Smart ESM Turbidity Onboard Calibration Check Procedure
Step-by-step guide for performing onboard turbidity calibration checks
Spare parts required:
Turbidity solutions Kit (Part Numbers 112385)
Protective gloves and safety glasses should be worn when carrying out this procedure.
Procedure:
Step 1: At the filter isolate both valves* so that there is no flow through the filters. Switch the motor
isolation switch off.
*Depending on the version of your system, selected motor and pipework, your layout may
vary – example layouts below with isolation valves circled in RED.
If in doubt, please contact: remotesupport@rivertrace.com.


Step 2: Shake the bottles of fluid for 1 minute to obtain uniformity and then leave to stand for 5 minutes to release any air bubbles.
Step 3: Press and hold the Clean button on the touchscreen and follow the instructions shown on the screen. This will force the ESM into clean water mode and flush the cell with clean water. After 3 minutes press the abort button to stop the clean water flow.
Step 4: Drain the cell by opening the drain valves at the inlet and outlet to the cell, allow to drain then close the valves.

Step 5: At the air regulator decrease the pressure to Zero.
Step 6: Remove the 2 plastic pipes that are connected to the top and bottom of the autoclean ( recording which pipe fits with port on the autoclean cylinder) then remove the autoclean by unscrewing the plastic cap
Step 7: Using the syringe pour 120mL of the following NTU solutions into the autoclean port on the top of the cell.
Draining and flushing the cell each time a new concentration is poured into the cell
Step 8: Observe and record the turbidity reading on the screen.
0 NTU -----> Must display O NTU
50NTU -----> Must display between 49 and 51
350NTU -----> Must display between 349 and 351
Step 9: Drain the solution and refit the autoclean plunger to the cell
Step 10: Refit the 2 plastic pipes to the autoclean.
Step 11: De-isolate the valves on the filter and change the pump isolator switch to on.
Step 12: A calibration check certificate can be created on our RT connected calibration Portal and send to the customer.