ELC-01MX User Manual
version 2.6
page 10
In addition, using a toggle switch a bridge balance circuit can be activated to compensate for
the electrode artifact (BRIDGE mode, only in CC mode). With the same switch the
ELECTRODE RESISTANCE test mode is activated. The electrode resistance is measured
directly in M
Ω
and displayed on the POTENTIAL display.
4.3.2
Input configuration:
The amplifier has two inputs for VC and CC mode. The signal applied to the analog input
BNCs is converted either into a voltage command signal (x1 or x10 scaling) for the VC or
VCx10 voltage clamp modes, or to a current in the CC and BRIDGE mode. Besides this, a
signal generated from the 10-turn HOLD potentiometer can be transferred into a pulse using
the GATE TTL input BNC. This control can be also used as HOLDING potentiometer if the
switch in the GATE BNC is turned off.
4.3.3
Computer control of the mode of operation
In the EXT position of the MODE OF OPERATION switch the amplifier can be controlled by
a TTL signal connected to the MODE SELECT BNC (LO = CC, HI = VC).
4.3.4
Output configuration
The ELC-01MX amplifier has two output BNC connectors for POTENTIAL and one output
BNC for the CURRENT signal. The POTENTIAL OUTPUT x1 is a pure DC output that
monitors the electrode potential. The signal at the FILTERED OUTPUT can be high-pass
filtered (6 corner frequencies), amplified (x10/x100/x1000) and filtered by a 3 kHz low-pass
filter.
The current output signal is amplified (x1/x10/x100) and also passed through a 3 kHz low-
pass filter. All filters can be bypassed.
4.3.5
Digital displays
All ELC amplifiers are equipped with two digital displays, one for CURRENT (nA) and one
for POTENTIAL (mV) or ELECTRODE RESISTANCE (M
Ω
). The mode of operation is
indicated by a row of LEDs located close to the digital displays.
