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LPI-400 Loop Powered Indicator – LED Display
The LPI-400 Series Loop Powered Indicator is a versatile device designed for various industrial control and measurement applications. This indicator accepts 4-20 mA loop current input from 2 or 3 wire process transmitters, providing a reliable process value display. Noteworthy features include user programmability with password protection, easy programming through push buttons or a magnetic pen (for Flameproof model), and a temperature coefficient of accuracy at 0.005% FS/°C. With a 4 digit LED display, the LPI-400 Series offers high accuracy of ±0.1% of the full-scale range and supports linear or square root operational modes, programmable by the user. The device has a range-locking/unlocking facility, offset adjustment to compensate for field errors, and operates without the need for an external power supply. Additionally, it provides a range of monitoring functions, displaying ‘Under/Over’ when input current falls below or goes above set values.
1. User Programmability with Password Protection:
– Loop Powered Indicator allows customization while ensuring security through password protection.
2. Easy Programming Interface:
– WP & PM models feature straightforward programming using push buttons.
– Flameproof model allows non-intrusive programming with a magnetic pen.
3. Temperature Coefficient of Accuracy:
– Accuracy maintained with a low temperature coefficient of 0.005% FS/°C.
4. Software Calibration:
– Calibration made easy without the need for trimpots.
5. Reverse Polarity Protection:
– Safeguards the device from damage due to reversed electrical polarity.
6. Low Loop Voltage Drop:
– Minimal voltage drop (< 4.8 VDC) across the loop, ensuring efficient operation.
7. 4-20 mA Loop Current Input:
– Loop Powered Indicator accepts input from transmitters, supporting 2 or 3 wire configurations.
8. High Accuracy Display:
– 4 digit LED display with an accuracy of ± 0.1% of Full Scale Range.
9. Range Locking/Unlocking Facility:
– Provides the option to lock or unlock the measurement range.
10. Offset Adjustment:
– Allows users to compensate for field errors by adjusting the offset.
11. Operational Mode Flexibility:
– User-programmable linear or square root operational modes.
12. No External Power Supply Required:
– Functions efficiently without the need for an external power source.
Technical Specifications:
1. General:
– Input: 4-20 mA Loop Current Input.
– Range: LPI – 400 -FLP: (-1999 to 9999).
– Resolution: 0001, 000.1, 00.01, 0.001.
– Display: 0.39” 5 Digit Red LED Display.
– Calibration: Software calibration.
– Accuracy: Linear: ± 0.1% of span; Square root: ± 0.2% of span.
– Temperature Coefficient of Accuracy: 0.005% FS/°C.
– Warm-up Time: 10 Sec.
2. Electrical:
– Loop Voltage Drop: < 4.8 V DC.
3. Environmental:
– Operating Temperature: -10°C to 50°C.
– Relative Humidity: Below 95% non-condensing.
4. Panel Mount Housing:
– Protection Class: IP-40.
– Cabinet Material: ABS Plastic, Black color.
– Dimensions: 96 (H) x 96 (W) x 85 (D) -in mm.
– Mounting: Panel Mounting.
– Weight: Approx 250 Grams.
5. Weatherproof Housing:
– Protection Class: IP-65.
– Cabinet Material: Polycarbonate, Grey color.
– Dimensions: 120 (H) x 100 (W) x 60 (D) -in mm.
– Mounting: Wall Mounting / Stand Mounting.
– Weight: Approx 250 Grams.
6. Flameproof Housing:
– Protection Class: Blue Enclosure IP-66 (CMRI approved for IIA & IIB Gas Group).
– Cabinet Material: Cast Aluminium alloy, LM-6 / C.I. Enclosure.
– Dimensions: 155mm (H) x 223 mm (W) x 125 mm (D).
– Mounting: Wall Mounting / Stand Mounting.
– Weight: Approx 1 Kg.
| 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. |