eDAQ Picostat, Руководство пользователя

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48 eDAQ Potentiostats
Connecting the QuadStat
Your QuadStat will have been supplied with an I
2
C cable (DB–9 pin
connectors at either end), and nine cables with BNC connectors at one
end and bare wires at the other.
First make sure that the e-corder is turned off. Then connect the I
2
C
cable to the I
2
C connector on the back panel of the e-corder , and the
other the other end to the I
2
C Input connector on the back panel of the
QuadStat.
The QuadStat provides two signals per channel: the potential signal
(E Out) indicating the potential difference between the working and
reference electrodes; and the current signal (I Out) indicating the
current flow between the working and auxiliary electrodes. Use the
BNC cables, with bare wires at one end, to connect the terminal strip
(
Figure 4–3 ) as described in Table 4–2 and Figure 4–5 or Figure 4–6 .
Note there are several possibilities depending on how many of the
QuadStat channels you wish to use and whether you require the use of
the
e-corder Output, or an external waveform generator.
For experiments where the working electrode potential is held constant
(between ±2.5 V) the E In pin positions are unused,
Figure 4–5 . If the
electrode potential required is greater than ±2.5 V, or is to be pulsed
or ramped during the experiment, then the E In input must be connected
to a suitable external signal, such as from the Output of the
e-corder , or
a waveform generator, Figure 4–6 . If an e-corder is used, then normally
connect to Output –. With these connections, when you use the
software to set a more positive voltage, a more oxidising potential will
QuadStat rear panel e-corder front panel
I Out (Ch 1, Ch 2, Ch 3, Ch 4) Input 1, 3, 5, 7
E Out (Ch 1, Ch 2, Ch 3, Ch 4)* Input 2, 4, 6, 8
E In
†
Output –
‡
* It is not always necessary to monitor E Out depending on your experimental requirements.
†
Connections to E In are only required if using an external waveform to control the applied
potential.
‡
Use to send a signal of reverse polarity to the QuadStat.
Table 4–2
QuadStat to e-corder
BNC connections. See
Figure 4–7 for actual
appearance.