A l p ha ­ A M o d ul a r
M e a s u r e m e n t Sy s t e m• Test Interface for Dielectric, Conductivity,Impedance Spectroscopy in two­electrodeconfiguration and Gain Phase Measurements forthe Alpha­A Modular Measurement System• Very wide frequency range: 3 µHz to 40 MHz• Extremely wide impedance range:
10 mΩ to 100 TΩ, i.e., 16 decades.
• Excellent phase and tan() resolution andaccuracy• Connects your own sample cells to the Alpha­Asystem• Recommended for usage with BDS 1200 sample
cell (not included)

Novocontrol Technologies
GmbH & Co. KG
Aubachstr. 156410 Montabaur
Germany
Phone: +49 2602 9196690
Fax:+49 2602 91966933
e­mail: novo@novocontrol.de
web: http://www.novocontrol.de

ZG2

ZG2 Test Interface for theNOVOCONTROLZG2 Test Interface
The ZG2 test interface for the Al­
pha­A modular measurement sys­
tem features high quality general
purpose dielectric, conductivity, im­pedance spectroscopy in two­pointmode as well as gain­phase mea­
surements. Its highlights are the ex­tremely wide impedance range
and the impressive loss­factor reso­
lution and accuracy.
The ZG2 is the two­wire economicalalternative of the ZG4 test interface.
It has the same functionality as theZG4, but lacks the three­ and four­electrode measurement options,
supporting only two­ electrodemeasurements.
The ZG2 exhibits top­class general
purpose performance; it isparticularly recommended for• dielectric or conductive material
samples in combination with theNovocontrol BDS 1200 parallel
plate sample cell;• passive customer home­built two­electrode sample cells;• electronic components or materi­als.
The ZG2 can be combined with anytype of sample cells or devices intwo­wire mode via its front­panel
BNC connectors. A sample cell is
not included. For measurements onmaterials, the passive Novocontrol
Technologies BDS 1200 sample cellwith shielding unit BDS 1230 is re­commended.
The external interface design allows
positioning the ZG2 test interface
close to the sample or device undertest, thus minimizing cable effects
due to, e.g., cable induct­ anceand subsonic noise which may influ­
ence the results in the the high andlow frequency ranges, respectively.

ZG2ZG2 Specifications:
RangesFrequency: 3 µHz ... 40 MHz (13.1 decades)*Impedance: 10­2 .. 1014 Ω (16 decades)
Capacitance: 1 fF ... 10 F (16 decades)
Loss factor tan(δ): 10­5 .. 104
AC signal out:
100 µV .. 3 Vrms
DC bias out:­40 VDC .. +40 VDC, 70 mA max**
Signal generator output impedance: 50 Ω
Voltage input: < ± 4.3 Vp dc or ac coupled
Base Accuracy
Relative Impedance, Relative Capacity,
Loss factor tan(δ): < 3.10­5 ***Phase Angle:< 0.002° ***Resolution
Relative Impedance, Relative Capacity,
Loss factor tan(δ): < 10­5Phase Angle:< 0.0006°
User Calibrations:load, short, open, internal self calibration anddiagnostics* in combination with the Alpha­A mainframe type AT** requires dc bias option B of the Alpha­A mainframe*** for details refer to specification charts

Test Interface Recommendation
Select the ZG2 test interface for your Alpha­A
modular measurement system if you• need the flexibility of connecting other samp­les or devices via BNC connectors• do not need the particular features of theZG4 test interface (i.e., additional three­ andfour­point measurement option, voltage
channels with driven­shield technology)
If the focus is entirely on materials measure­ments, the ZGS active cell interface provides
slightly better performance than the combinati­
on of ZG2+BDS 1200 and should be preferred.
System requirements• Impedance analyzer mainframe Alpha­A