Electrochemical Processor Model 1000

The Rank Brothers Electrochemical Processor comprises a high quality potentiostat and galvanostat. These are designed to be used for controlled potential and controlled current microelectrode techniques, respectively. The two circuits are completely separate enabling them to be used simultaneously.


The Potentiostat

The potentiostat circuit features:

  • Large dynamic range (0.01 to 100 µA).
  • Switchable active low pass filter to remove unwanted noise.
  • Current offset facility to enable small changes on a large background current to be easily monitored.

When used in the usual three electrode mode (i.e. working, reference and counter electrode) this device controls the voltage across the working electrode/counter electrode pair. The voltage (and therefore the current) is adjusted to maintain the potential difference between the working and reference electrodes, which is sensed through a high impedance feedback loop. The cell output provides a measure of the current that flows between the working electrode and the counter electrode.

This device is the basic instrument for the measurement of current at constant potential and, thus it will find direct application in techniques such as: amperometric titrations, electrogravimetry, coulometry (at constant potential), stepwise polargraphy and voltammetry. When coupled to a suitable signal generator, it can be used to perform a wide variety of polargraphic/voltammetric methods (including single sweep, single step, triangular wave, cyclic voltammetry/polarography).

When used in the two electrode mode (i.e. working and counter electrode) the potentiostat maintains a controlled potential difference between the two electrodes allowing the monitoring of any resultant current. If, as in many cases, the counter is also the reference electrode and substantially bigger than the working electrode, the system will function very similarly to a three electrode cell.


The Galvanostat

When used in the three electrode mode this device maintains a controlled constant current between the working electrode and the counter electrode. This allows the monitoring of the potential between the electrodes as a function of time (chronopotentiometry).

This device is the basic instrument for the measurement of potential at constant current and, therefore, finds direct application in techniques such as simple step chronopotentiometry, electrogravimetry and coulometry (constant current).

When used in two electrode mode the galvanostat maintains a controlled current between the two electrodes, which is often the situation needed when electroplating materials, e.g. Platinisation.


The System Monitor

The system monitor displays the outputs from the potentiostat and galvanostat on the voltmeter (i.e. plating voltage and cell output for the galvanostat and polarising voltage and cell output for the potentiostat). The Monitor contains two overload lamps indicating possible cell fault conditions.


Specifications

Galvanostat Controls

Current Range Selector Four position switch (1 to 1000 µA)
Plating Voltage Ten-turn potentiometer (-3 to +3 V)
Cell Selector Three-position switch (Test, 2, and 3 electrode)

Galvanostat Sockets

Electrode High-quality 5-pin DIN
Plating Voltage Output Insulated BNC (-10 to +10 V approx.)
Cell Output Insulated BNC (-10 to +10 V approx.)
Maximum Plating Current 15 mA approx.
Cell Output Accuracy Better than 3%

Potentiostat Controls

Cell Current Range Selector Four-position switch (0.1 to 100 µA)
Polarising Voltage Ten-turn potentiometer (-3 to +3 V)
Offset Current Range Five-position switch (Off, ±0.03 to ±30 µA)
Offset Current Adjust Ten-turn potentiometer (full range)
Cell Selector Three-position switch (Test, 2, and 3 electrode)

Potentiostat Sockets

Electrode High-quality 5-pin DIN
Polarising Voltage Output Insulated BNC (-3 to +3 V)
Cell Output Insulated BNC (-10 to +10 V approx.)
Cell Output Accuracy Better than 3%

System Monitor

Meter Accuracy Better than 0.5% full scale

General

Power Supply AC 110–120 V and AC 220–240 V versions available (power cord supplied)
Size 390 mm (width) × 220 mm (depth) × 200 mm (height)
Weight 7.0 kg

Rank Brothers Ltd reserves the right to change specifications in the light of continuing development.


Operating Manuals

These operating manuals are in PDF format. They can be opened in the free Adobe Acrobat Reader software.

Electrochemical Processor Model 1000 Manual


Ordering Information

Order Code Description
ECP001A Electrochemical Processor Model 1000

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