Vaisala MMT330 - Manual (Page 71)

Chapter 4 _________________________________________________________________ Operation
VAISALA ________________________________________________________________________ 69
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Press the ◄► arrow buttons move the cursor (vertical bar) along the
time axis. The cursor mode allows you to observe individual
measuring points. The numerical value at the cursor position is shown
at the left upper corner. The right upper corner shows the time from
the present to the chosen moment (without the logger module), or the
date and time at the cursor position (when the logger module is
installed).
- If the optional data logger module is installed, you can scroll the
cursor off the screen to move to a new point on the time axis. The new
date will be displayed, and the cursor will be centered at the date
where the cursor scrolled off the screen.
0706-030
Figure 42 Graphical Display with Data Logger
If the data logger module is installed, you can move quickly on the time
axis: zoom out, move the cursor, and zoom back in.
The time that is shown below the graph is adjusted with the current time
offset of the transmitter. If you change the transmitter's date and time
setting, the displayed timestamps in the history graph change
accordingly. For an explanation of the effect of changing the date and
time manually, see section Data Logger Module on page 63.
Table 12 Graph Information Messages in Cursor Mode
Message Interpretation
Power outage Power failure (marked also with dashed
vertical line)
No data Quantity has not been selected for the display
System error General device or power supply problem
T meas. error Temperature measurement/sensor failure
RH meas. error Humidity measurement/sensor failure
Adj. mode active Adjustment mode active (data recorded in the
adjustment mode is not displayed)
A question mark after time tells you that at least one power failure
(dashed vertical line) has occurred after the chosen moment. In this case,
the exact time difference between the present and the cursor position is
not exactly known. If the data logger module is installed, the time is
known and the question marks are not present.