SUTO S418 Manual
English
Instruction and operation manual
S418
Thermal mass flow sensor
(with data logger)
Dear Customer,
Thank you for choosing our product.
Before you start up the device, please read the operating instructions in
full and carefully observe them. 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 canceled and the manufacturer is e empt from liability.
The device is destined e clusively for the described application.
SUTO offers no guarantee for the suitability for any other purpose.
SUTO is also not liable for consequential damage resulting from the
delivery, capability or use of this device.
2 S418
Table of Contents
1 Safety instructions......................................................................4
2 Registered trademarks.................................................................6
3 RF e posure information and statement.........................................6
4 Application.................................................................................8
5 Features....................................................................................8
6 Technical Data............................................................................9
6.1 General data.........................................................................9
6.2 Electrical data.....................................................................10
6.3 Data logger.........................................................................10
6.4 Output signals.....................................................................10
6.5 Accuracy ...........................................................................10
6.6 Additional data for models with pressure sensor......................11
7 Dimensional drawing..................................................................11
8 Installation...............................................................................12
8.1 Installation considerations....................................................12
8.2 LED indicators.....................................................................13
8.3 Electrical connection............................................................14
9 Sensor signal outputs................................................................15
9.1 Analog output.....................................................................15
9.2 Pulse output.......................................................................15
9.3 Modbus output....................................................................18
10 Configuration..........................................................................19
11 Read and analysis of measurement data.....................................20
11.1 Data logger.......................................................................20
11.2 Operations........................................................................21
11.2.1 Logger configuration.....................................................21
11.2.2 Data read-out and analysis............................................21
12 Calibration..............................................................................22
13 Disposal or waste....................................................................22
14 Appendi A - Specifications.......................................................23
14.1 Flow ranges......................................................................23
14.2 Order table.......................................................................23
14.3 Error codes.......................................................................25
15 Appendi B - Modbus communication e ample............................26
S418 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 / qualified
personnel.
This instruction manual must be available at the operation site of the
flow 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 e ceed the ma imum permitted pressure range (see
sensors label).
•Only use pressure tight installation material.
•Avoid that persons get hit by escaping air or bursting parts of the
instrument.
•The system must be pressureless during maintenance work.
WARNING!
Voltage used for supply!
Any contact with energized parts of the product, may
lead to an 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.
•Any electrical work on system is only allowed by authorized
qualified personal.
4 S418
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 e ceed the permitted operating parameters.
•Make sure the product is operated in its permitted limitations.
•Do not e ceed or undercut the permitted storage and operation
temperature and pressure.
•The product should be maintained and calibrated frequently, at
least annually.
General safety instructions
•It is not allowed to use the product in e plosive areas.
•Please observe the national regulations before/during installation
and operation.
Remarks
•It is not allowed to disassemble the product.
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
•Always observe the direction of the flow when installing the
sensor. The direction is indicated on the housing.
•Do not e ceed the ma imum operation temperature at the sensors
tip.
•Avoid condensation on the sensor element as this will affect
accuracy enormously.
Storage and transportation
•Make sure that the transportation temperature is between
-30 ... +70 °C.
S418 5
1 Safety instructions
•For storage and transportation it is recommended to use the
packaging which comes with the sensor.
•Make sure that storage temperature of the sensor is between
-10 ... +50°C.
•Avoid direct UV and solar radiation during storage.
•For the storage the humidity must be <90% with no condensation.
2 Registered trademarks
SUTO®
Registered trademark of SUTO iTEC
MODBUS®
Registered trademark of the Modbus Organization, Hopkinton, USA
HART®
Registered trademark of the HART Communication Foundation, Austin,
USA
PROFIBUS®
Registered trademark of the PROFIBUS User Organization, Karlsruhe,
Germany
Bluetooth® word mark and logos
Registered trademarks of Bluetooth SIG, Inc.
Android™, Google Play
Trademarks of Google LLC
3 RF exposure information and statement
This equipment complies with FCC RF radiation e posure limits set forth
for an uncontrolled environment. This equipment should be installed
and operated with minimum distance of 20 cm between the radiator and
your body.
This device complies with part 15 of the FCC rules. Operation is subject
to the following two conditions: (1) this device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
NOTE: The manufacturer is not responsible for any radio or TV
interference caused by unauthorized modifications to this equipment.
6 S418
3 RF exposure information and statement
Such modifications could void the user’s authority to operate the
equipment.
NOTE: This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment
generates uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or
more of the following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Connect the equipment into an outlet on a circuit different
from that to which the receiver is connected.
•Consult the dealer or an e perienced radio/TV technician for
help
•This device and its antenna(s) must not be co-located or
operating in conjunction with any other antenna or transmitter.
S418 7
4 Application
4 Application
The S418 is the thermal mass flow sensor that is designed to measure
the consumption of compressed air and other gases within the
permissible operating parameters. (These parameters are stated in
chapter 6 Technical Data).
The S418 can measure the following parameters:
•Volumetric flow (default unit: l/min)
•Total consumption (default unit: m3)
•Pressure of the fluid (optional) (default unit: bar)
Other units are configurable using the service App S4C-FS, which can be
downloaded from the Google Play Store or our Website. For more
information see chapter 10.
5 Features
•Inline thermal mass flow sensor virtually independent of pressure
and temperature changes.
•Process connection of G-type thread with DN8, DN15, DN20 and
DN25 available
•Very short response time.
•Particularly suitable for measuring at the point-of-use flow and
consumption of compressed air and other gases.
•Integrated display showing volumetric flow.
•Options for output signals:
◦Analogue 4 … 20 mA and pulse output
◦Modbus interface
◦M-Bus interface
•Bluetooth interface for remote sensor settings
•Configurable through Android devices
•Embedded Data logger capable of recording 5-million
measurement samples
8 S418
6 Technical Data
6 Technical Data
6 1 General data
FCC ID: 2ASK2-SUTO-003
Parameters Volumetric flow: l/min, m3/h, m3/min, cfm
Consumption: m3, ft3
Medium pressure: bar, psi
Reference conditions Selectable by users. Default e -factory
settings:
•Compressed air: ISO1217 20°C, 1000 hPa
•Other gas: DIN1343 0°C, 1013.25 hPa
Principle of measurement Thermal mass flow
Sensor Glass coated resistive sensor
Measured gases Non-corrosive gases, up to 2 calibrated gases
Ambient temperature
/Transport temperature
0 ... +50°C / -30 … +70°C
Medium conditions 0 ... +50°C, rH<90%, no condensation
Operating pressure 0 ... 1.0 MPa
Pressure drop Ma imum pressure drop at the ma imum flow
of Standard (S) flow range:
•DN8 type : 30 hPa
•DN15 type: 100 hPa
•DN20 type: 100 hPa
•DN25 type: 200 hPa
Casing Process connection: aluminum alloy
Wetted parts: aluminum alloy
Top casing: PC + ABS
Protection class IP54
Dimensions See dimensional drawing on page 11.
Display 4-digit LED display
Tube diameter DN8, DN15, DN20, DN25
Process connection: G inner thread ISO 228-1
Weight 0.43 kg (DN8), 0.46 kg (DN15)
0.96 kg (DN20), 0.97 kg (DN25)
S418 9
6 Technical Data
6 2 Electrical data
Power supply 15 ... 30 VDC, 120 mA @ 24 VDC
6 3 Data logger
Memory size Up to 8,000,000 samples.
Recording channels Up to 3: flow, consumption, and pressure.
Logger programming Use the Android app S4C-FS
(Free for download on Google Play Store)
Logger readout Use Windows-based software - S4A via USB
(Free for download on the SUTO Website)
6 4 Output signals
Analogue output Signal: 4 ... 20 mA, isolated
Scaling: 0 to ma flow
Ma load: 250R
Pulse output 1 pulse per consumption unit (m3 or ft3)
isolated switch, ma . 30 VDC, 200 mA
(pulse length: 10 ... 120 ms, depends on flow
rate)
Modbus output See section 9.3
6 5 Accuracy
Accuracy*
(at 6 bar, 20°C,
rH<40%)
± (1.5% of reading + 0.3% FS)
Temperature coefficient < 0.1%/K FS
Pressure coefficient <5% / 1 MPa
Turndown ratio 100:1
Stated accuracy at Ambient/process temperature 23°C ± 3°C
Ambient/process humidity <90%
Process pressure at 0.6 MPa
10 S418
6 Technical Data
Repeatability ± 0.5% of reading
Sampling rate 10 samples per second
* The specified accuracy is valid only within the minimum and ma imum
flow rates that are indicated in section 14.1.
6 6 Additional data for models with pressure sensor
Accuracy ± 0.5% FS
Parameters Pressure: bar (default) or psi
Sensor Piezzo-resistive sensor
Measuring range 0 … 1.0 MPa
7 Dimensional drawing
A (mm) B (mm) C (mm) D (mm) E (mm)
DN 8/15 35.0 48.0 120.4 35.0 93.0
DN 20/25 48.0 61.0 178.0 48.0 106.0
S418 11
8 Installation
8 Installation
S418 is delivered with following components:
Qty Description Order no
1S418 Thermal mass flow meter
S695 4180
S695 4181
S695 4182
S695 4183
S695 4185
S695 4186
S695 4187
S695 4188
1 5 m cable with M8 connector and open ends A553 0136
1 USB cable A553 0130
1 Instruction and operation manual No
1 Calibration certificate No
8 1 Installation considerations
To maintain the accuracy stated in the technical data, the sensor must
be installed inline and fitted to tubes with the same diameter. Please
note the following:
•The sensor is for indoor use only! At an outdoor installation, the
sensor must be protected from solar radiation and rain.
•It is strongly recommend not to install S418 permanently in the
wet environment which e ists usually right after a compressor
outlet.
12 S418
8 Installation
8 2 LED indicators
The S418 provides four LED indicators on the display panel, which
indicate the status of the data logger, display, and Bluetooth connection
separately.
LED Function Status
Rec Indicator for the logger state On: NAND flash is formatting.
Flashing: Data logger is
working
lpm Indicator for the display state
(volumetric flow)
On: The display is showing the
volumetric flow rate.
Flashing: N/A
stat. Indicator for the Bluetooth
state
On: The Bluetooth is
connected.
Flashing: N/A
bar Indicator for the display state
(pressure)
On: The display is showing the
pressure value.
Flashing: N/A
S418 13
8 Installation
8 3 Electrical connection
The flow sensor comes with two connector plugs “A” and “B”. By default
the sensor is delivered with one 5 m cable with a M8 connector on one
side and open wires on the other side. To operate the S418, one cable
connection is sufficient. However if the pulse output is to be used or the
supply and signal should be on separate cables, a second connection
cable must be ordered.
Legend to pin assignment
GND: Ground for Modbus
-VB: Negative supply voltage
+VB: Positive supply voltage
I+: Positive 4 ...20 mA
signal
I-: Negative 4 ... 20 mA
signal
D+: Modbus data +
D-: Modbus data -
P: Pulse signal
M-Bus: M-Bus data
NA: Not Applicable
Pin assignment connector plug M8
Output Version Connector Pin 1 Pin 2 Pin 3 Pin 4
Modbus A D- -VB +VB D+
B D- GND NA D+
Pulse and analog A I- -VB +VB I+
B I- P P I+
M-Bus A M-Bus -VB +VB M-Bus
B M-Bus NA NA M-Bus
Wire color brown white blue black
14 S418
8 Installation
ATTENTION!
Do not screw the M8 plug using force Otherwise, it may
damage the connecting pins
9 Sensor signal outputs
9 1 Analog output
The sensor has an analog output of 4 ... 20 mA. This output can be
scaled to match a desired measuring range. Standard scaling is from 0
to the ma flow. The corresponding flow in different pipe sizes can be
found in chapter 14.
9 2 Pulse output
The sensor outputs one pulse per a consumption unit. This pulse output
can be connected to an e ternal pulse counter to count the total
consumption. The number of m3 per second are summed up and
indicated after one second. Pulse length depends on flow rate.
S418 15
Sensor signal outputs
9 3 Modbus output
Mode : RTU
Baud rate : 19200
Device address : Last two digits of the serial number
Framing / parity / stop bit : 8, N, 1
Response timeout : 1 second
Response delay : 0 ms
Inter-frame spacing : 7 char
Remark: Modbus communication settings can be changed by the
service app S4C-FS
Channel description Resolution Format Length
Modbus
register
address
Flow 0.1 FLOAT 4-byte 6
Consumption 1 UNIT32 4-byte 8
Pressure 0.01 FLOAT 4-byte 2
Remark: The physical units of measurement channels can be
configured using the service APP S4C-FS.
In the response message that the device returns to the master:
•Function code: 03
•Byte order (32-bit data): MID-LITTLE-ENDIAN.
To properly decode the 4-byte float and unsigned integer data in
the response message, the master must change the byte order
from MID-LITTLE-ENDIAN to the order that it is using (LITTLE-
ENDIAN or BIG-ENDIAN).
Byte sequencing of byte orders
Byte order Byte sequencing (HEX) Example
MID-LITTLE-ENDIAN
(Read from the device)
A B C D 0 0A 11 42 C5
LITTLE-ENDIAN B A D C 0 11 0A C5 42
BIG-ENDIAN C D A B 0 42 C5 0A 11
18 S418
10 Configuration
10 Configuration
To change any settings on the S418, please download and install the
service App S4C-FS which is available on the Google Play store or our
Website. This App works on any Android system with Bluetooth
supported.
To be allowed to change settings, the App needs to scan the QR code
attached on the side of the sensor head or on the calibration certificate.
This ensures that only authorized users can access the sensor settings.
For more information about instructions, see the S4C-FS Instruction
and operation manual.
ATTENTION!
Changes on the settings may lead to wrong
measurement results! Contact manufacturer in case
you are not familiar with the settings
S418 19
11 Read and analysis of measurement data
11 Read and analysis of measurement data
The S418 embeds the data logger to record the measured data. You can
use the S4A, the free data analysis software to read and analyze the
data.
11 1 Data logger
Before you use the data logger, learn about how it works:
•You can use the Android App S4C-FS to enable or disable the data
logger function and set a sampling rate as needed.
•By default the data logger is disabled. Once you enable the data
logger, the S418 starts logging data. Once you disable the data
logger, the S418 stops logging.
•The S418 saves all sampled data records into one file. Each record
includes a time stamp and all measurement data sampled at this
time point, such as flow, consumption, and pressure.
•The S418 log file supports up to 5.6 million records due to its
memory size, which is equivalent to 64-day data at the one-
second sampling rate.
•When the S418 runs out of memory, the new record will replace
the oldest one.
•To read out the logs recorded in the S418 memory, install S4A
(1.1.2 or later versions), which is a specialized log analysis
software from SUTO, on a Windows-based computer. Also, connect
the PC with the S418 through the USB port.
•Data records are saved in one file in the S418, S4A reads them
out into one file as well unless the following situations occur:
•When the sampling rate is changed, S4A reads out the data
records into a different file.
•When the S418 stops logging (for e ample, poweroff) and
resumes in less than 24 hours, S4A still reads out the data
records into one file; However, if the time gap is larger than
24 hours, S4A reads out the new data records to a different
file.
•S4A enables you to have a graphic view on measurement data
recorded in a log file.
20 S418
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