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The Power LED is on the lower right of the EIS Box front panel. It
normally glows a continuous blue when the EIS Box is turned on and has
passed some simple power-on tests.
When the Power LED is off, these are possible causes:
•
The Power switch is off.
•
There is no AC (mains) supply connected to the rear panel
Power In connector.
•
One of the internal DC power supplies has failed.
Cell Connectors
The EIS Box has two sets of eight cell cable connectors, for a total of 16
connectors on the front panel. Each connector is a 15-pin D-type
connector. Each pair of D-type connectors is a channel, for connection to
a cell or battery.
The upper (female) connectors are labeled Current Connector. They
carry the cell current between the Counter electrode wire and the
Working electrode wires.
The lower (male) connectors are labeled Sense Connector. They contain
only high-impedance inputs used to sense potentials in the cell.
In addition to the pins used for cell connections, each EIS Box Cell
Connector also uses four pins to read a cell cable ID. Gamry software can
compensate for the cell-cable characteristics to attain optimal system
performance in EIS (Electrochemical Impedance Spectroscopy).
A Channel LED is between each pair of Cell connectors.
The Channel LEDs glow amber whenever the EIS Box is actively applying
voltage or current to the electrochemical cell attached to that channel.
Avoid touching the cell cable leads whenever the Channel LED is lit,
because the quality of the data being collected in your experiment may
be compromised.
If you need to make changes to your cell leads, do so after powering
down the EIS Box.
In a typical experimental sequence, the Channel LED is off between
experiments and during any open-circuit potential measurements. It
glows amber whenever that channel's cell is polarized.
The front-panel System Ground black banana jack is intended for one
use only. When the EIS Box is used with cells isolated from earth
ground,connecting the System Ground to earth ground may lower the
noise measured in the system. Note that the chassis of the EIS Box is
isolated from the System (floating) Ground. Safety information
concerning this is in Chapter 1.
A banana plug is the only way you can connect to the Chassis Ground
jack. Use a wire to connect the banana plug to earth ground.
A black banana-plug-to-banana-plug lead is provided with your EIS Box.
You may find it useful when making this earth-ground connection.
Rear Panel
AC Input
The AC Input receptacle accepts a three-terminal AC line cord. You must
always use a line cord with a CEE 22 Standard V female connector on the
instrument end of the cable. The EIS Box derives all its power from your
local AC (mains). The input current is less than 2.1 A.
The AC Input jack is rated for operation from 100 to 240 V AC, at
frequencies from 47 to 63 Hz. It should therefore be useable worldwide.
The rear-panel System Ground black banana jack is intended for one use
only. When the EIS Box is used with cells isolated from earth ground,
connecting the System Ground to earth ground may lower the noise
measured in the system. Note that the chassis of the EIS Box is
connected to the Protective (earth) Ground. Safety information
concerning this is in Chapter 1.
Use a metal link to connect the Protective Ground to the System Ground
as shown above.
Protective Ground
The green Protective Ground binding post is a convenient access point to
the protective (earth) ground in the EIS Box. It is connected to the third
wire in the AC power cord and to the EIS Box's metal chassis. This
binding post can be connected to an additional earth ground to form a
redundant protective ground.
A black banana-plug-to-banana-plug lead is provided with your EIS Box.
You may find it useful when making the earth-ground connection (if a
redundant protective ground is required).
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