Yokogawa DR240 - Manual (Page 185)

11-9 IM DR231-01E
Saving/Reading Measured, Computed and Set-up Data
11
Measured/computed data is read from the internal RAM disk.
Reading methods (READ MODE)
The following two methods are available.
• DIRECT
Data is read at the measurement intervals immediately after setting has been completed.
• TRIGGER
The event/action function is used to read data at the measurement intervals when an event takes
place. This function is useful when you want to compare data before an event with data after
an event.
Displaying the contents of the file
The following information of the read file is displayed.
>MODEL=STAND-ALONE
>SAMPLE= 10(Sec) TRIG DATA No.= 1
>96/07/07 00:00:00 LENGTH=20000
>CHANNEL=001-60
>ON 001
>ON 031
Model type on which data was saved
Number of pieces of data per channel
Data No. in effect when the trigger (event) took place
Always "1" if saving was carried out without DIRECT
or PRE TRIGGER settings made.
Date/time on which a trigger (event) took place
Saving start date/time in the case where saving was carried out in DIRECT mode
Sample rate (intervals at which data was saved)
Status of channel Nos. 001 to 030 ( : Data available, : No data available)
0: measured data; A: computed data
ENTER key
Displaying/recording the read data
To display or record the read data, it is necessary to assign the read data to computation channels
A01 to A30 using the SET menu. To view or record read data, you must set the data you want
displayed on a computation channel (for example, set CALC=M001 on A01) to make
computations. To make computations, select "MATH START" from the menu shown either by a
momentary press or a 3-second press of the FUNC key, depending on the settings given in
Section 10.8, "Setting FUNC/FUNC3 Menu." See Section 12.2, "Setting a Computation
Equation," and Section 12.4, "Starting/Stopping Computation," for more information. This
assignment is still possible even if the instrument is not equipped with the optional computation
function.
Assign the following channels to computation channels A01 to A30.
• M001 to M030 (M001 to M020 for the DR130): Read data for measurement channels
• MA01 to MA30: Read data for computation channels
If the instrument is equipped with the computation function (/M1 model), read data can be
calculated in the same way that measured/computed data is calculated.
Like measurement channels, it is possible to make the unit, alarm, zone, partial compression, tag,
linear interpolation, dot color and recording settings for computation channels A01 to A30.
However, only the upper-limit and lower-limit alarms are available. Specify channel Nos. A01 to
A30 when specifying channel Nos.
11.2 Reading Measured and Computed Data