ECT 9800 OPERATIONS MANUAL - The Automation Group, Inc
Contents
1. V8 Betis v9 miim 2 Closed Drain Valve 1 opens forcing air through the filter After Valve 1 closes a short delay occurs before Valve 3 opens which allows filtrate to drain into the Sample Reservoir This is repeated until the Level Detector is activated which is indicated by the reservoir graphic turning blue Notice that the Fill Attempt text box next to the reservoir keeps track of how many times Valve 3 has to open to collect a sample ECT Operation Maintenance and Service Manual PAGE 42 Sample Line 1 Sample Line 3 S Sample Line Z Filling Aliquot E A START STOP l tj Closed Water Running V11 le v7 L 1 Ew Open Closed SCV V10 v12 Z 564 Water Me tis Closed Air j Closed ic ide V6 amp v3 lehrt Drain S Air e va J Titrant Status 4 Normal v9 o Closed T Drain Valve 4 opens pressurizing the Sample Reservoir Valve 8 opens allowing the filtrate in the Sample Reservoir to fill pH conductivity chamber and the Aliquot The excess goes to drain ECT Operation Maintenance and Service Manual PAGE 43 Sample Line 1 Sample Line 3 Za Sample Line Filling Sensor Essa g START STOP I A IET 8I 1 Water v EET gt Running _ E Open Closed SCV V10 12 S 562 Water Nen eto Air Closed V3 Bets Air Comets a Drain I Pump Stroke L L lt 11 Titrant Status Normal V8 Neri vg E s Open Dr2. Remember my password cma Once the correct username and password have been entered the Status screen and the main left menu bar will appear ECT Operation Maintenance and Service Manual PAGE 26 FIGURE 16 E Untitled Document Microsoft Internet Explorer File Edit view Favorites Tools Help Oa O x B JD Search N Favorites A Media O2 TIENI Address http Ject9800 stations ECT Index htm ECT 9800 Sample Line 1 Sample Line 3 P Sample Line 2 SL 1 2 3 System Stop d f z START STOP j i j aS Water 111 Bs Stopped Closed Closed v10 v12 Water Lem Closed BE Air v2 V1 V3 Bets Fill Attempt Air Coen 3 V8 Nen v9 UR A Closed Drain SYSTEMS INC E gt SQ Local intranet On the left menu bar links to pages such as the Monitor page and the Pump Setup pages appear Simply hold the mouse over any of these links and left click to see that page ECT Operation Maintenance and Service Manual PAGE 27 The Setup Screens are used to configure the ECT9800 The Time Screen allows the user to fine tune the ECT s operation and improve the speed at which it collects a sample performs a titration and updates the readings In figure 17 you will see there are several parameters on the Time setup screen Each parameter controls some function of the 14 different operating modes FIGURE 17 Mode Setup Drain Sample Time Filter Wash Time Ri
3. Laptop Desk top Ethernet RJ 45 Connection ECT Operation Maintenance and Service Manual PAGE 23 3 4 2 CONNECTION TO STAND ALONE OR MULTIPLE COMPUTERS USING ETHERNET HUB A network Hub can be used to connect multiple computers and the Access Point using Straight Thru Cat 5 cable FIGURE 13 00000000000300 T TTT Straight Thru Cables Laptop OD O 1 T The WAC is shipped with factory network settings The network settings information is labeled on the enclosure Configure your computer network settings as instructed bellow to enable communications with the WAC Computer Network Settings 1 To configure the laptop or desktop computer network settings the following network setup must be performed For Windows 95 Windows 98 Windows 2000 and Windows NT Goto START SETTINGS CONTROL PANEL NETWORK Under the Configuration tab check TCP IP as the Network protocol and click on network properties Select Specify an IP address type in the IP address the IP address should be in the range specified in the static address pool entered for the W A C The WAC IP address is indicated on its enclosure You will also need to set the Subnet Mask to match the WAC settings Here is an example of the WAC settings ECT Ope
4. 1 Water V11 Ben v Open Closed V10 V12 Water Bier Closed E Air Open v2 v1 V6 v3 lens Drain Fill Attempt Air Comets j 6 va J Titrant Status V8 Batis n v9 DER Open Drain Valve 7 opens flushing the Sensor Reservoir and Level Detector with water Valve 5 opens allowing the Aliquot Dispenser to be back flushed Valve 6 opens allowing flush water from the Sensor to drain Valve 13 PH Conductivity option opens allowing the pH conductivity chamber to drain ECT Operation Maintenance and Service Manual PAGE 35 Sample Line 1 Sample Line 3 S1 Sample Lime 2 Draining System prem START STOP I INIT M Water vit EET Running _ Ew Open Closed SCV 10 12 513 Water Ee 11375 Closed B Air Open E V6 gt v3 ST Air LN Titrant Status Normal V9 Betis Drain Open Valve 4 opens pressurizing the Sample Reservoir Valve 9 normally open closes Valves 5 6 8 and 13 open draining the Aliquot Dispenser Sensor Sample Reservoir and pH conductivity chamber ECT Operation Maintenance and Service Manual PAGE 36 Sample Line 1 Sample Line 3 SL 1 Sample Line 2 Collecting Sample mm ES START STOP l f eS TTT Water V11 Nen Open Closed SCV V10 Vv12 546 Water Miei TT Air Closed mm ve ids V6 V3 Hens Air LETS j 1 va J Titrant Status l Pump Stroke l F Fill Attempt 0 V8
5. Sample Line 3 DEMAND ueq NOTE The PH and Conductivity outputs are only active if those optional analyzers are installed on the unit 33 ELECTRICAL CONNECTIONS POWER amp 4 20mA Outputs For safety and proper operation a grounded stable AC power source must be provided If the line voltage is not stable the ECT s output will be erratic Follow the provisions in the National Electric Code NEC and local electrical safety codes when providing power to this Or 7 other electrical device A standard receptacle power cord is installed on the unit Terminals for power connections are located in the upper enclosure and are labeled L1 N and F Fuse for AC power is a GMA 250 VAC 5 amp Ensure the input power L1 is connected to the Fused Terminal as shown in figure 9 All internal electrical connections are established during the manufacturing of the ECT Therefore the operator does not need to make any adjustments However if 4 20mA outputs are desired the terminals are labeled in FIGURE 10 for sample lines 1 2 and 3 There are two outputs for each sample line representing the stabilized STREAMING CURRENT VALUE Charge and CHARGE DEMAND There is an additional output per sample line for each analyzer that is added If both PH and Conductivity are installed on the ECT there will be a total of twelve 4 20 mA outputs 1 e Charge Charge Demand PH amp Conductivity outputs for each of the three sample lines Current outputs are i
6. from valve 6 should have at least 10 seconds of air blowing out after the bulk volume of liquid is expelled Filter Wash Time should be set for 5 to 15 seconds Longer filter wash times may be required for furnishes that have more fillers and or recycled material Chem Injection Time should be set for 10 to 15 seconds Chem Wash Time should be set for 45 to 90 seconds Rinse Sensor Time should be set for 90 to 180 seconds Longer Rinse times will help reduce required sensor maintenance Air Flush Time should be set for 2 to 5 seconds Collect Sample Time should be set for 5 to 15 seconds There are three settings each is for a separate line The first setting is for line 1 the second for line 2 and the third for line 3 Adjust the Collect Sample times to optimize sample collection speed on each individual line Fill Aliquot and Fill Sensor Time should be set for 15 to 30 seconds Ensure the time is long enough to allow all the sample to be transferred from the reservoir to the aliquots and then to the sensor Sensor Condition Time and Stabilizing Time These should be set for 30 to 60 seconds Ensure the reading is not still changing rapidly prior to the start of the Titrating mode Sample Setup Sample Line Select should be set for whichever lines that are being used at that time Sample Line Skip and Sample Line Skip Cycles allow the user to setup the ECT so that it runs more samples on one line than another Select which lines that
7. 3 SL 1 Sample Line 2 System Stop G START STOP j I GORTE Water V11 MS V7 Stopped Closed Closed o SCY v10 v12 Z 0 Water eth CS E Air Closed mem va M v6 v3 Meter Pump Stroke Titrant Status Normal 5 3 Closed Drain SYSTEMS INC ECT Operation Maintenance and Service Manual PAGE 17 2 6 WEB ACCESS CONTROLLER The Web Access Controller controls all of the ECT valves and pumps It also obtains the STREAMING CURRENT VALUE from the streaming current from the IO node generates 4 20mA outputs produces web page displays readouts and provides an 10 Base T CAT 5 Ethernet connection Operation of the controller is detailed in Section 4 1 2 7 pH AND CONDUCTIVITY ANALYZERS The pH and Conductivity analyzers are an available option on the ECT9800 The analyzers are calibrated by Chemtrac Systems and are ready to be used Consult the manufacturer s manual for instructions on operation calibration and maintenance instructions ECT Operation Maintenance and Service Manual PAGE 18 3 0 INSTALLATION 3 1 SAMPLE CONNECTIONS Three furnish samples with a consistency of 4 or less can be delivered to the ECT e g Blend Chest Machine Chest Headbox etc The ECT is equipped with three sample lines with 2 MNPT fittings on the inlet and outlet of the ECT sample line Manual service valves 2 ball valves must be installed on both the inlet and outlet of
8. 5 mL or if you feel the Pumps dispensing volume needs to be adjusted follow the procedure on the following page 12 Repeat steps 5 through 11 for Pump 2 ECT Operation Maintenance and Service Manual PAGE 61 ADJUSTING THE TITRANT PUMPS If the Pump requires adjustment a 4 and a 1 2 open ended wrench will be required a 1 4 open ended wrench should have been supplied with the unit 1 First unloosen the Lock Nut using the 1 2 wrench Outlet A Lock Nut A Adjustment Screw Inlet 2 Placing the 1 4 wrench on the flat surfaces of the adjustment screw make small 1 8 to 1 4 adjustments to adjust for the dispensing volume desired Turn the adjustment Clockwise to decrease dispensed volume and Counter Clockwise to increase volume Note You should not have to turn the adjustment more than one full turn from its original position If the pump s dispensing volume does not change with a 1 2 turn contact the factory for instructions 3 After the desired output is reached tighten the Lock Nut using the 1 2 wrench and recalibrate the pump using the steps outlined in ECT9800 Titrant Pump Calibration Procedure The graph on the following page shows the approximate dispensing output versus the number turns of the adjustment screw The pumps are normally adjusted for the 3 5 to 4 turn from fully CCW range This should produce a dispensing volume of around 3 to 3 5 mL for 50 strokes This output
9. CHEMTRAC The Process Optimization Company CSI Systems Inc ECT 9800 OPERATIONS MANUAL ON LINE ELECTROKINETIC CHARGE TITRATOR Optional pH and conductivity Revised 05 07 Chemtrac Systems Inc 699 Peachtree Industrial Blvd Building 600 Norcross GA 30092 800 442 8722 PH 770 449 6233 FX 770 447 0889 www chemtrac com TABLE OF CONTENTS SYMBOE KEY 15 esc eoe eto neca Ok ocala ol sS 5 SAFETY PRECAUTIONS mennina epo p ite bec d ont o ne dote tad ca ater 5 WARRANTY INFORMATION 2122802266 252 xenetdciveeee e Dems bi unie besteht taped aieo eh Rape 6 LO GENERAL INFORMATION 2223521 J dasa cult clave thse T See G deh uate cit deus state 7 1 1 STREAMING CURRENT AND CHARGE DEMAND eene 7 1 2 STREAMING CURRENT AND THE DOUBLE LAYER eene 8 2 0 SPECIFICATIONS AND COMPONENTS itd ded caet agnita vend 10 2 V SBECIFICATIONS 25225528 020004 1041522 0090500 aen ace e cS D eiie SAO T 10 22 HARDWARE tet oeste quii atm e EM MN c 11 20 5 SENSOR AND PROBE 555 nete debent teer tete eda Qe eic r ker dite 15 ZA SIGNAL PROCESSING 2104094 e egisti ua etie ai quas ee edat E 16 233 ECT9800 USER INTERFACE iicet teorie detiene dese t 17 2 6 WEB ACCESS CONTROBLEBER edere sr eet en eer vea a oes th quain euren ded 18 2 7 pH AND CONDUCTIVITY ANALYZERS ii rinde ite vat drei vant addas 18 SU INSTALLATION 22244474 teats sacs vespa t tet teret edet Aaa gei ede to ee ee ra c
10. Digital Outputs 24 VDC Input Signals Ten 10 Analog Inputs Isolated Fourteen 10 Digital Inputs Isolated Maintenance Once every 2 to 4 weeks clean sensor and refill titrant refill chemical carboy Chem Wash Option Once every 3 to 6 months clean valves and filters Titrants Polyelectrolytes PolyDadmac cationic and PVSK anionic Chemical Wash Diluted household bleach 10 1 Consumption lt 50mL hour 10 2 2 HARDWARE ECT Operation Maintenance and Service Manual PAGE 11 FIGURE 2 ECT Front View POWER SUPPLY PH amp CONDUCTIVITY WEB ACCESS ANALYZER CONTROLLER ANALOG DIGITAL IO 4 20 mA OUTPUTS Power Switch WIRING TERMINALS ALIQUOT DISPENSER OPTO SWITCH VALVE 9 VALVE 5 PH SENSOR TITRANT TITRANT PUMP1 PUMP 2 ECT Operation Maintenance and Service Manual PAGE 12 FIGURE 3 ECT Back View SAMPLE LINE 1 SAMPLE LINE 2 SAMPLE LINE 3 VALVE 10 LINE 1 VALVE 11 LINE 2 VALVE 12 LINE 3 wie PILOT VALVE MANIFOLD VALVE 2 WATER EM UM E E VALVE 1 AIR R PRESSURE WATER PRESSURE EGULATOR REGULATOR LEVEL DETECTOR RESERVOIR VALVE 8 ECT Operation Maintenance and Service Manual PAGE 13 Figure 4 represents the ECT s hardware in schematic form allowing the operator to view the movement of the sample air and water through the system This schematic is shown again in Section 4 2 as each operation mode of the ECT is explained FIGURE 4 System
11. Drainage from Filter Filtrate Aliquot over flow V4P Pressurize Sample Reservoir Selects Sample Line 1 V4D Vent Sample Reservoir Selects Sample Line 2 V5 Fill Sensor Selects Sample Line 3 V6 Drain Sensor Vent Sensor ECT Operation Maintenance and Service Manual PAGE 32 Sample Line 1 Sample Line 3 S1 Sample Lime 2 Draining System prem START STOP I f efits at Water vit EET Running _ Ew Open Closed SCV 10 12 513 Water Ee 11375 Closed B Air Open S Ms V6 gt v3 lenti 1 Air LN Titrant Status Normal V9 Betis Drain Open During this mode Valve 4 opens pressurizing the Sample Reservoir Valve 9 normally open closes Valves 5 6 8 and 13 PH Conductivity option open draining the Aliquot Dispenser Sensor Sample Reservoir and pH conductivity chamber ECT Operation Maintenance and Service Manual PAGE 33 Sample Line 1 Sample Line 3 SL 1 Sample Line 2 Washing Filter START STOP I P Closed Water V11 Ber v Open Closed V10 12 Water Gers usm Air Closed v2 v1 v3 enti 1 Fill Attempt Air Coens NL 6 V4 J Titrant Status Normal s V8 Ner v9 mem 2 Closed Drain During this mode Valves 1 and 2 open to flush the active sample line filter with air and water ECT Operation Maintenance and Service Manual PAGE 34 Sample Line 1 Sample Line 3 SL 1 START STOP I 61 188
12. according to this protocol Pump 1 Cationic Pump 2 Anionic 4 3 2 Dual Cationic Mode Setup PUMP MODE The Dual Cationic mode is desired when the incoming samples will always be of the same charge anionic and also have significant differences in demand i e headbox vs blend chest Thus titrants of the same charge with different normalities can be used to titrate the samples Using different normality titrants on samples with different demand characteristics can greatly improve the titration results Note The titrant with a higher normality must be fed through PUMP 1 The ECT will begin with this titrant and subsequently determine which titrant normality to use The ECT will automatically switch between titrant strengths depending on the previous charge demand for each sample line The operator enters the critical value see Section 4 4 and the deadband that the ECT uses to decide which pump or in ECT Operation Maintenance and Service Manual PAGE 47 other words which normality titrant to use Thus when the CHARGE DEMAND exceeds the critical value the deadband value the stronger titrant will be used from PUMP 1 and the volume of titrant added will be optimized When the CHARGE DEMAND from the previous titration is below the critical value the weaker titrant will be used from PUMP 2 The purpose of this mode is to analyze samples with a large variation in CHARGE DEMAND NOTE In PUMP MODE all outputs can
13. do require as much data collection and then enter the number of times the line should be skipped before a sample is measured Max Reservoir Sample Attempts should be set for 25 to 100 During Sample Collection mode if Valve 3 opens more times than the Max Rsvr Smp Attempts is set for an alarm will be activated showing that the Filter is clogged End Start Delay is used to put a delay between the ECT moving from one sample line to the next after a titration is complete ECT Operation Maintenance and Service Manual PAGE 50 4 4 2 Pump Setup Titrant Pump Setup Pump Mode Sample Volume Pump 1 Normality 0 001000 Pump 2 Normality 0 000500 Pump 1 Cal Value 0 060 ml Pump 2 Cal Value 0 060 ml e SL 1 SE2 SL 3 Critical Value Deadband Pump 2 mL Readout Normalized Value Titrant Pump Cal Prime Select Pump 1 Calibrate Prime Max Pump Strokes Pump Strokes Titrant Pump Stroke Freq vs Charge Value Pump Mode selects either Anionic Cationic titrant mode Dual Cationic Mode with two different strength titrants or Mode 3 Mode 3 is used when there is only a need to use one strength cationic titrant In this instance both titrant jugs can be plumbed up together to both pumps When using Mode 3 in the event that Pump 1 should fail then Pump 2 will automatically be used Sample Volume is the amount of sample collected in the aliquot and transferred to the sensor for titration This is normally set at factory Pu
14. particles Because of their small size surface area plays a major role in their behavior along with the charge density associated with each particle Most materials involved in papermaking have a net charge on the surface For example fibers fines and fillers carry a net negative charge as well as other papermaking additives Additives that are cationic in nature are attracted to the anionic components The cationic particles are tightly bound to the surface of the anionic colloid thus forming the Stern layer These cationic particles are also known as counter ions The electrostatic forces at this layer are strong enough to prevent displacement of the counter ions by shear forces Outside of the Stern layer is a grouping of counter ions known as the Diffuse layer hence the term double layer This is depicted in FIGURE 1 The ions in the Diffuse layer are further apart and can be displaced when a shear force is present The ECA effects the shearing of counter ions and then measures the current generated by the movement of these cationic particles This is how the streaming current value is measured by the ECA The shearing of the counter ions occurs between the Stern layer and Diffuse layer known as the slip plane As previously mentioned the measurement of zeta potential is also based upon the double layer theory The zeta potential is valid at the slip plane Essentially the zeta potential is measured between the slip plane a
15. provided for the drain The flow rate is less than 10 Gal hr ECT Operation Maintenance and Service Manual PAGE 20 FIGURE 9 FUSED TERMINAT LII N b 78 909 13 14115116 L1 H1 z FIGURE 10 Figure 10 shows the 4 20mA Output Isolators which are located in the upper enclosure bottom right hand corner The table on the following page list the outputs and corresponding terminal numbers The odd terminals are the 4 to 20 mA signal and the even terminals are the 4 to 20 mA signal ECT Operation Maintenance and Service Manual PAGE 21 33 34 Sample Line 1 PH 35 36 Sample Line 1 CONDUCTIVITY uS 37 38 Sample Line 2 PH 39 40 Sample Line 2 CONDUCTIVITY uS 41 42 Sample Line 3 PH 43 44 Sample Line 3 CONDUCTIVITY uS 45 46 Sample Line 1 CHARGE SCV 47 48 Sample Line 1 DEMAND ueq 49 50 Sample Line 2 CHARGE SCV 51 52 Sample Line 2 DEMAND ueq 53 54 Sample Line 3 CHARGE SCV 55 56
16. recommends that the user purchase the 005 N and dilute this titrant to the proper strength This will save on cost and on the total volume of titrant that will need to be kept on hand It is ideal to select a titrant strength which results in titration volumes between 1 5 to 4 mL If the titration is using more or less than 1 5 to 4 mL on average than it is recommended to change titrant strength Using the Dual Cationic Pump strategy a stronger cationic titrant can be used on Pump 1 and a weaker titrant on Pump 2 For example Pump 1 may have a titrant strength of 001 N while Pump 2 has a strength of 0005 This would allow the ECT to cover a broader range of charge demand while producing accurate results The following table will help you choose the titrant strength best suited for your average Charge Demand and instruct you on solution mixtures Titrant Selection and Makedown Chart Titrant Low End High End 1000 mL Solution Mixture 1000 mL Solution Mixture Normality N Demand peq Demand peq 005N Titrant Distilled H2O 001N Titrant Distilled H2O 0 005 150 750 1000 mL 005 0 mL H20 N A 0 0045 135 675 900 mL 005 100 mL H20 N A 0 004 120 600 800 mL 005 200 mL H20 N A 0 0035 105 525 700 mL 005 300 mL H20 N A 0 003 90 450 600 mL 005 400 mL H20 N A 0 0025 75 375 500 mL 005 500 mL H20 N A 0 002 60 300 400 mL 005 60
17. 0 mL H20 N A 0 0015 45 225 300 mL 005 700 mL H20 N A 0 001 30 150 200 mL 005 800 mL H20 1000 mL 001 0 mL H20 0 0009 27 135 180 mL 005 820 mL H20 900 mL 001 100 mL H20 0 0008 24 120 160 mL 005 840 mL H20 800 mL 001 200 mL H20 0 0007 21 105 140 mL 005 860 mL H20 700 mL 001 300 mL H20 0 0006 18 90 120 mL 005 880 mL H20 600 mL 001 400 mL H20 0 0005 15 75 100 mL 005 900 mL H20 500 mL 001 500 mL H20 0 0004 12 60 80 mL 005 920 mL H20 400 mL 001 600 mL H20 0 0003 9 45 60 mL 005 940 mL H20 300 mL 001 700 mL H20 0 0002 6 30 40 mL 005 960 mL H20 200 mL 001 800 mL H20 0 0001 3 15 20 mL 005 980 mL H20 100 mL 001 900 mL H20 0 00005 1 5 7 5 10 mL 005 990 mL H20 50 mL 001 950 mL H20 Once a titrant strength has been selected be sure to enter the current normality being used on the Pump Setup screen ECT Operation Maintenance and Service Manual PAGE 55 The titrants which are available in 1 Liter 4 Liter and 20 Liter containers can be ordered directly from NALCO You can contact customer service in the United States at 708 496 7000 or toll free at 800 879 8708 Alternatively the operator may choose to use a process additive In doing so a specific application may be analyzed or optimized The limitation is that the data will not be universally applicable
18. 5 Replace clamp and hand tighten Boum It should not be necessary to remove the float switch from the reservoir base However if it becomes necessary secure the float to the body of the switch to prevent movement This will prevent the float from bending against the water nozzle located inside the reservoir ECT Operation Maintenance and Service Manual PAGE 59 5 7 TITRANT PUMP CALIBRATION Calibration of the pump determines the precise volume of titrant delivered by each pump stroke This is necessary when the unit is initially set up when the pump rate is manually changed using the adjustment screw or if the titrant normality is changed There are two 2 titrant pumps on the ECT9800 It is recommended to calibrate these pumps on a monthly basis approximately every other time the titrant jugs are refilled This procedure will cover how to calibrate the pumps The only tools required should be located in the lower enclosure of your ECT9800 The tools needed are 10 mL graduated cylinder 7 To calibrate the pump 1 You will first need to stop the ECT using the Touchscreen Display and Locate the Pumps the pumps are located in the bottom enclosure to the right of the sensor assembly see figure 2 on page 10 2 Remove the tubing from the check valve barb fitting located on the sensor housing and connect this tubing to the calibration check valve Place the calibration check valve into the 10 mL graduated cylinder to collect the disp
19. 5 2 FILTER REMOVAL AND CLEANING Only remove filters on sample lines that have been properly flushed DO NOT ALLOW STOCK TO GET BEHIND THE FILTER Before the filter can be removed the system must be shut down and the lines flushed Stop the ECT and flush the sample line using the manifold valve overrides First override the sample line valve 10 11 or 12 and then override valve 1 and 2 After 30 seconds shut off valve 2 After another 30 seconds shut off valve 1 and the sample line valve 1 Remove clamp on filter housing 2 Pull back on housing and remove filter With the filter removed use a mild cleaning agent and gently clean the filter Brushing may be necessary to remove deposits Remove all material build up and then thoroughly rinse Replace with a new filter if deposits cannot be removed 3 Replace filter and ENSURE THAT THE SMOOTH SIDE FACES UP Also ensure that the o rings on the upper and lower housing are in place 4 Tighten clamp around housing hand tight is usually sufficient FIGURE 12 Filter Housing FILTER l ORINOS with smoth side up FILTER HOUSING CLAMP us ECT Operation Maintenance and Service Manual PAGE 56 5 3 Probe and Piston Removal and Cleaning Before removing the probe STOP the operation of the ECT9800 1 Unscrew bottom slip nut on the sensor 2 Pull down on thumb tab to remove probe cartridge Then disconnect the probe s QH cable from the ECT by unscrewing the
20. AMING CURRENT CARD ECT Operation Maintenance and Service Manual PAGE 15 The piston moves up and down inside the probe that is closed at the bottom The space between this piston and the probe is called the annulus which is critical to the streaming current device The annulus has the shape of a thin cylindrical shell which contains sample fluid and particles The clearance between the piston and probe wall is several thousandths of an inch As the piston reciprocates it acts as a pump when moving downward it forces sample out of the cylinder upward through the annulus Note that the annular clearance is large enough to allow most particles in a typical sample to pass in or out but small enough to cause significant fluid velocity within this space When the piston reverses direction it pulls fluid downward into the increasing volume below The constantly reciprocating piston creates turbulence that ensures adequate mixing and continuous renewal of sample such that changes in particle characteristics can be monitored It may then be assumed that the surfaces of both the piston and cylinder become adsorbed with particles from the sample These particles adhere to the piston and cylinder walls by Van der Waal s forces As the reciprocating piston induces fluid motion the counter ions of the double layer are sheared away from the colloidal particle Figure 5 shows where the electrodes are positioned These are two metal rings insert
21. Betis v9 miim 2 Closed Drain Valve 1 opens forcing air through the filter After Valve 1 closes a short delay occurs before Valve 3 opens which allows filtrate to drain into the Sample Reservoir This is repeated until the Level Detector is activated which is indicated by the reservoir graphic turning blue Notice that the Fill Attempt text box next to the reservoir keeps track of how many times Valve 3 has to open to collect a sample ECT Operation Maintenance and Service Manual PAGE 37 Sample Line 1 Sample Line 3 S Sample Line Z Filling Aliquot m START STOP l tj Closed Water Running V11 le v7 L 1 Ew Open Closed SCV V10 v12 Z 564 Water Me tis Closed Air j Closed ic ide V6 amp v3 lehrt Drain S Air e va J Titrant Status 4 Normal v9 o Closed T Drain Valve 4 opens pressurizing the Sample Reservoir Valve 8 opens allowing the filtrate in the Sample Reservoir to fill pH conductivity chamber and the Aliquot The excess goes to drain ECT Operation Maintenance and Service Manual PAGE 38 Sample Line 1 Sample Line 3 Za Sample Line Filling Sensor Essa g START STOP I A IET 8I 1 Water v EET gt Running _ E Open Closed SCV V10 12 S 562 Water Nen eto Air Closed V3 enr Air Comets a Drain I Pump Stroke L L lt 11 Titrant Status Normal V8 Neri vg E 2 Open Drain
22. Schematic SAMPLE LINE 1 FILTER SAMPLE LINE 2 FILTER SAMPLE LINE 3 FILTER SAMPLE RESERVOIR PH and CONDUCTMTY CHAMBER ALIQUOT V13 V5 SENSOR V6 STREAMING CURRENT DRAIN CARD System Valves Vl Air V2 Water V3 Drainage from Filter Reservoir Inlet V4 Vent Sample Reservoir 4D Pressurize Sample Reservoir 4P V5 Fill Sensor V6 Drain Sensor Vent Sensor V7 Rinse Sensor and Level Detector V8 Fill Aliquot Dispenser Reservoir Outlet V9 Aliquot over flow V10 Selects Sample Line 1 V11 Selects Sample Line 2 V12 Selects Sample Line 3 V13 Drain pH conductivity chamber Optional ECT Operation Maintenance and Service Manual PAGE 14 2 3 SENSOR AND PROBE The sample to be analyzed flows into the sensor which is the housing for the probe The probe contains the electrodes measure the STREAMING CURRENT A simplified picture of this assembly is presented in Figure 5 Inside the probe is a small piston that reciprocates vertically Above the piston the piston rod is attached to an eccentric point on a crank driven by a motor outside the sensor The piston s velocity is thus sinusoidal in nature FIGURE 5 Streaming Current Sensor and Probe ECCENTRIC MOTOR CRANK ALIQUOT TITRANT INLET INLET PISTON SENSOR HOUSING ANNULUS ELECTRODES PROBE CONTAINS ELECTRODES PLUG AND CONNECTION CONNECTION FROM ELECTRODES TO THE STRE
23. Valve 5 opens emptying the contents of the Aliquot into the Sensor ECT Operation Maintenance and Service Manual PAGE 39 Sample Line 1 Sample Line 3 SL 1 Sample Line 2 Conditioning P efits at Water V11 enr Open Closed V10 12 Water Coie ts Closed Air v2 V1 v3 MIC OST Fill Attempt Air ole tis J 6 va Titrant Status Normal X V8 Nen v9 RR Closed Drain The first sample taken is used to condition the Sensor While the sensor is being conditioned Valves 1 and 3 are operating to collect more sample into the reservoir ECT Operation Maintenance and Service Manual PAGE 40 Sample Line 1 Sample Line 3 S1 Sample Lime 2 Draining System prem START STOP I 7 INIT M Water vit EET Running _ Ew Open Closed SCV 10 12 513 Water Ee 11375 Closed B Air Open E V6 gt v3 ST Titrant Status Normal v9 eR 3 Open Drain Valve 4 opens pressurizing the Sample Reservoir Valves 5 6 and 8 open draining the Sample Reservoir Aliquot Dispenser and Sensor ECT Operation Maintenance and Service Manual PAGE 41 Sample Line 1 Sample Line 3 SL 1 Sample Line 2 Collecting Sample mm ES START STOP l f eS TTT Water V11 Nen Open Closed SCV V10 Vv12 546 Water Miei TT Air Closed amm Ne id V6 v3 er Air CESR j 1 va J Titrant Status l Pump Stroke l F Fill Attempt 0
24. ain Valve 5 opens emptying the Aliquot Dispenser into the Sensor ECT Operation Maintenance and Service Manual PAGE 44 Sample Line 1 Sample Line 3 SL 1 Sample Line 2 Stabilizing _ Sus WR i START STOP I S TT Water Ew Open Closed SCV 10 12 342 Water eis CS Air Closed V3 eh Air Comets a 6 va Titrant Status Normal l Pump Stroke l V8 Closed v9 miim 2 Closed Drain Once the Sensor has been filled the Streaming Current reading is allowed to stabilize ECT Operation Maintenance and Service Manual PAGE 45 Sample Line 1 Sample Line 3 SL 1 Sample Line 2 Titratin g l f BST a Water V11 Betis v Ew Open Closed w SCV V10 Vv12 347 Water Mei aS B Air 4 Closed v2 v1 V v3 Ie f Air Cu E Titrant Status Normal Drain Pump Stroke 47 gt Fill Attempt 7 V8 Betis v9 Tem Closed Drain Pump 1 or Pump 2 begins adding titrant the active pump is indicated by a green flashing light As the Streaming Current Value approaches zero the addition rate slows Once the value reaches zero the outputs are updated and the sample is drained The number of Pump strokes is displayed in the text box located between the pump graphics Once the titration is complete the amount of titrant used is subtracted off from the volume readout on the titrant jug graphics The Reset button is used to reset the titrant volume to 8000
25. an oppositely charged material which is critical to additive performance and optimization CHARGE DEMAND is measured to detect changes in charge before the furnish goes to the wire allowing operators to determine Interfering substances in the furnish deleterious matter or anionic trash Furnish charge compatibility with a given additive Additive type and addition rates for optimum retention drainage Charge demand of incoming filler stream Charge demand of incoming broke deinked recycled pulp or virgin pulp to determine their effect on total system charge ECT Operation Maintenance and Service Manual 7 e Variations in headbox furnish charge and charge demand to achieve the slightly anionic charge window that most papermakers desire The STREAMING CURRENT VALUE and the CHARGE DEMAND are displayed and recorded by the ECT9800 Two 4 20mA outputs per sample line are used to transmit these results The ECT also serves up web pages which can be viewed over an Ethernet connection or dialup 1 2 STREAMING CURRENT AND THE DOUBLE LAYER Surface chemistry and physics are important to papermaking chemistry refining behavior forming and water treatment One branch of surface chemistry is colloidal chemistry the study of a stable combination of particles that are dissolved or suspended in a second substance There are two important aspects of colloidal chemistry the particle sizes on the order of microns and the net charge of these
26. ana i idet 19 3 1 SAMPLE CONNEC TIONS cete ped uses o n a edes ed ri ERE EE 444 19 3 2 AIR AND WATER CONNECTIONS sees nne enne enn nenne nnns 20 3 3 ELECTRICAL CONNECTIONS POWER amp 4 20mA Outputs 22 3 4 COMMUNICATIONS 224322046 eee a erupit neta eacawaien tice ud essa MIN as 23 3 4 1 CONNECTION TO STAND ALONE COMPUTER ere 23 3 4 2 CONNECTION TO STAND ALONE OR MULTIPLE COMPUTERS USING ETHERNET HUB cett netto ortos a araroa EE EROAA ENADO ERENER 24 40 OPERATION ieecetiscackien tins ive e duce preis air be E e a aaa 26 4 1 USING THE DISPLAY TO CONNECT TO THE ECT9800 sss 26 4 2 CHANGING SETTINGS ON THE ECT9800 sss 28 4 2 STARTING AND STOPPING THE ECT9800 essere 29 43 OPERATING MODES 353 1544340064404506 etat Had taa P pa pls ta ea P v m das 30 4 3 CHARGE DEMAND TITRATION essent nennen entrent nene nnns 47 4 3 1 Cationic Anionic Titrant Mode Setup PUMP MODE 47 4 3 2 Dual Cationic Mode Setup PUMP MODE t sssssseee 47 4 3 3 Switch On Empty Pump Mode Mode 3 sse 48 A Ale Titration cci Md PP CES 48 4 4 SETTING PARAMETERS coeire irae ea D uas tea oe ete a as 49 ACA AY Time Setups cs cepe o e eb rd a dou a pH re E ada 49 24 2 Pump SS UU arith saute Ser tain taie qo daa has intu vate sete rent A 5 4 4 3 mput Output Setup u s cotes eee ete ipee tes t nescio quet as ici
27. be normalized to the titrant strength of PUMPI Example PUMP 1 contains 0 005N Dadmac and PUMP 2 contains 0 001N Dadmac When PUMP 1 is used to titrate 1 6 ml the output will be 1 6 ml However if PUMP 2 is used to titrate 5 5 ml the output will be normalized to the stronger normality and will indicate 1 1 ml of titrant consumed 4 3 3 Switch On Empty Pump Mode Mode 3 This mode is used when both titrant jugs contain the same normality titrants Mode 3 will automatically switch from one pump to the other when one of the jugs runs empty 4 3 4 Titration Speed The speed at which the pumps titrate as the reading approaches zero can be changed for each sample line in order to reduce any titration overshoot See section 4 4 ECT Operation Maintenance and Service Manual PAGE 48 4 4 SETTING PARAMETERS 4 4 1 Time Setup Mode Setup System Drain Time Filter Wash Time Chem Injection Time Chem Wash Time Rinse Sensor Time Air Flush Time Collect Sample Time uw D o Fill Aliquot Time Fill Sample Time Sensor Condition Time Stabilizing Time Sample Setup Sample Line s Select e Sample Line s Skip Sample Line s Skip Cycles Max Rsvr Smp Attempts End Start Delay ECT Operation Maintenance and Service Manual PAGE 49 Mode Setup Drain Sample Time shoule be set for 30 to 45 seconds Ensure the time is set long enough to expel all sample and rinse water from the reservoir aliquots and sensor The drain tubing
28. connector located at the end of the cable Scrub the inside cylinder with a test tube brush and water to remove fiber buildup A mixture of a mild abrasive cleaner i e Comet Ajax and water can be used along with the brushing to remove deposits 1 tablespoon of cleaner per 250 mL of water DO NOT ALLOW THE CONNECTOR TO CONTACT WATER The piston can be removed for cleaning by inserting the Piston Removal Tool into the sensor housing and turning the tool counterclockwise You may need to rotate the shaft of the motor 1 2 a turn in order for the tool to come into contact with the piston Note The piston removal tool looks like a probe cartridge but without the yellow cable attached and it should be located in the lower enclosure Return piston probe cartridge and tighten slip nut Reconnect yellow cable connector is keyed and will only go on one way Turn Power back on and start the operation of the ECT9800 FIGURE 13 Sensor and Probe Detail lt _ SENSOR HOUSING lt lt NEOPRENE WASHER ECT Operation Maintenance and Service Manual PAGE 57 5 4 Refilling Chemical Carboy amp Servicing Chemical Pump The Chemical Carboy is typically filled with hot water and detergent e g dishwasher detergent like Cascade It is advised to start off using 1 2 cup of detergent per 5 gallons and increase amount if needed Do not use any type of cleaner that will attack the following mate
29. each sample line Charge Demand Output is used to scale the 4 to 20 mA outputs for each sample line Analog Output Cal is used to calibrate the outputs at 4 12 and 20 mA Set this setting for Normal when not calibrating ECT Operation Maintenance and Service Manual PAGE 53 5 0 MAINTENANCE The following is a general timetable for routine maintenance Every Week to Two Weeks 1 Check titrant levels Section 5 1 2 Check Chemical Carboy level Section 5 4 3 Clean the probe and piston assembly Section 5 3 Every Month 1 Clean filters and check for defects Section 5 2 2 Recalibrate the titrant pumps Section 5 7 Every 6 12 Months Replace fouled tubing Section 5 5 Replace filters Section 5 2 Clean the sample reservoir and check the float switch Section 5 6 Clean valves Section 5 8 Replace Probe amp Piston Section 5 3 Check tubing in Chem Feed Pump Section 5 4 Dy E om US poo ECT Operation Maintenance and Service Manual PAGE 54 5 1 REFILLING TITRANT CONTAINERS There are two 8 Liter titrant jugs on the lower backside of the ECT These jugs will need to be filled with a cationic POLYDADMAC and or an anionic PVSK titrant In most instances anionic titrant is not used To prevent the titrant jugs from running dry it is recommended to refill them when they reach half full Commercially available titrants typically come in one of two strengths either a 001 N ora 005 N Chemtrac
30. each sample line before connecting sample hoses pipes This will simplify maintenance by allowing the user to shut off sample flow to the ECT and also allows for adjusting flow rates and backpressure across the filtering assembly to optimize sample collection Also a water flush line or connection for flush hose installed at or near the sample point is recommended see figure 7 This is recommended for thick stock samples to help clear the sample point or lines if they become plugged with fiber which can happen during extended machine shutdowns At the sample point e g Broke Chest the tap should be 2 ID and have a 2 ball valve installed thin stock samples can be smaller diameter but no less than 1 From the sample point to the ECT either hard pipe or flexible tubing 2 minimum diameter for thick stock should be used for sample delivery On the outlet of the each ECT sample line install pipe or tubing to return stock to an appropriate point in the system e g Machine Chest It is not recommended to send stock to the sewer To reduce or eliminate sample line plugging avoid long runs especially uphill and sharp bends in the sample line when transporting thick stock samples The ECT should be located as closely as possible to thickstock sampling return points and sweeping bends should be used in piping v During the sampling and flushing modes a small amount of air and water are blown into the sample lines The pressure and
31. ed in upper and lower areas of the probe If the piston is moving downward the fluid motion is upward and the attached particles are negatively charged therefore the outer charged layer is positive then the electrical current is traveling from the lower to the upper electrode It should be clear that the STREAMING CURRENT VALUE is dependent on the fluid direction and velocity The resulting signal is an alternating current which is easily separated from constant background DC noise The magnitude of the charge density determines the magnitude of the STREAMING CURRENT VALUE and thus determines the amplitude peak height of the alternating current signal 2 4 SIGNAL PROCESSING The processing of this alternating current is another important aspect of the ECT The current generated in the sensor is on the order of 10 pamps therefore a sensitive amplifier must be used The current generated at the sensor is directly proportional to the piston velocity provided that the particle characteristics are not changing over this time frame The circuitry must change this signal into a constant readable value that is proportional to the amplitude of the original sensor output This is accomplished by performing an accurate RMS measurement of the signal Finally the RMS signal is scaled to the 1000 to 1000 SCV scale The value of this STREAMING CURRENT is relative The instrument is not calibrated to be numerically equal to the actual curren
32. ensed titrant 3 On the navigational bar see figure 2 click on Pump Setup The pump setup screen shown in figure 15 should appear FIGURE 15 Titrant Pump Setup Pump Mode Sample Volume Pump 1 Normality 0 000500 Pump 2 Normality 0 000250 Pump 1 Cal Value 0 060 ml Pump 2 Cal Value 0 080 ml e SL 1 SL2 SL3 2 ml Critical Value 1 2 ml 1 2 ml 1 Pump 2 mL Readout Normalized Value Titrant Pump Cal Prime Select Pump 1 Calibrate Prime e Deadband Max Pump Strokes Pump Strokes Titrant Pump Stroke Freq vs Charge Value 4 Next to where it says Titrant Pump Cal Prime Select ensure the system is set to calibrate Pump 1 If your screen shows Pump 2 then right click on the button showing Pump 2 and a command prompt will come up asking you which pump you wish to calibrate select Pump 1 ECT Operation Maintenance and Service Manual PAGE 60 5 Next right click on the Prime Button and select Priming On from the drop down list Allow the Pump to stroke at least 25 strokes and ensure all the air is out of the calibration port and any attached tubing and that titrant is coming out of the port 6 Next empty out the 10 mL graduated cylinder and place it back underneath the calibration port or if tubing is attached to the port insert the tubing into the graduated cylinder Then right click on the Calibrate button and wait for the Pump to stroke 50 times The Pump will stop on its own when it reaches 50 str
33. flow rate in the sample line does rapidly increase in short burst when air water is blown through the filter and into the sample line Therefore all flexible tubing used to transport samples to and especially away from the ECT must be secured A backflow preventer may be installed on the ECT Inlet to reduce pressure fluctuations caused by the ECT flushing the filter with up to 40 psi of air amp water at the point of sampling A backflow preventer is recommended on Headbox samples Installation of backflow preventers is the responsibility of the mill ECT Operation Maintenance and Service Manual PAGE 19 FIGURE 7 Recommended Connections SAMPLE POINT __ INSTALL 1 TO 2 BALL VALVES cuiii NOT SUPPLIED WITH UNIT 2 MNPT SAMPLE 2 MNPT SAMPLE CONNECTION CONNECTION FLUSH WATER VALVE 1 2 FNPT WATER INLET Q m 2 FNPT AIR INLET CONNECTION CONNECTION 32 AIR AND WATER CONNECTIONS Connect clean instrument quality air to the air filter assembly 1 2 FNPT shown in FIGURE 7 using a minimum ID piping or hose The maximum pressure is 100 psi and the minimum pressure required for proper operation of the ECT is 60 psi Connect clean potable water to the filter regulator 1 2 FNPT as indicated in FIGURE 7 using a minimum 4 ID piping or hose The maximum pressure is 80 psi and the minimum pressure is 30 psi The system drain is located underneath the bottom enclosure A 1 hose barb connection is
34. hanges simply click on the Cancel button Using the Mouse and the Right Click button is how the user first accesses and then makes changes to any settings on the ECT9800 interface screens The important thing to remember is that links to different pages require the user to Left click and making changes to the settings require the user to first Right click 4 2 STARTING AND STOPPING THE ECT9800 There is a master power switch on the exterior left side of the unit If the ECT9800 needs to be stopped immediately this switch should be set to the OFF position To power the ECT9800 back up simply turn the power switch back to the ON position NOTE If the ECT is Running when the power switch is set to the Off position the ECT will resume running when the unit is turned back on It will take at least 2 to 3 minutes for the ECT to Boot Up after it has been turned off During this Boot Up period the user cannot access the web pages So if the unit was running when it was shut off and you wish ECT Operation Maintenance and Service Manual PAGE 29 for it to not resume running when it is powered back up it is recommended to shut off instrument air until the web pages can be accessed to properly shut off the ECT9800 There are Start Stop buttons on the Status and Monitor Screens On the Monitor screen as shown in figure 19 the Start Stop button is located on the top left hand side of the screen Right next to the Start S
35. harge demand may require slow pump speeds e g 4 sec 8 sec and 16 sec to prevent an overshooting of the endpoint while samples with high demands may require faster pump speeds at the start to ensure the titration is completed in a timely manner 4 4 3 Input Output Setup Display Auxillary Inputs Charge Demand Units 4mA 20mA mE NM Conductivity Turbidity Turbidity Sample Line 4 20mA Output Scaling Charge Demand Units 4mA 20mA Streaming Current 1 Charge Demand 1 Streaming Current 2 Charge Demand 2 Streaming Current 3 Charge Demand 3 PH Conductivity Analog Outputs Cal ECT Operation Maintenance and Service Manual PAGE 52 Display Auxillary Inputs Charge Demand Units determines how the charge demand values are displayed The choices are meq ueq or mL PH Conductivity and Turbidity are all options that may or may not have been supplied with your unit If any of these Auxillary sensors were supplied then activate the sensor by Right clicking on the gray box with the Sensor s type e g PH Conductivity To the right of the gray box are the 4 and 20 mA scaling prompts for the sensor The values in these prompts must match what the analyzers are actually scaled for 4 20mA Output Scaling Charge Demand Units is used to determine whether you wish to output the Equivalents value meq or peq or the mL value Streaming Current Output is used to scale the 4 to 20 mA outputs for
36. inder Optional Equipment pH amp Conductivity Analyzer Power Requirements 115VAC 60Hz Optional 230VAC 50Hz Environmental Temperature 40 to 150 F 4 to 65 C Sample 0 to 4 consistency 10 to 50 gallons min 40 to 190 L min pH range 3 to 9 Conductivity range 0 1 to 3 mS cm Temperature range 40 to 150 F 4 to 65 C Deliver to ECT and return to the process Sample Connections 2 MNPT sample inlet for each sample line 2 MNPT sample outlet for each sample line Optional 2 ball valve on sample inlet outlet Instrument Water Filtered or potable Pressure 30 80 p s i Connection 2 FNPT Consumption appr 5 gallons 19L per hour Temperature 60 to 150 F 15 to 65 C Instrument Air Pressure 60 100 psi Connection 2 FNPT ECT Operation Maintenance and Service Manual Dimensions 26 W x 30 D x 70 H 61cm x 61cm x 178cm 200 Ibs 91kg Enclosure Two NEMA 4X 304 Stainless Steel Materials in Contact with Sample Delrin Teflon Neoprene Viton PVC 316 Stainless Steel Measured Parameters Streaming Current Charge Charge Demand mL peq meq Optional pH conductivity Rate 7 to 15 minutes per sample line Output Signals Web Browser Enabled 802 11b or direct Ethernet connection 4 20mA 250Q Load two outputs per sample line for SCV and Charge Demand With pH analyzer one additional output per sample line With conductivity analyzer one additional output per sample line Six 6
37. ipt of written notice from the customer Chemtrac Systems Inc shall repair or replace at the discretion of Chemtrac Systems Inc the defective equipment or components Chemtrac Systems Inc assumes no responsibility for equipment damage or failure caused by A Improper installation operation or maintenance of the equipment B Abnormal wear and tear on moving parts caused by some processes C Acts of nature i e lightning flooding etc This warranty represents the exclusive remedy of damage or failure of the equipment Under no circumstances shall Chemtrac Systems Inc be liable for any special incidental or consequential damage such as loss of production profits or product quality The warranty cannot be guaranteed if the customer fails to service and maintain the equipment in accordance with Chemtrac System s written instructions and policies as stated in the Operations Manual ECT Operation Maintenance and Service Manual 1 0 GENERAL INFORMATION The Electrokinetic Charge Titrator ECT is an online charge analyzer and automatic titrator The charge and charge demand can be quantified for 3 sample lines up to 4 consistency This instrument is used to determine wet end charge trends as well as the effects of various additives on system charge Therefore the ECT is a useful tool for assessing and improving process efficiency 1 1 STREAMING CURRENT AND CHARGE DEMAND For a pulp sample or an
38. mL after the jugs have been refilled ECT Operation Maintenance and Service Manual PAGE 46 4 3 CHARGE DEMAND TITRATION CHARGE DEMAND quantifies the number of charges in a volume of furnish As explained in Section 1 1 a titration is performed on the sample by adding a polymer titrant of opposite charge and known charge density Therefore the CHARGE DEMAND may be expressed in mL of titrant consumed by the sample Since the titrant charge density titrant normality with units of equivalents L is also known the CHARGE DEMAND may be converted from mL to milliequivalents L meq L or microequivlanents L ueq L Titrant Consumed mL Titrant Normality eq L 1000 CHARGE DEMAND meq L Sample Volume mL For ueq L the above formula uses a multiplier of 1 000 000 Section 4 4 Setting Parameters explains how to display the CHARGE DEMAND in either mL or equivalents Additionally Section 4 4 explains how to switch the ECT between two different PUMP MODES The two different modes are explained in the following subsections 4 3 1 Cationic Anionic Titrant Mode Setup PUMP MODE The Cationic Anionic mode Pump Mode is desired when the incoming samples to be tested have the potential to be cationic or anionic In this mode the ECT will use PUMP 1 to titrate an anionic sample with cationic polymer PUMP 2 will be used to titrate a cationic sample with anionic polymer Ensure that the titrant containers are filled
39. mp 1 and Pump 2 Normality are the strengths of the titrant If using Pump Mode the stronger normality must be used in Pump 1 Pump 1 and Pump 2 Cal Value are the volume per stroke from the respective pumps These are set during the Pump Calibration Critical Value is shown only when the Pump mode is The critical value determines when Pump 2 is used If Pump 1 is used but the volume drops below the critical value the next titration on that sample line will use Pump 2 the weaker titrant ECT Operation Maintenance and Service Manual PAGE 51 Deadband is used to prevent the titration from going back and forth between Pump 1 and 2 when the demand is right at the critical value In order to go back to Pump 1 Pump 2 must deliver a normalized volume of titrant that exceeds the critical value deadband volume Titrant Pump Selection is used to determine which pump is to be calibrated The Initiate button will activate the pump for 50 strokes This function is also used to prime the pump if necessary When calibrating the pump collect the sample in the 10 mL graduated cylinder and measure the volume once the 50 strokes are finished Divide the volume by 50 to get the stroke volume Enter this value as the Pump Cal Value Titrant Pump Stroke Freq vs Charge Value is used as a speed control for the pumps during titration The pumps are capable of stroking at 5 different speeds 1 sec 2 sec 4 sec 8 sec and 16 sec Sample with low c
40. nd the bulk solution that is in ionic equilibrium Whether streaming current or zeta potential is being measured addition of an oppositely charged electrolyte will cause the slip plane to contract towards the particle surface As the slip plane contracts the STREAMING CURRENT VALUE and zeta potential will become less negative Eventually the isoelectric point will be reached which is defined as a STREAMING CURRENT VALUE or zeta potential equal to zero At the isoelectric point the solution is considered neutral no net charge If additional electrolyte is added the system will become net cationic Adding electrolyte to the sample is detailed in Section 4 3 ECT Operation Maintenance and Service Manual 8 FIGURE 1 The Double Layer MSS Positively charged Negatively charged e e eo o H Colloid with high Charge 2 u ae Q Ionic e 7 density equilibrium Stern Layer Diffuse Layer _ ECT Operation Maintenance and Service Manual 9 2 0 SPECIFICATIONS AND COMPONENTS 2 1 SPECIFICATIONS Standard Features ECT 9800 measures 3 sample lines e g Tray Water Headbox Thickstock up to 4 Two 2 titrant pumps Cationic Anionic Chemical Wash Equipped Touch Screen Display Highly reliable thickstock sampling Operation and Service Manual Spare parts kit 1 filter 1 probes 1 pistons 1 viton seal 1 O Ring kit 1 Cleaning brush 1 Piston tool 1 Pilot valve 1 Graduated cyl
41. nse Sensor Time System Drain Time Air Flush Time Collect Sample Time Fill Aliquot Time Fill Sample Time Sensor Condition Time Stabilizing Time Sample Setup Sample Line Select Max Rsvr Smp Attempts End Start Delay 4 2 CHANGING SETTINGS ON THE ECT9800 Changing settings involves using the Right click function on your mouse this function is accessible on the display by pressing on the lower right hand toolbar Move the pointer over the setting you wish to change and Right click Hint a red outline will appear over the settings which can be changed by the user you must right click to change the settings not left click After you have Right click on the setting a message box like the one shown in figure 17 where it says SET will appear The next step is to Left click on the message box Left click not Right click Once this has been done another box will appear on the screen see figure 18 ECT Operation Maintenance and Service Manual PAGE 28 FIGURE 18 Mode Setup Drain Sample Time 45 Ok Cancel Filter Wash Time Rinse Sensor Time System Drain Time Air Flush Time Collect Sample Time Fill Aliquot Time Fill Sample Time Sensor Condition Time Stabilizing Time Sample Setup Sample Line Select Max Rsvr Smp Attempts End Start Delay Simply type in the new setting into this prompt and Left click on the OK button to save the changes If you do not wish to save the settings or make any c
42. nternally sourced and isolated with a maximum load of 2500 ECT Operation Maintenance and Service Manual PAGE 22 3 4 COMMUNICATIONS The ECT9800 is equipped with a Web Access Controller WAC The WAC is an imbedded PC with Windows NT operating system running a software that allows the user to access and control the ECT s operation through web browser enabled graphics The WAC is network ready equipped with an Ethernet network interface card 10 Base T and it uses Windows NT security The WAC can also be accessed through a single computer via Ethernet cable or a Local Area Network computer There is no special software required to interface to the WAC as it serves up information via standard Web pages The only software requirement is a web browser such as Internet Explorer or Netscape Navigator Figures 11 through 14 show the different options for setting up communications to the WAC figure 12 shows how the communications are set up from the factory 3 4 1 CONNECTION TO STAND ALONE COMPUTER An Ethernet network interface card 10 Base T with RJ 45 jack for Cat 5 network cable is required on the laptop or desktop computer The WAC is equipped with an Ethernet connection as shown in Figure 11 Crossover Ethernet not straight thru cable must be used to direct connect the WAC and the computer FIGURE 11 Direct connection between PC and the WAC using a Crossover Cable Crossover Cable La
43. okes The green background will return to gray in color when the calibration is finished 7 Hold the 10 mL graduated cylinder at eye level and measure the total volume dispensed normally this will be between 3 to 4 mL Record the result and repeat Step 7 8 You should now have two results If the results are within acceptable limits 2 mL then take the final result and enter it into the Pump 1 Cal Value field Simply right click on the field and a message box will appear allowing you to type in the result 9 NOTE If the dispensed volumes do not match up within 2mL perform the calibration 2 more times If the 3 and 4 results match up within 2 mL of the znd result then use the last result to calculate the per stroke volume or calibration value If they do not agree within 2 mL of each other contact the factory to discuss pump replacement 10 NOTE If the new calibration value does not agree within 4 mL of the old value it is recommended to perform the calibration again in one week to verify the Pumps output is not becoming unstable which can be caused by worn seals in the pump If a follow up calibration is performed within 1 to 7 days of the original calibration the results should agree to within 2 mL of each other If you suspect a Pump is becoming unstable contact the factory for assistance 11 NOTE The dispensed volume for the calibration should be maintained above 2 5 mL If the volume drops off below 2
44. range will ensure optimum resolution on the results however larger dispensing volumes may be required for highly anionic samples to ensure titrations do not take more than 3 minutes ECT Operation Maintenance and Service Manual PAGE 62 FIGURE 16 s8x0415 5f 1u uonsog asiwep0 2 19 uno n J WOI Maias juauugsnfpy uo SUN JO 9 SiS GG SCG G Grp Gy Ger p GLE GE Gee Gite Ge SCC ZT Gib GL Seb SiO SO Seo 0 Th j j ul h p M T S iil uL E 16 1A e bc Y D Nu IA Pl N jjaBue1 siu 10 jsn py JON og auey papuawiwosay ijafue siu 10 jsnfpy JON og auinjoa Buisuedsig dung uey L 123 5340145 09 Jad jue jo qu PAGE 63 ECT Operation Maintenance and Service Manual 5 8 VALVE CLEANING PROCEDURE There are four types of valves used on the ECT but only two of which will require cleaning The Lever Action valve Valves 4D 4P 5 6 and 7 and a Diaphragm Valve Valve 9 3 Before any of these valves are to be cleaned the systems needs to be turned off and both the air and water lines going to the unit should be shutoff LEVER ACTION VALVES TYPE 330 VALVE Special attention should be given to Valve 4D This valve could require cleaning every 3 to 6 months This valve is located on top of the reservoir and serves as a vent for the reservoir If this valve gets plugged the ECT will either not be able to collect a sample or it will take several attempt
45. ration Maintenance and Service Manual PAGE 24 o WAC IP Address 10 10 10 100 o Subnet Mask 255 255 255 0 o Default Gateway Blank Do not set the computers address for the following IP settings o 10 10 10 100 WAC IP address An acceptable IP address for the computer would be anything between 10 10 10 10 to 10 10 10 90 Subnet Mask needs to be 255 255 255 0 FIGURE 14 Internet Protocol TCP IP Properties 10 10 10 50 255 255 255 0 gt Geta DNS server address automatically 9 ECT Operation Maintenance and Service Manual PAGE 25 4 0 OPERATION 4 1 USING THE DISPLAY TO CONNECT TO THE ECT9800 Using the Touchscreen Display or a standalone PC after you have properly configured your computer s IP configuration open the web browser and type in ECT9800 or 10 10 10 100 into the address bar If the Touchscreen Display is on the Log In screen simply press on ECT9800 A username and password screen will appear The username and password that allow complete access to the ECT s controls are different for every installation and should have been given to the main customer contact during commissioning of the unit contact Chemtrac if the security information is forgotten For general access a username of ect and a password of 9800 can be used the username and password are case sensitive FIGURE 15 FA ECT User name ect Password eece
46. rials Teflon Delrin EPDM Viton PVC Stainless Steel The chemical feed pump is a peristaltic pump and the tubing will need to be replaced approximately once every 2 to 3 years Contact the factory for ordering information 5 5 REPLACEMENT OF PLASTIC TUBING Although the plastic tubing seldom needs replacement special circumstances may arise that warrant this procedure Before servicing any tubing disconnect the power turn off the air and water supplies and bleed off back pressure from the air and water connections Both pressure gauges should read 0 psi To remove the tubing press the quick release receptor away from the tubing and simply pull the tubing out Cut a new piece of tubing to the same length as the old a piece and insert the tubing ECT Operation Maintenance and Service Manual PAGE 58 5 6 RESERVOIR AND FLOAT SWITCH CLEANING A float switch is used inside the sample reservoir to detect the volume of filtrate during the sampling modes Buildup or damage to the switch can interfere with the operation of the ECT FIGURE 14 Reservoir Detail v SAMPLE RESERVOIR lt lt _ GASKET SEAL A E CLAMP LEVEL SWITCH Stop the ECT Remove clamp on reservoir and lower bottom portion containing level switch Clean switch and inner walls of the reservoir Raise and lower float of switch Float should move freely On the Status page check to ensure the reservoir graphic turns blue when the float switch is held up
47. s e g greater than 10 to get a sample Valves 5 and 6 can also require some cleaning normally once every 6 to 12 months Valves 4P and 7 should never require cleaning as they are used to control instrument air and flush water and do not come into contact with the furnish Before cleaning a Lever Action valve be sure to note the direction of the actuator coil because putting it back on 180 degrees backwards will cause the valve to not work properly To avoid putting the actuator coil on backwards take note which way the manual override button is pointing in reference to the valve seat and put it back on the same way when finished cleaning the valve Also be sure not to lose the isolation diaphragm and support plate when taking the valve apart Once the valve has been taken apart simply clean the isolation diaphragm and the valve seat Use as small brush pipe cleaner or Q Tip to clean out the valve seat For Valve 4D use the spray gun to flush out the valve seat and fittings It may be necessary to unscrew the valve seat from the piping so the ports can be fully cleaned out to remove any plugging Screws Qty 4 Manual Override Actuator Coil Support Plate Isolation Diaphragm ECT Operation Maintenance and Service Manual PAGE 64 5 9 PARTS LIST AND ORDERING INFO Part Number Description lt 5 YEARS REPLACEMENT INTERVAL Probe Block Assembly Parts 8601 Probe 1701 Piston 8701 Probe Washer 1605 Probe O ring 7701 A Do
48. s 52 SOMAINTENANCE tc eus e ee a Rite ta tad vnd me s 54 5 1 REFILLING TITRANT CONTAINERS 2 25 ietixeatk qus betonen tpa cab iocus 55 5 2 FILTER REMOVAL AND CLEANING eere nennen enne enne 56 5 3 PROBE REMOVAL AND CLEANING essere 56 5 3 Probe and Piston Removal and Cleaning sese 5T 5 4 Refilling Chemical Carboy amp Servicing Chemical Pump ssss 58 5 5 REPLACEMENT OF PLASTIC TUBING anh Qepbe cteddsiunceatebutdeeteh uabeacctedonans 58 5 6 RESERVOIR AND FLOAT SWITCH CLEANING ene 59 S TITRANT PUMP CALIBRATION decetero io hat eee nt eain eie eene tn 60 ECT Operation Maintenance and Service Manual 4 SYMBOL KEY Do Not Perform This Function Risk of Electric Shock Note Unplug Equipment SAFETY PRECAUTIONS BEFORE ATTEMPTING TO UNPACK SET UP OR OPERATE THIS INSTRUMENT PLEASE READ THIS ENTIRE MANUAL CERTAIN THE UNIT IS DISCONNECTED FROM THE POWER SOURCE BEFORE ATTEMPTING TO SERVICE OR REMOVE ANY COMPONENT FAILURE TO FOLLOW THESE PRECAUTIONS COULD RESULT IN PERSONAL INJURY AND DAMAGE TO THE EQUIPMENT ECT Operation Maintenance and Service Manual 5 WARRANTY INFORMATION Warranty Chemtrac Systems Inc warrants its product to be free of defects in material and workmanship for a period of one 1 year from date of shipment to the original customer Upon rece
49. t or charge density that exists in the sensor primarily because the calibration would be sensitive to small differences in the physical ECT Operation Maintenance and Service Manual PAGE 16 dimension of the annulus and the chemistry of the sample e g pH Conductivity Another reason the instrument is not calibrated to display a discrete charge value is that the instrument is sensitive to differences in charge distributions that vary from simple systems to complex systems However the unit includes a sensitivity adjustment that amplifies the original signal Also the ECT has a gain setting that allows the output to be varied by a factor of up to 20 times the primary signal 2 5 ECT9800 USER INTERFACE The Touch Screen Display located on the upper enclosure of the ECT is the primary user interface By typing the name or IP address of the Web Access Controller i e ECT9800 or 10 10 10 100 into the web browser Internet Explorer user interface screens as shown in Figure 6 can be accessed These screens allow the user to start and stop the unit change the ECT s parameters and perform functions such as calibrating the titrant pumps FIGURE 6 Web Browser User Interface E Untitled Document Microsoft Internet Explorer File Edit View Favorites Tools Help Qe X x x F IN JO search Favorites A Media Ol C3 gt E LJ Address http ECT9800 stations ECT Index htm ECT 9800 Sample Line 1 Sample Line
50. top button is an indicator of the state of the ECT This indicator will either say Running or Stopped To start the ECT Right Click on the Start Stop button Left click on the Command button and then select Start from the prompt and Left click on the OK button To stop the ECT use the same procedure but select Stop from the prompt FIGURE 19 seston PASC aE System Status Gain Setting 1X S Line Selection 21 42 49 21 47 49 Alarms None 450 0 Sample Line 1 Sample Line 2 Sample Line 3 Stabilized Charge Stabilized Charge Stabilized Charge Streaming Current Streaming Current Streaming Current 360 o Charge Demand Charge Demand Charge Demand P1 ueq ueq ueq 4 3 OPERATING MODES When Start is selected from the Start Stop button the unit will begin operation Each operating mode will always occur in the order given in TABLE 1 ECT Operation Maintenance and Service Manual PAGE 30 TABLE 1 OPERATING MODES 1 DRAINING SAMPLE 2 WASHING FILTER 3 SENSOR CHEMWASH 4 DRAINING SYSTEM 5 COLLECTING SMPL 6 FILLING ALIQUOT 7 FILLING SENSOR 8 CONDITIONING 9 DRNNG CND SMPL 10 COLLECTING SAMPL 11 FILLING ALIQUOT 12 FILLING SENSOR 13 STABILIZING 14 TITRATING OPERATIONAL DELAY ECT Operation Maintenance and Service Manual EXPLANATION OF OPERATION Any extraneous liquid in the system is drained Air and water are used to clean the filter The sensor is
51. uble Thick Viton Seal 3707 Rod End 5710 Yoke 13189 Titrant Pump 13902 Sample Line Filter 13192 PH Probe Optional BELOW PART S FOR REFERENCE ONLY NOT PART OF SPARES LIST 1308 Opto Switch 13194 Conductivity Probe 13550 Float Switch 5470 110V Drive Motor 330X Crank For Large Motor Valves 13185 Lever Action Valve V4D V4P V5 V6 amp V7 13171 Angle Seat V1 V2 V3 V8 V10 V11 V12 134076P Coil for 8 position manifold pilot valves 9925340024 160W 24 VDC Power Supply 9928890024 24W 24 VDC Power Supply EC181 T O Nodes WAC Web Access Controller F5D6130 Wireless Access Point To get pricing and to order any of the above parts contact Chemtrac Systems at 800 442 8722 or 770 449 6233 ECT Operation Maintenance and Service Manual PAGE 65
52. washed with a chemical i e bleach and then rinsed with water Water from the rinsing mode is drained The filter is flushed with air then the filtrate drains into the reservoir This is repeated until the level detector is activated Filtrate in the reservoir is delivered into the aliquot Excess filtrate goes to drain The aliquot dispenses filtrate into the sensor The first sample taken is used to condition the sensor The conditioning sample is drained from the system The filter is flushed with air then the filtrate drains into the reservoir This is repeated until the level detector is activated Filtrate in the reservoir is delivered into the aliquot Excess filtrate goes to drain The aliquot dispenses filtrate into the sensor The system pauses to allow the sensor to obtain a stable reading before titration begins Depending on the operating parameters and SCV the ECT delivers titrant from PUMP1 or 2 until the SCV equals zero If an end start delay time is entered there will be a delay between line sampling PAGE 31 FIGURE 20 System Schematic Sample Line 1 Sample Line 2 Sample Line 3 Filter Filter vn pK v v A A V10 V12 Water Reg Air Reg e 4 QO X X C9 Filter v vat A V4P Mini Air Reg H Check Valve System Valves Function V1 Filter Air Purge Rinse Sensor and Reservoir V2 Filter Water Purge Fill Aliquot Dispenser V3
53. y aqueous solution the ECT measures the STREAMING CURRENT VALUE SCV a term which is commonly interchanged with charge or charge measurement The ECT filters pulp through a screen to obtain a sample suitable for the STREAMING CURRENT sensor It is assumed that a STREAMING CURRENT is generated by electrically charged particles in the sample that are momentarily attached to the cylinder walls within the probe A reciprocating piston causes fluid motion which shears the loosely bound counter ions away from the particles attached to the cylinder walls Electrodes in the cylinder measure this current generated by the sheared counter ions The signal is electronically processed and the output is the SCV The loosely bound counter ions mentioned above are a component of the double layer This double layer concept is described in Section 1 2 Both STREAMING CURRENT and zeta potential are based upon the double layer principle Therefore the STREAMING CURRENT VALUE produced by the ECT is comparable to the well known zeta potential The ECT also measures the CHARGE DEMAND of a sample by performing a titration The pulp filtrate is titrated using a cationic or anionic polymer titrant of opposite charge and known charge density The results indicate the volume of titrant required to reach aSTREAMING CURRENT VALUE of zero which means the sample has no net charge This provides information about the sample s ability to absorb
Download Pdf Manuals
Related Search