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Emerson 381 manual

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Table of contents for the manual

  • Page 1

    pH/ORP Sensor Instruction Manual PN 51-381/rev .D October 2007 Model 381[...]

  • Page 2

    CAUTION SENSOR/PROCESS APPLICA TION COMP A TIBILITY The wetted sensor materials may not be comp atible with process com - position and operating conditions. Application comp at ibility is entirely the responsibility of the user . DANGER HAZARDOUS AREA INST ALLA TION Installations near flammable liquids or in haz- ardous area locations must be caref[...]

  • Page 3

    MODEL 381 pH/ORP T ABLE OF CONTENTS MODEL 381 pH/ORP SENSOR T ABLE OF CONTENTS Section Title Page 1.0 DESCRIPTION AND SPECIFICA TIONS........................................................... 1 1.1 Features and Applications ................................................................................. 1 1.2 Sensor S pecifications ..............[...]

  • Page 4

    MODEL 381 pH/ORP T ABLE OF CONTENTS MODEL 381 pH/ORP SENSOR LIST OF FIGURES Figure No. Title Page 1-1 Dimensional Drawing ........................................................................................ 3 1-2 Mounting Drawing ............................................................................................. 3 2-1 Model 381 Sensor[...]

  • Page 5

    1 • MOLDED POL YETHERSULFONE (PES) BODY provides compatibility with a variety of processes. • MODULAR DESIGN facilitates maintenance by eliminating terminal and mounting bracket s and extraneous hardware. • INTEGRAL PREAMPLIFIER provides reliable signal transmission. • DOUBLE JUNCTION, GEL-FILLED, REFERENCE CELL provides high temperature pe[...]

  • Page 6

    2 MODEL 381 pH/ORP SECTION 1.0 DESCRIPTION AND SPECIFICA TIONS 1.2 SENSOR SPECIFICA TIONS Materials of Construction: Body , Cover and Flow Cell: Polyethersulfone (PES). O-Rings: Viton 2. Measuring Electrode: Glass (and platinum for Model 381 ORP). Liquid Junction: Kynar 3 /wood (Code 20) or Kynar/ceramic (Code 21). Process Connections: Submersion: [...]

  • Page 7

    3 1.3 ORDERING INFORMA TION Model pH/ORP Sensor is housed in a PES body suit able for insertion, submer- sion or flow through installation. The sensor includes an integral preamplifier , measuring electrode, double junc- tion gel-filled reference cell, automatic temperature compensation for pH, and a choice of two cable lengths of either 15 ft. or [...]

  • Page 8

    4[...]

  • Page 9

    5 MODEL 381pH/ORP SECTION 2.0 INST ALLA TION SECTION 2.0 INST ALLA TION 2.1 INST ALLA TION. Prepare the sensor for inst al lation as follows (see Figure 2-1): 1. Remove the cover from the body by grasping the body and rotating the cover 1/4 turn counter- clockwise. 2. When the cover breaks loose from the body , pull the cover straight out. 3. Lubri[...]

  • Page 10

    6 MODEL 381pH/ORP SECTION 2.0 INST ALLA TION FIGURE 2-1. Model 381 Sensor Component Locator Diagram[...]

  • Page 11

    7 MODEL 381pH/ORP SECTION 2.0 INST ALLA TION 2.3 INSERTION INST ALLA TION (Code 00). T o install the sensor in the side of a tank, in a pipeline, or in a pipe “tee”, proceed as follows (see Figure 2-3): CAUTION Sensor must be installed within 80° of the vertical plane (see Figure 2-3). 1. Use T eflon tape on pipe joint, and inst all sensor as [...]

  • Page 12

    8 MODEL 381pH/ORP SECTION 2.0 INST ALLA TION FIGURE 2-2. Submersion Inst allation Diagram FIGURE 2-3. Insertion Inst allation Diagram[...]

  • Page 13

    9 MODEL 381pH/ORP SECTION 2.0 INST ALLA TION FIGURE 2-4. Flow Through Inst allation Diagram (Code 03 or 04) FIGURE 2-5. Inst allation Details Low Flow Conditions Model 381 (Code 03 and 04)[...]

  • Page 14

    10 FIGURE 2-6. Retro-Fit Kit Code 04 Flow Powered Cleaner , Model 381 MODEL 381pH/ORP SECTION 2.0 INST ALLA TION PRESSURE DROP AND RECOMMENDED FLOW RA TES- FLOW POWERED CLEANER (CODE 04) kPa 240 220 200 180 160 140 120 100 20 15 10 5 POSSIBLE ELECTRODE DAMAGE ABOVE THE THIS POINT PRESSURE DROP RECOMMEND- ED OPERA TING RANGER INEFFECTIVE CLEANING BE[...]

  • Page 15

    11 FIGURE 2-7. Flow Through Diagram and Wiring (Code 03 or 04) DWG . NO. REV . 40038105 L MODEL 381pH/ORP SECTION 2.0 INST ALLA TION WHEN INCH AND METRIC DIMS ARE GIVEN MILLIMETER INCH[...]

  • Page 16

    12 FIGURE 2-8. Remote Junction Box with Internal Preamp DWG . NO. REV . 40038103 J MODEL 381pH/ORP SECTION 2.0 INST ALLA TION WHEN INCH AND METRIC DIMS ARE GIVEN MILLIMETER INCH[...]

  • Page 17

    13 FIGURE 2-9. Wiring with W eatherproof or Div . 2 (Code 52) Junction Box DWG . NO. REV . 40038115 K DWG . NO. REV . 40038116 I MODEL 381pH/ORP SECTION 2.0 INST ALLA TION WHEN INCH AND METRIC DIMS ARE GIVEN MILLIMETER INCH[...]

  • Page 18

    14 MODEL 381pH/ORP SECTION 2.0 INST ALLA TION 2.9.2 Calibration CAUTION The solution used during the following check is an acid and should be handled with care. Follow the directions of the acid manufactur- er . Wear the proper protective equipment. Do not let the solution come in contact with skin or clothing. If contact with skin is made, immedia[...]

  • Page 19

    15 MODEL 381pH/ORP SECTION 3.0 MAINTENANCE SECTION 3.0 MAINTENANCE 3.1 GENERAL. This section provides instructions for performing periodic maintenance and for determining the cause of a malfunction (troubleshooting). 3.2 PERIODIC MAINTENANCE. The following period- ic maintenance is based on operation in a water sam- ple. Determine the schedule for [...]

  • Page 20

    16 MODEL 381pH/ORP SECTION 3.0 MAINTENANCE 3.3 MODEL 381 3.3.1 Platinum Electrode Check. The platinum elec- trode may be checked as follows: There are two types of standard solutions which may be used to check the ORP electrode/transmitter system. T ype 1: One type of commonly used ORP st andard solution is the saturated quinhydrone solution. A com[...]

  • Page 21

    17 T rouble Probable Cause Remedy Meter reads off scale. Reference electrolyte depleted. Replace reference electrolyte as instructed in Section 3.2.2. Defective preamplifier . Check preamplifier as instructed in Section 3.4 and replace preamplifier if defective. T .C. element shorted. Check T .C. element as instructed in Section 3.5, and replace bo[...]

  • Page 22

    18 3.4 PREAMPLIFIER TROUBLESHOOTING . T o deter- mine if the preamplifier is operable, proceed as follows: 1. Remove the sensor from process. 2. Remove the cover from the body by grasping the body and rotating the cover 1/4 turn in the count- er-clockwise direction. 3. When the cover breaks loose from the body , pull straight out on the cover to ex[...]

  • Page 23

    19 RECOMMENDED P ART NUMBER DESCRIPTION CODE QUANTITY 2000734 Liquid junction wood/Kynar 20 2 2000735 Liquid junction ceramic/Kynar 21 2 2001928 O-ring lubricant ALL 2 22692-00 Body , Uniloc standard T .C. 30 22692-03 Body , Pt100 T .C. 31 22692-06 Body w/o T .C. 32 22693-00 Cover , for integral preamp, w/15 ft. cable 40 22693-01 Cover , for remote[...]

  • Page 24

    20[...]

  • Page 25

    21 MODEL 381pH/ORP SECTION 4.0 UL TRASONIC CLEANER SECTION 4.0 UL TRASONIC CLEANER 4.1 UL TRASONIC CLEANER (P/N 22727-00). This accessory provides an ultrasonic cleaner and mount- ing hardware for either continuous or inter-mittent cleaning of the measuring electrode and liquid junction on the Model 381. The information in the following paragraph i[...]

  • Page 26

    22 4.4 Operation (continued) NOTE When the ultrasonic cleaner is used on some slurry applications (such as car- bon- ates and phosphates), continuous ultra- sonic cleaning is not recommended as this may tend to compact the solids of the slur- ry on the electrode into a hard, cement like coating. Instead, it is recommended that a shock-type treatmen[...]

  • Page 27

    23 FIGURE 4-1. Model 381 Ultrasonic Cleaner and Wiring DWG . NO. REV . 40038156 F MODEL 381pH/ORP SECTION 4.0 UL TRASONIC CLEANER WHEN INCH AND METRIC DIMS ARE GIVEN MILLIMETER INCH[...]

  • Page 28

    24 FIGURE 4-2. Dimensional and Component Locator Ultrasonic Generator MODEL 381pH/ORP SECTION 4.0 UL TRASONIC CLEANER WHEN INCH AND METRIC DIMS ARE GIVEN MILLIMETER INCH DWG . NO. REV . 40037505 D[...]

  • Page 29

    25 MODEL 381 SECTION 5.0 RETURN OF MA TERIAL SECTION 5.0 RETURN OF MA TERIAL 5.1 GENERAL. T o expedite the repair and return of instruments, proper communication between the cus- tomer 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 completen[...]

  • Page 30

    FROM: RETURN BILL T O: _____________________________ _____________________________ _____________________________ _____________________________ _____________________________ _____________________________ _____________________________ _____________________________ _____________________________ CUSTOMER/USER MUST SUBMIT MA TERIAL SAFETY SHEET (MSDS) O[...]

  • Page 31

    W ARRANTY Goods and part(s) (excluding consumables) manufactured by Seller are warranted to be free from defect s in workman- ship and material under normal use and service for a period of twelve (12) months from the date of shipment by Seller . Consumables, pH electrodes, membranes, liquid junctions, electrolyte, O-rings, etc. are warranted to be [...]

  • Page 32

    Credit Cards for U.S. Purchases Only . The right people, the right answers, right now . ON-LINE ORDERING NOW A V AILABLE ON OUR WEB SITE http://www .raihome.com Specifications subject to change without notice. Emerson Process Management Liquid Division 2400 Barranca Parkway Irvine, CA 92606 USA T el: (949) 757-8500 Fax: (949) 474-7250 http://www .r[...]