Hach PAH500 Manuel De L'utilisateur page 15

4.3 Adjust PAH for turbidity with 4-20 mA output (optional)
If the SC1000 Controller has the optional 4-20 mA output card installed and a turbidimeter is
connected to the SC1000 Controller, the turbidity compensated PAH reading is available as a
4–20 mA output. The turbidimeter must measure the same sample water as the sensor.
Configure one of the 4-20 mA outputs to represent the turbidity compensated PAH reading as
follows:
1. Select SC1000 SETUP > OUTPUT SETUP.
2. Select the output card (e.g., mA OUTPUT INT).
3. Select the 4-20 mA output that will represent the turbidity compensated reading (e.g., OUTPUT
1).
4. Select DATA VIEW > INPUT VALUE.
5. Select SELECT SOURCE > SET FORMULA.
6. Push ADD. Do not push confirm.
7. Select the PAH sensor name, then push confirm.
8. Select PAH. The display shows "A PAH [sensor name]".
9. Push ADD to add another tag. Do not push confirm.
10. Select the turbidimeter name, then push confirm.
11. Select TURBIDITY. The display shows "B TURBIDITY [turbidimeter name]".
12. Enter the formula A*(0.0011*B+1) in Box A. Refer to
Where:
A = PAH value
B = Turbidity value
13. In Box B, enter the formula name (e.g., TBR COMPENS).
14. In Box C, enter a location name (e.g., TANK 1).
15. In Box D, enter ug/L.
16. In Box E, enter PAH.
Figure 8 Formula screen
Figure 8.
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