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10
9
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Operation:
1:
4 digit display for readout.
2:
Dot matrix display for displaying units.
3:
Select button for confirmation of quantity cho-
sen.
4.
Adjustment buttons for calibration of pH ele-
ctrode using buffer solutions, selection of mea-
suring units for pressure, temperature and ele-
ctrode measurements.
5:
Connection jack for pressure sensors.
6:
BNC connector for pH electrodes (or Redox
electrodes)
7:
Connection jack for K-type thermocouples.
8:
Rotary switch for selection of physical quantity
to be measured.
9:
4 mm safety jacks for measuring voltage, cur-
rent, resistance and frequency.
10: Fuse holder for current measurements in mA re-
gion.
The instrument is separated into 4 galvanically iso-
lated components:
Temperature
pH and pressure
Voltage, current, resistance and frequency
Serial port
This means that the demonstration multimeter can
measure several parameters at once without chan-
ging connections. This can be useful in a setup
where the instrument is used to measure current and
temperature in turn (Joule’s Law experiment). This
also means that several measurements can be re-
corded on a computer at the same time if required.
The use of the instrument is very straightforward:
just turn the rotary switch to the desired parameter,
and the display will show it. The “Adjust” buttons
can then be used to switch among various units of
measurement (Celcius, Fahrenheit, Kelvin), pH
(pH/mV).
The apparatus is connected to AC power using the
power cable supplied.
®
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