Rosemount Analytical 410VP Operating Manual

Instruction Manual

IQ-MAN-410VP

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Rev. E

May 2017

Rosemount

™

410VP

Four-Electrode Conductivity Sensor

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Essential Instructions

Read this page before proceeding!

Emerson designs, manufactures and tests its products to meet many national and international stan-

dards. Because these sensors are sophisticated technical products, you MUST properly install, use,

nd maintain them to ensure they continue to operate within their normal specifications. The

a
following instructions MUST be adhered to and integrated into your safety program when installing,
using, and maintaining Rosemount products. Failure to follow the proper instructions may cause
any one of the following situations to occur: loss of life; personal injury; property damage; damage
to this sensor; and warranty invalidation.

• Read all instructions prior to installing, operating, and servicing the product.

• If you do not understand any of the instructions, contact your Emerson representative for
clarification.

• Follow all warnings, cautions, and instructions marked on and supplied with the product.

• Inform and educate your personnel in the proper installation, operation, and maintenance
of the product.

• Install your equipment as specified in the Installation Instructions of the appropriate
Instruction Manual and per applicable local and national codes. Connect all products to
the proper electrical and pressure sources.

• To ensure proper performance, use qualified personnel to install, operate, update,
program, and maintain the product.

• When replacement parts are required, ensure that qualified people use replacement parts
specified by Emerson. Unauthorized parts and procedures can affect the product's
performance, place the safe operation of your process at risk, and VOID YOUR WARRANTY.
Third-party substitutions may result in fire, electrical hazards, or improper operation.

• Ensure that all equipment doors are closed and protective covers are in place, except when
maintenance is being performed by qualified persons, to prevent electrical shock and
personal injury.

The information contained in this document is subject to change without notice.

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 that the process pressure is reduced to 0 psig and
the process temperature is lowered to a safe level!

About This Document

his manual contains instructions for installation and operation of the Rosemount 410VP

T
Four-Electrode Conductivity Sensor

The following list provides concerning all revisions of this document.

Rev. Level Date Notes

E 05/17 Reformatted to reflect the latest Emerson documentation style

Specifications and Wiring Diagrams.

Instruction Manual Table of Contents

LIQ-MAN-410VP May 2017

Contents

Section 1: Specifications

1.1 Specifications ......................................................................................................1

Section 2: Installation

2.1 Unpacking and Inspection ...................................................................................3

2.2 Installation...........................................................................................................3

Section 3: Wiring

3.1 Wiring for Rosemount 410VP...............................................................................5

Section 4: Setup and Calibration

4.1 Calibrating the sensor..........................................................................................7

Section 5: Troubleshooting

5.1 Troubleshooting ................................................................................................11

Section 6: Accessories

6.1 Accessories........................................................................................................13

Table of Contents i

Table of Contents Instruction Manual

May 2017 LIQ-MAN-410VP

ii Table of Contents

Instruction Manual Specifications

LIQ-MAN-410VP May 2017

Section 1: Specifications

1.1 Specifications

Table 1-1: Rosemount 410VP sensor specifications

Wetted Materials

Electrodes 316L stainless steel

Sensor body unfilled PEEK; compliant with 21CFR177.2415

O-ring (option -22 only) EP; compliant with 21CFR177.2600

Conformance to 3-A Sanitary Standards

Sensors with option -20 and -21 meet 3-A sanitary standards for sensors and sensor fittings and connections used on milk and
milk products equipment (74-06)

Surface Finish

All wetted surfaces except electrodes have 16 micro in. (0.4 micrometer) Ra surface finish.

Cable

VP8 connector cable (sold separately)

Maximum Cable Length

100 ft (30.5 m)

Range

1 µS/cm to 1400 mS/cm

Accuracy

Within ±4% of the expected conductivity

Steam Sterilization

Tolerates SIP to 284 °F (140 °C)

Weight/Shipping Weight

1lb (0.5kg) / 1lb (0.5kg) Weight and shipping weight are rounded up to the nearest 1lb or 0.5kg.

Specifications 1

Specifications Instruction Manual

May 2017 LIQ-MAN-410VP

Figure 1-1: Temperature and pressure

2 Specifications

Instruction Manual Installation

LIQ-MAN-410VP May 2017

Section 2: Installation

2.1 Unpacking and Inspection

Inspect the outside of the carton for any damage. If damage is detected, contact the carrier
immediately. Inspect the instrument and hardware. Make sure all items in the packing list are
present and in good condition. Notify the factory if any part is missing.

2.2 Installation

The Rosemount 410VP sensor is available with four process connections: 1½ in. Tri-Clamp1, 2-in.
Tri-Clamp, G 1¼, and Varivent N2. Gaskets and clamps for the Tri-Clamp and Varivent connections
must be supplied by the user.

1. Install the sensor so that the electrodes are completely immersed in the process liquid.

2. Avoid installing the sensor in places where air bubbles are likely to get trapped or sediment
is likely to accumulate on the electrodes.

3. Generally, mounting the sensor in a vertical pipe run is best. If the sensor must be installed
in a horizontal pipe, place the sensor in the 3 o’clock position.

4. Keep at least 1.0 in. (25 mm) clearance between the end of the sensor and the opposite
pipe wall.

5. To keep response time as fast as possible, do not install the sensor in dead legs or areas
where circulation is poor.

Installation 3

Installation Instruction Manual

May 2017 LIQ-MAN-410VP

4 Installation

Instruction Manual Wiring

LIQ-MAN-410VP May 2017

Section 3: Wiring

3.1 Wiring for Rosemount 410VP

For other wiring diagrams not shown below, please refer to the Liquid Transmitter Wiring Diagrams.

Figure 3-1: Wire color and functions

Note: Current is injected through the gray and orange wires. Voltage is measured across the white and
black wires.

Figure 3-2: Rosemount 410VP Sensor Wiring to Rosemount 1056, 56, and 1057 Transmitters

Wiring 5

Wiring Instruction Manual

May 2017 LIQ-MAN-410VP

Figure 3-3: Rosemount 410VP Sensor Wiring to Rosemount 1066 Transmitter

Note: The terminal end of the sensor is keyed to ensure proper mating with the cable receptacle. Once the key

has slid into the mating slot, tighten the connection by turning the knurled ring clockwise.

6 Wiring

Instruction Manual Setup and Calibration

LIQ-MAN-410VP May 2017

Section 4: Setup and Calibration

4.1 Calibrating the sensor

he sensor is calibrated at the factory and does not require initial user-calibration. Simply configure

T
the transmitter to accept a four-electrode sensor and enter the cell constant and calibration factor
printed on the label. 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 greater than 500 µS/cm. Do not use
standard solutions having conductivity less than 100 µS/cm. They are susceptible to contamina
tion by atmospheric carbon dioxide, which can alter the conductivity by a variable amount as great
as 1.2 µS/cm (at 25 °C). Calibration changes the cell constant only, not the calibration factor. If you
wish to change the calibration factor, consult the factory. For more information about calibrating
contacting conductivity sensors refer to

4.1.1 Calibrating using a standard solution

If using a standard solution, choose one having conductivity in the recommended operating range
for the sensor cell constant.

Application Data Sheet.

1. Immerse the rinsed sensor in the standard solution and adjust the transmitter reading to
match the conductivity of the standard.

2. For an accurate calibration:

a. Choose a calibration standard near the midpoint of the recommended conductivity

range for the sensor.

b. Do not use calibration standards having conductivity less than 100 µS/cm.

c. Turn off automatic temperature compensation in the transmitter.

d. Use a standard for which the conductivity as a function of temperature is known.

e. Use a good quality calibrated thermometer with an error rate less than ±0.1 °C to

measure the temperature of the standard.

f. Follow good laboratory practice. Rinse the beaker and sensor at least twice with

standard. Be sure the rinse solution reaches between the inner and outer electrodes by
tapping and swirling the sensor while it is immersed in the standard.

g. Be sure air bubbles are not trapped between the electrodes. Place the sensor in the

standard and tap and swirl to release bubbles. Note the reading and repeat. If readings
agree, no trapped bubbles are present. Repeat until two subsequent readings agree.

Setup and Calibration 7

Setup and Calibration Instruction Manual

May 2017 LIQ-MAN-410VP

4.1.2 Calibrating using a reference meter and sensor

. Connect the process sensors and reference sensor in series and allow the process liquid

1

to flow through all sensors.

2. Calibrate the process sensor by adjusting the process transmitter reading to match the
conductivity measured by the reference meter. See

Figure 4-1 In process calibration setup

Figure 4-1 for the calibration setup.

NOTICE

The above figure shows two process sensors connected in series with a reference sensor. The horizontal
sensor orientation ensures good circulation of the process liquid past the electrodes. The staircase
orientatation provides an escape path for bubbles.

3. The method is ideal for calibrating the sensors used in low conductivity water (0.01/cm
cell constants) because the calibration system is closed and cannot be contaminated by
atmospheric carbon dioxide.

Following precautions are necessary for successful calibration:

1. If the normal conductivity of the process liquid is less than about 1.0 µS/cm, adjust the
conductivity so that it is near the upper end of the operating range.

The difference between the conductivity measured by the process and reference meter
usually has both a fixed (constant error) and relative (proportional error) component.
Because the cell constant calibration assumes the error is proportional only, calibration at
low conductivity allows the fixed component to have an outsized influence on the result.

For example, assume the only difference between reference meter and process sensor is
fixed and the process sensor always reads 0.002 µS/cm high. If the process sensor is
calibrated at 0.100 µS/cm, the new cell constant will be changed by 0.100/0.102 or 2%. If
the sensor is calibrated at 0.500 µS/cm, the change will be only 0.500/0.502 or 0.4%.

Calibration at higher conductivity produces a better result because it minimizes the effect
of the offset.

8 Setup and Calibration

Instruction Manual Setup and Calibration

LIQ-MAN-410VP May 2017

2. Orient the sensors so that air bubbles always have an easy escape path and cannot get
trapped between the electrodes.

3. Turn off automatic temperature compensation in the transmitter.

Almost all process conductivity transmitter feature automatic temperature compensation
in which the transmitter applies one of several temperature correction algorithms to
convert the measured conductivity to the value at a reference temperature, typically 25 °C.

Although temperature correction algorithms are useful for routine measurements, they
should not be used during calibration.

There are two following reasons:

a. No temperature correction is perfect. If the assumptions behind the algorithm do not

perfectly fit the solution being measured, the temperature-corrected conductivity will
be in error.

b. If the temperature measurement itself is in error, the corrected conductivity will be in

error.

The purpose of calibrating the sensor is to determine the cell constant. To minimize the
error in the cell constant, all sources of avoidable error, e.g., temperature compensation
should be eliminated.

4. Keep tubing runs between the sensors short and adjust the sample flow as high as possible.
Short tubing runs and high flow ensure the temperature of the liquid does not change as
it flows from one sensor to another.

If the process temperature is appreciably different from ambient, high flow may not be
enough to keep the temperature constant. In this case, pumping sample at room
temperature from a reservoir through the sensors might be necessary. Because such a
system is likely to be open to atmosphere, saturate the liquid with air to prevent drift
caused by absorption of atmospheric carbon dioxide.

5. To prevent contamination of low conductivity (<1 µS/cm) process liquids, use clean tubing
to connect the sensors. To prevent drift caused desorption of ionic contaminants from
tube walls, keep the sample flow greater than 6 ft/sec (1.8 m/sec).

4.1.3 Calibrating using a grab sample

1. Use the grab sample method when it is impractical to remove the sensor for calibration or
to connect a reference sensor to the process line.

2. Take a sample of the process liquid, measuring its conductivity using a reference
instrument, and adjusting the reading from the process transmitter to match the measured
conductivity.

3. Take the sample from a point as close to the process sensor as possible.

4. Keep temperature compensation turned on. There is likely to be a lag time between
sampling and analysis, so temperature is likely to change.

5. Be sure the reference and process instruments are using the same temperature correction
algorithm.

Setup and Calibration 9

Setup and Calibration Instruction Manual

May 2017 LIQ-MAN-410VP

. Grab sample calibration should be used only when the conductivity is fairly high.

6

a. The temperature compensation algorithm will most likely be linear slope.

b. Confirm that both instruments are using the same temperature coefficient in the linear

slope calculation.

c. If the reference meter does not have automatic temperature correction, calculate

the conductivity at 25 °C using the equation:

Where: C25 = the conductivity at 25 °C

Ct = the conductivity at t °C

α = the temperature co-efficient expressed as a decimal fraction.

d. Confirm the temperature measurements in both the process and reference instruments

are accurate, ideally to within ±0.5 °C.

e. Follow good laboratory practice when measuring the conductivity of the grab sample.

- Rinse the beaker and sensor at least twice with sample. Be sure the rinse solution
reaches between the inner and outer electrodes by tapping and swirling the
sensor while it is immersed in the sample.

- Be sure air bubbles are not trapped in the sensor. Place the sensor in the sample
and tap and swirl to release bubbles. Note the reading. Then, remove the sensor
and return it to the sample. Tap and swirl again and note the reading. If the two
readings agree, trapped bubbles are absent. If they do not agree, bubbles are
present . Continue the process until two subsequent readings agree.

- While making the measurement, do not allow the sensor to touch the sides and,
particularly, the bottom of the beaker. Keep at least 1/4 in. (6 mm) clearance.

f. Be sure to compensate for process conductivity changes that might have occurred

while the grab sample was being tested. Rosemount conductivity transmitters
(Rosemount transmitter models 1056, 1066, and 56) do this automatically. They save
the value of the process conductivity at the time the sample was taken and use that
value to calculate the new cell constant when the user enters the result of the grab
sample test. Older transmitters do not remember the process conductivity value.

Therefore, the user must enter a value adjusted by an amount proportional to the change

in the process conductivity. For example, suppose the process conductivity is 810 µS/cm

when the sample is taken and 815 µS/cm when the test result is entered. If the grab

sample conductivity is 819 µS/cm, the user should enter (815/810) × 819 or 824 µS/cm.

10 Setup and Calibration

Instruction Manual Troubleshooting

LIQ-MAN-410VP May 2017

Section 5: Troubleshooting

5.1 Troubleshooting

Table 5-1: Troubleshooting

Trouble Probable Cause Remedy

Off-scale reading

Noisy reading

iring is incorrect.

W

RTD is open or shorted. Check RTD for open connections or shorts.

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

Variopol cable is not properly seated. Loosen connector and reseat.

Sensor is improperly installed in process
stream.

Variopol cable is not properly seated. Loosen connector and reseat.

erify wiring.

V

See Figure 3-1.

process stream.

Be sure sensor is completely submerged in
process stream.

Bubbles trapped on sensor. Be sure sensor is installed so that air cannot

become trapped against it.

Wrong temperature correction algorithm. Check that temperature correction algorithm

is appropriate for the sample. See the
transmitter manual for more information.

Wrong cell constant. Wrong calibration factor. Verify that the correct cell constant and

calibration factor have been entered in the

Reading seems wrong (lower
or higher than expected)

Bottom of sensor is too close to pipe wall. Maintain at least 1.0 in (25 mm) clearance

Temperature reading in error Disconnect red and white RTD wires. Measure

Sluggish response Electrodes are fouled. Clean electrodes.

Sensor is installed in dead area in process
piping

transmitter. See the transmitter manual for
more information.

between bottom of sensor and opposite pipe
wall.

resistance across leads, which should be about
1100 Ω at room temperature.

Move sensor to a location more representative
of the process liquid.

Note: For any repair or warranty inquiries please contact our Customer Care group.

Troubleshooting 11

Troubleshooting Instruction Manual

May 2017 LIQ-MAN-410VP

12 Troubleshooting

Instruction Manual Accessories

LIQ-MAN-410VP May 2017

Section 6: Accessories

6.1 Accessories

Table 6-1: Accessories for Rosemount 410VP Sensor

Part Number Description

24287-00 10 ft VP8 connector cable for Rosemount 410VP sensor

4287-01

2

23550-00 Remote junction box, without preamplifier

24289-00 Interconnect cable for Rosemount 410VP sensor, prepped

9200334 Interconnect cable for Rosemount 410VP sensor, unprepped

9210004 Conductivity standard, 2000 μS/cm, 16 oz

0 ft VP8 connector cable for Rosemount 410VP sensor

5

Accessories 13

LIQ-MAN-410VP

Rev. E

May 2017

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