Instruction Manual PN 51-1181PB/rev.
ESSENTIAL INSTRUCTIONS DANGER HAZARDOUS AREA INSTALLATION 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.
Model 1181 PB TABLE OF CONTENTS MODEL 1181 PB TWO-WIRE TRANSMITTER TABLE OF CONTENTS Section 1.0 1.1 1.2 1.3 1.4 1.5 Title DESCRIPTION AND SPECIFICATIONS ............................................. Features and Applications .................................................................... Physical Specifications – General ........................................................ Performance Specifications – General ................................................. Performance Specifications at 25°C..
Model 1181 PB TABLE OF CONTENTS TABLE OF CONTENTS (CONT'D) LIST OF FIGURES Section 2-1 2-2 2-3 2-4 2-4 2-4 2-5 2-6 2-7 3-1 3-2 3-3 3-4 5-1 6-1 8-1 8-2 9-1 Title Mounting and Dimensional Drawing..................................................... Schematic System, FM Explosion Proof Approved .............................. Transmitter Wiring ................................................................................ Schematic System, FM I.S. Approved - Entity (1 of 3) .........................
MODEL 1181 PB SECTION 1.0 GENERAL DESCRIPTION AND SPECIFICATIONS SECTION 1.0 DESCRIPTION AND SPECIFICATIONS • TWO-WIRE FIELD MOUNTED TRANSMITTERS. Ideal for multiple loop installations where central data processing and control are required. Field mounting near the sensor for ease in routine calibration. • NEMA 4X WEATHERPROOF, CORROSION-RESISTANT, DUAL COMPARTMENT HOUSING provides maximum circuit protection for increased reliability in industrial environments. • HAZARDOUS AREA INSTALLATION.
MODEL 1181 PB 1.2 PHYSICAL SPECIFICATIONS – GENERAL Enclosure: NEMA 4X, weatherproof and corrosionresistant, NEMA 7B, explosion proof Hazardous Area Classification - Explosion Proof: FM: Class I, Groups B, C, & D, Div. 1 Class II, Groups E, F, & G, Div. 1 Class III CSA: Class I, Groups C, & D Class II, Groups E, F, & G Class III, Encl 4 Class I, Groups A, B, C & D. Div. 2 Encl 4, Factory Sealed Hazardous Area Classification - Intrinsic Safety: FM: Class I, II & III, Div.
MODEL 1181 PB SECTION 1.0 DESCRIPTION AN SPECIFICATIONS The Model 1181PB Transmitter measures dissolved oxygen in parts per billion. Switch selectable ranges are 0-50, 0-100, and 0-200 ppb with air calibrate. RECOMMENDED SENSORS: Rosemount Analytical, La Habra, CA : Model 120012 (P/N 639900) Rechargeable 1.4 PERFORMANCE SPECIFICATIONS @ 25°C Measurement Range: 0-50, 0-100, & 0-200 ppb Accuracy: ±1.0% full scale Stability: ±1.0% full scale/month, non-cumulative Repeatability: ±1.
MODEL 1181 PB SECTION 2.0 INSTALLATION SECTION 2.0 INSTALLATION 2.1 UNPACKING AND INSPECTION. Before opening the shipping carton, inspect the outside of the carton for any damage. If damage is detected, contact the carrier immediately. If there is no apparent damage, open the carton and inspect the instrument and hardware. Make sure all the items in the packing list are present and in good condition. Notify the factory if any part is missing.
MODEL 1181 PB SECTION 2.0 INSTALLATION 2.4 WIRING-GENERAL. The transmitter is equipped with two (2) ¼ -inch conduit openings, one on each side of the housing. One is for the power supply/signal wiring and the other is for the sensor wiring. The use of waterproof cable glands or conduit is recommended to prevent moisture from entering the housing. If conduit is used, it should be positioned to prevent condensation from draining into the housing.
MODEL 1181 PB 2.6 DISSOLVED OXYGEN SENSOR. The sensor should be installed in San environment where the temperature remains between 0 and 44°C (32-110°F). It is used in combination with the 627866 flow chamber and should be mounted as described in the following sections. 2.6.1 Installation Procedure. The sensor is shipped assembled and charged, ready for use.
MODEL 1181 PB SECTION 2.
DWG. NO. FIGURE 2-2. Schematic System, F.M. Explosion Proof Approved 8 C REV. SECTION 2.
MODEL 1181 PB SECTION 2.0 INSTALLATION Power Wiring (TB1) TB1-1, Loop Signal [Power Supply (+)VDC]* TB1-2, Meter (+) Red TB1-3, Loop Signal [Power Supply (-) VDC]* /Meter (-) * 4-20 mADC Sensor Wiring (TB2) TB2-1 TC Element (Brown) TB2-2 Shield TB2-3, Gold Cathode (Black) and T. C. Element (Blue) TB2-4, Silver Anode (Red) Note: The white and green wires of the sensor cable are not used and should be cut back away from the terminal connections of the 1181. FIGURE 2-3.
MODEL 1181 PB SECTION 2.0 INSTALLATION FIGURE 2-4. Schematic System, F.M. I.S.
MODEL 1181 PB SECTION 2.0 INSTALLATION FIGURE 2-4. Schematic System, F.M. I.S.
MODEL 1181 PB SECTION 2.0 INSTALLATION FIGURE 2-4. Schematic System, F.M. I.S.
DWG. NO. 1400157 ANY CHANGE TO THIS DRAWING MAY AFFECT CSA APPROVAL 1. NOTES: UNLESS OTHERWISE SPECIFIED SENSOR ASSEMBLIES IN THIS SYSTEM ARE LOW ENERGY NON INCENTIVE DEVICES WHICH DO NOT CONTAIN MAKE/BREAK CONTACTS OR COMPONENTS WHICH PRODUCE OR STORE MORE THAN 1.2V, 0.1A, 25mW OR 20 µJ.
MODEL 1181 PB SECTION 2.0 INSTALLATION FIGURE 2-6.
MODEL 1181 PB SECTION 2.0 INSTALLATION FIGURE 2-7 .
MODEL 1181 PB SECTION 3.0 DESCRIPTION OF CONTROLS SECTION 3.0 DESCRIPTION OF CONTROLS 3.1 DESCRIPTION OF CONTROLS. 3.1.1 Range Selector Switch. A set of five (5) dip switches used for selecting the 1181PB measurement ranges (0-50, 0-100, 0-200PB). The Air Calibrate position is used during Start Up, Periodic Maintenance or Troubleshooting (see Figure 3-1). 3.1.2 Coarse Span Adjust.
MODEL 1181 PB SECTION 3.0 DESCRIPTION OF CONTROLS FIGURE 3-2.
MODEL 1181 PB SECTION 3.0 DESCRIPTION OF CONTROLS FIGURE 3-3.
MODEL 1181 PB SECTION 3.0 DESCRIPTION OF CONTROLS FIGURE 3-4.
MODEL 1181 PB SECTION 4.0 CONFIGURATION SECTION 4.0 CONFIGURATION 4.1 GENERAL The Model 1181PB is factory calibrated to measure 0-200 ppb dissolved oxygen corresponding to a 4-20 mA. The optional LCD display is calibrated to 0-100% corresponding to 4-20 mA. 4.5 DIGITAL DISPLAY. The digital display is factory calibrated to indicate 0-100% corresponding to 420mA and is provided with independent zero and span potentiometers. NOTE Do not attempt to adjust any sealed adjustment pots.
MODEL 1181PB SECTION 5.0 START UP, AND CALIBRATION SECTION 5.0 START UP AND CALIBRATION 5.1 GENERAL. This section provides the start-up and calibration procedure for the Model 1181PB two-wire transmitter. The Transmitter is used in conjunction with the PB sensor assembly. 5.3 AIR CALIBRATION. To initially calibrate the Transmitter/Sensor loop for response oxygen partial pressure, use the following procedure: 1. Expose the sensor to ambient air. The membrane must be clean and dry.
MODEL 1181PB SECTION 5.0 START UP, AND CALIBRATION 5.3.2 Air Calibration Adjustment for Transmitters with LCD Digital Display (Code 06). 1. Adjust the COURSE SPAN ADJUST POT (see Figure 5-1) to obtain a transmitter output calculated from the local barometric pressure as follows (see note in Section 5.3.1 on converting barometric pressure in inches of mercury (inHg) to millimeters of Mercury (mmHg): Barometric Pressure (mmHg) Output(mA) = __________________________ + 4.0 62.5 2.
MODEL 1181 PB SECTION 6.0 THEORY OF OPERATION SECTION 6.0 THEORY OF OPERATION 6.1 MODEL 1181PB. The Model 1181PB Two-Wire Transmitter automatically and continuously measures low-level concentrations of dissolved oxygen in water or aqueous solutions. The determination is based on the measurement of the electrical current developed by the dissolved oxygen measurement sensor in contact with the sample. This theory of operation is illustrated below (see Figure 6-1 Simplified Block Diagram). 6.1.
MODEL 1181 PB 6.2 DISSOLVED OXYGEN MEASUREMENT SENSOR Rosemount Analytical utilizes the amperometric membrane technique for the measurement and control of dissolved oxygen. The success of membrane electrodes stems from the isolation of the electrodes (cathode and anode) and electrolyte from the sample by means of a semi-permeable membrane. This membrane protects the electrodes from contamination by restricting the flow of sample to gases only, and oxygen in particular.
MODEL 1181 PB SECTION 6.0 THEORY OF OPERATION Since dry air contains 20.95 oxygen by volume, regardless of the barometric pressure, the partial pressure of oxygen can be shown to be directly proportional to the total barometric pressure, according to Dalton’s law of partial pressures. Thus for dry air, if the total barometric pressure is known, the partial pressure of oxygen can be computed. However, this procedure is valid only for dry air conditions.
MODEL 1181PB SECTION 7.0 DISASSEMBLY/ASSEMBLY PROCEDURE SECTION 7.0 DISASSEMBLY/REASSEMBLY PROCEDURE 7.1 DISASSEMBLY PROCEDURE. Disconnect the power to the transmitter prior to disassembly. (see Figure 9-1 for item numbers also see Figure 3-3). 1. Remove covers (1) and (14) or meter housing cover (11) from housing (3). Save O-rings (2); discard if damaged. 2. Loosen screws retaining the serial label, and then rotate to gain access to the Span and Zero pots. 3.
MODEL 1181 PB SECTION 8.0 TROUBLESHOOTING/MAINTENANCE SECTION 8.0 TROUBLESHOOTING/MAINTENANCE 8.1 GENERAL. This section covers the troubleshooting and maintenance instructions for the Model 1181PB Transmitter and PB DO Sensor. The transmitter has no moving parts and requires minimum maintenance. Procedures for calibrating the Model 1181PB is given in Section 5.0 and generally the only operation type "maintenance" required to keep the units in good operating condition.
MODEL 1181 PB SECTION 8.0 TROUBLESHOOTING/MAINTENANCE 8.3 MAINTENANCE. Most routine maintenance involves the sensor. Sensor maintenance consists of periodic recharging and-cleaning, or rejuvenating the sensor cathode. The usual indication that the sensor requires rejuvenation and recharging is that, during calibration, the correct upscale reading is unobtainable by adjustment of the EXTERNAL SPAN CONTROL.
MODEL 1181 PB 4. 5. 6. SECTION 8.0 TROUBLESHOOTING/MAINTENANCE The membrane assembly consists of a Teflon membrane and three associated parts: a holder, a retainer, and an O-ring. Remove the retainer from the holder by placing a finger into center hole of holder and pressing the fingernail against the inner edge of retainer . Verify that the O-ring is properly positioned in the associated groove in the holder (see Figure 8-2).
MODEL 1181 PB 8.3.2 Rejuvenating The Gold Cathode. Typically, the gold cathode is rejuvenated during the recharging procedure described in Section 8.3.1. In the event that simple recharging does not correct symptoms of low output on the readout meter, clean and/or rejuvenate the cathode as follows: 1. Disassemble the sensor. Remove the cap and membrane assembly. Discard the used electrolyte. Flush the sensor with distilled or deionized water to remove all particulate material. 2.
MODEL 1181 PB SECTION 9.0 SPARE PARTS SECTION 9.0 SPARE PARTS 9.1 SPARE PARTS. (Refer to Figure 9-1 for the following spare parts list for the Model 1181PB. TABLE 9-1. Model 1181PB Two-Wire Transmitter Spare Parts Item No.
MODEL 1181 PB SECTION 9.0 SPARE PARTS FIGURE 9-1.
MODEL 1181PB SECTION 10.0 RETURN OF MATERIAL SECTION 10.0 RETURN OF MATERIAL 10.1 GENERAL. To expedite the repair and return of instruments, proper communication between the customer and the factory is important. The “Return of Materials Request” form is provided for you to copy and use in case the situation arises. The accuracy and completeness of this form will affect the processing time of your materials. 10.2 WARRANTY REPAIR.
RETURN OF MATERIALS REQUEST C U S T O M E R N O T I C E T O FROM: •IMPORTANT! This form must be completed to ensure expedient factory service.
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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