DS3800HAMC GE

Technical Specifications

• Product Type: High-Amplitude Millivolt/Current Output Board

• Part Number: DS3800HAMC

• Manufacturer: General Electric (GE)

• System Compatibility: GE Speedtronic Mark IV Turbine Control Systems

• Output Channels: 4 independent analog outputs

• Output Type: 0-100mV, 0-1Vdc, or 4-20mA (jumper-selectable)

• Drive Capability: Up to 20mA (voltage mode); up to 40mA (current mode)

• Resolution: 14-bit (higher precision)

• Accuracy: ±0.05% of full scale at 25°C; ±0.01% per °C drift

• Protection: Short-circuit and over-current protection per channel

• Isolation: 1500Vrms opto-isolation (logic-to-output)

• Temperature Range: 0°C to +60°C

• Heat Dissipation: Passive heatsink

• MTBF: > 150,000 hours (MIL-HDBK-217F)

Key Features & Advantages

• High-Resolution Millivolt Output: The GE DS3800HAMC provides 14-bit resolution, delivering precise low-level signals for sensitive field devices.

• Flexible Output Modes: Jumper-selectable millivolt (0-100mV), voltage (0-1V), or current (4-20mA) outputs.

• High Accuracy: ±0.05% accuracy with low drift ensures precise control.

• Low Noise: Designed for low-noise operation, critical for millivolt-level signals.

• Short-Circuit Protection: Protected outputs prevent damage during installation or faults.

• Diagnostic LEDs: Front-panel LEDs indicate output status per channel.

Typical Application Cases

• Thermocouple Reference Junction Compensation: The GE DS3800HAMC provides precision millivolt signals for thermocouple reference circuits.

• Strain Gauge Bridge Excitation: Supplies low-level excitation for strain gauge bridges in turbine monitoring systems.

• Electro-Pneumatic Converters: Drives 4-20mA signals to E/P converters requiring high accuracy.

• Laboratory and Test Applications: Used for precision signal generation during calibration and testing.

Competitive Comparison

The GE DS3800HAMC is the only Mark IV board offering millivolt-level precision outputs with 14-bit resolution.

Selection Guidelines & Precautions

1. Output Mode Selection: Configure jumpers for millivolt (0-100mV), voltage (0-1V), or current (4-20mA) to match your field device.

2. Load Impedance: For voltage modes, ensure load ≥ 10kΩ; for current mode, ensure load ≤ 600Ω.

3. Noise Immunity: Use shielded twisted-pair cables for millivolt outputs to prevent noise pickup.

4. Commissioning: Use a precision multimeter to verify output accuracy.

5. ESD Handling: Use ESD-safe practices.

6. Sourcing: Obsolete. Request functional test report including all channels tested at all output modes.

7. Spare Strategy: Keep one spare GE DS3800HAMC on-site for precision signal applications.