Dissolved Oxygen Measurement System with Air Blast Cleaner Manual

ManualsBrandsEmerson ManualsOxygen EquipmentEmerson Dissolved Oxygen Measurement System DO-04

Model DO-03/04

Dissolved Oxygen Measurement System

with Air Blast Cleaner

Instruction Manual

51-DO-03/04/rev.C

October 2004

Summary of content (70 pages)

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Instruction Manual 51-DO-03/04/rev.
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ESSENTIAL INSTRUCTIONS READ THIS PAGE BEFORE PROCEEDING! Rosemount Analytical designs, manufactures, and tests its products to meet many national and international standards. Because these instruments are sophisticated technical products, you must properly install, use, and maintain them to ensure they continue to operate within their normal specifications.
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MODEL DO-03/04 TABLE OF CONTENTS MODEL DO-03/04 MEASURING SYSTEM TABLE OF CONTENTS Section Title Page 1.0 1.1 1.2 1.3 SPECIFICATIONS................................................................................................... Features and Applications ....................................................................................... Specifications........................................................................................................... Ordering Information...................
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MODEL DO-03/04 TABLE OF CONTENTS TABLE OF CONTENTS (CONTINUED) Section Title Page 9.0 9.1 9.2 9.3 9.4 MAINTENANCE ...................................................................................................... Analyzer (Model 54eA-01)....................................................................................... Oxygen Sensor (Model 499ADO-54) ...................................................................... Air Compressor............................................................
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MODEL DO-03/04 TABLE OF CONTENTS LIST OF FIGURES Section 1-1 Title Page Suggested Arrangement of Handrail Mounting Assembly, Maintenance Clamp,.... Air Compressor Enclosure, and 54eA Analyzer ...................................................... 4 1-2 Analyzer Dimensions............................................................................................... 4 1-3 Enclosure Dimensions.............................................................................................
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MODEL DO-03/04 SECTION 1.0 SPECIFICATIONS SECTION 1.0 SPECIFICATIONS • COMPLETE SYSTEM INCLUDES sensor, analyzer, sensor washer head, mounting hardware, and air compressor. • AIR BLAST CLEANER system can keep DO sensors longer. funtioning up to 3 months or • SENSOR MAINTENANCE is quick and easy. • FEATURE-PACKED ANALYZER: on-board pressure sensor for completely automatic air calibration, large backlit display, dual outputs, three fully programmable alarm relays.
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MODEL DO-03/04 SECTION 1.0 SPECIFICATIONS Cathode: Gold (not normally wetted) Outputs: Two 4-20 mA or 0-20 mA isolated outputs. Continuously adjustable. Outputs can be assigned to oxygen or temperature. Output dampening is user-selectable. Maximum load at 100/200 Vac is 550 ohms. Accuracy: ±0.2 ppm at 25°C Output Accuracy: ± 0.05 mA Repeatability: ±0.05 ppm 25°C Alarms: Relays 1, 2, and 3 are assignable to oxygen or temperature.
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MODEL DO-03/04 SECTION 1.0 SPECIFICATIONS SPECIFICATIONS - COMPRESSOR FOR AIR BLAST CLEANER SYSTEM SPECIFICATIONS - HANDRAIL MOUNTING ASSEMBLY Enclosure: Fiberglass reinforced polyester with polyester cover, NEMA 4x (IP65). 11.9 x 11.9 x 6.9 in (302 x 302 x 175 mm). Materials of Construction: Compressor: Oil-less, non-lubricating piston and cylinder. 1/12 HP permanent split capacitor motor with thermal overload protection.
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MODEL DO-03/04 SECTION 1.0 SPECIFICATIONS FIGURE 1-1. Suggested arrangement of handrail mounting assembly, maintenance clamp, air compressor enclosure, and 54eA analyzer WHEN INCH AND METRIC DIMS ARE GIVEN MILLIMETER INCH FIGURE 1-2.
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MODEL DO-03/04 SECTION 1.0 SPECIFICATIONS WHEN INCH AND METRIC DIMS ARE GIVEN INCH MILLIMETER FIGURE 1-3. Enclosure dimensions FIGURE 1-4. Standard sensor with integral cable FIGURE 1-5.
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MODEL DO-03/04 SECTION 1.0 SPECIFICATIONS ORDERING INFORMATION The Model DO -03/04 is a complete system for the determination of oxygen in wastewater aeration basins. It consists of a 54eA analyzer, a 499ADO-54 oxygen sensor, an air blast washer head with air compressor and hose, and a handrail mounting bracket. All hardware necessary to mount the analyzer and the air compressor enclosure on a handrail is provided. Cable gland fittings for the analyzer are also supplied.
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MODEL DO-03/04 SECTION 2.0 INSTALLATION SECTION 2.0 INSTALLATION 2.1 UNPACKING AND INSPECTION Inspect the shipping container. If it is damaged, contact the shipper immediately for instructions. If there is no apparent damage, unpack the container. Be sure all items shown on the packing list are present. If items are missing, notify Rosemount Analytical immediately. The Model DO-03/04 consists of the following items.
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MODEL DO-03/04 SECTION 2.0 INSTALLATION FIGURE 2-1. Suggested arrangement of handrail mounting assembly, maintenance clamp, air compressor enclosure, and 54eA analyzer. 2.2.2 Installing the analyzer When used in Model DO-03/04, the 54eA analyzer is intended to be mounted on the basin handrail. See Figures 2-1 and 2-2. 2.2.3 Installing the air compressor enclosure The air compressor is in a NEMA 4X fiberglass enclosure. Figure 2-3 shows how to attach the enclosure to a handrail. 1.
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MODEL DO-03/04 SECTION 2.0 INSTALLATION 2.2.6 Installing the sensor in the washer head assembly 1. Remove the sensor from its box. Remove the plastic protective cap from the end of the sensor. Save the cap. 2. Replace the knurled cap provided with the sensor with the smooth cap (PN 33521-01). The smooth cap is shipped loose. a. Hold the sensor with the membrane end pointing up. b. Unscrew the knurled cap. Leave the membrane in place. c. Screw the smooth cap in place. Hand tighten. d.
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MODEL DO-03/04 SECTION 2.0 INSTALLATION FIGURE 2-3. Attaching the air compressor enclosure to the handrail FIGURE 2-4. Assembling and attaching the handrail mounting assembly. The spring pin (not shown) shipped with the handrail mounting assembly is not used.
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MODEL DO-03/04 SECTION 2.0 INSTALLATION FIGURE 2-5.
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MODEL DO-03/04 SECTION 3.0 WIRING SECTION 3.0 WIRING 3.1 GENERAL WARNING Electrical installation must conform to the National Electrical Code, all state and local codes, and all plant codes and standards for electrical equipment. Electrical installation and wiring must be done by qualified personnel. The five holes in the bottom of the Model 54eA enclosure accept 1/2-in. (PG-13.5) strain relief connectors or conduit fittings. The rear openings are for power and alarm relay wiring.
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MODEL DO-03/04 SECTION 3.0 WIRING DWG. NO. 454EPH02 REV. D FIGURE 3-1.
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MODEL DO-03/04 SECTION 3.0 WIRING FIGURE 3-2.
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MODEL DO-03/04 SECTION 3.0 WIRING FIGURE 3-3.
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MODEL DO-03/04 SECTION 3.0 WIRING 3.3 SENSOR WIRING 3.3.1 General The wiring label, which is shown in Figure 3-4, is a general purpose label. It has wiring information concerning other sensors, for example, contacting conductivity and pH, that can be used with the 54eA instrument platform. For the measurement of oxygen only terminal strip TB3 is used. 3.3.2 Wiring the Oxygen Sensor Figure 3-5 shows how to wire the oxygen sensor to the analyzer.
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MODEL DO-03/04 SECTION 4.0 DISPLAY AND OPERATION SECTION 4.0 DISPLAY AND OPERATION 4.1 DISPLAY Figure 4-1 shows the main display. 1.00 ppm 26.2°C. ALI: 0.50 12.00 mA I: 3200 nA FIGURE 4-1. Main Display Screen The concentration of oxygen is displayed continuously in large numerals. The temperature and output current are displayed on the second line. The third line can be configured by the user. In the example the third line shows the alarm 1 setpoint and the sensor current. 3.
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION SECTION 5.0 SOFTWARE CONFIGURATION Figure 5-1 is an outline of the menu structure. FIGURE 5-1.
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION FIGURE 5-1. Menu Tree for the 54eA Analyzer (continued) Calibrate (see previous page) Main Menu Diagnostic Variable (see previous page) Program Alarm Setpoints Alarms 1, 2, and 3 setpoints Output setpoints 4 mA or 0 mA 20 mA Present output current Simulated tests Test output 1 or 2 Test alarm 1, 2, 3, or 4 Configure Display Main Sensor Oxygen Sensor type and manufac.
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION FIGURE 5-1.
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION Table 5-1 lists the default settings and the range of choices available for each setting. To reduce the chance of error when configuring the analyzer the first time, enter settings in the order shown in the table. TABLE 5-1. Program Settings List ITEM SETPOINTS A. Alarms (Section 5.1) 1. Alarm 1 (low action) a. if oxygen (ppm) b. if oxygen (% saturation) c. if temperature 2. Alarm 2 (high action) a. if oxygen (ppm) b. if oxygen (% saturation) c.
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION TABLE 5-1. Program Settings List (continued) ITEM CONFIGURE B Outputs (Section 5.5) 1. Output 1 a. Measurement b. Control 2. Output 1 Setup a. Current b. Dampening c. Hold mode d. Fixed hold value e. Fault value 3. Output 2 a. Measurement b. Control 4. Output 2 Setup 5.
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION TABLE 5-1. Program Settings List (continued) ITEM CONFIGURE (continued) D.Temperature compensation (Section 5.7) 1. Temperature compensation 2. Manual temperature E. Noise Reduction (section 5.8) Noise rejection F. Barometric Pressure (Section 5.9) 1. Barometric pressure 2. Barometric pressure manual 3. Barometric pressure units G. Main sensor calibration (Section 5.10) 1. Stabilize reading a. oxygen (ppm) b. oxygen (% saturation) 2. Stabilize time 3.
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION 5.1 CHANGING ALARM SETPOINTS 1. Before changing alarm setpoints, be sure that alarms are properly configured. See Section 5.6. 2. Press any key to enter the main menu. Move the cursor to "Program" and press Enter (F4). Alarm setpoints Output setpoints Simulate tests Exit 3. Press Enter (F4). Enter 4. Move the cursor to the desired alarm and press Enter (F4). Alarm 1 setpoint Alarm 2 setpoint Alarm 3 setpoint Exit Enter Alarm Low : 0.
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION 5.2 RANGING THE OUTPUTS 1. Ranging the outputs means assigning values to the low (0 or 4 mA) and high (20 mA) outputs. Before ranging the outputs, be sure the outputs are properly configured. See Section 5.5. 2. Press any key to enter the main menu. Move the cursor to "Program" and press Enter (F4). 3. Move the cursor to "Output setpoints" and press Enter (F4).
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION 5.3 TESTING OUTPUTS AND ALARMS 1. For testing purposes, the analyzer can be programmed to generate simulated outputs and to activate and deactivate alarms. 2. Press any key to enter the main menu. Move the cursor to "Program" and press Enter (F4). 3. Move the cursor to "Simulated tests" and press Enter (F4). Output setpoints Simulated tests Configure Exit Enter 4. Move the cursor to the desired output or alarm.
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION 5.4 CHOOSING DISPLAY OPTIONS 1. The 54eA analyzer can be used with other oxygen sensors manufactured by Rosemount Analytical as well as with chlorine, monochloramine, and ozone sensors. The user must configure the analyzer to match the sensor being used. 2. The display menu also lets the user customize the third line in the display, change timeout values, choose a language other than English, and change the display contrast. 3.
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION 5.4 CHOOSING DISPLAY OPTIONS (CONTINUED) 7. Set the remainder of the display parameters. Use the and keys to choose the desired parameter. Then press Edit (F4). Use the key to move the cursor to the desired selection. Press Save (F4) to store.
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION 5.5 CHANGING OUTPUT PARAMETERS 1. This section describes how to configure the analyzer outputs. Outputs can be configured to represent dissolved oxygen or temperature. 2. Press any key to enter the main menu. Move the cursor to "Program" and press Enter (F4). 3. Move the cursor to "Configure" and press Enter (F4). Output setpoints Simulated tests Configure Exit Enter 4. Move the cursor to "Outputs" and press Enter (F4).
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION 5.5 CHANGING OUTPUT PARAMETERS (continued) 7. Output setup for normal outputs: Output 1 Control Output 1 Setup Output 2 Control Exit a. Move the cursor to the desired output setup and press Enter (F4). Enter b. Use the and arrow keys to move the cursor to the desired parameter. Press Edit (F4). Use the arrow keys to change the setting to the desired value and press Save(F4) to store the value.
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION 5.6 CHANGING ALARM PARAMETERS 1. This section describes how to configure the analyzer alarms. Alarms 1, 2, and 3 can be assigned to dissolved oxygen or temperature. In addition, alarm 1, 2, or 3 can be configured as a feed limit timer or as an interval timer (see steps 10 and 11). Alarm 4 is always a fault alarm. 2. Press any key to enter the main menu. Move the cursor to "Program" and press Enter (F4). 3.
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION 5.6 CHANGING ALARM PARAMETERS (continued) c. Activate : Process Exit Edit a. Move the cursor to the desired alarm setup and press Enter (F4). Enter Alarm : Low Setpoint: 0.000 ppm Hysteresis: 0.000 ppm Exit Edit FIGURE 5-2. Low Alarm 32 d. The display returns to the "Activate: Process" screen. Press Exit (F1) until the screen in Step 5 appears. 8.
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION 5.6 CHANGING ALARM PARAMETERS (continued) 9. Alarm 4 setup: Alarm : Fault Alarm 4 is a dedicated fault alarm. When a fault condition exists, the red LED on the front display will light. a. From the menu header screen (step 6) move the cursor to "Alarm 4 setup." Exit Edit b. To disable the alarm, press Edit (F4) and use the key to change the "Fault" to "Off" 10. Feed limit timer setup: Alarm 1, 2, or 3 can be configured as a feed limit timer.
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION 5.6 CHANGING ALARM PARAMETERS (continued) 11. Interval timer setup: Alarm 1, 2, or 3 can be used as an interval timer. The selected relay will open and close at time intervals programmed by the user. The interval timer is useful for automatic cleaning of sensors. NOTE The alarm relay used for the interval timer cannot be used for other purposes.
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION 5.7 TEMPERATURE COMPENSATION AND TEMPERATURE UNITS 1. Refer to Section 6.1 for a discussion of the ways in which temperature affects dissolved oxygen measurement. 2. Press any key to enter the main menu. Move the cursor to "Program" and press Enter (F4). 3. Move the cursor to "Configure" and press Enter (F4). 4. Move the cursor to "Temperature" and press Enter (F4). pH Temperature Noise rejection Exit Enter 5.
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION 5.8 NOISE REDUCTION 1. For maximum noise reduction the frequency of the ac power must be entered into the analyzer. 2. Press any key to enter the main menu. Move the cursor to "Program" and press Enter (F4). 3. Move the cursor to "Configure" and press Enter (F4). 4. Move the cursor to "Noise rejection" and press Enter (F4). Temperature Noise rejection Main sensor cal Exit Enter Noise rejection : 60 Hz Exit 36 Edit 5.
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION 5.9 BAROMETRIC PRESSURE 1. Barometric pressure is used during air calibration. 2. Press any key to enter the main menu. Move the cursor to "Program" and press Enter (F4). 3. Move the cursor to "Configure" and press Enter (F4). Noise rejection Barometric pressure Main sensor cal Exit Enter 5. Use the and keys to move through the list of items. To make a change, press Edit (F4).
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION 5.10 MAIN SENSOR CALIBRATION PARAMETERS 1. Main sensor refers to the dissolved oxygen sensor. 2. Press any key to enter the main menu. Move the cursor to "Program" and press Enter (F4). 3. Move the cursor to "Configure" and press Enter (F4). 4. Move the cursor to "Main sensor cal" and press Enter (F4). Noise rejection Main sensor cal Security Exit Enter 5. Use the and keys to move through the list of items. To make a change press Edit (F4).
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION 5.11 SECURITY 1. The analyzer can be programmed to require a password for access to menus. There are three levels: Level 1: A level 1 user can 1. Zero and calibrate the oxygen sensor 2. Calibrate the barometric pressure sensor 3. Change temperature compensation from automatic to manual and enter a manual compensation temperature 4. View diagnostic variables. Level 2: A level 2 user can 1. Do everything a level 1 user can do 2. Change alarm setpoints 3.
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MODEL DO-03/04 SECTION 5.0 SOFTWARE CONFIGURATION 5.12 ANALYZER MODE PRIORITY The Model 54eA analyzer can function in different modes depending on how it is configured, what process conditions exist, and actions an operator may have made. To reconcile these possible modes, there is a set priority that determines exactly what will happen to the two (2) current outputs and the four (4) alarm relays in the event of multiple modes occurring at the same time. See Table 5-2 below.
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MODEL DO-03/04 SECTION 6.0 CALIBRATION - TEMPERATURE SECTION 6.0 CALIBRATION - TEMPERATURE 6.1 INTRODUCTION The Model 499ADO sensor is a membrane-covered amperometric sensor. As the sensor operates, oxygen diffuses through the membrane and is consumed at an electrode immediately behind the membrane. The reaction produces a current that depends on the rate at which oxygen diffuses through the membrane.
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MODEL DO-03/04 SECTION 6.0 CALIBRATION - TEMPERATURE 6.2 TEMPERATURE CALIBRATION Place the sensor and a standard thermometer in the process liquid. 1. Check the analyzer temperature reading (main display) to make sure the sensor has stabilized. Compare the analyzer temperature with the standard thermometer. The readings should differ by at most 1°C. If the readings differ by a greater amount, refer to Section 15.3. Go to the next step if the reading requires adjustment. 2.
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MODEL DO-03/04 SECTION 7.0 CALIBRATION - DISSOLVED OXYGEN SECTION 7.0 CALIBRATION - DISSOLVED OXYGEN 7.1 INTRODUCTION As Figure 7-1 shows, oxygen sensors generate a current directly proportional to the concentration of dissolved oxygen in the sample. Calibrating the sensor requires exposing it to a solution containing no oxygen (zero standard) and to a solution containing a known amount of oxygen (full-scale standard).
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MODEL DO-03/04 SECTION 7.0 CALIBRATION - DISSOLVED OXYGEN 7.2 ZEROING THE SENSOR 1. Place the sensor in a fresh solution of 5% sodium sulfite (Na2SO3) in water. Be sure air bubbles are not trapped against the membrane. The current will drop rapidly at first and then gradually reach a stable zero value. To monitor the sensor current, go to the main display. Press any key to obtain the main menu. Press the key once to highlight “Diagnostic variables.” Press Enter (F4).
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MODEL DO-03/04 SECTION 7.0 CALIBRATION - DISSOLVED OXYGEN 7.3 CALIBRATING THE SENSOR IN AIR 1. Remove the sensor from the process liquid. Use a soft tissue and a stream of water from a wash bottle to clean the membrane. Blot dry. The membrane must be dry during air calibration. 2. Pour some water in a beaker and suspend the sensor with the membrane about 0.5 inch (1 cm) above the water surface. To avoid drift caused by temperature changes, keep the sensor out of the direct sun. 3.
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MODEL DO-03/04 SECTION 7.0 CALIBRATION - DISSOLVED OXYGEN 8. Press Exit (F1) four times to return to the main display. NOTE If Hold was activated during calibration, “Hold Mode Activated” will continue to flash in the main display. Return the sensor to normal and deactivate Hold. Refer to Section 5.5, step 9. 9. During calibration, the analyzer stores the measured current and calculates the sensitivity. Sensitivity is the sensor current in nA divided by the saturation concentration of oxygen in ppm.
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MODEL DO-03/04 SECTION 7.0 CALIBRATION - DISSOLVED OXYGEN 7.4 CALIBRATING THE SENSOR AGAINST A STANDARD INSTRUMENT The analyzer and sensor can be calibrated against a standard instrument. For oxygen sensors installed in aeration basins in waste treatment plants, calibration against a second instrument is often preferred. For an accurate calibration be sure that… 1. The standard instrument has been zeroed and calibrated against water-saturated air following the manufacturer's instructions. 2.
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MODEL DO-03/04 SECTION 7.0 CALIBRATION - DISSOLVED OXYGEN 7.5 CALIBRATING BAROMETRIC PRESSURE 1. If the barometric pressure measured by the analyzer does not agree with the local barometric pressure, calibrate the pressure sensor. A pressure error of 3 mm Hg introduces an error of about 0.5% in the final measurement. When calibrating the pressure reading, be sure to use the actual barometric pressure.
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MODEL DO-03/04 SECTION 8.0 CALIBRATION - CURRENT OUTPUTS SECTION 8.0 CALIBRATION - CURRENT OUTPUTS 8.1 INTRODUCTION Although the analyzer outputs are calibrated at the factory, they can be trimmed in the field to match the reading from a standard current meter. Both the low output (0 or 4 mA) and the high output (20 mA) can be trimmed. 8.2 TRIMMING THE OUTPUTS 1. From the main display, press any key to obtain the main menu. With the cursor on "Calibrate" press Enter (F4).
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MODEL DO-03/04 SECTION 9.0 MAINTENANCE SECTION 9.0 MAINTENANCE 9.1 ANALYZER (MODEL 54eA-01) The Model 54eA-01 analyzer provided with the Model DO-03/04 system requires little routine maintenance. Clean the analyzer enclosure and front panel by wiping with a clean soft cloth dampened with water. A mild detergent solution can also be used. Do not use solvents, like alcohol, that might cause a buildup of static charge. Table 9-1 gives a list of replacement parts. TABLE 9-1.
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MODEL DO-03/04 SECTION 9.0 MAINTENANCE To reassemble the sensor and air blast cleaner… 1. Inspect the sensor O-ring. If it is cracked or cut, replace it. Clean the O-ring and slide it over the end of the sensor until it rests against the lower edge of the bottom facing threads. 2. Clean and dry the bottom portion of the sensor washer assembly. Inspect the surface that the sensor O-ring seals against to verify that it is clean and smooth. Inspect the dual O-rings to ensure that they are not cracked or cut.
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MODEL DO-03/04 SECTION 9.0 MAINTENANCE FIGURE 9-1. Sensor Parts SPARE PARTS 33523-00 Electrolyte Fill Plug 9550094 O-Ring, Viton 2-014 24057-00 Membrane Retainer (smooth cap) 23501-00 Dissolved Oxygen Membrane Assembly: includes one membrane assembly and one O-ring 23502-00 Dissolved Oxygen Membrane Kit: includes 3 membrane assemblies and 3 O-rings 9210264 #1 Dissolved Oxygen Sensor Fill Solution, 4 oz (120 mL) 9.
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MODEL DO-03/04 SECTION 9.0 MAINTENANCE 9.4 AIR BLAST SENSOR WASHER The air blast sensor washer needs little routine maintenance. Replace the two large O-rings on the base of the washer head and the sensor sealing O-ring if they become cut or dirty or if there is evidence of water leaking into the washer head. The three O-rings are available as a kit (PN 24053-00). See Figure 9-2 for replacement parts. FIGURE 9-2.
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MODEL DO-03/04 SECTION 10.0 TROUBLESHOOTING SECTION 10.0 TROUBLESHOOTING 10.1 OVERVIEW The 54eA analyzer continuously monitors itself and the sensor for faults. When the analyzer detects a fault in the oxygen sensor or in the instrument itself it displays a fault message. If alarm 4 was enabled, the red FAIL LED will also light and relay 4 will activate. The outputs will go to 22.00 mA or to the value programmed in Section 5.5. See Section 10.
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MODEL DO-03/04 SECTION 10.0 TROUBLESHOOTING 10.2.1 High input current Excessive sensor current implies that the oxygen sensor is miswired or the sensor has failed. Verify that wiring is correct, including connections through a junction box. See Section 3.3. If wiring is correct, try replacing the sensor. 105.2.2 Check sensor zero The sensor current was extremely high when the sensor was zeroed. Typical zero current for an oxygen sensor is less than 50 nA.
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MODEL DO-03/04 SECTION 10.0 TROUBLESHOOTING 10.3 TROUBLESHOOTING WHEN NO FAULT MESSAGE IS SHOWING - TEMPERATURE 10.3.1 Temperature measured by standard was more than 1°C different from analyzer. A. Is the standard thermometer, RTD, or thermistor accurate? General purpose liquid-in-glass thermometers, particularly ones that have been mistreated, can have surprisingly large errors. B. Is the temperature element in the sensor completely submerged in the liquid? C.
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MODEL DO-03/04 SECTION 10.0 TROUBLESHOOTING 10.4.2 Zero reading Is unstable. A. Is the sensor properly wired to the analyzer? See Section 3.3. Verify that all wiring connections are tight. B. Readings are often erratic when a new or rebuilt sensor is first placed in service. Readings usually stabilize after an hour. C.
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MODEL DO-03/04 SECTION 10.0 TROUBLESHOOTING 10.4.6 Process readings are erratic. A. Readings are often erratic when a new sensor or a rebuilt sensor is first placed in service. The current usually stabilizes after a few hours. B. Is the sample flow within the recommended range? High sample flow may cause erratic readings. Refer to the sensor instruction manual for recommended flow rates. C. Gas bubbles impinging on the membrane may cause erratic readings.
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MODEL DO-03/04 SECTION 10.0 TROUBLESHOOTING 10.5 TROUBLESHOOTING NOT RELATED TO MEASUREMENT PROBLEMS Problem Display segments missing Alarm relays are chattering Incorrect current output Display too light or too dark “Level 1, 2 or 3 security: Lock” shown in display “Hold mode activated” showing in display “Simulating output 1 or 2” showing in display “Simulating alarm 1, 2, 3 or 4” showing in display Action Replace display board 1. Check alarm setpoints. 2.
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MODEL DO-03/04 SECTION 10.0 TROUBLESHOOTING 10.7 SIMULATING TEMPERATURE 10.7.1 General. The 54eA analyzer accepts a Pt100 RTD. The Pt100 RTD is in a three-wire configuration. See Figure 10-2. 10.7.2 Simulating temperature To simulate the temperature input, wire a decade box to the analyzer or junction box as shown in Figure 10-3. To check the accuracy of the temperature measurement, set the resistor simulating the RTD to the values indicated in the table and note the temperature readings.
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MODEL DO-03/04 SECTION 11.0 RETURN OF MATERIAL SECTION 11.0 RETURN OF MATERIAL 11.1 GENERAL. To expedite the repair and return of instruments, proper communication between the customer and the factory is important. Before returning a product for repair, call 1-949-757-8500 for a Return Materials Authorization (RMA) number. 11.2 WARRANTY REPAIR. The following is the procedure for returning instruments still under warranty: 1. Call Rosemount Analytical for authorization. 2.
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RETURN OF MATERIALS REQUEST C FROM: U S T O M E R N O T I C E T O RETURN •IMPORTANT! This form must be completed to ensure expedient factory service.
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WARRANTY Seller warrants that the firmware will execute the programming instructions provided by Seller, and that the Goods manufactured or Services provided by Seller will be free from defects in materials or workmanship under normal use and care until the expiration of the applicable warranty period. Goods are warranted for twelve (12) months from the date of initial installation or eighteen (18) months from the date of shipment by Seller, whichever period expires first.
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The right people, the right answers, right now. ON-LINE ORDERING NOW AVAILABLE ON OUR WEB SITE http://www.raihome.com Specifications subject to change without notice. Credit Cards for U.S. Purchases Only. Emerson Process Management Liquid Division 2400 Barranca Parkway Irvine, CA 92606 USA Tel: (949) 757-8500 Fax: (949) 474-7250 http://www.raihome.com © Rosemount Analytical Inc.