Instruction/ maintenance manual of the product 142 Emerson
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Models 140, 141, and 142 Conductivity Sensors Instruction Sheet PN 51A-140/rev .E December 2010 SENSOR SPECIFICA TIONS For additional information, please visit our website at www .
Keep 1/4 inch (6 mm) clearance between electrodes and piping. The electrodes must be completely sub- merged in the process liquid, i.e., to the level of the threaded connection. See Figure 1 for recommended orientation. If the sensor is installed in a side stream with the sample draining to open atmosphere, bubbles may accumulate on the electrodes.
3 MODEL 140,141, and 142 sensors INST ALLA TION FIGURE 3. Inst alling model 141 sensor DWG . NO. REV . 40014204 B INST ALLA TION – 141 SENSOR 1. Install the sensor in a 3/4-inch NPT weldalet or in a 1-inch pipe tee. 2. Remove the plastic shipping cap from the sensor .
RTD RTD in RTD sense RTD return MODEL 140,141, and 142 sensors WIRING WIRING All 140 series sensors have a junction box mounted on the back of the sensor . Wiring connections in the junction box are shown in Figure 5. Figure 5. Sensor junction box wiring.
5 MODEL 140,141, and 142 sensors WIRING FIGURE 8. Model Xmt-C-10 Wiring (Panel) FIGURE 9. Model Xmt-C-1 1 Wiring (Pipe or Wall) RCV B RCV A RSHLD DRVB RTN SENSE RTD IN SHLD CLEAR WHITE/RED RED DRV A DSHLD WHITE CLEAR GRA Y ORANGE CLEAR TB1 TB2 FIGURE 10.
RETRACTING AND INSERTING THE MODEL 140 SENSOR RETRACTING THE SENSOR 1. Push in on the sensor junction box and slowly loosen the sensor compression fitting nut by reversing the sensor tightening procedure illustrated in Figure 2.
MODEL 140,141, and 142 sensors WIRING 7 3. Slowly open the valve. 4. Insert the sensor up to the desired insertion depth and turn the sensor compression fitting nut until it is finger tight. 5. Position the entire sensor for easy access to the ball valve handle, sensor compression fitting nut and J-box terminal block.
MODEL 140,141, and 142 sensors CALIBRA TION 8 CALIBRA TION Model 140 sensors are not calibrated at the factory . The cell const ant on the label is a nominal value only .
9 MODEL 140,141, and 142 sensors MAINTENANCE MAINTENANCE CLEANING THE SENSOR Use a warm detergent solution and a soft brush or pipe cleaner to remove oil and scale. Isopropyl alcohol can also be used to remove oily films. Avoid using strong mineral acids to clean conductivity sensors.
10 MODEL 140,141, and 142 sensors ACCESSORIES PN Description 23724-00 Ball valve kit for Model 140 sensor 23730-00 Process compression fitting kit (3/4-inch NPT) for Model 140 sensor 23731-00 Process .
11 TROUBLESHOOTING PROBLEM PROBABLE CAUSE SOLUTION Off-scale reading Wiring is wrong. V erify wiring. T emperature element is open or shorted. Check temperature element for open or short circuits. See Figure 14. Sensor is not in the process stream. Be sure the sensor is completely submerged in the process stream.
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. 8 Emerson Process Management 2400 Barranca Parkway Irvine, CA 92606 USA T el: (949) 757-8500 Fax: (949) 474-7250 http://www .
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If you have not bought Emerson 142 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Emerson 142 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Emerson 142 you will learn all the available features of the product, as well as information on its operation. The information that you get Emerson 142 will certainly help you make a decision on the purchase.
If you already are a holder of Emerson 142, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Emerson 142.
However, one of the most important roles played by the user manual is to help in solving problems with Emerson 142. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Emerson 142 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
