Yokogawa DR240 - Manual (Page 30)

Functions
2-9 IM DR231-01E
2
Recording Colors
The color of trend recordings can be selected per channel. The colors which can be selected are
black, purple, red-purple, navy blue, red, blue, brown, green, orange and yellowish green.
The recording color of the numerical values in the logging mode is purple only.
Recording Interval
The time during which one scan of trend recording or numerical printout is carried out is called
the recording interval.
Recording interval for trend recording
This recording interval can be selected from AUTO or FIX.
• AUTO
The recording interval is decided automatically depending on the measurement (scan) interval
and chart speed in order prevent the dots from overlapping. However, in cases where this
calculation would render the recording interval smaller than the scan interval, the recording
interval will equal the scan interval.
Recording interval = Scan interval
×
N
where N is an integer satisfying N
≤
720 / (scan interval
× chart speed). 720 is fixed.
Example: when scan interval is 2s; chart speed is 100mm/h
then N
≤
720 / (2
× 100) = 3.6
The closest matching integer is 3.
Accordingly, the recording interval becomes 2
× 3 = 6s.
• FIX
Recording is carried out at an interval which is the same as the scan interval (2 to 60s)
regardless of the chart speed.
Recording interval for digital printouts
This recording interval can be selected from MULTIPLE or SINGLE
• MULTIPLE
Six preset recording intervals (Timer 1 to 6) can be set and a recording interval can be selected
per channel. The timer setting can be selected from relative and absolute.
• Relative time: Time will be counted from the point of turning the power switch ON or of
resetting the timer. Each time the preset length of time is reached (and thus when time is
up), recording will start.
• Absolute time: A reference time is set, and from that time recording will start at preset time
intervals (each time when time is up).
• SINGLE
The logging interval is decided automatically depending on the chart speed and the number of
columns for digital printouts.
Recording interval in logging mode
This recording interval can be selected from MULTIPLE or SINGLE
• MULTIPLE
Same as for the analog trend mode
• SINGLE
From the above mentioned six preset recording intervals, the interval set as Timer 1 will
become the recording interval.
Resetting the Recording Interval (Timer Reset)
This function will reset the elapsed time of the above mentioned MULTIPLE recording interval to
zero. Usually recording will start according to the recording intervals, but when you reset the
elapsed time using this function, the results are the same as for time-up.
2.3 Recording Functions