Zoom to domain with intervals

[Alex]

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I'm using d3 to build a chart with data I get from a mysql database. I was working with this example:https://bl.ocks.org/mbostock/431a331294d2b5ddd33f947cf4c81319. You can see my code in Plunker: http://plnkr.co/edit/HvypuHsrqPSDIcEOiFS0. I would like that my chart show me the last 8 hours when the chart is load, and then, be able to make zoom or move the chart. I was working in this piece of code: var d0 = new Date(2003, 1, 5), d1 = new Date(2003, 2, 10); I was working for d1 show the actual date, and d0 8 hours less, with one idea from a question in stackoverflow: var d = new Date(); var d0 = d3.time.hour.offset(d, -8); var d1 = new Date(); But the chart keep freezed, without transition or zoom capacity. I think is a problem about time format (I got this data: {"Time":"2017-03-12 22:40:23","Probe1":"20.10"}). I was looking for information about intervals, zoom behaviour or offset features, but I can't find a solution. Any idea? Thanks! Alex.