Omega Engineering Paperless Recorder RD8900 ユーザーズマニュアル

 

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The Solid Compact Flash Memory Card (CF Card ) 16 MB capacity is a free standard storage 
media used for this instrument.  Its compact size, anti-dust and anti-vibration features increase 
its reliability.  To read measured data on CF Card, add a CF reader on USB port of PC.  Higher 
capacity 64 and 128MB CF Cards are upon request. Alternatively the user may purchase locally. 
To ensure compatibility, we recommended only two brands SanDisk and Transcend. 
 
To read the configuration and measured data on CF card for the first time, it is necessary to 
press Save key to save configuration, and then press Dump key to Dump measured data from 
the recorder to the CF card before inserting it into the CF card reader.  If configurations been 
changed afterwards, press both keys before insert CF card into reader.  If configuration remains 
unchanged, press Dump key only.  
 
Each record of data uses 2 bytes of CF card memory..  If the Log Speed ( the recording speed of 
measured data ) is set to the fastest speed at 1 second per data, then for a single channel,  16 
MB CF card will last approximately 92 days [= 16 MB   /  ( 2 bytes x 24 hours x 60 minutes x 
60 seconds ].   
 
The following formula is to calculate how many days the CF card could do saving before it is 
full. 
  
 The 

day x 3600 seconds ) 
 
To avoid  loosing recorded data while storing on PC, it is necessary to insert CF card back 
again into the recorder soon after loading recorded data onto PC.  
  
 

 
The recorded data is stored in the manufacturer’s special binary format. It is not possible to 
manipulate or modify those recorded data. This feature fully guarantees the security of the 
data. 
 
 

 
The use of Passive Infrared technology on the recorder is an innovative idea to prolong the 
lifetime of the LCD display.  The detector senses the movement of body heat from a distance of 
approximately 2 meters.  This feature works together  with the Screensaver.  For example, if the 
IR Sensor is turned on and Screensaver set to 10 Min, then the display will turn off  10 minutes 
after the user walks away from the recorder. The Passive Infra Red detects when the user 
returns to the recorder and the display turns on straight away, no need to press any key on the 
recorder.  If the user does not prefer using this function, it can be disabled.