Setting The Display; Setting The Units; Sludge Blanket Level - Hach LXV321.99.00001 User Manual

Start Up
4.5

Setting the display

4.6

Setting the units

4.6.1

Sludge blanket level

18
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 , confirm with
MENU
2. Select , confirm with
DISPLAY
3. Select , confirm with
ROW 1
4. Select option for
ROW 1
• Measurement value
• Homogeneous
• Battery
• Time
5. Select , confirm with
ROW 2
6. Select option for
ROW 2
7. Press to return to the
CLEAR/OFF
Note: Press CLEAR/OFF again to return to the main menu.
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 , confirm with
MENU
2. Select , confirm with
UNITS
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
5. Press to return to the
CLEAR/OFF
Note: Press CLEAR/OFF again to return to the main menu.
To determine the sludge blanket level, set the units to mg/L, g/L or %. Select an integration
time of 0 seconds (refer to
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.
.
ENTER/ON
.
ENTER/ON
.
ENTER/ON
, confirm with
ENTER/ON
.
ENTER/ON
, confirm with
ENTER/ON
.
MENU
.
ENTER/ON
.
ENTER/ON
.
.
MENU
section 4.9, page 21) to increase the response time. Calibrate
.
.
.
ENTER/ON