Instrument Characteristics

1. High test accuracy: the core components adopt imported devices, with high integration, high precision and good repeatability

High reliability. Because it adopts high-speed sampling A/D, not only the density relay with a conventional action value can be measured, but also a density relay with a particularly small action value.

2. Highly intelligent: the calibration process does not require a constant temperature chamber, and SF 6 gas can be controlled in any effective temperature range Density relay, pressure gauge for calibration. Using the dynamic compensation algorithm of pressure and temperature, the pressure and the equivalent pressure value of 20°C are automatically converted, and the pressure at the current temperature and the equivalent pressure at 20°C are displayed, which completely solves the problem of on-site verification of SF 6 gas density relay.

3. Powerful:

(1) It can measure density relays of different pressure types, and density relays of relative pressure and absolute pressure can be measured.

(2) The initial state of the 1-3 sets of contacts of the density relay is in any form (normally open or normally closed), and the uplink and downlink values of the 1-3 sets of contacts can be measured simultaneously, such as alarm, lockout, overvoltage, etc. Therefore, this instrument can adapt to the full automatic calibration of all new and old density relays.

(3)The measurement displays the current pressure and ambient temperature simultaneously, solving the problem of on-site calibration of density relays.

4. Friendly man-machine interface: equipped with 7-inch high-definition full-color touch screen, simple operation, beautiful interface, all parameters and status at a glance.

5. Supporting transition joints: This product is a portable instrument, equipped with a variety of types of transition connectors, most models of switching density relays can be verified on site without disassembly, which is the best choice for SF₆ density relay calibration.

6. Less air consumption: the gas consumption during the calibration process is very small, no waste of SF₆ gas, low test cost, no pollution.

7. Support data storage: the instrument has a built-in large-capacity memory, which saves test results immediately and has power-down data Save function, query and print historical test data at any time.

8. Support printing: All relevant test results can be printed immediately after the test is completed, and the historical data can also be printed for analysis.

9. U disk transfer: support U disk transfer historical test data, through the supporting host computer software to read, easy and fast operation.

10. Easy to carry: the instrument is powered by a large-capacity lithium battery, no need to connect to alternating current, which solves the problem of difficulty in obtaining electricity outdoors, and after the instrument is fully charged, it can work for a long time, and it can also be plugged into the charger at the same time to work.

11. Powerful PC software: The supporting PC host computer application software has powerful functions and simple operation, and realizes data display, word format saving, printing and generating complete test reports, which is convenient for centralized data management.

12. Chinese and English switching: Customers can switch between Chinese and English in the main interface of the instrument, which can meet the needs of different customer groups, and accept customization in other languages.

Parameter Introduction

1.Pt: The actual pressure value measured at the current ambient temperature at the time of the test.

2.P20: The actual pressure value measured at the current ambient temperature at the time of the test is converted to the equivalent pressure value of 20°C.

3. Relative pressure: Relative pressure is the pressure expressed by atmospheric pressure as a benchmark, which is a method of expressing pressure. Since the pressure measured by most load measuring instruments is relative pressure, the relative pressure, also known as gauge pressure, refers to the difference between the real pressure and atmospheric pressure somewhere inside the equipment.

4. Absolute pressure: It is a pressure expressed by using absolute vacuum as a benchmark, called absolute pressure, absolute pressure = relative pressure (gauge pressure) + atmospheric pressure (about 0.1MPa).

5. Contact count: indicates the total number of contacts of the density relay to be measured, and the corresponding selection should be made according to the actual number of contact groups of the density relay.

Single contact: When a single contact is selected, a set of test signals is received, and the system only measures the action value P1 of one set of contacts.

Double contact: When the double contact is selected, two sets of test signals are connected, and the system measures the action values P1 and P2 of the two sets of contacts.

Three contacts: When three contacts are selected, three sets of test signals are connected, and the system measures the action values P1, P2 and P3 of three sets of contacts at the same time.

6. Uplink value: at ambient temperature, when the SF 6 density relay is zero pressure, inflate the SF 6 density relay slowly at a certain speed, and record the pressure value at the current ambient temperature when the contact of the SF₆ density relay sends an action signal, It is converted to the equivalent pressure value at 20°C, which is the upward value of the SF 6 density relay.

7. Downward value: at ambient temperature, when the pressure in the SF 6 density relay is greater than the upper limit pressure value, slowly deflate at a certain speed, when the contact of the SF₆ density relay sends an action signal, record the pressure value at the current ambient temperature, and convert it to the equivalent pressure value at 20 °C, This equivalent pressure value at 20°C is the downlink value of the SF 6 density relay.

 Technical Parameters