Emerson Rosemount FCL-01 Reference Manual
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Emerson Rosemount FCL-01 Reference Manual

Emerson Rosemount FCL-01 Reference Manual

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Reference Manual
00809-0100-3412, Rev AB
October 2023
Rosemount
™
FCL
Free Chlorine System with Rosemount 1056 Transmitter

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  • Page 1 Reference Manual 00809-0100-3412, Rev AB October 2023 Rosemount ™ Free Chlorine System with Rosemount 1056 Transmitter...
  • Page 2 Essential instructions Read this page before proceeding! Emerson 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. You must adhere to the following instructions and integrate them into your safety program when installing, using, and maintaining Emerson's Rosemount products.
  • Page 3  WARNING Electrical shock Making cable connections to and servicing this instrument require access to shock hazard level voltages, which can cause death or serious injury. Equipment protected throughout by double insulation. Be sure to disconnect all hazardous voltages before opening the enclosure. Disconnect relay contacts made to separate power sources before servicing.

  • Page 5: Table Of Contents

    Reference Manual Contents 00809-0100-3412 October 2023 Contents Chapter 1  Installation..........................7 1.1 Unpacking and inspection......................7 1.2 General installation information....................7 1.3 Sample requirements......................... 8 1.4 Mounting, inlet, and drain connections................... 8 1.5 Install the sensor(s)........................11 Chapter 2  Wiring............................13 2.1 Wire power..........................13 2.2 Analog output wiring........................ 13 2.3 Alarm wiring..........................14 2.4 Wire sensor..........................
  • Page 6 8.5 Troubleshooting when no error message is showing - chlorine........88 8.6 Troubleshooting when no error message is showing - pH..........92 8.7 Troubleshooting when no error message is showing - general......... 96 8.8  Simulate chlorine inputs......................97 8.9 Simulate pH input........................98 8.10 Simulating temperature......................99 Emerson.com...

  • Page 7: Chapter 1 Installation

    2. If there is no apparent damage, then unpack the container(s). 3. Ensure that all items shown on the packing list are present. If items are missing, then notify Emerson immediately. 1.1.1  Rosemount FCL-01 (free chlorine without continuous pH correction) The FCL-01 consists of the following items mounted on a back plate.

  • Page 8: Sample Requirements

    The Rosemount FCL is intended for wall mounting only. Refer to Figure 1-1 Figure 1-2 for details. The sensor(s) screw into the flow cell adapters as shown in the figures. For FCL-02 (free chlorine with continuous pH adjustment), you must also install the pH sensor. Emerson.com...
  • Page 9 Reference Manual Installation 00809-0100-3412 October 2023 Figure 1-1: FCL-01 Dimensions are shown with inches above and millimeters below. A. Chlorine sensor B. Inlet C. Drain Rosemount FCL 1056...
  • Page 10 The sample drains through a ¾-in. barbed fitting. 1. Attach a piece of soft tubing to the fitting and allow the waste to drain to open atmosphere. NOTICE Do not restrict the drain line. Emerson.com...

  • Page 11: Install The Sensor(S)

    3. Confirm that sample is flowing through the flow cells. 1.5  Install the sensor(s) Emerson provides the Rosemount FCL with the sensor cable pre-wired to the transmitter. Procedure 1. Connect the chlorine sensor (499ACL-01-54-VP) to the cable labeled CL. 2. Connect the pH sensor (3900-VP-02-10) to the cable labeled pH.
  • Page 12 Installation Reference Manual October 2023 00809-0100-3412 Emerson.com...

  • Page 13: Chapter 2 Wiring

    Reference Manual Wiring 00809-0100-3412 October 2023 2  Wiring 2.1  Wire power Wire AC mains power supply to the power supply board, which is mounted vertically on the left hand side of the transmitter enclosure.  WARNING Electrical shock Electrical installation must be in accordance with the National Electrical Code (American National Standards Institute [ANSI]/National Fire Protection Association [NFPA]-70) and/or any other applicable national or local codes.

  • Page 14: Alarm Wiring

    Keep output signal wiring separate from power wiring. Do not run signal and power or relay wiring in the same conduit or close together in a cable tray. 2.3  Alarm wiring The alarm relay terminal strip is located just below the power connector on the power supply board. Alarm relay connections. Emerson.com...

  • Page 15: Wire Sensor

    Reference Manual Wiring 00809-0100-3412 October 2023 Figure 2-2: Alarm relay connections A. Alarm relay 1 B. Alarm relay 2 C. Alarm relay 3 D. Alarm relay 4 Keep alarm relay wiring separate from signal wiring. Do not run signal and power or relay wiring in the same conduit or close together in a cable tray.
  • Page 16 Connect green wire to metal conduit ground plate in bottom of enclosure. Figure 2-4: Wiring diagram for 3900VP-10 pH Sensor (blue cable) Table 2-2: Wiring diagram for 3900VP-10 pH Sensor (blue cable) Terminal Wire color Wire function slot White Resistance temperature device return White/red Resistance temperature device sense Emerson.com...

  • Page 17: Use Quick Start

    Reference Manual Wiring 00809-0100-3412 October 2023 (continued) Table 2-2: Wiring diagram for 3900VP-10 pH Sensor (blue cable) Terminal Wire color Wire function slot Resistance temperature device in Blue Solution ground Clear inner drain +5 V out (not used) -5 V out Clear shield pH shield Orange...
  • Page 18 Free Chlorine 4. Choose the desired units for chlorine. The screens in Step 5 Step 6 only appear if you have a Rosemount FCL-02. 5. If you have a FCL-01, go to Step 8. Otherwise, choose for Sensor 2 (S2). 6. Choose Analyzer Emerson.com...
  • Page 19 Reference Manual Wiring 00809-0100-3412 October 2023 7. Choose . Go to Step 9. Live/Continuous 8. The screen below appears only if you have an FCL-01. Enter the pH of the process liquid. 9. Choose the desired temperature units. The main display appears. The outputs and alarms (if an alarm board is present) are assigned to default values.
  • Page 20 Wiring Reference Manual October 2023 00809-0100-3412 Emerson.com...
  • Page 21 Reference Manual Wiring 00809-0100-3412 October 2023 Rosemount FCL 1056...
  • Page 22 Wiring Reference Manual October 2023 00809-0100-3412 Emerson.com...

  • Page 23: Display And Operation

    Reference Manual Display and operation 00809-0100-3412 October 2023 3  Display and operation 3.1  Display The transmitter has a four line display. Figure 3-1. You can customize the display to meet your requirements. Refer to Configure the main display. Figure 3-1: Main display When the transmitter is being programmed or calibrated, the display changes to a screen similar to the one shown in Figure...

  • Page 24: Keypad

    The navigation keys are used to increase or decrease the value of a numeral. Press ENTER to select an item and store numbers and settings. Press EXIT to return to the previous screen without storing changes. Pressing MENU always causes the main menu to appear. Emerson.com...

  • Page 25: Program The Transmitter

    Reference Manual Display and operation 00809-0100-3412 October 2023 Figure 3-5: Navigation keys A. Moves cursor up or increases the value of the selected digit. B. Moves cursor to the right. C. Moves cursor down or decreases the value of the selected digit. D.
  • Page 26 1 ( ) and output 2 ( ). The screen also shows which sensors the outputs are assigned to. is sensor 1. The assignments shown are the defaults for the FCL-01. Outputs are freely assignable under the Configure menu. Emerson.com...

  • Page 27: Security

    Reference Manual Display and operation 00809-0100-3412 October 2023 5. For practice, change the 20 mA settings for output 1 to 8.5 ppm a) Move the cursor to the line and press ENTER. O1 S1 20 mA: 10.00 The screen below appears. b) Use the navigation keys to change .

  • Page 28: Using Hold

    Once in hold, the sensor remains in hold until hold is turned off. However, if power is lost and then restored, hold is automatically turned off. Emerson.com...

  • Page 29: Configure The Main Display

    Reference Manual Display and operation 00809-0100-3412 October 2023 3.5.2  Put transmitter in hold Procedure 1. Press MENU. The main Menu screen appears. 2. Select Hold The screen shows the current hold status for each sensor. 3. Select the sensor to be put in hold. Press ENTER. 4.
  • Page 30 8. Press MENU and then EXIT to return to the main display. The following abbreviations are used in the quadrant display: Output Temperature (live) Temperature (manual) Measurement mV (pH) Sensor current (chlorine) Slope Glass impedance (pH) Reference impedance (pH) Emerson.com...
  • Page 31 Reference Manual Display and operation 00809-0100-3412 October 2023 If you have a dual input Rosemount 1056 Transmitter, other abbreviations might appear. Consult the Rosemount 1056 Transmitter Manual for more details. 9. Choose to change the language used in the display. Language 10.
  • Page 32 Display and operation Reference Manual October 2023 00809-0100-3412 Emerson.com...

  • Page 33: Programming The Transmitter

    Table 4-1: Default settings Item Choices Default Sensor assignment Sensor 1 Chlorine Chlorine Sensor 2 Outputs Assignments (if Rosemount FCL-01) a. Output 1 Chlorine, temperature Chlorine b. Output 2 Chlorine, temperature Temperature 2. Assignments (if FCL-02) a. Output 1 Chlorine, pH, temperature Chlorine b.
  • Page 34 Automatic Security code 1. Calibrate/Hold 000 to 999 2. Program/Display 000 to 999 pH sensor diagnostic limits 1. Reference offset 0 to 9999 mV 60 mV 2. Diagnostics on or off 3. Glass impedance on or off temperature correction Emerson.com...
  • Page 35 Reference Manual Programming the transmitter 00809-0100-3412 October 2023 (continued) Table 4-1: Default settings Item Choices Default 4. Glass fault (low impedance) 0 to 9999 MΩ 10 MΩ 5. Glass fault (high impedance) 0 to 9999 MΩ 1500 MΩ 6. Reference fault (high 0 to 9999 kΩ...

  • Page 36: Configuring, Ranging, And Simulating Outputs

    (between 0.00 and 22.00 mA) when a fault occurs. means the selected output is unaffected when the fault occurs. Live Ranging an The outputs are fully rangeable, including negative numbers. If the output output is logarithmic, assigned values must be positive. Emerson.com...
  • Page 37 Reference Manual Programming the transmitter 00809-0100-3412 October 2023 4.3.3  Configure outputs Complete the following steps to configure the analog current outputs. Procedure 1. Press MENU. The main Menu screen appears. 2. Move the cursor to and press ENTER. Program The cursor is on Outputs 3.
  • Page 38 Complete the following steps to range the outputs by assigning values to the low and high outputs. Procedure 1. Press MENU. The main Menu screen appears. 2. Move the cursor to and press ENTER. Program The cursor is on Outputs Emerson.com...
  • Page 39 Reference Manual Programming the transmitter 00809-0100-3412 October 2023 3. Press ENTER. 4. Choose Range 5. Choose Output 1 Output 2 The screen shows the present settings for the outputs. is output 1, is output 2, is sensor 1, and is sensor 2. 6.
  • Page 40 2. Move the cursor to and press ENTER. Program The cursor is on Outputs 3. Press ENTER. 4. Choose Simulate 5. Choose Output 1 Output 2 6. Enter the desired simulated output current. 7. To end the simulated current, press MENU or EXIT. Emerson.com...

  • Page 41: Configuring Alarms And Assigning Setpoints

    Reference Manual Programming the transmitter 00809-0100-3412 October 2023 4.4  Configuring alarms and assigning setpoints 4.4.1  Purpose of configuring alarms and setpoints This section describes how to configure and assign setpoints to the alarm relays, simulate alarm action, and synchronize interval timers. Note Configure the alarms first.
  • Page 42 Figure 4-3 shows how the timer timer operates. While the interval timer is operating, the main display, analog outputs, and assigned alarms for the sensor(s) can be put on hold. During hold, the main display remains at the last value. Emerson.com...
  • Page 43 Reference Manual Programming the transmitter 00809-0100-3412 October 2023 Figure 4-3: Operation of the interval timer The numbers in parentheses are the allowed values for each timer parameter. A. On time duration (0 - 999 sec) B. On (relay activated) C. Timer interval (0 - 999.9 hr) D.
  • Page 44 To view the remaining items, scroll to the bottom of the screen and continue scrolling. 6. To make a change, move the cursor to the desired line and press ENTER. A screen appears in which the present setting can be edited. 7. Press ENTER to store the setting. Emerson.com...
  • Page 45 Reference Manual Programming the transmitter 00809-0100-3412 October 2023 For an explanation of terms, see Purpose of configuring alarms and setpoints Definitions of alarms and setpoints. 8. To return to the main display, press MENU and then EXIT. 4.4.4  Simulate alarms Complete the following steps to make the transmitter energize or de-energize an alarm relay.
  • Page 46 A screen appears in which the present setting can be edited. 5. Press ENTER to store the setting. For an explanation of terms, see Purpose of configuring alarms and setpoints Definitions of alarms and setpoints. 6. To return to the main display, press MENU and then EXIT. Emerson.com...

  • Page 47: Configuring Measurement

    Generally, if the pH changes more than about 0.2 units over short periods of time, Emerson recommends continuous (live) pH correction. If the pH is Rosemount FCL 1056...
  • Page 48 FCL-02 has low reference impedance. 4.5.4  Configure chlorine measurement Complete the following steps to configure the transmitter to measure free chlorine. Procedure 1. Press MENU. The main Menu screen appears. 2. Move the cursor to and press ENTER. Program Emerson.com...
  • Page 49 Reference Manual Programming the transmitter 00809-0100-3412 October 2023 3. Choose Measurement The screen below appears only if you have a Rosemount FCL-02. 4. Choose (chlorine) or (pH). Sensor 1 Sensor 2 The screen summarizes the present configuration for sensor 1 (chlorine). If you have an FCL-02, the items are Measure Units...

  • Page 50: Configuring Temperature Related Settings

    In manual temperature compensation, the transmitter converts temperature measured voltage to pH using the temperature you enter. It does not compensation use the actual process temperature. Do not use manual temperature compensation unless the process temperature varies no more than Emerson.com...

  • Page 51: Configuring Security Settings

    Reference Manual Programming the transmitter 00809-0100-3412 October 2023 about ±2 °C. Manual temperature correction is useful if the sensor temperature element has failed and a replacement is not available. 4.6.4  Configure temperature related settings Complete the following steps to set the temperature units and to select automatic or manual temperature correction.
  • Page 52 A screen appears in which the present setting can be edited. 5. Press ENTER to store a change. The security code takes effect two minutes after pressing ENTER. 6. To return to the main display, press MENU and then EXIT. Emerson.com...

  • Page 53: Setting Up Diagnostics

    Reference Manual Programming the transmitter 00809-0100-3412 October 2023 4.8  Setting up diagnostics 4.8.1  Purpose of diagnostic setup Note Diagnostic setup applies only to pH sensors. It appears only if you are using the Rosemount FCL-02. This section describes how to do the following: 1.

  • Page 54: Resetting The Transmitter

    4. To make a change, move the cursor to the desired line and press ENTER. A screen appears in which the present settings can be edited. Emerson recommends that you set the settings to the values in the table.
  • Page 55 Reference Manual Programming the transmitter 00809-0100-3412 October 2023 3. Scroll to the bottom of the screen and continue scrolling until Reset Analyzer highlighted. Press ENTER. 4. Choose whether to reset all user-entered values ( ), sensor Factory Defaults calibration ( ), or output calibration ( Sensor Cal Only Output Cal Only If you choose...
  • Page 56 Programming the transmitter Reference Manual October 2023 00809-0100-3412 Emerson.com...

  • Page 57: Chapter 5 Calibration

    Reference Manual Calibration 00809-0100-3412 October 2023 5  Calibration 5.1  Calibrate menu The Calibrate menu allows you to do the following: 1. Calibrate the temperature sensing element in the chlorine and pH sensors. 2. Calibrate the pH sensor. Four methods are available: a.

  • Page 58: Free Chlorine Calibration

    (zero standard) and to a solution containing a known amount of free chlorine (full-scale standard). Note A zero calibration is critical when attempting to measure near the limit of detection for the sensor. In a process measuring > 0.5 ppm, it may not be necessary Emerson.com...
  • Page 59 Reference Manual Calibration 00809-0100-3412 October 2023 Figure 5-1: Sensor current as a function of free chlorine concentration full scale B. Sensor current zero D. Chlorine, ppm E. Slope = sensor current/ppm chlorine F. Full scale standard stnd Any of the following makes a good zero standard: •...
  • Page 60 (occasionally as long as overnight) to reach a minimum zero current. Note Do not start the zero routine until the sensor has been in the zero solution for at least two hours. 4. Press MENU. The main Menu screen appears. The cursor is on Calibrate 5. Press ENTER. Emerson.com...
  • Page 61 Reference Manual Calibration 00809-0100-3412 October 2023 6. Choose the sensor you wish to calibrate. is the chlorine sensor. (if present) is the pH sensor. Sensor 1 Sensor 2 7. Choose Free Chlorine 8. Choose Zero Cal The transmitter automatically starts the zero calibration. If the zero calibration was successful, then the following screen appears.
  • Page 62 The main Menu screen appears. The cursor is on Calibrate 5. Press ENTER. 6. Choose the sensor you wish to calibrate. is the chlorine sensor. (if present) is the pH sensor. Sensor 1 Sensor 2 7. Choose Free Chlorine Emerson.com...
  • Page 63 Reference Manual Calibration 00809-0100-3412 October 2023 8. Choose In Process Cal 9. Follow the screen prompts. Once the reading is stable, press ENTER. Take the sample and press ENTER. At this point, the transmitter stores the present sensor current and temperature and uses those values in calibration.

  • Page 64: Ph Calibration

    Buffer list Buffer pH Standard • 1.68 • 3.56 • 3.78 • 4.01 • 4.64 • 6.86 • 7.01 • 7.41 • 9.18 • 10.01 • 12.45 DIN19267 • 1.09 • 3.06 • 4.65 • 6.79 • 9.23 • 12.75 Emerson.com...
  • Page 65 The transmitter also measures noise and drift and does not accept calibration data until readings are stable. Stability criteria are user- programmable. The use of automatic buffer calibration minimizes errors, and Emerson strongly recommends its use. In manual calibration, you must enter the pH value of the buffer at...
  • Page 66 0.02 pH change in 10 seconds. The stability settings are programmable. 5.4.3  Autocalibrate pH sensor Procedure 1. Obtain two buffer solutions. Ideally, the buffer pH values should bracket the range of pH to be measured. Emerson.com...
  • Page 67 Reference Manual Calibration 00809-0100-3412 October 2023 2. Remove the sensor from the flow cell. If the process and buffer temperatures are appreciably different, place the sensor in a container of tap water at the buffer temperature. Do not start the calibration until the sensor has reached the buffer temperature. 3.
  • Page 68 1. Place the sensor in the flow cell. Wait until pH readings are stable. 2. Press MENU. The main Menu screen appears. The cursor is on Calibrate 3. Press ENTER. 4. Choose the sensor you wish to calibrate. is the chlorine sensor. is the pH sensor. Sensor 1 Sensor 2 5. Choose Emerson.com...

  • Page 69: Calibrating Analog Outputs

    5.5.1  Trimming analog outputs Although Emerson calibrates the analog outputs at the factory, you can trim them in the field to match the reading from a standard milliameter. You can trim both the low (0 or 4 mA) and high (20 mA) outputs.
  • Page 70 If the user entered value is more than ±1 mA different from the nominal value, a possible error screen appears. 7. To force the transmitter to accept the calibration, choose 8. To return to the main display, press MENU and then EXIT. Emerson.com...

  • Page 71: Chapter 6 Digital Communications

    Reference Manual Digital communications 00809-0100-3412 October 2023 6  Digital communications The transmitter supplied with the Rosemount FCL does not have the digital communications option. Rosemount FCL 1056...
  • Page 72 Digital communications Reference Manual October 2023 00809-0100-3412 Emerson.com...

  • Page 73: Chapter 7 Maintenance

    Reference Manual Maintenance 00809-0100-3412 October 2023 7  Maintenance 7.1  Replace sensor circuit board The Rosemount 1056 transmitter used with the FCL requires little routine maintenance. Clean the transmitter case and front panel by wiping with a clean soft cloth dampened with water only.
  • Page 74 Do not use tissues to clean the membrane. 7.2.3  Replace the electrolyte solution and membrane  WARNING Harmful substance Fill solution may cause irritation. May be harmful if swallowed. Read and follow the instructions. Procedure 1. Unscrew the membrane retainer. Emerson.com...
  • Page 75 Reference Manual Maintenance 00809-0100-3412 October 2023 2. Remove the membrane assembly and O-ring. Figure 7-1. Figure 7-1: Chlorine sensor parts A. Membrane retainer B. Membrane assembly C. O-ring D. Cathode E. Electrolyte fill plug (wrap with pipe tape) F. Pressure equalizing port G.

  • Page 76: Ph Sensor

    Generally, the sensor needs maintenance when the response becomes sluggish or noisy. In clean water, the typical cleaning frequency is once a month. In water containing large amounts of suspended solids, for example, open recirculating cooling water, cleaning frequency will be substantially greater. Emerson.com...

  • Page 77: Constant Head Flow Controller

    7.4.3  Other maintenance Table 7-2 Figure 7-2 show the replacement parts for the flow controller assembly used in the Rosemount FCL-01. Table 7-3 Figure 7-3 show replacement parts for the flow controller assembly used in the FCL-02. Rosemount FCL 1056...
  • Page 78 O-ring kit, two 2-222 and one 2-024 silicone O-rings with lubricant 33812-00 Dust cap for constant head flow controller 9322032 Elbow, ¼-in. FNPT x ¼-in. OD tubing 9350029 Check valve, ¼-in. FNPT 33823-00 Outside tube for constant head device 24035-00 Flow train for FCL-01 (includes panel) Emerson.com...
  • Page 79 Reference Manual Maintenance 00809-0100-3412 October 2023 Figure 7-3: FCL-02 constant head flow controller assembly replacement parts Table 7-3: FCL-02 constant head flow controller assembly replacement parts Location in Description Figure 7-3 24039-00 Flow cell for chlorine sensor with bubble shedding nozzle 24039-01 Flow cell for pH sensor 24040-00...
  • Page 80 Maintenance Reference Manual October 2023 00809-0100-3412 Emerson.com...

  • Page 81: Chapter 8 Troubleshooting

    Reference Manual Troubleshooting 00809-0100-3412 October 2023 8  Troubleshooting 8.1  Overview of troubleshooting When the transmitter identifies a problem, the word warning or fault appears intermittently in the lower line the display. When the fault or warning message appears, press DIAG for more information. Read and troubleshoot Fault and Warning messages.

  • Page 82: Troubleshooting When A Fault Message Is Showing

    This error message means the sensor board software is not supported by the main board software. Potential cause Either the sensor board or the main software board is too old. The main board can only be replaced at the factory. Emerson.com...
  • Page 83 00809-0100-3412 October 2023 Recommended actions 1. Call the factory for assistance. Emerson will ask for the main and sensor board revision numbers. 2. To read the main board revision, press DIAG and scroll down until Inst SW is showing. 3. To view the sensor board revision, press DIAG, choose the appropriate sensor, and scroll down until is showing.
  • Page 84 (CPU) on the sensor board is bad. Recommended actions 1. Cycle power off and then on. 2. Replace the sensor board. 8.3.9  Sensor ADC error There is a bad component on the sensor board. Emerson.com...
  • Page 85 Reference Manual Troubleshooting 00809-0100-3412 October 2023 Recommended action Replace the sensor board. 8.3.10  Sensor RTD Out of Range Both the chlorine and pH sensor contain a Pt 100 RTD for measuring temperature. Alert If the measured resistance is outside the expected range, the transmitter displays the error message.

  • Page 86: Troubleshooting When A Warning Message Is Showing

    Recommended actions 1. Confirm that the pH sensor is plugged into the Variopol (VP) cable labeled sensor 2. Verify wiring (Wire sensor) and that preamplifier location is set to transmitter 3. Replace the pH sensor. Emerson.com...
  • Page 87 Reference Manual Troubleshooting 00809-0100-3412 October 2023 8.4.4  Sensor Negative Reading This warning message applies to the chlorine sensor only. The transmitter converts the raw sensor current to ppm chlorine by subtracting the zero current from the raw current and multiplying the result by a conversion factor. If the zero current is larger than the raw current, the result will be negative.

  • Page 88: Troubleshooting When No Error Message Is Showing - Chlorine

    2. Make sure that the conductivity of the zero solution is greater than 50 µS/cm. NOTICE Do not use deionized or distilled water to zero the sensor. If a zero solution is being prepared on site, ensure there is more than 0.5 g of sodium chloride per liter of water. Emerson.com...
  • Page 89 Reference Manual Troubleshooting 00809-0100-3412 October 2023 3. To ensure electrolyte flow from the sensor reservoir to the space between the cathode and membrane, hold the sensor vertically and sharply shake several times. a) If shaking does not work, try clearing the holes around the cathode stem. b) Unscrew the membrane retainer and remove the membrane assembly.
  • Page 90 If bubbles are visible, confirm that they are blocking the membrane by removing the sensor from the flow cell and replacing it. Removing the sensor breaks the bubbles, so when you replace the sensor, readings return to normal. Emerson.com...
  • Page 91 Reference Manual Troubleshooting 00809-0100-3412 October 2023 b) Confirm that the nozzle is properly positioned in the flow cell. Line up your eye with the bottom of the membrane retainer. No gap should be visible between the end of the nozzle and membrane retainer.

  • Page 92: Troubleshooting When No Error Message Is Showing - Ph

    Using auto calibration helps avoid calibration errors caused by temperature drift. The transmitter will not update readings unless the drift is less than 0.02 pH over 10 seconds. 3. Make sure correct pH values were entered during manual calibration. Emerson.com...
  • Page 93 Reference Manual Troubleshooting 00809-0100-3412 October 2023 Using auto calibration eliminates errors caused by improperly entering data. 4. Make sure the sensor is properly wired to the transmitter. Wire sensor. 5. Check if the sensor is dirty or coated. Clean the pH sensor.
  • Page 94 Check the following: Recommended actions 1. Confirm a ground loop. a) Verify that the system works properly in buffers. Be sure there is no direct electrical connection between the buffer containers and the process liquid or piping. Emerson.com...
  • Page 95 Reference Manual Troubleshooting 00809-0100-3412 October 2023 b) Strip back the ends of a heavy gauge wire. Connect one end of the wire to the process piping or place it in the process liquid. Place the other end of the wire in the container of buffer with the sensor. The wire makes an electrical connection between the process and sensor.

  • Page 96: Troubleshooting When No Error Message Is Showing - General

    3. Make sure the standard temperature sensor is submerged to the correct level. 4. Review Calibrate temperature. 8.7.2  Current output too low Load resistance is too high. Maximum load is 550 Ω. 8.7.3  Alarm relays don't work Recommended action Verify the relays are properly wired. Emerson.com...

  • Page 97: Simulate Chlorine Inputs

    Reference Manual Troubleshooting 00809-0100-3412 October 2023 8.8  Simulate chlorine inputs To check the performance of the transmitter, use a decade box and 1.5 V battery to simulate the current from the sensor. The battery, which opposes the polarizing voltage, is necessary to ensure that the sensor current has the correct sign. Procedure 1.

  • Page 98: Simulate Ph Input

    Set the voltage source to the value shown in the table and verify that the pH and millivolt readings match the values in Table 8-4 Table 8-4: Voltage and pH Voltage (mV) pH (at 77 °F [25 °C]) 295.8 2.00 177.5 4.00 Emerson.com...

  • Page 99: Simulating Temperature

    Reference Manual Troubleshooting 00809-0100-3412 October 2023 (continued) Table 8-4: Voltage and pH Voltage (mV) pH (at 77 °F [25 °C]) 59.2 6.00 -59.2 8.00 -177.5 10.00 -295.8 12.00 8.10  Simulating temperature 8.10.1  General information about simulating temperature The transmitter accepts a Pt100 resistance temperature device. The Pt100 RTD is a three- wire configuration.
  • Page 100 (10.0 °C) is the same as the difference between the simulated temperatures, the transmitter is working correctly. Table 8-5: Temperature and resistance Temperature (°C) Pt 100 (Ω) 100.0 103.9 107.8 109.7 111.7 115.5 119.4 123.2 127.1 Emerson.com...
  • Page 101 Reference Manual Troubleshooting 00809-0100-3412 October 2023 (continued) Table 8-5: Temperature and resistance Temperature (°C) Pt 100 (Ω) 130.9 132.8 134.7 138.5 Rosemount FCL 1056...
  • Page 102 Emerson Terms and Conditions of Sale are available upon request. The Emerson logo is a trademark and service mark of Emerson Electric Co. Rosemount is a mark of one of the Emerson family of companies. All other marks are the property of their respective owners.

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