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Questions & Answers
I am not sure what you are trying to do but I did find a manual at http://www.knacro.com/knacro-ptr4-sp-controller-4-way-programmable-time-relay-dc-6-40v-99-groups-time/ it is lacking some details but the best that I could find and it might offer what you are looking for. It is a nice timer after you figure it out.
By Andrew Flemming on March 21, 2018
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based on 2 Customer Reviews
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October 17, 2017
I bought this to run 4 perastaltic pumps to automatically measure my nutrients for me in a hydroponic system. The ratios of my nutrients all have a common denominator of 15 seconds of run time. I just set the total number of loops on each channel based on the ratios needed. No more graduated cylinders required, just push the start button and walk away. I have not figured out how to make the inputs work yet. I can't find a manual for this thing so I kind of have to guess how things work so it lost a star. If you try to look it up this is the ptr4-ind not the ptr4-sp. I don't know why it is so hard for vendors to include a link to the manual in the description. Who knows, maybe someday people that sell electronic devices will realize we live in the information age. The manufacturer could even reference a web address on the part itself. Probably makes too much sense
August 31, 2017
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