Emerson Rosemount 226 Bedienungsanleitung

Reference Manual

00809-0100-3226, Rev AA

August 2018

Rosemount™ 226

Toroidal Conductivity Sensors

Safety Information

WARNING

HIGH PRESSURE AND TEMPERATURE HAZARD

Before removing the senosr, reduce the process pressure to 0 psig and cool down the process temperature.

Failure to reduce the pressure and temperature may cause serious injury to personnel.

CAUTION

EQUIPMENT DAMAGE

The wetted sensor materials may not be compatible with process composition and operating conditions. Application

compatibility is entirely your responsibility.

Contents

Chapter 1 Description and specifications ...................................................................................... 7

1.1 Overview ......................................................................................................................................... 7

1.2 Specifications .................................................................................................................................. 7

1.3 Unpacking and inspection ............................................................................................................... 7

1.4 Ordering information ...................................................................................................................... 8

Chapter 2 Install ........................................................................................................................... 9

2.1 Installing the Sensor ........................................................................................................................ 9

2.2 Wiring the Sensor .......................................................................................................................... 12

Chapter 3 Calibration .................................................................................................................. 17

3.1 Sensor Calibration ......................................................................................................................... 17

3.2 Calibrating against a Standard Solution ......................................................................................... 17

3.3 Calibrating against a Referee – In Process ...................................................................................... 19

3.4 Calibrating against a Referee - Grab Sample .................................................................................. 21

Chapter 4 Troubleshooting ......................................................................................................... 23

4.1 Maintaining the sensor .................................................................................................................. 23

4.2 Troubleshooting ........................................................................................................................... 23

Chapter 5 Accessories ................................................................................................................. 27

Reference Manual Contents

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Contents Reference Manual

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6 Reference Manual

1 Description and specifications

1.1 Overview

The Rosemount 226 sensor is a toroidal (inductive) conductivity sensor. These sensors

work well for measuring in highly conductive liquids up to 2 S/cm (2,000,000 μS/cm).

Unlike metal electrode based conductivity sensors, toroidal conductivity sensors, like the

Rosemount 226, are resistant to fouling, coating, and chemical attack.

Sensors are molded with highly corrosion-resistant glass-filled PEEK

(polyetheretherketone). The sensors include an integral Pt-100 RTD for temperature

compensation. With a large bore hole opening, the Rosemount 226 greatly resists

plugging when used in liquids containing high amounts of suspended solids. PEEK is not

recommended for greater than 50% concentrations (at 77 °F (25 °C) ) of H2SO4, HNO3,

and H3PO4. PEEK is not recommended for use with HF at all.

1.2 Specifications

Table 1-1: Rosemount 226 Toroidal Conductivity Sensor Specifications

Description Material and Units

Conductivity Range Refer to transmitter product data sheet

Wetted Materials Glass-filled PEEK, EPDM Gasket

Operating Temperature 32 to 248 °F (0 to 120 °C)

Maximum Pressure 295 psig (2135 kPa [abs])

Cable Length 20 ft. (6.1 m)

Maximum Cable Length Up to 200 ft. maximum

Process Connections 7/8 in. 9 UNC threads for flange mounting and 1

in. MNPT (with -80 option); see dimensional

drawings for more details.

Weight/Shipping Weight 2 lbs/3 lbs (1.0 kg/1.5 kg)

1.3 Unpacking and inspection

Complete the following steps when you unpack your instrument.

Procedure

1. Inspect the shipping container. If there is damage, contact the shipper immediately

for instructions.

2. If there is no apparent damage, unpack the container and remove the sensor.

3. Ensure that all items shown on the packing list are present. If items are missing, If

items are missing, contact your local Customer Care representative

4. Save the shipping container and packaging.

Reference Manual Description and specifications

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Rosemount 226 Sensors 7

They can be used to return the sensor to the factory in case of damage.

1.4 Ordering information

Table 1-2: Rosemount 226 Toroidal Conductivity Sensor ordering information

Model Sensor type

226 Toroidal Conductivity Sensor

Materials of Construction

02 Glass-filled PEEK (1)

Transmitter Compatibility (2)

54 Standard Cable (3)

56 EMI/RFI Shielded Cable (4)

Mounting Kit

80 Submersion (5)

81 Insertion Through User-Supplied Flange (6)

82 No Kit Required (7)

Typical Model Number: 226-02-56-80

(1) The sensor is supplied with an EPDM gasket (a Viton gasket PN 33151-01 is also available; see

accessories).

(2) Cables may be extended using the remote junction box PN 23550-00 (sold separately) and

extension cables (see accessories).

(3) Recommended for use with Rosemount legacy transmitter models 1054 and 2054.

(4) Recommended for use with Rosemount transmitter models 54C, 54eC, 81T, 2081T, 3081T,

4081T, XMT, 56, 1056, 1066, 5081, and 56.

(5) Includes a 1-in. MNPT PEEK adapter

(6) Includes spacer and nut

(7) This option does not include any mounting kit and is for replacement sensors only.

Description and specifications Reference Manual

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8 Reference Manual

2 Install

2.1 Installing the Sensor

To ensure accurate readings, it is recommended the sensor be installed so that there is at

least 2.4 inches of clearance between the sensor and tank or pipe walls. If installed too

closely to the walls, an error in readings will be induced by wall effects. Wall effects arise

from the interaction between the current induced in the sample by the sensor and nearby

pipe or vessel walls.

As Figure 2-1 shows, the measured conductivity can either increase or decrease depending

on the wall material. This effect can be seen by watching the conductivity readings change

as the sensor is moved closer to the sides of the pipe, tank, or beaker.

Ensure that the sensor is completely submerged in the process liquid. Mounting the sensor

in a vertical pipe run with flow running from bottom to top is recommended. If the sensor

must be installed in a horizontal pipe run, mount the sensor in the 3 o’clock or 9 o’clock

position.

Figure 2-1: Measured conductivity as a function of clearance between sensor and

walls

Reference Manual Install

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Rosemount 226 Sensors 9

Figure 2-2: Rosemount 226 with 1 in. MNPT process connection mounting adapter

(-80 option) dimensional drawing

Figure 2-3: Rosemount 226 with 7/8 in. 9 UNC thread and insertion through flange

mounting adapter (-81 option) dimensional drawing

Install Reference Manual

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10 Reference Manual

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