Hach Ultra MET ONE 237AB, User Manual

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Operation
.
To program the MET ONE 237 particle counter for Concentration mode:
1. Press and hold the
MODE
key until CONCEN is lit.
2. Press and hold the
SELECT
key until OPT is displayed.
3. Press the
UP
or
DOWN
arrow until the 3-digit display shows VOL (volume). The 7-digit
display will show either L (liter), 1000 L or CF (cubic foot). L is the default setting from
the factory and the concentration estimates will be expressed as counts per liter.
To change the volume settings:
1. Press and hold the
PROG
key so the light on the
PROG
key turns red and the volume
units in the 7-digit display begins to flash.
2. Press the
UP
or
DOWN
arrow till the required setting is displayed.
3. Press and hold the
PROG
key to save the settings. The light on the
PROG
key will
turn off and the display will not flash now.
5.3.3.1 Set the sample period
To set the sample PERIOD to the desired length:
1. Press and hold the
SELECT
key until the PER light is lit. The 7-digit display shows the
current period setting in HH:MM:SS format, for example: 00:00:06 0.
Figure 9 Calculation using 3-second period
1 3-second period 3 Recalculation and display update
2 Seconds
Figure 10 Calculation using 10-second period
1 10-second period 3 Recalculation and display update
2 Seconds