Emerson Process Management CI-9110 Setting Output Limits, General Principles, Test Setup

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5.3 SETTING OUTPUT LIMITS

5.3.1 General Principles

The Regulator provides mechanical output limits that prevent the output from underranging or overranging the process. When the Command Input is of a value that causes the stepper motor to drive against a limit, the clutch will allow the driveshaft to slip. After the motor has completed several revolutions, the software will turn it OFF to prevent clutch wear. The motor will remain OFF until the Command Input signal returns to a value that is within the set limits.

5.3.2 Test Setup

When a Remote Set Regulator leaves the factory, the low limit is set to about -10% below the minimum range value, and +10% above the high range value. These limits may be changed in the field if the user has the capability to adjust the dc input signal over the full range of the Regulator and to monitor the pressure output. Bench calibration setups similar to that shown in Figures 5-2 or 5-3 may be used to set the mechanical limits on Analog or Raise/Lower models. The DMMs (digital multimeters) shown in both illustrations are not required for setting limits.

5.3.3 Procedure

The method of setting the mechanical Hi and Lo Limit adjustments are described as follows:

1.Check that pressure supply to Remote Set Regulator is at proper value. Turn off dc power source (12 or 24 V dc) to Remote Set Regulator and remove Regulator Cover.

2.For all models, set switch SW2-6 to CLOSE to disable the Guard input.

3.For Analog models, set jumpers W1 and W2 for Fail/Hold mode. See Section 3, Board Setup. Turn ON dc power source.

4.Locate two limit adjustment tangs on main gear assembly. Refer to Figure 5-1.

5.Adjust dc test input level to approximately -20% below minimum range value. Pressure output will fall to a minimum value and remain there.

6.If limit tangs were previously set at factory their positions on main gear will appear about as shown in Figure 5-1. If tangs are at different positions, other limit values may have been field-selected.

7.Turn off dc power. Limits are set by estimating positions on main gear assembly. To set a limit, slightly lift edge of tang from teeth of main gear and carefully move tang to ap- proximate desired position. Release tang to lock its position. If access to a tang is blocked, re-apply dc power and adjust dc input level to a value that will rotate main gear in a direction to make tang accessible. Turn off dc power and set limits as required.

CI-9110

5-3

Service

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Contents Remote Set Regulator Model 9110-00A IMPORTANT! Read Instructions Before Starting Warranty Bristol Inc MailPhone Bristol Inc. Repair Authorization Form off-line completion Training 860 860 945-2213 FAX Telephone Support Technical QuestionsVisit our Site on the World Wide Web Training Courses Model 9110-00A Remote SET Regulator Supplemental Instructions Theory of Operation Product DescriptionAnalog Regulator Model Remote Set Regulator Block Diagram of Analog Type Regulator Current Output Guard InputBlock Diagram of Raise/Lower Type Regulator Raise/Lower Regulator Model Data PlateModel Number Breakdown = Pneumatic Output = Mounting Arrangement Page In-Line Mounting GeneralMounting Two-Inch Pipe MountingGeneral Piping Pressure ConnectionsMoisture in Lines Regulator AssemblyBody and Cover Internal AccessLine Size VentingElectrical Conduit Port Safety NotePage Cradle Switches with Open Designation Using Option SwitchesSlide Switches with on Designation RAISE/LOWER Input Models Switch FunctionsRegulator Assembly Switch SW1 & SW2 Functions & Settings Analog Input ModelsIncremental Signal Continuous SignalInput Filter Switch SW1 1-5, Pulse IncrementsGuard Logic Guard InputOutput Rate of Change Static or Dynamic Guard InputAnalog Failure Modes Fail Hold & Fail Zero Switch SW2 2-5, Output Rate Of ChangeFAIL-ZERO Mode Page Field Wiring Terminal Identification For Raise/Lower Models Terminal Identification For Analog Input ModelsAnalog Voltage Input with Guard RAISE/LOWER Inputs with Guard Analog Current Input 4-20 mA with GuardRaise/Lower & Guard Inputs from Relay Contacts Current Output to FSK Bi-State Transmitter DC PowerInitial Checks Operating NotesField Wiring CI-9110 Service Troubleshooting Hints General Principles Setting Output LimitsTest Setup ProcedureCalibration Precaution Calibration Test SetupPreliminary Calibration Check Analog Test SetupPressure Output Check Detailed Calibration for Analog ModelFeedback Zero & Span Current Output Span & LoadDetailed Calibration for RAISE/LOWER Model Raise/Lower Test SetupCPU Board & Termination Board Reference Table PCB Reference DrawingsAssembly, Analog Type CPU Board with Current Output Assembly, Raise/Lower Type CPU Board with Current Output RAISE/LOWER Input Model Analog Input ModelStepper Drive Mechanism Analog OutputAccuracy Analog Models Accuracy RAISE/LOWER ModelsRange Factory Calibrated with Pressure Regulator AssemblyInstrument Enclosure EnvironmentalHumidity 10 to 95% over -20to +130 F -29to +55 Range Parts Referenced in Figure Model 9110 Main PartsRemote Set Regulator Actuator Unit Remote Set Regulator Actuator Unit Mounting Parts Remote SET Regulator Basic Parts Remote Set Regulator Assembly Basic PartsGuidelines for System Grounding Basic Ground Rod Installation General Recommendations Noise and Signal ErrorsGrounding of Equipment Housing Transients and Interference Grounding of Transmitter Types of Earth Grounds AC Power Grounding System Sandy Soil Dry SoilRocky Soil Following installation procedures apply Several DPCs Mounted in Metal Cabinet with Power SupplyGrounding for DPCs and Power Supplies Single Metal Cabinet Multiple DPC Cabinets Powered by Single Power Supply Elements of a Facility Ground System References Multiple Clusters of DPC Cabinets Powered by Local SuppliesPage Remote Set Regulator Model 9110-00A
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