Instruction
Y
Manual
Model SC4A
19mm Conductivity Sensors
OKOGAWA
IM 12D7J4-E-E
7th edition
TABLE OF CONTENTS
1. GENERAL ...................................................................................................................... 1
1-1. Type number ......................................................................................................... 1
1-2. General specifications SC4A-AD .......................................................................... 1
1-3. General specifications SC4A-SA/SB/SC ............................................................... 2
1-4. General specifications SC4A-PR .......................................................................... 3
1-5. Labelling ................................................................................................................ 3
2. INSTALLATION ............................................................................................................. 6
2-1. connection ............................................................................................................. 6
2-2. Mounting ............................................................................................................... 6
2-3. Safety warning ....................................................................................................... 6
3. OPERATION AND MAINTENANCE ............................................................................. 7
3-1. Checking the cell ................................................................................................... 7
3-2. Calibration of the cell ............................................................................................. 7
3-3. Cleaning of the cell ................................................................................................ 7
3-4. Spare parts list ...................................................................................................... 8
IM 12D7J4-E-E
ºC
1. GENERAL
1-1. Type number
The type number of the conductivity cell, shown on the cable, gives coded information on
the cell constant, the materials of construction etc.
1-2.General specifications SC4A-AD
Materials Wetted Parts
3 ro 2 edarg muinatiT ro 613 ISIA leets sselniatS : sedortcele & ydoB
O-rings : Viton
613 ISIA leets sselniatS ro FDVP : retpada gnitnuoM
Insulation : PEEK (Poly Ether Ether Ketone)
Operating Specifications (Sensor)
Measuring system : 2-electrode (4-wire)
Maximum pressure : 10 Bar (142 PSIG)
Maximum temperature : 110 °C (230 °F)
egnahc pets a fo %09 rof etunim 1 < : esnopser erutarepmeT
Sterilize : At 135°C (275 °F)
Shipping details
Package size : wxhxd 220 x 220 x 90 mm
wxhxd 215 x 150 x 55 mm
package weight : Approx. 1.6 kg. 3.5 Ib
Model Suffix Option Description
Code code
SC4A
-T Titanium
19 mm conductivity sensor
152 (5.98")
-S Stainless steel
Fitting-type -AD For adapter mounting
Sensor-length -09 9 cm
-15 15 cm
Cellconstant -002 0.02/cm
-010 0.1/cm
Cable length -03 3 meter
-05 5 meter
-10 10 meter
-AD -15cm
-15 15 meter
-20 20 meter
-T1 Pt1000
AD only /PS
/PF
3
/4
” stainless steel adapter
3
/4
” PVDF adapter
gnittifwolF SS FF/
(option /PS required)
Certificates /Q Quality Inspection Certificate
90 (3.55)
Note: 3.1 Material certificate according to EN 10024 is standard
delivered with this sensor.
BAR
12
10
8
6
4
2
0 10 20 30 40 50 60 70 80 100 120 140 160
Operating Specifications (Adapters)
PVDF
SS
Ø19,1
(0.75)
-AD -09cm
IM 12D7J4-E-E
1
Ø 19,1 (0.75")
2
(1.50 x 0.20)
1-3 General specifications SC4A-SA/SB/SC
Materials Wetted Parts
Body & electrodes : Stainless steel AISI 316 (1.4435), Ro < 0.5
O-rings : EPDM, FDA migration tested
Mounting adapter : Stainless steel AISI 316 Triclamp acc. to ISO2852-1993
Insulation : PEEK (Poly Ether Ether Ketone), FDA migration tested
Operating Specifications (Sensor)
Measuring system : 2-electrode (4-wire)
Maximum pressure : 10 Bar (142 PSIG)
Maximum temperature : 110 °C (230 °F)
a fo %09 rof etunim 1 < : esnopser erutarepmeT
step change
Sterilize : At 135°C (275 °F)
Operating Specifications
Stainless Steel
Maximum pressure : 10 Bar (142 psig)
Maximum temperature : 135 °C (275 °F)
Shipping details
Package size : wxhxd 220 x 220 x 90 mm
wxhxd 215 x 150 x 55 mm
package weight : Approx. 1.6 kg. 3.5 Ib
95 (3.74")
Ø 25
(1.00")
Ø 38 x 5
25
Model Suffix Option Description
Code code
SC4A 19 mm conductivity sensor
-E EPDM FDA
Fitting-type -SA 25mm port
-SB 1-1
1/2
” tri-clamp
-SC 2” tri-clamp
Always -NN fixed length
Cellconstant -002 0.02/cm
-010 0.1/cm
Cable length -03 3 meter
-05 5 meter
-10 10 meter
-15 15 meter
-20 20 meter
-T1 Pt1000
Certificates /Q Quality Inspection Certificate
Note: dradnats si 42001 NE ot gnidrocca etacifitrec lairetaM 1.3
delivered with this sensor.
IM 12D7J4-E-E
70 (2.75")
Ø19
(0.75")
Ø50,4
(1.98")
-SA
1 - 1.5 " tri-clamp
80 (3.15")
2 " tri-clamp
Ø63,9
(2.52")
Ø25
(1.00")
-SC-SB
1-4 General specifications SC4A-PR
Materials
Wetted Parts
613 ISIA leets sselniatS : sedortcele & ydoB
or Titanium grade 2 or 3
O-rings : Viton
gnittif elbatcarteR : retpada gnitnuoM
Insulation : PEEK (Poly Ether Ether Ketone)
Operating Specifications (Sensor)
Measuring system : 2-electrode (4-wire)
Maximum pressure : 10 Bar (142 PSIG)
Maximum temperature : 110 °C (230 °F)
a fo %09 rof etunim 1 < : esnopser erutarepmeT
step change
Sterilize : At 135°C (275 °F)
Shipping details
Package size : wxhxd 220 x 220 x 90 mm
wxhxd 215 x 150 x 55 mm
package weight : Approx. 1.6 kg. 3.5 Ib
Model Suffix Option Description
Code code
SC4A 19 mm conductivity sensor
-T Titanium
-S Stainless steel
Fitting-type -PR For retractable mounting
Always -NN fixed length
Cellconstant -002 0.02/cm
-010 0.1/cm
Cable length -03 3 meter
-05 5 meter
-10 10 meter
-15 15 meter
-20 20 meter
-T1 Pt1000
Certificates /Q Quality Inspection Certificate
M19x1.5
Ø19
(0.75")
48 (1.89")
-PR
3
Note: dradnats si 42001 NE ot gnidrocca etacifitrec lairetaM 1.3
delivered with this sensor.
1-5. Labelling
In addition to the type number, information is given regarding:
queries.
.noitarbilac tnatsnoc llec laudividnI -
ecnanetniam ro ecivres yna ni detouq eb dluohs rebmun sihT .)7P .g.e( rebmun hctab ehT -
IM 12D7J4-E-E
4
12D7J4-19
OPTIONS
OPTIONS
ca 49 (1.95")
/PS
3/4 NPT
ca 49 (1.95")
/PF
Figure 1-1. Adapters for SC4A-AD...
units in mm (inch)
3/4” NPT
1/4” NPT
Ø30
3/4 NPT
Figure 1-2. Mounted sensor with the
option /PS and /PF
1/4” NPT
30 (1.18”)
Figure 1-3. Flow fitting option /FF
K1598 AC (incl. 3.1 certificate)
IM 12D7J4-E-E
100 (3.94”)
51 (2.00")
55 (2.16")
Figure 1-4. Welding socket
for SC4A-SA...
/SB2
/SC1
/SB1
12,7 (0.5")
Ø25,4(1.0")
12,7 (0.5")
Ø38,1(1.5")
12,7 (0.5")
Ø50,8(2.0")
Tri-clamps for SC4A -SB...
Tri-clamp for SC4A-SC...
Figure 1-5. Tri-clamp dimensions
5
Figure 1-6. Mounted Sensor SC4A -SB / - SC
IM 12D7J4-E-E
6
2. INSTALLATION
2-1. Connection
The cable is six wire multicore and covered
with a thermoplastic TPE. The wires are also
covered with thermoplastic TPE individually
and coloured. The cable connections
are supplied with 2 mm terminations for
connection to the transmitter, or connection
box: these pins quarantee a correct and
simple connection to the terminals.
11 Temperature
12 Temperature
13 Outer electrode
14 Outer electrode
15 Inner electrode
16 inner electrode
Figure 2-0. Sensor Wiring
At the instrument end the cable termination
tags are numbered to correspond with their
respective terminals of the transmitters.
NOTE:
If the cable is used with a connection box,
type BA10 then special purpose cable, type
WF10 must be used between connection
box and transmitter connected to the same
terminals as the cell cable. A maximum of
50 metres total cable length is permissable.
2-2. Mounting
The mounting is by a compression gland or
sanitary adapter, giving a simple effective
method of direct insertion in process
pipework. For mounting the retractable
sensor refer to the instruction manual of the
PR4A retractable holder. Before mounting
a cell in a process plant environment the
following points should be considered:
ssecorp fo wolf ,evitatneserper ,doog a liquid through the cell should exist. Hence,
the cell must
be mounted in the process
IM 12D7J4-E-E
in such a way that the flow through it
represents the true composition of the
liquid. The flow through the cell should be
uninterrupted and the cell should not be
mounted at a “dead” angle.
ssecorp eht ni desremmi eb tsum llec a liquid to a level above the outlet to ensure
an uninterrupted liquid path between the
electrodes.
to allow easy removal for
maintenance. It is recommended that
the cell is mounted in a ‘by-pass’ directly
behind a drain valve.
2-3. Safety warning
For SC4A..AD to avoid the sensor
shooting out, never install in application
where pressure can exceed specified
maximum. Never loosen mounting nut while
system is pressurised.
2-4. Commisioning
The sensor cable is marked with a label
specifying complete MS mode, Serialnumber
and calibrated cell constant*. This cell
constant must be entered in the EXA
transmitter to achive an accurate
measurement.
* Always specify complete MS code
and serialnumber in communication with
Yokogawa organisation with regards to
performance issues or warranty matters.
C
A
E
B
screen
D
overall
shield
Figure 2-1. WF10 Cable
yaw a hcus ni detnuom eb dluohs llec eht -
3. OPERATION AND MAINTENANCE
7
3-1. Checking the cell
If a fault occurs, first check the cell for
visible damage. If damage is not apparent, check the cell resistances measuring
between the cable connections.
a. 11 and 12 (or connector pins 1 and 2)
b. 11 and 13 (or connector pins 1 and 3)
c. 12 and 13 (or connector pins 2 and 3)
d. 12 and 15 (or connector pins 4 and 5)
e. 15 and 16 (or connector pins 5 and 6)
f. 13 and 14 (or connector pins 3 and 4)
g. 13 and 15 (or connector pins 3 and 5)
Celltype a, b, c, d, g e, f
SC4A Pt1000 value > 100MΩ < 2Ω
If the cell has become fouled resistance will
be developed across the electrodes. These
resistances can be measured by making
contact directly with the electrode and the
relevant pin of the connector.
3-2. Calibration of the cell
The cell constant is determined under
laboratory conditions. It is possible that
slight variations in the cell constant may
occur dependant on the installation.
This possible error can be corrected by
recalibrating with a solution of known
conductivity value. The procedure is
descibed in ASTM D1125 or OIML
recommendation 56. Sensors with
long
cables may exhibit an offset in the
temperature readings. This can be
adjusted in the transmitter or converter.
A calibrated thermometer should be used
as reference measurement.
3-3. Cleaning of the cell
If the cell becomes fouled an insulating
layer may be formed on the electrodes and
consequently, an apparent increase in cell
constant may accur, giving a measuring
error. This error is:
2 • x 100 %
(Rv)
(Rcel)
Where:
Rv = the resistance of the fouling layer
Rcel = the cell resistance.
Cleaning methods
htiw retaw toh snoitacilppa lamron roF .1
domestic washing-up liquid added will
be effective.
%01...5 a .cte ,sedixordyh ,emil roF .2
solution of hydrochloric acid is
recommended.
easily removed with acetone.
a esu ,sdluom ro airetcab eagla roF .4
chlorinated solution (domestic bleach*).
dna dica cirolhcordyh esu reveN *
domestic bleach simultaneously.
The liberation of the very poisonous
gas Chlorine will result.
eb nac ).cte ,staf ,slio( sgniluof cinagrO .3
NOTES:
The specific conductivity value of the
solution of known value must be near the
value of the liquid to be measured. Specific
conductivity is highly temperature
dependent, therefore in the above
calibration procedure the temperature of
the cell and the liquid should be allowed
to equalise and should be accurately
measured with a calibrated thermometer.
IM 12D7J4-E-E
8
3-4. SPARE PARTS AND ACESSOIRES
3-4-1- Spare parts and acessories for SC4A-S- AD and SC4A-T-AD
K1542DF Compression fitting in Stainless Steel ( /PS)
K1500DY Ferrule set for K1542DF
K1542CW Compression fitting in PVDF (/PF)
K1598AC Flowfitting with 3.1 material certificate
3.4.2. Spare parts and acessories for SC4A-E-SA
K1542FA Straight welding socket and mounting nut Stainless Steel
K1500BJ O-rings in EPDM (5), FDA migration tested
3.4.3. Spare parts and acessories for SC4A-E-SB
K1500HN Sealing gasket in EPDM for K1542FC (3), FDA migration tested
(welding socket, sealing gasket and clamp ring) (/SB1)
(welding socket, sealing gasket and clamp ring) (/SB2)
K1500BN Sealing gasket in EPDM for K1542FF (3), FDA migration tested
3.4.3. Spare parts and acessories for SC4A-E-SC
(welding socket, sealing gasket and clamp ring) (/SC1)
K1500BP Sealing gasket in EPDM for K1542FE (3), FDA
3.4.4. Spare parts and acessories for SC4A-T-PR and SC4A-S-PR
K1500BE O-rings in Viton (10)
K1500ED O-rings in Kalrez (2)
pmalcirt ”1 rof tes gnitnuom pmalC-irT CF2451K
pmalcirt ”5,1 rof tes gnitnuom pmalC-irT FF2451K
pmalcirt ”2 rof tes gnitnuom pmalC-irT EF2451K
migration tested
IM 12D7J4-E-E
9
IM 12D7J4-E-E
YOKOGAWA
YOKOGAWA EUROPE B.V.
Euroweg 2
3825 HD AMERSFOORT
The Netherlands
Tel. +31-88-4641 000
Fax +31-88-4641 111
www.yokogawa.com/eu
YOKOGAWA CORPORATION OF AMERICA
2 Dart Road
Newnan GA 30265
United States
Tel. (1)-770-253-7000
Fax (1)-770-251-2088
www.yokogawa.com/us
YOKOGAWA ELECTRIC ASIA Pte. Ltd.
5 Bedok South Road
Singapore 469270
Singapore
Tel. (65)-241-9933
Fax (65)-241-2606
www.yokogawa.com.sg
YOKOGAWA HEADQUARTERS
9-32, Nakacho 2-chome,
Musashinoshi
Tokyo 180
Japan
Tel. (81)-422-52-5535
Fax (81)-422-55-1202
www.yokogawa.com
Yokogawa has an
extensive sales and
distribution network.
Please refer to the
European website
(www.yokogawa.com/eu)
to contact your nearest
representative.
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
Euroweg 2
3825 HD AMERSFOORT
The Netherlands
www.yokogawa.com/eu
IM 12D7J4-E-E Copyright ©
Subject to change without notice
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
Yokogawa has an extensive sales and
distribution network.
Please refer to the European website
(www.yokogawa.com/eu) to contact your
nearest representative.
Printed in The Netherlands
07-901 (A) I
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