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Summary of Contents for Chemtrac SCM2500XRD
- Page 1 OPERATIONS MANUAL SCM2500XRD SCC3500XRD Streaming Current Monitor & Streaming Current Controller with Dura-Trac Remote Sensor ™ R 4 8/2/06 RA...
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Page 3: Table Of Contents
2.5.1 Dura-Trac with Flush ............... 2.5.2 Sensor Maintenance Module ............OPERATION ..................Monitor/Controller User Interface ............... SCM2500XRD Readout, Menus and Controls ........... 3.2.1 SCM2500XRD Main Screen ............3.2.2 SCM2500XRD Setup Menu (1)............3.2.3 SCM2500XRD Setup Menu (2)............3.2.4 SCM2500XRD Alarm Status Menu .......... - Page 4 Dura-Trac Sensor Parts Identification ............... Dura-Trac II Sensor Parts Identification ............Streaming Current Monitor/Controller Dimensions ..........Dura-Trac Sensor Dimensions................Dura-Trac II Sensor with SMM Dimensions............Dura-Trac Sensor with Flush Dimensions ............Dura-Trac II Sensor Dimensions............... SMM Dimensions ..................Chemtrac Systems, Inc. Page 3...
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Page 5: Important Instructions
In order to provide maximum user safety this instrument was designed with all electrical circuitry enclosed within a protective non-conductive housing. The label below will be visible at any location where high voltage is present. Chemtrac Systems, Inc. Page 4... -
Page 6: Warranty Information
(1) year from date of shipment to the original purchaser. Upon receipt of written notice from purchaser, seller shall ® repair or replace the equipment (at option of Chemtrac Systems, Inc.). ®... -
Page 7: General Information
The time required for this neutralization process to go to completion is primarily a function of mixing, time, raw water characteristics, type of coagulant, and to a lesser Chemtrac Systems, Inc. Page 6... -
Page 8: Streaming Current Profile
1. Point or points of coagulant feed. 2. Mixing efficiency of raw water and coagulant. 3. Magnitude of raw water flow swings. 4. Type and quantity of coagulants used. FIGURE 1. Streaming Current Profile Chemtrac Systems, Inc. Page 7... -
Page 9: Process Control Procedures
This period, if using the monitor with a recorder for monitoring, is also a good time to determine the optimum coagulant dosage and establish the operating “setpoint”. This enables the system to be put on automatic control very simply. Chemtrac Systems, Inc. Page 8... -
Page 10: System Components
SYSTEM COMPONENTS The SCM2500XRD and SCC3500XRD system include the following: Monitor/Controller Dura-Trac Remote Sensor Dura-Trac Remote Sensor with Flush (Optional) Dura-Trac II Remote Sensor (Optional) Sensor Maintenance Module (Optional) Figure 2 illustrates system components. MONITOR/CONTROLLER SEMSOR MAINTENANCE MODULE SCC3500XRD Power Service Diag. -
Page 11: Technical Specifications
Sample Flow Rate ....5.0 GPM Sample Cell Type ....External Receiver, High Flow Probe Type......Quick Replacement Cartridge Water Sample Connections..Inlet: 3/4” O.D. Barb Type, Outlet: 1” O.D. Materials Contacting Sample... Delrin, Nylon, Neoprene Viton, PVC, Stainless Steel Chemtrac Systems, Inc. Page 10... - Page 12 Enclosure Type ....... NEMA 250 Type 4X, Reinforced Fiberglass Module Size ......11.2”W, 9.2”H, 6.3”D (285mm W, 234 mm H, 161mm D) Mounting Holes ....... 9.7”W x 10.5”H (247mm W x 266mm H) Weight........6 Pounds (2.72 kg) Chemtrac Systems, Inc. Page 11...
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Page 13: Mounting And Installation
In cases where potential noise sources could affect the performance of the equipment, a "surge suppressor" must be installed with the unit. The following drawings show power terminal connections for models SCM2500XRD and SCC3500XRD monitors, and Dura-Trac or Dura-Trac II Sensor. -
Page 14: Dura-Trac Sensor Power Wiring
9 10 FIGURE 4. Dura-Trac Sensor Power Wiring 9 10 FIGURE 5. Dura-TRAC II Sensor Power Wiring Chemtrac Systems, Inc. Page 13... -
Page 15: Signal Wiring
TURN POWER OFF BEFORE MAKING ANY WIRE CONNECTIONS 19 20 TO AVOID DAMAGING THE ELECTRONIC CIRCUIT. (BLACK) CHEMICAL PUMP (BROWN) FLUSH VALVE (RED) SAMPLE ISO VALVE (WHITE) 24 VDC COMMON FIGURE 6. Signal Wires Interconnection Diagram Chemtrac Systems, Inc. Page 14... -
Page 16: Sample Connection
(see Flush Menu). DURA-TRAC PATENTED MADE IN U.S.A. SAMPLE OUTLET SAMPLE INLET 3/4" BARB FITTING PVC Drain 4" Cup Funnel 2" Line FIGURE 7. Dura-TRAC Sensor Sample Connection Chemtrac Systems, Inc. Page 15... -
Page 17: Sensor Flush Options
FIGURE 8. Dura-TRAC II Sensor Sample Connection SENSOR FLUSH OPTIONS The SCM2500XRD and SCC3500XRD are available with one of two options for automatic sensor flushing/cleaning. The first option is the Dura-Trac with flush and is composed of a valve mounted onto the Dura-Trac sensor, which is connected to flush water. -
Page 18: Sensor Maintenance Module
PROBE FLUSH outlet quick-connect fitting on the SMM and the PROBE FLUSH assembly quick connect fitting on the Dura-Trac II Sensor. Connect an appropriate length ¼’’ semi-rigid Teflon tubing between the “Chemical Rinse” PUMP INLET quick connect fitting on the SMM and the chemical carboy. Chemtrac Systems, Inc. Page 17... -
Page 19: Smm Tubing Connections To Dura-Trac Ii Sensor
R Acid concentration shall not exceed 15% concentration. SENSOR MAINTENANCE MODULE (SMM) DURA-TRAC II CHEMTRAC SENSOR SYSTEMS, INC. DURA-TRAC PATENTED MADE IN U.S.A. PINCH VALVE 25 PSI CARBOY CHECK TANK VALVE FIGURE 11. SMM Tubing Connections to Dura-Trac II Sensor Chemtrac Systems, Inc. Page 18... -
Page 20: Operation
At this point, the new parameter has not been saved. After all parameters modification are completed, press the SAVE function key to accept the change or press the MAIN function key to discard the changes. Chemtrac Systems, Inc. Page 19... -
Page 21: Scm2500Xrd Readout, Menus And Controls
SCM2500XRD READOUT, MENUS, AND CONTROLS The menu system for the SCM2500XRD is simple to navigate, below you will find the different screens accessible through the function keys (SETUP, ALARM, and FLUSH): 3.2.1 SCM2500XRD Main Screen The MAIN screen on the SCM2500XRD is the screen used under normal operation of the instrument. -
Page 22: Scm2500Xrd Setup Menu (1)
3.2.2 SCM2500XRD Setup Menu (1) From the MAIN screen, press SETUP function key, the SETUP screen will display. Within the SETUP screen menu, the GAIN, OFFSET, and SCV ALARMS settings can be modified. “ Definitions Sensor Gain: Signal amplification factor, adjustable from 1X to 20X. The gain should be adjusted so that a regular change in dosage results in a noticeable deviation (e.g. -
Page 23: Scm2500Xrd Setup Menu (2)
SAVE Function Key – Pressing this key will save current setting modifications and brings up the MAIN screen. 3.2.3 SCM2500XRD Setup Menu (2) From the SETUP MENU (1), continue pressing the down arrow key until SETUP MENU (2) menu screen display. SETUP MENU (2) menu screen is a continuation of the SETUP MENU (1) menu screen. -
Page 24: Scm2500Xrd Alarm Status Menu
3.2.4 SCM2500XRD Alarm Status Menu From the MAIN screen, press ALARM function key, the ALARM STATUS screen will display. Within the ALARM STATUS menu you can view which Alarm has been triggered, as well as, turn the Monitor/Controller’s audible alarm feature on and off. -
Page 25: Scm2500Xrd Flush Control Menu
A Lo Alarm signify an underfeed of chemical (even possible loss of chemical feed) and a Hi Alarm signify an overfeed. 3.2.5 SCM2500SRD Flush Control Menu This flush feature is an option that is available for the SCM2500XRD, see Section 3.3.7 for detail description. SCC3500XRD READOUT, MENUS, AND CONTROLS The menu system for the SCC3500XRD is simple to navigate;... -
Page 26: Scc3500Xrd Setup Menus
From the MAIN screen, press SETUP function key, the SETUP screen will display. Within the SETUP screen menu, the GAIN, OFFSET, SCV ALARMS, and SCV Filter settings can be modified. The SETUP Menus are the same for SCM2500XRD and SCC3500XRD see Sections 3.2.2 and 3.2.3 for detail descriptions. -
Page 27: Scc3500Xrd Alarm Status Menu
There are two audible alarm sound lever; high and low. When the audible alarm is enabled and alarm condition occurs, high-level beep will be generated. The method of acknowledging the alarm is to press the Chemtrac Systems, Inc. Page 26... -
Page 28: Scc3500Xrd Pump Control (1) Menu
When running in Automatic mode, the Man Output setting is ignored. However, when switching from AUTO to MAN, it is important to understand that the Pump Output value will be changing from the value it was in MAN mode. Chemtrac Systems, Inc. Page 27... - Page 29 MAIN Function Key: Pressing this key will ignore any setting modifications on this screen and brings up the MAIN screen. SAVE Function Key: Pressing this key will save current setting modifications and brings up the MAIN screen. Chemtrac Systems, Inc. Page 28...
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Page 30: Scc3500Xrd Pump Control (2) Menu
Pump Control (2) menu screen. When ENABLED, the FLOW CONTROL function allows the user to control the chemical feed based on the process FLOW rate and the Streaming Current Value PID control Chemtrac Systems, Inc. Page 29... - Page 31 The percent (%) value can be changed from 0 to 100% at 0.1% increment. MAIN Function Key: Pressing this key will ignore any setting modifications on this screen and brings up the MAIN screen. Chemtrac Systems, Inc. Page 30...
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Page 32: Scc3500Xrd Flush Control Menu
60 seconds (30 seconds for each flush). The value can be increased or decreased by pressing the p or q key. The value can be changed from 1 to 99 at 1 second increment. Chemtrac Systems, Inc. Page 31... - Page 33 This can be done at anytime regardless of the Auto Flush mode. SAVE Function Key – Pressing this key will save current setting modifications and brings up the MAIN screen. Figure 11 shows the timing diagram of the Sensor Flush. Chemtrac Systems, Inc. Page 32...
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Page 34: System Operation
It is recommended to set the Lo SCV Alarm value (see Alarm setup menu) between the Raw SCV measurement and the setpoint value. Further testing will help to Chemtrac Systems, Inc. Page 33... -
Page 35: Treatment Optimization Procedure
This setpoint will remain very close to the same reading even when raw water turbidities increase or decrease. Simply adjust the coagulant dosage to maintain this setpoint reading on the monitor. Chemtrac Systems, Inc. Page 34... -
Page 36: Manual Control Using Controller
This will cause the streaming current reading to go more positive, which will cause the pump to decrease coagulant. The result is continuous cycling above and below the setpoint, thus, the Chemtrac Systems, Inc. Page 35... - Page 37 In the above example, you would know that if the SCV went from 0 to –10 that the pump output would need to increase approximately 5% (since 10% produced a 20 unit change) and you would adjust the Chemtrac Systems, Inc. Page 36...
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Page 38: Automatic Control Setup
AUTO or Manual control mode can be done by pressing both p and q keys from the MAIN screen. When in AUTO control mode, the pump output percent will increase or decrease automatically in response to deviations from the setpoint. Chemtrac Systems, Inc. Page 37... -
Page 39: Flow Control
Flow Max: Maximum process flow in percent set for the produce the maximum pump control output for the parameter below (Pump Output Max). Pump Output Max: Pump control output for the maximum process flow set above (Flow Max). Chemtrac Systems, Inc. Page 38... -
Page 40: Tuning Constant Specifications
3.10 TUNING CONSTANT SPECIFICATIONS Tuning constants are stored digitally in non-volatile memory and can be changed by ® front panel keys. Table below shows default PID Parameters preset by Chemtrac PID Tuning Parameters Default Setting Proportional Band Integral Time PID Rate Experience has shown these values to be a good starting point for most applications. - Page 41 This page intentionally left blank Chemtrac Systems, Inc. Page 40...
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Page 42: General Guidelines
NOTES R Potassium Permanganate usually has no appreciable effect on the SCV (at normal dosages of 1-2ppm). R Increasing conductivity will drive the SCV toward zero. R Change in lag time may affect the SCV. Chemtrac Systems, Inc. Page 41... -
Page 43: Fundamental Streaming Current Knowledge
These Chemtrac Systems, Inc. Page 42... - Page 44 Finally, remove the old probe and piston and install the new set and pour in the raw water sample. Compare the readings of the new probe and piston to the old set. If the readings from the old probe are Chemtrac Systems, Inc. Page 43...
- Page 45 If you are unsure about your results, or cannot find another cause for whatever problems you are having with the monitor (e.g. lack of response, erratic reading), then contact the factory. Chemtrac Systems, Inc. Page 44...
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Page 46: Troubleshooting Guides
E. Opt switch inoperative. water sample and tighten F. Sensor output connections securely in place. incorrect. E. Replace opt switch. G. Circuit card component F. Check wiring. faulty. G. Replace circuit card. Chemtrac Systems, Inc. Page 45... - Page 47 This page intentionally left blank Chemtrac Systems, Inc. Page 46...
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Page 48: Maintenance Procedures
If monitor is being used for automatic dosage control, put the controller into MANUAL mode before starting replacement procedure. CLEANING PROCEDURES Depending on the type of contamination, see table below for different cleaning procedures recommended. Chemtrac Systems, Inc. Page 47... -
Page 49: Replacement Parts
Replacement Interval 1701 Delrin Piston 1 to 2 years 8601 Probe Cartridge 1 to 3 years 1301 110VAC Drive Motor 3 to 5 years 5017 Viton Diaphragm 3 to 5 years 8702 Probe Washer If Lost Chemtrac Systems, Inc. Page 48... -
Page 50: Dura-Trac Sensor Parts Identification
(5720) EXTENSION (5611) YOKE (5710) 3/4" BARB INLET PROBE BLOCK (5021) (5622) GUIDE (8711) PISTON (1701) PROBE WASHER (7703) PROBE (8601) DURA NUT (4200) O-RING (1605) DURA PLUG (8606) FIGURE 12. Dura-Trac Sensor Parts Identification Chemtrac Systems, Inc. Page 49... -
Page 51: Dura-Trac Ii Sensor Parts Identification
WW EXTENSION (5611) 3/4" BARB INLET (5021) WW PROBE BLOCK (5630) GUIDE (7720) PISTON (1710) PROBE WASHER (7703) PROBE (8601) DURA NUT (4200) O-RING (1605) DURA PLUG (8606) FIGURE 13. Dura-Trac II Sensor Parts Identification Chemtrac Systems, Inc. Page 50... -
Page 52: Ordering Information
ORDERING INFORMATION ® To place an order for spare parts you may either call, email, or fax Chemtrac directly or contact your local distributor or representative. The following information should be included in your request: Model number of your monitor, part number(s), qty, ®... - Page 53 This page intentionally left blank Chemtrac Systems, Inc. Page 52...
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Page 54: Mechanical Specifications
Current Monitor/Controller, Dura-Trac Sensor, Dura-Trac Sensor with Flush, Dura-Trac II Sensor, and Sensor Maintenance Module. 9.2" [234mm] 6.3" [161mm] 6.1" [155mm] 7.7" [196mm] SCC3500XRD Power Service Diag. Alarm CHEMTRAC SYSTEMS, INC. 7.71" [196mm] FIGURE 14. Streaming Current Monitor/Controller Dimensions Chemtrac Systems, Inc. Page 53... -
Page 55: Dura-Trac Sensor Dimensions
7.7" [196mm] CHEMTRAC SYSTEMS, INC. DURA-TRAC PATENTED MADE IN U.S.A. FIGURE 15. Dura-Trac Sensor Dimensions 11.2" [285mm] 6.3" [161mm] 9.7" [247mm] CHEMTRAC SYSTEMS, INC. DURA-TRAC PATENTED MADE IN U.S.A. FIGURE 16. Dura-Trac II Sensor Dimensions Chemtrac Systems, Inc. Page 54... -
Page 56: Dura-Trac Sensor With Flush Dimensions
9.2" [234mm] 5.3" [135mm] 7.7" [196mm] CHEMTRAC SYSTEMS, INC. DURA-TRAC PATENTED MADE IN U.S.A. FIGURE 17. Dura-Trac Sensor with Flush Dimensions Chemtrac Systems, Inc. Page 55... -
Page 57: Dura-Trac Ii Sensor Dimensions
11.2" [285mm] 9.7" [247mm] 6.3" [161mm] CHEMTRAC SYSTEMS, INC. DURA-TRAC PATENTED MADE IN U.S.A. FIGURE 18. Dura-Trac II Sensor with SMM Dimensions 11.2" [285mm] 6.3" [161mm] 9.7" [247mm] FIGURE 19. SMM Dimensions Chemtrac Systems, Inc. Page 56... - Page 58 -1000 to +1000 streaming current value. The two analog outputs are provided to allow the customer to monitor the SCV Signal and Offset value remotely. The explanation of the Offset mode and Offset value are described in Section 3.2.2 SCM2500XRD Setup Menu (1).
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