Hach Ultra MET ONE HHPC-6, User Manual, Page: 20 / 51

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Operation
Table 2 provides a description of the various count modes that are available.
3. Press
F4
(Return) to select the displayed mode and return to the Main screen.
4.6.2 Set the sample time or volume
The default Sample Volume setting is 1.0 L.
To set the sample volume:
1. Press
F2
(Setup) on the Main screen. The Setup Page 1 screen is displayed with the
Count Mode field selected.
2. Press the
DOWN
arrow key to move to the Sample Time field (refer to Figure 9 on
page 20 ).
3. Press
F2
(Left arrow) and
F3
(Right arrow) to scroll through all sample volume and
standard sample time selections.
4. Press
F4
(Return) to select the displayed selection and return to the Main screen.
Table 2 Count modes
Mode Description Example
Concentration
The Concentration mode is used to take a quick snapshot of
airborne particulate samples, especially in areas where
particulate levels are unknown and may exceed the
operating levels of the counter. The MET ONE HHPC–6
estimates the count per cubic foot or liter depending on the
volume selected.
The MET ONE HHPC–6 updates the displayed results by
calculating the completed sample counts and volume
compared to the balance of volume.
If the selected volume is 0.1 cubic foot
(1-minute sample) and the sample is
allowed to complete, then the displayed
result is 10 times the actual sampled counts.
If the same sample display was viewed at
the sixth second of sampling, the displayed
result is 100 times the actual
sampled count.
Totalize
In the Totalize mode, the particle counts are displayed and
accumulated as sampled. When the sample is completed,
the record is stored and the value is displayed on the screen
until the next sample is started.
N/A
Audio
In the Audio mode, the MET ONE HHPC–6 beeps each time
the alarm limit exceeds. Refer to
section 4.6.6 on page 25 .
If the limit is set for 10, the counter beeps
when the count first reaches 10 and beeps
again for every multiple of 10.
Figure 8 Setup screen, page 1