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SRS EC301 Potentiostat/Galvanostat

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Product Code: 30211
Manufacturer: Stanford Research Systems

  • ±30 V compliance voltage

  • ±1 A maximum current

  • ±15 V polarisation range

  • Front-panel setup & operation

  • Free full-featured Windows software

  • Built-in EIS to 100 kHz

  • 1 MHz control bandwidth for EIS

  • Ramps from 0.1 mV/s to 10 kV/s

  • GPIB and Ethernet interfaces 

Front-Panel Operation

The intuitive front panel of the Stanford Research Systems EC301 allows you to quickly and easily set up several scan types (CV, LSV, steps and holds). Unlike many competitive models, the SRS EC301 is a stand-alone instrument – you don’t need to use a computer. The array of indicator LEDs make it easy to know the state of the instrument at a glance.

Software Included

The SRSLab software supports all the major electrochemical techniques including voltammetry, pulsed waveforms, step techniques, and EIS. You can even design your own custom measurements. Data is acquired over the TCP/IP interface or via IEEE-488 (GPIB). The software lets you easily configure sequences of experiments and shows you the data as they are generated. The data is easily exported to spreadsheets and graphing packages.

Designed for EIS

The SRS EC301 was designed with electrochemical impedance spectroscopy (EIS) in mind. Instead of employing driven shields, we bring the measurement close to the cell. This means higher accuracy and less susceptibility to parasitic effects. Shunt resistor current measurements in all ranges enhance control loop stability, enabling EIS at high frequencies. An external frequency response analyser (FRA) can be used measure EIS at frequencies up to 1 MHz using analog connections. The EC301 performs stand-alone EIS measurements up to 100 kHz.

Compliance Limiting

Quite often, electrochemists are working with sensitive cells which would be destroyed if the full compliance of a potentiostat were brought to bear. Bubbles in a flow cell system can easily cause potentiostats to lose voltage control by blocking feedback to the instrument from the reference electrode. Without compliance limiting, a carefully prepared electrode will be ruined. With this feature, the user can simply select the maximum potential the counter electrode will be allowed to apply. When the limit is reached, it is clamped to the preset level. Compliance limiting guarantees safe operation even if control is lost.

Floating Working Electrode

In normal operation, the working electrode current return path is tied to chassis ground. However, there are times in which electrochemists wish to experiment with working electrodes that are intrinsically grounded (e.g., water pipes, rebar in concrete, an autoclave). Once the shorting bar from the rear panel of the instrument is removed, the ground return path floats, allowing these experiments.

The EC301 supports scan rates up to 10 kV/s. Potential, current and an auxiliary signal are all acquired simultaneously at 250,000 samples per second. Furthermore, an AC line detection circuit allows synchronisation of repetitive scans with the power line cycle.Fast Cyclic Voltammetry

Built-in Temperature Measurement

Temperature is a critical parameter in many battery, fuel cell and corrosion experiments, but it is often not recorded. Not knowing the temperature at which the data were acquired can make it difficult to compare your results. With a built-in input for a 100Ω platinum RTD, the EC301 makes it easy to acquire and plot temperature right along with the rest of your data.

Open Command Set

While our software supports all major electrochemical techniques, we realise that electrochemistry isn’t static. When a new technique or procedure is developed, the open command set lets experimentalists write customized software to support it. You can write in LabVIEW, MATLAB, or any other language.

Additional Information

Power Amplifier (CE)

Compliance voltage

±30 V

Maximum current

±1 A

Bandwidth

>1 MHz (10 kΩ load, <100 µA)

Slew rate

≥10 V/µs

CE limit

Limits counter electrode voltage when enabled

     Set range

±500 mV to

±30 V

     Bandwidth

1 MHz

Bandwidth limit

10 Hz, 100 Hz, 1 kHz, 10 kHz, 100 kHz, 1 MHz cutoff frequencies

Differential Electrometer (EC19 Module)

Input range

±15 V

Input impedance

>1 TΩ in parallel with 20 pF

Input bias current

<20 pA

Bandwidth

>10 MHz

CMRR

>80 dB (<10 kHz)

Potentiostat Mode

Applied voltage range

±15 V

Applied voltage resolution

500 µV (200 µV performing an automatic scan)

Applied voltage accuracy

±0.2 % of setting ±5 mV

Automatic scan rate

0.1 mV/s to 10 kV/s

Noise and ripple

<20 µVrms (1 Hz to 10 kHz)

Galvanostat Mode

Applied current ranges

±1 nA to ±1 A in decades

Applied current resolution

16-bit

Applied current accuracy

     1 A range

±0.5 % of reading ±0.2% of range

     All other I-ranges

±0.2 % of reading ±0.2% of range

Automatic scan rate

1 pA/s to 2 A/s

ZRA Mode

Voltage offset

CESense

and WE electrodes held within ±5 mV of each other

Voltage Measurement

Range

±15 V

Resolution

16-bit

Accuracy

±0.2 % of reading ±5 mV

Acquisition rate

4 µs (250 kS/s)

Current Measurement

Range

±1 nA to ±1 A in decades

Resolution

16-bit

Accuracy

     1 A range

±0.5 % of reading ±0.2% of range

     All other current ranges

±0.2 % of reading ±0.2% of range

Acquisition rate

4 µs (250 kS/s)

Analog Voltage and Current Outputs (front-panel BNCs)

Voltage output

±15 V output

    Accuracy

±0.2 % of V

RE

- VWE Sense

±5 mV

    Output impedance

50 Ω

    Max. output current

10 mA

    Filters

No filtering or 10 Hz low-pass

    Bias rejection

±15 V (full range)

Current output

±2 V

    Accuracy (1 A range)

IWE

within ±0.5 % of (V

BNC

x IRange

) ±0.2 % x IRange

    Accuracy (all other current ranges)

IWE

within ±0.2 % of (V

BNC

x IRange

) ±0.2 % x IRange

    Max. output current

10 mA

    Filters

No filtering or 10 Hz low-pass

    Bias rejection

±2 V (full range)

IR Compensation

Positive feedback

     Range

3 Ω to 3 GΩ (depends on current range)

     Resolution

1 mΩ (1 A range), 100 kΩ (1 nA range)

Current interrupt

     Switching time

<5 µs (1 kΩ resistive load)

     Interrupt duration

100 µs to 1 s

     Interrupt frequency

0.1 Hz to 300 Hz

EIS

Mode

Potentiostatic/Galvanostatic

Frequency range

1 mHz to 100 kHz

Dynamic range

120 dB

Sweep

Linear or logarithmic

Temperature Measurement

Sensor

100 Ω Pt RTD

Accuracy

±1 °C (-100 °C to +200 °C)

Rotating Electrode Output (front-panel BNC)

Range

0 to 10 V settable analog output

Accuracy

±1 % of setting ±5 mV

External Input (front-panel BNC)

Input range

±15 V (potentiostat mode), ±2 V (galvanostat mode)

     Potentiostat mode

1 V input corresponds to an applied voltage of 1 V

     Galvanostat mode

1 V input corresponds to an applied voltage of 1 A

Impedance

10 kΩ in parallel with 50 pF

Bandwidth

>1 MHz

ADD TO SCAN button

Adds the external input voltage to internally-generated scans

DIRECT CONTROL button

Takes the control voltage or current solely from the external input

Rear-Panel Inputs and Outputs

Timebase

10 MHz, 1 Vpp

Raw E

±15 V output

Raw I

±2 V output (1 V full scale)

CE / 3

±10 V VCE

/ 3 voltage output, 1 MHz bandwidth

Sync ADC

±10 V analog input

CI sync

TTL output for IR compensation

Scan trigger

Digital input. Falling edge begins automatic scan
Program E/I ±15 V input (sum of internal and external voltage programs)
ADC 1,2,3 ±10 V analog inputs (general purpose)
SRSLab Software

Communication interfaces

IEEE-488.2 and TCP/IP

Operating system

Windows

Measurements

Cyclic Voltammetry (CV)
Linear Sweep Voltammetry
Cyclic Staircase Voltammetry (Tast)
Square Wave Voltammetry
Differential Pulse Voltammetry (DPV)
Differential Normal Pulse Voltammetry (DNPV)
Timed Hold
Quartz Crystal Microbalance (QCM)
Electrochemical Impedance Spectroscopy (EIS)

General

Dimensions

17" × 5.25" × 19.5" (WHL)

Weight

26 lbs. 

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