ZGF-II digital microampere meter

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1ZGF-IIOverview of digital microampere meter

The multi-purpose impact resistant digital microampere meter developed by our factory is mainly used to measure the leakage current or conductivity current value of the test object in high-voltage electrical tests.

Multi purpose impact resistant digital microampere meter is a product of the successful combination of high voltage technology and high-tech digital instruments.

Due to the use of internal and external shielding measures, the instrument can still measure accurately and stably under high voltages of several hundred kilovolts.

The instrument is designed with multi-level protection circuits against overvoltage and overcurrent surges, and uses components with special functions. When the test sample breaks down, the high-voltage lead falls off, or there is an operational error, it can cause a surge of high voltage and a surge current of several hundred microseconds or nearly ten thousand amperes to flow through the meter at both input terminals, causing discharge without damaging the integrity of the meter.

This instrument has the advantages of high precision, wide range, small size, light weight, low power consumption, shock resistance, reasonable design, exquisite production, and can read clearly from several meters away. Not only can it be used for measuring leakage current of transformers, power cables, high-voltage switches, etc. under high voltage, but it can also replace the 0.5 level magneto electric DC microampere meter for measuring the conductivity current of various types of lightning arresters at different voltage levels. After several years of on-site testing, it has been proven that the technical indicators are excellent and meet the needs of special on-site testing.

IIZGF-IITechnical indicators of digital microampere meter

1. Range and resolution:

2000 μ A range: 0-1999 μ A resolution: 1 μ A

2. Accuracy level: 0.5 level (measured up to 0.2 level)

3. Realistic function: It has automatic display functions for current polarity, over limit, and battery undervoltage.

4. Power supply: One 6F22 9V laminated battery, normal operating voltage 7-10V, DKSB-3 consumes 0.1mA and can work for 1500 hours with intermittent use.

5. Volume and weight:

Volume: Length x Width x Height: 76 x 46 x 58mm3

Weight: 250g

3、 Structural characteristics

The instrument housing is made of finely processed aluminum alloy profiles and plates with surface oxidation treatment, with good smoothness and exquisite appearance. There are two ф 4mm sockets on the upper cover of the instrument, which are the positive and negative input terminals. The positive stage is insulated from the housing, and the negative electrode is connected to the housing. The small screws on both sides of the socket are used to tighten the internal components and provide electrical connectivity. Users should not turn them to avoid damaging the instrument.

There are four screw caps on the front of the instrument, which are used to install and fix the organic glass protective plate and digital meter head. Users are not allowed to turn these four screws to prevent damage to the instrument.

Product Features

a) Small in size, lightweight, more aesthetically pleasing, reliable, easy to operate, and fully functional, it is an ideal replacement product for the new century.

b) By adopting technology and process manufacturing, pulse train logic array modulation, high-power IGBT devices, and phase fuzzy control, the output stability is higher and the wave coefficient is smaller.

c) High precision and accurate measurement. The output voltage regulation adopts a single multi turn potentiometer, which ensures a smooth boosting process, high adjustment accuracy, and has coarse and fine adjustment functions. The instrument has high and low voltage ends for measuring leakage current, and the high voltage end is displayed with a spherical shielded digital meter, which is not afraid of discharge impact and has good anti-interference performance, suitable for on-site use.

d) The voltmeter on the control box directly displays the voltage value applied to the load test sample, without the need for an external voltage divider or current limiting resistor during use. The wiring is simple and the operation is convenient.

e) Negative polarity output, zero start, continuously adjustable, with various protection functions such as overvoltage, overcurrent, return to zero, grounding protection, and disconnection protection. Strong automatic protection function, safe operation, various technical indicators are superior to industry standards and superior to similar products.

f) With 75% functionality, measuring zinc oxide lightning arresters brings great convenience. There are 75% voltage switch function keys on the control box of this instrument. When the current rises to 1000uA, the 75% button is turned on. At this time, the values displayed on the voltmeter and ammeter are the 75% data. After completion, the boost knob should be immediately returned to the zero position, and the fine adjustment voltage knob should be returned to the zero position. The 75% button switch should be immediately turned to the normal position before conducting other tests.