DS200SVAAG1ACC | GE Mark V Precision Servo Amp

Description

Product Core Brief

• Model: DS200SVAAG1ACC
• Brand: General Electric (GE)
• Series: Mark V DS200
• Core Function: High-precision servo valve amplifier
• Product Type: Precision Servo Amplifier (1 channel)
• Key Specs: 18-bit I/O | ±0.01% linearity | 5 ppm/°C | Adjustable limit | Current monitor
• Condition: New Original.

Product Introduction

The DS200SVAAG1ACC is a high-precision servo valve amplifier for GE’s Mark V DS200 series, used in Speedtronic turbine control systems. It provides 18-bit resolution (0.76 µA per bit) and ±0.01% linearity—dramatically finer than standard 12–16 bit amplifiers.

The “ACC” suffix represents the precision variant. Features: 18-bit input ADC, 18-bit output DAC, ±0.01% linearity, 5 ppm/°C temperature drift, adjustable current limit (10–250 mA), 18-bit current monitor output, and ultra-low output noise (<5 µA RMS). Use it for precision hydraulic valves, fuel metering valves requiring sub-microamp resolution, or applications demanding the highest possible valve positioning accuracy.

Key Technical Specifications

Key Selling Points & Differentiators

• 18-bit output resolution (0.76 µA/bit) – 256x finer than standard 10-bit amplifiers (0.2 mA/bit). Sub-microamp control for precision valves.
• ±0.01% linearity – Ten times better than standard (±0.1%). Essential for high-precision fuel metering.
• 5 ppm/°C temperature drift – Standard amplifiers drift 100 ppm/°C. Maintains accuracy over temperature.
• 18-bit current monitor – Measure actual valve current with 0.1% accuracy. Closed-loop current control.
• Low noise output (<5 µA RMS) – No valve dither from amplifier noise.
• Low-distortion sine dither – Standard uses crude triangle wave. Sine dither reduces mechanical wear.
• Auto-calibration via software – Push-button calibration. Removes offset and gain errors.
• NIST-traceable calibration certificate – 21-point test, 0–200 mA in 10 mA steps.
• 5-year warranty

Frequently Asked Questions (FAQ)

Q: What is the difference between SVAAG1A (enhanced) and SVAAG1ACC (precision)?

Q: Do I need 18-bit resolution for a hydraulic valve?
A: For most valves, no. 12-bit (0.05 mA) is sufficient. 18-bit required for:

• Direct-drive valves with very low hysteresis
• Fuel metering for low-NOx gas turbines
• Hydrogen seal oil valves (sub-micron positioning)
• Research or acceptance testing

Q: How does low output noise improve valve life?
A: Standard amplifiers have 50–100 µA RMS noise. This dithers the valve continuously, causing wear. 5 µA noise is below valve threshold—valve remains stationary when not commanded.

Q: What is the auto-calibration procedure?
A: Connect PC via USB. Run software. Click “Auto-Cal”. Board internally measures offset (0 mA) and gain (200 mA). Stores coefficients in EEPROM. Takes 10 seconds. No external meter required.

Q: What is the current limit resolution?
A: 16-bit (3.7 mA per bit) from 10–250 mA. Set via software or potentiometer.

Q: What QC tests are specific to the ACC revision?
A: Ten tests:

1. Output resolution: 18-bit, no missing codes
2. Output linearity: 0–200 mA, error <±0.01%
3. Temperature drift: 5 ppm/°C
4. Output noise: <5 µA RMS
5. Current monitor: 18-bit, ±0.1% accuracy
6. Dither THD: <0.5%
7. Auto-calibration: residual error <0.01%
8. Isolation: 3000 VAC
9. Warm-up stability: 1 hour, drift <0.005%
10. Burn-in: 168 hours at +50°C

Q: What shipping protection?
A: Anti-static bag, ESD foam cradle, hard plastic clamshell case, desiccant. Double-wall box with “PRECISION INSTRUMENT” labels. Calibration certificate (NIST) laminated. Auto-calibration software on USB. Gold-plated terminal blocks included. External power supply (24 V, 5 A) included. Each board ships individually. Do not unpack without 4-hour temperature stabilization. Factory site visit recommended for first-time precision applications. Contact us for application engineering support.

APP-DRV-DOS DCS
APP-DRV-QNX PLC DCS
APP-DRV-VXW PLC DCS
APP-DDK-LNX PLC DCS