Multichannel Systems nanoZ manual - Manual (Page 44)

nanoZ User Manual
40
Appendix
E:
Recalibration
The nanoZ does not require routine calibrations, however as of April 2012 there
are two optional recalibrations available. One will substantially improve the
accuracy and range of the impedance testing mode for nanoZ version 1.1 (and
may provide a marginal improvement in accuracy for version 1.2). This calibration
can also be used to compensate for errors in impedance measurement that may
otherwise be introduced by 3
rd
party electrode adaptors or extension cables (i.e.
the factory calibration assumes electrodes are plugged directly into the nanoZ).
A separate recalibration, applicable to both nanoZ versions, enables
electroplating currents less than 100nA with a resolution of ~1nA (±5nA or 5% or
better accuracy across the full voltage compliant current range).
For either calibration, start by inserting the NZ-CAL adaptor into
the nanoZ connector closest to the USB port, with the adaptor
orientated so that the ʻNZ-CALʼ text is on the left. For 3
rd
party
adaptor recalibration, plug the NZ-CAL into the end of the adaptor.
For accurate calibrations it is critical that the NZ-CAL be free of dirt, grease
(fingerprints), and moisture. Clean the adaptor with ethanol and wait for it to dry
completely before initiating any recalibration procedure.
Select Device | Calibration from the
main menu to open the calibration dialog:
(A) Select the serial number of the device
you wish to recalibrate.
(B) Click on Calibrate Plating or
Calibrate Impedance.
(C) Follow the onscreen instructions. You
will be prompted to save the existing
calibration data (including the factory
calibration) to a file. At the end of the
recalibration the new calibration data will
be automatically uploaded to the nanoZ.
After recalibrating we suggest you use the NZ-CAL adaptor to validate the
impedance measurement accuracy. To evaluate a plating recalibration observe
the voltage feedback in the nanoZ program while applying current to a known
resistor, or run the ʻelectroplating_test_precision.mʼ sample script in Matlab.
To save the existing calibration to file without doing a recalibration, click on
Backup calibration. To restore the factory calibration or revert to an earlier
recalibration, click on Restore calibration and select the desired calibration file.