Null Plug

[capri]

When calibration the Redox Sensor you have to insert the Null Plug. What is the Null Plug?

[capri]

Found it. It's a small plug that was included in the P3 upgrade kit.

[hemoi]

Hi,
I have a 50ohm BNC terminator plug. Can i use this as the NULL Plug.

[Wirus]

I have a 50ohm BNC terminator plug. Can i use this as the NULL Plug.

If you wanna have accurate results: No. The original plug is short circuited - see also http://www.aquariumcomputer.com/Forum/showthread.php?2731-Redox-null-plug&p=16243

[hemoi]

Thanks Wirus,
As a test, I made a null connector as described in the post. It looks like the 50ohm terminator creates enough of a short.
My adc1 was the same (427) with both the shorted connector and the terminator.