Emerson 140, 141, 142 User Manual

Instruction Sheet

PN 51A-140/rev.E

December 2010

Models 140, 141, and 142

Conductivity Sensors

For additional information, please visit our website at www.emersonprocess.com/raihome/liquid/.

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

BEFORE REMOVING THE SENSOR, be absolutely certain the process pressure is reduced to 0 psig and the process temperature is at a safe level!

SENSOR SPECIFICATIONS

SPECIFICATIONS	MODEL 140	MODEL 141	MODEL 142
			316SS, Viton1 PEEK (high
Wetted Materials	316SS, PEEK, Viton1	316SS, PEEK, Viton1	temp options), Kel-F2 (stand
			temp options)
Temperature (standard)	302ºF (150ºC) max	see graph	see graph
Temperature (high temp)	392ºF (200ºC) max	see graph	see graph
Maximum Pressure	100 psig (791 kPa abs)	see graph	see graph

INSTALLATION HARDWARE FOR 140 SENSOR

SPECIFICATION	Ball valve kit (PN 23724-00)	Fitting kit (PN 23730-00)
Wetted Materials	316SS	316SS, PEEK

Viton1 is a registered trademark of DuPont Performance Elastomers.

Kel-F2 is a registered trademark of 3M

MODEL 140,141, and 142 sensors

INSTALLATION

INSTALLATION

Keep 1/4 inch (6 mm) clearance between electrodes and piping. The electrodes must be completely submerged 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 conductivity 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
		SENSOR

BALL VALVE

A

DWG. NO.	REV.
40014008	E

WRENCH “A”

Hold body with wrench B and turn WRENCH A 1 1/4 turns beyond finger 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

SIDE VIEW

WRENCH “B”

TOP VIEW

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

2

MODEL 140,141, and 142 sensors

INSTALLATION

INSTALLATION – 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.

3.Screw the sensor into the fitting. Use pipe tape on the threads. See Figure 3.

	DWG. NO.	REV.
	40014204	B

FIGURE 3. Installing model 141 sensor

INSTALLATION – 142 SENSOR

1.Install the sensor in a 3/4-inch NPT weldalet or in a 1-inch pipe tee. See Figure 4.

2.Remove the plastic shipping cap from the sensor.

3.Screw the sensor into the fitting. Use pipe tape on the threads. DO NOT tighten the sensor compression fitting until the sensor is correctly positioned.

4.If necessary, loosen the sensor compression fitting and position the sensor so that the tip of the sensor is at least 1-inch (25 mm) from the far wall of the pipe.

5.Tighten the compression fitting using the procedure shown in Figure 2.

	DWG. NO.	REV.
	40014204	B

FIGURE 4. Installing model 142 sensor

3

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.

CABLE
										MODEL
				9
				8					140
				7
										SERIES
				6
				5
	GRAY			4		GRAY
				3
				2
				1

Figure 5. Sensor junction box wiring. Terminals in the junction box are not numbered.

141 and 142 sensors have one gray wire (shown). The 140 sensor has two gray wires attached to the terminal.

WIRE COLOR AND CONNECTIONS IN SENSOR

COLOR	FUNCTION
Gray	Connects to outer electrode
Clear	Coaxial shield for gray wire
Orange	Connects to inner electrode
Clear	Coaxial shield for orange wire
Red							RTD in
White with red stripe	RTD						RTD sense
White							RTD return
Clear	Shield for all RTD lead wires

WIRING DIAGRAMS

FIGURE 6. Model 54eC Wiring

FIGURE 7. Model 1056 and 56 Wiring

4