YSI 556 MPS - Manual (Page 88)

Section 10 System Setup
YSI 556 MPS YSI Incorporated Page 82
10. Enter the proper number from the keypad for the highlighted
date digit. The cursor moves automatically to the next date
digit. Refer to Section 2.9 Keypad Use for more keypad
information.
11. Repeat Step 10 until all date digits are correct.
12. Press Enter to input the specified date.
13. Use the arrow keys to highlight the Time selection.
14. Press Enter. A cursor appears over the first number in the
time selection.
15. Enter the proper number from the keypad for the highlighted
time digit. The cursor moves automatically to the next time
digit.
NOTE: Use military format when entering time. For
example, 2:00 PM is entered as 14:00.
16. Repeat Step 15 until all time digits are correct.
17. Press Enter to input the correct time.
18. Press the Escape key repeatedly to return to the Main menu
screen.
10.4 Data Filter
The Data Filter is a software filter that eliminates sensor noise and provides
more stable readings.
NOTE: YSI recommends using the default values for the data filter for
most field applications.
However, users who are primarily interested in a fast response from their
dissolved oxygen sensor should consider a change of the default time
constant setting of 8 seconds to one of 2 seconds. This change can be made
according to the instructions in Section 10.3.1 Changing the Data Filter
Settings below. The disadvantage of lowering the time constant is that field
pH readings may appear somewhat noisy if the cable is in motion.