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LPT-LC Dual-Flange Pressure Transmitter
● High-performance monocrystalline silicon core
●24-bit high-precision ADC
● Core and Circuit Dual Compensation
● Can be configured via HART handheld device
● Level Measurement in Closed Containers
●Suitable for high-vacuum containers
● Equipped with RS485 functionality (please specify when ordering)
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Product Description
Product Overview Product overview
The LPT-LC series dual-flange pressure/level transmitters feature a microprocessor-based, modular circuit design that delivers excellent anti-interference performance. Equipped with a built-in temperature sensor for transmitter compensation, these devices enhance measurement accuracy while minimizing temperature drift, ensuring long-term stability and high reliability, along with robust self-diagnostic capabilities. Users can easily calibrate, configure, and set up the transmitters using a HART-compatible handheld communicator. The interface includes function sections with distinct password-protected access levels, allowing users to conveniently customize settings as needed. These transmitters are ideal for level measurement in sealed containers and are available in materials suited for handling viscous or corrosive media. They find extensive applications across industries such as chemical processing, metallurgy, water resources, power generation, and petroleum production.
Performance Metrics TECHNICAL PARAMETERS
| Measuring medium | Gas, liquid, vapor | ||
| Measurement Range (*Involves secondary encapsulation with oil; measurement range and flange specifications must be verified.) |
Minimum range (kPa) | Measurement Range and Sensor Limit Values (kPa) | |
| Maximum Range (URL) | Minimum Range (LRL) | ||
| 1.0 | 6.0 | -6.0 | |
| 4.0 | 40 | -40 | |
| 10.0 | 100 | -100 | |
| 12.5 | 250 | -100 | |
| 25.0 | 500 | -100 | |
| 25.0 | 1000 | -100 | |
| 87.5 | 3500 | -100 | |
| Measurement range ratio: | 40:1 | ||
| Precision | Class 0.2, Class 0.5 (including linearity, hysteresis, and repeatability) | ||
| Range ratio impact: | Class 0.2 | When the range ratio is 1:1 to 10:1, the calibration accuracy is ±0.20% of the span. | |
| When the range ratio exceeds 10:1, it is ±[0.03 × range ratio - 0.1]%; | |||
| Stability | Class 0.2 | The error over 36 months is ±0.25% of the full scale. | |
| Temperature Influence | Class 0.2 | Zero-point or span error is ±0.25% of the full scale, per 28°C. | |
| Power supply impact | Less than ±0.005%/V of the calibration range | ||
| Vibration Impact | Less than ±0.05%/g of the maximum range | ||
| Installation Impact | Zero drift is no more than 0.25 kPa; this error can be eliminated by zero adjustment, without affecting the measurement range. | ||
| Static Pressure Influence | Zero-point impact | ±0.1% URL/10 MPa | |
| Measurement Range Influence | ±0.2% URL/10 MPa | ||
| Output signal | 4-20mA + HART (can simultaneously support RS485) | ||
| Power supply | 15-36VDC | ||
| Ambient temperature: | -40℃ to 85℃ | ||
| Medium temperature | -40℃ to 120℃ | ||
| Storage Temperature | -40℃ to 85℃ | ||
| Display | 7-digit LCD display | ||
| Protection Level | IP65 | ||
| Explosion-proof rating | Exd IIC T6Gb | ||
External dimensions APPEARANCE OF SIZE
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Installation Requirements INSTALLATION
Note:
1. Please ensure that the inner diameter of the gasket used is larger than the inner diameter of the diaphragm seal. If the gasket's inner diameter is smaller than that of the diaphragm seal, it may affect the proper functioning of the diaphragm, leading to errors or even damage to the diaphragm.
2. Be careful not to damage the membrane surface—placing the membrane face down may cause harm to its surface.
3. Do not bend, squeeze the capillary tube, or apply excessive pressure to it.
4. Do not loosen the four screws on the chamber flange (if the filling fluid leaks, the transmitter will stop working).
5. Install the flanged diaphragm on the high- and low-pressure sides of the liquid tank, as indicated by the H and L labels.
6. To avoid measurement errors caused by temperature differences, the capillary tubes can be bundled together. The capillaries must be securely fixed to the tank wall to prevent interference from wind and vibrations. If the capillaries are too long, they should be coiled and secured with clips.
Note:
Open the transmitter display cover; the display screen can rotate 330° and is adjustable after installation, ensuring optimal readability of the on-site display unit. Note that the connecting cable behind the display should not be overrotated.
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Tianjin Ling Yu Technology Co., Ltd.
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