Bio-Rad BioLogic LP System - Manual (Page 23)

If you are using a non-Bio-Rad fraction collector, use an SV-3 diverter valve to enable advanced features
such as collection by Threshold and/or Collection Windows. If this optional valve is not used, then only
Collect All is available.
2.6.2 Non-Bio-Rad Chart Recorders
A non-Bio-Rad chart recorder may be used with the BioLogic LP. A mini-DIN to banana plug cable (System
Cable 4) is used to connect the BioLogic LP Controller’s UV Chart port to the chart recorder. The input sig-
nal voltage should be set to 1V for both BioLogic LP UV and Conductivity signals.
The pin outs for the BioLogic LP’s UV Chart port are listed below and shown in Figure 8:
• Pin 1, Stop Paper: This pin is high (5 volts) when a method is running or when the BioLogic LP’s
Manual mode is used to make the chart recorder run. When the method ends, or Manual mode is
used to stop the chart recorder, the BioLogic LP pulls this pin “low” (0 volts) and the chart paper
stops feeding.
• Pins 2 and 3: Not connected.
• Pin 4, Integrator (+): This pin sends an unfiltered, unscaled signal to integrators or other data
acquisitions systems. An absorbance of 2 AU will cause a 1 volt signal at this pin, regardless of UV
Monitor range settings. When using this output, connect the negative lead to pin 7, Analog ground.
• Pin 5, Chart Recorder (+): This pin is connected to the positive lead of the chart recorder channel
1, which displays the UV absorbance trace. This signal is 0 volts when the UV Monitor reads 0 AU,
and 1 volt when the UV monitor reads “full scale”.
• Pin 6, Pen Lift: This pin is “low” (0 volts) when a method is running, or when the BioLogic LP
Manual mode is used to make the chart recorder run. When the BioLogic LP allows this pin to go
“high”, the pens lift from paper.
• Pin 7, Chart Recorder (–), analog/digital ground: This pin is connected to the negative lead of
the chart recorder channel, which displays the UV absorbance trace. It also serves as the negative
lead for the integrator signal and the negative connection for all digital signals on this connector.
• Pin 8: Not connected.
The pin outs for the BioLogic LP’s Cond Chart port are listed below and shown in Figure 8:
• Pins 1 – 4: Not connected.
• Pin 5, Chart Recorder (+): This pin is connected to the positive lead of the chart recorder’s chan-
nel 2, which displays the conductivity trace. This signal is 0 volts when the Conductivity monitor
reads the programmed “minimum” conductivity value, and 1 volt when the conductivity monitor reads
the programmed “maximum” value.
• Pin 6: Not connected.
• Pin 7, Chart Recorder (–), analog ground: This pin is connected to the negative lead of the chart
recorder’s channel 2, which displays the conductivity trace.
• Pin 8: Not connected.
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Description of Components