Accuracy of the PT100 measurements, Temperature C | Escort 3008B

17 Appendix

17.3.Accuracy of the PT100 measurements

The measurement inaccuracies thereafter are given as maximum values: typical values are 2 to 3 times less.

The measurement accuracy in temperature is the sum of several possible sources of inaccuracy: Pl: accuracy of standardisation

Pz: zero accuracy

Pm: accuracy of the measurement of the equivalent voltage

Pd: accuracy of the measurement offsets

The total accuracy is then: Pt = Pl + Pz + Pm + Pd

For the recorder:

Pl = 0.25 C for the PT100

Pz = 0.25 C for the PT100

Pd = 0.10 % of the offset

Pm = given in the tables

Measurement accuracy: Pm

The measurement accuracy Pm depends on the voltage range used by the appliance. The measurement error in degrees will then be the measurement error in voltage divided by the slope in V/C.

For all the voltage ranges, the accuracy is +/-0.1% +/- 10V.

Slope dependiing of temperature :

Temperature ( C)	-200	-100	0	200	400	600	800
Slope ( V/ C)	378	354	342	321	301	281	260

Equivalent voltage measurement accuracy at 0C :

Temperature	Tension	Max error	Max Error
Range	Range	( V)	( C)
20	10	20	0.06
50	20	30	0.09
100	50	60	0.18
200	100	110	0.32
500	200	210	0.60
1000	500	510	1.50
2000	1000	1010	3.00

EXAMPLE OF ACCURACY CALCULATION

The measurement is about 240C made with the 500C range, centered on 0C (non zero offset) with a PT100 probe.

Pt = Pl + Pz + Pm + Pd

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Escort 3008B, 3016B, 3004B user manual Accuracy of the PT100 measurements, Temperature C, Slope V/ C

Contents

Recorders Page Page Page Garanty Page Contents Diagrams Inputs / Outputs Appendix Page Symbols and definitions Important InformationSecurity instructions Important informations Symbols that appear in this manual Symbols that appear on the applianceSee chapter Technical specifications Conformity and restrictions of the appliance Presentation Presentation Presentation Rear side or top side Escort 3016B and Escort 3004B Front side Description of the screen Keys Thumb Wheel Updating the Internal Software F1 Modify Initialisation and Precautions of USE Initialisation Initialisation Storage precautions of the records Fuse Initialisation Power up of Escort 3008B Configuration on POWER-UP Initialisation Power up of Escort 3016B and Escort 3004B Measure of temperature with a PT100 Measure of temperature with a thermocoupleMeasure of voltage Measure of intensity Connection of the grounding Routine maintenance Calibration of the offsetsUnplug the appliance before any intervention Menu key Calibration Offset Factory adjustement Menu key Reload Factory Coeff Initialisation and precautions of use Mode key Use Help key Set up key Use Chart key Escort 3008B recorder only Channels set up key Analogical channels Use Use Logic channels Channel on/off key Display key Display Ft oscilloscope modeVertical or horizontal sweep on screen Use Direction keys Use Display XY Y channel Digital display Trigger key Replay key  Blocks and Files Start/Stop key Paper-feed key Diagrams Diagrams Positions of the channels Change diagrams Triggers TriggersTrigger key, parameters Start and Stop Single / Several thresholds Triggering with analogical channels Single threshold Triggers Several thresholds Triggers Trigger according to thresholds Triggers Trigger according to the slope Triggering with logical channels Definitions Mathematical CalculationsMathematical calculations Types of calculations Minimum MaximumLow High   V WidthCyclical RMS Configuration of the plotting Direct ModeDirect mode Direct mode Triggering plotting Direct mode Writing data Rearmament of the plottingExample of plotting program  Channels set up key Configuration Triggering of the acquisition Memory ModeMemory mode Manual with the F2 key Urge triggering Sampling periodTrigger Internal memory, blocks Triggering position Double Trigger mode Recording Memory mode Memory mode Memory output Memory mode Configuration and triggering of the acquisition 10. GO/NOGO Mode10 Go/Nogo mode Memory Mode Creation of the frame 10 Go/Nogo mode Use of the frame Channels for Go/Nogo selected in the Trigger Configuration and start of the acquisition File ModeFile mode Binary file LimitsAscii file File mode General File ManagementFile management Management of the configuration files Saving the configuration files File management Loading the configuration files Management of the acquisition filesPress the Load from disk key Saving the acquisitions Real time PC Software for Analysis File management Loading the acquisition files File management File transfer with FTP File management Display with Escortview File management ESCORTview Myfile.rec /x Plot set up and launch Replay , key Setup PlotPrinting with Escort 3016B and Escort 3004B Printing Printing Printer Setup Printing Supplementary input / output connector Inputs / OutputsInputs / Outputs Pin no Input or Ouput Logical inputs 13.1.1.UsePlotting and display External clock Alarm outputs Power supply outputKeyboard input 13.1.2.Use Mouse input XGA screen output14.8. RS232 Not used. Reserved to future applications USB Interface Ethernet RJ45 interface Interface Ethernet Ethernet InterfaceEthernet interface Format of the reception messages Programming languageSyntax of a reception message Syntax of a message unit Data Ethernet interface Format of the emission messages Standard instructions Text data Indication of the status of the appliance Structure of the status data Registers of service request Status register Validation register Registers of standard events Register of the alarms Using the structure of status data Example Setup Programming dictionary Ethernet interface Parameters of the channels CHAnnel Functions of the channels and between the channels Changing modeCurrent function Ethernet interface Chart Header Parameters Examples Directplot Triggerings Starttrig Ethernet interface Triggers Header Parameters Examples Triglog P1 Reloadings, real-time savings MEMSpeed Ethernet interface Launching plotting and recording RECord Ethernet interface Direct display Replay memory output Error messages Ethernet interface Service request Ethernet interface Technical Specifications Isolated inputs Sampling Technical specifications Temperature recordingBandwidth Multiplexed inputs Type of measurements Supplementary inputs / outputs Calibre Alarm outputs External power supplyPaper Display File acquisition Communication interfaceMiscellaneous Environmental conditions Escort 3008B Technical specifications Dimensions, weight Environmental conditions Escort 3016B & Escort 3004B Electromagnetic compatibility Accordance test Internal saving battery Accessory items 16.13.2 Optional accessory itemsItems furnished with the appliance 16.13.3 Expandable items Appendix Information about the ranges of the inputsAppendix Voltage-type inputs Appendix Thermocouple J type input Thermocouple K type input Appendix Thermocouple T type input Thermocouple S type input Appendix Thermocouple B type input Thermocouple E type input Appendix Thermocouple N type input Thermocouple W5 type input Accuracy of the thermocouple measurements Example of Accuracy Calculation Accuracy of the PT100 measurements Temperature CSlope V/ C Accuracy class index of class