SUTO S211 Manual
English
Instruction and operation manual
S211 / S215 / S220
Dew point sensor
Dear Customer,
Thank you for choosing our product.
The operating instructions must be read in full and carefully observed
before starting up the device. The manufacturer cannot be held liable
for any damage which occurs as a result of non-observance or non-
compliance with this manual.
Should the device be tampered with in any manner other than a
procedure which is described and specified in the manual, the warranty
is cancelled and the manufacturer is exempt from liability.
The device is destined exclusively for the described application.
S TO offers no guarantee for the suitability for any other purpose.
S TO is also not liable for consequential damage resulting from the
delivery, capability or use of this device.
2 S211 / S215 / S220
1 Safety instructions
Table of contents
1 Safety instructions.......................................................................4
2 Registered trademarks.................................................................6
3 Application.................................................................................7
4 Features.....................................................................................7
5 Technical data.............................................................................8
5.1 General................................................................................8
5.2 Electrical data.......................................................................9
5.3 Output signals.......................................................................9
5.4 Accuracy ............................................................................10
6 Dimensional drawing..................................................................11
7 Determination of the installation point..........................................13
8 Installation ..............................................................................14
8.1 Installation requirements......................................................14
8.2 Installation procedure ..........................................................15
8.3 Electrical connection ............................................................17
9 Signal outputs...........................................................................19
9.1 Analog output .....................................................................19
9.1.1 Scaling.........................................................................19
9.2 Modbus RT output .............................................................19
9.2.1 Holding Register table for Modbus RT .............................20
10 Optional accessories.................................................................22
10.1 Measuring chambers ..........................................................22
10.2 Service kit.........................................................................22
11 Calibration..............................................................................23
12 Maintenance............................................................................23
13 Disposal or waste.....................................................................23
S211 / S215 / S220 3
1 Safety instructions
1 Safety instructions
Please check if this instruction manual matches with the
product type
Please observe all notes and instructions indicated in this
manual. It contains essential information which must be
observed before and during installation, operation and
maintenance. Therefore this instruction manual must be read carefully
by the technician as well as by the responsible user or qualified
personnel.
This instruction manual must be available at the operation site of the
dew point sensor at any time. In case of any obscurities or questions,
regarding this manual or the product, please contact the manufacturer.
WARNING!
Compressed air!
Any contact with quickly escaping air or bursting
parts of the compressed air system can lead to
serious injuries or even death!
•Do not exceed the maximum permitted pressure range (see
sensors label).
•Only use pressure tight installation material.
•Avoid that persons get hit escaping air or bursting parts of the
instrument.
•The system must be pressure-less during maintenance work.
WARNING!
Voltage used for supply!
Any contact with energized parts of the product, may
lead to a electrical shock which can lead to serious
injuries or even death!
•Consider all regulations for electrical installations.
•The system must be disconnected from any power supply during
maintenance work.
•Any electrical work on the system is only allowed by authorized
qualified personal.
4 S211 / S215 / S220
1 Safety instructions
ATTENTION!
Permitted operating parameters!
Observe the permitted operating parameters, any
operation exceeding this parameters can lead to
malfunctions and may lead to damage on the
instrument or the system
•Do not exceed the permitted operating parameters.
•Make sure the product is operated in its permitted limitations.
•Do not exceed or undercut the permitted storage and operation
temperature and pressure.
General safety instructions
•It is not allowed to use the product in explosive areas.
•Please observe the national regulations before/during installation
and operation.
Remarks
•It is not allowed to disassemble the product.
•Always use spanner to mount the product properly.
ATTENTION!
Measurement values can be affected by malfunction!
The product must be installed properly and
frequently maintained, otherwise it may lead to
wrong measurement values, which can lead to
wrong results
Storage and transportation
•Make sure that the transportation temperature of the sensor is
between -30 ... +70°C.
•For transportation it is recommended to use the packaging which
comes with the sensor.
•Please make sure that the storage temperature of the sensor is
between -20 ... +50°C.
•Avoid direct V and solar radiation during storage.
•For the storage the humidity must be <95% rH, no condensation.
S211 / S215 / S220 5
2 Registered trademarks
2 Registered trademarks
S TO®
Registered trademark of S TO iTEC
MODB S®
Registered trademark of the Modbus Organization, Hopkinton, SA
HART®
Registered trademark of the HART Communication Foundation, Austin,
SA
PROFIB S®
Registered trademark of the PROFIB S ser Organization, Karlsruhe,
Germany
6 S211 / S215 / S220
3 Application
3 Application
The S211 / S215 / S220 are three industrial dew point sensors designed
for measuring dew point and related parameters in compressed air or
industrial gases under specified operating conditions (See next page ).
Parameter Default unit
Temperature °C
Humidity % rH
Dew point °C Td
Pressure (optional) bar (g)
Remark: You can change the units using the service
kit (optional) and the SFA software.
The S211 / S215 / S220 dew point sensors are mainly used in
compressed air systems in the industrial environment, and not
developed to be used in explosive areas. To use them in explosive
areas, please contact the manufacturer.
4 Features
•Three dew point sensor models applicable for different measuring
ranges:
•S211 measures down to -60°C Td
•S215 measures down to -20°C Td
•S220 measures down to -100°C Td
•Optional display for on-site values. The display can be rotated
340° horizontally to ease your access to readings.
•Various signal output options: 4 ... 20 mA 2-wire, 4 ... 20 mA 3-
wire, or 4 ... 20 mA 3-wire + Modbus RT .
•Optional integrated pressure sensor.
•IP65 casing provides robust protection in rough industrial
environment.
•Very fast response time ensures safe and reliable indication
whenever dew points are out of valid ranges.
S211 / S215 / S220 7
4 Features
•High accuracy of ± 2°C Td dew point.
5 Technical data
5 1 General
Parameters Standard unit dew point: °C Td
Standard unit temperature: °C
other units: °F, K
Standard unit humidity: % rH
Standard unit pressure: bar (g)
Principle of measurement Capacitive method and frequency method
Measuring range Type Range
S215 Dew point
Relative Humidity
Temperature
Pressure (option)
: -20 ... +50°C Td
: 0 ... 90 % rH
: -30 ... +70°C
: 0 ... 1.6 MPa
S211 Dew point
Relative Humidity
Temperature
Pressure (option)
: -60 ... +20°C Td
: 0 ... 90 % rH
: -30 ... +70°C
: 0 ... 1.6 MPa
S220 Dew point
Relative Humidity
Temperature
Pressure (option)
: -100 ... +20°C Td
: 0 ... 90 % rH
: -30 ... +70°C
: 0 ... 1.6 MPa
Sensor S215 / S211: Polymer
S220: QCM + Polymer
Temperature sensor: Pt100
Pressure sensor: Piezo resistive type
Measuring medium Air, Argon, O2, N2, CO2*
Ambient temperature 0 ... +50°C
Ambient humidity 0 ... 95% rH
Operating pressure -0.1 ... 1.6 MPa
-0.1 ... 35.0 MPa optional for S215 / S211
Casing material Casing: Aluminium alloy
Process thread: Stainless steel 1.4301 (S S
8 S211 / S215 / S220
5 Technical data
304)
Display cover: PC + ABS
Protection class IP65
Display (optional) 0.66” OLED display for displaying the
measured value and unit
340° horizontally rotatable**
Dimensions See dimensional drawing on the page 11
Screwing thread G ½” thread (ISO 228/1)
Weight 0.2 kg
* For CO2, the measurement range of S211 is limited to -40°C Td
** The rotation force cannot exceed 3.0 N.m
5 2 Electrical data
Power supply 15 ... 30 VDC
Current consumption 2-wire: 4 ... 20 mA
3-wire: 40 mA @ 24 VDC
3-wire with display: 50 mA @ 24 VDC
5 3 Output signals
Analog output 4 ... 20 mA 3-wire or 4 ... 20 mA 2-wire
Analog output scaling Type Scaling
S211 4 mA
20 mA
= -60°C Td
= +20°C Td
S215 4 mA
20 mA
= -20°C Td
= +50°C Td
S220 4 mA
20 mA
= -100°C Td
= +20°C Td
Modbus output Modbus RT
Modbus communication Mode: RT
Baud rate: 19200
Device address: last 2 digits of serial number
Farming / parity / stop bit: 8 / N / 1
S211 / S215 / S220 9
5 Technical data
Response time: 1 second
Response delay: 0 ms
Interframe spacing: 7 char
5 4 Accuracy
Accuracy Dew point:
+/- 1 °C Td (0 ... 20°C Td)
+/- 2 °C Td (-60 ... 0 / +20 ... +50°C Td)
+/- 3 °C Td (-100 ... -60°C Td)
Temperature: ± 0.3°C
Pressure: 0.5% FS
Repeatability of dew point ± 0.5°C
Stated accuracy at Ambient/process temperature 23°C ± 3°C
Ambient/process humidity <95% rH, no
condensation
Airflow > 2 l/min at sensor tip
10 S211 / S215 / S220
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