Extech Instruments CO80, Руководство пользователя

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CO80 V3.1 04/06 32
By pressing the “
Pressure
” and “
Clock
” button, the character will
increment up or down respectively through the character set, as laid out in
Appendix B.
To fix the new header, press the “
Scroll
” button, and the screen will return
to the Display 1 as shown in section 2.6.
Assigning characters is achieved in a way similar to amending the time
and date (
see 5.3 - Clock
).
5.4.2. Setting your Security Code
There is an optional security code for the first line of your header. If you do
not enable the security code, the header can be changed as detailed in
5.4.
To enable the security code, a four-digit code must first be chosen. Press
and hold the “
Clock
” button until a “beep” is heard – the first of the time
digits will now flash. Move down until the first digit of the year flashes, and
enter the code ‘7777’ in the year field.
This notifies the CO80 that the security code is about to be entered. The
first ‘time’ digit will now flash.
WARNING
Once a security code has been entered it cannot be changed. You will
need to keep this code safe, as the top line of the header cannot be
changed without it. If you forget or lose your security code and need to
change the top line of header, the unit will have to be returned to Extech
and a charge will be incurred for clearing the memory.
Enter the four-digit code you have chosen in the time field, and confirm
this by entering the same code in the date field. This code will be saved to
memory. The code will not be accepted unless the time and date fields are
the same.
A two-tone beep will sound once a valid code has been accepted and the
top line of the header will be protected next time the unit is switched on.