Campbell CS135 User Manual
  1. Manuals
  2. Brands
  3. Campbell Manuals
  4. Measuring Instruments
  5. CS135
  6. User manual

Campbell CS135 User Manual

Ceilometer
Hide thumbs Also See for CS135:
Table of Contents

Advertisement

Quick Links

Download this manual
CS135
Ceilometer
User Guide
Issued 18.3.13
©
Copyright
2012-2013 Campbell Scientific Ltd.
CSL 950

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the CS135 and is the answer not in the manual?

Questions and answers

Related Manuals for Campbell CS135

Summary of Contents for Campbell CS135

  • Page 1 CS135 Ceilometer User Guide Issued 18.3.13 © Copyright 2012-2013 Campbell Scientific Ltd. CSL 950...
  • Page 3 Quotations for repairs can be given on request. It is the policy of Campbell Scientific to protect the health of its employees and provide a safe working environment, in support of this policy a “Declaration of Hazardous Material and Decontamination”...

  • Page 5: About This Manual

    Campbell Scientific Ltd can advise on the recycling of the equipment and in some cases arrange collection and the correct disposal of it, although charges may apply for some items or territories.

  • Page 7: Table Of Contents

    4.7 Storage Information ................18 Section 5. Operation ............19 5.1 Terminal Mode ..................19 5.1.1 Entering / Exiting the CS135 Terminal Mode ......19 5.1.2 Terminal Mode Commands General ..........19 5.1.3 Terminal Mode Command Examples ........20 5.1.4 MCFG Command Message Types ..........23 5.1.5 STATUS Command ..............
  • Page 8 7.4 Removing the Enclosure Lid ..............59 7.5 Diagnostic LED Indicators Within the Enclosure ........60 7.6 Electrical Safety Testing ................. 61 Figures 2-1. CS135 Ceilometer ................... 3 2-2. Principle of operation ................5 4-1. Mounting footprint ................10 4-2. Setting the tilt angle ................11 4-3.

  • Page 9: Section 1. General Information

    These should be followed carefully in order to gain the maximum benefit from the use of this product. 1.3 Sensor Unit Safety The CS135 sensor has been checked for safety before leaving the factory and contains no internally replaceable or modifiable parts. WARNING Do not modify the CS135 unit.

  • Page 10: Laser Safety

    Ensure that the correct voltage supply is provided to the sensor. 1.4 Laser Safety The CS135 sensor incorporates a laser diode which is rated as a class 3B device. This is an embedded laser where the output from the sensor unit, through the optics, is minimised to class 1M.

  • Page 11: Section 2. Product Overview

    The unit should only be serviced by trained personnel. WARNING Removal of electronic module covers or connectors while the unit is powered will expose the operator to potentially hazardous voltages and risk damage to the sensor. 2. Product Overview Fig 2.1 CS135 Ceilometer...

  • Page 12: Introduction

    CS135 Ceilometer 2.1 Introduction The CS135 is a LIDAR (LIght Detection And Ranging). It emits short pulses of near infra-red light into the atmosphere from a semiconductor laser. These are scattered back by aerosols including cloud droplets. The time between transmission of the pulse and the return signal gives the range, and therefore height, of the scattering aerosols.

  • Page 13: Optical Measurement

    User Guide The control system of the CS135 is divided into three modules, DSP, TOP and PSU as follows:- DSP is the main data processing and communications unit of the CS135. TOP provides a number of safety shutdown features such as over and under laser output level.

  • Page 14: Specifications

    Due to the nature of these devices the CS135 takes a higher current during start up. The CS135 will take up to 1 KW for the first few seconds of operation dropping off quickly to its normal operating power over a period of a minute.

  • Page 15: Optical Specifications

    User Guide 2.4.4 Optical Specifications Pulse duration: 100 ns Pulse frequency 10 kHz Wavelength: 905 nm Half-angle laser divergence: 0.35 mrad Laser lifetime: 10 years typical Eye safety class: 1M 2.4.5 Environmental Specifications Standard Operating Temperature Range: -40°C to +60°C Relative Humidity Range: 0 to 100% IP Rating: IP 66 2.4.6 Communications Specifications...

  • Page 16: Section 3. Initial Checks

    Older PC operating systems may need upgrading or additional software. The CS135 will be outputting message type 001 every 10 seconds (see Section 6.2). Open terminal mode with the command “open 0”. You should now see the prompt “CS135>”, Type “Status”.

  • Page 17: Section 4. Installation

    However there are a few considerations to take into account if accurate and representative data from a site are to be obtained. In order to reduce the service frequency with the unit, the CS135 should be placed away from sources of contamination. More regular maintenance will be required when the instrument is placed in areas where contamination is unavoidable or where measurements may be safety related.

  • Page 18: Tilt Angle

    Remove the washers and nuts from the protruding length screw. Then lower the CS135 into place. If you plan to tilt the unit make sure it is orientated so that when tilted in the preferred direction the window angle steepens.

  • Page 19: Setting The Tilt Angle

    User Guide Fig 4.2 Setting the Tilt Angle...

  • Page 20: Connectors And Wiring

    4.5 Connectors and wiring 4.5.1 Base connectors The CS135 has three connectors on its base. One is for communications, one provides power input to the unit itself and the other one takes power from the unit to the hood heater and blower.

  • Page 21: Wiring Using Supplied Campbell Scientific Cables

    Screen *If hardware handshaking is not used pins 7 and 8 should be connected together. 4.5.2 Wiring Using Supplied Campbell Scientific Cables Two cables are supplied, each 10m long. One is for the mains power supply, the other is for communications.
  • Page 22 CS135 Ceilometer WARNING The power cable must not be carrying mains voltage when it is being connected or disconnected. 4.5.2.1 Power Connections The following guidance is given to help the wiring and installation of a permanent power supply to the sensor.

  • Page 23: Usb Connection

    A USB port is provided inside the enclosure to aid on-site maintenance. This allows communication of commands to the CS135 and responses in the same form as the main serial port except that the baud rate is fixed at 115200 (see Fig 4.5).

  • Page 24: Connecting The Back-Up Battery

    CS135 Ceilometer Fig 4.5 USB port 4.6 Connecting the Back-up Battery The CS135 will be shipped with the back-up battery disconnected. It should be connected as shown in Fig 4.6 before bringing the unit into use. Fig 4.6 Connecting Battery To do this the cover and enclosure lid must first be removed.

  • Page 25: Removing The Cover

    User Guide 4.6.1 Removing the Cover The cover is removed by removing the four screws as shown in Fig 4.7. Fig 4.7 Removing the Cover The cover can then be lifted away. The cover contains a flying lead used to take power to the CAUTION hood heater and blower.

  • Page 26: Storage Information

    Removing the enclosure lid may expose hot surfaces 4.7 Storage Information The CS135 should be stored between -40°C to +70°C in a dry place, preferably with the enclosures securely fastened. The optics should be protected from possible accidental damage. For storage the back-up battery should be disconnected.

  • Page 27: Section 5. Operation

    The CS135 can be setup and controlled by using the terminal interface where discrete commands are sent. The terminal commands can be sent via a logger to the CS135 removing the need for a local PC to set up the unit. The terminal emulators built into many Campbell Scientific software products can also be used.

  • Page 28: Terminal Mode Command Examples

    (,). Back space will abort the command. 5.1.3 Terminal mode command examples The following text shows an example of setting up the CS135 serial port. This example would set the serial port to RS232 full duplex at 115200bps, 8 data bits, no parity and if it was in RS485 mode then a 100mS turn around delay.

  • Page 29: Summary Of The Terminal Mode Commands Available

    Laser = 1, Laser on after power up (default). Laser_Power = 20%-100%, default 100%. LASEROFF No parameters Instructs the CS135 to turn the laser off until either a power cycle or the sensor is instructed to turn the laser back on. LASERON No parameters...
  • Page 30 Boost_Volts sets the boost voltage to be applied to the PSUs battery in mV. From 11000 to 16000. (Note: It is not recommended that the customer alters this parameter without first consulting Campbell Scientific.). The default is 14520. Battery_Current sets the charge current in milli-amps (mA). From 100 to 1500.

  • Page 31: Mcfg Command Message Types

    Description No message 001 (default) Campbell Scientific Message 1, no sky condition, no profile data Campbell Scientific Message 2, no sky condition, profile data, 2048 range bins, 5m resolution 003* Campbell Scientific Message 3, sky condition, no profile data 004*...

  • Page 32: Status Command

    CL31 Message 2, 770 range bins, 5m resolution 111* CL31 Message 2, No profile data 112* CL31 Message 2, Full CS135 output, 2048 range bins, 5m resolution CT25K message 1 114* CT25K message 6 * = available in future OS 5.1.5 STATUS command...
  • Page 33 User Guide command) Line Example line output Heaters A B C Description of the line sections Section Description Hood blower mode Internal heater mode Laser heater mode Line Example line output MCFG X A B C D E Description of the line sections Section Description Message interval (Note: Refer to the MCFG command)
  • Page 34 CS135 Ceilometer Line Example line output HOffset A Description of the line sections Section Description Height offset reported in feet or metres dependent upon the UNITS command Line Example line output LaserRunDays Description of the line sections Section Description Number of days that the laser module has been active for...

  • Page 35: Message Polling

    Where Message_ID is a CS135message type as defined in Section 5.1.4. Example of how to use the CS135 POLL command to request preconfigured message outputs. First configure the CS135 to use polling mode from the terminal interface via the “MCFG” command as follows: CS135> MCFG 0...

  • Page 36: Loading A New Operating System

    Example of how to use the POLL command to request a specific message output type. First configure the CS135 into polling mode as shown in the example above and exit the terminal interface. To poll the CS135 for a particular message type, type the following.

  • Page 37: Led Indicator

    User Guide If the switch is pushed for four seconds the CS135 will reboot in exactly the same way as the REBOOT terminal command. If it is held closed while the CS135 is powered off and on again it will return to factory defaults. Note that to power cycle the CS135 the battery has to be disconnected as well as switching the main power off and on.

  • Page 38: Section 6. Messages

    6. Messages 6.1 Data Messages General The CS135 can provide a variety of data message types to allow efficient output of data. Not all messages provide the full information available but these messages may be more efficient in terms of data storage and transmission.
  • Page 39 User Guide 1 = One cloud base detected 2 = Two cloud bases detected 3 = Three cloud bases detected 4 = Four cloud bases detected 5 = Full obscuration determined but no cloud base detected 6 = Some obscuration detected but determined to be transparent / = Raw data input to algorithm missing or suspect WA (1 character) = Warning or alarm status: 0 = No alarm or warning...
  • Page 40 CS135 Ceilometer 0004 XXXX XXXX Photo diode and Laser windows are dirty. This can only be set if the laser is on 0002 XXXX XXXX Tilt beyond limit set by user, default 45 degrees 0001 XXXX XXXX No communications between DSP and inclinometer board...
  • Page 41 User Guide LINE 3 ETX CRC16 EOT CR LF where ETX = End-of-Text character CRC16 (4 characters) = CRC16-CCITT Checksum EOT = End-of-Transmission character CRLF = Carriage Return + Line Feed...
  • Page 42 CS135 Ceilometer MESSAGE 002 (Profile, no sky condition) LINE 1 SOH CS ID OS N ETX CR LF where SOH = Start-of-Heading character CS = Always "CS" ID(1 character) = A single ASCII character, 0-9, a - z or A - Z, case sensitive. Default ID = 0 OS (3 characters) = Operating system, 001 ...
  • Page 43 User Guide h2 (5 characters) = 2nd Height If detection status is 2, 3 or 4 h2 = Second highest cloud base reported If detection status is 5 h2 =  H ighest signal received If detection status is 0, 1, or 6 h2 =  ...
  • Page 44 CS135 Ceilometer LINE 4 SSSSSSSSSSSSSSSSSSSSSSSSSSSSS..(2048 x 5 bytes) CR LF The two-way attenuated normalised backscatter profile (100000·srad·km) unless otherwise scaled by the Attenuated_SCALE parameter. Each sample is coded with a 20-bit HEX ASCII character set; msb nibble and bit first, 2's complement.
  • Page 45 User Guide MESSAGE 003 (no profile, sky condition, available in future OS) LINE 1 SOH CS ID OS N ETX CR LF where SOH = Start-of-Heading character CS = Always "CS" ID(1 character) = A single ASCII character, 0-9, a - z or A - Z, case sensitive. Default ID = 0 OS (3 characters) = Operating system, 001 ...
  • Page 46 CS135 Ceilometer h2 (5 characters) = 2nd Height If detection status is 2, 3 or 4 h2 = Second highest cloud base reported If detection status is 5 h2 =  H ighest signal received If detection status is 0, 1, 5 or 6 h2 =  ...
  • Page 47 User Guide h5h5h5 (3 characters) = Height of the 5th cloud layer in 10s of metres or 100s of feet, if no 5th layer is reported h5h5h5 = '///'. CR LF = Carriage Return + Line Feed LINE 5 ETX CRC16 EOT CR LF where ETX = End-of-Text character CRC16 (4 characters) = CRC16-CCITT Checksum...
  • Page 48 CS135 Ceilometer MESSAGE 004 (profile, sky condition, available in future OS) LINE 1 SOH CS ID OS N ETX CR LF where SOH = Start-of-Heading character CS = Always "CS" ID(1 character) = A single ASCII character, 0-9, a - z or A - Z, case sensitive. Default ID = 0 OS (3 characters) = Operating system, 001 ...
  • Page 49 User Guide h2 (5 characters) = 2nd Height If detection status is 2, 3 or 4 h2 = Second highest cloud base reported If detection status is 5 h2 =  H ighest signal received If detection status is 0, 1, or 6 h2 =  ...
  • Page 50 CS135 Ceilometer CR LF = Carriage Return + Line Feed LINE 4 scale res n energy lt tr ti_bl pulse rate sum CR LF where scale (5 characters) = Scale parameter,%, 0 ... 99999. 100% is default res (2 characters) = Backscatter profile resolution in metres.

  • Page 51: Cl31 Messages

    User Guide LINE 6 ETX CRC16 EOT CR LF where ETX = End-of-Text character CRC16 (4 characters) = CRC16-CCITT Checksum EOT = End-of-Transmission character CR LF = Carriage Return + Line Feed 6.3 CL31 Messages MESSAGES 101 - 106, (CL31 MESSAGE 1) LINE 1 SOH CL ID OS 1 Samples ETX CR LF where...
  • Page 52 CS135 Ceilometer LINE 2 S WA h1 h2 h3 flags CR LF where S (1 character) = message status: 0 = No significant backscatter 1 = One cloud base detected 2 = Two cloud bases detected 3 = Three cloud bases detected...
  • Page 53 User Guide Description of the most significant alarm word (left word, bits going left to right) Description 8000 XXXX XXXX Transmitter shut-off 4000 XXXX XXXX Transmitter failure 2000 XXXX XXXX Receiver failure 1000 XXXX XXXX Reserved for future use 0800 XXXX XXXX Reserved for future use 0400 XXXX XXXX Memory error...
  • Page 54 CS135 Ceilometer CR LF = Carriage Return + Line Feed LINE 3 scale res n energy lt tr ti_bl L0112HN15 sum CR LF where scale (5 characters) = Scale parameter,%, 0 ... 99999. 100% is typical res (2 characters) = Backscatter profile resolution in metres.
  • Page 55 User Guide LINE 5 ETX CRC16 EOT CR LF where ETX = End-of-Text character CRC16 (4 characters) = CRC16-CCITT Checksum EOT = End-of-Transmission character CR LF = Carriage Return + Line Feed...
  • Page 56 CS135 Ceilometer MESSAGES 107 - 112, CL31 Message 2 (available in future OS) LINE 1 SOH CL ID OS 2 Samples ETX CR LF where SOH = Start-of-Heading character CL = Always CL ID = A single ASCII character, 0-9, a - z or A - Z, case sensitive. Default ID = 0 OS = Operating system, 100 ...
  • Page 57 User Guide LINE 2 S WA h1 h2 h3 flags CR LF where S (1 character) = message status: 0 = No significant backscatter 1 = One cloud base detected 2 = Two cloud bases detected 3 = Three cloud bases detected 4 = Full obscuration determined but no cloud base detected 5 = Some obscuration detected but determined to be transparent / = Raw data input to algorithm missing or suspect...
  • Page 58 CS135 Ceilometer 0 to 8 Amount of lowest layer in oktas Vertical visibility only available No sky condition data available Insufficient data h1h1h1 (3 characters) = Height of the lowest cloud layer in 10s of metres or 100s of feet...
  • Page 59 User Guide "L0112HN15" (9 characters) = Reserved, defaults shown sum = Sum of detected and normalized backscatter, 0 ... 999. Not used in Operating System 1 CR LF = Carriage Return + Line Feed NOTE This line is omitted from message 111. LINE 5 SSSSSSSSSSSSSSSSSSSSSSSSSSSSS..(5 x 770 bytes) CR LF The two-way attenuated normalised backscatter profile...

  • Page 60: Ct25K Messages

    CS135 Ceilometer 6.4 CT25K Messages MESSAGE 113, CT25K Data Message No. 1 LINE 1 SOH CT ID OS 10 ETX CR LF where SOH = Start-of-Heading character CT = Always CT ID (1 character) = Unit number 0 ... 9, A ... Z (capitals only) Default ID = 0 OS (2 characters) = Operating system 00 ...
  • Page 61 User Guide If detection status is 4 h1 =   Vertical visibility as calculated If detection status is 0 or 5 h1 =   "/////" h2 (5 characters) = 2nd Height If detection status is 2 or 3 h2 = Second highest cloud base reported If detection status is 4 h2 =  ...
  • Page 62 CS135 Ceilometer LINE 3 ETX CR LF ETX = End-of-Text Character CR LF = Carriage Return + Line Feed...
  • Page 63 User Guide MESSAGE 114, CT25K Data Message No. 6 (available in future OS) LINE 1 SOH CT ID OS 10 ETX CR LF where SOH = Start-of-Heading character CT = Always CT ID (1 character) = Unit number 0 ... 9, A ... Z (capitals only) Default ID = 0 OS (2 characters) = Operating system 00 ...
  • Page 64 CS135 Ceilometer If detection status is 2 or 3 h2 = Second highest cloud base reported If detection status is 4 h2 =   Height of highest signal detected If detection status is 0, 1 or 5 h2 =  ...

  • Page 65: Section 7. Maintenance

    This will vary depending on the site location. The CS135 is capable of self diagnosing dirty lenses and will indicate in its output when the lenses are contaminated.

  • Page 66: Removing The Cover

    The cover contains a flying lead used to take power to the CAUTION hood heater and blower. Be careful not to trap and damage this when lifting the cover clear. Removing the cover reveals two carrying handles that allow the CS135 to be moved easily.

  • Page 67: Removing The Enclosure Lid

    The unit will still be powered by the battery even if the mains is disconnected. NOTE Do not use any grease or oil on any seals including the enclosure lid gasket. The silicone rubber seals used throughout the CS135 can be damaged by some mineral oils.

  • Page 68: Diagnostic Led Indicators Within The Enclosure

    CS135 Ceilometer 7.5 Diagnostic LED Indicators Within the Enclosure Two green LEDs labelled "LASER ON" and "STATUS" are visible on the DSP (see Fig 7.3). Their function is as follows:- "LASER ON" LED:- Off = laser off Flashing = laser fault On = laser on "STATUS"...

  • Page 69: Electrical Safety Testing

    User Guide 7.6 Electrical Safety Testing NOTE If carrying out insulation tests do not use voltages above 300V RMS as the mains input has devices that effectively short circuit any voltages above this level.
  • Page 70 CAMPBELL SCIENTIFIC COMPANIES Campbell Scientific, Inc. (CSI) 815 West 1800 North Logan, Utah 84321 UNITED STATES • www.campbellsci.com info@campbellsci.com Campbell Scientific Africa Pty. Ltd. (CSAf) PO Box 2450 Somerset West 7129 SOUTH AFRICA • www.csafrica.co.za sales@csafrica.co.za Campbell Scientific Australia Pty. Ltd. (CSA)

Table of Contents