YOKOGAWA SC4A User manual

IM 12D07J04-01EN-P
1st edition
Instruction
Manual
Model SC4A
Conductivity Sensors
19mm 2-electrode

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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 method............................................................................................ 8
2.2 Measuring element........................................................................................... 8
2.3 Wetted parts..................................................................................................... 8
2.4 Functional specifications (at 25 °C) .................................................................. 8
2.5 Dynamic specifications..................................................................................... 8
2.6 Operating range ............................................................................................... 9
2.7 Shipping details.............................................................................................. 10
2.8 Environmental conditions................................................................................ 10
2.9 Mechanical specifications............................................................................... 10
2.10 Regulatory standards ................................................................................... 11
3. INSTALLATION OF SC4A sensors........................................................................... 23
3.1 Typical installation SC4A-*-AD with standard options...................................... 23
3.2 Typical installation SC4A-E-SA (SB, SC) with standard options / spare parts.. 24
3.3 Typical installation SC4A-*-PR ........................................................................ 24
4. DIMENSIONS............................................................................................................. 25
5. WIRING...................................................................................................................... 26
5.1 Connecting conductivity sensor to analog host system.................................... 26
5.2 Connecting conductivity sensor to the digital SENCOM smart adapter SA11... 27
6. GENERAL CALIBRATION & MAINTENANCE PROCEDURE................................... 28
6.1 Calibration of the sensor.................................................................................. 28
6.2 Periodic maintenance of the sensor................................................................. 28
7. MODEL CODES......................................................................................................... 29
8. SPARE PARTS.......................................................................................................... 30
9. CHEMICAL COMPATIBILITY CHART....................................................................... 31

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1. PREFACE
1.1 Introduction
Model SC4A sensors, available in a
Stainless Steel or Titanium version with
fixed cable or Variopin connector, in
combination with WU10/WE10-cable are
intended for the low conductivity
applications. These sensors are designed
in a convenient compact style and can be
inserted directly in process pipework using
fittings, adapters or compression gland.
Some sensors have wetted materials
approved by FDA. This makes them
ideally suited for the monitoring of pure
water systems used in the preparation of
injectable solutions. For this kind of
application, sanitary clamp mountings are
most often used.
All sensors have a pre-calibrated cell
constant and a built-in temperature
element for automatic temperature
compensation. Sensors with the Variopin
connector are equipped with an ID-chip in
which calibration information is stored for
easy setup when connected to a
SENCOM Smart Adapter model SA11-C1.
The model with Variopin connector can
also be connected to an analog
transmitter.
For metal sensors, a 3.1 material
certificate is included. The sensors are
certified for hazardous area when
connected to a certified intrinsically safe
Yokogawa analyzer (model SC202S,
FLXA-series, SA11 Smart Adapter) or
when connected to a certified intrinsically
safe circuit with defined output
parameters.
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 sufficient.
For that reason, a separate label is
delivered with intrinsically safety
compliance information (ATEX, IECEx,
FM-United States and FM-Canada). This
label needs to be connected onto the
sensor cable close to the sensor.

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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.
1.4 Serial number
The Serial number is defined by nine (9)
alphanumeric characters:
X1X2Production location
X3X4Year/Month code
X5X6X7X8X9Tracking number
Example: N3X205325
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

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2. GENERAL SPECIFICATIONS
2.1 Measuring method : 2-electrode
2.2Measuring element : Pt1000 temperature sensor
2.3Wetted parts
Sensor Body and electrodes : SC4A-T-AD : Titanium grade 2 or 3
SC4A-S-AD : Stainless Steel AISI 316L
SC4A-E-SA (SB, SC) : Stainless Steel AISI 316L
SC4A-T-PR : Titanium grade 2 or 3
SC4A-S-PR : Stainless Steel AISI 316L
O-ring : SC4A-*-AD : Viton
SC4A-E-SA (SB, SC) : EPDM FDA approved
SC4A-*-PR : Viton
Insulation : All models : PEEK 450G, FDA migration
tested
Connector Variopin : Contacts : gold plated
Material : Nickel-plated brass
Insulation : PEEK, UL94-V0
Wetted parts adapters/fitting : /PS, /FF for SC4A-*-AD : Stainless Steel AISI 316L
/PF for SC4A-*-AD : PVDF
/SA1(2), /SB1(2), /SC1 for
SC4A-E-SA (SB, SC) : Stainless Steel AISI 316L
Cable1: Conductors : tinned copper 0.6 mm2
Outside shield : braid, tinned copper, 85%
coverage
Insulator : Polyester for conductor*
* for colors see Section 5.1, TPE-O for outer jacket, color black
Note 1 :Cable is not considered as wetted part
2.4 Functional specifications (at 25 °C)
Temperature element2: Pt1000 to IEC 751
Nominal Cell Constant : 0.02 cm-1 or 0.01 cm-1
Note 2 : The temperature sensor included in the sensor is designed for process
compensation and for indication. It is NOT designed for process temperature
control.
2.5 Dynamic specifications
Response time temperature (t90) : < 1 min.

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2.6 Operating range
Conductivity range* at actual process temperature : 1 μS x C.C. –200 mS x C.C.
See Fig. 1
* measurement range dependent on input range analyzer.
Fig. 1 Measuring range of conductivity sensors section
Temperature @ 100 KPa (1 Bar, 14.5 PSI) : 0 °C ... 125 °C (32 °F to 257 °F)
For VarioPin type sensors
0 °C ... 100 °C (32 °F to 212 °F)
For fixed cable type sensors
Remark:
For all types 135°C (275 °F) max. for a short period of time during sterilization.
In combination with a fitting or option, the specification of the most critical part is
leading.
Pressure @ 25 °C : Stainless Steel & Titanium type
Over pressure 0 to 10 barg (7 to 142 PSIG)*
Under pressure 0 to 0.5 barng (0 to 7 PSIG)*
* Unit definition: barg = bar gauge, over pressure against atmosphere.
barng = under pressure against atmosphere
Process Pressure in combination with PVDF fitting: See Fig. 2

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Fig. 2 Process pressure in combination with fitting
2.7Shipping details
Package size (LxWxH) 220 x 220 x 90 mm (8.7 x 8.7 x 3.6 inch)
Fixed cable version
300 x 100 x 75 mm (11.8 x 3.9 x 3.0 inch)
VarioPin type version
Package weight (max.) SC4A-***
connection type: -03/VS -05 -10 -15 -20
0.63 0.78 1.13 1.48 1.83 kg
1.4 1.7 2.5 3.0 4.0 lbs
2.8Environmental conditions
Storage temperature : -30 ºC to +50 ºC (-22 ºF to +122 ºF)
Ingress Protection fixed cable type : IP65 (conform IEC 60529)
Ingress Protection VarioPin type : IP67 (conform IEC 60529)
2.9Mechanical specifications
Surface roughness SC4A-*-AD : max. 0.8 μm
SC4A-E-SA/SB/SC : max. 0.5 μm
SC4A-*-PR : max. 0.8 μm