Hach-Lange TSS PORTABLE Handheld Instrument for Turbidity_Suspended Solids Manual - Manual (Page 18)

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.