GE DS3800DVRC1A1A1A

Technical Specifications

• Product Type: Digital Voltage Reference & Calibration Board (Revision 1A1A1A)

• Part Number: DS3800DVRC1A1A1A

• Manufacturer: General Electric (GE)

• System Compatibility: GE Speedtronic Mark IV Turbine Control Systems

• Reference Outputs: 4 precision voltage references (±1V, ±5V, ±10V, and 0-10V)

• Accuracy: ±0.01% of full scale at 25°C; ±0.0015% per °C drift (best in series)

• Temperature Stability: < 1.5ppm/°C (ultra-stable hermetically sealed reference)

• Long-Term Stability: < 15ppm/year

• Load Regulation: < 0.003% for 0 to 10mA load

• Line Regulation: < 0.001% for ±10% input variation

• Protection: Short-circuit protected outputs with foldback current limiting

• Isolation: 2500Vrms reinforced isolation with enhanced common-mode rejection

• Temperature Range: -40°C to +75°C (widest in series)

• MTBF: > 350,000 hours (MIL-HDBK-217F)

Key Features & Advantages

• Ultra-Stable Revision: The GE DS3800DVRC1A1A1A uses the highest-grade hermetically sealed reference components, delivering < 1.5ppm/°C drift – the best performance in the entire DVRC product line.

• Exceptional Long-Term Stability: < 15ppm/year significantly extends calibration intervals and maintains system accuracy over decades of service.

• Highest Accuracy: ±0.01% with improved temperature coefficient ensures calibration integrity across all operating conditions.

• Reinforced Isolation: 2500Vrms with enhanced common-mode rejection protects against ground loops and industrial noise.

• Widest Temperature Range: -40°C to +75°C suits extreme environments, including outdoor, arctic, and desert installations.

• Foldback Current Limiting: Enhanced short-circuit protection with foldback reduces stress during fault conditions.

• Four Common Reference Values: ±1V, ±5V, ±10V, and 0-10V cover all Mark IV analog board ranges.

• Diagnostic LEDs: Status indicators for each reference output.

• External Test Points: Accessible test points for external voltmeter verification.

Typical Application Cases

• Analog Input Calibration: Calibrates DS3800DVIA, DS3800DVIA1A1B, and all voltage input boards.

• Analog Output Verification: Verifies servo driver boards (DS3800DSAB, DS3800DSQD) and other output boards.

• System Diagnostics: Provides a known-good, traceable signal source for board-level troubleshooting.

• Preventive Maintenance: Used during annual or biennial calibration checks.

• Commissioning: Essential for initial system verification and acceptance testing.

• Offshore & Remote Sites: Extreme temperature tolerance makes it ideal for unmanned platforms.

Competitive Comparison

The GE DS3800DVRC1A1A1A is the definitive calibration reference for the Mark IV system, offering the best stability, widest temperature range, and longest calibration intervals.

Selection Guidelines & Precautions

1. Reference Verification: Verify outputs with a NIST-traceable external voltmeter before use. If drift is detected, factory recalibration is required.

2. Load Conditions: Maintain load current below 10mA per output for specified accuracy. For higher loads, use an external buffer amplifier with < 1pA input bias current.

3. Warm-Up Time: Allow the GE DS3800DVRC1A1A1A to stabilize for at least 30 minutes after power-up before performing critical calibrations. For maximum accuracy, allow 1 hour.

4. Short-Circuit: While protected with foldback current limiting, repeated shorting may eventually affect accuracy; avoid intentional shorts.

5. Calibration Interval: GE recommended recalibration every 3 years due to improved long-term stability. For critical measurements (e.g., exhaust temperature), consider annual verification.

6. ESD Handling: Use ESD-safe practices; contains ultra-precision reference components sensitive to static discharge.

7. Sourcing: Obsolete. Request comprehensive functional test report including:

   • All 4 reference outputs verified for accuracy (±0.01%)

   • Temperature drift test (< 1.5ppm/°C) over full range

   • Load regulation test (< 0.003%)

   • Isolation verification (2500Vrms)

   • Long-term stability test (if available from supplier records)

   • Foldback current limit verification

8. Spare Strategy: Keep one spare GE DS3800DVRC1A1A1A on-site. For critical facilities with extensive analog I/O, consider maintaining two spares to eliminate downtime during external recalibration. If unable to source this exact revision, the DS3800DVRC1A1A is the closest compatible alternative with slightly lower stability specifications.