Hybrid Recorder
DR230
Functions
Computing functions
The main unit of the DR230 with optional MATH feature can perform the four arithmetic operations, integration of measured data, and computations such as detection of maximum and minimum values, in realtime. Even without the optional feature, the DR230 can compute linear scaling, difference and moving average. The results of such computations are transferred with the measured data to a PC, thus reducing system requirements on the PC and also resulting in more efficient analytical processing.
The main computing functions are as follows. (The shortest computation period differs depending on the kind of computation).
- Standard computing functions
Linear scaling, moving average, differential calculation, pulse integration (when a pulse input module is recognized).
- Optional functions
The four arithmetic operations, logic operations, related operations, calculation of absolute and relative values, and statistical calculations (maximum, minimum, mean, and integrated values for fixed intervals)
- Moving average function
This function renews the measured value while calculating the moving average, is effectively monitoring the trend of a varying input signal over a long period. It is also useable as a digital filter when noise components are present on the input signal. You can set the number of moving average scans by selecting a value between 2 and 64.
- Batch integration
By using the DR230 in combination with the optional DI/DO module or alarm function, you can easily perform batch processing.
Report function
You can calculate the maximum, minimum, average values, and integrated value of the measured results, and print hourly, daily and monthly reports. The calculated values are also recorded in the report results.
Memory function
You can select a floppy disk function with 512 KB SRAM capability for storage of information on a removable media. You can save several configuration setups and in addition store the measured data before and after an alarm, and also calculated values.
You can record the memorized data on DR230 chart, transfer it off-line to a PC, or analyze it or make it into a report using commercially available spreadsheet software.
You can save the measured data in the following cases:
By manual command or when a communications command is input When an alarm is detected When the end of the chart is reached
Save modes
Single: Data of the specified length is sampled once only. Repeat: Data of the specified length is sampled exactly the number of times specified in advance.
* When measured values are saved to a floppy disk, they are first stored in the buffer memory (512 KB DRAM).
Other functions
| Function | Description | |
|---|---|---|
| Input | Integration mode selection | You can select the 50/60 Hz or 10 Hz integration mode. The 10 Hz integration mode is useful when power line noise containing both 50 Hz and 60 Hz components is superimposed on the signal. (When the 10 Hz integration mode is activated, the minimum measurement interval is 4 s.) |
| Low-pass filter | You can insert a low-pass filter in the path of a signal on which noise components are superimposed. (When the filter is ON, the minimum measurement period becomes more than 3 seconds, depending on the input types and channels.) | |
| Scaling | The input signal is displayed and/or recorded as an industrial quantity or a physical quantity. | |
| Burn-out | When the thermocouple input goes open circuit, the indicator moves to the 100% or 0% side. | |
| Differential calculation | The difference between the reference channel and measured channel is measured. | |
| Record | Zone recording | The recording area can be set freely for each channel. |
| Partially compressed and expanded recording | Unimportant parts are compressed, and only necessary parts are expanded, thus enabling the recording resolution to be increased. | |
| Group channel trend | Unimportant parts are compressed, and only necessary parts are expanded, thus enabling the recording resolution to be increased. | |
| Alarm generation channel trend | Trend recording takes place only for channels that emit an alarm. | |
| Setting | Memory backup | The set data is protected by a lithium battery inside the unit. |
| Security | The unit comes with a standard password lock function, preventing mis-operation and also protecting the set data. | |
| Alarm | Re-breakdown re-alarm | The alarm output can be refreshed when an alarm is emitted. |
| Hold function | Once an alarm is emitted, the alarm indication and relay state are held until the operator acknowledges the alarm. | |
| Switchover between excitation and non-excitation | The alarm mode can be switched between the alarm output relay excitation/non-excitation state. | |
