Measurement Computing WaveBook rev.3.0 - Manual (Page 72)

3-40 WBK16, WBK Expansion Options, ch03C 6-21-99 WaveBook User’s Manual
Displaying a Single Reading. In the WBK16 sensor calibration program, it is possible to take a single
reading and display it in the WBK16 Sensor Configuration window. First, click on the Channel Values tab.
Then click on the Take a Single Reading button on the tool bar, or choose Take a Single Reading from the
Calibration menu item.
Displayed readings are based on the most recent calibration. Changing the calibration parameters,
without calibrating the system, will not affect the channel values.
Channel Values Tab
Channel Values Tab
Channel Values, Simplified Block Diagram
The simplified block diagram (above) can be used to better understand the relationship of channel amplifiers and their
corresponding user interface columns (visible in the Channel Values Tab). These columns are represented in the tab
figure, and in the following table.
Column Display Description
Bridge (mV) The input value from the bridge. The value is in millivolts.
Input Gain The Gain setting of WBK16’s Input Amplifier. Any one of the following four settings is possible:
x1, x10, x100, or x1000.
Offset Null (Volts) The Voltage summed into WBK16s Scaling Amplifier. The voltage is to compensate for any
offset that is present in the sensor’s output. The Offset Null voltage is in the range of -3 to +3
volts.
Scaling Gain The Gain setting of WBK16’s Scaling Amplifier. Any one of the following 13 gain settings can
be used: 1.0, 1.28, 1.65, 2.11, 2.71, 3.48, 4.47, 5.47, 7.37, 9.46, 12.14, 15.58, or 20.0.
Normalize Scaling The Multiplier value applied to the A/D converter output for fine adjustment. The value range
for the Multiplier is 1 to 2.
Units Scaling The Multiplier value [used by the software] for converting sensor output voltage into User Units.
Units Offset The Offset value that is added to “Units Scaling” for fine adjustment of what will be the final
reading (Bridge Units).
Bridge (Units) The Reading (in User Units, for example: lbs, psi, kg) that results from converting the initial
sensor reading (Bridge mV).