Calibration; Separate Ac Calibration For Each Interface 1000 Cable Type; Dc And Ac Calibration - Gamry Interface 1000 Operator's Manual

Calibration

You should calibrate each potentiostat installed in your system. A calibration script is provided with the Gamry
Framework.
The calibration for the Interface 1000 has been divided into two sections: DC Calibration and AC Calibration.
The calibration procedure is accessed via the Utility selection on the Framework's Experiment pull down
menu.

Separate AC Calibration for Each Interface 1000 Cable Type

The Interface 1000 now recognizes the type of cable connected to its cell connector. It maintains a separate
AC calibration table for each type of cable. The Gamry Framework will not let you use AC calibration data
recorded using a 60 cm shielded cable for experiments run using a Twisted Pair cable optimized for low
impedance EIS measurements.

DC and AC Calibration

These two procedures use an external resistive dummy cell.
The standard Interface 1000 calibration calls for an external resistive dummy cell. Your
Interface 1000 was shipped with a Universal Dummy Cell 4, which includes a 2 kΩ Ω Ω Ω ,
0.05% accurate resistor in the position marked "Calibration". After calibration, please
place this dummy cell in a safe place where you can find it if your unit requires
recalibration.
If you do need to recalibrate and you cannot find your Universal Dummy Cell 4, you can
perform DC Calibration using a different 2 kΩ Ω Ω Ω resistor. Its wattage is unimportant.
Some performance checks in the calibration process may fail if the resistors inaccuracy
exceeds 0.2% (4 Ω Ω Ω Ω ).
We do not recommend AC Calibration with any resistor other than the one on the
Universal Dummy Cell 4. The Universal Dummy Cell 4 was designed to separate the
working electrode leads from the counter and reference electrode leads. If you perform
AC Calibration without adequate separation between these leads, you will see phase shift
in your high frequency EIS data. 1.4 pF of stray capacitance across a 2000 Ohm resistor
causes a 1° ° ° ° phase shift at 1 MHz.
Potentiostat calibration is only required infrequently. You should recalibrate your Interface 1000 under the
following circumstances:
It has been about one year since your last calibration.
•
Your potentiostat has been serviced.
•
You notice breaks or discontinuities in the data curves recorded with your system.
•
The system is being run in an environment that is very different from the previous operating
•
environment. For example, if the Interface 1000 was calibrated at 15 °C and you are now
operating it at 30 °C, you should recalibrate.
Chapter 3 -- Installation--Calibration
CAUTION
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