SUTO S418 Manual
English
Instruction and operation manual
S418
Compact Thermal Mass Flow Meter
(Pro-Inline)
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 o Contents
1 Safety Instructions......................................................................4
2 Registered Trademarks................................................................6
3 RF E posure Information and Statement........................................7
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 ...........................................................................11
6.6 Additional Data for Models with Pressure Sensor......................11
7 Dimensional Drawing.................................................................12
8 Installation...............................................................................15
8.1 Installation Considerations....................................................15
8.2 LED Indicators....................................................................16
8.3 Electrical Connection............................................................17
9 Signal Outputs..........................................................................18
9.1 Analog Output.....................................................................18
9.2 Pulse Output.......................................................................18
9.3 Modbus Interface.................................................................19
9.3.1 Modbus Information.......................................................19
9.3.2 Connect Several S418 to Modbus Master...........................20
9.4 M-Bus Outptut....................................................................24
9.5 Connection between S418 Outputs and Customer Equipment....24
10 Configuration..........................................................................26
11 Read and Analysis of Measurement Data.....................................27
11.1 Data Logger......................................................................27
11.2 Operations........................................................................28
11.2.1 Logger Configuration....................................................28
11.2.2 Data Read-out and Analysis...........................................28
12 Calibration..............................................................................29
13 Disposal or Waste....................................................................29
14 Appendi - Specifications..........................................................30
14.1 Flow Ranges......................................................................30
14.2 Order Table.......................................................................31
14.3 Error Codes.......................................................................32
S418 3
1 Safety Instructions
1 Sa ety Instructions
Please check i this instruction manual matches 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 o 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 or supply!
Any contact with energized parts o the product
might 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
mal unctions and might result in 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 operating
temperature and pressure.
•The product should be maintained and calibrated frequently, at
least annually.
General sa ety 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 a ected by mal unction!
The product must be installed properly and
requently 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 operating temperature at the sensors
tip.
•Avoid condensation on the sensor element as this will affect
accuracy enormously.
S418 5
1 Safety Instructions
Storage and transportation
•Make sure that the transportation temperature is between
-30 ... +70 °C.
•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
Trademark Trademark owner
SUTO®SUTO iTEC
MODBUS®Modbus Organization, Hopkinton, USA
Android™,
Google Play
Google LLC
6 S418
3 RF E posure Information and Statement
3 RF Exposure In ormation 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.
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 a Compact Thermal Mass Flow Meterthe 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 SUTO Website. For more
information see chapter 10.
5 Features
•Inline thermal mass flow meter virtually independent of pressure
and temperature changes.
•Process connection of G-type thread with DN8, DN15, DN20,
DN25, and DN32 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 or iOS 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
•DN32 type: 170 hPa
Casing Process connection: aluminum alloy
Wetted parts: aluminum alloy
Top casing: PC + ABS
Protection class IP54
Dimensions See dimensional drawing on page 12.
Display 4-digit LED display
Tube diameter DN8, DN15, DN20, DN25, DN32
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), 1.7 kg (DN32)
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 mobileApp 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 on page 19
10 S418
6 Technical Data
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
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 on page 30.
6.6 Additional Data or Models with Pressure Sensor
Accuracy ±0.5% FS
Parameters Pressure: bar (default) or psi
Sensor Piezzo-resistive sensor
Measuring range 0 … 1.0 MPa
Remark:
The total consumption value is saved to the permanent memory every 5
minutes. If within these 5 minutes the device is powered off, it will
restore the last consumption value which was saved in the last cycle.
S418 11
8 Installation
8 Installation
S418 is delivered with following components:
Qty. Description Order no.
1S418 Compact Thermal Mass Flow Meter
S695 4180
S695 4181
S695 4182
S695 4183
S695 4184
S695 4185
S695 4186
S695 4187
S695 4188
S695 4189
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
•When installing the flow meter, always observe the arrows on the
housing showing the flow direction. The air/gas flow direction must
always be in line with the arrows on the housing.
S418 15
8 Installation
•Due to the integrated flow conditioner, there are no additional
straight pipe requirements for good measurement. However for
best measurement, it is recommended 3-5 times inner diameter
straight pipe at the inlet.
•The S418 can be installed in horizontal or vertical pipes.
Note:
•The device is for indoor use only! For outdoor applications, ensure
a protection from solar radiation and rain. Always observe
operating temperature and humidity as stated in the the technical
data.
•It is strongly recommend not to install S418 permanently in wet
air/gas conditions, which e ists usually right after a compressor
outlet.
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
16 S418
8 Installation
8.3 Electrical Connection
The flow meter comes with two connector plugs “A” and “B”. By default
the flow meter 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
GNDMGround for Modbus
-VBNegative supply voltage
+VBPositive supply voltage
+I Positive 4 ...20 mA signal (isolated)
-I Negative 4 … 20 mA signal (isolated)
D+ Modbus data +
D- Modbus data -
SW Isolated pulse output (switch)
M-Bus M-Bus data
NA Not Applicable、
Pin assignment connector plug M8
Output Connector Pin 1 Pin 2 Pin 3 Pin 4
Modbus A D- -VB+VBD+
B D- GNDMNA D+
Pulse and
analog
A -I -VB+VB+I
B -I SW SW +I
M-Bus A M-Bus -VB+VBM-Bus
B M-Bus NA NA M-Bus
Wire color Brown White Blue Black
ATTENTION!
Do not screw the M8 plug orcibly. Otherwise, it may
damage the connecting pins.
S418 17
9 Signal Outputs
9 Signal Outputs
9.1 Analog Output
The device 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 section 14.1 on page 30.
9.2 Pulse Output
The device 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.
18 S418
9 Signal Outputs
Volumetric
low
[m3/s]
Volumetric
low
[m3/h]
Pulse length
[ms]
Max. pulse
output
per hour
≦ 3≦ 10800 120 1080
> 3 > 10800 60 2880
> 6 > 21600 30 3960
9.3 Modbus Inter ace
9.3.1 Modbus In ormation
The default settings of the Modbus interface are as follows:
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
Response message that the device returns to the master:
•Function code: 03
The information of the byte order is shown in the table below:
Byte
Order
Sequence Data
Type
1st 2nd 3rd 4th
1-0-3-2 Byte 1
(MMMMMMMM*)
Byte 0
(MMMMMMMM *)
Byte 3
(SEEEEEEE)
Byte 2
(EMMMMMMM *) FLOAT
1-0-3-2 Byte 1 Byte 0
LSB
Byte 3
MSB Byte 2 UINT32
INT32
1-0 Byte 1
MSB
Byte 0
LSB --- --- UINT16
INT16
1-0 Byte 1
XXX *
Byte 0
DATA --- --- UINT8
INT8
* S: Sign, E: E ponent, M: Mantissa, XXX: no value
S418 19
9 Signal Outputs
Explanations o MSB and LSB
MSB MSB refers to Most Significant Byte first, which follows the Big-
Endian byte order.
For e ample, if the main system follows the MSB first order:
When the 4-byte floating number, in the order of Byte1-Byte0-
Byte3-Byte2, is received from the slave (sensor), the master
must change the byte order to Byte3-Byte2-Byte1-Byte0 for the
correct display of the value.
LSB LSB refers to Least Significant Byte first, which follows the Little-
Endian byte order.
For e ample, if the main system follows the LSB first order:
When the 4-byte floating number, in the order of Byte1-Byte0-
Byte3-Byte2, is received from the slave (sensor), the master
must change the byte order to Byte0-Byte1-Byte2-Byte3 for the
correct display of the value.
Note: Modbus communication settings as well as other settings can be
changed by the service App S4C-FS or through the windows based
Service So tware.
Available measurement channels
Channel description Resolution Format Length Register
address
Flow 0.1 FLOAT 4-byte 6
Consumption 1 UNIT32 4-byte 8
Pressure 0.01 FLOAT 4-byte 2
9.3.2 Connect Several S418 to Modbus Master
The S418 with Modbus/RTU interface can be easily daisy-chained to a
Modbus Master device. This master can be either SUTO displays and
gateways or any third-party Modbus/RTU master.
Through this method you can add up to 16 flow meters to the master
device.
9.3.2.1 Modbus/RTU Cable Length
A Modbus/RTU bus line has limitations which shall not be e ceeded,
otherwise the communication might not be stable.
•The ma imum total bus length must not e ceed 1200 m.
20 S418
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