Hach 6120118 manual

Catalog Number 6120118 Digital PC sc and RC sc ¾-inch Combination pH/ORP Sensor USER MANU AL October 2005, Edition 4 ©Hach Compan y , 2004–2005. All rights reserved. Printed in the U .S .A. eac/dp[...]

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3 T able of Contents Section 1 Specific at io n s ................ ................ ................ ................. ................ ................ ................ .............. .......... 5 Section 2 General I nformation ................ ................ ................ ................ ................ ................. ................ .[...]

4 T able of Contents 7.3 T roubleshootin g the pH or O RP Sensor ..... ................ ................ ................ ................ ................. . ........... .......... 35 Section 8 Replaceme nt Parts and Accessories ..... ................ ................ ................ ................ ................ ............. 37 8.1 Replacem[...]

5 Section 1 Specifications Specifications are subj ect to change without notice . T able 1 Combination pH and ORP Sensor Specifications Components Corros ion-resistant mater ials, fully-immers ib le probe with 4.6 m (15 ft) cable Measuring Rang e (pH) 0 to 14 pH Measuring Rang e (ORP) –2000 to +2000 mV Measuring Ra nge (T emperature) 0 to 105 °C[...]

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7 Section 2 General Inf ormation 2.1 Safety Inf ormation Please read this entire man ual bef ore unpac king, setting up , or operatin g this equipment. P a y attentio n to all danger an d caution state ments . F ailure to do so could result in serious injury to the operator or dama ge to the equipment. T o ensure that the prot ect ion provided b y [...]

8 General Information 2.2 General Sensor Inf ormation Optional equipment , such as mounting hardw are f or the probe , is supplied with instructions for all user insta llati on tasks . Se v er al mountin g options ar e a v ailable, allo wing the probe to be ada pted for use in many diff erent applications . 2.2.1 Sensor Body Styles Combination pH a[...]

9 General Inf ormation Figure 3 Insertion Style Sensor with Domed Electr ode Figure 4 Sanitary- style Sensor 2.3 The Digital Gatewa y The digital ga tew ay was de v eloped to pro vide a means to us e e xisting analog sensors wit h the ne w digital controller s. Th e gate wa y cont ains all the nece ssary software and hardw are to interf ace with th[...]

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11 Section 3 Installation DA N G E R Only qualifie d personnel should conduct the task s described in this section of the manual. DA N G E R Seul un technicien qualif ié peut effectuer les tâches d'inst allation décrite s dans cette sectio n du manuel. The Combination pH/O RP Sensor can be used with either an sc100 or sc1000 co ntroller . R[...]

12 Installation Figure 5 Pr oper Wire Preparation a nd Inser tion Figure 6 Wiring and Assembli ng the Digital Gatewa y 1. Strip ¼-inch of insulation. 2. Seat insulation against connector with no bare wire exposed. 1. Digital gatew ay front 7. Cord grip 2. O-ring 8. F rom sensor 3. Sensor wire conne ctor 9. Inser t wires into connector according to[...]

13 Installation 3.2 Connecting/Wiring the Digita l Gate way to the sc100 Contr oller DA N G E R The sc100 and certain ver sions of the sensor are sui table for us e in Class 1, Division 2, Gr oups A, B, C, D Hazar dous Locations . See Contro l Drawing 58600-78 in the sc100 Contr oller Man ual, Cat. No. 58600-18 f or acceptable se nsor versions and [...]

14 Installation Figure 7 Attaching the Digita l Gatewa y using t he Quick-con nect Fittings 3.2.1.2 Hard-wiring the Digi tal Gatewa y to the sc100 Important Note: Hard-wir ing the digit al gatewa y t o the sc100 is not an appr ov ed method f or Class 1, Division 2 Hazardous Locations. 1. Disconnect po wer to the cont roller if pow ered. 2. Open the[...]

15 Installation Figure 8 Hard- wiring the Digital Gatewa y 3.2.2 Connecting the Di gital Gate way to a sc100 Cont r oller in a Hazardous Location DA N G E R The sc100 and certain ver sions of the sensor are sui table for us e in Class 1, Division 2, Gr oups A, B, C, D Hazar dous Locations . See Contro l Drawing 58600-78 in the sc100 Contr oller Man[...]

16 Installation 3.2.2.1 Attaching the Di gital Gateway with a Quick-Connect Fitting in a Hazar dous Location The digital gate wa y is supplied with a k ey ed quick -connect fitting f or easy attach ment to the controller , see Figure 7 on page 14 . F or Hazardous Locations , a connect or saf ety loc k (Cat. No. 6139900) must be installe d. Retain t[...]

17 Installation 3.4 Mounting the Digital Gatewa y The digital gate wa y is supplied with a mounting clip f or mounting to a wall or other fl at surf ace. See Figure 10 f or dimensions. Use an appr opriate fastener to secure it to the wall, see Figure 11 . After t he sensor is wired to the digital gate wa y and the two ha lv es are threaded toget he[...]

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19 Section 4 User Interface and Na vigation 4.1 Using the sc100 Contr oller The front of the con troller is shown in Figure 12 . The ke ypad consists of the eight k eys descr i be d in Table 5 . Figure 12 Front of the Controller 1. Instrument displa y 5. IrD A window 2. BACK key 6. HOME key 3. MENU key 7. ENTER key 4. RIGHT , LEFT , UP , and DOWN k[...]

20 User Interface and Navigation 4.1.1 Contr oller Display Features When a se nsor is conn ected and the controller is in measurem ent mode, the controlle r automatically identif ies th e connected sensors and displa ys associated measurements. The displa y will flash on startup, whe n a sen sor er ror h as occur red, an d wh en a sensor is being c[...]

21 User Interface and Navigation 4.2 Using the sc1000 Contr oller The sc1000 is a touch screen applicat ion. Use your finger to touch ke ys and menu commands . In nor mal operation the touch screen displa ys the measured v alues for the sensors selected. 4.2.1 Displa y Features 4.2.1.1 Using the P op-up T oolbar The pop-up toolbar provides access t[...]

22 User Interface and Navigation Figure 15 Main Menu 4.2.1.3 Navigating th e Menu Windows T o view a me nu item, touc h the menu ite m or use the UP and DO WN keys to highlight the item. The menu item remains highlighted f or ap proximately 4 secon ds af ter it is selected. T o view the h ighlighted command , select th e area to th e left of th e m[...]

23 User Interface and Navigation Figure 16 Changing a Menu Item Figure 17 K eypad 1. Displa y Area 5. HOME –changes to the display of measured v alues. 2. BACK 6. UP –scrolls up 3. FOR W ARD 7. DOWN –scrolls down 4. ENTER –confir m s th e entr y or se lection. 1. Enters numbers or the character as shown on the button. 2. Mov es the cursor o[...]

24 User Interface and Navigation Figure 18 List Bo x Figure 19 Message window 1. Scrolls up or down 2. CANCEL –cancels a nd entry . 3. ENTER –confirms a sel ection. 1. Scrolls up or down. 2. Displays the messages or w ar nings. 3. Displays details on the selected entr y . 4. This button changes bac k to the previous displa y . 5. ENTER –confi[...]

25 Section 5 Operation 5.1 Sensor Setup When a sensor is initially installed, the ser ial number of the Digital Gatewa y will be displa yed as the sensor name. T o change the sensor name r ef er to the f ollowing instru ctions: 1. Select Main Menu. 2. F rom the Main Menu, select SENSOR SETUP and confirm. 3. Highlight the appropriate se nsor if more[...]

26 Operation CONFIGURE (continued) REJECT FREQ Choose 50 or 60 Hz depending on the power line fre quency f or optimal noise rejection. Default is 60 Hz. FIL TER Select 0–60 second signal averaging time. TEMP ELEMENT Select type of temperatur e element from the displayed choices . SELECT BUFFER Select the buff er type (standard 4, 7, 10 or DIN 1 9[...]

27 Operation 5.5 ORP Sensor Setup Men u SELECT SENSOR (if more than one sensor is attached) CALIBRA TE (Main Menu Item) 1 POINT MANUAL Cal ibration against a single known sample. TEMP ADJUST Adjust the display ed temperature by up to ± 15 °C . DEF A U L T SETUP Restores the system to the original fa ctor y calibration. CONFIGURE EDIT NAME Enter u[...]

28 Operation 5.6 pH Calibration The manuf acturer off ers one and two point autom atic and manual calibrat ions f or pH. An automatic calibr ation identifies the b uff er table corr espo nding to the chosen bu ffer and automatically calibrates the probe after it stabilizes . A manual calibration is perf or med by placing the pH sensor in an y buff [...]

29 Operation 5.6.3 One P oint Manual Calibration 1. F rom the Main Menu, select SENSOR SETUP and confirm. 2. Select the appropriate sensor if more than one is attached and confirm. 3. Select CALIBRA TE and confirm. 4. Select 1 POINT MANU AL. Select the av ailabl e Output Mode (Active , Hold, or T ransfer) from the list bo x and confir m. 5. Mov e t[...]

30 Operation 5.7 ORP Calibration 5.7.1 One-point Man ual Calibration The manufacturer off ers a one po in t ma nual calibration for ORP . The v alue of the sample used in the manual calibr ation may be d eter mined by labor ator y analysis or comparison reading. 1. F rom the M ain Menu, select SEN SOR SETUP and confir m. 2. Select the appropriate s[...]

31 Operation 5.9 Adjusting the T emperature View or ch ange the temperature using t he steps below: 1. F rom the Main Menu, select SENSOR SETUP and confirm. 2. Select the appropriate sensor if more than one is attached and confirm. 3. Select CALIBRA TE and confirm. 4. Select TEMP ADJUST and confir m. 5. Select MEASURED TEMP and confir m. 6. The tem[...]

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33 Section 6 Maintenance DA N G E R Only qualifie d personnel should conduct the task s described in this section of the manual. DA N G E R Seul un technicien qualif ié peut effectuer les tâches d'inst allation décrite s dans cette sectio n du manuel. DA N G E R Explosion hazar d. Do not connect or disconne ct equipment unle ss po we r has [...]

34 Maintenance 6.2 Cleaning the Sensor CA UTION Bef ore cleaning with acid, determine if the c hemical reacti on between the aci d and the sample will c r eate a hazard ous chemical reacti on . (For example, do not pu t a sensor that is used i n a cy anide bath directl y into a stron g acid for c leaning because this chemic al combination may pr od[...]

35 Section 7 T roub leshooting 7.1 Err or Codes When a sensor is e xper iencing an error condition, the sensor reading on the measurement screen will flash and all rela ys and anal og outputs associated with this sensor will be held. The follo wing conditions will cause the sensor reading to flash: • Sensor calibration • Rela y timer washing cy[...]

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37 Section 8 Replacement P ar ts and Accessories 8.1 Replacement Items, Accessori es, and Reagent and Stan dar ds Item Description QTY Catalog Number Instruction manual, Combination pH System, English each 6120118 Cable , sensor extension, 1 m (3 ft) each 6122400 Cable , sensor extension, 7.7 m (25 ft) each 5796000 Cable , sensor extension, 15 m (5[...]

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39 Section 9 Ho w to Order U .S.A. Customers By T elephone: 6:30 a.m. to 5:00 p.m . MST Monday throu gh Friday (800) 227-HACH (80 0-227-4224) By Fax: (970) 669-2932 By Mail: Hach Company P.O. Box 389 Loveland, Colorado 80539-0389 U.S.A. Ordering inf ormation by e-mail: orders@hach.com Inf ormation Required International Customers Hach maintains a w[...]

40 Section 10 Repair Service A uthorization m ust be obtained fr om Hach Compan y before sending any items f or repair . Please contact the Ha ch Service Center serving y our location. In the Uni ted States: Hach Company Ames Service 100 Dayton Avenue Ames, Iowa 50010 (800) 227-422 4 (U.S.A. only) FAX: (515) 232-3835 In Canada: Hach Sales & Ser[...]

41 Section 11 Limited W arranty Hach Company w arrants its products to the original purchaser against an y def ects that are due to f aulty material or workmanship for a per iod of one yea r from date of shipment unless otherwise noted in the product man ual. In the e v ent that a defe ct is discov ered during the warranty period, Hach Company a gr[...]

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43 Section 12 Compliance Inf ormation Hach Company certifies this instrument was tested thoroug hly , inspected and f ound to meet its pub lished specifications when it w as shipped from the f actory . The Model sc100 Cont roller/sc100 0 Cont roller and the pH Combinat ion sensor has been tested and is certified as indicated to the f ollowing instr[...]

44 Compliance Inf ormation Canadian Interference-causing Equi pment Regulation, IECS-003, Class A Suppor ting test records by Hewlett P ackard, F o rt Collins, Colorado Hardware T est Center (A2LA # 0905- 01) an d ce r tified compliance by Hach Company . This Class A digital apparat us meets all requirements of the Canadian Interf erence- Causing E[...]

45 Appendix A Modbus Register Inf ormation T able 8 Sensor Modbu s Registers Group Name T ag Name Register # Data Ty p e Length R/W Description T ags SensorMeasT ag 40001 Integer 1 R Se nsor measurement tag Measurements pHMeas 40002 F loat 2 R pH /ORP measurement T ags T empMeasT ag 40004 Integer 1 R T emperature measurement tag Measurements T empD[...]

46 Modbus Register Inf ormation Configuration CalW ar ningDays 40076 Integer 1 R/W Calibration war ning days Configuration SensorW ar ningDays 40077 Integer 1 R/W Sensor war ning days T able 8 Sensor Modbus Regist ers Group Name T ag Name Register # Data Ty p e Length R/W Descr iption[...]

47 Appendix B General pH Information B.1 pH Measurement Theory pH is the negativ e logarithm of the h ydrogen ion activity and a me asure of the acidity or alkalinity of a solution. pH = –log A[H+] pH is nor mally m easured u sing a glas s electrode and a ref erence electrode . The glas s electrode acts as a transd ucer , convert ing chemic al en[...]

48 General pH Information B.2 PID Contr oller Basics A pH control loop oper ates as fo llows: The pH meter measure s the value of th e pH in the effluent, and, if the pH is differ ent from the setpoint, the contro ller actuates the reagent pump (or v alve) that adds reagent to a mixing t ank. The added reagent adjust s the pH value of the proces s.[...]

49 General pH Inf ormation Integral The integr al v alue is used to re duce the steady stat e error , between the pro cess v alue and the setpoin t, to zero . F or example, assume a proces s can be manually controlled a t a lev el of pH 8.0 b y sending a 35% control output le vel to a reagent pu mp . Now , say that the system is set up for the cont[...]

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51 Inde x B Buttons List box ........................ ................ ................. ..... 23 Toolbar ..................... ................ ................ ......... 21 C Cleaning Sensor ................... ................ ................ ............ 34 Compliance Info rma tion .................. ................ ......... 43 D Derivative [...]

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