Instruction/ maintenance manual of the product 228 Emerson
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Model 228 Submersion/Inser tion T oroidal Sensor Instruction Sheet PN 51A-228/rev .P December 2010 SPECIFICA TIONS - SENSORS MODEL Wetted Materials T emperature Pressure CRN pressure* 228-02 PEEK (gla.
MODEL 228 INST ALLA TION INST ALLA TION Keep at least 1 in. (2.5 cm) between the sensor and pipe walls. If the clearance is too small, calibrate the sensor in place. Ensure that the sensor is completely submerged in liquid. Mounting the sensor in a vertical pipe run with the flow from bottom to top is best.
3 MODEL 228 WIRING FIGURE 6. Wiring 228-54 and 228-56 sensors to Model 54eC analyzer FIGURE 5. Wiring 228-54 and 228-56 sensors to Model 1056 and 56 analyzers.
MODEL 228 WIRING FIGURE 7. Wiring 228-54 and 228-56 sensors to Model Xmt-T p anel mount transmitter FIGURE 8. Wiring 228-54 and 228-56 sensors to Model Xmt-T pipe/wall mount transmitter 4.
5 MODEL 228 WIRING FIGURE 9. Wiring 228-54 and 228-56 sensors to Model 1066 transmitter FIGURE 10. Wiring 228-54 and 228-56 sensors to Model 5081-T transmitter RCV B RCV A RSHLD DRV B 228-54 RTN SENSE.
MODEL 228 WIRING FIGURE1 1. Wiring sensors through a remote junction box Wire sensors point to point. For wiring at the analyzer end, refer to the appropriate analyzer wiring diagram. For interconnecting cable 23294-00, use the 2265-54 wiring diagram.
7 MODEL 228 USE OF INSERTION - RETRACTION ASSEMBLIES INSERTION - RETRACTION ASSEMBLIES MANUAL RETRACTION ASSEMBL Y (PN 2331 1-01) INST ALLA TION 1. Loosen the collet nut and retract the sensor tube into the retraction chamber . See Figure 14. 2. Loosen the union nut and separate the retraction chamber from the assembly .
MODEL 228 USE OF INSERTION - RETRACTION ASSEMBLIES FIGURE 14. Manual Retraction Assembly MILLIMETER INCH RETRACTION 1. Make certain that the system pressure is less than 35 psig (342 kPa abs). Push in on the sensor using the top of the junction box. Slowly loosen the collet nut.
9 MODEL 228 USE OF INSERTION - RETRACTION ASSEMBLIES INST ALLA TION 1. Thread the sensor cable through the tube into the junction box. Screw the sensor into the tube. Hand tighten the sensor an additional half turn once the gas- ket is seated. See Figure 15.
MODEL 228 USE OF INSERTION - RETRACTION ASSEMBLIES 1. Retract the sensor into the retraction chamber and fully close the ball valve. 2. Drain the retraction chamber content s using the 1/8 in. flush ports. 3. (Mechanical) Mark the location of the nut housing cap and retraction collar on the sensor tube.
11 MODEL 228 USE OF INSERTION - RETRACTION ASSEMBLIES FIGURE 16. Mechanical Retraction Assembly Replacement Part s.
FIGURE 17. Manual Retraction Assembly Replacement Part s MODEL 228 USE OF INSERTION - RETRACTION ASSEMBLIES 12.
13 MODEL 228 CALIBRA TION CALIBRA TION The nominal cell constant of the Model 228 sensor is 2.7/cm. The error in the cell constant is about ± 10%, so con- ductivity readings made using the nominal cell constant will have an error of at least ± 10%. W all ef fects, discussed below , will likely make the error greater .
MAINTENANCE Generally , the only maintenance required is to keep the opening of the sensor clear of deposits. Cleaning frequency is best determined by experience. MODEL 228 MAINTENANCE W ARNING Retraction chamber contents may be under pressure. CAUTION Be sure sensor has been cleaned of process liquid before handling.
15 FIGURE 19. Resist ance check. Disconnect leads from analyzer before measuring resist ances. T ABLE 1. T emperature Resist ance 10 ° C 103.9 Ω 20 ° C 107.
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An important point after buying a device Emerson 228 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Emerson 228 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 228 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Emerson 228 you will learn all the available features of the product, as well as information on its operation. The information that you get Emerson 228 will certainly help you make a decision on the purchase.
If you already are a holder of Emerson 228, 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 228.
However, one of the most important roles played by the user manual is to help in solving problems with Emerson 228. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Emerson 228 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
