ACQ16 USB Installation Manual
Calibration Dialog
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Units, High Unit and Low Unit, of measure should be set up. This calibrates the
channel to the actual user units and scaling. The system will now display, record, and
perform analysis directly in your units of measure. System defaults are: -5 Low Cal
= -5 Low Unit and +5 High Cal = +5 High Unit. Low and High Cal entries are
actual voltage values. The same defaults are present in the High Cal function. Also
see Low and High Units and Measure section.
Measure
In instances where there is offset on the input signal, the Measure function can
compensate for this offset. The software can Measure a Low or High Cal value, and
set that value to equal the entry in the Low or High Units cells.
If you have available an input calibration signal (voltage), it can be used to calibrate
the inputs. Double clicking on either the Low Cal or High Cal cell associated with
the channel will open a Measure dialog box as shown here. This function allows you
to manually enter a specific value that will be assigned to either the Low or High
Cal, or, by clicking the Measure button accept an external voltage that will set the
calibration of the signal conditioner channel to correspond to the external calibration
signal. Measure will enter any value that is being read at that time.
Low Units & High Units
The user can select the units he wishes to display. Combined with Low Cal and
High Cal, the user can set “x” value in Cal to equal “y” number of Units. Example:
If 2.500V is entered in the High Cal and 100 was entered in High Units, then 2.500
V = 100 units. Also see Measure Function.
Units
Units allow you to enter the actual engineering units being measured. The default is
Volts (V), but this may be changed to any engineering units. The User Unit input
field is limited to 9 characters.
Example: Suppose channel 4 is connected to a flow meter that outputs a voltage
proportional to the blood flow. To record this, input A4 will be configured in
Voltage Mode. Double clicking on the A4 Units cell will display a text box,
allowing you to enter "ml/S".
