WTYY-1021 remote pressure thermometer

WTYY-1021 remote pressure thermometerSpecifications and Parameters
1. Basic technical parameters
Environmental temperature: -10~+55 ℃ Relative humidity: 5~95% Index accuracy: Class 1.5 Time constant: 9 seconds (34 seconds when wrapped in polytetrafluoroethylene) Thermal resistance scale: Pt100 or Cu50 Thermal resistance accuracy class: ZBY 301-85 Class B Thermal resistance Thermal response time: τ 0.5=35 seconds (45 seconds when wrapped in polytetrafluoroethylene)
2. Instrument range

WTYY-1021 remote pressure thermometerModel List

(1). working principle

The WTYX type electrical connector thermometer is equipped with a contact device on the WTY type thermometer, and the position of the set pointer can be easily changed by adjusting the mechanism. When the measured temperature rises (or falls) to the set point, the thermometer will give an on or off signal to control, regulate or alarm the measured temperature.

(2). Contact form and electrical parameters

The setting methods are divided into internal setting and external setting. For internal setting, open the instrument cover and use an insulated tool (cut off the power) to move the setting pointer to the desired position. For external setting, unscrew the center nut of the meter, press it inward with a screwdriver, and rotate the lever mechanism to move the setting pointer to the desired position.

(3). Characteristics and wiring methods of contact switches

WTYY-1 □□□ - B liquid pressure intrinsic safety explosion-proof thermal resistance remote thermometer

(1). Working principle of thermometer

When the WTYY-1 □□□ liquid pressure thermal resistance remote transmission thermometer is used in explosive environments, it can be connected to the related equipment's Zener safety barrier and wires (or cables) to form an intrinsic safety system, thereby forming the liquid pressure intrinsic safety explosion-proof thermal resistance remote transmission thermometer - WTYY-1 □□□ - B. The intrinsic safety explosion-proof system has the highest explosion-proof level and can be applied to environments with hydrogen and acetylene. The product performance complies with GB3836.1-88 and GB3836.4-88 standards, and the explosion-proof mark is iaIICT1~T6.

(2). Intrinsic safety explosion-proof electrical parameters

(3). system connection
①. The installation and use of intrinsic safety thermometers should comply with the relevant provisions of the "Electrical Safety Regulations for Explosive Hazardous Areas of the People's Republic of China"
②. Before installation, it is necessary to check whether the explosion-proof mark on the nameplate matches the usage environment. If it does not match, a new intrinsic safety thermometer should be replaced.
③. Copper three core shielded cables should be used for connecting wires, with a core wire cross-sectional area greater than 0.5 square millimeters, and distributed capacitance and inductance not exceeding the specified values of electrical parameters.
④. According to the installation requirements of WTY-1 □□□ thermometer, install the temperature and at the location being measured.
6. WTYY-1 □□□ Explosion proof thermal resistance remote thermometer
When the WTYY-1 □□□ thermal resistance remote thermometer is used in explosive environments other than acetylene and hydrogen, an explosion-proof liquid pressure thermometer, WTY □□□□ - d, can be used. Its junction box is designed with a special structure that can withstand the explosive pressure of internal explosive gas mixtures, prevent internal explosions from propagating to the surrounding explosive mixture, and has sufficient mechanical strength and explosion-proof ability. The product performance complies with GB3836.1-88 and GB3836.2-88 standards, with explosion-proof markings dIIBT-T6.
7. WTYS-1 □□□ Liquid pressure thermistor temperature transmitter
(1). working principle
The WTYY series electromechanical integrated temperature transmitter converts the platinum resistance signal of the WTYY remote thermometer into a standard current signal of 4-20mA or 0-10mA. The temperature transmitter adopts * integrated circuit and overall packaging technology, which has the advantages of anti vibration, corrosion resistance, good interchangeability, strong load capacity and resistance, and can be used for on-site temperature indication and long-distance signal transmission. The product belongs to domestic *, and the corresponding technical indicators have reached the relevant professional standards.
(2). technical indicators
①. Input method: Thermal resistance sensor (Pt100)
②. Output mode: 2-wire 4-20mA 3-wire 0-10mA
③. Power supply: 24V DC. When the load is 0, the allowable range of the power supply is 19-30V DC; When the load is 250 Ω, the allowable range of the power supply is 15-35V DC; When the power supply voltage changes from 24V DC to+11V and -9, the transmitter output value changes by less than or equal to 0.1% of the range
④. Basic error (% of range) 0.5 level
⑤. Working environment temperature: -20~80 ℃
Selection precautions
When the upper limit of the instrument range is greater than or equal to 300 ℃, the installation thread is made of stainless steel material, and the thread is installed to the meter head size h=100 millimeters; When the upper limit of the instrument range is less than 300 ℃, the installation thread is made of H62 brass with h=60mm.
If the measuring element is wrapped in a PTFE sleeve (i.e. anti-corrosion type), it is not suitable to use a sleeve thread, and the temperature of the measured medium should not exceed 250 ℃.
When using sleeve threads, it is convenient to adjust the depth of the temperature measuring element, but the dimensions mentioned in the previous table must be ensured. If the pressure of the measured medium is greater than 2.5 MPa, sleeve threads should not be used.
If the measured medium is high pressure (such as greater than 6.4MPa), the medium may cause impact fatigue and other loads on the temperature measuring element, which may cause the temperature measuring element to break, or the thermometer needs to be stopped for replacement, a protective sleeve should be installed at the temperature measuring location. The thermometer with protective sleeve should be labeled with the words' with sleeve 'in the tail length marking or additional instructions.
5. For remote transmission and explosion-proof thermometers (i.e. those that directly use platinum resistance signals), when the actual insertion depth of the side temperature element is between (0.75-1) Lmin, the platinum resistance error is level 1.5. When the actual insertion depth is greater than or equal to Lmin, the platinum resistance error is level B as specified in ZB 301-85.
6. There are two types of output devices for instruments such as remote transmission, electrical connectors, and temperature transmitters: aviation plugs and junction boxes. The output methods for explosion-proof thermometers include direct output and steel pipe wiring, both of which need to be specified in the additional instructions (the thread size should be indicated for steel pipe wiring).
7. For instruments such as remote transmission, explosion-proof, and temperature transmitters, our factory can purchase matching secondary instruments on behalf of customers, and also undertake the design, processing, and debugging of instrument control consoles for users.
8. Within twelve months from the date of manufacture, the instrument can be recalibrated for users free of charge.
9. Temperature instruments with special specifications can be produced according to the diagram or sample.