E Monitor Bnc; Ext. Sig. In Bnc - Gamry Instruments Reference 3000 Operator's Manual

Caution:
Ground. Connection of this BNC to a piece of earth-ground-referenced equipment can compromise the
Reference 3000's ability to float, and invalidate data collected on earth-grounded cells.
Scaling on this signal is 3 V for  the nominal full scale current on the selected current range. Cathodic
currents cause a positive output voltage. If the software is auto-ranging the current-range selection, this signal is
discontinuous at each range change.
The I Monitor BNC connector is lightly filtered using an RLC circuit. It has a bandwidth of approximately
3 MHz when connected to a high-impedance input. This bandwidth is further reduced if a coaxial cable is
connected to the BNC. Its output impedance is approximately 200 Ω in parallel with 220 pF.

E Monitor BNC

The E Monitor BNC connector is the output of the Reference 3000's differential electrometer circuit. With the
exception of the filtering described below, it is a buffered representation of the voltage difference between the
white and blue cell cable leads. It has a high bandwidth.
The outer shell of the BNC connector is connected to the Reference 3000's floating ground.
Caution:
Ground. Connection of this BNC to a piece of earth-ground-referenced equipment can compromise the
Reference 3000's ability to float, and invalidate data collected on earth-grounded cells.
The E Monitor BNC connector is lightly filtered using an RLC circuit. It has a bandwidth of approximately
3 MHz when connected to a high-impedance input. This bandwidth is further reduced if a coaxial cable is
connected to the BNC. Its output impedance is approximately 200 Ω in parallel with 220 pF.

Ext. Sig. In BNC

The Ext. Sig. In BNC connector allows you to add a voltage to the Reference 3000's signal generator. This
signal is summed with the other signal-generator sources, including the IR DAC, the Scan DAC, and the DDS
output.
The outer shell of the BNC is connected to the Reference 3000's floating ground.
Caution:
Ground. Connection of this BNC to a piece of earth-ground-referenced equipment can compromise the
Reference 3000's ability to float, and invalidate data collected on earth-grounded cells.
The signal generator output is usually directly connected to the potentiostat's input. When the cell is turned on
in potentiostat mode, the feedback is such that a negative signal-generator output creates a positive differential
electrometer signal, which corresponds to a negative working electrode versus reference electrode voltage.
Panel Indicators and Connectors – Rear Panel
The shell of the I Monitor BNC is connected to the Reference 3000's Floating
The shell of the E Monitor BNC is connected to the Reference 3000's Floating
The shell of the Ext. Sig. In BNC is connected to the Reference 3000's Floating
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