Gamry Instruments Interface 1010 - I Monitor Signal; E Monitor Signal

I/O Connectors
78
Table C-2
Monitor Connector
Pin
Name
Use
1
Signal Ground
A high-quality floating ground. Signals are relative to this ground
2
Signal Ground
Another high-quality floating ground. Signals are relative to this
ground
3
RTD Positive
The Positive RTD Input. 1 mA flows between this pin and Pin 4.
4
RTD Negative
The Negative RTD input. Connected to the Interface 1010’s floating
ground.
5
E_sig
E Monitor Signal, ±6.5536 V full scale
6
EXT_SIG
External Signal In, ±6.5536 V full scale
7
I_Sig
I_Monitor Signal, ±3.2678 V full scale
8
[not connected]
9
[not connected]
I Monitor Signal
The I Monitor signal represents the output of the Interface 1010 current measurement circuit. It can be treated
as a two-wire differential signal with the negative side connected to the Interface 1010 Signal Ground. With the
exception of the filtering described below, it is the raw signal with no offset or gain applied. The effective
bandwidth of the current signal falls as you reach the nA and pA current ranges. IE Stability capacitors further
slow the response.
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 signal is filtered using an RLC circuit. It has a bandwidth of approximately 150 kHz 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 1 kΩ in parallel with 47 pF.
E Monitor Signal
The E Monitor signal is derived from the output of the Interface 1010’s differential electrometer circuit. It can
be treated as a two-wire differential signal with the negative side connected to the Interface 1010 Signal
Ground. With the exception of the filtering described below, it is the raw voltage signal, with no offset or gain
applied. With the exception of the filtering described below, it is buffered representation of the voltage
difference between the white and blue cell cable leads.
Caution: The ground side of the I Monitor signal is connected to the Interface 1010
Floating Ground. Connection signal to an earth-ground-referenced apparatus can compromise the
Interface 1010’s ability to float, and invalidate data collected on earth-grounded cells.