ZAHNER-Elektrik GmbH & Co.KG
Thueringer Strasse 12
The HiZ probe set is specially designed for high impedance measurements. U- and I-probe come in two small boxes which can easily be placed near by the sample. By this, electrical noise artifacts are minimized. Typical applications are investigations on passive layers, oxydes, nitrides, dielectric films, ceramic substrates, low conductive electrolytes, lacquers, coatings, microelectrodes etc.
The HiZ Probe set is connected to the Probe I and the Probe E terminals of the IM6 or ZENNIUM. No additional hardware is needed.
|Potential range||±4 V, ±10 V|
|Frequency range||DC to 1 MHz|
|Leakage input current @ 25 °C||<12 fA|
|Current range (in decades)||±1 A to ±1 nA|
|Effective input capacity||±1 pF|
|Input resistance||> 1013 Ohm|
|Dimensions||130 x 60 x 30 mm
LoZ Cable Set
The LoZ cable set is specially designed for low impedance measurements. The symmetric geometry of the cables reduce the influence of mutual induction as much as possible.
The femto-Farad Probe works as a front-end to the IM6/Zennium-potentiostat. Apart from its limited current capability, all basic functionalities of the Thales software are supported. In particular impedance spectroscopy can be applied. Due to the fact, that the primary measurement magnitude is the complex impedance, besides the sample capacity, resistive and DC contributions can be determined as well.
|Frequency range||10μHz to 1 MHz|
|Current auto ranging, defeatable Current ranges||0 - ±40 nA
±40 - ±400 nA
±400 nA - ±4 μA
±4 - ±40 μA
|Voltage range||±4 V|
|Resolution of any range||18 Bit|
|Capacity offset||±1 fF *)|
|Capacity resolution||±0.1 fF *)|
|Capacity accuracy||±0.25 % of reading ±2 fF *)|
Noise based corrosion research using conventional electrochemical methods focus on the fact that the initial redox processes are related to the charge transfer of the metal dissolution deposition processes. Distinct areas of the object surface can be viewed as local galvanic elements that contribute to the total measured potential. Since many of these local elements are superimposed, the fluctuation of the potential (and the current, if the electrode is polarized) is low. Traditional electrochemical methods are based on this steady state" behavior. However, inhomogeneous corrosion attack, which is particularly important in the nucleation phase, does not conform to these conditions. Traditional methods such as impedance or Tafel techniques will fail for such inhomogeneous corroding objects, because the measurement signals become more and more noisy. In this case noise measurements quantify these discrete events that are disturbing the continuous methods.
For analysis, it is of great value to measure both current and potential noise. The problem is that measurement of current noise essentially requires a short circuit condition, whereas potential noise must be measured with a high impedance load. The standard method for solving this problem is to measure two identical systems, one under open circuit, the other under short circuit condition. A common experimental arrangement uses three identical electrodes, where one pair acts as a current noise source under short-circuit conditions, the second as a potential noise source under open circuit condition. One electrode acts as a common electrode.
This arrangement is often used in monitoring applications, and can be set up with the IM6 or ZENNIUM equipped with EPC42 + NProbe. However, this method has a significant disadvantage in that the measured current and potential noise do not come from the same electrochemical system. Even though it is assumed that the corrosion behavior of both systems is identical, the current and the potential are not correlated. This means that only the scalar rms values can be related, and vector operations like power calculation are meaningless.
Noise measures electrochemical voltage/current and correlated noise. For more information about correlated noise (CorrElNoise) see PDF dokument below.
Applications: Investigations on diffent kinds of corrosion.
Screenshot: Analyze noise data
Download a brochure about ZAHNER Noise software...
RV is a suitable tool for the investigation of high impedance systems. Although different applications can be seen, RV has been especially designed to meet the demands of the investigation of coated metals.
Application: Method for the evaluation of barrier coatings.
Download the manual about ZAHNER RV software...
The pulse probe is to be connected to the TR8M transient recorder extension card in a IM6 or ZENNIUM system.
|Ambient temperature||0 °C ... 25 °C|
If high potentials are to be applied and if high potentials are to be controlled and measured, higher compliance voltages are needed. For this reason, the IM systems can be upgraded with the CVB120 which provides a controlled voltage of up to ±100 V and a compliance voltage of up to ±120 V. The CVB120 is a booster which is to be connected to the buffer connectors of a IM6 or ZENNIUM.
|Operating modes||galvanostatic / potentiostatic|
|Compliance voltage||±30 V @ 300 mA
±120 V @ 75 mA
|Potential ranges||±4 V, ±40 V, ±100 V|
|Compliance voltage||">±15 V, ±120 V, ±120 V|
|Potential accuracy||±0.1 % of reading
±0.025 % fs of range
|Frequency range||DC to 100 kHz|
|Power consumption||75 W @ Ta|
|Ambient temperature||0 °C ... 25 °C|
High Impedance Measurements
Low Impedance Measurements
Low Capacitance Measurements
Noise & CorrElNoise Measurements
High Current Interrupt Measurements
Measurements with high compliance voltage
CVB120 (compliance voltage booster)...
Download the latest manual about ZAHNER HIZ Probe...
Download the latest manual about ZAHNER femto-Farad Probe...
Download the latest manual about ZAHNER Pulse Probe...
Download the latest manual about ZAHNER CVB120...