4.2 LC-4C Rear Panel
This section describes features of the LC-4C’s rear panel (Figure 4.2).
Figure 4.2.
Rear panel of LC-4C detector.
CELL
The cell-lead cable is attached to this connector. Make certain the two components are prop-
erly aligned before making the connection. To make the connection, insert the cell-lead ca-
ble connector into this socket, until it snaps into place. Do not force this connection. When
two LC-4C’s are connected in DUAL mode, the detector connected to the longer cell lead
controls the W2 electrode. The W1 lead (of a dual cable) can be used for SINGLE electrode
applications, but the W2 lead CANNOT.
OXD/RDN SWITCH
The OXD/RDN toggle switch (to the right of the CELL connector) will reverse the polarity of
the output signal, thus changing the direction the pen moves on the chart recorder. DO NOT
reverse polarity by reversing the leads coming from the LC-4C. In general, the switch
should be up for oxidative work and down for reductive work. This will provide a positive-
going output voltage for oxidation or reduction reactions (a positive-going output is needed
for most integrators and computer workstations). Chart recorders can usually take negative-
going signals; when using two detectors, you may reverse one of the switches to have the
pens coming from different sides of the chart paper.
OUTPUT JACKS
These three banana-jack terminals (to the right of the OXD/RDN switch) feed the analog out-
put from the LC-4C to a recording device. The output signal is a voltage corresponding to
the amount of current produced at the working electrode. Two output voltages are provided.
Use the blue and black jacks for recorders requiring a 10 mV input, and the green and black
jacks for those requiring a 1 V input. BE SURE TO CHECK THE INPUT REQUIREMENTS
FOR YOUR RECORDER! To use both outputs simultaneously, you must join their ground
wires into a single connection to the black jack, or make a “Y” connector to split the black
jack into two leads. Alternatively, attach bare-wire leads to the appropriate OUTPUT connec-
tors on the terminal strip (see below).
1V
GND
10mV
OXD
RDN
REMOTE
CELL
REZERO
MARK
1V
10mV
EIN
GND
EAPP
GND
IGEN
GND
WGEN
GND
GND
GND
GND
EGEN
ADJ
A
I
B C D E F G H
J K L M N O P
LC-4C
Made in USA
REMOTE
OUTPUT
APP E
GEN
FUSE
PULL
Section 4. Operating the Electrochemical Detector
27
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