Rosemount 401 Endurance Conductivity Sensor Abridged Manuals & Guides

Model 401

ENDURANCE™Conductivity Sensor

Instruction Sheet

PN 51A-401/rev.J
January 2011

INSTALLATION

See Figures 1 and 2 for recommended sensor orientation and
installation. The sensor must be completely sumberged in the
process liquid. Keep 1/4 in. (0.6 cm) clearance between elec­trodes and piping.

If the sensor is installed in a sidestream with the sample draining
to open atmosphere, bubbles may accumulate on the electrodes.
Trapped bubbles will cause errors. Normally, as bubbles accu­mulate the conductivity reading drifts down. To control bubble
formation, apply a small amount of back pressure to the sensor.

q

q

FIGURE 1. Sensor Orientation FIGURE 2. Sensor Installation

SENSOR SPECIFICATIONS

SPECIFICATIONS

MODEL 401

Wetted Materials graphite, Kynar, epoxy, EPDM

Temperature Range 32-212°F (0-100°C)

Maximum Pressure 200 psig (1481 kPa abs)

For additional information, please visit our website

at www.emersonprocess.com/raihome/liquid/.

The wetted sensor materials may not be compatible
with process com position and operating conditions.
Application compat ibility is entirely the

responsi-

bility of the user.

CAUTION

SENSOR/PROCESS APPLICATION COMPATIBILITY

WARNING

Before removing the sensor, be absolutely certain
that the process pressure is reduced to 0 psig and
the process temperature is lowered to a safe level!

WARNING

trapped air

30q

trapped sludge

30

flow

flow

flow

recommended

not

recommended

flow

MODEL 401 WIRING

2

WIRING DIAGRAMS

WIRING

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

RTD

RTD in

RTD sense

RTD return

FIGURE 3. Model 54eC Wiring

FIGURE 4. Model 56 and 1056 Wiring

FIGURE 5. Model Xmt-C-10 Wiring (Panel)

FIGURE 6. Model Xmt-C-11 Wiring (Pipe or Wall)

3

MODEL 401 WIRING

RCV B

RCV A

RSHLD

DRVB

RTN

SENSE

RTD IN

SHLD

CLEAR

WHITE/RED

RED

DRVA

DSHLD

WHITE

CLEAR

GRAY

ORANGE

CLEAR

TB1TB2

WIRING THROUGH A JUNCTION BOX

If wiring connections are made through a remote junction box (PN 23550-00), wire point-to-point. Use cable 23747-00
(factory-terminated) or 9200275 (no terminations).

FIGURE 8. Model 5081C Wiring

FIGURE 7. Model 1066 Wiring

CLEANING THE SENSOR

Use a warm detergent solution and a soft brush or pipe cleaner to remove oil and scale. Isopropyl alcohol (rubbing alco­hol) can also be used to remove oily films. Avoid using strong mineral acids to clean conductivity sensors.

CALIBRATION

ENDURANCE conductivity sensors are calibrated at the factory and do not need calibration when first placed in service.
Simply enter the cell constant printed on the label into the analyzer.

After a period of service, the sensor may require calibration. The sensor can be calibrated against a solution having
known conductivity or against a referee meter and sensor. If using a standard solution, choose one having conductivity
of about 5000 uS/cm.

For more information about calibrating contacting conductivity sensors, refer to application sheet ADS 43-024, available on
the Rosemount Analytical website.

Credit Cards for U.S. Purchases Only.

The right people,
the right answers,
right now.

ON-LINE ORDERING NOW AVAILABLE ON OUR WEB SITE

http://www.raihome.com

Specifications subject to change without notice.

Emerson Process Management

2400 Barranca Parkway
Irvine, CA 92606 USA
Tel: [phone]
Fax: [phone]

http://www.raihome.com

© Rosemount Analytical Inc. 2011

MODEL 401 TROUBLESHOOTING

TROUBLESHOOTING

PROBLEM PROBABLE CAUSE SOLUTION

Off-scale reading Wiring is wrong. Verify wiring.

Temperature element is open or shorted. Check temperature element for open or

short circuits. See Figure 9.

Sensor is not in process stream. Be sure sensor is completely submerged in

process stream.

Sensor has failed. Call the factory.

Noisy reading Sensor is improperly installed in process Be sure sensor is completely submerged

stream. in process stream.

Reading seems wrong (lower Bubbles trapped in sensor. Be sure sensor is properly oriented in
or higher than expected) pipe or flow cell. See Figures 1 & 2

Apply back pressure to flow cell.

Wrong temperature correction algorithm. Check that temperature correction is

appropriate for the sample. See analyzer
manual for more information.

Wrong cell constant Verify that the correct cell constant has been

entered inthe analyzer and that the cell
constant is appropriate for the conductivity
of the sample. See analyzer manual.

Sluggish response Electrodes are fouled Clean electrodes

Sensor is installed in dead area in piping Move sensor to a location more

representative of the process liquid.

4

FIGURE 9. Checking Temperature Element

Disconnect leads and measure resistances shown. The measured resistance
at room temperature should be close to the value in the table.

q

temperature

C

0 100.0 1000
10 103.9 1039
20 107.8 1078
30 111.7 1117
40 115.5 1155
50 119.4 1194

RTD

red

red/white

white

R

8

resistance in :

Pt 100 Pt 1000