HF scientific Micro200BW Turbidimeter - 0 -1000 NTU - Manual (Page 44)

Page 30
MICRO 200 BW 0 - 1000 NTU (5/05)
Rev. 3.1
VI. SECURITY ACCESS CODE
The security access code for the MICRO 200 BW
provides a degree of protection against an unauthorized
change to the instrument’s settings or parameters. The
security code feature may be turned off if desired.
The first requirement for the security access code after
“power-up” is when you wish to exit the current display
screen (turbidity or backwash). Upon pushing the
MENU button to leave the display screen, a request will
be made for the security access code. If the wrong code
is entered, the screen will indicate this and the screen
will return to the previous display. About ten seconds
are allowed to enter the correct security access code.
After this time the screen will return to the previous
display. Security access codes may be entered using
the F1, F2, F3, F4 or F5 keys, only.
The master security access code of 1435 must be used
for initial use. This master security access code may
always be used. Another code may be recorded and
used for general maintenance. This code may be changed
at any time. To record another code, go to the COMM
PORT MENU. Select F4 button to change the access
code. The MICRO 200 BW will now ask for the security
access code. This may be the master security access code
or the previous code (if any). The next menu will allow
turning the access code off or for entering a new
security access code. To use the access code feature,
toggle the access code to on. Push F3 "Change code"
to enter a new code. Note that the security access code
must be any combination of three function buttons, F1
through F5. See page 20. Push the menu button to
accept this code.