Emerson Process Management 402, 402VP User Manual

Instruction Manual 402 and 402VP

LIQ_MAN_ABR_402_402VP January 2014

NDURANCE

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™

Conductivity Sensors

CAUTION Sensor/Process Application Compatibility

The wetted sensor materials may not be compatible with process composition and operating conditions. Application compatibility is entirely the responsibility of the user.

CAUTION

The 402 and 402VP sensors are retractable. BEFORE RETRACTING THE SENSOR, be absolutely certain the process pressure

is less than 64 psig (542 kPa abs) and the process temperature is at a safe level!

Sensor Specifications

Specifications 402 402VP

Electrode -11, -12, -13 titanium -11, -12, -13 titanium

Insulator

Other Wetted Materials 316 SST, EPDM, graphite, Neoprene 316 SST, EPDM, graphite, Neoprene

Temperature Range 32–212 °F (0–100 °C) 32–212 °F (0–100 °C)

Maximum Pressure 200 psig (1481 kPa abs) 200 psig (1481 kPa abs)

Maximum Retraction Pressure 64 psig (542 kPa abs) 64 psig (542 kPa abs)

-11, -12, -13 PEEK (glass lled) -11, -12, -13 PEEK (glass lled)

Sensor Orientation

Figure 1. Sensor Orientation

trapped air

30° 30°

trapped sludge

Keep ¼ in. (6 mm) clearance between electrodes and piping. The electrolytes must be completely submerged in the process liquid, i.e., to the upper edge of the guard (item 10 in Figure 3).

Figure 2. Recommended Installation

flow

recommended

flow

recommended

not

402 and 402VP Instruction Manual

January 2014 LIQ_MAN_ABR_402_402VP

Installation and Retraction of Sensor

Installation

Retraction assembly kit (PN 23765-00) consists of items 1 through 7 shown in Figure 3 as well as a hex key and pipe tape.

The sensor assembly includes items 8 through 11.

IMPORTANT!

Do not remove or alter the guard (10) on the sensor tube (9).

Figure 3. 402 Sensor with Retraction Assembly Kit

Instruction Manual 402 and 402VP

LIQ_MAN_ABR_402_402VP January 2014

1. Make sure the system is shut down and there is no residual pressure.

2. Attach the ball valve (2) to the process piping using the 1–¼-inch FNPT port on the valve or the 1–¼ inch NPT nipple (1). Use pipe tape on male threads.

3. Slide the handle lock up on the ball valve handle and close the ball valve (2). If the process will be restarted before the sensor is installed, make sure the system pressure is at or below 542 kPa abs (64 psig) before proceeding. If the system

will not be restarted until after the sensor installation, leave the valve in the open position.

4. If the sensor includes a junction box (8), it must be removed from the sensor to install the retraction assembly kit.

Disconnect the sensor wires inside the junction box prior to disassembly.

5. Follow Figure 4 to assemble the sensor and retraction assembly. Keep items 3-7 in the proper sequence. Items 3, 6, and 7 are factory assembled.

6. Position the sensor tube (9) so that the electrodes (11) are completely withdrawn inside the packing adapter (3). If it is difcult to slide the sensor through the packing rings, loosen the packing bushing (6).

7. Position the clamp (4) on the sensor tube (9) so that the electrodes (11) will be completely immersed in the process liquid when the sensor is fully inserted through the ball valve. See Figure 3. Use the hex key to secure the clamp to the

sensor tube.

8. Slide the retainer (5) onto the sensor tube (9).

9. Screw the junction box (8) — hand tight — onto the sensor tube (9). DO NOT OVERTIGHTEN. Use 2-3 wraps of pipe tape

on the tube threads if a NEMA 4 seal is required at the junction box.

10. Apply pipe tape to the packing adapter (3) threads and screw the packing adapter onto the ball valve.

11. Check to ensure that the packing bushing (6) has been tightened. You should be able to push the sensor tube (9)

against the resistance provided by the packing rings (7).

12. Open the ball valve (2).

13. There may be some leakage around the packing bushing (6). Tighten the packing bushing to stop the leak. Use the

junction box (8) or sensor rear to push the sensor through the valve until the clamp (4) rests against the packing

bushing.

14. To secure the sensor tube (9) in place, tighten — hand tighten only — the retainer (5) against the back of the packing

adapter (3). If the sensor tube retracts when the system pressure is increased, reduce the pressure to 542 kPa abs (64 psig) or less, remove the retainer (5), and tighten the screw in the clamp (4).

Figure 4. 402 Sensor Installation

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