Hach TPM870 User Manual page 25

Turbidity measurement methods
You can create and run your own turbidity measurement methods.
Proceed as follows in TitraMaster 85:
1. Create the application that will run turbidity measurements.
2. Click the Add item to sequence button, select a Sample type of
Element. Click the Method button and select the
Direct measurement method (example : "Default Measure").
3. Edit a turbidity measurement method in mV mode using a Redox
combined type of electrode that will measure turbidities.
Since your workstation is configured in "WaterLab" mode (see page 21),
turbidity measurements output in mV at the turbidimeter analogue output
are converted and displayed in NTU.
TPM870 25