Emerson 140, 141, 142 User Manual
Models 140, 141, and 142
Conductivity Sensors
Instruction Sheet
PN 51A-140/rev.E
December 2010
SENSOR SPECIFICATIONS
For additional information, please visit our website
at www.emersonprocess.com/raihome/liquid/.
CAUTION
CAUTION
SPECIFICATIONS
MODEL 140 MODEL 141 MODEL 142
Wetted Materials
316SS, PEEK, Viton
1
316SS, PEEK, Viton
1
316SS, Viton1 PEEK (high
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-F2is a registered trademark of 3M
SENSOR/PROCESS
APPLICATION COMPATIBILITY
The wetted sensor materials may not be compatible
with process com position and operating conditions.
Application compat ibility is entirely the responsibility
of the user.
BEFORE REMOVING THE SENSOR, be
absolutely certain the process pressure is
reduced to 0 psig and the process temperature is at a safe level!
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.
MODEL 140,141, and 142 sensors INSTALLATION
INSTALLATION
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.
A
PROCESS PIPING
PUT WRENCH “A” HERE AND
TURN
WRENCH “A”
WRENCH “B”
BALL VALVE
SENSOR COMPRESSION
FITTING
SENSOR
PUT WRENCH “B” HERE
SIDE VIEW
TOP VIEW
CAUTION
Process O-Ring
must be in place
and is critical.
Replace if worn
or dirty.
Tighten finger tight before
inserting sensor
Hold body with wrench
B and turn WRENCH A
1 1/4 turns beyond finger tight.
WELDALET
1-in. NPT HEX NIPPLE
BALL VALVE
DWG. NO. REV.
40014008 E
FIGURE 2. Installing model 140 sensor with ball valve kit (PN 23724-00).
FIGURE 1. Sensor Orientation
2
°
°
3
MODEL 140,141, and 142 sensors INSTALLATION
FIGURE 3. Installing model 141 sensor
DWG. NO. REV.
40014204 B
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.
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
RTD
RTD in
RTD sense
RTD return
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.
Figure 5. Sensor junction box wiring. Terminals in the
junction box are not numbered.
GRAY
GRAY
MODEL 140 SERIES
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
White with red stripe
White
Clear Shield for all RTD lead wires
CABLE
9
8
7
6
5
4
3
2
1
FIGURE 6. Model 54eC Wiring
FIGURE 7. Model 1056 and 56 Wiring
WIRING DIAGRAMS
4
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