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Appendix G: Optional Interface 5000 Monitor Board--Connectors
E Monitor
The E Monitor BNC connector is the output of the Interface 5000'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 Interface 5000's floating ground.
Caution:
Ground. Connection of this BNC to a piece of earth-ground-referenced equipment can compromise the
Interface 5000'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.
I Monitor
The I Monitor BNC connector represents the output of the Interface 5000's current measurement circuit. With
the exception of the filtering described below, it is the raw signal. It has high bandwidth on the less-sensitive
current ranges. The effective bandwidth of the current signal falls as you reach the nA and pA current ranges.
IE Stability capacitors further slow the response.
The outer shell of this BNC connector is connected to the Interface 5000's floating ground.
Caution:
Ground. Connection of this BNC to a piece of earth-ground-referenced equipment can compromise the
Interface 5000'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.
RTD
The RTD jack is used to connect an RTD to the Interface 5000. The Interface 5000 continually samples the
RTD input during experiments when you select a stop-at test using a temperature variable.
Input (unlabeled)
The unlabeled input jack connects to the Interface 5000.
The shell of the E Monitor BNC is connected to the Interface 5000's Floating
The shell of the I Monitor BNC is connected to the Interface 5000's Floating
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