Emerson Rosemount 402 Quick Start Manual
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Emerson Rosemount 402 Quick Start Manual

Contacting conductivity sensors
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Quick Start Guide
00825-0100-3402, Rev AB
October 2023
Rosemount 402 and 402VP
Contacting Conductivity Sensors

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Summary of Contents for Emerson Rosemount 402

  • Page 1 Quick Start Guide 00825-0100-3402, Rev AB October 2023 Rosemount 402 and 402VP Contacting Conductivity Sensors...
  • Page 2 Read all instructions prior to installing, operating, and servicing the product. If you do not understand any of the instructions, contact your Emerson representative for clarification. Follow all warnings, cautions, and instructions marked on and supplied with the product.
  • Page 3 October 2023 Quick Start Guide NOTICE The Rosemount 402 and 402VP sensors are retractable Before retracting the sensor, be absolutely certain that the process pressure is less than 64 psi (5.4 bar) and the process temperature is at a safe level! NOTICE The information contained in this document is subject to change without notice.
  • Page 4 Quick Start Guide October 2023 Emerson.com...

  • Page 5: Installation

    October 2023 Quick Start Guide 1  Installation 1.1  Unpack and inspect Procedure 1. Inspect the outside of the carton for any damage. If you detect damage, contact the carrier immediately. 2. Inspect the instrument and hardware. Make sure all items on the packing list are present and in good condition.
  • Page 6 Do not exceed temperature and operating pressure specifications. See instructions for retraction procedures.  WARNING For all installations: Place the label on the sensor tube near the cable or junction box. Warning side must face the cable or junction box end of the sensor. Emerson.com...
  • Page 7 October 2023 Quick Start Guide 1.3.1  Install sensor Retraction assembly kit (PN 23765-00) consists of the items shown in Figure 1-3 as well as a hex key and pipe tape. Figure 1-3: Sensor with retraction assembly kit A. Junction box B. Clamp (PN 33579-00) C.
  • Page 8 Figure 1-3. 7. Use the hex key to secure the clamp to the sensor tube. 8. Slide the retainer onto the sensor tube. 9. Screw the junction box hand-tight onto the sensor tube. Emerson.com...
  • Page 9 October 2023 Quick Start Guide NOTICE Do not over tighten. 10. Use two to three wraps of pipe tape on the tube threads if a NEMA 4 seal is required at the junction box. ® 11. Apply pipe tape to the packing adapter threads and screw the packing adapter onto the ball valve.
  • Page 10 Quick Start Guide October 2023 Figure 1-5: Rosemount 402 Contacting Conductivity Sensor in retracted position A. Junction box B. Retainer (PN 33577-00) C. Clamp (PN 33579-00) D. Guard E. Sensing element F. Handle lock G. Nipple (PN 43242M) H. Ball valve (PN 9340078) I.
  • Page 11 October 2023 Quick Start Guide The electrodes are now inside the packing adapter. See Figure 1-5. 5. Slide the handle lock up on the valve handle and close the ball valve (H). NOTICE Failure to withdraw the sensor completely may cause damage to the electrodes when the valve is closed.

  • Page 12: Wiring

    Coaxial shield for gray wire Orange Connects to inner electrode Clear Coaxial shield for orange wire White with red stripe White A. RTD B. RTD in C. RTD sense D. RTD return Clear Shield for all RTD lead wires Emerson.com...
  • Page 13 October 2023 Quick Start Guide Figure 2-1: Wiring for integral junction box Terminals in junction box are not wired. Table 2-2: Wiring for integral junction box Terminal number Letter Wire color Clear Clear Gray C and F White and white/red Orange Clear Quick Start Guide...
  • Page 14 Wire color Description number White RTD return White/red RTD sense RTD in Clear RTD shield 4 count B 4 count A Clear Shield, 2 count Orange Sensor, 2 count B Clear Shield, 2 count Gray Sensor, 2 count A Emerson.com...
  • Page 15 October 2023 Quick Start Guide Figure 2-3: Wiring for Rosemount 1066 Transmitter Table 2-4: TB2 Letter Wire color Description White Return White/red Sense RTD in Clear Shield Table 2-5: TB1 Letter Wire color Description Receive B Receive A Clear Receive shield Gray Drive B Orange...
  • Page 16 Table 2-6: Wiring for Rosemount 5081 Transmitter Terminal Letter Wire color Description number Reserved Clear RTD shield White RTD common White/red RTD sense RTD in Receive shield Clear Receive common Orange Receive Drive shield Clear Drive common Gray Drive Emerson.com...
  • Page 17 October 2023 Quick Start Guide (continued) Table 2-6: Wiring for Rosemount 5081 Transmitter Terminal Letter Wire color Description number HART ® ™ OUNDATION Fieldbus (-) HART/F Fieldbus OUNDATION Figure 2-5: Wiring through a junction box If you make wiring connections through a remote junction box (PN 23550-00), wire point-to-point.

  • Page 18: Calibration And Maintainenance

    3.2  Calibrate the sensor Emerson calibrates Rosemount 402 sensors at the factory, so you do not need to calibrate them when first placing them into service. Simply enter the cell constant printed on the label into the transmitter.

  • Page 19: Troubleshooting

    October 2023 Quick Start Guide 4  Troubleshooting Note For any repair or warranty inquiries, please contact our Customer Care group. 4.1  Off-scale reading Potential cause Wiring is incorrect. Recommended action Verify and correct wiring. Potential cause Temperature element is open or shorted. Recommended action Check temperature element for open or short circuits.
  • Page 20 Sensor is not in process stream. Recommended action Submerge sensor completely in process stream. Potential cause Sensor has failed. Recommended action Perform isolation checks. Figure 4-2. Figure 4-2: Checking the continuity and leakage A. Orange B. Inner C. Outer D. Gray Emerson.com...
  • Page 21 October 2023 Quick Start Guide 4.2  Noisy reading Potential cause Sensor is improperly installed in process stream. Recommended action Submerge sensor completely in process stream. Potential cause Variopol cable is not properly seated. Recommended action Loosen connector and reseat. 4.3  Reading seems wrong (lower or higher than expected) Potential cause Bubbles trapped in sensor.
  • Page 22 111.7 1117 115.5 1155 119.4 1194 Figure 4-1. 4.6  Check the continuity and leakage Procedure Disconnect electrode leads and measure resistance and continuity as shown in Figure 4-2. The sensor must be dry when checking resistance between electrode leads. Emerson.com...
  • Page 23 October 2023 Quick Start Guide Quick Start Guide...
  • Page 24 2023 Emerson. All rights reserved. Emerson Terms and Conditions of Sale are available upon request. The Emerson logo is a trademark and service mark of Emerson Electric Co. Rosemount is a mark of one of the Emerson family of companies. All other marks are the property of their respective owners.

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Rosemount 402vp

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