SF6 density relay calibration device

SF6 density relay calibration device (Winfoss-A21)

Fully automatic, no external loss and emission of SF6 gas in the whole process, healthy and environmentally friendly; equipped with a full set of connectors corresponding to various switches at home and abroad, worry-free!

Overview

SF6 density relay calibration device (Winfoss-A21) is an intelligent and fully automatic SF6 density relay calibration instrument. The instrument adopts single-cycle instruction microcomputer technology, and its running speed is 10 times that of ordinary single-chip microcomputer. It can perform on-site verification of SF6 density relays with pointer contact output and intelligent current output, and use interrupt mode to capture the action of density relays in real time. Therefore, the instrument measurement is more accurate and timely. This instrument is a portable calibration instrument that can standardize the pressure of SF6 gas at any ambient temperature. It can also calibrate SF6 density gauges and pressure gauges.

In a closed container, the pressure of SF6 gas at a certain temperature can represent the density of SF6 gas. It is customary to take the SF6 gas pressure at 20°C as the standard value. During on-site verification, under different ambient temperatures, the measured pressure value should be converted into its corresponding pressure value at 20°C to judge the performance of the SF6 density relay.

The non-emission and environment-friendly SF6 density relay calibration device (Winfoss-A21) can complete the calibration process automatically, without any pollution to the environment, easy to use and accurate in measurement, and the Chinese menu operation is simple and clear.

Application site

A. The relay calibrator uses an analog-digital hybrid single-cycle high-speed microcontroller as the core. It has rich resources and powerful functions and strong data processing capabilities. Because it integrates A/D, D/A, reference voltage, and analog amplification into the microcontroller, Therefore, the peripheral circuit is simple, stable and accurate.
B. The instrument can perform automatic calibration of pointer and electronic density relays.
C. The initial state of 1~3 groups of contacts of the density relay is any form (normally open or normally closed), and the response value and recovery value of 1~3 groups of contacts can be measured at the same time, so this instrument can adapt to all new and old forms of Fully automatic verification of density relays.
D. The instrument adopts 320*240 large-screen color liquid crystal display and Chinese character operation interface, which is simple and convenient to use.
E. During measurement, the instrument simultaneously displays the current pressure, corresponding pressure at 20°C, and ambient temperature, which solves the problem of on-site verification of SF6 density relays.
F. The test process is automatic measurement to avoid errors caused by human factors.
G. The instrument can store 100 sets of measurement data and keep them permanently without loss, so that each measurement has traceability.
H. The instrument can upload the test data to the PC through the RS-232 interface, and automatically generate a special test data table; it can also print the field test data and historical storage data through the built-in micro-printer of the instrument.
I. The instrument can calibrate the normal temperature pressure gauge and density gauge at any ambient temperature.
J. All instrument pipelines adopt imported quick connectors, which are convenient to connect and have low air leakage rate.
K. The instrument has a clock function inside, and the clock can be corrected at any time.
L. The instrument has a self-calibration function. After the instrument has been used for a long time, the instrument can be calibrated and corrected to ensure the calibration accuracy of the instrument.
M. Instruments with high-precision pressure sensors and the world's advanced magnetic fluid technology products.
N. The instrument is equipped with a variety of switch transition joints, and most switches can be calibrated without disassembly.

technical parameter

Calibration principle

The pressure of the gas enclosed in the container changes with the change of temperature. In order to have a unified standard for comparison, we usually take the relative pressure value of 20 °C as the standard value. When the density table is calibrated, it is converted into the equivalent pressure value at 20 ℃ according to the corresponding relationship between pressure and temperature, and then compared.

A. Blocking recovery value verification

When the pointer of the SF6 density relay is zero, inflate the relay slowly and uniformly. When the SF6 density relay issues a latching action, record the pressure value at the ambient temperature at that time, and convert it into the equivalent pressure value at 20°C. This equivalent The pressure value is the latching recovery value of the SF6 density relay.

B. Alarm response value verification:

Inflate the SF6 density relay slowly and uniformly. When the SF6 density relay issues an alarm action, record the pressure value at the ambient temperature at that time, and convert it into an equivalent pressure value at 20°C. This equivalent pressure value is the value of the SF6 density relay. Alarm reply value.

C. Overpressure recovery value verification:

Inflate the SF6 density relay slowly and uniformly. When the SF6 density relay sends an overpressure signal, it starts to slowly and uniformly deflate the SF6 density relay. When the relay overpressure alarm signal is issued, record the pressure value at the ambient temperature at that time, and convert The equivalent pressure value at 20 ℃, this equivalent pressure value is the overpressure recovery value of the SF6 density relay.

D. Alarm value verification:

At ambient temperature, when the pressure value in the SF6 density relay is higher than the alarm response value, it starts to deflate slowly at a constant speed. When the SF6 density relay sends out an alarm signal, record the pressure value at the ambient temperature at that time, and convert it to 20°C, etc. Effective pressure value, this equivalent pressure value is the alarm value of SF6 density relay.

E. Blocking value verification:

Deflate the SF6 density relay slowly and uniformly. When the SF6 density relay sends a blocking signal, record the pressure value at the ambient temperature at that time and convert it into an equivalent pressure value at 20°C. This equivalent pressure value is the SF6 density relay. the blocking value.

F. Overpressure value verification:

Inflate the SF6 density relay slowly and uniformly. When the SF6 density relay sends an overpressure signal, record the pressure value at the ambient temperature at that time and convert it into an equivalent pressure value at 20°C. This equivalent pressure value is the SF6 density relay. the overpressure value.

Service Guarantee

A. Provide on-site training guidance and carry out on-site demonstration operations.

B. Provide detailed Chinese manual and user guidance.

C. One year free warranty, lifetime spare parts support and maintenance.

D. The hotline is 365 days a day to answer users' inquiries.