Ambetronics

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.

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