NEISYSElectrochemical Impedance
Potentiostat Galvanostat Analyzer
Specification
Issue 03/2024 Rev. 1.35 by Novocontrol Technologies GmbH & Co. KG

Novocontrol Technologies GmbH & Co. KG
Aubachstr. 156410 Montabaur
Germany

Phone:FAX:
Email:
WWW+49 2602 919669 0+49 2602 919669 33
novo@novocontrol.de
http://www.novocontrol.deCopyright © Novocontrol Technologies GmbH & Co. KG, Germany

NEISYS EIS Analyzer

Specification

Contents
1 Technical Data..........................................................................................................................4
1.1 General..............................................................................................................................4
1.2 Environment......................................................................................................................4
1.3 Frequency Domain (Impedance) Mode.............................................................................4
1.4 Signal output I High..........................................................................................................5
1.5 Time Domain Mode..........................................................................................................5
1.5.1 Counter Electrode Polarization I High......................................................................5
1.5.2 Accuracy and resolution ac + dc...............................................................................6
1.5.3 Reference Voltage Inputs V High, V Low................................................................6
1.5.4 Working Electrode Current Input I Low...................................................................6
1.5.5 Main Control Loop....................................................................................................72 Impedance Measurement Ranges and Accuracy...................................................................82.1 Accuracy of Impedance Measurement with Option HAC................................................8
2.2 Accuracy of Impedance Measurement without option HAC............................................92.3 How to use the impedance accuracy specification..........................................................103

NEISYS EIS Analyzer

Specification

1 Technical Data
1.1General

Sample connections

4, 3 and 2 wire, I High, V High, V Low, I Low

System ground modes

Protective earth or floating for grounded samples

Voltage current modes dc and ac

Potentiostat, Galvanostat, and Direct VoltageSystem Interface

Ethernet (TCP/IP)Line voltage

100 – 240 V ac, 50 – 60 Hz

Power consumption< 30 W

Dimensions

330 mm * 215 mm * 90 mm (d/w/h)

Weight3.0 kg (3.3 kg including external power supply)

1.2

Environment

Operating temperature

0 °C to 40 °C

Storage temperature-10 °C to 60 °C

Specification limits

18 °C to 28 °C

Humidity< 60 %

1.3

Frequency Domain (Impedance) Mode

Frequency range(3 Hz, 3 mHz) 1 –(100 MHz, 50 MHz, 10 MHz, 1 MHz, 100 kHz) 2

Impedance range

10-4 Ω – 1012 Ω

Capacitance range

1 fF – 1 kF

Inductance range

100 nH – 1 kH

Basic Accuracy:3|Impedance|, |Capacity|, |Inductance| 0.1 % or 0.03 % 4Phase angle 0.03° or  4

Loss factor tan()5·10-4 or 1·10-4 4

1 Depending on Extended Functionality option EXF
2 Depending on Frequency option
3 For details, cf. the specification charts in Impedance Measurement Ranges and Accuracy.
4 Better values apply for devices with High Accuracy option HAC4

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1.4SpecificationSignal output I High

Voltage at max. current±10 V ac and dcCurrent in to grounded load±500 mA ac and dc

Min ac output voltage

2 Vrms

Output resistance

0.5 ΩFrequency accuracy

10-4 of selected frequency

1.5Time Domain Mode

Max. sample rate

107 or 106 samples/s 5Sample rate modes

Adjustable for each waveform ramp element
or fixed within experiment 6

Maximal scan rates

60 V/s or 2.5 A/s

Minimal pulse duration

0.1 s or 1 s 5

1.5.1 Counter Electrode Polarization I High
Voltage±10 Vp dc and / or ac max.

Output voltage ranges

0.1 V, 0.5 V, 1.1 V, 2.4 V, 5 V, 11 V

Accuracy and resolution ac + dc
Potentiostat Mode

Same as for V High, V Low voltage inputs

Direct Voltage Mode

0.1 % of output voltage range ±100 V
accuracy, 3·10-5 of output voltage range
resolution

Current±500 mAp dc and / or ac

5 Depending on Sample Rate Option
6 Depending on Extended Functionality option EXF5

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Specification

1.5.2 Accuracy and resolution ac + dc
Galvanostat Mode

Same as for I Low current input

Output Power

5 W max

Max. Internal Power Dissipation

500 mA max. current into shorted load
without overheat shutdown

Output Resistance

0.5 ΩBandwidthdc – 100 MHz

Galvanostat voltage limit

0 – 11VAccuracy

0.1 V

Potentiostat current Limit

5 mA – 500 mA

Accuracy(1 % or 0.1 % 7) of value

1.5.3 Reference Voltage Inputs V High, V Low
Configurations

Single or differential configuration

Voltage ranges±1.1 V, 11 V

DC Accuracy

10-4 of range + 10-3 of measured value

DC Resolution

10-6 of range

Input impedance> 1012 Ω | 10 pF

Input Bias Current< 1 pA

Bandwidthdc – 100 MHz

1.5.4 Working Electrode Current Input I Low
Current Ranges

5 nA – 500 mA in factors of 10

DC Accuracy

10-4 of range + 10-3 of measured value

Resolution

10-6 of range

Bandwidthdc – 100 MHz

1.5.5 Main Control Loop
Operation modes

Potentiostat, Galvanostat and Direct Voltage

dc accuracy

3·10-5 of range

Time constants

0.3 ms – 3 s in factors of 3.33

Bandwidthdc – 10 MHz

7 Depending on High Accuracy Option HAC

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Specification

2 Impedance Measurement Ranges and Accuracy
2.1Accuracy of Impedance Measurement with Option HACThe specifications below applies for•

Direct Voltage or Potentiostat modes•

Time constant 100 s•

No dc voltage or current•

Auto ranging for impedance measurements on,•0.5 s measurement timeAc sample voltage ±0.03 Vrms – 7 Vrms

•Sample connected to the front panel BNC terminals

Fig. 1: NEISYS impedance measurement accuracy with option HAC (high accuracy)
For impedance points in the areas between the lines of constant accuracy, the accuracy should
be interpolated from the neighboured lines of constant accuracy.
The labels within the inner areas show the accuracy inside.

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2.2Specification

Accuracy of Impedance Measurement without option HAC

The specifications below apply for•

Direct Voltage or Potentiostat modes•

Time constant 100 s•

No dc voltage or current•

Auto ranging for impedance measurements on,•Measurement time 0.5 s•

Ac sample voltage ±(0.01 – 7 Vrms)•Sample connected to the front panel BNC terminals

Fig. 2: NEISYS impedance measurement accuracy without option HAC (high accuracy).
For impedance points in the areas between the lines of constant accuracy, the accuracy should
be interpolated from the neighboured lines of constant accuracy.
The labels within the inner area shows the accuracy inside.

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2.3

Specification

How to use the impedance accuracy specification

Consider a measured impedance point Zm* represented by its absolute value |Zm*| and phaseangle m. The accuracy of Zm* can be defined by a percentage factor A with respect to |Zm*|
and a phase deviation .

Fig. 3: Definition of accuracy area in dependence ofamplitude and phase accuracy.
The true sample impedance Zs* is in the shaded area.
A and  depend on the frequency and impedance range of Zm*. They are shown in the diagramon the previous page as lines of constant accuracy. Each line of constant accuracy is labelled byan accuracy specification. The different labels have following meaning:Line Label

Accuracy Definition on Labelled Line

100% 180°

Limit of the available impedance range measured either by an open sample(top line) or a short sample (bottom line).

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Specification

Example:Consider a measured data point Zm* with |Zm*| = 1011 Ω at 1 Hz. It is located in the accuracy
diagram between the constant accuracy line 1 % 0.6° and 10% 6°. By logarithmic extrapolation
between the lines one gets the accuracy of about±3.3 % of |Zm*| for the |Zs*| absolute accuracy
and±2.2° for the absolute Zs* phase accuracy.
In addition to Zm*, the accuracy may be determined in the other representations measured
capacity Cm*, measured inductance Lm* or measured admittance Ym*. These quantities arerelated to Zm* byCm *=−jω Zm *(1)Lm*=

Zm *jω

(2)

Ym*=

1
Zm*(3)

with  = 2  frequency and j = imaginary unit.
As can be seen from the above equations, all conversion only affect the phase angle by constantshift of ±90° (Lm*, Cm*) or leave the phase angle unchanged (Ym*). Therefore the phaseaccuracy is the same for all four representations and the amplitude accuracy is only affected by
the absolute value of each representation. The corresponding lines for |Cm*| (linear decreasing
impedance with ) and Lm* (linear increasing impedance with ) are shown in the accuracy
specification. The lines for |Ym*| correspond to the horizontal lines for |Zm*| if inverted. Fromthese lines, the accuracy can be determined for all representations.

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