Hach Ultra MET ONE 227, User Manual

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Operation
6. Press
2 (INC)
and
3 (DEC)
to select the required period.
7. Press
4 (RET)
to save the settings and return to the main screen.
8. Press
2 (DSP)
and then press
2 (NXT)
four times to display the Volume screen (refer
to Figure 22 ).
9. Press
1 (PROG)
to enter the Program mode.
10. Press
2 (INC)
and
3 (DEC)
to select the unit of volume.
11. Press
4 (RET)
to save the settings and return to the main screen.
12. Press
1 (RUN)
to begin the count cycle. The count status display will display “Wait”
while the pump comes up to speed. The count status display then displays “RUN”
while the counter takes a sample. In the Concentration mode, counting continues
until
1 (STOP)
is pressed.
4.7 Beep mode
In the Beep mode, a single audible sound beeps once, every time a count alarm limit is
reached and then once more for every multiple of the count limit. For example, if the limit
is set at 1,000 particles, the beep will sound at 1,000, 2,000, 3,000 and so on. There are
two size channels displayed at once and the MET ONE 227 particle counter beeps when
either particle size range limit is reached. Set a limit for only one size range of interest
and set the remaining range to zero, which generates no alarm. The Beep mode limits
and count alarm limits are the same.
Figure 21 Period screen
Figure 22 Volume screen