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Description of the T8
2.2 Output signals
2.2.1 Analog
The T8 version 2005 has an internal microprocessor and offers water
tension and temperature as analog output signals plus the refilling
status as a digital signal.
Water tension and temperature are available as linear voltage
signals in a selectable range of 0...1 V, 0...2 V (default setting) or
0...5 V. Thus, the T8 are compatible to almost any data logger or
data acquisition system.
Furthermore, the measuring range itself can be set for special
measuring tasks. Standard is +100 kPa to -100 kPa and -30 to
+70°C.
The standard setting for the filling status is either switch "open" (0 V)
or "closed" (voltage signal equal to power supply voltage).
2.2.2 Digital
To change the settings of signal range or use the serial interface of
®
the T8 the tensioLINK
USB converter with Windows software
®
tensioVIEW
is available as an accessory.
Filling status as a Digital Status
If the indicator detects an air bubble the indicator switch closes and
the supply voltage is available on the output. If for example a LED
with a series resistor is connected, the LED will light up to indicate
the necessity of refilling. In addition, or instead, connect the signal to
a digital or analogue logger channel to record the filling status for
quality control of the matrix potential readings.
2.3 Serial interfaces
The T8 has two serial interfaces: the RS485 compatible tensioLINK
interface and SDI12.
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