Overview

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 μm 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 offers a very wide dynamic range of 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 the contact resistance of connectors and relays for high current measurements. The 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 electronically instead of the inconvenient shipment of an EPROM chip.

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

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 to 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, integrated digital CV simulator, and an 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 model comparison 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.