seriesByTag not returning any data

Hi folks

I’m having trouble getting seriesByTag to produce anything.

I’m using Telegraf to send data to Hosted Metrics (Graphite), as per the following Telegraf config:

[[outputs.graphite]]
servers=[“REMOVED”]
prefix=“telegraf”
template=“host.tags.measurement.field”
timeout=2
graphite_tag_support=true

In Grafana, using the query editor, I can see that tag support is working, and I can graph accordingly; see the screenshot.

If I now try to use seriesByTag, I get nothing.

I assume I’m fundamentally misunderstanding how to use seriesByTag, but from the different examples I’ve looked at, I’m at amiss for what I’ve got wrong.

Can anyone spot my mistake?

Cheers
Andy