HF scientific MicroTOL Online Turbidimeter old series- 0-1000 NTU - Manual (Page 17)

MICRO TOL (12/04)
Rev. 2.7 11
4.2 Security Access Feature
The instrument is equipped with a security access code feature that can be activated in the
configuration mode. If the security feature is enabled, the screen shown in the illustration
below will appear when you press the MODE/EXIT button.
The security code has three numbers that are selectable one at a time. Notice that the first
number in the code is flashing; the flashing indicates that this is the number to be
changed. Use the
t or u arrows to select the value of the first of the three numbers in
the code and then press the
↵ button to accept the first number of the code. Now enter
the second number in the code. Proceed as with the first number followed by
↵. Then
repeat the process for the third number in the access code, remember to finish with the
↵
button.
If you have selected the valid access code, the instrument will be directed to the
calibration mode. If the wrong access code is selected, the instrument will return to the
AUTO mode. Refer to section 7.7 Setting the Security Access for more information.