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3436.500.02 

Version 2.4 

Edition June 2008 

User’s Manual 

MISTRAL 

 

 

 




 

 

 



CAUTION 

 

Protect the equipment against splashing, rain and excessive sun rays.  

 

Never use the device if it is damaged or insecure. 

 

Do not open the case; there is nothing that needs servicing inside it. 



Nevertheless, if the case must be opened, you must call for some qualified 

personnel. The power supply cable must be disconnected before opening the 

case.  

 

The information contained within this document may be modified without 



warning.  

 

Swiss Timing LTD cannot be held responsible for errors within this document 



nor for any subsequent nor consequential damages (including loss of profit) 

arising from its provision, nor performance or use of products described 

herein, which will be covered by another guarantee, contract or other legal 

document.  

This symbol indicates that this product should not be disposed 

with household waste. It has to be returned to a local authorized 

collection system. By following this procedure you will contribute 

to the protection of the environment and human health. The 

recycling of the materials will help to conserve natural resources 

(valid in the EU member states and in any countries with 

corresponding legislation). 

 



 

 

© Reproduction in any manner whatsoever without the written permission of Swiss Timing Ltd. is strictly forbidden. 



© La reproduction de ce document, sous quelque forme que ce soit, et sans l’autorisation écrite de Swiss Timing Ltd., est strictement interdite. 

© Die Vervielfältigung oder Wiedergabe in jeglicher Weise ist ohne schriftliche Genehmigung von Swiss Timing Ltd. strengstens untersagt. 

 

 

P.O. Box 138, rue de l'Envers 1 



Phone 

+41 32 488 36 11 

 

2606 Corgémont, Switzerland 



Fax 

+41 32 488 36 09 

 www.swisstiming.com 

info@swisstiming.com 



SWISS TIMING LTD 

TABLE OF CONTENTS 

1

 

INTRODUCTION ...................................................................................... 1

 

2

 

INSTALLATION ....................................................................................... 1

 

3

 

CONFIGURATION.................................................................................... 3

 

4

 

INTERNAL BATTERY CHARGER........................................................... 4

 

4.1


 

New of 


Mistral

 (with the + sign on the display).....................................................4

 

4.2


 

First of 

Mistral

 (with the - sign on the display) ......................................................4



 

5

 

CONNECTIONS AND SWITCHES........................................................... 5

 

6

 

GETTING STARTED ................................................................................ 6

 

7

 

SCAN'O'VISION WITH MISTRAL ............................................................ 7

 

8

 

WIRELESS DATA TRANSMISSION........................................................ 7

 

9

 

TRANSMISSION PROTOCOL ................................................................. 8

 

10

 

MAINTENANCE .................................................................................... 8

 

11

 

TECHNICAL CHARACTERISTICS....................................................... 9

 

12

 

SUMMARY OF IAAF RULES.............................................................. 10

 




MISTRAL 

 

 



 

3436.500.02

 Version 

2.4


 Page 



1 INTRODUCTION 



Mistral

 is an Ultrasonic wind gauge (as requested by the IAAF rule 163.11) with 

integrated scoreboard displaying wind speed in the race direction from –9.9m/s to 

+9.9m/s. 

The 

Mistral

 can be used stand alone or connected (remote control) to the Scan'O'Vision 

photofinish by cable or wireless by BlueTooth (option). 

The wind speed is displayed by amber LED's with 4 steps of luminosity, automatically 

adjusted with a light sensor (from "night" to "very sunny"). 

2 INSTALLATION 

After transportation, you will need to screw the feet perpendicular [1] to the scoreboard by 

using a 5mm 6 pans wrench (not provided). 

 

2a



2b

1

1



  

Fig. 1 

 

Then you can unscrew the wind sensor pole (under the scoreboard) and screw it. 




 

 

 



Page 2

 

Version 2.4



 3436.500.02 

3

2c



3

  

Fig. 2 

 

Then install the sensor head on the top of the pole, and pass the sensor cable inside the 



pole [3]. 

 

Please verify that the correct voltage 115/230VAC is selected inside the 



Mistral

 (see 

chapter 3). The default factory setting is 230VAC. 

 

Place the board at the correct location according to the 



rules for the wind measurement. Then orientate the 

display in order for it to be seen by the spectators. 

 

The head must then be positioned in height and direction. 



The height can be adjusted at the rear of the board: 

 

1.  Unscrew the 4 hand-screws 



2.  Choose the height 

3.  Screw the 4 hand-screws 

 

The sensor height must be measured in the middle of the 



head. According to the IAAF rules, it must be situated 

1.22m from the ground (chapter 

12

 is a summary of IAAF 



rules). Normally it is when the black plate is at the top of 

the red case. 

 

Fig. 3 

 



MISTRAL 

 

 



 

3436.500.02

 Version 

2.4


 Page 

Finally the head must be placed in the direction of the race, the arrows / colour mark must 



point in the race direction (finish). In order to turn the head in the required position, use the 

three small hand-screws located under it [3].  

 

Reminder:   if you move or turn the scoreboard, do not forget to re-adjust the direction and 

height of the head.  

 

 

 



 

 

 



 

 

 



Race direction 

 

 



 

            

 

Fig. 4 

3 CONFIGURATION 

From the version 6.1 of the internal software, it is possible to select if the + sign must be 

display for positive wind measurement. 

 



 Open 

the 


Mistral

 by turning the two locks with the provided triangle key. 

  Select the internal switch: 



 

If the + sign must be 

displayed or for software 

version <6.1 

 

If the + sign must not be displayed or if 



the + sign is not present on the 

scoreboard (first version of 



Mistral

 



 

 

 



 Close 


the 

Mistral

 with by turning back the two locks with the provided triangle key. 

 



 

 

 



Page 4

 

Version 2.4



 3436.500.02 

4  INTERNAL BATTERY CHARGER 

4.1 New 

of 

Mistral

 (with the + sign on the display) 

The new version of 



Mistral

 can be powered with 115VAC or 230VAC without any manual 

switching. 

 

The internal battery is automatically charged when the main AC power is connected, even 



if the power switch is on the OFF position. If the battery is fully discharge, it will take 

approximately 2 hours to fully charge it. 



4.2 First 

of 

Mistral

 (with the - sign on the display) 

Before the first power on, please select the correct power input according to your location: 

 Open the 



Mistral

 by turning the two locks with the provided triangle key. 

  With a small screwdriver select 115V or 230V according to your country. 



 Close the 



Mistral

 with by turning back the two locks with the provided triangle key. 

 

  

 



 

Fig. 



      Fig. 

 

Do not move the I/0 internal switch of the battery charger; if must always be on I



 

The internal battery is automatically charged when the main AC power is connected, even 

if the power switch is on the OFF position. If the battery is fully discharge, it will take 

approximately 2 hours to fully charge it. 

 

The internal battery charger contains a LED (see Fig. 6), it indicates: 



Red: 

Battery charging in progress. 

Green: 

Battery fully charged. 



Green flashing: 

Battery not connected or wrong polarity. 

 



MISTRAL 

 

 



 

3436.500.02

 Version 

2.4


 Page 



5  CONNECTIONS AND SWITCHES 



Connector 

Pinning 

WINDSONIC 

(Tuchel 7pF) 

2: +12V output (maximum 40mA) 

3: RD head 

5: TD head 

7: GND 

RS422 [2x] 



(Tuchel 7pF) 

2: +12V output (maximum 40mA) 

3: Tx- 

4: Tx+ 


5: Rx- 

6: Rx+ 


E: GND 

POWER [version A] 

(Harting 4pMT) 

1: N (115 - 230VAC) 

2: L (115 - 230VAC) 

T: GND 


POWER [version B] 

(Tuchel 3pMT) 

1: L (115 - 230VAC) 

3: N (115 - 230VAC) 

E: GND 

START (Banana) 



Normally open contact for start of measurement. 

 

Switch 



Description 

SELECT 


  5 SEC. 

10 SEC. 


13 SEC. 

REMOTE 


Duration of acquisition: 

  5 seconds 

10 seconds 

13 seconds 

Selected remotely by the RS422. 

POWER 


OFF 

ON 


 

Mistral

 OFF, if AC power connected, battery is charging. 



Mistral

 ON, working on main POWER 

(115/230V)

 or (if no 

power or power failure) on battery (automatic switching). 

 

After a measurement, the display shows the result during 3 minutes and then clears. 



1

2

3



1

3

E


 

 

 



Page 6

 

Version 2.4



 3436.500.02 

6 GETTING 

STARTED 

 Install the 



Mistral

 as explained in chapter 2. 

  Connect the head on the WINDSONIC connector. 



  To work with the main power, connect the power on the POWER connector. 

  Set the power switch on ON. 



  The scoreboard will display some characters: 

 

+8.8



 (all LEDs on) 

 



---

 



  Version of the software (for example 

6.1



  Clear the scoreboard 

  Wait until the scoreboard automatically clears, if it did not happen, verify the 



WINDSONIC head is correctly connected. 

 

For a stand alone device: 



  Connect the push button (normally open contact) on the two START bananas. 

When not used, the push button can be stored by clipping it on the head's pole 

(see Fig. 3). 

  According to the rules, select the acquisition duration with the select switch (5 



sec, 10 sec or 13 sec). 

  Press the push button to start an acquisition. The measurement is automatically 



displayed. During the measurement, the point on the display is lighted. 

  The scoreboard will be cleared automatically after 3 minutes or when you start 



a new acquisition. 

  In this mode, another scoreboard or a timing device can be connected on the 



RS422 output. At the end of the acquisition, the measurement is automatically 

sent on the RS422 output. 



 

For a remote device: 

  Connect the master device (for example the Scan'O'Vision 



Bridge

 Multiplex) on 

the RS422 connector (a bi-directionnal connection is needed). 

  Set the select switch on REMOTE. 



  Control the Reset, start of acquisition and duration with master device. 

 



MISTRAL 

 

 



 

3436.500.02

 Version 

2.4


 Page 



7 SCAN'O'VISION 



WITH 

MISTRAL 

To have automatically the wind measurement into you photo-finish results, you can 

connect the 

Mistral

 to the Scan'O'Vision computer or Scan'O'Vision 

Bridge

 Serial Multiplex. 



If you want to connect the 

Mistral

 to a RS232 serial line on your computer (or the Serial 1 

or 2 of the Scan'O'Vision 

Bridge


 Serial Multiplex), you will need a RS232 

 RS422 


converter. You can also connect the 

Mistral

 (RS422 connector) directly on the Serial 3 or 

Serial 4 of the Scan'O'Vsion 

Bridge


 Serial Multiplex. 

 

In any case, be sure to never cable/use the pin 2 (+12V) of the RS422 

Mistral

 

connector. This connection is only done to power the Bluetooth wireless 



transmission option. 

 

In the Windmeter configuration window of the Scan'O'Vision software, please select as 



transmission protocol: 

 



OMEGA (<--): 

if you only want to receive the measurement (a judge is 

 operating 

the 


Mistral

). 


 

OMEGA (<-->):  if the 



Mistral

 must be controlled by the Scan'O'Vision 

 

software (no operator required on the 



Mistral

). 


 

In this window, be sure to select 9600 Bauds, 8 data bit, 1 stop bit, no parity for the 

transmission parameters. 

8 WIRELESS 

DATA 

TRANSMISSION 

As option, you can install a Bluetooth module to get wireless data transmission to the 

timing room for example. 

 

 



To fix the Bluetooth interface on the 

Mistral:

 



  Unscrew the four plastic screws of the 

Bluetooth box and remove the cover. 

  Fix the back of the box on the back of the 



Mistral

 with four M4 screws. 

  Replace the cover of the box and fix it 



with the four plastic screws. 

  Connect the cable to one of the RS422 



Tuchel connector. 

 

 



Fig. 7 

 



 

 

 



Page 8

 

Version 2.4



 3436.500.02 

9 TRANSMISSION 

PROTOCOL 

Transmission on the RS422 connector in 9600 Bauds, 8 data bit, 1 stop bit, no parity: 

 

Input of 

Mistral

 (only valid when the SELECT switch is on REMOTE): 

Acquisition duration: 



CWI XX  

Start of measurement: 



CWS  

Reset (stop the acquisition, clear the scoreboard): 



CWR  

Ask to re-send the latest measurement: 



CWO  

 

Output of 

Mistral:

 

GW 0013sxx.x¬  

This message is sent automatically at the end of each acquisition. 

 

with: 



s

Sign of the measurement (+ or -) 



 

xx.x


Value of the measurement 

 

XX



Acquisition duration (from 01 to 30 seconds) 

 

¬



Space character (20

HEX



 



: 01


HEX

 

 



: 02


HEX

 

 



: 04


HEX

 

 



: 10


HEX

 

 



: 13


HEX

 

10 MAINTENANCE 

For best performances, fully charge the internal battery at least once per year. It is also 

recommended to always store the device with the internal battery fully charged. 



 

To prevent battery damage, do not forget to switch off the device after use. 

 



MISTRAL 

 

 



 

3436.500.02

 Version 

2.4


 Page 



11 TECHNICAL CHARACTERISTICS 

Measurement duration: 

5, 10 or 13 seconds 

 

1 to 30 seconds with RS422 serial remote control 



 

Display: 

Amber LED, 250mm height 

Display luminosity: 

4 steps automatically adjusted with a light sensor 

 

        



 

 

 



 

 

Display duration: 



3 minutes after each measurement 

 

Power: 



115 / 230VAC 50/60 Hz 

 max. 


0.5A 

 

Internal battery autonomy: 



~12 hours* at maximum luminosity 

 

~60 hours* at minimum luminosity 



 

* at 20


o

C with one measurement every 10 minutes 

 

Wind speed range: 



-9.9m/s to +9.9m/s 

Wind speed accuracy: 

±0.1m/s 

 

Operating temperature: 



0

o

C to +50



o

Storage temperature:  



-25

o

C to +70



o

 



Moisture protection: 

IP54 (IP65 for the head) 

 

Dimensions (closed): 



850 x 760 x 200 mm 

Dimensions (maximum open): 

850 x 1390 x 415 mm 

 

Weight with head: 



21 kg 

 



 

 

 



Page 10

 

Version 2.4



 3436.500.02 

12  SUMMARY OF IAAF RULES 

This is a summary of IAAF rules for wind measurement. It refers to the "IAAF Competition 

Rules 2006 – 2007" handbook. Please check on the 

www.iaaf.org

 web-site for rules 

change. 


 

Track event: 

Rule # 

Text 

163.8 


The periods for which the wind velocity shall be measured from the flash of the Starter's gun or approved 

starting apparatus are as follows: 

          100m                        10s 

          100m Hurdles          13s 

          110m Hurdles          13s 

In the 200m event, the wind velocity shall be measured for a period of 10 seconds commencing when the first 

runner enters the straight.

 

163.9 



The wind gauge for track events shall be placed beside the straight, adjacent to lane 1, 50m from the finish 

line. It shall be positioned 1.22m high and not more than 2m away from the track.

 

163.10 



The wind gauge shall be read in metres per second, rounded to the next higher tenth of a metre per second, in the 

positive direction (that is, a reading of +2.03 metres per second shall be recorded as +2.1; a reading of -2.03 metres 

per second shall be recorded as -2.0). Gauges that produce digital readings expressed in tenths of metres per second 

shall be constructed so as to comply with this Rule. 

Gauges must be certified by an appropriate authority. 

All wind gauge equipment shall have been certified by the IAAF and the accuracy of the gauge used shall have 

been verified by an appropriate organisation accredited by the national measurement authority, such that all 

measurements can be traced back to national and international measurement standards.

 

163.11 


Ultrasonic wind gauges shall be used at all International Competitions under 1.1 (a) to (f). 

A mechanical wind gauge should have appropriate protection to reduce the impact of any crosswind. Where tubes 

are used, their length on either side of the measuring device should be at least twice the diameter of the tube.

 

163.12 



The wind gauge may be started and stopped automatically and/or remotely, and the information conveyed directly 

to the competition computer.

 

 

Horizontal jumps: 



Rule # 

Text 

184.4 


The wind speed shall be measured for a period of 5 seconds from the time an athlete passes a mark placed 

alongside the runway, for the Long Jump 40m from the take-off line and for the Triple Jump 35m. If an 

athlete runs less than 40m or 35m, as appropriate, the wind velocity shall be measured from the time he 

commences his run.

 

184.5 


The wind gauge shall be placed 20m from the take-off board. It shall be positioned 1.22m high and not more 

than 2m away from the runway.

 

184.6 


The wind gauge shall be the same as described in Rule 163.11. It shall be operated and read as described in Rule 

163.12 and 163.10 respectively.

 

 

 



The 

Mistral 

is an Ultrasonic wind gauge as requested by IAAF rule 163.11. 

 

 



 

 

 



 

 

P.O. Box 138, rue de l'Envers 1 



Phone 

+41 32 488 36 11  

 

2606 Corgémont, Switzerland 



Fax 

+41 32 488 36 09  

 www.swisstiming.com 

info@swisstiming.com 



SWISS TIMING LTD 

 

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