3HAC028357-001 DSQC679 ABB

3HAC028357-001 DSQC679 ABB Pressure Transmitter Operation Manual

1. Product Overview

The CVC750AE101 is a high-precision pressure transmitter with 0.25% accuracy, designed for industrial applications requiring 0-400 bar measurement range. Key features include:

• Output Signal: 4-20 mA (2-wire system)
• Power Supply: 12-42 VDC (reverse polarity protection)
• Environmental Rating: IP65 enclosure for dust/moisture resistance

2. Installation Procedures

2.1 Mechanical Mounting

• Secure the transmitter to the measurement point using M20×1.5 threaded connection (torque ≤ 50 N·m).
• Avoid mounting near vibration sources or high-temperature zones (>85°C).

2.2 Electrical Wiring

• Power/Output: Connect to terminal blocks as follows:+V (Pin 1) —— 24V DC+ -V (Pin 2) —— 24V DC- OUT+ (Pin 3) —— 4-20mA+ OUT- (Pin 4) —— 4-20mA-
• Shielding: Ground the cable shield at one end only (recommended at control panel side)

3. Calibration & Verification

3.1 Zero/Span Adjustment

• Use the calibration screw with a 2.5mm hex key:
  • Zero: Apply 0 bar pressure, adjust until output reads 4.00±0.02 mA
  • Span: Apply 400 bar pressure, adjust until output reads 20.00±0.05 mA

3.2 Functional Test

• Perform step pressure test (0%/50%/100% range) and verify:| Pressure | Expected Output | Tolerance | |----------|-----------------|-----------| | 0 bar | 4.00 mA | ±0.1 mA | | 200 bar | 12.00 mA | ±0.15 mA | | 400 bar | 20.00 mA | ±0.1 mA |

4. Maintenance & Troubleshooting

• Routine Check: Monthly inspection for:
  • Cable integrity (no abrasion/corrosion)
  • Connector tightness (retorque to 0.5 N·m if loose)
• Error Codes:
  • LED Red Blinking: Check power polarity (possible reverse connection)
  • Output Drift: Recalibrate or replace if deviation exceeds ±0.5% FS

5. Safety Compliance

• Complies with EN 61010-1 (Electrical Safety) and EN 61326-1 (EMC Immunity)
• Hazardous area installations require ATEX/IECEx certification (optional).