Yokogawa Button Operated MV2000 - Manual (Page 23)

1-16 M-4660
Historical Trend
The MV can display the waveforms of past measured data (display or event data) stored
in internal or external memory. This function is called historical trend.
• Historical Trend Display Options
There are five ways that you can display measured data stored in internal memory:
• From the alarm summary display.
See section 5.7.
• From the message summary display. See section 5.8.
• From the memory summary display.
See section 5.9.
• From the display selection menu. See section 5.3.
• By pressing HISTORY.
You can also display measured data stored to external memory. See section 4.8.
• Display Contents
Cursor
Message
Measured values (maximum and minimum
values for the entire display*)
Measured values (maximum and minimum
values at the cursor position*)
* You can also just display the digital values at the cursor position.
Waveform (channel display color) Background
color ( Changeable)
Location of the most recent data
Date and time at the left end of the time axis**
Trip line
Date and time at the right end of the time axis** or the
time at the cursor position
(The time at the cursor position is surrounded by a yellow square.)
** You can also set this area to display the time relative to the start of recording.
Unit
Tag name or channel number
(channel display color)
Historical trend
Present trend
Half screen display
Item Description
Alarm summary Displays a summary of the displayed data’s alarms.
Message summary Displays a summary of the displayed data’s messages.
Memory summary Displays the properties (file name, sample start time, end time,
etc.) of the displayed data.
• Add Message
You can enter added messages.
For operating instructions, see section 6.4.
1.4 Display