'This program demonstrates the multiplier calibration with the following procedure:
' -- Simulate a signal from a water content sensor.
' -- Measure the 'sensor' signal.
' -- Calculate and apply an offset.
'
'You can set up the simulation by loading this program into the CR1000 and interconnecting
'the following terminals with a jumper wire to simulate a water content sensor signal as
' Vx1 --- SE1
'For the simulation, the value of the calibration standard and the initial 'sensor' signal
'are set automatically. Start the multiplier routine by setting variable CalMode = 1. When
'CalMode = 6 (occurs automatically after 10 measurements), the routine is complete. Note the
'new value in variable WCMultiplier. Now enter a new value in the simulated sensor signal
'as follows and note how the new multiplier scales the measurement:
' SimulatedWaterContentSignal = 350
'NOTE: This program places a .cal file on the CPU: drive of the CR1000. The .cal file must
'be erased to reset the demonstration.
'DECLARE SIMULATED SIGNAL VARIABLE AND SET INITIAL MAGNITUDE
Public SimulatedWaterContentSignal = 175 'mV, second setting is 700 mV
'DECLARE CALIBRATION STANDARD VARIABLE AND SET MAGNITUDE
Public KnownWC = 10 '% by Volume, second setting is 35%
'DECLARE MEASUREMENT RESULT VARIABLE.
Public WC
'DECLARE MULTIPLIER RESULT VARIABLE AND SET INITIAL MAGNITUDE
Public WCMultiplier = 1
'DECLARE VARIABLE FOR FieldCal() CONTROL
Public CalMode
'DECLARE DATA TABLE FOR RETRIEVABLE CALIBRATION RESULTS
DataTable(CalHist,NewFieldCal,200)
SampleFieldCal
EndTable
BeginProg
'LOAD CALIBRATION CONSTANTS FROM FILE CPU:CALHIST.CAL
'Effective after the zero calibration procedure (when variable CalMode = 6)
LoadFieldCal(true)
Scan(100,mSec,0,0)
'SIMULATE SIGNAL THEN MAKE THE MEASUREMENT
'Multiplier calibration is applied when variable CalMode = 6
ExciteV(Vx1,SimulatedWaterContentSignal,0)
VoltSE(WC,1,mV2500,1,1,0,250,WCMultiplier,0)
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