Keep alive current too high

[scoltharp]

I have discovered that my keep alive current on my D100 is running about 200ma. I had a 1amp fuse in line and it had blown. To see why, I checked the current and discovered it at a steady 200ma(still does not explain the 1amp fuse blowing). Next I found that if I disconnected and reconnected the keep alive voltage it would run around 1-2ma until I turned on the D100 and then turned it off, at that point it would go back to the 200ma draw. If I turn off the D100 with the D100 button and leave 12v applied to the panel it draws the 200ma through the main 12v wire on the D100 and the keep alive stays at 1-2ma until I take away the main 12 to the D100. So, in normal operation the keep alive draws about 200ma until I disconnect the keep alive and reconnect it.  I am pretty sure it was not originally this way. Any ideas?

Thanks --- Lynn Coltharp

 

[dynonsupport]

Lynn,
This is totally normal.

If you have no internal battery, It will draw 200ma for 2 minutes after you turn it off, or for two minutes after you attach keep alive.
If you have a battery, it will draw what it needs until the battery is charged.

Watch the line with you ammeter longer and you'll see it shut off in a few minutes. Each time you hook the ammeter up, you restart the timer.

 

[scoltharp]

dynon,

Thanks for the reply about the keep alive current. What you said makes sense. However --- now I am confused. Today I checked the current to see if if went down after 2 minutes. I got a completely different result today. It does not agree with what I had previously observed or what you said should happen. Now I get less than a milliamp draw and when I remove power from the D100 the keep alive shows a momentary spike in currrent for about 2 seconds(too fast to follow on a digital meter) and then settles back down to less than a milliamp. So --- today I could not duplicate my previous results and also could not confirm what you said should happen. There was no 200ma keep alive current unless it occurred during the 2 second spike when powered down.

I have replaced the 1 amp fuse with a 5 amp fuse since the 1 amp was blown again(actually the 1 amp fuse was a 1/2amp it is hard to read pico fuses).. Maybe I have an intermittent problem. Should I be concerned because it does not draw the 200ma for 2 minutes as you said was normal?

 

[dynonsupport]

Do you have an internal battery?

 

[scoltharp]

Sorry about that! No, I do not have an internal battery.

Thanks --- Lynn