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Working principle/working principle-----------------------------------------------------------◆◆
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| The process pressure is converted into an electrical signal by a pressure sensor, amplified by a differential amplifier and an output amplifier, and then converted into a 4-20mA standard current output signal linearly corresponding to the input liquid level through a V/A converter, which is converted into the magnitude of the pressure. |
Structural composition/Structural components-----------------------------------------------------◆◆
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1 |
Front cover of header |
5 |
housing |
9 |
Diffused silicon sensor |
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2 |
heading |
6 |
connecting terminal |
10 |
Pressure Cap |
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3 |
Metal cover |
7 |
Header back cover |
11 |
Locking screw |
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4 |
Nameplate label |
8 |
Sensor transition parts |
12 |
Explosion proof joint |
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Product Features/Product features------------------------------------------------------------◆◆
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| 1. High accuracy and good stability. In addition to the imported original sensors that have been laser corrected, the comprehensive temperature drift and nonlinearity of the entire machine within the operating temperature range are finely compensated, resulting in low nonlinearity and good temperature stability within the operating temperature range. |
| 2. Reliable mechanical protection IP65 and explosion-proof protection ia Ⅱ CT5, suitable for various harsh environments. |
| 3. Can be used to measure viscous, crystalline, and corrosive media. |
| 4. 4-20mA DC standard current signal output, two-wire operation, strong anti-interference ability with load. |
| 5. Small size, light weight, easy to install, debug, maintain, and use. |
| 6. High quality sensors and dedicated V/I integrated circuits are selected, with few peripheral components, high reliability, and simple and easy maintenance. |
| 7. Specialized HART intelligent communication, with superior performance. |
| 8. Online button configuration function. |
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Technical parameters/Technical parameters-------------------------------------------------------◆◆
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| accuracy |
0.1%F·S 0.25% F·S 0.5% F·S |
| measuring range |
-Choose between 95KPa and 60MPa |
| Measurement medium |
Liquid, gas, steam |
| Storage temperature |
-40～125℃ |
| supply voltage |
12~24V DC |
| Usage temperature |
-10～80℃ |
| Anticorrosive materials |
316l stainless steel |
| Temperature influence |
＜0.02%/℃ |
| load resistance |
≤750Ω |
| Overload capacity |
1-2 times the range |
| mechanical protection |
IP65 |
| humidity |
≤95%RH |
| output |
Two line system 4-20mA DC |
| Associated devices |
EXZ231B safety barrier |
| weight |
＜1Kg |
| zero temperature |
Less than 0.02%/℃ |
| Full range temperature coefficient |
Less than 0.02%/℃ |
| supply voltage |
24V DC |
| Explosion proof grade |
iaⅡCT5 |
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Overall dimensions----------------------------------------------------------◆◆
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Product selection/product selection------------------------------------------------------------◆◆
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1. Selection Chart
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| not have |
S |
code |
name |
| Simulated type |
Intelligent |
HH308 |
Diffuse silicon pressure transmitter |
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code |
DesIgn Serial Number |
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A1 |
Diffused silicon sensor |
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B1 |
Ceramic sensor |
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C1 |
Flat membrane sensor |
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D1 |
Sanitary sensor |
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code |
pressure type |
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A |
absolute pressure |
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G |
gauge pressure |
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S |
Sealed gauge pressure |
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code |
local display |
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1 |
not have |
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2 |
3 1/2 digit LCD |
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3 |
3 1/2 digit LED |
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code |
measuring range |
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1 |
0～35KPa |
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2 |
0～100KPa |
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3 |
0～200KPa |
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4 |
0～350KPa |
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5 |
0～700KPa |
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6 |
0～2.0Ma |
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7 |
0～3.5Ma |
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8 |
0～7Ma |
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9 |
0～20Ma |
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0 |
0～60Ma |
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code |
accuracy |
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A |
0.1%F·S |
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B |
0.25%F·S |
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C |
0.5%F·S |
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code |
Installation method |
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1 |
M20x1.5 |
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2 |
1/2NPT |
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3 |
Flange type (flange, optional diaphragm) |
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code |
Explosion proof method |
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N |
Ordinary non explosion proof |
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I |
Intrinsic safety explosion-proof |
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E |
Isolation and Explosion proof |
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2. Selection instructions
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| 1. Measuring pressure range; |
2. Probe model; |
| 3. Pressure type: (gauge pressure, absolute pressure); |
4. Accuracy level: (0.5, 0.25, 0.1); |
| 5. Meson temperature: 0-10-80 ° C |
6. Display format: no display, digital display; |
| 7. Installation method: M20x1.5 (threaded), flange; |
8. Power supply mode: 24V DC; |
| 9. Output signal: 4-20mA; |
10. Protection level: |
| 11. Explosion proof protection: |
12. Other accessories |
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Installation requirements/Installation requirements--------------------------------------------------◆◆
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| 1. Installation matters |
| 1. Install vertically below 0.03MPa to avoid affecting measurement accuracy; |
| 2. During installation, a wrench should be used to tighten the transmitter from the hexagonal nut at the bottom of the transmitter to avoid directly turning the upper part of the transmitter, which may cause disconnection of the wiring. |
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| 2. Precautions |
| When receiving the product, please check if the packaging is intact and verify if the transmitter model and specifications match the product you have purchased; |
| 2. It is prohibited to measure media that are incompatible with stainless steel; |
| 3. Ensure that the power supply voltage meets the probe power supply requirements, and that the positive and negative connections of the power supply correspond to the positive and negative wiring of the product, ensuring that the maximum pressure of the pressure source is within the range of the product; |
| 4. During the pressure measurement process, the pressure should be slowly increased and decreased to avoid sudden increase to the highest pressure or decrease to low pressure; |
| 5. When disassembling the probe, ensure that the equipment has disconnected the pressure source to prevent accidents caused by medium ejection. |
| 6. This product is not explosion-proof and can cause serious personal injury and significant material damage when used in explosion-proof areas; |
| 7. Sensors are precision components, so users should not disassemble them by themselves or touch the membrane to avoid product damage; |
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Wiring Guide/Wiring guide-----------------------------------------------------------------◆◆
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Common faults and solutions------------------------------------◆◆
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| Fault phenomenon |
cause analysis |
Troubleshooting |
| The transmitter has no output signal |
The transmitter is not powered |
Correct the power supply for the transmitter wiring diagram |
| wiring error |
| Output irregular jumps under constant pressure |
The transmitter housing is not grounded |
Use shielded cables and ground the shielding layer
Reliable connection between transmitter housing and ground
|
| Strong on-site RF interference |
| Not using shielded cables |
| When the transmitter is not connected to pressure, the corresponding output value is incorrect |
The transmitter is not working in its required environment |
Move the transmitter to work in the designated environment or take measures to meet the environmental load requirements |
| The transmitter output does not match the measured pressure |
Incorrect power supply |
Make the supply voltage 9-36VDC |
| Excessive external load |
Adjust external load |
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Attachment size/Accessory size-------------------------------------------------------------◆◆
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| Welded pipe joint |
base |
| Note: The standard thread size is M20x1.5, which can be customized according to customer requirements |
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