[DJ88]

I'd love to have automatic uninterrupted logging of data. But it's all the extra expenses. I am incurring a lot of them for this right now. Ballasts alone will hit almost $500.00 or more. [img]images/smiles/icon_eek.gif[/img] So far its $200.00 on light meters. [img]images/smiles/icon_sad.gif[/img]

If I could set up something to measure and record mV on my PC I'd be laughing. It's that damned cost again. A rough guesstimate for exchange $Cdn to £ is 2.2. So for a £120 board I am looking at $300.00 once shipping is included. If not more. Then there is duties and taxes. Grrrrrrrrr.

Tho I may talk to the head of my program at BCIT and see if he can get me an interface card somehow. They hav eto exist. It is BCIT after all. All I need is one to measure mV.. all I need.. Then I could run it 24/7 over a couple of weeks and we could see a graphical log of the output decay in PAR for each ballast. Set up a sealed enclosure with one lamp inside and the PAR meter attached inside. Fan for cooling and circulation and you can do 30 days of testing in 1/2 the time. All with some pretty sweet graphs showing the decay.

Hmm.. damn.. more ideas..

Thanks Titus. [img]images/smiles/icon_wink.gif[/img] [img]images/smiles/icon_eek.gif[/img]

Still looking for a Fluke 41 tho. Be nice to measure the wattage with only one meter. [img]images/smiles/icon_wink.gif[/img]

You know. Even if I was only able to get a board made to measure higer voltages and not accurate with the mV, it would be a snap to make up an amlification board the PAR sensor feeds into then the board sends the amplified signal to an interface card for logging. Then it is the software. grrrr..

I do have an extra PC here I could set up to run the collection software only. Hmm..

TITUS! Why'd ya have to bring this up! lol

Just took a closer look at the Data logger Titus.. It is only accurate down to 5mV. I need to 1mV to be accurate. The sensor is accurate to 1mV = µmol m^-2 s^-1. Plus it only measures to 5V. Sigh.

Grrr.. double Grrrrr hmm amplifier.. sigh.. I gotta try n sleep now.. Not gonna happen.

[ 22 February 2002: Message edited by: DJ88 ]</p>