Campbell-scientific CS125 Present Weather Sensor Bedienungsanleitung Seite 1

CS125 Present Weather Sensor Issued: 3.6.14 Copyright © 2013-14 Campbell Scientific Ltd. CSL 1000 USER GUIDE

CS125 Present Weather Sensor 2 1.2 General Safety This manual provides important safety considerations for the installation, operation and maintenan

User Guide 3 2. Technical specificationMinimum Value Nominal Value Maximum Value Visibility characteristics Reported Visibility (metric) 12 metres

CS125 Present Weather Sensor 4 RS232 output voltage high (into 3K) 4.4V - - RS485 Communications RS485 input threshold voltage -0.2V - +0.2V RS485

User Guide 5 Supported formats  RS232 (Full duplex only), default  RS485 (Half duplex)  8 bit data bytes  1 stop bit  Parity checking is

CS125 Present Weather Sensor 6 The descriptions in this section are not exhaustive. Please refer to meteorological publications for further infor

User Guide 7 If operating a CS125 indoors it is likely that there will be sources of light and/or reflections that will create false readin

CS125 Present Weather Sensor 8 mounted away from the sensor head to avoid wind flow disturbance or rain drops bouncing back up into the sensor’s sens

User Guide 9 7.3 Optional Campbell Scientific Mount A Campbell Scientific `optical sensor mount’, part number 009354, is available. This will put

CS125 Present Weather Sensor 10 Drill four 12 mm diameter holes using the mount base as a template or following the drawing below to a depth of 77 mm

User Guide 11 8. CS125 internal connectors’ description The CS125 has three standard IP66 rated glands. The first gland is by default used by the

CS125 Present Weather Sensor 12 Connector A Five way connector Pin number Description Notes Pin 1 +12V Main electronics 12V supply input (also suppo

User Guide 13 8.1 CS125 recommended wiring using Campbell Scientific cables (this cable is supplied already connected as standard) The CS125 is

CS125 Present Weather Sensor 14 9. CS215 T/RH Sensor A CS215 temperature and RH sensor can be connected to the CS125. This is recommended as it wil

User Guide 15 10. Functions of the internal switches The CS125 is equipped with four switches located within the main enclosure. These switche

CS125 Present Weather Sensor 16 Internal switch functions Switch number Function 4 Reserved for future use 3 When switched to the ON position this

User Guide 17 Refer to Appendix B for the checksum algorithm. 11.1 Visibility Only messages (CS120 emulation) Basic Format, Visibility Only STX

CS125 Present Weather Sensor 18 11.2 Messages with SYNOP Present Weather Codes SYNOP Present Weather Basic Format STX Message ID Sensor ID System

User Guide 19 11.3 Messages with METAR Present Weather Codes METAR Present Weather Basic Format STX Message ID Sensor ID System status Visibilit

CS125 Present Weather Sensor 20 Message ID break down Id Definition 0 Basic format. Contains only distance and system information 1 Partial format.

User Guide 21 User alarms ID Range Definition 1 0-1 Visibility either less or greater than a user specified threshold 2 0-1 Visibility either less

Guarantee This equipment is guaranteed against defects in materials and workmanship. This guarantee applies for twelve months from date of delivery.

CS125 Present Weather Sensor 22 Particle count Range Definition 0-7200 Value represented by an integer number of the current number of particle per

User Guide 23 11.5 SYNOP Codes produced by the CS125 The following SYNOP codes from WMO table 4680 can be output by the CS125. 00 No significan

CS125 Present Weather Sensor 24 11.6 METAR Codes produced by the CS125 The following METAR codes from WMO table 4678 can be output by the CS125. UP

User Guide 25 12.1 Configuring a PC for talking to the CS125 Described below is the procedure for setting up communications using a terminal emul

CS125 Present Weather Sensor 26 ID Name Range Description Factory default 1 Sensor ID 0-9 Separate ID used as an extra identifier for a particular C

User Guide 27 14 Serial port protocol 0-1 Selects the physical serial interface 0 = RS232 mode 1 = RS485 mode 0 15 Averaging period 1 or 10 The pe

CS125 Present Weather Sensor 28 14.1 The SET command The set command is used to configure the CS125 via the command line. The SET command is a s

User Guide 29 14.1.1 Example of a SET Command 14.2 The SETNC Command The format of the SETNC command is nearly exactly the same as the SET comm

CS125 Present Weather Sensor 30 Example data returned by the GET command – See Section 12 for more information on values returned by the `GET’ comman

User Guide 31 User Alarm 2 distance = 10000 metres Serial baud rate 2 (=38400Bd) Serial number = 1009 Visibility Units = M Continuous mode output i

CS125 Present Weather Sensor 32 Example of a POLL request The maximum response time to a poll command is 100 ms. If the setting to

User Guide 33 Menu 1: The message output menu For example, typing `2’ will toggle the units through the options `METRES’ and `FEET’ and typ

CS125 Present Weather Sensor 34 Consult the ‘calibration’ section of this manual for information on how to calibrate the CS125 present weather sensor

User Guide 35 The sensor power down voltage shown before the supply voltage is only available if the sensor is running firmware version 4 or later

CS125 Present Weather Sensor 36 Menu 9 and 0: Exiting the menu system Options `9’ and `0’ exit from the menu system. Note that typing `0’ will lose a

User Guide 37 Once you have started the tests you will be asked for the CS125 calibrator serial number and coefficient with a confirmation at eac

CS125 Present Weather Sensor 38 This part of the test will take approximately two minutes. Every ten seconds a dot should appear indicating that

User Guide 39 This part of the test will take approximately two minutes. Every ten seconds a dot should appear indicating that the test is prog

CS125 Present Weather Sensor 40 18. Cleaning The CS125 present weather sensor is a robust instrument that will provide years of uninterrupted weath

User Guide 41 19. Lubricating the enclosure screws The CS125 enclosure screws should be lubricated with a suitable anti-seize grease (often copper

PLEASE READ FIRST About this manual Some useful conversion factors: Area: 1 in2 (square inch) = 645 mm2 Length: 1 in. (inch) = 25.4 mm

CS125 Present Weather Sensor 42 5. After the bags of desiccant have been allowed to cool in an airtight desiccator, they may be removed and placed i

A-1 Appendix A. CS125 block diagram 850nm Emitter Photo-detector Transimpedance amplifier Power level + Driver circuitry Emitter power feedback Dir

CS125 Present Weather Sensor A-2

Appendix B. Example C code of the CCITT CRC The code below is provided as an example for programmers implementing their own code to communicate with

CS125 Present Weather Sensor B-2

C-1 Appendix C. Example CRBasic programs C.1 CRBasic read program 'CR800 'Demonstration program to read data from a CS125 set to continuou

CS125 Present Weather Sensor C-2 SerialInRecord(CS125_Comport,InString,&h02,0,&h03,NBytesReturned,01) 'Check that a message has b

Appendix C. Example CRBasic programs C-3 C.2 CRBasic POLL program 'CR800 'Demonstration program to read data from a CS125 set to polled ou

CS125 Present Weather Sensor C-4 'Const CS125_Poll = CHR(2)&"POLL:8:0:939A:"&CHR(3)&CHR(13) 'address 8 'Const CS1

Appendix C. Example CRBasic programs C-5 C.3 Example CRBasic SET program '--------------------------------------------------------------------

CS125 Present Weather Sensor C-6 CheckVal = CheckSum (TempStringFunc,1,0) ' Use the CCITT CRC16 checksum ' Create final string going o

Appendix C. Example CRBasic programs C-7 C.4 Example CRBasic SETNC Command '-------------------------------------------------------------------

CS125 Present Weather Sensor C-8 Dim CS125CommandString As String * 100 Dim i As Long Dim CheckVal As Long ' Create a string containing

Appendix C. Example CRBasic programs C-9 'CS215 Temperature & Relative Humidity Sensor measurements AirTC and RH SDI12Recorder(TRHD

CS125 Present Weather Sensor C-10 C.5 Example CRBasic GET program '----------------------------------------------------------------------------

Appendix C. Example CRBasic programs C-11

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3 12. Interface methods – Device Configuration Utility/Command Line/Menu ... 24 12.1 Configuring a PC for

1 CS125 Present Weather Sensor 1. Introduction The CS125 is an infrared forward scatter present weather sensor for automatic weather stations includ