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Loop Powered Indicator | LPI-500
The LPI-500 Series Loop Powered Indicator is a versatile device designed for industrial control and measurement applications. Featuring a 5-digit LED display, the indicator accepts a 4-20 mA loop current input from 2/3-wire process transmitters. With user-programmable settings and password protection, it offers easy calibration using software, eliminating the need for trimpots. The indicator operates within a wide temperature range (-10°C to 50°C) and has a temperature coefficient of accuracy at 0.005% FS/°C. Its accuracy is impressive, with a deviation of ±0.1% of the full-scale range in linear mode and ±0.2% in square root mode. The unit provides a quick display update rate of 1 second in both modes. Designed for flexibility, the LPI-500 can be set in linear or square root operational mode based on user preferences. It features a range locking/unlocking facility and an offset adjustment to compensate for field errors. With a loop voltage drop of less than 4.8 VDC and reverse polarity protection, the indicator ensures reliable performance.
1. User Programmable with Password Protection:
– Loop Powered Indicator allows customization while ensuring data security.
2. Easy Programming with Push Buttons (WP & PM Models):
– Simplifies the configuration process for specific models.
3. Non-Intrusive Programming (Flameproof Model):
– Loop Powered Indicator utilizes a Magnetic Wand for hassle-free programming in hazardous environments.
4. Temperature Coefficient of Accuracy 0.005% FS/°C:
– Maintains accuracy across a wide temperature range.
5. Software Calibration – No Trimpots:
– Streamlines calibration without the need for physical adjustments.
6. Reverse Polarity Protection:
– Guards against damage due to incorrect polarity connections.
7. Low Loop Voltage Drop (<4.8 VDC):
– Minimizes power consumption and ensures efficient operation.
8. 4 – 20 mA Loop Current Input from Transmitters:
– Accepts input from a variety of process transmitters for flexibility.
9. Accuracy ± 0.1% Of Full Scale Range:
– Provides precise readings for enhanced reliability.
10. 5 Digit LED Display:
– Offers a clear and readable display for process values.
11. Range Locking/Unlocking Facility:
– Allows users to secure or adjust the measurement range as needed.
12. Offset Facility to Compensate Field Error:
– Provides fine-tuning to account for field-specific discrepancies.
13. Operational Mode Linear/Square Root; Programmable by User:
– Adaptable operational modes for diverse measurement needs.
14. No External Power Supply Required:
– Operates independently without the need for an external power source.
Technical Specifications:
1. Input:
– 4-20 mA Loop Current Input from any 2/3 Wire Process Transmitter.
2. Range:
– -19999 to 99999 with adjustable resolution (1, 0.1, 0.01, 0.001).
3. Display:
– 0.39” 5 Digit Red LED Display with a linear mode update rate of 1 sec.
4. Status Indication:
– Alerts for ‘Under’ and ‘Over’ values with customizable setpoints.
5. Calibration:
– Software calibration with a warm-up time of 10 seconds.
6. Accuracy:
– Linear: ±0.1% of span; Square root: ±0.2% of span.
7. Electrical:
– Loop Voltage Drop: < 4.8 V DC, @ 24VDC with short-circuit protection.
8. Environmental:
– Operating Temperature: -10°C to 50°C; Relative Humidity: Below 95% non-condensing.
9. Housing Options:
– Panel Mount (IP-40), Weatherproof (IP-65), Flameproof (IP-66).
10. Dimensions and Mounting:
– Varied dimensions and mounting options for different housing types.
11. Weight:
– Approximately 250 grams for panel and weatherproof; 1 kg for flameproof.
| Provides Process Value Indicator in various Industrial Control & Measurement Applications such as Pressure, Flow, Level, Temp., Humidity etc. |
| Remote Indicator at the point of measurement or at the control end, especially where there is no power source. |
| Being a Non-Voltage Producing Device, it can be directly used in Hazardous Areas with Suitable Enclosure. |
| Replaces an Analog Meter with no additional wiring and power connection. |
| Can be inserted at any point in the signal loop as a stand-alone as it requires no external power. |
| Remote Indication location on tank taps as used in liquid level sensing & control. |