GC-DL-921 DC High-precision Ammeter is a high-precision micro-current detector for detecting very weak small current signals. Generally, the existing micro-ampere and higher ammeters use sampling resistor for sampling and voltage amplification to obtain the data required. Since the impedance of the sampling resistor is directly incorporated into the circuit under test, the impedance of the current source under test shall be large enough to ignore the error caused by the impedance of the sampling resistor. And, the large resistance in series in the circuit under test itself violates the current measurement rule, and the safety under large impedance (generally high voltage) may not be guaranteed. Therefore, bridge measurement method can be used in weaker nA and fA, but the original intention of this method is the same as the sampling resistance method.

Guochuang micro-magnetic basic sensor features high magnetic field detection, it can even directly detect the weak magnetic field intensity signal generated by current, by which we can calculate the strength of the current signal that produces the field intensity. The advantages of this kind of detection equipment are incomparable to the existing technology. Based on the principle of induction (through magnetic field), it applies to all occasions where the amperage needs to be measured. Since the circuit under test is isolated from the test circuit (by the magnetic field), its safety can be effectively guaranteed and since the input impedance is small (less than 300 ohms), it has almost negligible influence on the circuit under test; it features high measurement precision and good linearity.

Performance Parameters (DC)

01) Range: 5nA-5uA；5uA-5mA；5mA-1500mA (three gears);

02) Highest resolution: 5nA;

03) Data refresh rate: 1s;

04) Resistance: DC 80 Ω;

05) Voltage-resisting value: 2500V;

06) Precision: ≤0.1;

07) External magnetic suppression: 60db;

08) Battery power supply: 12V, 2,000mAh;

09) Continuous working time: 8h;

10) Touch screen: 4.3";

11) Operating temperature: -10℃ ~ +50℃;

12) Overall size: 28.5×25×12.5cm;

13) Mass: 3.795kg;

GC-DL-921 High-precision Ammeter is suitable for the inspection of resistance of anti-static products such as anti-static shoes and anti-static plastic rubber products, and anti-static movable floor in computer room and insulation resistance measurement and insulation monitoring of electronic and electrical products. The product can be used for tests of manufacturing components, dual diodes, semiconductor devices and multi-pin devices, ion beam monitoring, research of electron microscopy and cosmic ray, and measurement of leakage current and bioelectric current.

It can be used in materials science (including biomaterials, ceramics, rubber, films, dielectric materials, electrochemical materials, ferroelectric materials, grapheme, metals, organic materials, nanomaterials, polymers and semiconductors, etc.);

electronic components (including capacitors, resistors, diodes, sensors, TFT, CNT and other types of transistors, optoelectronic devices and solar cells, etc.);

and electronic/non-electronic systems (including ion beam, electron beam, sensing systems, particle measurement and embedded precision instruments, etc.).