Emerson 141, 142 Installation 140 Sensor with Ball Valve KIT PN, Sensor Section on

MODEL 140,141, and 142 sensors INSTALLATION

INSTALLATION

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. Trapped bubbles will cause errors. As bubbles accumulate, the conduc- tivity reading drops. To control bubble formation, apply a small amount of back pressure to the drain.

°	°
FIGURE 1. Sensor Orientation

INSTALLATION – 140 SENSOR WITH BALL VALVE KIT (PN 23724-00)*

1.Install the sensor in either a 1-inch NPT weldalet or in a 1-inch pipe tee.

2.Remove the plastic shipping cap from the sensor.

3.Screw the 1-inch hex nipple into the weldalet or pipe tee. See Figure 2. Use pipe tape on the threads.

4.Position the sensor for easy access to the ball valve handle, sensor compression fitting nut, and junction box.

5.Make sure the ball valve is in the fully open position.

6.Finger tighten the sensor compression fitting nut. Do not over tighten because the next step is to press the sensor into the process pipe.

7.Insert the sensor tube until the sensor tip is no closer than 1 inch (25 mm) from the far wall of the process pipe. See Figure 2.

8.Tighten the sensor compression fitting nut to hold the sensor tip in position. See Figure 2 for instructions.

*If the ball valve assembly is already in place and the process line is pressurized, refer to Inserting the 140

Sensor Section on page 6.

SENSOR COMPRESSION

FITTING

PROCESS PIPING

BALL VALVE

SENSOR

A

DWG. NO.	REV.
40014008	E

WRENCH “A”

Hold body with wrench B and turn WRENCH A 1 1/4 turns beyond fin- ger tight.

1-in. NPT HEX NIPPLE

WELDALET

	CAUTION	PUT WRENCH “A” HERE AND
Process O-Ring		TURN
must be in place
and is critical.
		PUT WRENCH “B” HERE
Replace if worn
or dirty.
		Tighten finger tight before
	BALL VALVE
		inserting sensor

TOP VIEW

SIDE VIEW

WRENCH “B”

FIGURE 2. Installing model 140 sensor with ball valve kit (PN 23724-00).

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