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STORM

™ 

- SETTLING RATE MONITOR 

INSTALLATION, OPERATION & MAINTENANCE MANUAL 

ESTDS-STORM-IOM - REV K 

 

Page 12 of 31

 

 

6.3

 

Coagulant Control Configuration Screen 

 

The Coagulant control configuration screen is the second configuration screen and is accessed 
from the Floc Control Config Screen. 

 

Control Functions 

The operator can adjust all tuning parameters of the Coagulant Pump control loop. The most 
common parameters that require tuning are highlighted white. Parameters that are normally 

not adjusted are ‘greyed out’.

 

If the 

ACTUAL FINAL TURBIDITY

 (

Turbidity

) is higher than the 

‘F

INAL TURBIDITY 

SP’ 

(

SP

) then 

the Coagulant Pump speed is increased. The increase is clipped to a maximum of 

∆𝑆𝑝

+

𝐶𝑜𝑎𝑔 𝑃𝑢𝑚𝑝 𝑆𝑝𝑒𝑒𝑑 𝐼𝑛𝑐𝑟𝑒𝑎𝑠𝑒 =

(𝑇𝑢𝑟𝑏𝑖𝑑𝑖𝑡𝑦 − 𝑆𝑃). ∆𝑆𝑝

+

∆𝑁

+

 

If the 

‘ACTUAL FINAL TURBIDITY’ (

Turbidity

) is lower than the 

‘FINAL TURBIDITY SP’ 

(

SP

) then 

the Coagulant Pump speed is slowed. The decrease is clipped to a maximum of 

∆𝑆𝑝

𝐶𝑜𝑎𝑔 𝑃𝑢𝑚𝑝 𝑆𝑝𝑒𝑒𝑑 𝐷𝑒𝑐𝑟𝑒𝑎𝑠𝑒 =

(𝑆𝑃 − 𝑇𝑢𝑟𝑏𝑖𝑑𝑖𝑡𝑦). ∆𝑆𝑝

∆𝑁

 

If the 

‘ACTUAL FINAL TURBIDITY’ 

is close to the 

‘FINAL TURBIDITY SP’ 

(within a deadband), then 

the same pump speed will be maintained.  

To improve the response time of the Coagulant Pump control loop (on system start-up), the 
coagulant pump speed will begin from 

INITIAL SPEED 

(%)’

.

 

The Coagulant Pump speed is limited to operate in the band between 

MAX SPEED (%)

 and 

MIN SPEED (%)

.

 

 

Navigation 

There are two (2) navigation buttons at the bottom of the screen, allowing the operator to 
open other screens; 

 

Main (Home) screen 

 

Sequence Configuration 
 

Summary of Contents for Nalco Water STORM

Page 1: ...onitor Installation Operation Maintenance Manual By Nalco Water Engineering Project Development February 2020 Nalco Reference No ESTDS STORM IOM Revision Date Comment Prepared Checked Approved K 20 02...

Page 2: ...Dose Control 8 5 3 Supernatant Turbidity Coagulant Dose Control 8 5 4 Sampling Sequence 8 6 HMI OPERATION 9 6 1 Main Home Screen 9 6 2 Flocculant Control Configuration Screen 11 6 3 Coagulant Control...

Page 3: ...mation Quality Quality build components from major reputable manufacturers Allen Bradley Endress Hauser G F Burkert Festo Schneider Electrical Electrical wiring in accordance with AS NZS 3000 2018 Des...

Page 4: ...ormed Operators and maintenance personnel should be suitably qualified and trained prior to undertaking any work on the equipment for the first time The power and control switchgear and terminations f...

Page 5: ...AC 50 60 Hz or 24VDC to be selected at time of order 6A maximum IP66 control cabinet NEMA 4X Wiring to AS NZS 3000 Water Supply 20 L min 3 bar 0 5 L min consumed Air Supply 10 L min 6 bar Dimensions 9...

Page 6: ...adjacent to the centre well Common installation practice is to use the bridge handrails to mount the unit The STORM cabinet is provided with four 4 mounting brackets located at the rear of each corne...

Page 7: ...bar peak 0 5l min consumed Tube Cleaning potable supply recommended Air 10 l min 6 bar Vacuum generation Cylinder purging 4 4 Electrical Terminations Power The STORM can accept 90 264VAC single phase...

Page 8: ...Designation General Fault Volt Free VFC X3 01 Upper Supply X3 01 Lower Return Analogue Output 1 Flocculant Dosing Pump Speed Ref Section 6 5 1 4 20mA X3 02 Upper 32mA Fused X3 02 Lower Analogue Output...

Page 9: ...linder clear wall and confirm you can see the level probe stainless steel rods Press the Sample Test button A sample will begin to be drawn up into the settling cylinder Continue to hold the Sample Te...

Page 10: ...ed 5 3 Supernatant Turbidity Coagulant Dose Control The final supernatant turbidity can be used to control Coagulant addition When all the particles have settled the supernatant turbidity is measured...

Page 11: ...6 1 Main Home Screen The Main screen is the default screen The HMI will display this screen on power up and will return to this screen after a period of inactivity Control Functions The operator can s...

Page 12: ...tion of the current step and bar graph indication of step time remaining In the event of a fault condition a red banner will appear at the bottom of the screen This will give the operator a descriptio...

Page 13: ...P then the Flocculant Pump speed is increased The increase is clipped to a maximum of If the ACTUAL SETTLING TIME STs is shorter than the target SETTLING TIME SP SP then the Flocculant Pump speed is s...

Page 14: ...RBIDITY SP SP then the Coagulant Pump speed is increased The increase is clipped to a maximum of If the ACTUAL FINAL TURBIDITY Turbidity is lower than the FINAL TURBIDITY SP SP then the Coagulant Pump...

Page 15: ...time is 60 seconds Step 30 MINIMUM SETTLING TIME is used to prevent the sample returning a false early settling time A false reading can occur if the turbidity probe is slow to react to the new sampl...

Page 16: ...TALLATION OPERATION MAINTENANCE MANUAL ESTDS STORM IOM REV K Page 14 of 31 Navigation There are two 2 navigation buttons at the bottom of the screen allowing the operator to open other screens Main Ho...

Page 17: ...ty mg L scaled by the PLC This corresponds to 20mA Using these 4 parameters above the PLC calculates the scaled turbidity value in mg L SETTLED SETPOINT mg L is the turbidity reading at which point th...

Page 18: ...layed Information The turbidity probe raw analogue input is displayed as RAW_ IN The scaled turbidity reading is displayed as SCALED in mg L Navigation There are three 3 navigation buttons at the bott...

Page 19: ...to spray clean water into the settling cylinder and clean the turbidity probe sensor The AIR VENT VALVE allows air to enter the settling cylinder while the sample is being discharged The SAMPLE TEST...

Page 20: ...ulant dosing OFF In AUTO mode the Flocculant Pump is automatically controlled by the STORM to maintain a fixed settling rate In MANUAL mode the operator can select the Flocculant Pump speed set point...

Page 21: ...reading begins to fall When the sample interface passes the turbidity probe make a note of the turbidity value Set this as the Settled Turbidity Setpoint Section 6 2 Settled Turbidity The Flocculant...

Page 22: ...and re install if connection feels loose Check sample line camlock is connected firmly and square Check camlock female connection O ring If O ring is worn or missing replace Listen for air leaks Samp...

Page 23: ...Select the unit into OFF mode 2 Isolate the air supply at the filter regulator 3 Purge air from system by manually operating the purge valve until the pressure gauge reading is 0kPa 4 Isolation feed w...

Page 24: ...ressure gauge reading is 0kPa 4 Isolate feed water 5 Remove the Turbidity Instrument as per Section 8 2 Settling Cylinder Removal Procedure to be read in conjunction with photographs Step 1 Disconnect...

Page 25: ...ighten wing nuts Step 5 Reconnect sample hose camlock ensuring O ring is located inside female connection Step 3 Replace and tighten top PVC union ensure O ring is located in union Step 2 Reconnect le...

Page 26: ...AK LS1 24 Air Solenoid Valve Air Vent Nalco B83093 Air Solenoid Valve Vacuum Control Purge Nalco B20292 Air Solenoid Valve Pilot Nalco B52344 Water Angle Seat Valve Nalco B10644 Vacuum Generator Nalco...

Page 27: ...STORM SETTLING RATE MONITOR INSTALLATION OPERATION MAINTENANCE MANUAL ESTDS STORM IOM REV K Page 25 of 31 9 ELECTRICAL DRAWINGS...

Page 28: ...STORM SETTLING RATE MONITOR INSTALLATION OPERATION MAINTENANCE MANUAL ESTDS STORM IOM REV K Page 26 of 31...

Page 29: ...STORM SETTLING RATE MONITOR INSTALLATION OPERATION MAINTENANCE MANUAL ESTDS STORM IOM REV K Page 27 of 31...

Page 30: ...STORM SETTLING RATE MONITOR INSTALLATION OPERATION MAINTENANCE MANUAL ESTDS STORM IOM REV K Page 28 of 31...

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