HF scientific Micro200BW Turbidimeter - 0-100 NTU - Manual (Page 42)

MICRO 200 BW 0-10 & 0-100 NTU (05/05)
Rev. 3.4
Page 30
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8. Press the . The Frequency at the time of this
selection is saved as the calibration frequency for
the 40 NTU standard. This frequency is displayed
in the right hand column.
9. Insert the Calibration Standard.
10. Rotate the Calibration Standard to its index point.
If the standard has not been indexed, see page 25.
11. Press the F1 key twice to highlight the frequency
for Cal point 1.
12. Press the . The frequency for the 0.02 NTU
standard is saved. This frequency is displayed in
the right hand column.
6.0 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
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 return to the previous
display after pressing . 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 or F4 keys only.
Your personal code may be recorded and used for
general maintenance. This code may be changed at any
time. To record another code, go to the ALARM SETUP
MENU. Press the F4 button to highlight the "F" key you
wish to change. Use the keys to change the
code to fit your requirements.To use the access code
feature, toggle the access code to on. Note that the
security access code must be any combination of four
function buttons, F1 through F4. See page 18. Push the
button to accept this code.