User manual - Chapter 3: Commands and Programming

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Chapter 3: Commands and Programming
Coefficient Parameter
This parameter specifies the coefficients of the calibration equation being
used. Two coefficients (a, b) are specified for the linear equation (ax + b),
while three coefficients (a, b, c) are specified for a quadratic equation (ax
2
+ bx
+ c).
CALIBRATE PROBE Examples
Example 1: Calibrating the light probe to a reference value
The light probe can perform sampling at a distance of one to four meters
from a light source. The following example uses a light source with a bright-
ness of 800 at one meter and 200 at four meters, to produce calibration
values based on changes in brightness between those two points.
{1,0}→List 6↵
Send(List 6)↵
{1,1,1}→List 6↵
Send(List 6)↵
ClrText↵
”HOW MANY POINTS”?→N↵
Seq(0,X,1,N,1)→List 2↵
Seq(0,X,1,N,1)→List 3↵
For 1→I To N Step 1↵
ClrText↵
”ENTER BASE VALUE”?→B↵
B→List 2[I]↵
{3,0.01,5,0,0}→List 6↵
Send(List 6)^
Receive(List 4)↵
(Sum List 4-Min(List 4)-Max(List 4))÷3→List 3[I]↵
Next↵
LinearReg List3,List2↵
”FINISHED”↵
”A=”:a^
”B=”:b↵
Values a and b obtained by this program can be set using Command 9 before
performing actual sampling.
{9,Channel,1,a,b}→List 6
Send(List 6)
Specifies light probe connected to Channel
1 (CH1).
Calibration of probe for two-point data for
this example.
Input of reference value. At this time, light
probe should be in state that will be experi-
enced during sampling.
(display halt)
(display halt)
(“Channel” is the specification of the chan-
nel to be used for sampling.)