Hi,

On the DT800, I have attached a rain gauge which produces a pulse for every 0.2mm of rain. Attaching the rain gauge to Counter C1 & logging continuously,

I use up all the internal memory very fast. What should I change in the way the counter/ rain gauge is setup to use less memory? Going at this rate even a sizable ext memory card will not be enough for logging rainfall data for 1 month?

Thanks D.

Good morning,

Slow down the speed of logging.
The counter is 32 bit will keep counting up to 4,294,967,296 before rolling over. Most weather station only log data every 6 minutes.

Cheers,
Roger

Yes and another question...

In the manual page 157 (version UM-0068-A2) I read:
counters 1 - 6 are 4 bit (roll over every 16 counts)
counters 7 - 8 are 12 bit (roll over every 4096 counts)
counters 9 - 16 are 32 bit (roll over every 2^32 counts)

But when I try counting on channel 1 I can count over 16 counts. What's the truth for every channel?

Regards,
Gerben

Good morning Bakker,

The counters 1 to 6 have hardware that is 4 bit deep (16 count) while 7 & 8 have hardware that is 12 bits deep (4096 counts). If the logger is in sleep mode the unit needs to wake up in order to catch the roll over an update the software counters.

Counters 7 & 8 allow the logger to sleep for longer because the hardware will count while the logger is in sleep mode. Counters 9-16 are in software only so sleep mode won't work as well.

Cheers,
Roger