ANACON: How does the connection and installation of the Analog Transmitter ANACON work?
In this short video we show you how to connect and install the Lufft Analog Transmitter ANACON:Show FAQ
CHM 15k: Can the CHM15k be operated, restarted or deactivated remotely?
The CHM15k can be configured, restarted and shut down conveniently and password protected via the RS485 interface as well as via LAN/WAN and web interface.
Both the firmware and the operating system are restarted via 'restart system'.
Via 'shutdown system' the complete system is shut down and must be switched on again for a restart on site. Please take this into account, especially if the device is not installed in the immediate vicinity.
Please find a detailed description of the functionality in the manual.
CHM 15k: Can the status of the NTP query (time server) be verified?
As of firmware version 1.020, the web interface / page "Process Status" displays the server name, status of availability, current time offset, query interval, etc.
Note: If the time delay is more than 1000 s (approx. 17 minutes), the time must be set manually via the web interface or the device must be restarted. If the NTP server can be reached, the time is immediately reset and not iteratively adjusted.
CHM 15k: Does the device have a window contamination control?
Depending on the degree of soiling of the windows, a corresponding NetCDF variable (state_optics) is reduced from its original value of 100. A warning is issued when a certain limit value (70) is reached and the status code of the device is changed. This can be used as a recommendation for cleaning the windows.Show FAQ
CHM 15k: How should the CHM15k be installed in relation to the sun?
The case side with the door should face south, especially if the CHM15k is tilted due to steep sunlight (usually towards north).
This applies to the northern hemisphere. For the southern hemisphere, the opposite directions apply.
Please note that at an angle of solar radiation < 15° to the vertical, the device must be tilted in order to protect it against extreme solar radiation. We offer an angle adapter as an accessory for this purpose. Please feel free to contact us about this topic.
CHM 15k: How to find/choose correct firmware version corresponding to your hardware version
A new firmware version for the CHM 15k comes in two hardware-dependent variants:
- Firmware version 0.xxx_550 (e.g. 0.743_550)
- Firmware Version 0.xxx_552 (e.g. 0.743_552)
The version 0.735_552 and all subsequent versions X.XXX_552 apply to newer CHM 15k devices which have been built since June, 2015. From the installed firmware version 0.733 on, you can find the right update version through on the CHM web interface.
For devices with firmware versions before 0.733, you can recognize the compatibility by means of the OS version (web interface --> device tab "firmware"):
For OS: 12.12.1 please use the firmware version 0.735_550 and for OS: 15.06.1 the firmware version 0.735_552.
If you have uploaded the wrong version accidentially, the status bit 12 is set. You can install the appropriate version again.
You can find the new firmware in the download area of the CHM 15k product page.Show FAQ
CHM 15k: In which applications is the ceilometer CHM15k in use?
The View into the Sky - Applications with the Cloud Height Sensor CHM15k! Watch our webinar recording where we present completely different application scenarios, where our cloud height sensor CHM15k can be the sensor of your choice!Show FAQ
CHM 15k: Is it possible to get the device-specific overlap data for own calculations?
The overlap data corresponding to your device can be sent to you in the form of a file. Please contact us at service@Lufft.comShow FAQ
CHM 15k: On-site calibration & on-site check of the calibration - How to do? How often to do?
Lufft is offering a cloud simulator tool to check the instrument quality in field.
The simulator generates different light pulses and background light levels to test the detection unit and the data acquistion path of our CHM units. The starting point is the laser itself. The laser pulse is detected by the simualtor and time shifted LED pulses are generated. By comparision with the instrument specific production protocol the user can easily see differences in the calibration. The simulator takes a test time of 30 minutes in maximum and should be repeated once per year to verify the status of the system.
In case the instrument is showing an error or the results of the simulator are out of specs, the LOM (laser optic module) of the CHM instrument shall be exchanged. It can be repaired and recalibrated in lab.
Furthermore, on-site calibration in field can be done to achieve absolute backscatter values from aerosol layers. The absolute calibration can be done in two different ways:
1) comparision with another lidar instrument, which should have a sensitivity 10 times better than the ceilometer and should have at least the same range resolution of 5m.
2) clear sky calibration and specific rain cloud calibration ( both methods will be implented by the European Met services shortly. There is an ongoing project to deliver the algorithms. Please check:
Advantage: The Rayleigh calibration and the cloud calibration method do not need additional equipment.
The on-site calibration takes 24 h to 1 week to be able to compare different cloud and aerosol layer situations. In a rainy season, in permanent low cloud, brown cloud or in foggy places the on-site atmospheric calibration might not work at all and our cloud simulator check of the lab calibration gives you the best result.Show FAQ
CHM 15k: What are the maximum cable lengths for the CHM15k?
A 50 m version can be offered. For longer lengths (e.g. 100 m) we recommend to use the standard version with 10 m and e.g. to extend the mains cable with sufficient cable cross-section (e.g. >= 2.5 mm²) via an installation box near the device.
The data cables for LAN and RS485 are to be selected in shielded and twisted version. We do not recommend LAN cables >100 m without appropriate amplifier elements (e.g. Extender). RS485 cable lengths up to 500 m are possible with appropriate cable quality. Data connections >1km are also possible through the use of DSL modems.
For sufficient lightning protection, the grounding cable should always be connected in the immediate proximity of the device.
Please contact us if you have any further questions or you are interested in a quotation.
CHM 15k: What is the minimum distance between two devices in order to prevent mutual interference of the backscatter signals?
A distance of 50 cm between the instruments is sufficient, provided that the levelling screws in the base of the instrument ensure a mutual tilting of 0.5°.Show FAQ
DACON8: How does the connection and installation of the Digital-Analog-Transmitter DACON8 work?
In this short video we show you how to connect and install the Digital-Analog-Transmitter DACON8:Show FAQ
IRS31Pro/ARS31Pro: How to install a Lufft Road Sensor?
In this Training Video, our service technician Jim Latimer explains, how to install Lufft Road Sensors.Show FAQ
MARWIS CloudGate: How do I setup the MARWIS CloudGate box?
In a short tutorial our technician Manuel Kreissig shows you which first steps you have to take to setup the CloudGate box (SIM card insert and wiring).Show FAQ
MARWIS: How large is the measuring spot?
The measuring spot of the mobile sensor is approx. 10cm x 10cm in the specified distance. This applies to both the 1m and the 2m version.
If the distance deviates from this, the measuring spot becomes correspondingly larger (with larger distance) or smaller (with smaller distance).
However, it should also be noted that the area of the transmitter and the receiver move further and further apart, as the MARWIS "squints" a little.
MARWIS: What are the first steps to use MARWIS?
In this short movie our service expert Manuel Kreissig shows you the first steps to install and run the mobile road sensor MARWIS with your car.
To the MARWIS Tutorial: From installation to start-up
OPUS20 and SmartGraph3: How to work with SmartGraph3 Monitoring Software?
In the tutorial video we answer many questions from first steps with OPUS20 and SmartGraph3 to different configuration options:
- Installation SmartGraph 3 (03:18 min)
- Software settings (05:05 min)
- Manage devices (07:21 min)
- Diagram view settings (10:22 min)
- data export (14:25 min)
- print function (15:15 min)
- Software- and firmware-update (16:58 min)
To the Tutorial Video:Show FAQ
OPUS20 and SmartGraph3: Is SmartGraph3 (min. V3.2.0) compatible to Windows7/10?
Yes, SmartGraph3 was tested under Windows 7 & Windows 10 and no problems were found.Show FAQ
OPUS20: How can the data be recorded in the internal memory of the OPUS20?
The OPUS20 must be configured in Mode M3 REC or M4 REC Hide. This can be done using the configuration button on the back of the OPUS20.Show FAQ
OPUS20: Is ethernet communication available for all OPUS20 versions?
Yes, the etherent interface is a part of all OPUS20 instruments, so all of them cam be connected to the network (LAN)Show FAQ
OPUS20: What are the eletrical specifications for the PoE version of the OPUS20 device?
The OPUS20 PoE version uses a voltage level of 48V and the lowest current levelShow FAQ
OPUS20E: How to configure the OPUS20E datalogger?
In this video tutorial we lead you trough all the important points from installation to configuration:
- Description of OPUS20E data logger
- Configuration of external sensors without PC
- Configuration via SmartGraph3 software
- Answers to general questions
To the tutorial video:Show FAQ
SHM 30: How can I avoid that the sensor will be covered with snow (affected by very strong winds)?
A special tube may be added.
- Front: 70mm
- Middle: 100 mm
- End: 50mm (connection to the sensor)
An extra Lufft accessory is planned for the futureShow FAQ
SHM 30: How to defrost a frozen sensor
You can fix a heater mat on the metal tube, e.g. with 10W power. This would also be the best way to defrost the window of the sensor. Hot water on a frozen window can lead to a serious damage and shall be avoided.Show FAQ
SHM 30: What is the life time of the sensor?
Laser Diode Module (LDM) is the most critical part Expected life time:
- >45,000 h (limited to laser diode MTBF; 4-5 years; runs normal between 100 000 to 200 000 hours)
- MTBF: 45,000 h
SHM31: How long would the sensor need to be on in order to be stabilized and to record proper data? Can the sensor be switched off for long periods of time?
Yes it can be switched off for a longer time. There is a defrost mode that can be activated by default, if the sensor is switched on in very cold environments. It can take 2 minutes or 10-15 minutes to wake up the sensor, depending whether the outer conditions are very cold (-40°C ) or moderate (-10°C).Show FAQ
SHM31: If operating under SDI-12 communication protocol: Can the heater be turned on and off remotely using the SDI-12 command?
The heaters can be activated/deactivated also with SDI-12. Additionally the heaters could be deactivated with a voltage level at the red 3-pin (configurable).Show FAQ
SHM31: Is it possible to measure water or ice with SHM31?
The SHM31 is mainly designed to measure the snow depth. The measuring principle is not applicable to measure pure ice or water due to strong reflections or translucency. For ice and water on roads please view also our road sensors like NIRS31, MARWIS/StaRWIS and ARS/IRS31Pro.Show FAQ
SHM31: What are the specific limitations of using the sensor on 12V?
There are no limitations. But current will be bit higher to get the same heating power as with 24V.Show FAQ
SHM31: What is the minimum operating temperature of the sensor with the heaters turned off? At what temperature would it be necessary to turn the heaters on? How would turning the heater off affect the overall measurements of the sensor?
The sensor can operate without heater until -10°C outer temperature without heater. Turning the heater off above -10°C would first of all not affect the measurement, but the outer window might get opaque due to condensation/ freezing after a while.Show FAQ
SHM31: What type of current draw does the heater have at 12 V (with and without the heater)?
The power consumption at 12 VDC is roughly: 2.5 W if only the window heater is enabled and 18 W with window and main heater switched on.
SmartView3: How to install and configure the SmartView3 Software?
In this tutorial videos we show you how to install and configure the SmartView3 management solution:Show FAQ
ViewMondo: How to work with ViewMondo Road Weather Management Software
In this short software training we show you all important functions of the ViewMondo road weather management software. It is suitable for both fixed and mobile road weather stations. Watch this video and see how user-friendly it is.Show FAQ
WS product family: Communication after protocol change
How to communicate with a WS-Sensor and the UMB-config-Tool if the protocol was changed for example to Modbus or SDI-12?
After a Reset ( switching On/Off the sensor) every WS-Senor will start up for the first 5 seconds in UMB-protocol and the standard baud rate of 19200Bd. Independend to the configured protocol and baudrate settings of the WS-Sensor.
In this first 5 Seconds you will be able to connect via UMB-config-Tool to the WS-Sensor after this first command was send the UMB-protocol will stay for 10 minutes after that it switches back to the original configured protocol. This Time will always be extended to 10 minutes if a new UMB command was send.Show FAQ
WS product family: SDI-12 wiring plan for Device version >= 42
How to connect a WS-sensor with a device version >= 42 (hardware version >=14) to a SDI-12 system?
The wiring plan has changed compared to the wiring plan of older WS-Sensor device versions.
The new wiring plan is:
- +VDD = brown
- GND = white
- SDI12_Signal = yellow
- SDI12_GND = white
This is also mentioned as a note in the latest WS-sensor manual in the section 8 ConnectionsShow FAQ
WS100: How does the Doppler Radar Measurement Principle of the WS100 work?
The 24 GHz Microwave Doppler Radar works with the radar reflection method and measures the precipitation quantity or precipitation intensity by means of the correlation of drop size and velocity below the sensor.
Inside the the smart sensor a drop Size distribution matrix enables to calculate intensity of precipitation and to determine type of precipitation according fundamental meteorological relationships (Gunn-Kinzer and Hobbs and Locatelli).
More to read about the measurement principle in the WS100 Sensor Guide:Show FAQ
WS800: What is the max. radius a lighting can be detected from the WS800?
The WS800 uses a integrated electronic chip to detect the lighting. The max. radius of this detection is approximately 10 Km.Show FAQ
XA1000: Is it possible to calibrate temperature and humidity if I use the handheld device XA1000?
Yes, with the firmware version V1.9 or higher a calibration of the temperature and humidity is possible. You will be able to do a one point calibration (offset) directly in the handheld device XA1000.Show FAQ