Emerson 381 - Manuals

1 • MOLDED POLYETHERSULFONE (PES) BODY provides compatibility with a variety ofprocesses. • MODULAR DESIGN facilitates maintenance by eliminating terminal and mounting bracketsand extraneous hardware. • INTEGRAL PREAMPLIFIER provides reliable signal transmission. • DOUBLE JUNCTION, GEL-FILLED, REFER...

2 MODEL 381 pH/ORP SECTION 1.0 DESCRIPTION AND SPECIFICATIONS 1.2 SENSOR SPECIFICATIONS Materials of Construction: Body, Cover and Flow Cell: Polyethersulfone (PES).O-Rings: Viton2.Measuring Electrode: Glass (and platinum for Model 381 ORP). Liquid Junction: Kynar3/wood (Code 20) or Kynar/ceramic (C...

3 1.3 ORDERING INFORMATION Model pH/ORP Sensor is housed in a PES body suitable 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 ch...

5 MODEL 381pH/ORP SECTION 2.0 INSTALLATION SECTION 2.0 INSTALLATION 2.1 INSTALLATION. Prepare the sensor for instal lation as follows (see Figure 2-1): 1. Remove the cover from the body by grasping thebody and rotating the cover 1/4 turn counter-clockwise. 2. When the cover breaks loose from the bod...

6 MODEL 381pH/ORP SECTION 2.0 INSTALLATION FIGURE 2-1. Model 381 Sensor Component Locator Diagram

8 MODEL 381pH/ORP SECTION 2.0 INSTALLATION FIGURE 2-2. Submersion Installation Diagram FIGURE 2-3. Insertion Installation Diagram

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

14 MODEL 381pH/ORP SECTION 2.0 INSTALLATION 2.9.2 Calibration CAUTION The solution used during the following checkis an acid and should be handled with care.Follow the directions of the acid manufactur-er. Wear the proper protective equipment. Donot let the solution come in contact with skinor cloth...

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 determiningthe cause of a malfunction (troubleshooting). 3.2 PERIODIC MAINTENANCE. The following period- ic maintenance is based on operation...

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 typesof standard solutions which may be used to check theORP electrode/transmitter system. Type 1: One type of commonly used ORP standard solutio...

18 3.4 PREAMPLIFIER TROUBLESHOOTING. To 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 thebody and rotating the cover 1/4 turn in the count-er-clockwise direction. 3. When the cover breaks loose from t...

21 MODEL 381pH/ORP SECTION 4.0 ULTRASONIC CLEANER SECTION 4.0 ULTRASONIC CLEANER 4.1 ULTRASONIC CLEANER (P/N 22727-00). This accessory provides an ultrasonic cleaner and mount-ing hardware for either continuous or inter-mittentcleaning of the measuring electrode and liquid junctionon the Model 381. ...

22 4.4 Operation (continued) NOTE When the ultrasonic cleaner is used onsome slurry applications (such as car- bon-ates and phosphates), continuous ultra-sonic cleaning is not recommended as thismay tend to compact the solids of the slur-ry on the electrode into a hard, cement likecoating. Instead, ...

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

25 MODEL 381 SECTION 5.0 RETURN OF MATERIAL SECTION 5.0 RETURN OF MATERIAL 5.1 GENERAL. To expedite the repair and return of instruments, proper communication between the cus-tomer and the factory is important. The “Return ofMaterials Request” form is provided for you to copy anduse in case the situ...

FROM: RETURN BILL TO: _____________________________ _____________________________ _____________________________ _____________________________ _____________________________ _____________________________ _____________________________ _____________________________ _____________________________ CUSTOMER...

WARRANTY Goods and part(s) (excluding consumables) manufactured by Seller are warranted to be free from defects 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, e...

Credit Cards for U.S. Purchases Only. 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. 8 Emerson Process Management 2400 Barranca ParkwayIrvine, CA 92606 USATel: (949) 757-8500Fax: (94...