Product introduction

The grounding resistance tester is used to measure the grounding resistance inside the electrical equipment, which reflects the electrical resistance between the exposed conductive parts and the

The (contact) resistance between the main grounding terminals of the gas equipment. To eliminate the influence of the contact resistance on the test, the grounding resistance tester adopts the 4-terminal measurement method, namely

Apply a current (generally about 25A) between the exposed conductive part of the tested electrical appliance and the general grounding terminal, and then measure the voltage at these two ends to calculate

Its resistance value. DY2678 series grounding resistance tester is based on GB, IEC, ISO, BS, UL, JIS and other international and domestic safety standards

The designed grounding resistance index is one of the important indexes to measure the safety performance of various electrical equipment. It is at high current (10A, 25A or 70A)

The resistance of the grounding circuit is measured under the condition of, and it is also a test of the resistance of the grounding circuit to withstand the high current, so as to avoid the deterioration (or damage) of the insulation

Personal injury when This tester is developed and produced to meet the above requirements and provide high-performance testing instruments for production workshops and experimental departments

It has low requirements for power supply voltage, high measurement accuracy, fast speed and convenient use, especially suitable for laboratories with high requirements and automatic detection lines

The alarm function (i.e. open circuit alarm) can easily know whether the instrument is working in the normal test state, and the user can choose whether to do so according to actual needs

This function. The instrument adopts 3 1/2 digit digital display, which is convenient for reading. With optimized design, the whole machine has high reliability and stability. This test

The instrument is suitable for different national standards: for example, it complies with the relevant provisions of the general requirements in the safety standards of household and similar electrical appliances (GB4706.1-1998).

Function introduction

1. Open circuit alarm

This instrument can detect the open circuit of the tested object's grounding circuit, or the test clip is not connected to the instrument or the test clip is not clamped to the tested object, which can be determined according to the actual situation

It is necessary to select whether to send out audible and visual alarm

2. Overcurrent alarm

The instrument has over-current alarm function. When the loop current exceeds 32.5A (32A model), 72A (70A model), the instrument will send out over-current alarm

The current audible and visual alarm, the over-current light is on continuously, the buzzer sounds continuously, press the "reset" button, the alarm status can be canceled, and“

Turn down the "current adjustment" knob counterclockwise for the next measurement.

3. The resistance alarm value is adjustable between 0~600m Ω

When the 200m Ω/600m Ω gear pops up after pressing the preset key, the preset value can be set at 0~210.0m Ω; When 200m Ω/600m Ω is pressed

The preset value can be set at 0~610m Ω.

4. Test time is arbitrarily set at 0~999S

Users can set the test time according to their own needs.

5. Continuous test function

When the setting time is zero, the tester can test continuously.

6. It is not necessary to set the alarm value with current output

The instrument does not need to preset the alarm value when there is current output. It can be set arbitrarily in case of open circuit.

7. External control

This machine is equipped with "PLC" interface, which can form a pipeline test system with PLC. (Optional)