Hi,
I'm realively new to working with campbell dataloggers. We've been operating a Thies DLx based Station for quite a while, but the Logger itself is running out of options.
We are planning to swap out the logger for a CR350Cell, which we already have. I am using Short-Cut to setup the program but was only able to find one Sensor listed.
1. The Kipp & Zonen CSD 3 sunshine duration sensor is listed, but only for the duration output of 0 or 1 Volt. It also outputs the estimated direct radiation - how would this be measured, via a single-ended Voltage with "VoltSE" - likely in the range of 0 - 2.5 V with the scaling updated to match 1 mV == 1 W/m²? How can I get short-cut to ouput a wiring suggestion for this?
2. The barometric pressure is using a Thies 3.1157.10.000 which outputs the the pressure between 800 hPa and 1060 hPa as 0 - 5 V - the CR350 only supports 0 - 2.5 V - is ther any way to measure 0 - 5 V ? Or would I have to divide the voltage using two resistors? Would this even be accurate?
3. For the Windspeed and Winddirection we're using a Thies Combined Wind Transmitter (4.2226.22.000) which, for the windspeed, outputs pules/a frequency between 3 to 1042 Hz without an offset which is equivalent to 0.3 - 50 m/s. For the winddirection is uses some 8-bit serial synchronous interface over two wires. This I don't quiete understand how it works.
4. firstly in addition, ultimately as an replacement we're planning to connect a Gill Windmaster 3D ultrasonic anemometer to the logger its data output seems to be via serial (RS323 or RS485) only, no SDI12 or analogue outputs. Would that also work with the CR350?
If the CR350 is not suitable for this application what will be needed to operate those sensors?
Hopefully someone can provide me with some information and guidance on how to set this up correctly.
cheers
Jonas
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Hi, below are my suggestions in your text.
1. The Kipp & Zonen CSD 3 sunshine duration sensor is listed, but only for the duration output of 0 or 1 Volt. It also outputs the estimated direct radiation - how would this be measured, via a single-ended Voltage with "VoltSE" - likely in the range of 0 - 2.5 V with the scaling updated to match 1 mV == 1 W/m²? How can I get short-cut to ouput a wiring suggestion for this?
- in shortcut you can choose a generic single ended voltage measurement using mult 1 and offset 0
2. The barometric pressure is using a Thies 3.1157.10.000 which outputs the the pressure between 800 hPa and 1060 hPa as 0 - 5 V - the CR350 only supports 0 - 2.5 V - is ther any way to measure 0 - 5 V ? Or would I have to divide the voltage using two resistors? Would this even be accurate?
- First of all, as you say, you need to split the output signal in half. CS has special dividers in the catalog, or use two identical and precise resistors of at least 10K to split the signal exactly in half. If it's not perfect, you can make adjustments with the multimeter. in shortcut you can choose a generic single ended voltage measurement using mult 0,104 and offset +800
3. For the Windspeed and Winddirection we're using a Thies Combined Wind Transmitter (4.2226.22.000) which, for the windspeed, outputs pules/a frequency between 3 to 1042 Hz without an offset which is equivalent to 0.3 - 50 m/s. For the winddirection is uses some 8-bit serial synchronous interface over two wires. This I don't quiete understand how it works.
- always in generic measurements you can choose Pulse High Frequency for the anemometer and with mlt (1042-3)/(50-3) and offset of 0,3. Unfortunately, the solution for the wind direction does not seem immediate; it will be necessary to do some tests and read various articles, posts and examples on the CS website.
4. firstly in addition, ultimately as an replacement we're planning to connect a Gill Windmaster 3D ultrasonic anemometer to the logger its data output seems to be via serial (RS323 or RS485) only, no SDI12 or analogue outputs. Would that also work with the CR350?
Using the Modbus protocol and the RS232 or RS485 connection, you can connect the Gill 3D. Use CRbasic to modify the program obtained with SHORTCUT, with more complex functions.
If the CR350 is not suitable for this application what will be needed to operate those sensors?
- If you don't need to add many more sensors, another CS logger model, like CR1000Xe or CR6 I don't think they can help you, I'm almost sure that the CR350 has the ability to measure what you listed, you just need to look for more information, examples and do tests for the 8 bit direction or the modbus for the Gill
Smile