Omega RD260A instruction manual Explanation of Square Root

Page 61

Fmin

EXPLANATION OF SQUARE ROOT:

This recorder uses the following square rooting-method: Let us define the items as follows:

Vmin = minimum value of recording span (SPAN L) Vmax= maximum value of recording span (SPAN R)

= minimum value of scale (SQRT SCL L) Fmax = maximum value of scale (SQRT SCL R)

Vx	= input voltage
Fx	= scaling value

The relationship between Vx (input voltage) and Fx (scaling value) is as shown in the graph below (the graph configuration is approximate).

F

Fmax c

		b
		(Fmax – Fmin ) x 10%
Fmin	a	b'
	a	b'
		(V	– V	) x 1%
		max	min	V
	Vmin			V
	Vmin			Vmax

Between b and c in the graph, the following relation exists between Fx and Vx:

	Fx = (F max – Fmin )	Vx – Vmin	+ F min
		Vmax – Vmin

And between a and b, the relation is:

Fx = 10 (Fmax – Fmin ) (Vx – Vmin ) + F min

Vmax – Vmin

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Contents User’s Guide Servicing North America Introduction Alternative current Power SupplyNecessity of Protective Grounding Protective GroundingDefects of Protective Grounding and Fuse FuseChapters InstallationContents Setting A/D Integration Time Pen model Handling Precautions Before InstallationAccessories No. Name Qty Remarks Checking Accessories and AppearanceChecking and Unpacking Spare Parts NameRemoving Lock Screw and Packings for Transit Removing PackingsChecking Model Codes Checking Model CodesInstallation Site Installation Site and Mounting MethodsMounting Mounting MethodsPanel cutout External DimensionsRear Panel Terminal Arrangement WiringPen model Dot-printing modelPower Supply Wiring Power Supply WiringCrimp-On Lugs Input Signal WiringTC input Wiring for Input TerminalsRTD input Terminal BoardContact characteristics Alarm Output Wiring optionOutput type Output capacityInput characteristics Remote Control Wiring optionComponent Names and Functions Front Panel Power switch push-button typeKey panel push-key type Status Display Chart cassetteData Display Characters on the Display Switching Power On/Off MaintenanceInstalling or Replacing Chart Paper Prepare a new chart Simple replacement Installing or Replacing Pens Pen modelReplacement under pen-replacement mode Felt-tip penPlotter pen Installing or Replacing Ribbon Cassette Dot-printing model Getting the Recording Feeding the ChartStarting/Stoping the Recording Printing SamplesGetting a List Printout Getting a Digital PrintoutDot-printing model Printing Sample Getting a SET UP List PrintoutDisplay MAN except for the 1-pen model Selectting the DisplaySelecting a screen Periodic Maintenance MaintenanceIndication of Remaining Chart Length Fuse Replacement Battery ReplacementCleaning the Carriage Shafts Fuse ReplacementPen model CalibrationDot-printing model DC Voltage Signal for Pen model same as Dot-printing model Calibration procedureRequired instruments for calibration Recommended instrumentsReference Junction Compensation for Thermocouple Input Temperature Compensation for Thermocouple SignalAdjusting procedure Pen-Position Adjustment Pen modelDaily OPERATION/MAINTENANCE Figure a Dot-Position Adjustment Dot-printing modelDaily OPERATION/MAINTENANCE Data Setting Guides SET mode Operation modeSET UP mode Turning the function offDisp key Operation ModeSET Mode SET UP Mode Password Procedures to Enter Setting Data SET Mode Setting Input Range and Recording Span Range Key operation Skip SettingIndication Description Volt Input Ranges Display Voltage Measurement Setting Volt SettingTC Type Description and RTD Type Description Key operation Indication DescriptionDigital Input Setting DI Setting Difference Computation Setting Delt Setting Indication Discription Scale Setting SCL SettingKey operation Indication Discription Setting to Obtain Square Root Sqrt SettingENT key Explanation of Square Root Setting Offsets Offst Setting Alarms Alarm Is displayed and the setting is completed. Press Assigning Units Unit Chart Speed unit mm/h Setting Chart Speed ChartSetting Date/Time Clock FIX Auto Assigning Tags TAG Means ‘SPACE’ Setting Messages MSGSetting Key-lock KEY SET UP Mode Setting Procedure Setting Alarm Hysteresis On/Off Setting A/D Integration Time Pen model Select Using the key. Press the ENT key Display Appears Setting Upscale/Downscale TC BurnoutFilter works as follows Configuring the Input Filter Pen ModelBuffer data for Setting for Moving Average Calculations Dot-printing modelNth sample +1th sample Turning Offset Settings Protection On/Off To select Display, and press the ENT key Select Assigning Different Colors to Channels Dot-printing modelRecorder as Viewed from the Side Setting Pen Offset Compensation On/Off Pen model, /D1 optionUse Key to select the display Press the ENT key Turning Alarm Printing On/OffPen Model Chart Speed Setting Periodic Printout On/OffDot-printing Model Chart Speed Setting Procedure Turning Printing of Changes in Chart Speed On/OffSetting Procedure Selecting channel Number or Tag Select Using the key Press the ENT key. The display Appears Changing the Temperature Unit /D2 optionChanging Default Settings for Remote Operation option Turning the Settings Protection Function On/Off Initializing Settings Error Codes Error Code ListRecovery Store SET UP Settings Agaiin Self-diagnostic Message Printout MeaningsRecorder is completely inoperative TroubleshootingIs the input free of noise? Glitch is found other than the previously mentioned ploblems Warrant Y/ Disclaimer OMEGA…Of Course