Campbell 110PV, Инструкция по эксплуатации

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110PV Surface Temperature Probe
12
If your data acquisition requirements are simple, you can probably create and
maintain a datalogger program exclusively with
Short Cut
. If your data
acquisition needs are more complex, the files that Short Cut creates are a great
source for programming code to start a new program or add to an existing
custom program.
Short Cut cannot edit programs after they are imported and edited
in
CRBasic Editor
.
A Short Cut tutorial is available in Section 4 , Quickstart
(p. 2)
. If you wish to
import
Short Cut
code into
CRBasic Editor
to create or add to a customized
program, follow the procedure in Appendix A , Importing Short Cut Code
(p. A-1)
.
Programming basics for CRBasic dataloggers are provided in the following
sections. Complete program examples for select CRBasic dataloggers can be
found in Appendix B ,
Example Programs
(p. B-1)
. Programming basics and
programming examples for Edlog dataloggers are provided at
www.campbellsci.com\old-manuals .
If applicable, please read Section 8.3 , Electrical Noisy Environments
(p. 14)
, and
Section 8.4 ,
Long Lead Lengths
(p. 14)
, prior to programming your datalogger.
Measurement details are provided in Section 8.2 , Measurement Details
(p. 13)
.
7.6.1 Resistance Measurement
The CR6, CR800, CR850, CR1000, CR3000, CR5000, and CR9000(X) can
use either the BrHalf4W() instruction or BrHalf() instruction to measure the
110PV. The BrHalf4W() instruction reduces cable errors, but the BrHalf()
instruction requires fewer input channels.
A typical
BrHalf4W()
instruction is:
BrHalf4W( Dest,1,mV2500,mV2500,1,Vx1,1,2500,True ,True ,0,250,1.0,0 )
A typical BrHalf() instruction is:
BrHalf(
Dest,1,mV2500,1,Vx1,1,2500,True ,0,250,1.0,0
)
The CR200(X)-series dataloggers use the
ExDelSe()
instruction to measure the
110PV. The ExDelSe() instruction has the following syntax:
ExDelSE( Dest, Reps, SEChan, ExChan, ExmV, Delay, Mult, Offset )
A multiplier of 1.0 and offset of 0.0 should be used in the ExDelSe() ,
BrHalf4W()
, and
BrHalf()
instructions to provide a temperature in degrees
Celsius. For Fahrenheit, multiply the calculated Celsius temperature by 1.8
then add 32.
7.6.2 Converting Resistance Measurement to Temperature
The Steinhart-Hart equation is used to convert the resistance measurement to
temperature.
Temp_C = (1/(A+B*LOG(T110C*(LOG(T110PV_Res))^3))-273.15
NOTE