Measurement-computing WaveBook rev.3.0 Uživatelský manuál stáhnout pdf (Strana 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, 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).

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