GE DS3800DVRC1A1A

Technical Specifications

• Product Type: Digital Voltage Reference & Calibration Board (Revision 1A1A)

• Part Number: DS3800DVRC1A1A

• 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; ±0.002% per °C drift

• Temperature Stability: < 2ppm/°C (hermetically sealed reference)

• Long-Term Stability: < 20ppm/year

• Load Regulation: < 0.005% for 0 to 10mA load

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

• Protection: Short-circuit protected outputs

• Isolation: 2500Vrms reinforced isolation (upgraded)

• Temperature Range: -40°C to +70°C (extended)

• MTBF: > 300,000 hours (MIL-HDBK-217F)

Key Features & Advantages

• Highest Stability Revision: The GE DS3800DVRC1A1A uses hermetically sealed reference components, delivering < 2ppm/°C drift – the best in the DVRC series.

• Superior Long-Term Stability: < 20ppm/year minimizes recalibration frequency and maintains system accuracy over extended periods.

• Reinforced Isolation: Upgraded to 2500Vrms, providing better protection against ground loops and voltage transients.

• Extended Temperature Range: -40°C to +70°C, suitable for outdoor or unheated turbine enclosures.

• High-Precision References: ±0.01% accuracy, essential for calibrating the Mark IV’s analog-to-digital converters.

• Four Common Reference Values: Offers ±1V, ±5V, ±10V, and 0-10V.

• Short-Circuit Protection: Protected outputs prevent damage during calibration setup.

• Diagnostic LEDs: Front-panel LEDs indicate reference output status.

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

Typical Application Cases

• Analog Input Calibration: Calibrates DS3800DVIA, DS3800DVIA1A1B, and other analog input boards.

• Analog Output Verification: Verifies accuracy of servo driver and output boards.

• System Diagnostics: Provides known-good signal source for troubleshooting.

• Preventive Maintenance: Used during annual calibration checks.

• Commissioning: Essential for initial startup verification.

Competitive Comparison

The GE DS3800DVRC1A1A is the most stable and environmentally robust revision, preferred for critical applications and harsh environments.

Selection Guidelines & Precautions

1. Reference Verification: Verify outputs with a calibrated external voltmeter before use. If drift is observed, factory recalibration is required.

2. Load Conditions: Accurate only when load current is below 10mA. For higher loads, use external buffer amplifier.

3. Warm-Up Time: Allow the GE DS3800DVRC1A1A to stabilize for at least 30 minutes after power-up before performing critical calibrations.

4. Short-Circuit: While protected, prolonged shorting may degrade accuracy.

5. Calibration Interval: GE recommended recalibration every 2-3 years due to improved stability. Send to qualified calibration lab.

6. ESD Handling: Use ESD-safe practices; contains precision reference components.

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

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

   • Temperature drift test (< 2ppm/°C)

   • Load regulation test (< 0.005%)

   • Isolation verification (2500Vrms)

   • Long-term stability test (if available)

8. Spare Strategy: Keep one spare GE DS3800DVRC1A1A on-site. For critical sites, consider NIST-traceable external calibrator as backup.