Thermal resistance temperature transmitter

1 main technical parameters

Input signal: thermal resistance Pt100, Cu50, Cu100, measuring distance 10°C, any temperature range above

Basic error: ±0.5%

Temperature drift: ±0.1%/10°C

Transmission method: two-wire transmission

Power supply: 24V DC ± 2V (or distribution, safety gate power supply)

2 main features edit

Analog Features

● High precision

● Range, zero external continuous adjustable

● Good stability

● Up to 500% positive migration and up to 600% negative migration

● Two-wire system

●Adjustable damping, over pressure resistance

● Solid sensor design

● No mechanical moving parts, less maintenance

● Light weight (2.4kg)

● All series of unified structure, strong interchangeability

● Miniaturization (166mm total height)

● Optional diaphragm material for contact with media

● Unilateral overpressure

● Low pressure cast aluminum alloy housing

Smart features:

●Super measurement performance for pressure, differential pressure, level, flow measurement

●Digital accuracy: +(-)0.05%

● Analog Accuracy: +(-)0.75%+(-)0.1%FS

● Full performance: +(-)0.25FS

● Stability: 0.25% 60 months

● Turndown ratio: 100:1

● Measurement rate: 0.2S

● Miniaturized (2.4kg) stainless steel Flange for easy installation

● The process connection is compatible with other products to achieve the best measurement

● The only sensor (patented technology) using H alloy sheath in the world achieves excellent cold and thermal stability

● Intelligent transmitter with 16-bit computer

Standard 4-20mA with digital signal based on HART protocol, remote control

● Support upgrades to fieldbus and field-based control technology.

3 instrument selection editor

Selection table: No S Code Measurement range ABGAP-2400 0-6～40kPa ABGAP-2500 0-40～250kPa ABGAP-2600 0-0.16～1kPa ABGAP-2700 0-0.4~2.50KPa ABGAP-2800 0-1.6～10Mpa Code Structure Material Flange Fitting Exhaust/Drain Valve Isolation diaphragm Filling Fluid F22 316 Stainless Steel 316 Stainless Steel 316 Stainless Steel Silicone Fluid F23 316 Stainless Steel 316 Stainless Steel Hastelloy C F24 316 Stainless Steel 316 Stainless Steel Monel F25 316 Stainless Steel 316 Stainless Steel F33 Ha Alloy C Hastelloy C Hastelloy C F35 Hastelloy C Hastelloy C F44 Monel Monel Monier Code Option M1 O～1 00% Linear Meter M2 Digital Meter Head M3 LCD Head B1 Tube Mount Bracket B2 Panel Bracket Bracket B3 Tube Mount Bracket D1 Flange Side Exhaust/Drain Valve in Upper D2 Flange Side Exhaust/Drain Valve in Lower E1 Common Cable Connector E2 Explosion-proof Cable Connector G1 Waist Flange G2 welded pipe joint d flameproof i intrinsically safe

4 system composition editing

The structure of the RTD temperature transmitter can be roughly divided into three major parts: input bridge, amplifier circuit and feedback circuit. Its input bridge is essentially an unbalanced bridge. The thermal resistance is connected to one of the bridge arms. When the thermoelectric resistance changes due to a change in temperature, the bridge outputs an unbalanced voltage signal. This voltage signal passes through the amplifying circuit and the feedback circuit to obtain an input signal. The output current I is a linear function.

Thermal resistance temperature transmitter Huai'an Senling

5 thermal resistance editor

(1) Thermal resistance temperature measurement system is generally composed of thermal resistance, connecting wires and display instruments. Must pay attention to the following two points:

1 The thermal resistance and the display meter must have the same index number

2 In order to eliminate the influence of the change in the resistance of the connecting wire, a three-wire system must be used. For details, see Chapter 3 of this essay.

(2) The outer diameter of the sheathed thermal resistance armored thermal resistance is generally φ1 ~ φ8mm, the minimum can reach φmm. Compared with common type thermal resistance, it has the following advantages:

1 Small volume, no internal air gap, thermal inertia, low measurement lag;

2 good mechanical properties, vibration resistance, impact resistance;

3 can bend, easy to install

4 long service life.

(3) End face thermal resistance The end face thermal resistance temperature sensing element is wound by a specially treated resistance wire, and it is closely attached to the end face of the thermometer. Compared with general axial thermal resistance, it can more accurately and quickly reflect the actual temperature of the tested end face, and is suitable for measuring the end face temperature of the bearing pad and other parts.

(4) Flameproof thermal resistance flameproof type thermal resistance through the special structure of the junction box, the explosion of the mixture of gas inside the shell due to sparks or arcs and other shadow resistor body repair must inevitably change the length of the resistance wire and affect the resistance value, For this reason, it is better to replace the new resistor body. If soldering is used for repair, it must be verified after passing the soldering.

6 structural features

(1) Proficient thermal resistance: The structure and characteristics of temperature resistance elements (resistors) commonly used in industry. From the principle of temperature measurement of the thermal resistance, it can be seen that the change in the measured temperature is directly measured by the change of the resistance of the thermal resistor. Therefore, the change in the resistance of the lead wire, such as the thermal resistance body, will affect the temperature measurement. In order to eliminate the influence of the lead resistance, three-wire or four-wire systems are used in the same way.

(2) Armored thermal resistor: The outer diameter of the armored thermal resistor is generally φ2~φ8mm, and the minimum is φmm. Compared with common type thermal resistance, it has the following advantages:

1 Small volume, no internal air gap, thermal inertia, low measurement lag;

2 good mechanical properties, vibration resistance, impact resistance;

3 can bend, easy to install

4 long service life.

(3) End face thermal resistance: The end face thermal resistance temperature sensing element is wound by a specially treated resistance wire and is tightly attached to the end face of the thermometer. Compared with general axial thermal resistance, it can more accurately and quickly reflect the actual temperature of the tested end face, and is suitable for measuring the end face temperature of the bearing pad and other parts.

(4) Flameproof thermal resistance: The flameproof thermal resistance is limited to the junction box through the junction box with special structure, and the explosive mixture gas inside the shell is affected by sparks or arcs. The production site will not be cited. Super explosion. Flameproof RTDs can be used for temperature measurement in explosion-hazardous areas in Bla-B3c zones.

7 Calibration Method Editing

1. Equipment requirements: one calibrator; [1]

2, according to the system connection method wiring;

3, according to the transmitter nameplate marked on the sensor and range, enter the appropriate resistance, so that the output is 1V and 5V (zero potentiometer and full-scale potentiometer can be adjusted respectively);

4. Input each resistance value according to ten divisions of the range, and check whether each temperature output meets the accuracy range;

5, according to the specification of the specification for testing, should meet the technical requirements.