YOKOGAWA SC25V User manual
IM 12B06J01-40EN-P
2nd edition
Instruction
Manual
Model SC25V
Combination 12mm sensor;
pH, Ref, LE and Temperature
2
IM 12B06J01-40EN-P
(BG)
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Yokogawa.
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3
IM 12B06J01-40EN-P
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4
IM 12B06J01-40EN-P
Contents
1. PREFACE.....................................................................................................................5
1.1 Introduction........................................................................................................5
1.2 Unpacking and Checking ...................................................................................5
1.3 Warranty and Service.........................................................................................5
1.4 Serial number.....................................................................................................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................................................................................................7
2.6 Shipping details.................................................................................................8
2.7 Environmental conditions..................................................................................8
2.8 Mechanical specifications..................................................................................8
2.9 Regulatory standards........................................................................................9
3. INSTALLATION OF SC25V........................................................................................21
3.1 Typical installation............................................................................................21
3.2 Preparing the sensor for use............................................................................21
3.3 Mounting the sensor.........................................................................................21
4. DIMENSIONS..............................................................................................................23
5. WIRING.......................................................................................................................24
6. GENERAL CALIBRATION & MAINTENANCE PROCEDURE....................................25
6.1 Calibration for pH measurement.......................................................................25
6.2 Maintenance of the SC25V sensor...................................................................25
7. MODEL CODES..........................................................................................................26
8. SPARE PARTS...........................................................................................................26
9. CHEMICAL COMPATIBILITY CHART........................................................................27
5
IM 12B06J01-40EN-P
1. PREFACE
1.1 Introduction
This instruction manual provides
information for the installation and use of
the SC25V, combined 12mm glass sensor
(pH, Ref, LE and Temperature). The
SC25V is the best choice for the majority
of typical process- and waste- water
applications. The sensor is designed with
titanium liquid earth (LE), increased
electrolyte reservoir and large surface
area PTFE diaphragm combined with a
long pathway inner junction resulting in a
longtime stability and prolonged lifetime.
1.2 Unpacking 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.
For some specific sensor information, the
size of the sensor label is not big enough.
For that reason and specifically for
information related to the intrinsically
safety compliance of FM-US and FM-
Canada, a separate label is delivered.
This label needs to be connected, in case
of use in United States and Canada in a
hazardous area, onto the sensor cable.
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
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.
6
IM 12B06J01-40EN-P
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: Production Year code
Year
Year
code
Year
Year
code
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: Production Month code
Month
Month code
January
1
February
2
March
3
April
4
May
5
June
6
July
7
August
8
September
9
October
A
November
B
December
C
IM 12B06J01-40EN-P
2. GENERAL SPECIFICATIONS
2.1 Measuring elements : pH glass electrode
: Silver/Silver chloride reference
: Solid platinum electrode
: Pt1000 temperature sensor
2.2 Wetted parts
Sensor body / shaft : AR-Glass, PEEK
Earthing ring : Titanium
Measuring sensor : Glass (type G or L)
O-ring : Viton (EPDM back-up)
Reference junction : Porous PTFE
2.3 Functional specifications (at 25 °C)
Isothermal point : pH 7 / 3.3M KCl
Reference system : Ag/AgCl with saturated KCI
Glass impedance
- G-Glass : 200 Mnominal
- L-Glass : 775 Mnominal
Junction resistance : < 5
Liquid outlet : non-flow single junction
Temperature element : Pt1000 to IEC 751
Asymmetry potential : 8 ± 15 mV
Slope : > 96 % (of theoretical value)
Sensor length : 120 mm and 225 mm
Note: The temperature sensor included in the SC25V is designed for process
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 : t90 < 90 sec. (for 10 °C step)
Stabilization time pH : < 2 min. (for 0.02 pH deviation during 10 sec.)
2.5 Operating range
pH : 0 to 14
Temperature
- G-Glass : -10 to +80 ºC (14 to 176 ºF)
- L-Glass : +15 to +130 ºC (59 to 266 ºF)
Pressure : 0 to 10 bar (0 to 145 psi)*
Conductivity : > 1
* Damaging the screw thread might influence the max process pressure.
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: The upper process temperature for the intrinsically safe version is limited by the
ambient temperature (Tamb.) defined for each temperature class (T3,T4,T5 and T6)
IM 12B06J01-40EN-P
2.6Shipping details : SC25V-…..-120 SC25V-…..-225
Package size (LxWxH) : 300x100x75 mm 435 x 60 x 60 mm
: 11.8x3.9x3.0 inch 17.2x2.4x2.4 inch
Package weight (max.) : 0.26 kg (0.57 lbs) 0.28 kg (0.62 lbs)
2.7Environmental conditions
Storage temperature : -10 to +50 ºC (14 to 122 ºF)
Ingress Protection : IP67 (conform IEC 60529)
Sterilizable : Up to 135 °C (275 °F)
CIP cleaning possible : YES
2.8Mechanical specifications
Process connection : PG13.5
IM 12B06J01-40EN-P
2.9Regulatory standards
IECEx Applying standards : IEC 60079-0
: IEC 60079-11
Certificate no.* : IECEx DEK 11.0064X, issue 1
Electrical data : See Note 1
Specific conditions : See Note 2
of use
CE - ATEX : Directive 2014/34/EU
Applying standards : EN IEC 60079-0
EN 60079-11
Certificate no.* : DEKRA 11ATEX0014 X, issue 2
Electrical data : See Note 1
Specific conditions : See Note 2
of use
- ROHSII : Directive 2011/65/EU
Applying sensors, detectors and (ion sensitive)
electrodes
- PED : Directive 2014/68/EU
Applying article 4.3 (Sound Engineering Practice)
Damaging the screw thread of the sensor might influence the maximum
process pressure
- LVD : Directive 2014/35/EU
Applying standards : NEN-EN-IEC 61010-1
ANSI/ISA 61010-1
CAN/CSA-C22.2 No. 61010-1
Note 1: Models without ID-chip (Suffix SC25V-:
I/O signals are from/to an associated intrinsically safe certified pH/ORP
transmitter (e.g. Yokogawa transmitter Model FLX21/FLX202 series or
Yokogawa transmitter Model PH202S series).
Models with ID-chip (Suffix SC25V-:
I/O signals are from/to an associated intrinsically safe certified pH/ORP
transmitter, Yokogawa Smart Adapter Model SA11-P1.
Sensor input circuits:
In type of protection intrinsic safety Ex ia IIC, only for connection 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 = 0.4 nF (Suffix SC25V-:
Ci = 0 nF (Suffix SC25V--chip)
When the sensor has been connected to non intrinsically safe equipment which
exceeds the restrictions regarding the sensor input circuits, the sensor is not
suitable anymore for intrinsically safe use.
IM 12B06J01-40EN-P
Note 2: Ambient temperature:
-40 °C to +40 °C for temperature class T6,
-40 °C to +55 °C for temperature class T4 and T5,
-40 °C to +105 °C for temperature class T3.
Electrostatic charges of the sensor enclosure parts and label shall be avoided,
especially in the case that the process medium is non-conductive. Use a damp
cloth for cleaning the equipment. From the safety point of view the circuits shall
be assumed to be connected to earth.
* Certification is subject to change, due to new regulations or changes in the product itself.
When a certificate is updated, a new revision under the same certificate number is created
with a new issue number.
- ATEX:
DEKRA11ATEX0014 X, issue 1 (effective from 03-2011)
DEKRA11ATEX0014 X, issue 2 (effective from 02-2021)
- IECEx:
IECEx DEK 11.0064X, issue 0 (effective from 07-2011)
IECEx DEK 11.0064X, issue 1 (effective from 02-2021)
Label information:
The Model Suffix information as well as manufacturer information is written on a product
label on or in the product. Example of a product label inside SC25V see figure 1.
Figure 1: Sensor product label
For other certification related information, the product label is not big enough to show all
details. Therefore, the intrinsic certification information for ATEX, IECEx, FM-United States
and FM-Canada an additional label is provided.
This label needs to be attached to the sensor cable. Label content of additional label, see
figure 2 and 3 side A and B.
Figure 2: side A, ATEX/IECEx Figure 3: side B, FM-US and FM-CAN
SC25V-XXXXX-XXX
N3XA12345
IM 12B06J01-40EN-P
FM-United States
Applying standards : FM Class 3600
FM Class 3610
FM Class 3810
ANSI/ISA 60079-0
ANSI/ISA 60079-11
Certificate no.* : FM20US0123X
Control Drawing: D&E 2020-023-A50
Electrical data : See Note 3
Specific conditions : See Control Drawing D&E 2020-023-A50
of use
Note 3: Intrinsically safe, entity, for Class I, Division 1, Groups A, B, C and D;
Class I, Zone 0, AEx ia IIC, Ga (entity) for hazardous (classified) locations when
installed per control drawing D&E 2020-023-A50.
Sensor input parameters:
Ui= 18V; Ii= 170 mA; Pi= 0.4 W;
Li= 0 mH
Ci= 0.4 nF (Suffix SC25V-with ID chip):
Ci= 0 nF (Suffix SC25V-without ID-chip)
Ambient temperature:
-40 °C to +40 °C for temperature class T6,
-40 °C to +55 °C for temperature class T4 and T5,
-40 °C to +105 °C for temperature class T3.
When the sensor has been connected to non intrinsically safe equipment which
exceeds the restrictions regarding the sensor input circuits, the sensor is not
suitable anymore for intrinsically safe use.
* Certification is subject to change, due to new regulations or changes in the product itself.
When a certificate is updated, a new revision under the same certificate number is created
with a new date.
- FM-United States:
FM20US0123X (effective from 03-2021)
IM 12B06J01-40EN-P
Control drawing: D&E 2020-023-A50 (part 1)
IM 12B06J01-40EN-P
Remarks:
1 No revision to this drawing without prior approval of FM.
2 Installation must be in accordance with the National Electrical Code (ANSI/NFPA 70),
ANSI/ISA-RP12.06.01, and relevant local codes.
3 The sensor shall be installed to a certified intrinsically safe HOST with the following
maximum values: Uo= 18 V, Io = 170 mA, Po = 400mW.
4 The sensor does not provide isolation from earth. Installers shall take necessary
measures to prevent the possibility of sparking resulting from differing earth
potentials between the sensors and interconnecting equipment. This can be realized
for example by selecting interconnecting equipment which provides input-to-output
and input-to-earth isolation up to 500 V rms.
5 Sensor Model code:
Table 3:
Model
Suffix Codes
Option Codes
SC25V
-abcde-fgh
/j
abcde
Type + Region:
AGP25 Glass body/Straight Thread/Bulb
shaped G-glass/without ID-chip/IS
for ATEX/IECEx, FM-US, FM-CAN
ALP25 Glass body/Straight Thread/Bulb
shaped L-glass/without ID-chip/IS
for ATEX/IECEx, FM-US, FM-CAN
fgh
Sensor length:
Up to three alphanumeric characters (0 to 9)
j
Option code:
Up to ten alphanumeric characters
(A to Z, 0 to 9 or hyphen)
6 WARNING－POTENTIONAL ELECTROSTATIC CHARGING HAZARD SEE
INSTRUCTIONS
pH sensors containing accessible plastic parts and/or external conductive parts, must
be installed and used in such a way, that dangers of ignition due to hazardous
electrostatic charges cannot occur, especially in the case that the process medium is
non-conductive.
IM 12B06J01-40EN-P
Control drawing: D&E 2020-023-A50 (part 2)
IM 12B06J01-40EN-P
Remarks:
1 No revision to this drawing without prior approval of FM.
2 Installation must be in accordance with the National Electrical Code (ANSI/NFPA 70),
ANSI/ISA-RP12.06.01, and relevant local codes.
3 The sensor shall be installed to a certified intrinsically safe Smart Adapter, model
SA11-P1 with the following maximum values: Uo= 6.6 V, Io = 100 mA, Po = 165 mW.
4 The installers shall take necessary measures to prevent the possibility of sparking
resulting from differing earth potentials between the sensors and interconnecting
equipment. The sensor itself does not provide 500 V rms isolation from earth, the
interconnecting equipment Model SA11-P1 Smart Adapter however provide this
required isolation.
5 Sensor Model code:
Table 4:
Model
Suffix Codes
Option Codes
SC25V
-abcde-fgh
/j
abcde
Type + Region:
BGP25 Glass body/Straight Thread/Bulb
shaped G-glass/with ID-chip/IS for
ATEX/IECEx, FM-US, FM-CAN
BLP25 Glass body/Straight Thread/Bulb
shaped L-glass/with ID-chip/IS for
ATEX/IECEx, FM-US, FM-CAN
fgh
Sensor length:
Up to three alphanumeric characters (0 to 9)
j
Option code:
Up to ten alphanumeric characters
(A to Z, 0 to 9 or hyphen)
6 WARNING－POTENTIONAL ELECTROSTATIC CHARGING HAZARD SEE
INSTRUCTIONS
pH sensors containing accessible plastic parts and/or external conductive parts, must
be installed and used in such a way, that dangers of ignition due to hazardous
electrostatic charges cannot occur, especially in the case that the process medium is
non-conductive.
IM 12B06J01-40EN-P
FM-Canada
Applying standards : CAN/CSA-C22.2 No. 60079-0
CAN/CSA-C22.2 No. 60079-11
Certificate no.* : FM20CA0062X
Control Drawing: D&E 2020-023-A51
Electrical data : See Note 4.
Specific conditions : See Control Drawing D&E 2020-023-A51.
of use
Note 4: Intrinsically safe, entity, for Class I, Division 1, Groups A, B, C and D;
Class I, Zone 0, Ex ia IIC, Ga (entity) for hazardous (classified) locations when
installed per control drawing D&E 2020-023-A51.
Sensor input parameters:
Ui= 18 V; Ii= 170 mA; Pi= 0.4 W; Li= 0 mH
Ci= 0.4 nF (Suffix SC25V-:
Ci= 0 nF (Suffix SC25V--chip)
Ambient temperature:
-40 °C to +40 °C for temperature class T6,
-40 °C to +55 °C for temperature class T4 and T5,
-40 °C to +105 °C for temperature class T3.
When the sensor has been connected to non intrinsically safe equipment which
exceeds the restrictions regarding the sensor input circuits, the sensor is not
suitable anymore for intrinsically safe use.
* Certification is subject to change, due to new regulations or changes in the product itself.
When a certificate is updated, a new revision under the same certificate number is created
with a new date.
- FM-Canada:
FM20CA0062X (effective from 03-2021)
IM 12B06J01-40EN-P
Control drawing: D&E 2020-023-A51 (part 1)
IM 12B06J01-40EN-P
Remarks:
1 No revision to this drawing without prior approval of FM.
2 Installation must be in accordance with the Canadian Electrical Code (CEC)
CSA22.1, and relevant local codes.
3 The sensor shall be installed to a certified intrinsically safe HOST with the following
maximum values: Uo= 18 V, Io = 170 mA, Po = 400mW.
4 The sensor does not provide isolation from earth. Installers shall take necessary
measures to prevent the possibility of sparking resulting from differing earth
potentials between the sensors and interconnecting equipment. This can be realized
for example by selecting interconnecting equipment which provides input-to-output
and input-to-earth isolation up to 500 V rms.
5 Sensor Model code:
Table 5:
Model
Suffix Codes
Option Codes
SC25V
-abcde-fgh
/j
abcde
Type + Region:
AGP25 Glass body/Straight Thread/Bulb
shaped G-glass/without ID-chip/IS
for ATEX/IECEx, FM-US, FM-CAN
ALP25 Glass body/Straight Thread/Bulb
shaped L-glass/without ID-chip/IS
for ATEX/IECEx, FM-US, FM-CAN
fgh
Sensor length:
Up to three alphanumeric characters (0 to 9)
j
Option code:
Up to ten alphanumeric characters
(A to Z, 0 to 9 or hyphen)
6 WARNING－POTENTIONAL ELECTROSTATIC CHARGING HAZARD SEE
INSTRUCTIONS
pH sensors containing accessible plastic parts and/or external conductive parts, must
be installed and used in such a way, that dangers of ignition due to hazardous
electrostatic charges cannot occur, especially in the case that the process medium is
non-conductive.
AVERTISSEMENT
DANGER POTENTIEL DE CHARGES ÉLECTROSTATIQUES VOIR LES
INSTRUCTIONS
Les sondes de pH contenant des pièces en plastique accessibles et / ou des pièces
conductrices externes doivent être installées et utilisées de manière à éviter tout
risque d'inflammation dû à des charges électrostatiques dangereuses, en particulier
dans le cas où le fluide de procédé n'est pas conducteur.
IM 12B06J01-40EN-P
Control drawing: D&E 2020-023-A51 (part 2)
IM 12B06J01-40EN-P
Remarks:
1. No revision to this drawing without prior approval of FM.
2. Installation must be in accordance with the Canadian Electrical Code (CEC)
CSA22.1, and relevant local codes.
3. The sensor shall be installed to a certified intrinsically safe Smart Adapter, model
SA11-P1 with the following maximum values: Uo= 6.6 V, Io = 100 mA, Po = 165 mW.
4. The installers shall take necessary measures to prevent the possibility of sparking
resulting from differing earth potentials between the sensors and interconnecting
equipment. The sensor itself does not provide 500 V rms isolation from earth, the
interconnecting equipment Model SA11-P1 Smart Adapter however provide this
required isolation.
5. Sensor Model code:
Table 6:
Model
Suffix Codes
Option Codes
SC25V
-abcde-fgh
/j
abcde
Type + Region:
BGP25 Glass body/Straight Thread/Bulb
shaped G-glass/with ID-chip/IS for
ATEX/IECEx, FM-US, FM-CAN
BLP25 Glass body/Straight Thread/Bulb
shaped L-glass/with ID-chip/IS for
ATEX/IECEx, FM-US, FM-CAN
fgh
Sensor length:
Up to three alphanumeric characters (0 to 9)
j
Option code:
Up to ten alphanumeric characters
(A to Z, 0 to 9 or hyphen)
WARNING－POTENTIONAL ELECTROSTATIC CHARGING HAZARD SEE
INSTRUCTIONS
pH sensors containing accessible plastic parts and/or external conductive parts, must be
installed and used in such a way, that dangers of ignition due to hazardous electrostatic
charges cannot occur, especially in the case that the process medium is non-conductive.
DANGER POTENTIEL DE CHARGES ÉLECTROSTATIQUES VOIR LES
INSTRUCTIONS
Les sondes de pH contenant des pièces en plastique accessibles et / ou des pièces
conductrices externes doivent être installées et utilisées de manière à éviter tout risque
d'inflammation dû à des charges électrostatiques dangereuses, en particulier dans le cas
où le fluide de procédé n'est pas conducteur.
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