SRS Labs Lock-In Amplifier manual SR530 Specification Summary

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SR530 Specification Summary

General

 

 

 

 

Power

100, 120, 220, 240 VAC (50/60 Hz); 35 Watts Max

Mechanical

17" x 17" x 5.25" (Rack Mount Included) 16 lbs.

Warranty

Two years parts and labor.

Signal Channel

 

 

 

 

Inputs

Voltage:

Single-ended or True Differential

 

Current:

 

106 Volts/Amp

Impedance

Voltage:

100 MΩ + 25 pF, ac coupled

 

Current:

 

1 kΩ to virtual ground

Full Scale Sensitivity

Voltage:

100 nV (10 nV on expand) to 500 mV

 

Current:

 

100 fA to 0.5 µ A

Maximum Inputs

Voltage:

100 VDC, 10 VAC damage threshold

 

 

 

2 VAC peak-to-peak saturation

 

Current:

 

10 mA damage threshold

 

 

 

1 µ A ac peak-to-peak saturation

Noise

Voltage:

7 nV/√ Hz at 1 kHz

 

Current:

 

0.13 pA/√ Hz at 1 kHz

Common Mode

Range:

 

1 Volt peak; Rejection: 100 dB dc to 1KHz

 

 

 

Above 1KHz the CMRR degrades by 6 dB/Octave

Gain Accuracy

1% (2 Hz to 100KHz)

Gain Stability

200 ppm/°C

 

 

Signal Filters

60 Hz notch, -50 dB (Q=10, adjustable from 45 to 65 Hz)

 

120 Hz notch, -50 dB (Q=10, adjustable from 100 to 130 Hz))

 

Tracking bandpass set to within 1% of ref freq (Q=5)

Dynamic Reserve

20 dB

LOW

(1 µ V to 500 mV sensitivity)

 

40 dB

NORM

(100 nV to 50 mV sensitivity)

 

60 dB

HIGH

(100 nV to 5 mV sensitivity)

 

Bandpass filter adds 20 dB to dynamic reserve

 

Line Notch filters increase dynamic reserve to 100 dB

Reference Channel

 

 

 

 

Frequency

0.5 Hz to 100 kHz

Input Impedance

1 MΩ , ac coupled

Trigger

SINE:

 

100 mV minimum, 1Vrms nominal

 

PULSE:

 

±1 Volt, 1 µ sec minimum width

Mode

Fundamental (f) or 2nd Harmonic (2f)

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Contents Model SR530 Page Table of Contents Appendix C Gpib NON-OPERATING OperatingPage SR530 Specification Summary Gpib DemodulatorFront Panel Summary Enbw Abridged Command List Status Byte Definition Configuration SwitchesSensitivity Signal InputsSignal Filters SR510 Guide to Operation Front PanelChannel 1 Display Dynamic ReserveStatus Display SelectOffset Channel OutputOutput Channel Rel ChannelRcosø Output Expand ChannelChannel 2 Display Auto Phase Reference Input Rsinø OutputTrigger Level Time Constant Reference ModePhase Controls Reference DisplayDefaults PowerLocal and Remote SR530 Guide to Operation Rear Panel Page Front Panel Status LEDs Command SyntaxSR530 Guide to Programming Communicating with the SR530Try-Out with an Ascii Terminal RS232 Echo and No Echo OperationLOW Norm High SR530 Command ListN1,n2,n3,n4 Page Status Byte ErrorsBit Common Software Problems include ResetTrouble-Shooting Interface Problems Common Hardware Problems includeSR530 with the Gpib Interface SR530 with the RS232 InterfaceGpib with RS232 Echo Mode Serial Polls and Service RequestsSR530 with Both Interfaces Measurement Example Lock-in TechniqueShielding and Ground Loops Understanding the SpecificationsPage Page SR530 Block Diagram DC Amplifiers and System Gain Signal ChannelPhase Sensitive Detectors Reference ChannelCircuit Description Demodulator and Low Pass Amplifier Reference OscillatorMicroprocessor Control Analog Output and ControlExpand Front PanelRS232 Interface Power SuppliesGpib Interface Amplifier and Filter Adjustments Multiplier AdjustmentsCalibration and Repair Replacing the Front-End Transistors Notch FiltersNon-Essential Noise Sources Appendix a Noise Sources and CuresPage Page Case 2 RS232 with Control Lines Case 1 The Simplest ConfigurationAppendix B Introduction to the RS232 Baud RateFinal Tip Stop BitsParity Voltage LevelsBus Description Appendix C Introduction to the GpibProgram Example IBM PC, Basic, via RS232 Appendix D Program ExamplesProgram Example IBM PC, Microsoft Fortran v3.3, via RS232 Page #include stdio.h Program Example IBM PC, Microsoft C v3.0, via RS232Page Program Example 4 IBM PC,Microsoft Basic, via Gpib ′INCREMENT X6 Output by 2.5 MV Program Example HP85 via Gpib Documentation Dpdt Oscillator Board Parts ListPC1 SW1BT1 Main Board Parts ListBR1 BR2SR530 Component Parts List SR530 Component Parts List CX1 22U MINPIN D Gpib ShieldedFU1 CY1MPSA18 SR530 Component Parts List SR530 Component Parts List SR530 Component Parts List SR530 Component Parts List SR530 Component Parts List 4PDT SPSTX8SR513 Assy SR530 Component Parts List Static RAM, I.C Z80A-CPU#4 Flat TIE AnchorTranscover MicaFront Panel Board Parts List RED LD2 LD1LD3 Quad Board Parts List SR530 Component Parts List PC1 SR530 Component Parts List Miscellaneous Parts List SR530 Component Parts List

SR530, Lock-In Amplifier specifications

The SRS Labs Lock-In Amplifier, model SR530, is a powerful tool designed for high-precision measurements in the realm of scientific research and industrial applications. This state-of-the-art instrument excels in extracting small signals from noisy environments, making it an invaluable asset for experiments in fields such as physics, engineering, and materials science.

One of the main features of the SR530 is its ability to perform synchronous detection, which is key to improving signal-to-noise ratios. By utilizing a reference signal, the device correlates the incoming signal with the reference to effectively filter out noise, allowing for the accurate measurement of weak signals that might otherwise be obscured. This process of phase-sensitive detection is fundamental to the operation of the Lock-In Amplifier.

The SR530 offers a wide frequency range, covering from 0.1 Hz to 100 kHz. This broad frequency response allows it to handle a diverse array of signals, making it suitable for various applications including optical detection, capacitance measurements, and in many cases, voltammetry. The device is also equipped with multiple inputs and outputs, facilitating the integration with other laboratory equipment and enabling complex experimental setups.

Precision is further enhanced with its adjustable time constant, which allows users to optimize the response time based on experimental needs. The user can choose time constants from 10 microseconds to 10 seconds, accommodating fast dynamic measurements as well as those requiring stability over longer durations.

Another remarkable characteristic of the SR530 is its digital processing capabilities. The device features a highly accurate digital voltage measurement system, minimizing drift and ensuring long-term stability. Additionally, the use of microprocessors enhances data handling and allows for features such as programmable settings, facilitating automated measurements.

Moreover, the SR530 includes a range of output options, including analog outputs, which can be used for direct signal processing, as well as digital interfaces for integration with computers. This ensures that users can not only capture high-fidelity data but also analyze and display it efficiently.

In conclusion, the SRS Labs SR530 Lock-In Amplifier stands out due to its sophisticated technology, versatile features, and robust performance. Its precision, flexibility, and ease of use make it an ideal choice for researchers and engineers looking to unlock the potential of weak signal measurement in complex environments.