Emerson Rosemount 398R Manual de usuario

Rosemount™ 398R/398RVP

pH/ORP Sensors

Reference Manual

00809-0100-3098

Rev. AB

February 2019

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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,

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

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

Reference 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.

Essential Instructions

Read this page before proceeding!

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

Hazardous Area InstallationN

This sensor is not Intrinsically Safe. or Explosion Proof. Installations near flammable liquids or in hazardous

area locations must be carefully evaluated by qualified on site safety personnel.

To secure and maintain an intrinsically safe installation, an appropriate transmitter/safety barrier/sensor

combi nation must be used. The installation system must be in accordance with the governing approval

agency (FM, CSA or BASEEFA/CENELEC) hazardous area classification requirements. Consult your trans-

mitter instruc tion manual for details.

Proper installation, operation and servicing of this sensor in a Hazardous Area Instal lation is entirely the

responsibility of the user.

DANGER

WARNING

Retractable sensors must not be inserted nor retracted when process pressures are in excess of 64 psig

(542kPa) for option 21 or 35 psig (343 kPa) for option 25.

1. All pH/ORP sensors have a plastic enclosure which must only be cleaned with a damp cloth to avoid the

danger due to a build up of an electrostatic charge.

2. All pH/ORP sensor models are intended to be in contact with the process fluid and may not meet the

500V r.m.s. a.c. test to earth.

This must be taken into consideration at installation.

Special Conditions for Safe Use

CAUTION

Contents

Section 1: Description and Specifications

1.1 Features and Applications ....................................................................................1

1.2 Specifications ......................................................................................................2

1.3 Product Certifications..........................................................................................3

1.4 Ordering Information...........................................................................................4

Section 2: Installation

2.1 First Time Installation ..........................................................................................7

2.2 Unpacking and Inspection ...................................................................................8

2.3 Mechanical Installation ........................................................................................8

Section 3: Wiring the Rosemount 398R/398RVP Sensor

3.1 Wiring for Rosemount 398R/398RVP Sensor ......................................................15

Section 5: Calibration

5.1 General Information ..........................................................................................27

5.2 Use of Calibration Buffers (Standards)................................................................27

5.3 Two Point Buffer Calibration...............................................................................28

5.4 pH Standardization............................................................................................28

5.5 ORP Standardization..........................................................................................29

Section 6: Maintenance

6.1 Maintenance......................................................................................................31

6.2 Sensor Removal .................................................................................................31

6.3 Cleaning Procedures - pH Sensors ......................................................................32

6.4 Cleaning Procedures - ORP Sensors ....................................................................34

6.5 Checking the Reference Electrode......................................................................34

6.6 Rejuvenating Reference Electrodes ....................................................................35

6.7 Temperature Element ........................................................................................35

6.8 Sensor Tube Replacement When Used With A Sensor Head unction Box............36

Section 7: Troubleshooting

7.1 Troubleshooting ................................................................................................39

Section 8: Accessories

8.1 Accessories........................................................................................................43

EC Declaration of Conformity ...............................................................................45

Intrisicallly Safe Sensor Installation Drawing - FM ......................................49

Reference Manual Table of Contents

00809-0100-3098 February 2019

Table of Contents i

Table of Contents Reference Manual

February 2019 00809-0100-3098

ii Table of Contents

Section 1: Description and Specifications

1.1 Features and Applications

Rosemount 398R and 398RVP sensors feature a chemical resistant construction of Tefzel, titanium,

and a TUp reference junction which is ideal for measuring p in harsh process liquids. These

sensors can be used to measure p in sour water strippers, in pulp bleaching towards that use

chlorine dioxide, and in process streams containing a variety of organic solvents. These sensors are

designed for use with a 1-1/4 inch or 1-1/2 inch ball valve.

Description and Specifications 1

Reference Manual Description and Specifications

00809-0100-3098 February 2019

Figure 1-1: Cross Section Diagram of the TUpH Reference Technology

All TUp sensors are designed with a large area reference junction, helical reference pathway, and an

AccuGlass p glass bulb. This sensor technology ensures superior performance while only requiring

minimal maintenance.

2 Description and Specifications

Description and Specifications Reference Manual

February 2019 00809-0100-3098

Table 1-2: Rosemount 398R-398RVP sensor specifications

Measured Range

p range 0 to 14 p , GP T ACCUGLASS

ORP range -1500 mV to 1500 mV

Maximum Pressure at Retraction or Insertion

64 psig (524 kPa abs) Code 21

35 psig (343 kPa abs) Code 25

Minimum Conductivity

75 μS/cm, nominal 100 μS/cm

Maximum Process Pressure and Temperature

emi bulb: 250 psig (1825 kPa abs) at 212°F (100°C)

Flat bulb: 100 psig (790 kPa abs) at 212°F (100°C)

Wetted Materials

Titanium, Tefzel®, glass, platinum (ORP only), and choice of Viton® or Kalrez®

Reference

Permeable Tefzel with secondary helical pathway

Weight/Shipping Weight

Sensor Code 21; 2.0 lb/3.0 lb (.9kg/1.40kg)

Code 25; 3.0 lb/4.0 lb (1.40 kg/1.80kg)

Process Connections

With ball valve 1-1/2 in.

Without ball valve 1 in.

Cable Length

Rosemount 398R Standard 15 ft. Integral Cable; Optional 9.5 inch Cable for wiring to Sensor ead Junction

Boxes

Rosemount 398RVP Must use VP interconnect cable (sold separately)

1.2 Specifications

p Range emi Bulb

0-2 p 94%

2-12 p 99%

12-13 p 97%

13-14 p 92%

Table 1-1: Percent linearity over p

Description and Specifications 3

Reference Manual Description and Specifications

00809-0100-3098 February 2019

1.3 Product Certifications

Please see online certificates for further details.

IECEx

Sensors with no preamp (p and ORP) – Ex ia IIC T4 Ga (-20°C ≤ Ta ≤ +60 °C)

Sensors with SMART preamp (398RVP p only) – Ex ia IIC T4 Ga (-20 °C ≤ Ta ≤ +60 °C)

Per standards IEC60079-0 : 2011, IEC 60079-11 : 2011

ATEX

Sensors without preamp (p and ORP) – II 1 G Ex ia IIC T4 Ga (-20 °C ≤ Ta ≤ +60 °C)

Sensors with SMART preamp (398RVP p only ) – II 1 G Ex ia IIC T4 Ga (-20˚C ≤ Ta ≤ +60 °C)

Per standards EN 60079-0: 2012+A11:2013, EN 60079-11:2012

See online FM Certificate of Compliance for applicable sensor options:

Intrinsically Safe for use in Class I, II, and III, Division 1, Groups A, B, C, D, E, F, and G; Temperature

Class T6 Ta = -20 °C to +60 °C

Intrinsically Safe for use in Class I, Zone 0, AEx ia IIC T6 Ta = -20 °C to +60 °C

Nonincendive for use in Class I, Division 2, Groups A, B, C, and D; Temperature Class T6 Ta = -20 °C

to +60 °C

Suitable for use in Class II and III, Division 2, Groups E, F, and G; Temperature Class T6 Ta = -20 °C

to +60 °C azardous (Classified) Locations

IS/I,II,III/1/ABCDEFG/T6 Ta = 60°C - 1400332; Entity; I/0/AEx ia IIC/T6 Ta = 60 °C - 1400332; Entity;

NI/I/2/ABCD/T6 Ta = 60 °C; S/II,III/2/EFG/T6 Ta = 60 °C

Per standards 3600:1998, 3610:2010, 3611:2004, 3810:2005

CSA

See online CSA Certificate of Compliance for applicable sensor options:

Sensors with preamp – Intrinsically Safe:

Class I, Division 1, Groups ABCD; Class II, Division 1, Groups EFG; Class III; Class I, Division 2, Groups

ABCD; Ambient temperature rating -20 °C to +60 °C; Ex ia IIC; T6

Sensors without preamp – Intrinsically Safe and Non-Incendive:

Class I, Division 1, Groups ABCD; Class II, Division 1, Groups EFG; Class III; Class I, Division 2,

Groups ABCD; Ex ia IIC; T6; Ambient temperature rating -20 °C to +60 °C: (Simple Apparatus)

Per standards C22.2 No. 0-10, C22.2 No. 0.4-M2004, C22.2 No. 94-M1991, C22.2 No. 142 –

M1987, C22.2 No 157 – M1992, CAN/CSA E60079-0:07, CAN/CSA E60079- 11:02, UL50 11th

Ed, UL508 17th Ed, UL913 7th Ed, UL 60079-0: 2005, UL 60079-11: 2002

Description and Specifications Reference Manual

February 2019 00809-0100-3098

4 Description and Specifications

1.4 Ordering Information

Table 1-4: Rosemount 398R ordering information

Model Sensor type

398R p /ORP Sensor

Measuring Electrode Type

10 p - GP T Glass

12 ORP

13 p - GP T Flat Glass

Sensor Length

21 21 Inch Titanium Tube

25 36 Inch Titanium Tube

O-ring Material

30 EPDM

31 Viton

32 Kalrez

Transmitter/TC Compatibility

54 Pt-100

Cable Options

_ No Selection

60 9.5 Inch Cable with BNC (1)

61 9.5 Inch Cable without BNC (1)

62 15 ft (4.6 m) Cable without BNC (2)

Typical Model Number: 398R-10-21-30-54-62

1. For use with sensor-head junction boxes.

2. For use with Rose ount 1056, 1057, 1066, 56, and 56 Trans itters.

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