Hach LXV320.99.00001, User Manual

Page: 18 / 36

18
Start Up
4.5 Setting the display
It is possible to custom-define the first two rows of the display. In the standard setting, the
first line shows the main measured variable and the second line shows the date/time.
1. Select
MENU
, confirm with
ENTER/ON
.
2. Select
DISPLAY
, confirm with
ENTER/ON
.
3. Select
ROW 1
, confirm with
ENTER/ON
.
4. Select option for
ROW 1
, confirm with
ENTER/ON
.
• Measurement value
• Homogeneous
• Battery
• Time
5. Select
ROW 2
, confirm with
ENTER/ON
.
6. Select option for
ROW 2
, confirm with
ENTER/ON
.
7. Press
CLEAR/OFF
to return to the
MENU
.
Note: Press CLEAR/OFF again to return to the main menu.
4.6 Setting the units
The following measurement units are available for turbidity and solids:
Turbidity units (TU): FNU, NTU, EBC
Solids units (DS1 to DS4): ppm, mg/L, g/L, %
1. Select
MENU
, confirm with
ENTER/ON
.
2. Select
UNITS
, confirm with
ENTER/ON
.
3. Select the desired calibration curve (C-TU, C-DS1, C-DS2, C-DS3 or C-DS4) and
confirm with
ENTER/ON
.
4. Select the desired measurement unit and confirm with
ENTER/ON
.
5. Press
CLEAR/OFF
to return to the
MENU
.
Note: Press CLEAR/OFF again to return to the main menu.
4.6.1 Sludge blanket level
To determine the sludge blanket level, set the units to mg/L, g/L or %. Select an integration
time of 0 seconds (refer to
section 4.9, page 21 ) to increase the response time. Calibrate
the measurement system and slowly lower the sensor into the clarifier. Once the sludge
blanket level is reached, the solids concentration will increase significantly. The distance
of the sludge blanket from the surface of the water can then be read off from the meter
markings on the probe cable.