7
1.4 Storage Media CF Card
The Solid Compact Flash Memory Card (CF card) 128 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 512 MB and 1GB CF Cards are upon request. Alternatively the user may purchase
locally. To ensure compatibility, we recommended only one brand SanDisk. If the recorder is
used with 6-channel inputs, an easy chart to show the maximum days CF can store the data.
CF card
128MB 512MB
1GB
Log speed
1 second
120 days
480 days
960 days
10 seconds
1200 days 4800 days 9600 days
120 seconds
14400 days 57600 days 115200 days
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, 128
MB CF card will last approximately 740 days [= 128 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
?
days = The capacity of CF Card / ( 2 bytes / the Log Speed x the working hours per 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.
1.5 Data Security
The recorded data is stored in the manufacturer’s special binary format. It is not possible to
manipulate or modify the recorded data. This feature fully guarantees the security of the data.
1.6 Infrared Detector ( IR Detector )
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.
Summary of Contents for WH18/06
Page 1: ...User Manual Paperless Recorder WH18 06 15th Edition 03 2008 ...
Page 17: ...17 Figure 2 6 Figure 2 7 Figure 2 8 ...
Page 19: ...19 Figure 2 10 Figure 2 11 ...
Page 25: ...25 Digital input card DI181 Figure 2 21 Analog output card AO183I AO183V Figure 2 22 ...
Page 27: ...27 Figure 2 25 Figure 2 26 ...
Page 70: ...70 Make sure that RS 232 communication setting at the recorder and PC are equal ...
Page 87: ...87 7 Trouble shooting ...
Page 88: ...88 ...
Page 89: ...89 ...
Page 90: ...90 ...
