protection is required within the rated output voltage range, pleaseNo load boostStep up the voltage to the predetermined protection voltage according to the above steps, and then slowly rotate the overvoltage protection setting knob counterclockwise to the required voltage to perform overvoltage protection action,The "overvoltage" indicator light is on, keep the overvoltage protection setting knob in this position, return the boost knob to the zero position, and turn off the power. If the test sample is connected, the high voltage will be automatically cut off when the voltage exceeds the predetermined level in the future.

4When overvoltage, overcurrent and other faults occur, the high voltage is automatically cut off, the high voltage display green light is off, the buzzer stops sounding, and the corresponding fault indicator light is on, indicating that the test sample has short circuited. To restart, the high voltage input adjustment knob should be returned to the zero position, and the fine adjustment knob should also be in the zero position. Then turn off the power switch, and then turn on the power switch again to cut off the protection and restart the voltage.

When shutting down during normal operation, first turn the high-voltage adjustment knob counterclockwise back to the zero position, then turn the fine adjustment voltage knob back to the zero position, and finally turn off the power switch.

●The power switch is also used to protect the reset switch, so when the fault display light (except for the return to zero display light) is on, the power switch should be turned off and then turned on again to release the protection and re boost the voltage.

5When the load is a high-capacity load, to avoid triggering overcurrent protection due to excessive charging current, please slow down the boosting speed appropriately. After the experiment is completed, turn the output voltage adjustment knob counterclockwise to the zero position. At this time, the voltmeter still displays the voltage value on the test sample. Please wait for the test sample to discharge through the high-voltage tower20KVUse a grounding rod to discharge again to ensure safety.