Omega RD260A Required instruments for calibration, Recommended instruments, Calibration procedure

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Calibration is a comparing operation between standard inputs and measured values. It is recommended to carry out a calibration once a year to assure the measuring accuracy.

Required instruments for calibration

The instruments for calibration should have the required resolution. If necessary, ask the sales office from whom you purchased the recorder about those instruments.

Recommended instruments

OMEGA model # CL511 calibrator

Calibration procedure

(1)Connect the instruments to the recorder; connecting the terminals is shown below. Give enough warm-up time to the instruments (more than 30 minutes for the recorder).

(2)Check that the ambient temperature and humidity are within the standard operating

conditions.

Standard operating conditions

Ambient temperature :		23±2 ˚C
Humidity	:	55±10% RH
Power supply	:	90 to 132 V AC, or 180 to 250 V AC
Power frequency	:	50/60 Hz±0.1%
Warm-up time	:	30 minutes or more

Mechanical vibration : Within the range not affecting recorder operation

However, when the calibration is conducted under normal operating conditions (see subsection 4.8.6), check the accuracy influenced by the conditions.

Chart paper yields thermal expansion or shrinkage, sometimes resulting in differences from the calibrated values.

Examples of expansion are shown below assuming the reference temperature 20˚C and humidity 65% RH: Expansion at 85% RH ..... 0.4% or less

Expansion at 35% RH ..... 0.45% or less

(3)Input the standard signals equivalent to 0, 50, and 100% of the setting range of the recorder, then check the difference error between input signals and measured values.

If the error is not within the specified accuracy, contact OMEGA Engineering.

NOTE A reference input for a thermocouple (TC) signal needs temperature compensation; the temperature at the recorder input terminal should be measured to make voltage compensation (adding) due to the reference junction temperature compensation.

Power terminals

–

1

2

L

N

+

3

+

–

DC voltage standard

Input terminals

(for DC Voltage or TC)

DC Voltage Signal for Pen model (same as Dot-printing model)

Temperature Measurement for Resistance Temperature Detector (RTD)

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Contents User’s Guide Servicing North America Introduction Alternative current Power SupplyFuse Protective GroundingNecessity of Protective Grounding Defects of Protective Grounding and FuseChapters InstallationContents Setting A/D Integration Time Pen model Handling Precautions Before InstallationSpare Parts Name Checking Accessories and AppearanceAccessories No. Name Qty Remarks Checking and UnpackingRemoving Lock Screw and Packings for Transit Removing PackingsChecking Model Codes Checking Model CodesInstallation Site Installation Site and Mounting MethodsMounting Mounting MethodsPanel cutout External DimensionsDot-printing model WiringRear Panel Terminal Arrangement Pen modelPower Supply Wiring Power Supply WiringCrimp-On Lugs Input Signal WiringTerminal Board Wiring for Input TerminalsTC input RTD inputOutput capacity Alarm Output Wiring optionContact characteristics Output typeInput characteristics Remote Control Wiring optionComponent Names and Functions Power switch push-button type Front PanelKey panel push-key type Chart cassette Status DisplayData Display Characters on the Display Switching Power On/Off MaintenanceInstalling or Replacing Chart Paper Prepare a new chart Felt-tip pen Installing or Replacing Pens Pen modelSimple replacement Replacement under pen-replacement modePlotter pen Installing or Replacing Ribbon Cassette Dot-printing model Printing Samples Feeding the ChartGetting the Recording Starting/Stoping the RecordingGetting a List Printout Getting a Digital PrintoutDot-printing model Printing Sample Getting a SET UP List PrintoutSelectting the Display Display MAN except for the 1-pen modelSelecting a screen Maintenance Periodic MaintenanceIndication of Remaining Chart Length Fuse Replacement Battery ReplacementFuse Replacement Cleaning the Carriage ShaftsCalibration Pen modelDot-printing model Recommended instruments Calibration procedureDC Voltage Signal for Pen model same as Dot-printing model Required instruments for calibrationReference 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 Turning the function off Operation modeSET mode SET UP modeDisp key Operation ModeSET Mode SET UP Mode Password Procedures to Enter Setting Data SET Mode Setting Input Range and Recording Span Range Skip Setting Key operationIndication 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 SettingSetting to Obtain Square Root Sqrt Setting Key operation Indication DiscriptionENT 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 ModelSetting for Moving Average Calculations Dot-printing model Buffer data forNth 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/OffSetting Periodic Printout On/Off Pen Model Chart SpeedDot-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 Code List Error CodesRecovery 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