The Stanford Research Systems SR510 is a single-phase analog lock-in amplifier designed for phase-sensitive detection of weak AC signals in high-noise environments. It features a broad operating frequency range from 0.5 Hz to 100 kHz, high dynamic reserve up to 80 dB, integrated tracking band-pass and line filters, and digital control with standard RS-232 and GPIB interfaces.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | GPIB (IEEE-488), RS-232 |
| Display | Analog meter and 4-digit LED display |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100 / 120 / 220 / 240 VAC (selectable), 50/60 Hz, 35 W |
| Operating Temperature | 0°C to 50°C |
| Dimensions (W×H×D) | 432 mm × 133 mm × 368 mm |
| Weight | 7.3 kg |
Signal Channel
| Parameter | Value |
|---|---|
| Input Configuration | Single-ended (A) or differential (A-B) |
| Voltage Input Impedance | 100 MΩ in parallel with 45 pF |
| Voltage Input Full-Scale Sensitivity Range | 100 nV to 500 mV in 1-2-5 sequence |
| Current Input Full-Scale Sensitivity Range | 1 fA to 500 nA |
| Frequency Range | 0.5 Hz to 100 kHz |
| Voltage Input Noise | 7 nV/√Hz at 997 Hz (typical) |
| Current Input Noise | 0.13 pA/√Hz at 997 Hz (with 10^6 V/A setting), 13 fA/√Hz at 997 Hz (with 10^8 V/A setting) |
| Common Mode Rejection Ratio (CMRR) | 100 dB at 100 Hz, decreasing by 6 dB/octave |
| Dynamic Reserve | Up to 60 dB |
| Maximum Input Voltage | 100 VDC, 10 VAC |
| Gain Accuracy | ±1% (excluding band-pass filter) |
| Gain Stability | ±200 ppm/°C |
| Input Coupling | AC or DC |
| Input Shield Grounding Options | Float (10 kΩ to chassis) or Ground |
| Line Notch Filters | 50/60 Hz and 100/120 Hz (attenuation > 30 dB) |
| Tracking Band-Pass Filter | Q = 5, center frequency tracks the reference frequency from 10 Hz to 100 kHz |
| Dynamic Reserve Modes | Low Noise, Normal, High Reserve |
| Line Notch Filter Rejection | >30 dB |
Reference Channel
| Parameter | Value |
|---|---|
| Reference Frequency Range | 0.5 Hz to 100 kHz |
| Reference Input Voltage Range | Sine: 100 mV minimum; TTL: 1.6 V threshold |
| Reference Waveform Requirements | Sine wave or square wave (TTL) |
| Phase Resolution | 0.1° |
| Phase Accuracy | 2° |
| Phase Range | 360° (with 90° shifts and 0.1° fine steps) |
| Phase Drift | 0.1°/°C |
| Reference Acquisition Time | 25 s (at 1 Hz), 2 s (at 10 Hz), 1 s (at 100 Hz to 100 kHz) |
| Harmonic Detection Capabilities | 1f (fundamental) or 2f (second harmonic) |
| Reference Minimum Input Pulse Width | 1 µs |
| Phase Resolution (Remote Interface) | 0.025° |
| Phase Resolution (Front Panel) | 0.1° |
Internal Oscillator
| Parameter | Value |
|---|---|
| Oscillator Frequency Range | 1 Hz to 100 kHz |
| Oscillator Frequency Resolution | 5-decade range selector and continuous dial control |
| Oscillator Frequency Accuracy | ±5% |
| Oscillator Output Amplitude Range | 1 mV to 1 V rms |
| Oscillator Output Amplitude Resolution | Adjusted via continuous dial control |
| Oscillator Distortion (THD) | 1% THD |
| Oscillator Output Impedance | 600 Ω |
| Oscillator Output Waveform | Sine |
| VCO Frequency Drift | 150 ppm/°C |
| VCO Amplitude Drift | 500 ppm/°C |
Demodulator and Filtering
| Parameter | Value |
|---|---|
| Time Constant Range | 1 ms to 100 s (1-3-10 sequence) |
| Low-Pass Filter Roll-off Slopes | 6 dB/octave or 12 dB/octave |
| Output DC Drift | <5 ppm/°C (high stability), <50 ppm/°C (normal), <500 ppm/°C (high reserve) |
Auxiliary Inputs and Outputs
| Parameter | Value |
|---|---|
| Auxiliary ADC Inputs | 4 channels |
| Auxiliary ADC Input Voltage Range | ±10.24 V |
| Auxiliary ADC Resolution | 13-bit (2.5 mV) |
| Auxiliary ADC Conversion Time | 60 ms |
| Auxiliary DAC Outputs | 2 channels |
| Auxiliary DAC Output Voltage Range | ±10.24 V |
| Auxiliary DAC Resolution | 13-bit (2.5 mV) |
| Auxiliary DAC Max Output Current | 10 mA |
| Analog Output (Rear Panel) | X analog output (Front Panel, BNC, ±10 V) |
| Preamplifier Power Port Voltage | ±15 VDC |
| Preamplifier Power Port Current | 100 mA |
Display and Front Panel
| Parameter | Value |
|---|---|
| Display Type | Analog meter and 4-digit LED display |
| Status Indicators | LEDs for overload, reference lock, offset, and scale |
| Output Offset Range | Up to ±10 V (1000% of full scale) |
| Output Offset Resolution | 0.1% of full scale |
Physical and Environmental
| Parameter | Value |
|---|---|
| Operating Temperature Range | 0°C to 50°C |
| Rack Mounting | 19" rack mountable with optional rack ears |
Power Specifications
| Parameter | Value |
|---|---|
| AC Line Voltage Requirements | 100, 120, 220, or 240 VAC (selectable) |
| AC Line Frequency Range | 50/60 Hz |
| Power Consumption | 35 W |
| AC Fuse Rating | 0.5 A (100/120 V) or 0.25 A (220/240 V) |
Interfaces and External Control
| Parameter | Value |
|---|---|
| GPIB Interface Support | Standard (IEEE-488) |
| RS-232 Interface Support | Standard, up to 19.2 kbaud |
Signal Input
| Parameter | Value |
|---|---|
| Current Input Impedance | 1 k̩ to virtual ground (100 nA to 500 ̢A), 100 k̩ to virtual ground (100 pA to 50 nA) |
Data Storage
| Parameter | Value |
|---|---|
| Data Buffer Capacity | 2000 points |
| Data Buffer Sample Rate | 1/8 Hz to 512 Hz |
Interfaces
| Parameter | Value |
|---|---|
| RS-232 Baud Rates | 300, 1200, 2400, 4800, 9600, 19200 baud |
Outputs
| Parameter | Value |
|---|---|
| Analog Outputs Output Impedance | <1 Ω |
| Demodulator Monitor Output Voltage Range | ±10 V |
| Demodulator Monitor Output Impedance | 10 kΩ |
| CH 1 Output Voltage Range | ±10 V |
Auxiliary D/A Outputs
| Parameter | Value |
|---|---|
| Auxiliary DAC Accuracy | 0.1% + 5 mV |
Auxiliary A/D Inputs
| Parameter | Value |
|---|---|
| Auxiliary ADC Accuracy | 0.1% + 5 mV |
Technology
Single-Phase Analog Lock-In Amplifier
Applications
Phase-sensitive detection of weak AC signals in high-noise environments