CN204989365U - Portable circuit detection device - Google Patents

Abstract

Portable circuit detection device, including DC power supply, switch, change over switch, constant current source chip, regulation potentiometer, display chip, two piece positive and negative detection pointers, two piece positive and negative detection pointers are established ties in DC power supply, switch, change over switch's first gear conductive path, and display chip connects in parallel in DC power supply and switch, change over switch's second shelves are then switch into the conductive path output connection regulation potentiometer of parallelly connected constant current source chip IC, constant current source chip. Change over switch's first gear conductive path is equipped with the buzzer. The line concentration sweetgum fruit detects absolutely, analog signal sets for function in an organic wholes such as regulation, and lightly small and exquisite, the convenient to use personnel carry, use in the scene.

Description

Portable circuit testing device

technical field

The utility model relates to a circuit detector, which can be widely used in chemical industry, electric power, nuclear energy, steel and other fields, and meets the needs of inspection, testing and debugging of electrical and control circuits in the chemical industry, electric power, nuclear energy, steel installation and production process.

Background technique

The circuit tester can be widely used in chemical industry, electric power, nuclear energy, steel and other fields to meet the needs of inspection, testing and debugging of electrical and control circuits in the chemical industry, electric power, nuclear energy, steel installation and production process. The main body of the circuit tester is easy to operate, clear and intuitive, small and light, and convenient for on-site use.

In nuclear power plants, thermal power plants, chemical plants, building electrical and other fields, the connection lines need to be inspected and debugged during the entire production, installation, commissioning and use of electrical and control systems.

The commonly used circuit detection and signal conditioning instruments in the past are expensive, bulky, difficult to supply power from an external power supply, and have complicated functions and are not practical. In order to be more efficient and use to meet the functional requirements of each link and simplify the working steps of the testing personnel, the circuit tester came into being.

Utility model content

The purpose of the utility model is to provide a portable circuit detection device, which integrates functions such as circuit on-off detection, analog signal setting and adjustment, is light and compact, and is convenient for users to carry and use on site.

The technical solution of the utility model is: a portable circuit detection device, including a DC power supply, a power switch, a switch, a constant current source chip, an adjustment potentiometer, a display chip, two positive and negative detection pointers, and the positive and negative two detection pointers are connected in series The display chip is connected in parallel with the DC power supply, power switch, and the first gear of the switch; while the second gear of the switch switches the conductive path into a parallel constant current source chip IC, the constant current source The output of the chip is connected to the adjustment potentiometer.

Further, a buzzer is provided on the first gear conductive path of the changeover switch.

The utility model is compact and light in shape and has wide application range. The power consumption of the circuit tester is extremely small, powered by batteries, safe to use, energy-saving and durable. When testing electrical and control loops and debugging the analog output (4-20mA) signal of the constant current source chip, you can select the line continuity check and analog signal setting debugging mode according to the requirements of the tested loop to meet different electrical, Control equipment inspection and debugging requirements. The circuit tester is equipped with industrial-grade display instruments to ensure that the controller has extremely high anti-interference ability and stability. At the same time, the circuit tester is equipped with a buzzer, which can provide sound and light prompts to the tested circuit at the same time.

Small and light in appearance, easy to carry. The power consumption is extremely small, and it is safe to use. There are 4 1.5V batteries inside the circuit tester, which can be used without external power supply, and the replacement of general-purpose batteries is more convenient.

The circuit tester can detect the continuity of the circuit. The tester has a built-in buzzer and a digital display. When the circuit is connected, the buzzer sounds and the digital display shows "0".

The circuit tester can send 0~100mA signal, can set the signal of the two-wire analog signal instrument, and can realize the frequency adjustment of the frequency converter. Portable circuit detection device, which integrates circuit on-off detection and analog signal setting adjustment.

Beneficial effects of the utility model: the portable circuit detection device (hereinafter referred to as "circuit tester") is a high-performance general-purpose tester aimed at the on-off inspection of electrical circuit lines and the setting and debugging of analog signals. It's small and light enough to be easily carried around. The built-in buzzer and digital display meter can detect the continuity of the line. When the line is connected, the buzzer sounds and the digital display shows "0". In the process of production, installation, commissioning, and use in various fields, the circuit tester can be used to check the continuity of the electrical and control lines, and adjust the analog signal. It overcomes the deficiencies of traditional equipment such as few functions, large size, inconvenient portability and use, and requires an external power supply when using it, and achieves the goals of safety, convenience, multi-function and low maintenance. It can send 0~100mA signal, and can debug frequency converter or analog signal instrument. Built-in 5V battery power supply, easy to replace, safe to use, energy-saving and durable.

Description of drawings

Fig. 1 is a schematic diagram of the appearance structure of the utility model.

Figure 2 is a block diagram of the electrical control.

Analog signal digital display meter 1; power switch 2; line on-off detection/analog signal adjustment switch 3; analog signal setting knob 4.

detailed description

Below in conjunction with accompanying drawing and example the utility model is described further:

1. Technical indicators

Signal adjustment range: 0 ~ 100mA

The resolution is 0.1°C

Size: 100×68×50mm

Working environment: -20℃～+70℃

Display mode: 4 digits 0.52 inch LED

Working power supply: DC6V

Power Consumption: 1.5W

2. Characteristics

Small and lightweight, it can be easily carried.

The built-in buzzer and digital display meter can detect the continuity of the line.

It can send 0~100mA signal, and can debug frequency converter or analog signal instrument.

Built-in 5V battery power supply, easy to replace, safe to use, energy-saving and durable.

3. Operation method

On-off detection: The switch "K1" is turned up to the "power" position, the circuit tester is powered on, and the LED digital display lights up, indicating that the tester is in the power-on state. When used for on-off detection, turn the switch "K2" up to the "on-off" position, and the test lead wires are not divided into positive and negative poles. Connect the two test lead wires to both ends of the circuit to be tested at the same time. If the resistance between the two ends of the tested circuit is less than 25Ω, the buzzer of the circuit tester will continue to sound, and the digital display shows "0". If the line is out of the loop, the buzzer will stop. Conversely, if there is an open circuit between the two ends of the tested line, the buzzer will not sound. After the test is completed, switch the switch "2" to the reverse position of "power" to turn off the circuit tester.

Signal adjustment: switch "K1" to the "power" position, the circuit tester is powered on, and the LED digital display is on, indicating that the tester is in a power-on state. When used for signal adjustment, turn the switch "K2" down to the "on-off" reverse position, the red line of the test lead is the positive pole, and the blue line is the negative pole. Short-circuit the two test lead wires first, and the display, that is, the LED digital display meter, will display the current value, and the unit is "mA". Turn the analog signal setting knob "R" to adjust the current value to about 10mA. Connect the two test lead wires to both ends of the inverter frequency adjustment signal or the analog meter adjustment signal at the same time, the red test lead I1 wire is connected to the positive pole of the signal to be adjusted, and the blue test pen I2 wire is connected to the negative pole of the signal to be adjusted. Turn the analog signal setting knob "R", turn it to the left, the adjustment signal decreases, and the value of the LED digital display meter 1 decreases; turn it to the right, the adjustment signal increases, and the value of the LED digital display meter increases. After the test is completed, turn the switch "K1" down to the reverse position of "power" and turn off the circuit tester.

Claims (3)

1. portable circuit checker, it is characterized in that comprising direct supply, power switch, change-over switch, constant current source chip, adjustment pot, display chip, positive and negative two detection pointers, positive and negative two are detected first grade of conductive path that pointer is series at direct supply, power switch, change-over switch, and display chip is parallel to direct supply and power switch; Conductive path is then switched to constant current source chip in parallel by the second gear of change-over switch, and the output of constant current source chip connects adjustment pot.

2. portable circuit checker according to claim 1, is characterized in that first grade of conductive path of change-over switch is provided with hummer.

3. portable circuit checker according to claim 1, is characterized in that direct supply is 4 joint 1.5V batteries.