1) Create log file and open newly created log file in Trends. 2) On the trends tool bar click on the “add line” icon or select edit in the main menu & click “add line”.

3) Click on the down arrow underneath “Source” to choose the type of Channel you want to trend. Then underneath “Channel” click the down arrow select the exact channel you want to trend. Choose your line colour, we have chosen red for this example. For the first channel you are adding leave the default number “1” that appears in the white space beside “Track”. Click Add. Repeat these steps to add 5 channels, except when you’re adding the second channel you enter the number 2 in the space beside “Track”, and number 3 for the third channel and so on. Then close “Add Line to Trend” Window

You can now see the 5 trend lines representing 5 channel values appearing individually in 5 tracks.

4) Click the “Options” icon on the trends tool bar or select “edit” in the main menu & click “trend options”.

5) Select the tracks tab. To display logged text within a specific track, click the logged text box beside the corresponding track numbers of your choice. (We have already defined the track numbers in “Step 3”) To display an Axis click the box below “Axis” along the same line as the corresponding track number of your choice. Next two options appear “Axis Display” and “Axis Position” which both have a drop down menu.

• Axis Display – gives you the option of displaying the default horizontal time scale or creating a scale, based on channel values, which compresses or expands a trend horizontally or vertically (depending on trend orientation), based on your selected channel’s maximum value. (A Channel which we have not defined yet) This is known as an X-Y graph where multiple Y channels can be plotted against one X channel.
• Axis Position – gives you the option to place either scale at the top or bottom of the track.

6) The selected time scales have appeared in the tracks below, because by default this is a time based trend, so none of the channel based scales have appeared.

7) Open “Trend Options” again and select the “Trends” tab. You can see that “Time Based” is already selected. The time based options allow you to

• Enable the “Time Scroll Bar”- for scrolling across trends
• Gives you the choice of an “Initial Time Frame” which can display time scales based on a quarter of a second up to 4 years
• Choice of
  • Absolute time : the actual real time
  • Elapsed time: the time that has elapsed from the beginning of the trend

8) Once finished experimenting with time based trends, select “Channel based” under “Trend Type”. Click “Change…”.

9) Select a channel on which you want the rest of Channels to plot against.

10) You will notice in the next few trends, the compression and expansion of the trend corresponding to the selected channel’s maximum value. You will also notice the scales are no longer time based, but based on the channels values. Channnel Al1 maximum value is 1, therefore all trends are compressed to 1.

Channnel Al2 maximum value is 5.

Channnel Al3 maximum value is 10.

Channnel Al3 maximum value is 100. Channnel Al2 maximum value is 1000, therefore all the trends are expanded to 1000.