NF FRA5087, Instruction Manual

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3.2 Display at power “ON” and initial settings
FRA5087 3-10
3.2 Display at power “ON” and initial settings
3.2.1 Displays and indications at power “ON”
Take necessary steps before instrument usage/operation according to “2. Preparations before
use” .
Upon your turning power supply switch “on”, the
FRA5087
will conduct its self-diagnosis testing.
During the self-diagnosis, all the front panel lamps will be lit on and the following will be
displayed on the LCD screen:
Testing Memory ·········· ROM
Testing Memory ·········· RAM
The following are the errors that can be displayed through self-diagnosis:
 ROM errors or RAM errors
When the above error information is displayed, the CPU has failures in its ROM or
RAM and the
FRA5087 does not function nor operate.
 Keyboard subsystem error.
This shows that the keyboard subsystem has failures.
 A/D subsystem error.
This shows that you have failures in the A/D subsystem.
Contact and notify the NF representatives when you have one of the three types of errors
mentioned above.
 All setup and data were lost, re-initialized
This error information is displayed either when the battery has been discharged and
hence the data in the memory, etc. Cannot be maintained, or when the backup data have
been destroyed due to some reasons.
In this case all the settings will be initialized and all the data in the permanent data
memory will be cleared; thereafter, however, the instrument will function and operate
normally.
The period of battery backup is no less than three (3) years under normal room
temperature; note, however, that the period depends upon instrument individuality and
usage conditions. Contact the NF representatives when you have a problem of data
backup due to elapse of the battery lifetime, since you need to replace the battery. (You
will
be charged for the replacement.)
For more details on initialization, refer to “3.2.2 Initialization”.
The front panel lamp extinguishes when self-check is complete. The LCD then shows the
opening screen and automatic calibration (Calibration/Systemcheck) is conducted.