Output trim, Hold Mode, Trim Outputs | Emerson 54e pH/ORP specification

MODEL 54e pH/ORP	SECTION 4.0
	CALIBRATION

4.7 HOLD MODE

7.00pH

Hold Mode: Off

Placing the Controller on Hold for Maintenance. Before performing main- tenance or repair of the sensor, the Controller can be placed in hold (refer to Section 5.6 to enable this feature) to prevent process upsets while the reading is off-line. This will place the current outputs into the selected default states (see Section 5.6). The relays will act as selected in relay default, see Section 5.7.

Exit	Cont	Edit	Before removing the sensor from the process, press any key and then

			Enter (F4). When the hold mode has been enabled, the hold mode
			screen (on the left) will appear prior to calibration. To continue without
			putting the controller in hold, simply press Cont (F3). To put the controller
	7.00 pH		in hold, press Edit (F4), use the arrow key to change the "Off" to "On" and
	7.00 pH		press Save (F4).
			press Save (F4).
			NOTE

26.2°C 12.0mA

Hold Mode Activated

When the Hold Mode is activated ("On"), "Hold Mode Activated" will always appear on the bottom line of the display.

Always calibrate after cleaning or repair of the pH sensor. After installing the sensor back into the process, always change the Hold Mode setting to OFF.

4.8 TRIM OUTPUTS

Temp compensation pH slope

Output trim

ExitEnter

The instrument’s current outputs may be calibrated (trimmed) if neces- sary. If either the power board or the CPU board is replaced, the outputs must be calibrated. To perform this procedure, a calibrated meter must be connected to the output being calibrated.

To perform an output calibration, from the main display press any key to obtain the main menu. With the cursor on “calibrate,” press Enter (F4). With the cursor on “Output trim,” press Enter (F4) again. Select “Trim out- put 1” or “Trim output 2” as appropriate.

Press Edit (F4) to select Cal point 1 (4 mA expected and simulated) or Cal point 2 (20 mA expected and simulated). Adjust the Meter value to match the reading of the calibrated meter connected to the output. Press Enter (F4) to complete the calibration.

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Emerson 54e pH/ORP instruction manual Output trim, Hold Mode, Trim Outputs

Contents

Model 54e pH/ORP PH/ORP Hart Analyzer/Controller Electrical Shock Hazard Essential InstructionsPage Description and Specifications Model 54E PH/ORP Microprocessor AnalyzerSection Title Appendix Title List of TablesTable No Title About This Document Table of Contents List of Figures Section Description and Specifications General DescriptionDescription of Controls Current Outputs Specifications Physical Specifications GeneralPower Relative Humidity 95%, non condensing Alarms Recommended Sensors Analyzer Specifications @ 25C Ordering Information Code OptionsPart NO. Description Unpacking and Inspection Section InstallationMechanical Installation Locating the Controller Panel Mounting Alarm Relay Output Wiring Section WiringPower Input Wiring Analog Output Wiring 454EPH02 PH Sensor Wiring PH Sensor CompatibilityTions will Result in Controller MALFUNC- Tion 454EPH01 Cable Dressing Final Electrical Check Wiring to Model Introduction Section Calibration Hold Mode Off Adjust temp 25.1 CTemperature Calibration Autocal buffer Buffer 1 -- WaitAutomatic TWO-POINT Calibration Auto buffer cal done Use the arrow keys to select the correct bufferCalibration Notes Manual TWO-POINT Calibration Calibrate pointPt 04.00pH 25C Pt calibration done SINGLE-POINT pH Calibration Standardize 7.01 pH 59.16 mV/pH Temperature Compensation OptionsTemp comp Auto Output trim Hold Mode Output trimTrim Outputs PH Settings List Section Software Configuration Ranges Factory Settings User Settings Diagnostics Section Outline of Menu Levels Setpoint 07.00 pH Alarm High 14.00pHChanging Alarm Setpoints Simulate tests Changing Output Setpoints PID only Setpoint 7.00 pH4mA 0.00 pH 20mA 2.00 pH Setpoint + 06.90 pH MA +00.00 pH OutputOutput MA 0.00 pH 20 mA 14.00 pH Output 1 12.00 mA Simulated tests Alarm setpoints Output setpointsTest output Test alarm Testing Outputs and Alarms Test alarm 1 Open Test alarm 1 Open Measure pH Display right AL2 Security Caution Display contrast Timeout On Output Control Parameters Control ModeDisplay Changing Output Parameters Fault 22.00 mA Range 4-20 mAlRange 4-20 mA Hold Disable feature Fault 22.00mAOutput 2 control Output 2 setup Hold feature setup Alarms Alarm 3 controlInterval timer Relay Default None Alarm LowSetpoint 0.01 pH Delay 0 sec Hysteresis 0.01 pH Delay 0 sec URV 2.00 pH Relay default NoneSetpoint +07.00 pH Time period 30 sec Alarm 4 Setup Alarm FaultFeed limit Disable Timeout 3600 sec Timer Disable Recovery 600 secOn time 120 sec Interval Timer Examples Diagnostics Diagnostics OffZero offset 60 mV Stabilize pH 0.01 pH Stabilize time 10 sec DiagnosticsAuto Calibration Setup Autocal Standard Standard Buffers Auto Calibration Setup Section Theory of Operation Continuous Sensor Diagnostics Interval Timer Typical set pointsSee .8 for instructions on chang- ing these setpoints Time Proportional Control TPC Mode Code Alarm Relays Analog Outputs Normal Mode Action Definitions Controller Mode PriorityController Mode Priority Chart Condition Definitions Measurement and Set Point Feedback Control PID Control Mode CombinationsPID Control Code PID Control Proportional Mode Gain Proportional Gain Plus Integral ResetControl Loop Adjustment and Tuning Process Reaction Curve Process Reaction Curve Method PID Control Section Special Procedures and Features Password ProtectionLevel 1 3 Password Privileges Lock all Configuring SecuritySecurity Custom Curve Solution Temperature Compensation Temp coeff +.000Sensor iso 07.00 pH Operate iso +07.00 pH Troubleshooting is easy as 1, 2, 3… Section Troubleshooting Diagnostic Messages Description of problem Diagnostic Messages Symptom Action Quick Troubleshooting Guide Diagnostic Variables Theoretical pH vs. Millivolt Values at 25C 77F Ohms Ambient Temperature Troubleshooting GuidelinesTemperature Compensation Circuit Troubleshooting Procedure Preamplifier Troubleshooting Procedure Preamp in a junction box FigureController preamp check Figure Junction Box Preamplifier Check No Power Troubleshooting Guide Coated glass electrode Clean with soft cloth and clean water Password protected Part Number Description Replacement Parts General Warranty RepairNON-WARRANTY Repair Section Return of Material Quick Startup ORP Appendix a ORP Configuration Item Choices ORP Settings User Settings Table A-1. ORP Settings List Diagnostics Section Choices ORP Settings User Settings Simulated tests Output setpoints ORP Calibration Standardize 400 mV Sensor or Circuit Board only Return of Materials Request Return of Material Warranty Specifications subject to change without notice