eDAQ EA168, Руководство пользователя

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22 Quad pH/mV Amp
37°C, or 65°C etc. MTC will alter the electrode response slope to suit
the new temperature on the basis of the Nernst equation.
Make sure that temperature compensation is enabled in the Temp.
Compensation check box by selecting
. The temperature at of
the sample data should be also be entered .
Automatic Temperature Compensation
When the temperature of the solution being measured is changing it is
necessary to perform automatic temperature compensation (ATC).
Using a suitable temperature probe and amplifier (for example the
eDAQ Thermocouple Pod) the temperature signal can be recorded on a
a spare e-corder channel. When the Automatic option is chosen, the pH
extension will use temperature data from one of the Chart channels to
correct the pH channel for variations in temperature. To choose the
automatic temperature compensation option click in the radio button
next to the Automatic option. The channel selection pop-up menu can
select the channel on which temperature was recorded.
Recording Temperature
To use a temperature channel for ATC, the channel must first be
appropriately calibrated, using the Units Conversion feature, with units
of °C, °F, or K. If you have not calibrated the temperature channel an
alert will appear,
Figure 3–9 , because the pH extension needs to know
these units in order to apply the Nernst equation.
Manual temperature compensation Automatic temperature compensation,
with temperature measured on channel 2
Figure 3–8
Selecting temperature
compensation