Yokogawa FU24F User Manual

Instruction
Manual

Model FU24F
pH/ORP SENCOM™ sensor

IM 12B6J8-01E-E

1st edition

2

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IM 12B6J8-01E-E

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IM 12B6J8-01E-E

4

CONTENTS

1. PREFACE 5

1.1 Introduction 5

1.2 Unpacking and Checking 5

1.3 Warranty and Service 6

1.4 Serial Number definition 6

2. GENERAL SPECIFICATIONS 7

2.1 Measuring elements 7

2.2 Wetted parts 7

2.3 Functional specifications (at 25°C) 7

2.4 Dynamic specifications 7

2.5 Operating range 8

2.7 Power supply (Supply+ versus Supply Gnd) 8

2.8 Regulatory standards 9

2.9 Shipping details 12

2.10 Environment and operational conditions 12

2.11 Mechanical specifications 12

3. INSTALLATION OF FU24F 12

3.1 Typical installation 12

3.2 Mounting the sensor 12

3.3 Preparing the sensor for use 12

4. DIMENSIONS 13

5. WIRING 14

6. GENERAL CALIBRATION & MAINTENANCE PROCEDURE 14

6.1 Calibration for pH measurement 14

6.2 Calibration for ORP and rH measurement 15

6.3 Maintenance of the FU24F sensor 15

7. MODEL CODE 16

8. SPARE PARTS 16

9. EU DECLARATION OF CONFORMITY 17

10. CHEMICAL COMPATIBILITY CHART 19

IM 12B6J8-01E-E

1. PREFACE

5

1.1 Introduction

This Instruction Manual provides information
for the installation and use of the FU24F
SENCOM™ sensor. This digital sensor
shows how Yokogawa applies the motto
“Simply the Best” to sensor technology.
Setup of the sensor is very easy because
all sensor specific characteristics, such as
calibration data, are stored in the sensor.
The FU24F SENCOM™ sensor holds
four separate measuring elements in one
unbreakable and chemical resistant
PPS 40GF (RytonTM) wide body:

• pH glass electrode.

• Long life saturated Ag/AgCl reference

system with double junction, combined
with ion-trap to prolong the lifetime of
the reference probe even in chemically
unfavorable environments.

• Integral Pt1000 element for accurate

temperature measurements.

• Solid Platinum ORP/LE electrode for

accurate simultaneous pH and ORP
measurements.

The Model FU24F offers a simple and
cost effective solution for process

applications with fluctuating pressure and/

or temperature which normally limits the
lifetime of a sensor.

By using the patented Bellow system a
strong pressure compensation mechanism
is created. This ensures immediate interior
pressure equalization to the outside process
pressure, making the sensor virtually
insensitive to process pressure variations.

Other valuable features of the sensor:

• PTFE reference diaphragm to prevent

fouling.

• Polymerized electrolyte to extend the

sensor lifetime.

• Available in two versions, a robust dome

shape model for applications with a
limited amount of solids, and a flat surface
model for application in slurries, such as
in the pulp and paper industry.

• Versatile in-line or off-line installation.

The FU24F is provided with a multipole
M9 male connector for connection to the

Yokogawa FLXA analyzer using the WU11

interconnection cable for SENCOM™

sensors. This cable, available in 4 fixed

lengths, is specified for reliable transfer of
digital signals and especially designed to be
installed in a heavy industrial environment.
The double shielded cable will protect both
the sensor and the analyzer for interference
from high voltages and currents which are
present on other cables.

1.2 Unpacking and Checking

Upon delivery, unpack the sensor carefully
and inspect it to ensure that it is not
damaged during shipment. If damage is
found, retain the original packing material
and immediately notify the carrier and the
relevant local Yokogawa Sales Office.
Make sure the Model Code and Serial
Number on the sensor are the same as on

the packing list. Also check if option(s) that

were ordered, are included and correct.

A slight overpressure caused by the bellow

tension prevents process fluid ingress and
maintains a positive ion flow out of the
sensor. This feature is of particular interest
in pure water applications.

IM 12B6J8-01E-E

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1.3 Warranty and Service

Yokogawa products are guaranteed free
from defects in workmanship and materials
under normal use and service for a period
of (typically) 12 months from the date of
shipment from the manufacturer. Individual
Sales organizations can deviate from the
typical warranty period, and the conditions
of sale relating to the original purchase
order should be consulted. Damage caused
by wear and tear, inadequate maintenance,
corrosion, or by the effects of chemical

processes is excluded from this warranty

coverage. In the event of a warranty claim,
the defective goods should be sent (freight
paid) to the Service Department of the
relevant Yokogawa Sales office for repair or
replacement (at Yokogawa’s discretion).

The following information must be included
in the letter accompanying the returned
goods:

• Model Code and Serial Number.

• Original Purchase Order and Date.

• Length of time in service and description

of the process.

• Description of the fault and circumstances

of the failure.

• Process/environmental conditions that

may be related to the failure of the sensor.

• Statement as to whether warranty or non-

warranty service is requested.

• Complete shipping and billing instructions

for return of material, plus the name and
phone number of a contact person that
can be reached for further information.

• Clean Statement
Returned goods that have been in
contact with process fluids must be
decontaminated and disinfected prior
to shipment. Goods should carry a
certificate to this effect, for the health and
safety of our employees. Material Safety
Data sheets must be included for all
components of the process to which the

sensor (options) has been exposed.

1.4 Serial Number definition

The Serial Number is defined by nine (9)
alphanumeric characters:

X1X2 Production Location
X3X4 Year/Month code
X5X6X7X8X9 Tracking number

Example: N1B600028

Table 1:

Production year according to
DIN. IEC 60062

Year Year code Year Year code

2010 A 2023 R

2011 B 2024 S
2012 C 2025 T
2013 D 2026 U

2014 E 2027 V

2015 F 2028 W

2016 H 2029 X
2017 J 2030 A

2018 K 2031 B

2019 L 2032 C

2020 M 2033 D
2021 N 2034 E
2022 P 2035 F

Table 2:

Production month code according to
DIN. IEC 60062

Month Month code

January 1
February 2
March 3

April 4

May 5
June 6
July 7

August 8

September 9
October O
November N
December D

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