YOKOGAWA FU24 User manual

IM 12B06J03-03E-E
10th edition
Instruction
Manual
Model FU24
pH/ORP Combination sensor
with pressure compensation
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CONTENTS
1. PREFACE 6
1.1 Introduction 6
1.2 Unpacking and Checking 6
1.3 Warranty and Service 7
1.4 Serial number 7
2. GENERAL SPECIFICATIONS 8
2.1 Measuring elements 8
2.2 Wetted parts 8
2.3 Functional specifications (at 25°C) 8
2.4 Dynamic specifications 8
2.5 Operating range 8
2.6 Regulatory standards (only for sensor without suffix -VS) 9
2.7 Shipping details 9
2.8 Environmental conditions 9
2.9 Mechanical specifications 9
3. INSTALLATION OF FU24 10
3.1 Typical installation 10
3.2 Preparing the sensor for use 10
3.3 Mounting the sensor 10
4. DIMENSIONS 12
5. WIRING 13
5.1 Connections 13
5.2 Definition EXA/FLXA terminal numbers to FU24 sensor 13
5.3 Settings for PH402G and PH202G(S) 14
5.4 Settings for PH150, PH450G and FLXA 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 FU24 sensor 15
7. MODEL CODES 16
8. SPARE PARTS 16
9. CHEMICAL COMPATIBILITY CHART 17
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1. PREFACE
1.1 Introduction
This instruction manual provides
information for the installation and use of
the FU24 four-in-one wide body pH sensor,
which is especially designed for harsh
process applications.
The Model FU24 offers a simple and
cost effective solution for process
applications with fluctuating pressure and/
or temperature which normally limit 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.
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.
This all-in-one sensor provides
simultaneous measurement of pH, redox
(ORP) and temperature if desired. The
rugged PPS 40GF body is designed for
easy installation via the 1” NPT threaded
connections provided on both ends of the
sensor.
The FU24 sensor is available in two types:
• With fixed cable, 5 and 10 metres.
• With VarioPin connector:
(VP and VS-model)
The VP model can be used with an
analogue analyzer in combination with
universal WU10-V-S cable or halagon free
WE10-H-D cable. Both cables are available
in different lengths.
The VS model can be used with SA11-P1
Smart Adapter which is placed directly
on top of this connector, or remotely
connected using the 3 meter WE10-H-D-
003-V1 cable.
1.2Unpacking and Checking
Upon delivery, unpack the sensor carefully
and inspect it to ensure it was not
damaged during shipment. If damage is
found, retain the original packing materials
and then immediately notify the carrier and
the relevant Yokogawa sales office. Make
sure the Model Code and Serial Number
on the sensor are the same as on the
packing list. Also, check any option(s) that
were ordered are included and correct.
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1.4 Serial number
The Serial number is defined by nine (9)
alphanumeric characters:
X1X2Production location
X3X4Year/Month code
X5X6X7X8X9Tracking number
Example: N3P600028
Table 1:
Year Yearcode Year Yearcode
2014 P 2026 3
2015 R 2027 4
2016 S 2028 5
2017 T 2029 6
2018 U 2030 7
2019 V 2031 8
2020 W 2032 9
2021 X 2033 A
2022 Y 2034 B
2023 Z 2035 C
2024 1 2036 D
2025 2 2037 E
Table 2:
Month Monthcode
January 1
February 2
March 3
April 4
May 5
June 6
July 7
August 8
September 9
October A
November B
December C
1.3 Warranty and Service
Yokogawa products and parts are
guaranteed free from defects in
workmanship and material 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 are
excluded from this warranty coverage. In
the event of warranty claim, the defective
goods should be sent (freight paid) to the
Service Department of the relevant sales
Organization 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) have been exposed.
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p(bar)
Temp. (ºC)-10 25 50 1050
5
0
10 NPT
FSM
8
2. GENERAL SPECIFICATIONS
2.1 Measuring elements
: pH glass electrode
: Silver chloride reference
: Solid platinum electrode
: Pt1000 temperature sensor.
2.2 Wetted parts
Sensor body : PPS 40GF
Earthing pin : Solid Platinum
Measuring sensor : G-glass
LE glass tube : AR-glass
O-ring : Viton
Reference junction : Porous PTFE
Bellow system : Viton
2.3 Functional specifications (at 25°C)
Isothermal point : pH 7
Reference system : Ag/AgCl with saturated KCI
Glass impedance
- Dome shape : 100 MΩ nominal
- Flat Surface : 500 MΩ nominal
Junction resistance : 1.0 to 15 kΩ
Liquid outlet : non-flow double junction
Temperature element : Pt1000 to IEC 751
Asymmetry potential : 8 ± 15 mV
Slope : > 96 % (of theoretical value)
Note: The temperature sensor included in the FU24 is designed for cell compensation
and for indication. It is NOT designed for process temperature control.
2.4 Dynamic specifications
Response time pH : t90 < 15 sec. (for 7 to 4 pH step)
Response time temperature
- Dome shape : t90 < 1 min. (for 10 °C step)
- Flat surface : t90 < 4 min. (for 10 °C step)
Stabilization time pH : < 2 min. (for 0.02 pH unit during 10 sec.)
2.5 Operating range
pH : 0 to 14
ORP : -1500 to 1500 mV
rH : 0 to 100
Temperature
- Dome shape : -10 to 105 ºC (14 to 221 ºF)
- Flat Surface : +15 to 105 ºC (59 to 221 ºF)
Pressure :
Conductivity : > 10 µS/cm
Note: The pH operating range at room temperature is 0-14 pH, but at high temperatures or
range outside 2-12 pH the lifetime will be seriously shortened.
Note: Sensor is suitable for pure water applications
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2.6 Regulatory standards (Only for sensors without suffix -VS)
CE : Decision 768/2008/EC
- ATEX : Directive 2014/34/EU,
as amended by Regulation (EC) no. 1882/2003
-Certificate no. : DEKRA 11ATEX0014 X
II 1 G Ex ia IIC T3...T6 Ga
-Electrical data : For sensor input circuit connected to a certified intrinsically
safe circuit with the following maximum values:
Ui = 18 V; Ii = 170 mA; Pi = 0.4 W; Li = 0 mH;
Ci = 0 nF (VP type) or 3.6 nF (permanently connected cable)
or certified intrinsically safe Yokogawa pH/ORP transmitter
Model FLXA21/ 202 series or Model PH202S series.
-Special conditions(X) : T6 for Tamb. -40 °C to +40 °C
T4 and T5 for Tamb. -40 °C to +55 °C
T3 for Tam. -40 °C to +105 °C
: Electrostatic charges on the sensor enclosure shall be avoided.
- ROHS II :Directive 2011/65/EU
Applying articlecategory9; Industrial monitoring and control
instrumention selective electrodes.
- Pressure : Directive 2014/68/EU,
as amended by Regulation (EC) no. 1882/2003
-Applying article : 4.3 (Sound Engineering Practice)
: Damaging the screw thread of the sensor might influence
the maximum process pressure.
: Sensor contains glass parts which if broken can cause
cutting injuries.
IECEx
Applying standards : IEC 60079-0: 2012
IEC 60079-11: 2012
IEC 60079-26: 2007
Certificate no. : IECEx DEK 11.0064X
Ex ia IIC T3...T6 Ga
Note: When the sensor has been connected to none intrinsically safe equipment
which exceeds the restrictions regarding the sensor input circuit (see electrical data),
the sensor is not suitable anymore for intrinsically safe use.
2.7 Shipping details FU24-05/10 FU24-VP/VS
Package size (LxWxH) 410x130x75 300x100x75 mm
16.1x5.1x3.0 11.8x3.9x3.0 inch
Package weight (max.) 0.92 kg (2.02 lbs) 0.33 kg (0.73 lbs)
2.8 Environmental conditions
Storage temperature : -10 to 50 ºC (14 to 122 ºF)
Water proof : IP67 (conform IEC 60529)
2.9 Mechanical specifications
Max. torque on sensor body: 7,5 Nm
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3. INSTALLATION OF FU24
For optimum measurement results, the FU24
should be installed in a location that offers
an acceptable representation of the process
composition and DOES NOT exceed the
specifications of the sensor. The FU24 is
designed with 1” NPT threaded connections
on both ends of the sensor to allow
installation in a wide variety of applications.
3.1 Typical installation
The FU24 sensor is designed for versatile
in-line, immersion or bypass loop
installation. For best results the FU24
should be mounted with the process flow
coming towards the sensor. The sensor can
be mounted in all angles with respect to the
horizontal plane.
3.2 Preparing the sensor for use
Remove the sensor from its shipping box
and slide off the so-called ‘wet pocket’, the
tube filled with solution to prevent drying out
of the measuring elements during shipment
or storage. It is recommended to calibrate
the sensor before first use.
A general calibration procedure is described
in Section 6 of this Instruction Manual.
3.3 Mounting the sensor
The simplest mounting is to use one of
the 1” NPT threaded connection of the
sensor. Apply Teflon tape to the appropriate
threaded end, then install the sensor in the
process. Tighten the sensor using a wrench
on the sensor flats.
The FU24 can also be mounted in a
FF20-*22 and FF20-*33 flow fitting or
put in the process by making use of the
FS20-*22 and FS20-*32 subassembly. In
both cases this can be realized by using
one of the spare part adapters
(see Section 8 for ordering information).
1 Apply Teflon tape to the threaded end of
the sensor;
2 Install the sensor in the adapter. Tighten
the sensor using a wrench on the sensor
flats (see Figure 1 and 2).
Note: DO NOT over tighten the sensor
to prevent damage. The maximum
applicable torque is 7,5 Nm. Figure 1. FS20 installation example FU24
K1521JA
FS20-S32-WE
O-ring
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Figure 2. FF20-.33 installation example FU24
TeflonTape
FU24
PG7
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Figure 3. Dimensions FU24
4. DIMENSIONS
Dimensions in mm (inches)
28.0 [1.10"]
71.0 [2.80"]
33.3 [1.31"]
193.0 [7.61"]
260.9 [10.28"]
28.0 [1.10"]
178.4 [7.03"]
246.2 [9.70"]
56.4 [2.22"]
247.0 [9.73"]
TYPE: NPT
TYPE: FSM
TYPE: VP/VS NPT
232.4 [9.16"]
TYPE: VP/VS FSM
1"NPT
1"NPT
XXXX
D
B
C
A
F
E
XXXX
XXXX
XXXX
G
H
PG7
PG7
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5. WIRING
5.1 Connections
The FU24 sensor is provided with a fixed cable or Variopin (VP/VS) connector.
5.2 Definition EXA/FLXA terminal numbers to FU24 sensor
FU24-05/10 wire #
pH ORP
EXA/FLXA terminal # pH+ORP ORP pH compensated
pH+rH
11 11 11 11
12 12 12 12
13 13 13 15
14 14
15 15 14 14
16 16
17 16
FU24-VP and FU24-VS with WU10/WE10- wire color
WU10-V-S WU10-V-D, WE10 WU10-V-D or WE10
ORP
EXA/FLXA terminal # pH ORP pH compensated
11 Red Red Red
12 Blue Blue Blue
13 Brown Brown Coax1 core transparent
14 Yellow
15 Coax core transparent Coax2 shield white Coax2 core white
16 Black
17 Coax2 core transparent
Note: For ORP measurement the EXA/FLXA terminals 13 and 14 should be interconnected.
For ORP pH compensated measurement the EXA/FLXA terminals 14 and 15 should
be interconnected.
Note: The new digital solution with suffix -VS can only function in combination with the
SMART adapter SA11-P1.
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6.1 Calibration for pH measurement
To calibrate the FU24 pH/ORP sensor, two buffer solutions with known pH values
are required. It is recommended that one buffer solution has a value near to pH 7.00.
Depending on the process value to be measured, the second buffer solution should be
either acidic (below pH 7.00) or alkaline (above pH 7.00). Normally the IEC buffers (pH 4.01,
6.87 and 9.18) are used.
The following is a very general 2-point calibration procedure:
1. Clean the sensor using a 5% solution of HCl;
2. Rinse sensor thoroughly with demineralized water;
3. Immerse the sensor in the first buffer (pH 6.87 is recommended) and
execute calibration as described in the Instruction Manual of the analyzer.
4. Rinse sensor thoroughly with demineralized water;
5. Immerse the sensor in the second buffer (pH 4.01 or 9.18 is recommended)
and execute calibration as described in the Instruction Manual of the analyzer.
6. Rinse sensor thoroughly with demineralized water.
During calibration, the temperature compensation should be active.
The EXA/FLXA analyzer automatically compensates for the sensitivity change of the
pH sensor at different temperatures.
After calibration, replace or re-install the sensor into the process.
5.3 Settings for PH402G and PH202G(S)
Function pH pH&ORP pH&rH ORP pH compensated
Setting (default) ORP
code 01 0(pH) 0(pH) 0(pH) 1(ORP) 1(ORP)
code 02 0(off) 1(ORP) 2(rH) 0(off) 0(off)
code 03 1.1.1 1.1.1 1.1.1 0.0.1 0.0.1
code 04 0.0.1 0.0.1 0.0.1 0.0.1 1.1.1
code 31 0 2 2
jumper input 1 no no no yes yes
jumper input 2 yes yes yes yes no
5.4 Settings for PH150, PH450G and FLXA
Function pH pH&ORP pH&rH ORP pH compensated
Setting (default) ORP
sensor setup pH pH+ORP pH+ORP ORP ORP
measurement
setup pH+ORP pH+rH
Impedance
setting
input1 High High High Low Low
input 2 Low Low Low Low High
jumper input 1 no no no yes yes
jumper input 2 yes yes yes yes no
6. GENERAL CALIBRATION & MAINTENANCE PROCEDURE
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6.2 Calibration for ORP and rH measurement
For calibration of ORP and rH, the procedure for MANUAL CALIBRATION can be used as
described in the Instruction Manual of the analyzer.
The rH value is a function of the reference system and the pH value of the buffer solution.
The FU24 sensor has a reference system of saturated Silver/Silver Chloride (Ag/AgCl).
The commonly used standards for ORP and rH calibration are made from Chinhydron
(Quinhydrone) powder dissolved in pH buffer solutions (1 g / 200 ml). In Table 3 the
measurement values are given as function of the used pH buffer solution with Chinhydron
powder. The accuracy of the standards is approximately ± 10 mV.
Table 3: ORP, pH compensated ORP and rH as function of pH buffer solution with
Chinhydron powder.
pH buffer ORP (mV) pH compensated rH
ORP (mV)
1.68 403 88 23.6
4.01 265 88 23.6
6.87 96 88 23.6
7.00 88 88 23.6
6.3 Maintenance of the FU24 sensor
A pH sensor requires routine maintenance to keep the measuring elements clean and
functioning. Depending on the process, different cleaning solutions may be required.
Avoid cleaning the complete sensor with solution. Some cleaning solutions will
damage the modelcode sticker and connector which are placed on top of the
sensor. Only clean the measuring elements at the bottom side of the sensor.
In most cases cleaning with water, iso-propanol or methanol is sufficient. In other cases the
measuring elements of the sensor have to be cleaned with specific solutions.
Examples:
1. Deposits of limes, hydroxides or carbonates can be removed by immersing the bottom
part of the sensor in a solution containing dilute hydrochloric acid (5% is recommended).
Afterwards rinse the sensor with water.
2. Deposits of oil and fat can be removed with hot water with a detergent. When the results
are unsatisfactory, a mild (carbonate based) abrasive can be used.
3. Protein deposits should be removed with a protein enzymatic solution, for instance a
solution containing 8.5 mL concentrated hydrochloric acid and 10 grams of pepsin in
1 liter of water.
Note: Avoid cleaning with non-polar solvent like tri-chloro ethylene, toluene or hexane. The
non-polar solvents will break up the gel-layer on the pH glass bulb and requires that
the sensor has to be soaked in water for at least 12 hours before it will function again.
The Teflon diaphragm of the sensor can be regenerated by putting it in hot (± 70°C, 158°F)
3 molar Potassium Chlorine (KCl) solution and letting it cool down to room temperature. This
procedure clears the diaphragm and will soak the diaphragm with conductive KCl again.
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7. MODEL CODES
Model Code Suffix Code Option Description
FU24 Wide body sensor
Type - VP Variopin connector
- VS Variopin connector for SENCOM
- 05 Fixed cable, 5 meter
- 10 Fixed cable, 10 meter
Temp. element - T1 Pt1000
Model - NPT Dome shape model
- FSM Flat surface model
8. SPARE PARTS
Spare part Description
FU24
K1521JA SS holder 1” NPT
K1521JB PVDF holder 1” NPT
Buffer solutions
K1520BA Starters Kit: (3x 500 ml) Solution pH 4.01, pH 6.87, pH 9.18
K1520BB Buffer Solution (500 ml) pH 1.68
K1520BC Buffer Solution (500 ml) pH 4.01
K1520BD Buffer Solution (500 ml) pH 6.87
K1520BE Buffer Solution (500 ml) pH 9.18
Connection equipment for Suffix -05,-10,-VP
BA10 Junction box for pH extension cables
WF10-XXX-F pH signal cable with terminated ends.
Available lenghts (XXX = 005, 010, 025 & 050 m)
WU10-V-D-XX Variopin cable (XX = 02, 05, 10, 15 and 20m)
WU10-V-S-XX Variopin cable (XX = 02, 05, 10, 15 and 20m)
Connection equipment for Suffix -VS
BA11 Active connection
WE10-H-D-XX Extension cable for SENCOM SMART ADAPTER SA11
SA11-P1- SENCOM SMART adapter
WU11 Interconnection cable
IB100 Interface box
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Note: Information in this list is based on our general experience and literature data and
given in good faith. However Yokogawa is unable to accept responsobility for claims
related to this information.
9. CHEMICAL COMPATIBILITY CHART
Conc.%
Temp. °C
20 60 100 20 60 100 20 60 100 20 60 100
OOOOOOOOOOOO
OOOOOOXXXOOO
OOOOOO X X - OOO
OOOOOOOOO
OOOOOOOOOOOO
OOOOOOOOOOOO
O O X OOOOOOOOO
---OOOXXXOOO
---OOO---OOO
---OOOOOO
OOOOOOOOOOOO
OOOOOOOOOOOO
X X - OOOOOOOOO
OOOOOOXXXXXX
O O X OOO------
---dicacitecA OOOOOOOOO
---OOOOOOO
---dicacimroF OOOOOOOO
Citric acid OOOOOOOOOOOO
Calcium hydroxide OOOOOOOOOOOO
Potassium hydroxide OOOOOOOOOOO X
XXXedixordyhmuidoS OOOOOOOO X
XXXretawniainommA OOOOOOOO X
Ammonium chloride OOOOOOOOOOOO
Zinc chloride OOOOOOOOOOOO
Iron(III) chloride OOOOOOOOOO
---etiflusmuidoS OOOOOOOOO
Sodium carbonate OOOOOOOOOOOO
Potassium chloride OOOOOOOOOOOO
Sodium sulfate OOOOOOOOOOOO
Calcium chloride OOOOOOOOOOOO
Sodium chloride OOOOOOOOOOOO
Sodium nitrate OOOOOOOOOOOO
Aluminium chloride OOOOOOOOOOOO
Hydrogen peroxide OOOOOO X - - OOO
OOOXOOOXOOedirolhcopyHmuidoS
Potassium dichromate OOOOOO X OOO
OOOOOOemildetanirolhC
--XlonahtE OOOOOOOOO
Cyclohexane OOOOOOOOOOOO
---eneuloT OOOOOOOOO
XXXenahteorolhcirT OOOOOOOO
Water OOOOO X OOOOOO
Note: Information in this list is based on our general experience and literature data and given in g
o
However Yokogawa is unable to accept responsibility for claims related to this information.
O = can be used; X = shortens useful life; - = cannot be used; Blank = no data available
50
sat.
Viton
Material
Phosphoric acid
50
95
fuming
25
50
Nitric acid
Inorganic acid
10
Sulfuric acid
95
fuming
glacial
80
50
Hydrochloric acid
95
40
75
25
Hydrofluoric acid
10
Organic acidAlkaliAcid saltBasic salt
Organic
solvent
sat.
50
sat.
sat.
50
40
30
Neutral salt
50
80
sat.
50
10
Oxidizing
agent
30
50
sat.
sat.
sat.
sat.
sat.
sat.
PPS
(Ryton) Glass
PTFE
(teflon)
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IM 12B06J03-03E-E Printed in The Netherlands, 10-1808
Subject to change without notice
Copyright ©
IM 12X0X0-E-E
Subject to change without notice Printed in The Netherlands, 00-000 (A) I
Copyright ©
Yokogawa has an extensive sales and
distribution network.
Please refer to the European website
(www.yokogawa.com/eu) to contact your
nearest representative.
YOKOGAWA EUROPE BV
Euroweg 2
3825 HD AMERSFOORT
The Netherlands
www.yokogawa.com/eu
YOKOGAWA ELECTRIC CORPORATION
World Headquarters
9-32, Nakacho 2-chome, Musashino-shi
Tokyo 180-8750
Japan
www.yokogawa.com
YOKOGAWA CORPORATION OF AMERICA
2 Dart Road
Newnan GA 30265
USA
www.yokogawa.com/us
YOKOGAWA ELECTRIC ASIA Pte. LTD.
5 Bedok South Road
Singapore 469270
Singapore
www.yokogawa.com/sg
YOKOGAWA CHINA CO. LTD.
3F Tower D Cartelo Crocodile Building
No.568 West Tianshan Road Changing District
Shanghai, China
www.yokogawa.com/cn
YOKOGAWA MIDDLE EAST B.S.C.(c)
P.O. Box 10070, Manama
Building 577, Road 2516, Busaiteen 225
Muharraq, Bahrain
www.yokogawa.com/bh
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