PanelTemp (Panel Temperature)

The PanelTemp instruction is used to read the temperature of the datalogger main processing board wiring panel and output the value in degrees Celsius.

Syntax

PanelTemp ( Dest, fN1 )

The following program shows the use of the PanelTemp instruction.

Public PTemp

DataTable (Test,True,-1)
    DataInterval (0,1,Min,10)
    Sample (1,PTemp,FP2)
EndTable

BeginProg
    Scan (1,Sec,3,0)
      PanelTemp (PTemp,4000)
      Calltable (Test)
    NextScan
EndProg

Remarks

The measurement from the PanelTemp instruction does not accurately reflect the temperature of the wiring panel, since it measures the temperature of the main processing board. If the datalogger processor or charge (CHG) inputs are active, the PanelTemp measurement will be warmer than ambient. This should be taken into consideration if this measurement is used as a reference temperature for other measurements such as thermocouples.

The measurement from the PanelTemp instruction can be used as the reference temperature for thermocouple measurements.

Parameters

Dest (Destination)

The Variable in which to store the results of the instruction. Right-click the parameter to display a list of defined variables.

If this instruction has a Repetitions parameter and it is greater than 1, the results are stored in an array with the variable name. The array must be dimensioned large enough to hold all of the values returned from all of the Reps.

Type: Variable or Array

fN1

Determines the lowest frequency that will be eliminated or notched out by the sinc filter. This filter notches out frequencies at integer multiples of fN1 by averaging for a time equal to 1/fN1; thus, lower fN1 frequencies result in longer measurement times. Set fN1 to the lowest frequency that should be filtered out. For example, setting fN1 to 60 filters all multiples of 60 and above (60, 120, 180, etc.) but will not effectively filter lower frequencies; for example 30 Hz. Any value between 5 Hz and 93.75 kHz can be entered, but common options for filtering noise are: Any value between 0.5 Hz and 31.25 kHz can be entered, but common options for filtering noise are:

Option Description
50 Standard measurement speed; requires 50 msec to filter 50 Hz noise
60 Standard measurement speed; requires 50 msec to filter 60 Hz noise
400 Medium measurement speed; performs a 6.25 msec integration to filter 400 Hz noise
4000  Fast measurement speed; performs a 0.5 msec integration to filter 4000 Hz noise
Option Description
15000 Performs a 0.0667 millisecond integration (for fast measurements)
60 (or _60Hz) Performs a 16.67 millisecond integration (filters 60 Hz noise)
50 (or _50Hz) Performs a 20 millisecond integration (filters 50 Hz noise)

Type: Constant