Page 1 W A L C H E M IWAKI America Inc. ® WebMaster ONE Controllers Master ® Water Treatment Controller Instruction Manual Five Boynton Road Hopping Brook Park Holliston, MA 01746 USA TEL: 508-429-1110 FAX: 508-429-7433 WEB: www.walchem.com...
Page 2 WALCHEM and for the purposes disclosed in writing a the time of purchase, if any. WALCHEM’s liability under this warranty shall be limited to replacement or repair, F.O.B. Holliston, MA U.S.A. of...
Page 3: Table Of Contents
TABLE OF CONTENTS INTRODUCTION ............................1 SPECIFICATIONS ............................1 ........................1 .. EASUREMENT ERFORMANCE ..............................2 .. LECTRICAL ..............................3 .. ECHANICAL ........................5 .. ARIABLES AND THEIR IMITS ...
Page 4 6.14 ........................ 81 ... ERIFICATION NPUT 6.15 ....................82 ... EVEL WITCHES IGITAL NPUT 6.16 ....................... 82 ... ENERIC IGITAL NPUTS 6.17 ..........................83 ... OUNTER NPUTS 6.18 ..........................84 ... IGITAL NPUTS 6.19 (1 – 8) O –...
Page 5: Introduction
INTRODUCTION The WebMasterONE series controller is multi-functional, but not all of the features mentioned are necessarily present in the controller you have received. All features can be added in the field. The controller may be configured to control a cooling tower, or a boiler, or both. Standard features include a direct sensor measurement of either conductivity, pH, or ORP;...
Page 6: Lectrical
Electrical Inputs 100 – 120/220-240 VAC ±10%, 12A, 50/60 Hz 1.6A, 5 x 20mm Input power Fuse Input signals State-Type Digital Inputs Electrical: Non-isolated 5 VDC with 301K ohm pull-up Typical response time: <10 seconds Devices supported: Any isolated dry contact (i.e. relay, reed switch) Types: Interlock, Level switch, Generic input Low Speed Counter-Type Electrical: Non-isolated 5 VDC with 301K ohm pull-up, 0-10 Hz, 50 msec minimum...
Page 7: Echanical
Mechanical Enclosure Material: Polycarbonate NEMA Rating: NEMA 4X Dimensions: 10” x 12” x 5-5/8” (25.4cm x 30.5cm x 14.5cm) Display: 64 x 128 Pixel Backlit LCD Graphics Module Operating Ambient Temp: 32-120°F (0 to 49°C) Storage Temp: -20 to 176°F (-29 to 80°C) Weight 11.5lb (5.2kg) Flow switch manifold...
Page 8 Chlorine, Chlorine Dioxide sensors Pressure: 0 to 1 atm (0 to 14.7 psi) Temperature Chlorine Dioxide sensors: 41 to 122°F (5 to 50°C) Chlorine: 41 to 113°F (5 to 45°C) Flow Cell Inlet: ¼” NPTF Flow Cell Outlet: ¾” NPTF Wetted Materials of Construction: PVC, Silicone or PTFE, Nylon, Isoplast, FKM High pressure tower contacting conductivity electrode...
Page 9: Variables And Their Limits
Variables and their Limits All menus shown may not be available. The menus that appear on your controller will vary with options installed and programmed. Sensor Input Menu – if pH Calibration Reminder 0-365 days Alarm Limits -2 to 16 Alarm Dead Band -2 to 16 Deviation from Primary Sensor...
Page 10 Sensor Input Menu – if Chlorine or Chlorine Dioxide Calibration Reminder 0-365 days Alarm Limits 0 to 10 mg/l Alarm Dead Band 0 to 10 mg/l Deviation from Primary Sensor 0.01 to 10 mg/l Damping 0 to 60 seconds Flowmeter Input Menu – Analog Input Type Flow Rate at 4 mA 0 to 1000 (units of measure defined by user) Flow Rate at 20 mA...
Page 11 Relay Output Menu – Time Proportional Set Point Full scale range of the input parameter Sample Period 1 to 1440 minutes Proportional Band Full scale range of the input parameter 0 = , 1 to 1440 minutes Output Time Limit Hand Time Limit 1 to 1440 minutes Relay Output Menu –...
Page 12 Relay Output Menu – Spike Set Point Full scale range of the parameter Dead Band Full scale range of the parameter Relay On-Time 1 sec to 1440 minutes Hand Time Limit 1 to 1440 minutes Relay Output Menu – Intermittent, Fixed Blowdown Time Set Point Full scale range of the parameter Interval Time...
Page 13 Relay Output Menu – Target PPM Feed with Feed Verification Makeup Conductivity Full scale range of the parameter Unit Volume to Trigger Output 1 to 999,999,999 (units defined by user) Target PPM Set Point 0 to 100,000 ppm Specific Gravity of Chemical Fed 0 to 10.000 g/ml 0 = , 1 to 1440 minutes Output Time Limit...
Page 14: Unpacking & Installation
UNPACKING & INSTALLATION Unpacking the Unit Inspect the contents of the carton. Please notify the carrier immediately if there are any signs of damage to the controller or its parts. Contact your distributor if any of the parts are missing. The carton should contain a WebMasterONE and technical support package (contains instruction manual, Quick Start Guide, CD and USB cable).
Page 15 The conductivity probe should be placed as close to the controller as possible, to a maximum distance of 250 ft. The cable MUST be shielded from background electrical noise. Use 24 AWG, 3 twisted pair, shielded, low capacitance (15 pF/ft) cable such as Walchem P/N 102535 (Belden 9680) or equivalent.
Page 16 3. Determine the Required Blowdown Rate in Pounds Per Hour Blowdown Rate = Steam Production / (Concentration Ratio –1) Example: 3450/(10-1) = 383.33 lbs./hr 4. Determine if Continuous or Intermittent Sampling is Required Use intermittent sampling when the boiler operation or loading is intermittent, or on boilers where the required blowdown rate is less than 25% of the smallest available flow control valve or less than the flow through the smallest orifice.
Page 17 If the sensor cables need to be extended, then 24 AWG shielded low capacitance (15 pF/ft) twisted pair cable such as Walchem P/N 102535 (Belden 9680) or equivalent should be used. Pay attention to the integrity of the cable shield. Always route sensor cables (or any other low voltage wiring) in conduit that is separated from any AC voltage wiring by at least 6 inches.
Page 18: Con Definitions
Icon Definitions Symbol Publication Description IEC 417, No.5019 Protective Conductor Terminal IEC 417, No. 5007 On (Supply) IEC 417, No. 5008 Off (Supply) ISO 3864, No. B.3.6 Caution, risk of electric shock Caution, High temperature, risk of Pending burn ISO 3864, No. B.3.1 Caution...
Page 19 Figure 1a: Typical Installation, Cooling Tower...
Page 20 Figure 1b Typical Installation, Boiler Intermittent Sampling...
Page 21 Figure 1c: Typical Installation, Boiler Continuous Sampling...
Page 22: Lectrical Installation
Electrical Installation The WebMasterONE series controllers require the following voltages: 100 –120/200-240 VAC± 10%, 50/60 Hz, 12 amperes maximum The controller must be connected to its own 15 ampere breaker, close by, to act as an alternate power shutdown. Your controller is supplied either factory prewired or ready to be hardwired. Depending upon your choice of options, you may be required to hardwire some or all of the input/output devices.
Page 23 Note: Many of the inputs and outputs listed are optional and may not be present in your controller. Prewired Option Hardwired Options Misc. Inputs/ Misc. Inputs/ Bottom View Bottom View Outputs Outputs Strain relief Strain relief Strain relief Strain relief Sensor Inputs installed with installed with...
Page 24 DIG INPUT 6 DIG INPUT 5 DIG INPUT 4 IN- IN+ +v IN- IN+ INPUT 5 INPUT 5 INPUT 6 INPUT 7 t+ IN- IN++5V -5V t+ IN- IN++5V -5V t+ IN- IN++5V -5V Figure 3 Identification of Parts...
Page 25 VoltageCode 0 or 4 1 or 6 POWERED POWERED POWERED POWERED POWERED POWERED POWERED 2 or 5 POWERED POWERED POWERED POWERED POWERED POWERED POWERED POWERED 3 or 7 POWERED POWERED POWERED POWERED DRY CONTACTS WILL BE LABELED COM INSTEAD OF NC. DETAIL “A”...
Page 26 DIGITAL INPUTS SEE DETAIL 'A' SENSOR 4 or 2 (Observe markings on circuit board) SEE DETAIL 'C' Sensor 1 Terminal Block ** Please note: Sensor 1 terminal block is oriented OPPOSITE of sensors 2-4. SENSOR 2 or 4 SENSOR 1** SENSOR 3 (Observe markings SEE DETAIL 'C'...
Page 27 (See 4-20mA Wiring Guide on the following pages) *Use shielded cable, grounded only at controller end, for ALL connections. Figure 6: Wiring Diagram for Optional Digital Inputs, 4-20 mA Inputs and 4-20 mA Outputs...
Page 28 +24V WebMaster 4-20 mA Input Wiring Guide GN +24 KEY: (-) minus terminal is the signal input. The 4-20mA signal goes here. (+) plus terminal is a +24VDC power supply for the transmitters. GND terminal is the return for completing circuits, both signal and power. +24 terminal at the top middle of the board is the same supply as the (+) plus terminal.
Page 29 ADDING AN ISOLATED RECEIVER TO THE LOOP (PLC, CHART RECORDER, ETC) The WebMaster GND must always be at the bottom of the loop. Maximum total loop resistance 1000 ohms. A. Two-Wire Loop-Powered Transmitter Input 1 - Notes: - PLC + -SIGNAL The (-) signal is the actual 4-20mA signal Input 1 +...
Page 30 Figure 7: Wiring Diagram for Optional Digital Communications...
Page 31: Function Overview
FUNCTION OVERVIEW Front Panel Figure 8: Front Panel Display Turn the power switch on. Be patient, the start up sequence will take about the same time as it takes a computer to boot up, approximately 2 minutes. At first the display backlight will blink and all output LEDS will light.
Page 32: Eypad
Keypad The keypad consists of 4 directional arrow keys (up, down, left and right), 4 menu/function keys (previous, next, exit and enter), and 4 quick access keys (home, calibrate, relays, and help). The arrow keys are used to change settings (up and down) and move the cursor to a different location within that menu in order to change that setting (left and right).
Page 33 Currently the WebMasterONE has only limited functionality for the local display and keypad. ALL of the programming must be accomplished using a computer. You will be able to calibrate all sensor inputs, change access codes, and enter the information necessary to communicate with the WebMasterONE via an Ethernet connection or via the modem over the Internet (if a modem card is installed in the controller).
Page 34: Ommunicating With The Web Master One
Communicating with the WebMasterONE 4.6.1 Connection via the USB Port Web Browser (Client) Hard coded Fixed IP Address: 199.199.199.2 A USB connection to the WebMasterONE can be made via a temporary cable between a laptop and the front panel of the controller. Equipment Required ...
Page 35 The ISP Password that the controller will use to connect to the ISP. Steps Required to Establish a Connection  Connect your PC to the Internet.  Enter the address htttp://w700.walchem.com/walchem/frontdoor.asp.  Click the link “Log onto WebMasterONE”, which will bring you to the WebMasterONE Connection Utility Authentication Page. ...
Page 36 4.6.3 Ethernet Connection to LAN Equipment Required  An Internet-ready computer.  A connection between the PC and the local area network (LAN).  An Ethernet connection between the WebMasterONE and the LAN. Utilities you need to set up on your computer ...
Page 37 4.6.4 Direct Modem Access: Direct Tap Web Browser Embedded (Client) Web Server modem TELCO modem Hard coded Fixed IP Address: 199.199.199.3 Equipment Required  An Internet-ready computer.  An active analog phone line, direct to the controller (without a PBX system in between) must be connected to the modem of the WebMasterONE.
Page 38 4.6.5 Direct Ethernet (for a WebMasterONE not connected to a LAN) Web Browser (Client) User Assigned Fixed IP Ethernet Cable Address User Fixed IP Address Assigned Gateway + Subnet Mask Equipment Required  An Internet-ready computer.  An Ethernet cable connection between the PC and WebMasterONE. ...
Page 39 4.6.6 Networking WebMasterONE Controllers via Ethernet Slaves Master Web Browser connected using any of the previous methods Equipment Required  An Internet-ready computer.  An Ethernet cable connection between each WebMasterONE using a hub or connection to LAN. Utilities you need to set up on your computer ...
Page 40: Tartup
Startup Once the controller has been set up for your application, start up is a simple process. Check your supply of chemicals, turn on the controller power, calibrate all sensors as necessary, supply the sensors with a flow of sample water, and it will start controlling. Shut Down To shut down the controller, simply turn off the power.
Page 41: Ndices
Indices The Indices menu displays the calculated values of the Ryznar’s Stability Index (RSI), Langliers Saturation Index (LSI), Use the Next key to scroll down the list, or Prev key to scroll up the list. Below the displayed values are menus to change the wet test data used to calculate the various Indices: Calcium Hardness, and Total Alkalinity.
Page 42 Conductivity Calibration – Standard Contacting Electrode “1 pt Process Cal – Calibrate” will be displayed. Press the Enter key to start the calibration. The reading from the system conductivity sensor will be displayed. Measure the conductivity of the system water using a hand held conductivity meter, and use the Arrow keys to enter the actual value.
Page 43 Temperature Calibration The current temperature reading will be displayed. Measure the actual temperature of the system water and use the Arrow keys to enter this value. Press the Enter key to highlight ‘CONTINUE’, then press Enter again to put the new value into memory. If the calibration factor is within +/- 15 degrees C (27 degrees F) the display will be “Cal Successful”, otherwise it will be “Cal Fail”.
Page 44 At the end of the calibration, the display will tell you if the calibration was successful or if the calibration failed. If successful, press the Enter key after the electrode has been replaced into the sample stream to resume control. If failed, refer to Section 8 for troubleshooting help. The calculated slope being more than 80% different from theoretical causes a calibration failure, or by the pH 7 mV offset being more than 60 mV.
Page 45 Step 4 will display the mV output of the electrode in the first buffer. When this reading is stable, press the Enter key to continue. Step 5 will prompt you to rinse the electrode and place it in the second buffer. Press the Enter key to continue.
Page 46 Chlorine or Chlorine Dioxide Calibration 1 pt Process Cal Ensure that the sensor is conditioned and equilibrated to the temperature of the sample. Ensure that the sample flow rate is between 30 and 100 liters/hour. Perform a test on the sample water for the oxidizer concentration. Enter the 1 point process calibration menu.
Page 47 Calibrate 1 Pt (if not in Fluorometer Mode) The 1-Point Calibration allows you to adjust the current reading of the process value to match what the actual value is as measured by some independent method (such as a laboratory measurement or handheld instrument). The software will maintain the “4 mA =” setting used to scale the input, and adjust the “20 mA =”...
Page 48: Et Points
Reset Cal Reset Cal is used to reset the 4 mA and 20 mA calibration coefficients to the factory defaults. Press the Enter key and the factory calibration will be restored. Relay Control (HOA) This menu will present you with a list of each relay. To the right of the name of the relay will be an indication of the current state of the relay (OFF, or ON).
Page 49 Relay 1- 8 Set Points The set points available for each relay will vary depending upon the control mode selected. A computer connection is required to change the control mode. The units of measure of some of the set points will vary depending upon sensor input that may be assigned to the relay. Set Point xxxxx (if control mode is any on/off set point, time proportional, target PPM) Use the arrow keys to change the process value at which you want the relay to activate.
Page 50 Prop Band (if control mode is intermittent sampling, proportional blowdown) Use the arrow keys to adjust the distance from the set point where the maximum output activation time will occur. This parameter will be in the units of measure of the sensor input used to control the relay.
Page 51 Output On Time Setup (if control mode is biocide timer or spike set point based feed) This menu is used to change the amount of time that the output will activate for each programmed event. Again, it is not possible to reschedule events using the keypad. Press Enter with Output On Time highlighted to access the screens that show each event: RLY1-8 TIMER ADDS Event...
Page 52: Ommunication
Communication This menu is used to enter the information required to communicate with the WebMasterONE using the modem option via the Internet, or using the Ethernet option. Once this information is entered, a remote PC may be used to configuring all or the set points that are unavailable with the keypad.
Page 53 Dial ISP (only if modem is installed) This menu is used to manually dial the WebMasterONE’s ISP. Press the Enter key when the cursor is on this to start the process. A new screen will appear. The first line will show the Dial up Status. This menu is informational only, and tells you what is happening with the dialup connection.
Page 54: Ccess Codes
Access Codes There are three levels of access code protection. If the Master password is used in the WebMasterONE, then any set point can be changed. If the Calibration Level password is used, then sensor calibrations will be allowed, but other changes will not. If the Read Only password is used the user will be able to look at any menu, but will not be allowed to make any changes.
Page 55: Feature Activations
5.12 Feature Activations This menu is used to activate all of the various communications software features in the field. If you have purchased the controller with the communication feature, it will already be activated and no further action will be necessary. Press Enter to view a list of any activated features. To activate a software feature in the field, purchase the activation key file from your distributor and save it on the root drive of a USB flash drive.
Page 56: Enu Selection Links
Menu Selection Links Along the left side of your PC monitor will be links to the various menu pages. The exact configuration of your WebMasterONE Series controller will determine which menus are available to you. Some menus only appear if an optional circuit board is installed. Others only appear if a certain option is selected in the Start Up menu.
Page 57 Controller Date Format Click on the radio button that corresponds to the desired date format. The choices are Month/Day/Year, Day/Month/Year or Year/Month/Day. Sensors 1-4 Use the pull-downs to select which type of sensor is connected to that input. If the input option cards are not installed for Sensors 2-4, then the pull-down will not be available.
Page 58 4-20 mA Inputs 1 - 8 This section will only appear if there is an analog input card installed in the controller. Use the pull-downs to select the function of the analog input channel. The functions available are described below. Make sure that you correctly match the programmed sensor type with the actual sensor type connected to that input! Not Used should be selected if nothing will be connected to the input channel.
Page 59 Flow based Feed should be selected if the relay will be triggered to activate for a programmable amount of time after a given volume of water has passed by the flow meter. In the relay menu, the volume to trigger feed, and the amount of time of the feed will be specified. Feed With Another Relay should be selected if you want to activate this relay at the same time as another relay (for example, inhibitor feed and bleed).
Page 60 Alarm should be selected if the relay is to be activated based on an alarm condition. Activate on a DI should be selected if the relay is to be activated whenever a digital input is in either an open or a closed state. Target PPM Feed should be selected if the relay is to be activated to feed a chemical to achieve a PPM set point.
Page 61: Ystem Summary Menu
The relay input assignment choices will be any digital or optional analog inputs that are defined as a flow meter input. If the relay control mode is any of the Biocide Timer Based Feed options: The relay input assignment is Not Applicable. If the relay control mode is Feed with Another Relay, Feed After Another Relay (%) or Feed After Another Relay (Fixed Time): The relay input assignment choices will be all the other relays.
Page 62: Ensor Menu - Conductivity Input
Sensor Menu - Conductivity Input Select the option or type in the values that you want for each of the sections on the page. When you click on the “Submit” button at the bottom of the page, your changes will take effect. If you move to another page without clicking “Submit”...
Page 63 Deviation from Primary Sensor This menu only appears if the Redundant Sensor Setting is Backup. Type the maximum allowable difference between the two sensor readings. If this deviation is exceeded, then control of any outputs using the sensor will stop and an alarm activated. Current Reading/Perform Calibration The current reading is a live reading of the calibrated conductivity of the sample.
Page 64 Uncalibrated Conductivity This section is for information only, and shows the conductivity reading without any calibration. This is helpful in troubleshooting the conductivity sensor. During a one-point calibration, the new value must be within  50% of this reading or else the calibration will be rejected. High-High Alarm Limit Type in the text box the sensor process value above which you a want a high-high alarm to occur.
Page 65: Ensor Menu - P H Input
Temperature Units Click on the radio button to select units of measure of either Fahrenheit or Celsius. Uncalibrated Temperature Displays the temperature reading before correcting with calibration constants. This is helpful for troubleshooting. This menu will not appear if no temperature sensor is detected at power-up. High Alarm In the text box, type the maximum temperature that you would reasonably expect to see for the sample.
Page 66 Primary Sensor Assignment This menu only appears if the Redundant Sensor Setting is Backup. Use the pulldown arrow to select the sensor to use as the primary control sensor. All sensors of the same type as the backup sensor will appear in the pulldown list. Deviation from Primary Sensor This menu only appears if the Redundant Sensor Setting is Backup.
Page 67 You then be prompted to “Please Rinse the Electrode”. Do so, and then click “Continue”. You will now be prompted to type in the value of the buffer being used. Do so, and then click “Continue”. You will now see the mV output from the electrode. When this value is stable, click “Continue”. The WebMasterONE will either pass or fail the calibration, and prompt you to return the electrode to the process.
Page 68 Calculated Offset This displays the mV output of the pH electrode in pH 7 as of the last calibration. A perfect electrode will generate 0 mV at pH 7. The offset information is also helpful for troubleshooting. % Difference from theoretical This displays the % difference of the slope from the theoretical value as of the last calibration.
Page 69: Ensor Menu - Orp Input
Click the Submit button. The new value will be displayed. Click the Close button to close the calibrate window. This menu will not appear if no temperature sensor is detected at power-up. Temperature Units Click on the radio button to select units of measure of either Fahrenheit or Celsius. Uncalibrated Temperature Displays the temperature reading before correcting with calibration constants.
Page 70 the sensor error alarm will activate. If both sensors are invalid, control stops and the sensor error alarms activate. To select this sensor as the backup sensor, click the Enable radio button, then click on the Submit button at the bottom of the page. The page will reload showing the status of the sensor as Backup, and offer additional menus: Primary Sensor Assignment This menu only appears if the Redundant Sensor Setting is Backup.
Page 71 You will now be prompted to type in the value of the standard solution being used. Do so, and then click “Continue”. You will now see the mV output from the electrode. When this value is stable, click “Continue”. The WebMasterONE will either pass or fail the calibration, and prompt you to return the electrode to the process.
Page 72: Ensor Menu - Chlorine , Chlorine Dioxide Inputs
Calculated Offset This displays the mV output of the ORP electrode at 0 mV as of the last calibration. The offset information is helpful for troubleshooting. High-High Alarm Limit Type in the text box the sensor process value above which you a want a high-high alarm to occur. High Alarm Limit Type in the text box the sensor process value above which you a want a high alarm to occur.
Page 73 the sensor error alarm will activate. If both sensors are invalid, control stops and the sensor error alarms activate. To select this sensor as the backup sensor, click the Enable radio button, then click on the Submit button at the bottom of the page. The page will reload showing the status of the sensor as Backup, and offer additional menus: Primary Sensor Assignment This menu only appears if the Redundant Sensor Setting is Backup.
Page 74 At the end of the calibration, the display will tell you if the calibration was successful or if the calibration failed. If successful, press the Enter key after the sensor has been replaced into the sample stream to resume control. If failed, refer to Section 8 for troubleshooting help. The WebMasterOne will either pass or fail the calibration.
Page 75 Low Alarm Limit Type in the text box the sensor process value below which you want a low alarm to occur. Low-Low Alarm Limit Type in the text box the sensor process value below which you want a low-low alarm to occur. Alarm Dead Band Type in the text box the dead band to be used for each alarm set point.
Page 76: M A) Input Menu
Low Alarm In the text box, type the minimum temperature that you would reasonably expect to see for the sample. This is helpful to detect a faulty or poorly calibrated temperature sensor. Click on the “Submit” button to save the changes. Level (4-20 mA) Input Menu (Only appears if a 4-20 mA input option card is installed, and a Level pull-down is selected in the 4-20 mA Input section of the Start Up page)
Page 77 Low Alarm Limit Type in the text box the process value below which you want a low alarm to occur. Low-Low Alarm Limit Type in the text box the process value below which you want a low-low alarm to occur. Alarm Dead Band Type in the text box the dead band to be used for each alarm set point.
Page 78: Low Meter (4-20 M A) Input Menu
Flow Meter (4-20 mA) Input Menu (Only appears if a 4-20 mA input option card is installed, and a Flow Meter pull-down is selected in the 4-20 mA Input section of the Start Up page) Backup Sensor Mode The redundant sensor algorithm will allow the user to define a primary sensor to use for control and a backup sensor.
Page 79: Generic (4-20 Ma) Input Menu
Dead Band The dead band prevents the flow total from accumulating when the flowmeter transmitter output is just slightly above 4 mA. For example, entering a dead band of 0.1 mA means that any transmitter signal below 4.1 mA will be recorded as a flow rate of 0. 20 mA = Type the flow rate at which the water meter will send a 20 mA signal into the text box.
Page 80 Present Value This displays the current reading of the device, using the mA signal from the device, the span of the 4-20 mA signal defined in “4 mA =” and “20 mA =” below, and the units of measure defined below.
Page 81: 4-20 Ma Input Menu
Fluorometer Mode The Fluorometer Mode should be selected if a Turner Fluorometer is being used. This will change the 1-Point Calibration to make it easy to adjust the ppm reading of the chemical product based on measurement of the fluorescent dye. To select this transmitter as fluorometer, click the Enable radio button, then click on the Submit button at the bottom of the page.
Page 82 Level should be selected if a continuous level transmitter is attached to that output. For point level devices, which do not use a 4-20 mA signal, wire into and program with the Digital Inputs section. Flow Meter should be selected if an analog flow transmitter is connected to that input. Generic should be selected if the 4-20 mA transmitter connected to that input is anything other than the previously mentioned ones.
Page 83: Flow Meter (Digital) Input Menu
Product Level Displays the live calculated process value, using the existing 4 mA = , 20 mA = and Dye/Product Ratio settings. New Value Enter the desired new reading for the ppb of fluorescent dye. Dye/Product Ratio The Dye-to-Product ratio is the ratio of the fluorescent dye in ppb to the active ingredient in the chemical product in ppm.
Page 84 Volume per Contact (appears only if the Contact type is selected) Type the volume of solution that needs to flow through the flow meter before the meter sends a contact into the text box. The controller uses this information to update the totalizer. K Factor (appears only if the Paddlewheel type is selected) Type the K factor (number of pulses per unit volume) of your flow meter into the text box.
Page 85: Interlock Menu
Primary Sensor Assignment (appears only if the Paddlewheel type is selected) This menu only appears if the Redundant Sensor Setting is Backup. Use the pulldown arrow to select the sensor to use as the primary control sensor. All sensors of the same type as the backup sensor will appear in the pulldown list.
Page 86: Level Switches (Digital) Input Menu
Vol. per Stroke Type in the text box the volume of chemical that the metering pump delivers each time it strokes the diaphragm. This information is used to totalize the volume of chemical delivered, by multiplying the volume per stroke by the number of strokes counted by the Feed Verification device.
Page 87: Ounter Inputs Menu
Custom Name You may give the input a custom name by typing it in the text box. Custom Message for Open Contact You may specify a custom message to be displayed in the System Summary when the digital input contact is open. Type it in the text box. Custom Message for Closed Contact You may specify a custom message to be displayed in the System Summary when the digital input contact is closed.
Page 88: Igital Inputs Menu
Total Alarm Limit You may specify a total number of counts accumulated above which an alarm message will occur. Type this in the text box. You must go to the Alarm page to specify that this alarm condition is a critical alarm in order to close the alarm relay or send an email or call a pager.
Page 89 Status This menu is for information only, and displays whether the output is “Off” or “On” and if on, for how much time, as well as any alarm conditions. Possible status messages are; Off, Off/Manual, On/Time counting up (if activated based on sensor input), Off/Time counting down or On/Time counting down/Hand (for manual relay activation).
Page 90 Hand Time Limit Type in the text box the maximum number of minutes that the relay can be activated in the Hand mode. Any value between 1 and 1440 is acceptable. Click on the “Submit” button to save the changes. Output Mode Click on the radio buttons to manually control the relay.
Page 91: Relay (1-8) Output Menus - Time Proportional Types
6.20 Relay (1-8) Output Menus – Time Proportional Types This page is used to select the set point, proportional band, etc. In time proportional control, the WebMasterONE will look at the process value and compare it to the set point value. If the set point is not satisfied, the controller will calculate an output on-time that will vary in proportion to the deviation from that set point.
Page 92 Sample Period Type in the text box the time span for the sample period. Refer to the example below under Proportional Band. Proportional Band Type in the text box the process value away from the set point at which the relay will be active for the entire sample period.
Page 93: Relay (1 - 8) Output Menus - Cycles Of Concentration Types
the Hand Time Limit (programmed in the next menu) expires or until the controller power is cycled. The Off mode is handy to prevent the relay from activating while you are changing set points. The Hand mode is handy to be able to test the pump or valve, wiring, etc. without needing to change set point.
Page 94 System Conductivity This is a display of the current cooling tower system water conductivity as measured by the assigned sensor. Makeup Conductivity This is a display of the current makeup water conductivity as measured by the assigned sensor Measured Cycles This is a display of the current ratio of system conductivity to makeup conductivity.
Page 95 It will take some experience to find out what the normal output on-time will be. If the relay cycles open and closed under worst case conditions in 30 minutes, you may want to set the Output Time Limit at 60 minutes. Output Mode Click on the radio buttons to manually control the relay.
Page 96: Relay (1 - 8) Output Menus - Intermittent (Fixed Blowdown Time) Types
6.22 Relay (1 – 8) Output Menus – Intermittent (Fixed Blowdown Time) Types This page is used for boiler control where the conductivity is checked at intervals, and if found to be above the set point, the relay is activated for a fixed time. The following sequence occurs while sampling: The relay activates to open the control valve, allowing a sample of the boiler water to flow past the electrode.
Page 97 Interval Time Type in the desired time between samples. Too short a time will waste water and drop the conductivity well below the set point. Too long a time will cause the conductivity to rise too high, potentially resulting in scale or carryover. Duration of Sample Type in the desired sample time.
Page 98: Relay (1 - 8) Output Menus - Intermittent (Proportional Blowdown Time ) Types
Type of Event Status to generate a ‘1’ in the log Status to generate a ‘0’ in the log Relay output Relay activated Relay not activated Interlock DI In the Interlock state as defined in In the non-Interlock state as defined in the Interlock page the Interlock page Level Switch DI...
Page 99 Current Reading This is a display of the current process value as measured by the assigned sensor. Status This displays the current status of the relay output, either “Off” or “On”, and if on, the amount of time it has been on. Possible status messages are Off, Off/Manual, On/Time counting down/Sampling, Off/Time counting down/Holding, On/Time counting down/Blowdown, Off/Time counting down/Waiting and On/Time counting down/Hand (for manual activation).
Page 100: Relay (1 - 8) Output Menus - Flow Based Feed Type
exclusive, meaning that if Relay 2 has Relay 4 interlocked, then R2 won’t turn on if R4 is already on, and R4 won’t turn on if R2 is already on. This feature should be used with caution since it can potentially delay a chemical addition for a long time.
Page 101 You may also change the Relay Control Mode here. If you do, you will have to reselect the Input Assignment as well. This section assumes that the Relay Control Mode is set to Flow Based Feed. Other control mode types are described in other sections of the manual. Relay Control Mode Click on the arrow of the pull down menu and select the way that you want to control the relay.
Page 102 Mutual Interlocks Click the check boxes to select or de-select the relays and analog output control outputs that you want to be prevented from turning ON if this output relay is already ON. If you do not need any other output to shut off when this relay turns on, UNCHECK all boxes. The selection is mutually exclusive, meaning that if Relay 2 has Relay 4 interlocked, then R2 won’t turn on if R4 is already on, and R4 won’t turn on if R2 is already on.
Page 103: Relay (1-8) Output Menus - Feed With Another Relay Types
Level Switch DI In the Low Alarm state as defined In the Normal state as defined in the in the Level Switches page Level Switches page Generic DI – In the Alarm state as defined in the In the Normal state as defined in the Alarm selected Generic Inputs page Generic Inputs page...
Page 104 intended to prevent the output from running out of control if the input fails in such a way that it will never deactivate the relay. Note that the relay will not activate again until someone resets the timer! It will take some experience to find out what the normal output on-time will be. If the relay cycles open and closed under worst case conditions in 30 minutes, you may want to set the Output Time Limit at 60 minutes.
Page 105: Relay (1 - 8) Output Menus - Feed After Another Relay (%) Types
Type of Event Status to generate a ‘1’ in the log Status to generate a ‘0’ in the log Relay output Relay activated Relay not activated Interlock DI In the Interlock state as defined in In the non-Interlock state as defined in the Interlock page the Interlock page Level Switch DI...
Page 106 Mutual Interlocks Click the check boxes to select or de-select the relays and analog output control outputs that you want to be prevented from turning ON if this output relay is already ON. If you do not need any other output to shut off when this relay turns on, UNCHECK all boxes. The selection is mutually exclusive, meaning that if Relay 2 has Relay 4 interlocked, then R2 won’t turn on if R4 is already on, and R4 won’t turn on if R2 is already on.
Page 107: Relay (1-8) Output Menus - Feed After Another Relay (Fixed Time)
Type of Event Status to generate a ‘1’ in the log Status to generate a ‘0’ in the log Relay output Relay activated Relay not activated Interlock DI In the Interlock state as defined in In the non-Interlock state as defined in the Interlock page the Interlock page Level Switch DI...
Page 108 Mutual Interlocks Click the check boxes to select or de-select the relays and analog output control outputs that you want to be prevented from turning ON if this output relay is already ON. If you do not need any other output to shut off when this relay turns on, UNCHECK all boxes. The selection is mutually exclusive, meaning that if Relay 2 has Relay 4 interlocked, then R2 won’t turn on if R4 is already on, and R4 won’t turn on if R2 is already on.
Page 109: Relay (1 - 8) Output Menus - Feed As % Of Time Types
Type of Event Status to generate a ‘1’ in the log Status to generate a ‘0’ in the log Relay output Relay activated Relay not activated Interlock DI In the Interlock state as defined in In the non-Interlock state as defined in the Interlock page the Interlock page Level Switch DI...
Page 110 Mutual Interlocks Click the check boxes to select or de-select the relays and analog output control outputs that you want to be prevented from turning ON if this output relay is already ON. If you do not need any other output to shut off when this relay turns on, UNCHECK all boxes. The selection is mutually exclusive, meaning that if Relay 2 has Relay 4 interlocked, then R2 won’t turn on if R4 is already on, and R4 won’t turn on if R2 is already on.
Page 111: Relay (1 - 8) Output Menus - Biocide Timer Based Types
Type of Event Status to generate a ‘1’ in the log Status to generate a ‘0’ in the log Relay output Relay activated Relay not activated Interlock DI In the Interlock state as defined in In the non-Interlock state as defined in the Interlock page the Interlock page Level Switch DI...
Page 112 Day of Week: Click on the check box next to the days of the week during which you want a relay activation to occur. If a box is checked and you don’t want an addition that day, click it to un- check the box.
Page 113 Prebleed Conductivity (only appears if Prebleed is Conductivity Based) Type the conductivity set point for the prebleed into the text box. This should be less than the normal bleed set point. Prebleed Time Limit (only appears if Prebleed is Conductivity Based) A time limit may be imposed on the conductivity based prebleed.
Page 114: Relay (1 - 8) Output Menus - Spike Set Point Types
Hand Time Limit Type in the text box the maximum number of minutes that the relay can be activated in the Hand mode. Any value between 1 and 1440 is acceptable Click on the “Submit” button to save the changes. Event Log Click on the link to view the event log.
Page 115 On/Time counting down/Hand (for manual activation). The only possible error messages are Interlock, Timeout and Sensor Error. See section 8.1 for a complete description of error messages. Custom Name This menu allows you to call the output another name if desired. Type the new name in the text box.
Page 116: Relay (1 - 8) Output Menus - Dispersant Types
It will take some experience to find out what the normal output on-time will be. If the relay cycles open and closed under worst case conditions in 30 minutes, you may want to set the Output Time Limit at 60 minutes. Output Mode Click on the radio buttons to manually control the relay.
Page 117 This section assumes that the Relay Control Mode is set to Dispersant. Other control mode types are described in other sections of the manual. Relay Control Mode Click on the arrow of the pull down menu and select the way that you want to control the relay. See Section 6.2 for details on each control mode.
Page 118 regardless of the set points by selecting Hand, or force the relay open regardless of the set points by selecting Off. If you select Off, the relay will not activate again until either Hand or Auto is selected (or if power is cycled)! If you select Hand, the relay will activate until either Auto or Off is selected, or until the Hand Time Limit (programmed in the next menu) expires or until the controller power is cycled.
Page 119: Relay (1-8) Output Menus - Bleed Volume Based On Makeup Volume
6.32 Relay (1-8) Output Menus - Bleed Volume based on Makeup Volume This page is used to activate the relay until a programmed volume of water flows through the bleed water meter(s). The relay activation is triggered by a programmed volume of makeup water flowing through the makeup water meter(s) You may also change the Relay Control Mode here.
Page 120 Mutual Interlocks Click the check boxes to select or de-select the relays and analog output control outputs that you want to be prevented from turning ON if this output relay is already ON. If you do not need any other output to shut off when this relay turns on, UNCHECK all boxes. The selection is mutually exclusive, meaning that if Relay 2 has Relay 4 interlocked, then R2 won’t turn on if R4 is already on, and R4 won’t turn on if R2 is already on.
Page 121: Relay (1- 8) Output Menu - Alarm Type
Type of Event Status to generate a ‘1’ in the log Status to generate a ‘0’ in the log Relay output Relay activated Relay not activated Interlock DI In the Interlock state as defined in In the non-Interlock state as defined in the Interlock page the Interlock page Level Switch DI...
Page 122 If this Relay is a Dry Contact Use this section if the relay board installed in this controller has a dry contact relay in the position of the relay being programmed as an alarm. If you look at the relay board, find the relay number you are programming as the alarm, and if it has terminals labeled NC and COM, it is dry contact.
Page 123: Relay (1-8) Output Menus - Activate On Adi
Hand Time Limit Type in the text box the maximum number of minutes that the alarm output can be activated in the Hand mode. Click on the “Submit” button to save the changes. Event Log Click on the link to view the event log. The event log contains the date and time of each relay activation and deactivation, as well as the state of each Interlock, Level Switch, or Generic digital input.
Page 124 Custom Name This menu allows you to call the output another name if desired. Type the new name in the text box. Digital Input Status This menu shows the Open/Closed status of the digital input assigned to the relay. Activate Relay when Switch is: Click on the radio button to select whether to activate the relay when the assigned digital input is either open or closed.
Page 125: Relay (1 - 8) Output Menus - Target Ppm Feed Type
If you select Off, the relay will not activate again until either Hand or Auto is selected (or if power is cycled)! If you select Hand, the relay will activate until either Auto or Off is selected, or until the Hand Time Limit (programmed in the next menu) expires or until the controller power is cycled.
Page 126 Relay Control Mode Click on the arrow of the pull down menu and select the way that you want to control the relay. See Section 6.2 for details on each control mode. System Conductivity Input Assignment Click on the arrow of the pull down menu and select the conductivity input that will be used to control the relay.
Page 127 Unit Volume to Trigger Output Type in the text box the volume of solution that needs to enter the system in order to trigger the feed. Specific Gravity of Chemical Fed Type in the text box the specific gravity of the product being fed. Pump Flow Rate Type in the text box the flow rate of the pump used to feed the product.
Page 128: Relay (1 - 8) Output Menus - Target Ppm Feed With Feed Verification Type
If you select Off, the relay will not activate again until either Hand or Auto is selected (or if power is cycled)! If you select Hand, the relay will activate until either Auto or Off is selected, or until the Hand Time Limit (programmed in the next menu) expires or until the controller power is cycled.
Page 129 Makeup Conductivity Input Assignment Click on the arrow of the pull down menu and select the conductivity input that will be used to control the relay. If Not Used is submitted, a field will appear for entering the makeup conductivity manually. Assign Makeup Meter (1-3) Click on the arrow of the pull down menu and select the flowmeter inputs that will be used to control the relay.
Page 130 Reset Timeout (only appears if the Output Time Limit below has been exceeded) There is a button called “Reset Timeout” which is used to reset the output if it has been activated for longer than the time limit imposed in the “Output Time Limit” menu described below. Mutual Interlocks Click the check boxes to select or de-select the relays and analog output control outputs that you want to be prevented from turning ON if this output relay is already ON.
Page 131: Analog Output (1-4) Menu - Retransmit Mode
Type of Event Status to generate a ‘1’ in the log Status to generate a ‘0’ in the log Relay output Relay activated Relay not activated Interlock DI In the Interlock state as defined in In the non-Interlock state as defined in the Interlock page the Interlock page Level Switch DI...
Page 132: Analog Output Menus (1-4) - Proportional Feed Mode
4 mA Value Type in the text box the input value that you want to correspond to a 4 mA output by the option card. 20 mA Value Type in the text box the input value that you want to correspond to a 20 mA output by the option card.
Page 133 Maximum Output Allowed Type in the text box the highest % output allowed for the analog output. Generally this will be 100%. Input Value when Output is Max Type in the test box the analog or sensor input value where the output needs to be at its maximum allowed value.
Page 134 Output Time Limit Type in the text box the maximum amount of time that the output can be continuously activated before the controller deactivates the output (0% or 4 mA) and activates an Output Time Limit alarm. This is intended to prevent the output from running out of control if the input fails in such a way that it will never deactivate the output.
Page 135: Larming
6.39 Remote Alarming Alarm Condition/Critical Alarm In the left hand column, a list of all possible alarm conditions will be displayed. Only the alarm conditions that are possible given how your controller is configured will appear. To the right of each type of alarm condition there will be a column labeled Critical Alarm with a choice of “Yes”...
Page 136: Lsi/Rsi
A window will open to ask if you would like to open the file or save it to disc. Select the method you would like to use. The file is a basic text file with a .log extension that may be opened in any word processing program (Word, Notepad, etc.).
Page 137: Vtouch Config
Assign pH Input Click on the arrow of the pull down menu to select the sensor input that is used for the pH. If there is no pH sensor installed, and it is necessary to manually enter the pH, select Not Used. The pH reading from the selected sensor is displayed here.
Page 138: System Status Auto-Reporting
6.42 System Status Auto-Reporting The system status auto report is an email in html format that is a snapshot of current conditions, identical to what is displayed on the System Summary web page. System Status Reporting Click the appropriate radio button to select whether the report should be sent by email (Enable) or not (Disable).
Page 139: Datalog Auto Report
6.43 Datalog Auto Report The other type of automatic report is a data log report. This report will email a data log file of any parameters selected. This file may be opened in a spreadsheet for graphing or other data manipulation.
Page 140 Logging Interval Type in the text box the time required between data points. If this is set to a particular value, and changes to the logging parameters results in a larger minimum interval, the time previously set will be replaced by the new minimum interval. Datalogging Mode If data needs to be logged at all times, select Normal.
Page 141: Manual Datalog
6.44 Manual Datalog You may either download data files automatically, or manually. To have the data automatically sent to you via email, set up the data log in the Auto Reporting page (See Section 6.43). The Manual and Auto Reporting data logs are dynamically connected to each other. For each data log, select the parameters to log, and the maximum time frame of the data log and submit the changes.
Page 142 If datalogging of some parameters needs to be suspended during an Interlock condition, or when a generic digital input is in a certain state, or when a relay is on or off (as in during a Probe Wash cycle, for example) or during an alarm condition, select Suppressed by Events. The data will be suppressed for as long as the trigger is active.
Page 143 Scenario 1: Maximum Log Duration Datalog 1 Maximum Log Datalog 2  DataLog 1 downloaded by user  If downloaded successfully by Flashstick or Web Page, DataLog 1 is deleted from the controller.  DataLog 2 starts  Maximum Log Duration RESETs Scenario 2: Maximum Log Duration Maximum Log Duration...
Page 144: Graphing/Trending
Log files that are actively filling will be erased (after a warning pop-up) if the user changes critical parameters such as:  The parameter being logged  The alarm used to trigger the log  The logging duration  The logging interval Or for the related inputs used for alarm triggered logging ...
Page 145 Primary ISP Phone No. Type in the text box the access phone number for the controller’s Internet Service Provider. APN (only appears with GPRS activations) Type in the text box the APN (Access Point Name) provided by the cell service provider. Controller Phone No When you need to communicate with the controller, you go to the web site, link to the WebMasterOne access page, and a call is made from our server to the controller to wake it up.
Page 146 Cell Phone Text Message Addresses The email message above is in html format and will not be displayed correctly on a cell phone. The cell phone text message email will be truncated. Data log and summary reports are not sent to these addresses, only alarm emails.
Page 147 Connection Status This menu is informational only, and tells you what is happening with the Internet connection. Possible status messages vary with the type of connection and include: Message Explanation  Off Line The controller is not connected.  Dialing xxx-xxxx The controller is dialing out to the ISP.
Page 148 Last Known Signal Strength This field will display the actual modem response string from the wireless modem. An rssi signal of 12-36 is good, the higher the number the better. If it’s 12 then the signal is very marginal and you should attempt to improve it.
Page 149: Advanced Comms
6.47 Advanced Comms Internet Dialup (only appears if PSTN modem is installed) Wait for dial tone before dialing Click to place a check in the box if you want the modem to wait for a dial tone before calling out. In some countries the dial tone may not be recognized.
Page 150: Configuration File Menu
Gateway Port (only for VNet Activations) Type the desired VNet port in the text box. This will normally not change from the default port of 1194. Sub-Network Settings (only appears if the controller has master networking activated) Mapped Internet IP Address If you are accessing the master process monitor by using NAT to translate a real IP address to a fake IP address, then type the real IP address into this field of the master process monitor.
Page 151: Notepad
Import UCF Once the file name is displayed in the Browse text box, click the Import UCF button to transfer the file to the WebMasterONE. 6.49 Notepad The configuration Notepad gives you a place to make notes regarding any changes that you have made to the set points, to document calibrations, system upsets or anything else that you want to note.
Page 152: Sub-Network
Note: Control is suspended during a software upgrade. If the controller being updated is a slave on a network of WebMasterONEs, both the master controller and the slave being updated will have control suspended during the upgrade process. Depending upon the extent of the changes and Internet traffic, the upgrade can take anywhere from 15 minutes to 2 hours to complete.
Page 153: Maintenance
MAINTENANCE The WebMasterONE controller requires very little routine maintenance. The electronic enclosure only needs to be wiped down with a damp cloth to keep it clean. All other maintenance involves cleaning and calibrating sensors, described in detail below. The WebMasterONE inner hinged face panel is secured with Phillips (#1) screws, CAUTION! which require a tool to open.
Page 154 (P/N 102586) SWITCH HOUSING ASSEMBLY (P/N 190998) FLOAT ASSEMBLY (P/N 190996) RETAINING O-RING (ASSEMBLED ONTO SWITCH HOUSING AFTER FLOAT ASSY) (P/N 102919) O-RING (P/N 102594) FLOW SWITCH BODY (P/N 102881) Figure 10 Flow Switch Assembly...
Page 155: Onductivity Sensor Cleaning And Calibration
Conductivity Sensor Cleaning and Calibration Contacting Conductivity The frequency of cleaning for the contacting conductivity electrode varies with each installation. The best way to determine the frequency is to compare the reading of the controller to the reading of a calibrated hand held instrument. When the two readings differ by an amount that you deem to be excessive (perhaps 5%), then it time to clean and recalibrate the electrode.
Page 156: H Electrode Cleaning And Calibration
For loose coatings, wipe with a cloth. Use a bottle brush to clean out the internal channels. For removal of scale, dip in a dilute hydrochloric or gallic acid solution, and rinse. The electrodeless sensor is immune to oily coatings. Reassemble all parts.
Page 157: Isinfection Sensor Cleaning And Calibration
Disinfection Sensor Cleaning and Calibration The frequency of cleaning for the disinfection sensors varies with each installation. The best way to determine the frequency is to verify that the desired oxidizer concentration closely matches an offline analysis (such as a DPD test). When the two readings differ by an amount that you deem to be excessive then it time to clean and recalibrate the sensor.
Page 158: Troubleshooting
TROUBLESHOOTING ERROR MESSAGES Conductivity Calibration Failure This error message occurs after calibration of the conductivity sensor. A clean sensor should give a predictable signal in a solution of known conductivity. If the calibration adjusts the signal more than 50% away from the predicted value, the calibration will fail. A signal this far off indicates a problem with the reading, and is not normal.
Page 159 pH Calibration Failure This error message occurs after attempting an electrode calibration. The normal slope of a pH electrode is 59 mV/pH unit. As the electrode ages, this slope will decrease. The WebMasterONE reports the % difference from the theoretical slope after each calibration. When the slope reaches 12 mV/pH unit (80% difference), the calibration fails.
Page 160 Disinfection Sensor Calibration Failure This error message occurs after calibrating the chlorine or chlorine dioxide electrode. The controller will display a calibration failure if the offset calculated in the Zero Calibration is outside of the range –20 to 40 mV or the slope calculated in the One Point Process Calibration is outside of the range -10 to -100 mV per ppm.
Page 161 Output Time Out This error message indicates that the relay output has been activated for an amount of time that exceeds the user-programmed maximum allowable time. The output relay will be forced off until the “Reset Timeout” button found in that Relay Output Page is clicked. Possible Causes Corrective Actions Maximum time is set too low for...
Page 162 Conductivity High Alarm This error message indicates the conductivity reading exceeds the user-programmed maximum allowable value. Possible Causes Corrective Actions Programmed value is too close to Go to the Conductivity Input Page and make conductivity set point. sure that the high alarm limit is set at least 5% above the set point.
Page 163 pH High Alarm This error message indicates the pH reading exceeds the user-programmed maximum allowable value. Possible Causes Corrective Actions The programmed value is too close to Go to the pH Input Page and make sure that the pH set point. the High Alarm Limit is set at least 0.5 pH units above the set point.
Page 164 pH Low Alarm This error message indicates the pH reading is below the user-programmed minimum allowable value. Possible Causes Corrective Actions The programmed value is too close to Go to the pH input page and make sure that the pH set point. the Low Alarm Limit is set for at least 0.5 pH units below the set point minus the dead band.
Page 165 ORP High Alarm This error message indicates the ORP reading exceeds the user-programmed maximum allowable value. Possible Causes Corrective Actions The programmed value is too close to the Go to the ORP Input Page and make sure ORP set point. that the High Alarm Limit is more than 50 mV above the set point plus the dead band.
Page 166 ORP Low Alarm This error message indicates the ORP reading is below the user-programmed maximum allowable value. Possible Causes Corrective Actions The programmed value is too close to the Go to the ORP Input Page and make sure ORP set point. that the Low Alarm Limit is at least 50 mV below the set point.
Page 167 Drum Level Low Alarm (one for each used) This error message appears if either a level switch or level transmitter is putting out a signal that indicates a low level of solution. This could mean that the level switch is either open or closed, or that the level transmitter is indicating a volume below the user-programmed low alarm limit.
Page 168 Pump Failure (one for each monitored) This error message appears if contact closures from the Feed Verification flow monitor are expected but are not detected by the digital input option circuit board. Possible Causes Corrective Actions Metering pump has lost prime. Re-prime metering pump.
Page 169 4-20 mA Input Low Alarm This error message is caused by the 4-20 mA signal being lower than the user-programmed value for the low alarm limit. Possible Causes Corrective Actions The process value being measured by the Determine the reason for the out of spec transmitter is out of specifications.
Page 170 pH Sensor Error This error message is caused by the signal from the pH electrode being outside of the normal range (pH less than –2 or greater than 16, or input voltage outside –1.45 VDC to +1.45 VDC). Any relay being controlled by the sensor will be forced off.
Page 171 Temperature Sensor Error This error message is caused by the temperature signal being outside the normal range (around 1500-33,000 ohms for contacting conductivity sensors, 15,000 to 330,000 for electrodeless conductivity sensors, 1000 to 1400 ohms for pH sensors and high temperature conductivity sensors).
Page 172 Rate High Alarm The rate for a flow meter input or counter input has exceeded its programmed maximum limit. Possible Causes Corrective Actions The system has experienced too high a rate Evaluate system The rate high alarm point is too low Go to the input page and reset the limit You are getting false contacts.
Page 173 Sensor Board Failure This error message is caused by a failure of the controller to recognize that the option circuit board is connected. The ORP output relay will be forced off. Possible Causes Corrective Actions Poor connection of the option board to Remove the option board and inspect both the sensor interface board.
Page 174 Ethernet Card Failure This error message is caused by a failure of the controller to recognize that the option circuit board is connected. Possible Causes Corrective Actions Poor connection of the option board to Remove the option board and inspect both the core board.
Page 175: Problems That Don't Generate An Error Message
Temperature Low Alarm This error message is caused by the temperature signal from a sensor being below the user- programmed value for the low alarm limit. Possible Causes Corrective Actions The actual temperature is too low. Correct problem with process. The programmed value is set too close to Go to the sensor input page and.
Page 176 Temperature calibration, high/low alarm menus missing from Sensor Input page The controller not detecting the temperature sensor at power up causes this problem. Possible Causes Corrective Actions The temperature sensor is not connected. Connect the temperature sensor and turn power on. Faulty temperature sensor.
Page 177: Connection Problems
Link to Analog Inputs page does not appear The controller not detecting an analog input board at power up causes this problem. Possible Causes Corrective Actions No analog input board is installed Install the analog input option board and turn power on. Poor connection of the option board Remove the option board and inspect both mating connectors for corrosion or damage...
Page 178: Service Policy
Pages load slowly The time required for pages to load depend upon the amount of information contained in the page, the processing speed of your computer, the amount of RAM available in your computer, and the method of connecting (Ethernet, Internet, or USB connection). We recommend a minimum processor speed of 100 MHz, and minimum RAM of 40 MB.

Walchem WebMaster ONE Instruction Manual

Introduction

Specifications

Unpacking & Installation

Function Overview

Operation - Using Local Display and Keypad

Operation - Using Pc

Maintenance

Troubleshooting

Service Policy

Quick Links

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