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Model CHI600D Series Potentiostat

The Model 600D series is designed for general purpose electrochemical measurements. The figure below shows the block diagram of the instrument. The system contains a fast digital function generator, high speed data acquisition circuitry, potentiostat, and a galvanostat (available only in select models). The potential control range is 10 V and the current range is 250 mA. The instrument is capable of measuring current down to tens of picoamperes. The steady state current of a 10 mm disk electrode can be readily measured without external adapters. With the CHI200B Picoamp Booster and Faraday Cage (fully automatic and compatible with the CHI600D series), currents down to 1 pA can be measured. These instruments are very fast. The function generator can update at a 10 MHz rate, and the maximum sampling rate is 1 MHz at 16-bit resolution. The instrument provides very wide dynamic range on experimental time scales. For instance, the scan rate in cyclic voltammetry can be up to 1000 V/s with a 0.1 mV potential increment or 5000 V/s with a 1 mV potential increment. The potentiostat/galvanostat uses a 4-electrode configuration, allowing it to be used for liquid/liquid interface measurements and eliminating the effect of contacting resistance of connectors and relays for high current measurements. Multiple data acquisition systems allow an external input signal (such as spectroscopy signals to be recorded simultaneously with electrochemical data). The instrument will also automatically re-zero both potential and current, so that periodic re-calibration of the instrument can be avoided.

 

 

 

The 600D series is the upgrade to our very popular 600/600A/600B/600C series. The instrument utilizes FLASH memory, allowing instrument updates to be distributed by e-mail instead of the shipment of an EPROM chip.

The 600D series has a serial port (default) and a USB for data communication with the PC. You can select either serial port or USB (but not both) by changing the jumper setting on the board.

The 600D series also includes a true integrator for chronocoulometry.

A 16-bit highly stable bias circuitry is used for current or potential bias. This allows wider dynamic range in ac measurements. It can also be used for re-zero the dc current output.

The model 600D series can be upgraded to a bipotentiostat. The model 700D series will be an add-on board to the 600D series. It will therefore be identical to the 600D series when used for single channel measurements. When it is used as a bipotentiostat, the second channel can be controlled at an independent constant potential to scan or step at the same potential as the first channel, or to scan with a constant potential difference with the first channel. The second channel is available for many voltammetric and amperometric techniques.

The instrument also provides various electrochemical techniques, Windows-based software, and integrated digital CV simulator, impedance simulation and fitting program. These features provide powerful tools for both electrochemical mechanistic studies and trace analysis.

We provide several different models in the 600D series. The following table compares the different models. Other than what is listed, the specifications and features of these models are identical. Models 600D and 610D are basic units for mechanistic study and electrochemical analysis, respectively. They are also great for teaching purposes. Models 602D and 604D are for corrosion studies. Models 620D and 630D are comprehensive electrochemical analyzers. Models 650D and 660D are advanced electrochemical workstations.

Specifications

 

 

Potentiostat

Galvanostat (Model 660D)

Potential range:  -10 to 10 V

Potentiostat rise time:  < 1 μs

Compliance voltage:  12 V

3- or 4-electrode configuration

Current range:  250 mA

Reference electrode input impedance:  1x1012 ohm

Sensitivity scale:  1x10-12 - 0.1 A/V in 12 ranges

Input bias current:  < 50 pA

Current measurement resolution:  <  0.01 pA

Minimum potential increment in CV:  100 μV

Potential update rate:  10 MHz

Fast data acquisition: 16 bit @ 1 MHz

External signal recording channel

Automatic and manual iR compensation

Automatic potential and current zeroing

Flash memory for quick software update

Serial port or USB selectable for data communication

CV and LSV scan rate:  0.000001 to 5000 V/s

Potential increment during scan:  0.1 mV @ 1000 V/s

CA and CC pulse width:  0.0001 to 1000 sec

CA and CC Steps: 320

True integrator for CC

DPV and NPV pulse width:  0.001 to 10 sec

SWV frequency:  1 to 100 kHz

ACV frequency:  0.1 to 10 kHz

SHACV frequency:  0.1 to 5 kHz

IMP frequency:  0.00001 to 100 kHz (extend to 1MHz for impedence 10-1000 ohm)

IMP amplitude:  0.00001V to 0.7V RMS

Potential, current low-pass filters, covering 8-decade frequency range, Automatic and manual setting

RDE rotation control voltage output:  0 - 10 V (Model 630D and up)

Cell control: purge, stir, knock

Maximum data length:  128K-8192K selectable

Dimension:  14.25(W) x 9.25(D) x 4.75(H)

Weight: 12 Lb.

 

 

Square wave voltammogram.

 Amperometric i-t Curve.

 


 

Differences Between 600D Series Models

 

Functions

600D

602D

604D

610D

620D

630D

650D

660D

Cyclic Voltammetry (CV)

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Linear Sweep Voltammetry (LSV) &

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Staircase Voltammetry (SCV) #,&

 

 

 

 

 

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Tafel Plot (TAFEL)

 

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Chronoamperometry (CA)

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Chronocoulometry (CC)

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Differential Pulse Voltammetry (DPV) #,&

 

 

 

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Normal Pulse Voltammetry (NPV) #,&

 

 

 

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Differential Normal Pulse Voltammetry (DPNV)#,&

 

 

 

 

 

 

 

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Square Wave Voltammetry (SWV) &

 

 

 

 

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AC Voltammetry (ACV) #,&,$

 

 

 

 

 

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2nd Harmonic AC Voltammetry (SHACV) #,&,$

 

 

 

 

 

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Amperometric i-t Curve (i-t)

 

 

 

 

 

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Differential Pulse Amperometry (DPA)

 

 

 

 

 

 

 

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Double Differential Pulse Amperometry (DDPA)

 

 

 

 

 

 

 

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Triple Pulse Amperometry (TPA)

 

 

 

 

 

 

 

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Integrated Pulse Amperometric Detection (IPAD)

 

 

 

 

 

 

 

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Bulk Electrolysis with Coulometry (BE)

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Hydrodynamic Modulation Voltammetry (HMV)

 

 

 

 

 

 

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Sweep-Step Functions (SSF)

 

 

 

 

 

 

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Multi-Potential Steps (STEP)

 

 

 

 

 

 

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AC Impedance (IMP)

 

 

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Impedance - Time (IMPT)

 

 

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Impedance - Potential (IMPE)

 

 

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Chronopotentiometry (CP)

 

 

 

 

 

 

 

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Chronopotentiometry with Current Ramp (CPCR)

 

 

 

 

 

 

 

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Multi-Current Steps (ISTEP)

 

 

 

 

 

 

 

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Potentiometric Stripping Analysis (PSA)

 

 

 

 

 

 

 

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Electrochemical Noise Measurement (ECN)

 

 

 

 

 

 

 

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Open Circuit Potential - Time (OCPT)

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Galvanostat

 

 

 

 

 

 

 

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RDE control (0-10V output)

 

 

 

 

 

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Full version of CV simulator

 

 

 

 

 

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Limited version of  CV simulator

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Impedance Simulation and fitting

 

 

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iR Compensation

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External Potential Input

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Auxiliary Signal Measurement Channel

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#:  Corresponding polarographic mode can be performed.

&: Corresponding stripping mode can be performed.

$:  Phase selective data are available.

 

 

Cyclic voltammogram at 1000V/s.

 Phase selective second harmonic AC voltammogram.

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