Rosemount Quick Start Guide: Rosemount™ Hx338+ Steam Sterilizable and Autoclavable Pre-Pressurized pH Sensor Manuals & Guides

Quick Start Guide

00825-0100-3338, Rev AA

June 2019

Rosemount™ Hx338+

Steam Sterilizable and Autoclavable Pre­Pressurized pH Sensor

Quick Start Guide June 2019

Essential instructions

Read this page before proceeding!

Emerson designs, manufactures, and tests its RosemountTM products to meet many national and
international standards. Because these instruments 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 instrument, and warranty invalidation.

• Read all instructions prior to installing, operating, and servicing this product. If this instruction

manual is not the correct manual, call 1-855-724-2638, and we will provide the requested
manual. Save this manual for future reference.

• 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 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 Rosemount. Unauthorized parts and procedures can affect the product's
performance, place the safe operation of your process at risk, and VOID YOUR WARRANTY. Look
alike 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 people, to prevent electrical shock and personal
injury.

Contents

Plan..............................................................................................................................................3

Install........................................................................................................................................... 8

Wiring.......................................................................................................................................... 9

Calibrate.................................................................................................................................... 15

Maintaining and troubleshooting............................................................................................... 17

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June 2019 Quick Start Guide

1 Plan

1.1 Electrode preparation

Procedure

1. Remove electrode from shipping container.

2. Remove the protective boot covering the electrode bulb.

3. Rinse away salt film with clean water and then shake the electrode so
that the internal solution fills the bulb, thus removing any air trapped
there.

Note

Do not allow lubricant to coat electrode bulb or reference junction. If
it does, wipe it clean before installation.

1.2 Storage and handling

Proper storage and handling instructions of the electrodes must be followed
to ensure correct measurements.

Procedure

1. Store the electrodes in their original shipping containers until
needed.

2. Do not store at temperatures below -5 °C (23 °F).

3. Store the electrodes with a protective cap containing KCI solution
(PN 9210342).

4. For overnight storage, immerse the sensor in tap water or 4 pH
buffer solution.

5. Use the startup and calibration procedure described in Two point

buffer calibration to properly calibrate the sensors.

6. The standard sensor shelf life is one year from manufacturing date.
Follow the refresh procedure described in Electrode refresh

procedure at one year and eighteen months to extend the shelf life

to a maximum of two years.

1.3

Table 1-1: Rosemount™ Hx338+ Sensor Specifications

Specifications Materials and units

Operating temperature range 32 to 283 °F (0 to 140 °C)

Pressure range 0 to 6 bar

Quick Start Guide 3

Specifications

Quick Start Guide June 2019

Table 1-1: Rosemount™ Hx338+ Sensor Specifications (continued)

Specifications Materials and units

pH range 0 to 14

Measuring method

Combination electrode pH potential measured against reference

Wetted materials

pH electrode Glass

O-ring EPDM (FDA approved)

Operations parameters

Process connection PG 13.5

Electrical connector Variopol (VP 6.0)

Minimum conductivity of sample 100 µS/cm

Zero-point 0 ±20 mV

Sensitivity 57 to 59 mV / pH at 77 °F (25 °C)

Electrolyte Pressurized

Temperature sensor Pt-100

electrode

WARNING

Pressure and temperature

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!

Do not exceed temperature and pressure limitations of 284 °F (140
°C) and 6 bar.

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June 2019 Quick Start Guide

WARNING

Corrosive substance

Hydrofluoric acid and the mixture of hydrochloric acid and thiorea is toxic
and highly corrosive.

Avoid skin contact; wear protective gloves.
Use only in a well-ventilated area.
Do not inhale fumes.
In case of an accident, consult a doctor immediately.

CAUTION

Sensor/process application compatibility

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

Application compatibility is entirely the operator's responsibility.

1.4 Rosemount™ Hx338+ Sensor design specifications

See Figure 1-1 for sensor dimensions.

Quick Start Guide 5

Quick Start Guide June 2019

Figure 1-1: Rosemount Hx338+-01-72 Dimensional Drawing

A. VP 6.0 plug
B. SW-19 free spinning PG13.5 screw thread
C. Washer

D. O-ring

6 Emerson.com/Rosemount