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loop-powered process indicator
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loop-powered process indicator
Product catalog summary
Overview: The document provides technical specifications and instructions for the DPM 942, a 4-20mA loop powered indicator. It includes details on dimensions, calibration, safety, and operating modes.
Specifications:
- Digit Height: 19mm (0.75 inches)
- Accuracy: 0.05% to 0.1% (±1 count)
- Linearity: ±1 count
- Sample Rate: 3 samples/sec
- Operating Temperature Range: 0 to 50°C
- Temperature Stability: 100 ppm/°C
- Loop Volt Drop: 3.9 to 4.8 V
Custom Scaling: For non-standard scaling, modify links and add resistors R12 and R13. The formula for scaling is R12 + R13 = Full Scale reading at 20mA / 160.
Calibration Procedure:
- Apply 4mA to I+/I- and adjust 'OFFSET' to read 000.
- Apply 20mA and adjust 'SPAN' to read 1000.
- Repeat until no further adjustment is needed.
Safety and Compliance: Ensure input voltages do not exceed 60Vdc to comply with LVD 93/68/EEC. The device should conform to BSEN 61010 standards.
Operating Modes: The device features on-board links for easy mode changes. It is powered by the 4-20mA signal loop and requires correct polarity connection.
Panel Fitting: The document provides dimensions for panel cut-out and maximum panel thickness.
Contact Information: Includes contact details for Lascar Electronics in the UK, Hong Kong, and the USA.
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