阅读说明：本技术 一种计量装置现场校验仪 (on-spot check gauge of metering device ) 是由 王豫川 朱开云 于 2018-06-05 设计创作，主要内容包括：本发明公开了一种计量装置现场校验仪。一种计量装置现场校验仪,包括机体,所述的机体上设置有输入设备、显示设备、端子区、电流转换开关、附件区、打印设备,内部设置有控制器,所述的输入设备与控制器连接,所述的显示设备与控制器连接,所述的打印设备与控制器连接,所述的控制器由电源供电,所述的电源连接220v市电,所述的端子区包括电流钳和脉冲接口,所述的脉冲接口可安装光电接头或电子表脉冲线接头,所述的端子区还包括火线、零线接口。通过实测电量比对法和标准脉冲法两种方法检测计量装置准确度。本仪器功能齐全、使用方便。解决了现场测量不直观,接线复杂等问题,现场计量表计及回路的精度、内部故障、绕越、变造的迅速准确判定。(The invention discloses a metering device on-site calibration instrument. The utility model provides a metering device on-spot check gauge, includes the organism, the organism on be provided with input device, display device, terminal area, current transfer switch, annex district, printing apparatus, inside is provided with the controller, input device be connected with the controller, display device be connected with the controller, printing apparatus be connected with the controller, the controller by mains operated, the power connect 220v commercial power, terminal area include current clamp and pulse interface, the mountable photoelectricity of pulse interface connect or electronic watch pulse line connects, terminal area still include live wire, zero line interface. The accuracy of the metering device is detected by an actually measured electric quantity comparison method and a standard pulse method. The instrument has complete functions and is convenient to use. The problems of non-visual field measurement, complex wiring and the like are solved, and the precision, internal fault, winding and deformation of a loop are quickly and accurately judged by the field meter.)

1. the utility model provides a metering device on-spot check gauge, includes organism (1), its characterized in that: the machine body (1) is provided with an input device (2), a display device (3), a terminal area (4), a current transfer switch (5), an accessory area (6) and a printing device (7), and a controller is arranged inside the machine body, the input device (2) is connected with the controller, the display device (3) is connected with the controller, the printing equipment (7) is connected with a controller, the controller is powered by a power supply, the power supply is connected with 220v commercial power, the terminal area (4) comprises a current clamp and a pulse interface, the pulse interface can be provided with an optical electric joint or an electronic watch pulse wire joint, the terminal area (4) also comprises a live wire interface and a zero wire interface, the live wire and zero line interfaces are connected with the voltage sampling circuit in parallel, the live wire and the current sampling circuit are connected through a current transformer, the current sampling circuit and the voltage sampling circuit are connected with the controller through the A/D conversion module.

2. The metering device field calibrator of claim 1, wherein: the current change-over switch comprises 0.5, 1A, 1.5A, 2A and 2.5A gears.

3. The metering device field calibrator of claim 1, wherein: and the terminal area is also provided with a USB interface.

4. The metering device field calibrator of claim 1, wherein: the current clamp is a 60A current clamp.

5. The metering device field calibrator of claim 1, wherein: the display equipment is a 3.4-inch LED color display screen.

Technical Field

The invention relates to a calibration instrument, in particular to a metering device on-site calibration instrument.

Background

The metering device on-site calibration instrument is a testing instrument integrating current parameter measurement, metering device calibration and wiring judgment. The instrument is provided with a voltage transformer and a current transformer with high precision and high linearity, so that the measurement precision of the instrument on various parameters is very high, and the instrument is provided with a pincerlike current transformer, so that the field wiring is simple and convenient, and the direct access can be realized without disconnecting a current loop. The existing metering device has the problems of non-visual field measurement of a field calibrator, inaccurate measurement result, complex wiring and the like.

Disclosure of Invention

The invention aims to provide a field calibrator for a metering device, aiming at the defects in the prior art.

the equipment is specially designed for detecting the accuracy of the metering device on line, and the accuracy of the metering device is detected by an actually measured electric quantity comparison method and a standard pulse method. The instrument has the characteristics of complete functions, convenient use, attractive appearance and the like, is an ideal instrument for detecting the metering device on line, and can be used as a special tool for electricity larceny prevention inspection and evidence collection. 1. The detection equipment is different from other detection equipment and has an active detection function, namely, the detection can still be carried out when the user terminal runs in a no-current mode and is in no-load operation. 2. And the characteristic quantity is accurately found, and the working conditions such as faults, abnormity or artificial change and damage of the metering device are met. Through comparison of measured values of voltage, current, power and electric quantity, the method can accurately judge and determine the property by simple operation, and solves the problems of non-intuitionistic field measurement and complex wiring.

The technical scheme is as follows: the utility model provides a metering device on-spot check gauge, includes the organism, its characterized in that: the organism on be provided with input device, display device, terminal area, current transfer switch, annex district, printing apparatus, inside is provided with the controller, input device be connected with the controller, display device be connected with the controller, printing apparatus be connected with the controller, the controller by power supply, the power connect 220v commercial power, terminal area include current clamp and pulse interface, pulse interface mountable photoelectricity connect or electronic watch pulse line connects, terminal area still include live wire, zero line interface.

Further, the current change-over switch comprises 0.5, 1A, 1.5A, 2A and 2.5A gears.

Furthermore, the terminal area is also provided with a USB interface.

Further, the current clamp is a 60A current clamp.

furthermore, the display equipment is a 3.4-inch LED color display screen.

Compared with the prior art, the invention has the following advantages: reasonable design, simple structure, strong interference, rapidness, accuracy, simple and convenient operation and strong practicability.

Drawings

FIG. 1 is an overall external view of the present invention;

FIG. 2 is a circuit connection diagram of the present invention;

FIG. 3 is a connection diagram of the comparison and verification method for the measured electric quantity according to the present invention;

FIG. 4 is a connection diagram of a current clamp calibration through type single phase metering device of the present invention;

FIG. 5 is a connection diagram of the current clamp verification transformer access type metering device of the present invention;

FIG. 6 is a connection diagram of a current clamp calibration through three-phase electric meter according to the present invention;

FIG. 7 is a wiring diagram of the pulse interface of the present invention;

Fig. 8 is a working principle diagram of the present invention.

The printer comprises a main body 1, a main body 2, an input device 3, a display device 4, a terminal area 5, a current selection switch 6, an accessory area 7 and a printing device.

Detailed Description

The utility model provides a metering device on-spot check gauge, includes organism 1, its characterized in that: the machine body 1 is provided with an input device 2, a display device 3, a terminal area 4, a current change-over switch 5, an accessory area 6 and a printing device 7, a controller is arranged inside the machine body, the input device 2 is connected with the controller, the display device 3 is connected with the controller, the printing device 7 is connected with the controller, the controller is powered by a power supply, the power supply is connected with 220v commercial power, the terminal area 4 comprises a current clamp and a pulse interface, the pulse interface can be provided with an optical electric connector or an electronic watch pulse wire connector, the terminal area 4 also comprises a live wire interface and a zero wire interface, the live wire and zero line interfaces are connected with the voltage sampling circuit in parallel, the live wire and the current sampling circuit are connected through a current transformer, the current sampling circuit and the voltage sampling circuit are connected with the controller through the A/D conversion module; the current change-over switch 5 comprises 0.5, 1A, 1.5A, 2A and 2.5A gears; the terminal area is also provided with a USB interface; the current clamp is a 60A current clamp; the display device 3 is a 3.4-inch LED color display screen.

Referring to FIG. 3, the measured power comparison and calibration method (applicable to the no-current state of the electric meter)

Respectively inserting the connection rods of a live wire (red) and a zero wire (black) of a voltage wire into a voltage L red port and a black N port of a field calibrator of the metering device; the other end of the red wire clamp is connected to the outlet end of the single-phase metering device, and the black zero line is connected to the zero line end of the electric meter. The through three-phase metering device is respectively connected with current outlet terminals a, b, c and N, and a lower end switch is selected.

Referring to fig. 4, the current clamp checks the single-phase metering device of the through type (suitable for the ammeter with current state)

Respectively inserting the connection rods of a live voltage wire (red) and a zero line (black) into a red port L and a black port N of a voltage input socket of a field calibrator of the metering device; the red wire clamp at the other end is connected with a live wire outlet terminal of the electric meter (namely a terminal II of the electric meter), and the black zero line is connected with a zero line end of the electric meter (namely a terminal III or IV of the electric meter); the current clamp plug is inserted into the corresponding clamp meter jack of the instrument, and the other end of the clamp meter is clamped into the primary current of the line.

Referring to fig. 5, the current clamp checks the mutual inductor to insert the metering device

Respectively inserting the connection rods of the live line (red) and the zero line (black) of the voltage into a red port U and a black port N of a voltage input socket of a field calibrator of the metering device; the red wire clamp at the other end is respectively connected with live wire voltage incoming terminals (a, b and c) of the electric meter, and the black zero line is connected with the zero line end (N) of the electric meter; and inserting a current clamp plug into a corresponding clamp meter jack of the instrument, and clamping the other end of the clamp meter into a current output end of the ammeter or a secondary side of a line current transformer, wherein the current direction (the polarity is consistent with the polarity of the current clamp).

Referring to fig. 6, the current clamp checks the through three-phase electric meter

Respectively inserting the connection rods of the live line and the zero line into a red port L and a black port N of a voltage input socket of a field calibrator of the metering device; the other end of the red wire is connected with a live wire outlet terminal (namely the electric meters a, b and c) of the electric meter, and the black zero wire is connected with a zero wire end (namely the electric meter N) of the electric meter; and inserting the current clamp plug into the corresponding clamp meter jack of the instrument, and clamping the other end of the clamp meter into the outgoing line side of the ammeter.

the instrument working power supply directly supplies power to the alternating current measuring terminal and supplies power to the battery.

The field measurement terminal is directly powered (AC 85V-400V, 50 Hz), and the instrument is directly started to enter a working state after the measurement terminal of the instrument is connected with a voltage signal.

Power supply of a lithium battery: the 4000mAh lithium battery is arranged in the instrument, and the battery can continuously work for 8 hours when supplying power under the condition of no external power supply. When the battery is charged, the two power lines are connected to the L/N voltage port of the instrument, the other end of the instrument is connected to the commercial power socket, the instrument is automatically started to charge the battery (the screen can be closed by pressing the star key), and the battery capacity simulation strip displays IIIII and is fully charged when the battery capacity simulation strip does not flicker. The instrument detects that the character is not lost for 60 seconds in the charging state, the backlight is closed in no key operation, and the backlight can be awakened to be turned on (except a switch machine key and an M key) in the other key operation.

The printer working power supply: the printer can work when the PT terminal of the instrument is in a working state or two mains supply power lines are connected into an L/N voltage port of the instrument.

When the battery supplies power, after the instrument is started up through the on-off key of the instrument, the relevant interface can be checked, the work of load output, printing and the like can not be carried out under the current-free working mode, the current clamp can be used for measuring current signals, and the current data of the incoming and outgoing lines of the ammeter can be measured. If no key operation is carried out within 2 minutes, the system is automatically shut down.

and in a no-current working mode, an L/N field voltage signal is required to be accessed.

When the L/N or the commercial power is accessed, if the load is not started, the system is automatically shut down after the external power supply is disconnected.

Working time electric fan locking working time (Battery power supply)

0-2 min and 0 min

2-4 minutes and 2 minutes

4-6 min and 3 min

6-8 minutes and 4 minutes

8-10 min and 5 min

the fan is pressed for more than 10 seconds during the locking working time, and when the buzzer continuously gives an alarm, the switch key is released, so that the fan can be forcibly turned off.

The printer can work when the L/N or the commercial power is accessed.

pulse sampling wiring description

There are two ways to sample the pulses: photoelectric sampling and pulse terminal sampling

For the rotating disc type metering device, because the rotating disc type metering device is not provided with an electric energy pulse output terminal, the rotating turns of the rotating disc of the metering device can be converted into pulse signals by using a photoelectric sampler, and the method specifically comprises the following steps:

Firstly, inserting a plug of a photoelectric sampler into an electric energy pulse input socket of an instrument;

Absorbing the photoelectric sampler on the metering device, adjusting the lighting distance to an effective range, illuminating three red lighting lamps of the photoelectric sampler at the central position of a turntable of the metering device, and indicating that a pulse is correctly collected to the light each time a signal indicator lamp flickers when black marks on the turntable of the metering device pass through the central position of an ammeter. If no flicker exists, the lighting angle or lighting distance of the photoelectric head can be adjusted. The adjusting button can adjust the intensity of the light source signal to improve the sampling sensitivity.

The photoelectric sampling modes are 2 in total, and are switched by a switching button:

Mechanical watch mode: the mode that three red lamps on the back of the photoelectric sampler are turned on is a mechanical rotating disc type collection electric meter mode;

Electronic watch mode: three red light extinguishes on the back of the photoelectric sampler to be in a collection electronic ammeter mode;

pulse input line (check electronic type electric meter)

The yellow pulse input and the black GND of the pulse input line can clamp the high end and the low end of the electronic watch pulse output respectively; the other end of the pulse input line is connected to the six-core socket of the instrument.

Note that the pulse signal power supply is a 5V signal, and the signal above the voltage terminal 5V is strictly forbidden, otherwise the instrument is damaged, and attention is paid to wiring.

When the on-site measurement is carried out, particularly when the measured current is very small, the device is far away from other current-carrying conductors and magnetic field interference sources except the measured lead, such as a power transformer and the like;

When the current clamp meter is used for sampling, the current direction is ensured to be correct, namely the current direction flows in from the color mark side "+" and flows out from the gray mark end "-".

The check gauge can send standard pulse signal, when this instrument is examined in the measurement, inserts the instrument pulse socket with the pulse output line, goes out the green pulse of other end and black GND alligator clip connects to the pulse input terminal of standard table, and red VCC is reserve +5V power.

The calibrator can send an electric energy pulse signal to the standard meter after being connected with a voltage and current clamp signal in a current working mode.

The instrument is full-automatic measurement, and can set parameters and directly read various electric quantity parameters without conversion after being connected with voltage, current and pulse signals.

the embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.