YOKOGAWA SX42 User manual

IM 12D07J03-01EN-P
1st edition
Instruction
Manual
Model SX42
2-electrode Conductivity Sensors
For High temperature/pressure

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IM 12D07J03-01EN-P
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Contents
1. PREFACE .................................................................................................................... 6
1.1 Introduction ....................................................................................................... 6
1.2 Unpacking and Checking................................................................................... 6
1.3 Warranty and Service........................................................................................ 6
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 Non-Wetted parts............................................................................................. 8
2.5 Functional specifications (at 25 °C) .................................................................. 8
2.6 Dynamic specifications..................................................................................... 8
2.7 Operating range ............................................................................................... 9
2.8 Shipping details.............................................................................................. 10
2.9 Environmental conditions................................................................................ 11
2.10 Regulatory standards ................................................................................... 12
3. INSTALLATION OF SX42 sensors ........................................................................... 24
3.1 Typical installation of SX42.............................................................................. 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... 28
6. GENERAL CALIBRATION & MAINTENANCE PROCEDURE................................... 29
6.1 Calibration of the sensor.................................................................................. 29
6.2 Periodic maintenance of the sensor................................................................. 29
7. MODEL CODES......................................................................................................... 30
8. SPARE PARTS.......................................................................................................... 30
9. CHEMICAL COMPATIBILITY CHART....................................................................... 31

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1. PREFACE
1.1 Introduction
These high temperature conductivity
sensors have a stainless-steel body and a
ceramic insulation, especially designed to
withstand high temperatures (up to
250°C) and pressures (up to 40 bar).
A special treatment of the electrodes
ensures optimal resistance against
polarization.
The flanged model has an integral
connection box, the threaded models are
provided with a Amphenol connector to fit
the Yokogawa WU40 cable, or with a
Variopin connector to fit with Yokogawa
WU10/WE10-cable.
The sensor and associated fitting program
is designed to meet the most common
installation requirements in terms of
material compatibility, process
connections and flow dynamics. The
various installation possibilities are
described and illustrated in this Instruction
Manual.
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.
For metal sensors a 3.1 material
certificate is included. The sensor is
certified for hazardous area when
connected to a certified intrinsically safe
Yokogawa analyzer, model SC202S or
FLXA-series or SA11-C1 or 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 big enough.
For that reason and specifically for
information related to the intrinsically
safety compliance like ATEX, IECEx, FM-
United States and FM-Canada, a
separate label is delivered. This label
needs to be connected onto the sensor
cable close to the sensor.
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).

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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: N3W706543
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
Principle of measurement : Contact conductivity 2-electrode system
2.2Measuring element
Electrodes : Stainless steel inner and outer electrodes
Temperature element : Pt1000
2.3Wetted parts
Sensor Body : Stainless Steel AISI 316L
Insulation : Ceramic (Aluminum oxide)
Sealing : GYLON® Style 3500 PTFE with Silica
2.4Non-Wetted parts
Connector : Amphenol Contacts : gold plated
Insulation : Polyamide
: Variopin Contacts : gold plated
Material : Nickel-plated brass
Insulation : PEEK, UL94-V0
Terminal box Housing : Aluminum
flanged models Connector: Ceramic
2.5 Functional specifications (at 25 °C)
Temperature element1: Pt1000 to IEC 751
Nominal Cell Constant : SX42-SX24 = 0.1 cm-1
SX42-SX34 = 0.01 cm-1
Note 1 : The temperature sensor included in the sensor is designed for process
compensation and for indication. It is NOT designed for process temperature
control.
2.6 Dynamic specifications
Response time temp. (t90) : SX42-S.24-.. : < 3 min.
SX42-S.34-.. : < 3 min.

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2.7 Operating range
Conductivity range* at actual process temperature : 1 μS x C.C. –200 mS x C.C.
See Figure 1
* measurement range dependent on input range analyzer.
Figure 1: Measuring range of conductivity sensors section
Temperature @ 1 Bar (14.5 PSIG) :
Threaded models (-BS, NS) : 0 °C to 200 °C (32 °F to 392 °F)
Threaded models (-BV, NV) : 0 °C to 125 °C (32 °F to 257 °F)
Flanged models : 0 °C to 250 °C (32 °F to 482 °F)
Pressure @ 25 °C for all models
Over pressure* : 0 to 40 barg (0 to 580 PSIG)
Under pressure* : 0 to 0.5 barng (0 to 7 PSIG)
Pressure @ Tmax. °C for models
-BS, -NS, -BV, -NV, -AF, -DF : Over pressure Under pressure
0 to 40 barg 0 to 0.5 barng
(0 to 580 PSIG) (0 to 7 PSIG)
-EF : 0 to 30 barg 0 to 0.5 barng
(0 to 435 PSIG) (0 to 7 PSIG)
* Unit definition: barg = bar gauge, over pressure against atmosphere.
barng = under pressure against atmosphere

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Figure 2: Pressure vs Temperature
Cable length:
Threaded models (-BS,-NS) : max. 60 meter with WU40 cable in combination
with WF10 cable and BA10 junction box
Threaded models (-BV,-NV)
- Variopin connector connected to : max. 60 meter with WU10-V-D/WE10 (possibly
FLXA analyzer. in combination with WF10 cable and BA10
junction box)
- Variopin connector connected to : 3 meter WE10 cable (as option) combined with
SA11 Smart Adapter SA11 Smart Adapter
Smart Adapter directly connected to the
analyzer using a WU11 cable up to 100 meters
or Connected to a BA11 connection box using
WU11 cable up to 100 m. The BA11 connection
box is connected to the analyzer using a WU11
cable up to 100m
Flanged models : max. 60 meter with customer specified high
temperature cable
2.8Shipping details
Package size (LxWxH) : Threaded models 300 x 100 x 75 mm
(11.8 x 3.9 x 3.0 inch)
Flanged models 480 x 275 x 235mm
(18.9 x 10.8 x 9.3 inch)
Package weight (max.) : Threaded models 0.5 to 0.7 kg (1.1 to 1.5 lbs)
Flanged models 5.7 to 6.0 kg (12.6to13.2 lbs)

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2.9Environmental conditions
Storage temperature : -30 ºC to +50 ºC (-22 ºF to +122 ºF)
Ingress Protection Type Amphenol connector : IP65 (conform IEC 60529)
Ingress Protection Type Variopin connector : IP67 (conform IEC 60529)

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2.10 Regulatory standards
IECEx Applying standards : IEC 60079-0
: IEC 60079-11
Certificate no.* : IECEx DEK 14.0032X, issue 1
Ex ia IIC T2…T6 Ga
Electrical data : See Note 2
Specific conditions of use : See Note 3
CE - ATEX : Directive 2014/34/EU
Applying standards : EN IEC 60079-0
EN 60079-11
Certificate no.* : DEKRA 14ATEX0074X, issue 2
II 1 G Ex ia IIC T2…T6 Ga
Electrical data : See Note 2
Specific conditions of use : See Note 3
- 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 2 : Sensor input circuits when connected to an analog intrinsically safe certified
SC transmitter (e.g. Yokogawa transmitter Model FLX21/FLX202 series or
Yokogawa transmitter Model SC202S series):
In type of protection intrinsic safety Ex ia IIC maximum input values are:
Ui= 14.4 V, Ii= 116.5 mA, Pi= 0.3424 W, Li= 0 mH, Ci= 0 nF (-SX.. type) or
Ci= 0.4 nF (BS, NS and *F type).
For cable parameters see for reference control drawing FM-Unites States
Page 14-17.
Sensor input circuits when connected to a digital intrinsically safe certified
SA11-C1 Smart Adapter:
In type of protection intrinsic safety Ex ia IIC maximum input values are:
Ui= 6.6V, Ii= 100 mA, Pi= 165 mW, Li= 0 mH and Ci= 0.4nF (BV and NV type).
For cable parameters see for reference control drawing FM-Unites States
Page 14-17.
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.

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Note 3 : Ambient temperature:
-30°C to +40°C for temperature class T6,
-30°C to +95°C for temperature class T5,
-30°C to +125°C for temperature class T4 (BV and NV type),
-30°C to +130°C for temperature class T4 (BS, NS and *F types),
-30°C to +125°C for temperature class T3 (BV and NV type),
-30°C to +165°C for temperature class T3 (BS, NS and *F types),
-30°C to +125°C for temperature class T2 (BV and NV type),
-30°C to +275°C for temperature class T2 (BS, NS and *F types).
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 the certificate is updated with a new issue number.
- ATEX:
DEKRA14ATEX0074 X, issue 1 (effective from 06-2014)
DEKRA11ATEX0074 X, issue 2 (effective from 02-2021)
- IECEx:
IECEx DEK 14.0032X, issue 0 (effective from 06-2014)
IECEx DEK 14.0032X, issue 1 (effective from 02-2021)
Label information:
All statutory required label information is written on a metallized product label.
This includes MS-code, serial number and process operating specifications.
Example of a product label see figure 3.
Figure 3: Sensor product label
Remarks:
1. Position of text/logos can deviate from the figure as shown
2. Number of non-intrinsically safe related text/logos can deviate from the figure as
shown
3. Specific Ex marking depends on certification region
4. If product is too small to fit a label with necessary text, this text will be on a
Brady B-435 Thermal Transfer Printable Gloss Metallized Polyester label printed
with Brady Series R6000 ribbon, to be placed on a plastic carrier for affixing
adjacent to the product.
* For sensors with IS certification a
separate plastic label card is provided.
(For example, see figure 4)
This label contains information on IS for:
- ATEX
- IECEx
- FM-United States
- FM-Canada Figure 4: Product label FM-US and FM-CAN

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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
IS CL I, DIV 1, GP ABCD, T2…T6
CL I, ZN 0, AEx ia IIC, T2…T6 Ga
Control Drawing: D&E 2020-024-A50
Electrical data : See Note 4
Specific conditions : See Control Drawing D&E 2020-024-A50. (Page 15-18)
of use Temperature classes for SX42 models are defined
T2…T6, see Note 5
Note 4 : 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 2020-024-A50.
Maximum sensor input parameters:
Ui= 14.4 V; Ii= 116.5 mA; Pi= 0.3424 W; Li= 0 mH
Ci= 0 nF (BS, NS and *F type) or Ci=0.4 nF (BV and NV type).
Note 5 : Ambient temperature:
-30°C to +40°C for temperature class T6,
-30°C to +95°C for temperature class T5,
-30°C to +125°C for temperature class T4 (BV and NV type),
-30°C to +130°C for temperature class T4 (BS, NS and *F types),
-30°C to +125°C for temperature class T3 (BV and NV type),
-30°C to +165°C for temperature class T3 (BS, NS and *F types),
-30°C to +125°C for temperature class T2 (BV and NV type),
-30°C to +275°C for temperature class T2 (BS, NS and *F types).
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 the certificate is updated with a new issue number.
- FM-United States:
FM20US0123X (effective from 03-2021)

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Control drawing: D&E 2020-024-A50 (part 1)

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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= 14.4 V, Io = 116.5 mA, Po = 342.4 mW.
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
SX42
-abcd-efgh
/i
abcd
Cell Constant:
Four alphanumeric character (A to Z, 0 to 9 or a
hyphen)
ef
Connection type:
BS ISO7/1-R1 screw thread + connector without ID-chip
BV ISO 7/1-R1 screw thread + connector with ID-chip
NS NPT screw thread + connector without ID-chip
NV NPT screw thread + connector with ID-chip
AF 2-inch 600 LBS ANSI flange + terminal block
DF DN50-PN63 EN flange + terminal block
EF DN50-PN40 EN flange + terminal block
g
Spare code:
Any one character
h
Style code:
A
i
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.
WARNING－POTENTIONAL IGNITION HAZARD –SEE INSTRUCTIONS
Contact Conductivity sensors containing light metals, must be installed and used in
such a way that, even in the event of rare incidents, ignition sources due to impact
and friction sparks are excluded.

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Control drawing: D&E 2020-024-A50 (part 2)

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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-C1, with the following maximum values: Uo= 6.6V, Io = 100mA, Po = 165mW.
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-C1 Smart Adapter however provides this
required isolation.
5. Sensor Model code:
Table 4
Model
Suffix Codes
Option Codes
SX42
-abcd-efgh
/i
abcd
Cell Constant:
Four alphanumeric character (A to Z, 0 to 9 or a
hyphen)
ef
Connection type:
BV ISO 7/1-R1 screw thread + connector with ID-chip
NV NPT screw thread + connector with ID-chip
g
Spare code:
Any one character
h
Style code:
A
i
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.
WARNING－POTENTIONAL IGNITION HAZARD –SEE INSTRUCTIONS
Contact Conductivity sensors containing light metals, must be installed and used in
such a way that, even in the event of rare incidents, ignition sources due to impact
and friction sparks are excluded.

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FM-Canada
Applying standards : CAN/CSA-C22.2 No. 60079-0
CAN/CSA-C22.2 No. 60079-11
Certificate no.* : FM20CA0062X
IS CL I, DIV 1, GP ABCD, T2…T6
CL I, ZN 0, Ex ia IIC, T2…T6 Ga
Control Drawing: D&E 2020-024-A51
Electrical data : See Note 6
Specific conditions : See Control Drawing D&E 2020-024-A51. (Page 20-23)
of use Temperature classes for SC42 models are defined
T2…T6, see Note 7.
Note 6 : 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 2020-024-A51.
Maximum sensor input parameters:
Ui= 14.4 V; Ii= 116.5 mA; Pi= 0.3424 W; Li= 0 mH;
Ci= 0 nF (BS, NS and *F type) or Ci=0.4 nF (BV and NV type).
Note 7 : Ambient temperature:
-30°C to +40°C for temperature class T6,
-30°C to +95°C for temperature class T5,
-30°C to +125°C for temperature class T4 (BV and NV type),
-30°C to +130°C for temperature class T4 (BS, NS and *F types),
-30°C to +125°C for temperature class T3 (BV and NV type),
-30°C to +165°C for temperature class T3 (BS, NS and *F types),
-30°C to +125°C for temperature class T2 (BV and NV type),
-30°C to +275°C for temperature class T2 (BS, NS and *F types).
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 the certificate is updated with a new issue number.
- FM-Canada:
FM20CA0062X (effective from 03-2021)

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Control drawing: D&E 2020-024-A51 (part 1)