Thanks Andy,
That doesn't appear to work. If I set the scale to match that of the
primary axis then the data doesn't show up at all. if I use a smaller scale
such as 1-12, then the data displayed is irrelevant. What I really need is
the ability to show an occasional label on the Series C (bean temp)
indicating gas pressure at that time & temp point. The secondary axis
doesn't "track" with the series C.
Thanks,
David
"Andy Pope" wrote in message
...
Hi,
Can you not plot the Gas pressure on the secondary Y axis. Double click
the data series based on column E and on the Axis tab of the Format dialog
pick Secondary axis.
Cheers
Andy
DavidJ726 wrote:
I'm using a line chart that has 5 columns and 100's of rows to display
time and temperature for a coffee roaster. Time & temp data is measured
by digital probes (etc.), which is imported into a spreadsheet. There's
a temperature reading for every second so I can end up with up to a 1000
rows of data for a 16-17 minute roast.
The Y axis is Temperature. The minimum value is 150 degrees with a
maximum of 475 and has a 25 degree scale.
Column A is where I enter a value of 00:00, 00:30, 1:00, 1:30, etc... up
to 17 and this is used for the X axis labels. Column B (Series A) is
where I'll enter a dozen or more temperatures along the time line and is
used to display a desired profile. Columns C & D is the imported data
showing bean (Series B) and ambient (Series C) temperatures in the drum.
During the roast, temperatures are monitored and gas pressure is
regulated to increase or decrease the heat. The reading on the pressure
gauge is what I need to show along the Series B line so I can observe the
effects of the gas adjustments to the roast. The values I'm recording
range anywhere from 1 - 12 and are entered into column E at whatever
point in time the adjustment was made.
I can't plot it as a series because the values are to small for the Y
axis, and text boxes would be to labor intensive. Is this possible?
Thanks,
David
--
Andy Pope, Microsoft MVP - Excel
http://www.andypope.info