SMC Networks SMC-520 User manual

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SMC-520 User Guide revision 1.3 SMC Ship Motion Control www.shipmotion.eu
SMC-520
TEMPERATURE & HUMIDITY SENSOR
USER GUIDE

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SMC-520 User Guide revision 1.3 SMC Ship Motion Control www.shipmotion.eu
Notice
The information in this User Guide is subject to change without notice.
Not all the features described in this manual are available in all hardware and firmware versions.
Please check with SMC for details of model specific features such as measurement parameters and
Protocol support.
This document is property of SMC and shall not be reproduced in any form without written approval
from SMC.
SMC Ship Motion Control is not responsible for any errors in this manual or their consequences.
All rights reserved.
SMC Ship Motion Control Ltd
Email: [e-mail]
Web: www.shipmotion.eu
Tel: [phone]

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SMC-520 User Guide revision 1.3 SMC Ship Motion Control www.shipmotion.eu
TABLE OF CONTENTS
1INTRODUCTION.................................................................................................................... 4
1.1 RECEIVING THE TEMPERATURE AND HUMIDITY SENSOR....................................................................... 4
1.2 SMC-520 DIMENSIONS ................................................................................................................ 5
1.3 INSTALLATION.............................................................................................................................. 6
1.3.1 INSTALLATION LOCATION RECOMMENDATIONS.......................................................................... 6
1.4 MOUNTING INSTRUCTIONS USING SOLAR RADIATION SHIELD .............................................................. 7
1.5 ELECTRICAL COMMUNICATION ....................................................................................................... 9
1.6 SMCINSTRUMENTS CONFIGURATION SOFTWARE ........................................................................... 10
1.6.1 DEFAULT SETTINGS AT THE FACTORY...................................................................................... 10
1.6.2 GENERAL INFORMATION CONFIGURATION SOFTWARE.............................................................. 11
2SERIAL OUTPUT STRINGS.................................................................................................... 13
2.1.1 WIXDR............................................................................................................................ 13
2.1.2 VAISALA HMP155 FORMAT ................................................................................................ 13
3CONFIGURATION COMMANDS ........................................................................................... 14
3.1 REPLIES FROM THE SMC-520...................................................................................................... 14
4MAINTENANCE................................................................................................................... 15
5SERVICE AND WARRANTY................................................................................................... 15
5.1.1 LIABILITY........................................................................................................................... 16
5.1.2 RESTRICTION OF WARRANTY ................................................................................................ 17
5.2 TECHNICAL SUPPORT .................................................................................................................. 17
6TECHNICAL SPECIFICATIONS SMC-520 ................................................................................. 18
7FAQ AND SUPPORT............................................................................................................. 19

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SMC-520 User Guide revision 1.3 SMC Ship Motion Control www.shipmotion.eu
1INTRODUCTION
The SMC-520 Temperature and Humidity sensor is an accurate, reliable and cost effective way to
measure the air temperature and humidity for many applications.
The data transmitted from the SMC Temperature and Humidity sensor is in a standard NMEA
sentence format over RS232 and RS485 that can be used by many systems as well as SMCs
Monitoring System applications for graphical presentation and data logging, listed below.
•SMChms, Helideck Monitoring System
•SMCems, Environmental Monitoring System
•SMCwms, Weather Monitoring System
The SMC-520 is produced to be used in outdoor applications. The optional SMC-560 Solar radiation
shield provides accurate temperature readings also in sunny environments. The SMC-520 uses a
PT1000 element for the temperature measurements.
1.1 RECEIVING THE TEMPERATURE AND HUMIDITY SENSOR
Unpack the equipment and remove all the packaging materials and shipping carton.
The SMC-520 sensor is delivered in a cardboard box designed to protect it from damage during
transit.
When the sensor has been received, it must be inspected for damage during shipment. If damage has
occurred during transit, all the shipping cartons and packaging materials should be stored for further
investigation. If damage is visible, a claim for shipping damage must be filed immediately.
Standard Delivered Items
•Temperature and Humidity Sensor
•Calibration Certificate
•SMC Instruments Configuration software and User Manual
•Cable with M12 connector, 3 m cable standard
Optional Items
•SMC-560 Solar Radiation Shield including Pole mounting brackets
•M12, 8 pin connector on a 5m cable
•M12, 8 pin connector on a 10m cable

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SMC-520 User Guide revision 1.3 SMC Ship Motion Control www.shipmotion.eu
1.2 SMC-520 DIMENSIONS
All dimensions are in mm

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SMC-520 User Guide revision 1.3 SMC Ship Motion Control www.shipmotion.eu
1.3 INSTALLATION
SMC highly recommend that the SMC-520 Temperature and Humidity sensor is deployed on site
inside a solar radiation shield such as the SMC-560 to achieve the optimum performance from the
sensor.
The sensor can also be installed without the shield inside a Stevenson screen.
It is not recommended to mount the sensor outside unshielded.
SMC-560 Solar Radiation Shield
1.3.1 INSTALLATION LOCATION RECOMMENDATIONS
Install the SMC-520 Temperature and Humidity sensor in an area with free air flow. Avoid positioning
the sensor in position that would not be representative of the area to be measured. Where possible
the sensor should be mounted away from heat sources, either direct such as exhausts or reflected
such as building walls. Placing the sensor to close to the ground may lead to inaccurate
measurements.

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SMC-520 User Guide revision 1.3 SMC Ship Motion Control www.shipmotion.eu
1.4 MOUNTING INSTRUCTIONS USING SOLAR RADIATION SHIELD
The SMC-560 Solar radiation shield is designed to be mounted on a pole of 30 to 60mm diameter.
After the shield has been attached to the pole, the Temperature and Humidity sensor is to be fitted
into the shield until the wider part of the sensor reach the compression fitting. Tighten the
compression fitting to hold the sensor in place. It is normally enough to tighten the fitting by hand.
After mounting in the shield connect the cable to the sensor.

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SMC-520 User Guide revision 1.3 SMC Ship Motion Control www.shipmotion.eu
1.5 ELECTRICAL COMMUNICATION
M12, 8 pin male connector on the SMC-520 schematic layout
Pin
Free cable end wire color
Sensor function
Details
1
White
Signal Ground
2
Brown
RS232 Tx
default 38400 8N1
3
Green
RS232 Rx
4
Yellow
Ground
5
Gray
VDC -
6
Pink
RS485 Data+
default 38400 8N1
7
Blue
RS485 Data-
8
Red
VDC+
Power input 12…30 VDC
Note: Please pay special attention to the SMC-520 wire colours, as applying voltage to the data wires
may damage the sensor.
The serial communication over RS232 and RS485 can be configured for the following baudrates 4800,
9600, 19200, 38400 and 57600 bps from the SMC Configuration software. The SMC-520 is set to
automatically output the strings in the selected data format in the selected output rate.

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SMC-520 User Guide revision 1.3 SMC Ship Motion Control www.shipmotion.eu
1.6 SMC INSTRUMENTS CONFIGURATION SOFTWARE
The SMC configuration software is a PC application, after the sensor serial communication has been
connected the SMC Configuration Software can be used to set the sensor configuration and
communication parameters according to requirements.
The settings entered in the SMC Configuration software are written to the sensor. The settings are
stored in flash memory inside the sensor and are not dependent on power supply or battery power.
1.6.1 DEFAULT SETTINGS AT THE FACTORY
The sensor is delivered from SMC with a set of default parameters which can be changed from the
SMC IMU Configuration Software.
The factory default communication settings are as follows.
Baud Rate 38400
8 Databits
No parity
1 stop bits

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SMC-520 User Guide revision 1.3 SMC Ship Motion Control www.shipmotion.eu
1.6.2 GENERAL INFORMATION CONFIGURATION SOFTWARE
Menu
Select to choose from the options: Detect Sensor, COM Port settings, Read settings, Firmware update
or to exit the software.
Help > About
Displays the SMC Instruments Configuration software version and contact details for SMC.
Menu button selections:
Detect Sensor
The software will search all the COM ports of the PC to find output data from a sensor, useful for a
PC with multiple COM ports from multiport serial cards.
COM Port settings
The COM port to which the sensor is attached.
If the COM port the sensor is connected to is known, this option allows a quicker connection setup to
the sensor.
Read settings
The software will read or re-read the sensor settings.
Firmware update
The sensor firmware can be updated from the configuration software. The update is done over
RS232 serial communication and should only be updated with guidance from SMC.

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Main window sections:
Sensor Information
Shows the sensor Type, Serial Number, Hardware version, Firmware version and Calibration date.
Current reading
Displays the current Temperature and Humidity values.
Protocols
Choose the Active protocol from a drop down selection
Transducer Name
Sets the device name of the transducer in the $WIXDR string
Bitrate
Select from a drop down the bitrate of the data output. The same baudrate applies for both serial
ports. Available baudrates 4800, 9600, 19200, 38400 or 57600 bps.
Parity
Sets the parity on the serial output string on both serial outputs to Odd, Even or None
Output Interval
The automatic string output rate can be set between 0.25 and 600 seconds
Average calculation time
Sets the temperature and humidity calculation average between 0 and 600 seconds. 0 means no
average set for the output.
Units
Use the drop down to select a unit for the Temperature of Celsius, Fahrenheit or Kelvin. The unit
output for humidity is in percent.
Offsets
Add an offset to the Temperature or Humidity to compensate for certain conditions.
Note, offsets should not be used in place of a full recalibration.
Command
Commands such as changing the data output rate can be sent to the sensor via this input window.
Terminal
Use the check box to enable or disable the display of incoming data in the terminal window.
Click on clear to clear the data in the terminal window.

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2SERIAL OUTPUT STRINGS
2.1.1 WIXDR
Example
$WIXDR,C,23.3,C,SMC,H,30.0,P,SMC*7B
Description
Form
Start Characters
$WIXDR
Transducer type (C)
C for temperature
Temperature (23.3)
Temperature in degrees, resolution 0.1°
Unit (C)
Unit for temperature, C=Celsius, F=Fahrenheit K=Kelvin
Name of transducer (SMC)
Default SMC, user configurable
Transducer type (H)
H for Humidity
Humidity (30.0)
Humidity in percent, resolution 0.1%
Unit (P)
Unit for humidity, P=Percent
Name of transducer (SMC)
Default SMC, user configurable
Checksum (*7B)
XOR checksum
Termination Characters
<CR><LF>
2.1.2 VAISALA HMP155 FORMAT
Example
RH= 7.8 %RH T= 23.1 'C
Description
Form
Transducer type (RH=)
RH=Relative Humidity
Humidity (7.8)
Humidity in percent, resolution 0.1%
Unit (%RH)
Unit for humidity, % Relative Humidity
Transducer type (T=)
T=Temperature
Temperature (23.1)
Temperature in degrees, resolution 0.1°
Unit ('C)
Unit for temperature, 'C=Celsius, 'F=Fahrenheit 'K=Kelvin
Termination Characters
<CR><LF>
Note: The Vaisala HMP155 string is a position based string and not comma separated

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3CONFIGURATION COMMANDS
If the SMC configuration software is preferred not to be used the following commands can be used to
setup the instrument instead using the serial command prompt over both RS232 and RS485
All commands lines should be followed by a [CR] [LF]
Commands format
Description
$upiset,1
Sensor output rate in seconds where “1” is 0.25s to 600s
$btrset,9600
The bitrate of the output. Accepted output rates are
4800, 9600, 19200, 38400, 57600 bps
$parset,n
Sets the parity of the serial output where
n = none
o = odd
e = even
$avgset,0
Sets the average time of the temperature and humidity
output. Can be set to 0 to 600s as integer values
$prtset,2
Output string format where
2 = WIXDR string format
3 = Vaisala HMP155 format
$un1set,1
Sets the unit for the temperature output
1 = Celsius
2 = Kelvin
3 = Fahrenheit
$cldget
To receive the sensor factory calibration date
$op1set,1.00
Sets the offset for the temperature sensor
$op2set,1.00
Sets the offset for the humidity sensor
$xdrset,SMC
Sets the name of the transducer in the WIXDR string
3.1 REPLIES FROM THE SMC-520
The sensor will reply with a confirmation when the command is accepted in the format as $upians,1
where the three first letters are identical to the command and the three last letters in the identifier
are replaced with “ans”.
In case the command is not accepted the sensor will reply with $ans cmd error. In case of a problem
to store the information to the built-in flash memory of the sensor the device will reply with $ans
mem err. If a parameter is set outside the available range the sensor will return the message $ans
range err.

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4MAINTENANCE
Filter
The SMC-520 is equipped with a sintered teflon filter to protect the sensing elements from water and
dirt. The filter which is located at the end of the sensor should be inspected periodically, every 6 to
12 months depending on the environmental conditions such as dust or exhaust emissions and
replaced when necessary.
Care must be taken when removing the filter, it is a screw fit and should be removed by hand so not
to crush the filter and the components it covers. Avoid touching the filter with your fingers to avoid
dirt on the Teflon area of the filter.
Cleaning
Clean the probe with a soft cloth and mild detergent, any other chemical cleaner may damage the
sensor and void any warranty.
Calibration
SMC recommends to recalibrate the temperature sensor once a year. The sensor must be sent to
SMC for recalibration. Contact [e-mail] for return details, quoting the serial number
of the sensor.
General
Check the cable, connector and the installation for potential damage in a regular interval.
5SERVICE AND WARRANTY
All products are inspected prior to shipment and SMC manufactured products are guaranteed against
defective material or workmanship for a period of two (2) calendar years after delivery date of
purchase.
SMC liabilities are limited to repair, replacement, or refund of the factory quoted price (SMC’s
option). SMC must be notified and provided with sufficient time to remedy any product deficiencies
that require factory attention. This time period may include but is not limited to standard production
lead times, travel time and raw material lead times. SMC will not be responsible for any charges
related to repair, installation, removal, re-installation, or any actual, incidental, liquidated, or
consequential damages. All claims by the buyer must be made in writing. All orders returned to SMC
must have an issued RMA number supplied by the SMC prior to shipment. Only SMC shall have the
authority to issue RMA numbers.
Any products manufactured by others supplied with and/or installed with SMC’s products are
covered by the original manufacturers’ warranty and are excluded from SMC’s warranty
SMC manufactured product must be sent to SMC for repair or replacement.
Please read the SMC Ship Motion Control terms and conditions for complete information.

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5.1.1 LIABILITY
SMC shall have no liability under the warranties in respect of any defect in the Products arising from:
specifications or materials supplied by the Buyer; fair wear and tear; wilful damage or negligence of
the Buyer or its employees or agents; abnormal working conditions at the Buyer’s premises; failure to
follow SMC’s instructions (whether oral or in writing); misuse or alteration or repair of the Products
without SMC’s approval; or if the total price for the Products has not been paid.
SMC shall in no event be liable for any indirect or consequential, or punitive damages or cost of any
kind from any cause arising out of the sale, use or inability to use any product, including without
limitation, loss of profits, goodwill or business interruption. In case of failure in the product the
company is not liable to compensate the buyer with anything exceeding the cost of the product sold
by SMC.
The exclusion of liability in these Terms & Conditions shall not apply in respect of death or personal
injury caused by SMC’s negligence.
SMC shall not be bound by any representations or statements on the part of its employees or agents,
whether oral or in writing, including errors made in catalogues and other promotional materials.
Please read the SMC Ship Motion Control terms and conditions for complete information.

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5.1.2 RESTRICTION OF WARRANTY
The warranty does not cover malfunction of the sensor generated from
-If the sensor case has been opened by the customer in an attempt to carry out repair work
-If the sensor has been fed with an over voltage in the power supply wires or the signal wires
The sensor electronics are shielded in a case of UV protected ABS plastic with O ring seals to prevent
damage from moisture.
The sensor should not be opened as this could affect the warranty on the unit. All operations inside
the sensor must be carried out by SMC personnel.
5.2 TECHNICAL SUPPORT
If you experience any problem, or you have a question regarding your sensor please contact your
local agents or SMC directly.
Refer to the SMC website at https://www.shipmotion.eu/
Please have the following information available
•Equipment Model Number
•Equipment Serial Number
•Fault Description
Worldwide Service contact
Telephone: [phone] (CET 8am –5pm)
E-mail: [e-mail]
Return Procedure
If this is not possible to solve the problem a Ship Motion Control technician will issue a Return
Material Authorization Number (RMA#). Please be ready to provide the following information.
•Name
•Address
•Telephone, E-mail
•Equipment Model Number
•Equipment Serial Number
•Installation Date
If the Sensor is under warranty, repairs are free.
Pack the sensor in its original packaging, or suitable heavy packaging.
Mark the RMA# on the outside of the package
Return the Sensor, prepaid carrier to SMC

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SMC-520 User Guide revision 1.3 SMC Ship Motion Control www.shipmotion.eu
6TECHNICAL SPECIFICATIONS SMC-520
Performance
Temperature Accuracy 0.2° Celsius
Temperature Range -40 to +60° Celsius
Temperature Long Term stability <0.1° Celsius per Year
Humidity Accuracy 1.5% in the range 0...90%, 2% in the
range 90...100%
Humidity Range 0...100%
Humidity Long Term Stability 0.25% per year typical
Communication
Com1: RS232
Com2: RS485
SMC Configuration software included
User selectable Output Protocols
Physical
Housing Material UV resistant ABS plastic
Dimensions (H x ØW) 245 x 35mm excl connector
Weight 0.2 kg
Cable connector 8 pins, M12 connector. 3 meter shielded
PUR cable included
Environmental
Operating Temperature -40° to +60° Celsius
MTBF (computed) 50 000 hours
IP66
Electrical
Power requirements 12 - 30 VDC; 0.6 W
Complies with the IEC 60945
Warranty & Support
2-year Limited Hardware & Software Warranty
Free Technical & Hardware support

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7FAQ AND SUPPORT
If no communication is seen or bad data is displayed, please refer to the FAQs below which cover the
most common configuration problems.
Configuration
Is the unit sending data with RS485 or RS232?
The sensor is always on and sends data over an RS485 serial channel.
Check the wiring as per the Electrical configuration guide to see which output is being used.
Data is being received but is either seen as bad data or wrong data.
Check which serial mode your sensor has been wired for, RS232 or RS485. The receiving comport
would have to match the sending data.
Verify that there is a signal ground connected for RS232, if not the data would not be readable.
Parameters changed in the configuration software are not being set in the sensor.
If after pressing the Set button the parameters set in the sensor are not changing, check if the sensor
Serial number, Hardware number, Firmware version and Calibration date are displayed in the
configuration software.
If not, press the Read Settings button. If the data is still not showing this is typically due to the lack of
two-way communication to the sensor. The Receive data lines are connected but not the Transmit
data lines. Check the wiring through to the sensor.
Are the cables connected correctly?
No communication with the sensor
Check the cable connection and disconnect and reconnect is necessary.
Is the sensor powered up? Voltage should be 12 to 30 VDC
Check what Baud Rate and Output Rate should be used or has been set up. Use the Detect sensor
button to scan all available ports.
The default baud rate set when the sensor is shipped from SMC is 38400 and the standard output
rate is set to 1Hz.
If there is a chance that the baud rate has been changed and the Detect sensor button does not find
the sensor, systematically check each baud rate option in the SMC sensor Configuration Software
until the correct rate is found.