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How do I use the DAS-TC/B in LabVIEW?
The DAS-TC/B can be used with the VIs for analog input for boards supported by
DriverLINX. When using thermocouples and desiring that the reported
measurements be in degrees of temperature, then the following must be done:
Configure the thermocouple channels in the DriverLINX Configuration Panel.
The screen capture below shows two channels configured for K type sensors and
reporting the value in Fahrenheit.
In LabVIEW, do not wire any values to the upper or lower limit terminals of the
VIs. When not wired, a value of zero is provided to the DriverLINX driver, which
will cause the board to be operated according to the settings in the DriverLINX
Configuration Panel (above).
If instead, you want to use the channels for voltage input, be sure to wire
appropriate values to the upper and lower limits to control the gain used by the
board. Since the DAS-TC/B is optimized for thermocouple measurements, its
analog input ranges are not symmetrically bipolar. This requires special attention
be paid to the value provided for the low limit. See the table below.
Gain Upper Limit (volts) Lower Limit (volts)
1 10 -2.5
125 0.080 -0.02000
166.7 0.060 -0.01500
400 0.025 -0.00625
If you wire an upper limit of +10 and a lower limit of