Chapter 2 — The pH/mV Amp
11
connected pH/mV Amp, you should check the connections at this point,
quit the application, then open it again.
Choosing the pH Amp… menu command or clicking the button will
bring up the pH Amp dialog box, which replaces the Input Amplifier
dialog box for the channel (your
Chart
and
Scope Software Manuals
have details on the Input Amplifier dialog box).
Previewing the Signal
The pH Amplifier dialog box allows you to preview a signal so that you
can select the amplification, filtering and other settings. The dialog
boxes for Chart software are shown in
Figure 2–7
and
Figure 2–8
. The
Scope software controls are similar.
The incoming signal is displayed in real time, but is not recorded to
hard disk (once the signal moves across the display area it is lost). Click
the OK button to apply the selected settings.
Signal Display
The input signal is displayed so that you can see the effect of changing
the settings. The average signal value is displayed at the top left of the
display area. Slowly drifting signals (as from pH electrodes) will be
represented quite accurately, whereas quickly changing signals will be
displayed as a solid dark area showing only the envelope (shape) of
the signal formed by the minimum and maximum recorded signals.
You can stop the signal scrolling by clicking the Pause button at the top
right of the display area
. Click the Scroll button
to resume
scrolling.
Chart software
Scope software
Figure 2–6
Accessing the pH/mV
Amp controls
Summary of Contents for e-corder pH/mV Amp
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