Measurement Computing StrainBook/616 - Manual (Page 84)

Calibration Using WaveView
Reference Note:
The Calibration Parameters Tab Selected section of Chapter 4 includes screen shots
and text related to the following steps.
1. Select ‘load cell’ or ‘transducer’ from the pull-down ‘Sensor Type’ menu.
2. Select ‘shunt’ from the pull-down ‘Calibration Method’ menu.
3. Enter a maximum intended value in the ‘Maximum Applied Load’ cell in engineering units.
4. Enter a value slightly below zero engineering units in the Quiescent/Tare cell in engineering
units.
Note: If the transducer must measure bi-directionally, for example, pressure and vacuum,
enter the maximum anticipated negative engineering units.
5. Enter the physical equivalence in engineering units in the ‘Point 2’ cell of the shunt calibration
resistance.
6. This method assumes the 0.00 engineering units already in the ‘Point 1’ cell is the intended
physical equivalence of the non-shunted transducer or load cell. [Possible exceptions are
atmospheric pressure transducers and load cells installed under load in which the relative
change is not the measurement of interest.]
7. Push the channel calibrate button and wait for the window verifying successful calibration.
CN-115-1 User-Configurable Plug-In Card Option
The CN-115-1 serves the same function as the CN-115 adapter plug discussed on page 6-4 and can be used for
all of the same bridge configurations detailed in the Configuration Diagrams section of this chapter. The CN-
115-1 can be populated with either standard axial lead resistors or square precision resistors.
Each StrainBook (and WBK16) channel has a on-board 2×8 resistor socket with rows designated A through H.
CN-115-1 is a removable plug-in board that can be pre-configured for various bridge options.
It will often be the case that both the top and bottom (plug-in) sides of the CN-115-1 card will need to have
resistors installed to create the desired bridge configuration. The configurations are illustrated earlier in the
chapter. In general, note that:
o
Half-bridge completion resistors consist of RG and RH (or RG1 and RH1).
o
Quarter-bridge completion resistors consist of RA, RC, and RE (or RA1, RC1, and RE1).
o
Shunt resistors consist of RB, RD, and RF (or RB1, RD1, and RF1).
Configuration examples, using different resistor types, immediately follows the installation section.
6-20 Bridge Configurations 929494 StrainBook/616 User’s Manual