Teledyne LXT-220 manuale d’uso

Teledyne Analytical Instruments OPER A TIN G INSTRUCTIONS FOR LX T -2 20 Dissolved Oxygen Controller DANGER To xic g ase s a nd o r fl a mmabl e liq ui ds may b e pre s ent i n t his m onit ori ng sy ste m. Personal protective e q uipment may be required when servicing this instrument. Hazardou s volt ages exist on certain components internally whi[...]

LXT-220 DO Teledyne Analytical Instruments ii Copyright © 2005 Teledyne Instruments/ Analytical Instruments All Right s Reserved . No par t of this m anual may be r epro duced, tra nsmitted, transcribed , stored in a retriev al system, or translated into any o th er lan guage o r computer language in whole or in p art, in any f orm or by an y mean[...]

Dissolved Oxygen Controller Teledyne Analytical Instruments iii Speci fic Model Info rma tion Instrument S erial Nu mber: _______________________ Instrument Ra ng e: _______________ Calibrated for: _______________[...]

LXT-220 DO Teledyne Analytical Instruments iv Safety M e ssages Your safety and the saf ety of others is very important. We have provided ma ny important safety messages in this manual. Please read these me ss ages carefully. A safety message alerts you to potential hazards that could hurt you or others. Eac h saf ety message is associated with a s[...]

Dissolved Oxygen Controller Teledyne Analytical Instruments v IF YOU USE THE ANALYZER IN A MANNER OTHER THAN THAT FOR WHICH IT WAS INTENDED, UNPREDICTABLE B EHAVIOR COULD RESULT POSSIBLY ACCOMPANIED WITH HAZARDOUS CONSEQUENCES . This manual provide s infor mation designe d to guide you through the installation, cali br ation operation and maintenan[...]

LXT-220 DO Teledyne Analytical Instruments vi T ab le of Contents List of Fig ures .............................................................................. ix List of Ta bles ................................................................................ x Introduc ti on .......................................................................[...]

Dissolved Oxygen Controller Teledyne Analytical Instruments vii 3.2.4.2 Setup Sub menu 28 3.2.4.3 Status Menu 29 3.2.4.4 Exit/Stay Menu 30 3.3 Configuring the LXT-220 30 3.3.1 Password Protection 31 3.3.1.1 Changing Protection Level 33 3.3.1.2 Changing Opera tional Passwo rd 33 3.3.1.3 Changing Configuration Password 34 3.3.2 4-20 mA Output Assign [...]

LXT-220 DO Teledyne Analytical Instruments viii A.4 Model Designation 55 Index ............................................................................................ 59[...]

Dissolved Oxygen Controller Teledyne Analytical Instruments ix List of Figures Fig ure 1-1 : LXT-220 Fron t Panel ...................................................16 Figure 1-2 : Internal Layout of the LXT-220 DO Controller .. ....... ....17 Fig ure 2-1 : Opening th e Front P an el .............................................20 Figure 2-2 : LXT-[...]

LXT-220 DO Teledyne Analytical Instruments x List of T ables Tab le 3-1 : Pro tectio n L evel Excep tio ns......................................... 3 3 Tab le 4-1 : Troub le shoo ting ........................................................... 52[...]

Dissolved Oxygen Controller Teledyne Analytical Instruments xi This i s a genera l purpo se instrument designed for liquid meas urements i n a non-hazardous ar ea. It is th e customer's responsibility to ensure safety es pecially w hen hot or flammable liquids are being analyzed since the potential of leaks always exist. The customer should en[...]

LXT-220 DO Teledyne Analytical Instruments xii[...]

Dissolved Oxygen Controller Introdu c tion Teledyne Analytical Instruments 13 Introduction 1.1 Over view Tele dyn e ’s Model LXT-220 Dissolved Oxygen Controller is a robust and versatile i nstru m ent fo r the measurement and process control of dissolved oxygen in a l iquid component. Highly customizable, the Model LXT-220 comes standard with a s[...]

Introdu c tion LXT-220 DO Teledyne Analytical Instruments 14 The LXT-220 can be upgraded with pre-pHault Diagnostics & HART Communications opti on w hich alerts the operator to a pending DO, pH, O RP, or ISE el ectrode failure. The LXT-220 i s hous ed in a rugged NEMA -4X housing with all operator switc h e s conven iently located on the front [...]

Dissolved Oxygen Controller Introdu c tion Teledyne Analytical Instruments 15 • PID Outp ut: An optional PID output is ava ilable and provides a 4-20 mA, three-m od e con trol signal. Proportional band is adjustable from 0.1 t o 1,000%. R e s et and Rate a r e adjustabl e from 0.00 to 100 repeats per minute and 0.00 to 1,000 minutes, respecti v e[...]

Introdu c tion LXT-220 DO Teledyne Analytical Instruments 16 1.4 Front Panel The operator interfaces with the instrument from the front panel. Figure 1-1 shows a standard single c h a nne l LXT-220 DO instrument front panel . T he panel includes the LCD display capable of outputting information in bot h a tex tural and graphical format. There are 6[...]

Dissolved Oxygen Controller Introdu c tion Teledyne Analytical Instruments 17 1.5 Int ernal Conn ecti ons A ll u ser co nne c tio ns ar e mad e i nsi de th e uni t on re mov ab le te rmin al bl ock s . Two co ndu it ho le s a re p rov ide d o n th e N EMA -4 X h ous ing , on e f or lo w l evel D C sig na l a nd th e ot he r f or 115 VA C p ow er w [...]

Introdu c tion LXT-220 DO Teledyne Analytical Instruments 18[...]

Dissolved Oxygen Controller Installation Teledyne Analytical Instruments 19 Installation Installation of t h e LXT-220 Contro ller involves: • Unpacking the i ns trument • Mounting • Making Electrical Connections • Configuring the Ins trument • Calibration 2.1 Unpacking the Instrument The LXT-220 Cont ro l ler h as been carefully packaged[...]

Installation LXT-220 DO Teledyne Analytical Instruments 20 • Handrail m oun t ing pl ate • Panel mounting confi gur a tions. U-bolts may be orde r e d separ ately. Refer to the following applicati on dr a w ings for mounting details: 4024011 Dime n sions, wall & pipe mounting. The unit i s supplied with a universal-mounting bracket. Two slo[...]

Dissolved Oxygen Controller Installation Teledyne Analytical Instruments 21 2.3.1 AC Power The LXT-220 re qu i res a 115 VAC 60 H z power source. A 24VD C unit is availa b l e as an op tion. CAUT I ON: MAKE SURE THE CIRCU I T BREAKER PROTECTING THE AC INPUT LINE IS OFF BEFORE WIRING THE LXT-220. Application drawing 4024003 illustrates the proper po[...]

Installation LXT-220 DO Teledyne Analytical Instruments 22 illustrates the prop e r s ensor wiring and is also shown on the affixed label on the bac ksid e of the front pan el. 2.4 Configuring the LX T -22 0 The LXT-220 Cont ro l ler is used for measurement and control for a wide range of liquid a n a ly tical applications. This manual describe s t[...]

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 23 Operation No one instrument h a s all the options described in this document. Some options must be s pecified at the time the instrument is purchased, and are not f i eld-al terable. The instrument can be returned to the factory for re-programming if your requirements change. [...]

Operation LXT-220 DO Teledyne Analytical Instruments 24 3. With t h e cursor on a user se lectable menu item, for instance SETUP in the Paramete r Se l e ction Menu, pressing both horizontal CALIBRATE ke ys w ill take you to the next lower level of scr e ens: 4-20 mA scr een, Relay Setup screen, etc. 4. The ve rt i cal CALIBRAT E keys are used to p[...]

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 25 There may be additional menus not shown in Figure 3-1 depe nd i ng on the opti ons you selected. Figure 3-1: Av a i labl e Menus and Submenus In this manual, screens with a gray background are related to dissolved oxygen measurement or control while white background screens re[...]

Operation LXT-220 DO Teledyne Analytical Instruments 26 2 D O 8 .4 0 8 4.0 % 2 5 .0 O C 1 D O 9 .2 8 9 2.8 % 2 5 .0 O C Ma in Men u , pH 2 O RP 5 00 50 .0 % 25 .0 O C Ma in Men u , ORP Proce du re: 1. Press the upper MENU SELECTION key to rea ch the Contrast Menu. 2. Press both horizontal CA LIBRATE keys simultaneously to enter the calibrate mode. [...]

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 27 1 DO . 00 p p m Cal .0 m V Z ero Cali brat ion M en u DO 3.2.4 Parameter Selection Menu This menu allows you to select what fun c t ion you would like to perform. With t h e cursor on BU FFER, if you press ◄ and ► together the LXT-220 will e n t er th e calibration menus ([...]

Operation LXT-220 DO Teledyne Analytical Instruments 28 4m A 1 .0 0 p p m 2 0m A 1 10 .00 p p m (n o w 18 .84 m a) ( ch1 P V ) Cu rre n t outp u t me n u Plot 4- 20 1 Sam ple .1 m ( ch1 P V ) Cu rre n t outp u t me n u 3.2.4.2 S ETUP S UBM E NU Choosing SETUP from the Paramete r Se lect ion Menu br ings up the first of a serie s of s creens that al[...]

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 29 1 On > 10 .00 p p m 1. Off < 9. 85 p pm ( ch1 P V ) Re la y s et up menu DO L o cus -1 7.0 O C El ectro de Data m enu O RP Noi se f ilt er 10 El ectro de Data m enu O RP 3.2.4.2.2 R ELAY C ONTACT S Relay on/ off se t points ar e adjusted in this menu. The t op lin e defi[...]

Operation LXT-220 DO Teledyne Analytical Instruments 30 F ri 12: 00 :3 7 ( v ola t il e ) T ime of da y clo ck I n p ut -1 50. 4 m V a 0 mV .00 p pm El ectro de Data m enu O RP  E xit  Sta y Ex it / St ay m enu 3.2.4.4 E XI T /S TAY M ENU This menu c onf i rms tha t the user wishes to leave t he se ction that they are c urren tly in. This men[...]

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 31 INPUT A/D CONVERTER TRIM Some instrume n ts ha ve two ch annels measuring two unrelated quantities, and i n t hos e cases both channels can be configured from the same confi gur a tion menus. Depending on opti ons selected 2 additiona l submenus could appear: PID ASSIGN HART A[...]

Operation LXT-220 DO Teledyne Analytical Instruments 32 Figure 3-2: Numerical E ntry Us ing Front Panel Keys After successfully e n t er ing the operational password it remai ns valid for 60 sec onds af t er exiting the calibration mode on that display. During that time a s econd display can be accessed without r e-e n t ering the password. The 60 [...]

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 33 The protecti on l ev el for the operational displays is the number on the le f t s ide of the second line. None of the operational displays are password protected i f t he pro tection level is 0. If it is not zero then, with the excepti ons s hown in Table 3-1, all displays th[...]

Operation LXT-220 DO Teledyne Analytical Instruments 34 Press both (CALIBRATE) ◄ / ► keys again to e n te r a n ew operati on a l passw ord. 1 to 8 digits may he entered. Press either of the menu keys to accept the new password when done. Note: A new password will not be accepted unless the protection level has alr e ady been set to a value gre[...]

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 35 The confi gur a tion p assword is rarely used and the configuration settings are m ore sensit ive, so the password should use more digits than the operational password. With eight base 4 digits the odds of breaking the code i n thre e tries are 3 in 65536 if the user knows tha[...]

Operation LXT-220 DO Teledyne Analytical Instruments 36 cyclic. Use eit h e r of th e ME NU SE LE CT ▲ / ▼ keys to acce p t the selection and m ov e th e cursor back to the left. The displa y ed selec t i on remai ns in e ffect until ch anged and the selecti on is rem e mbered through power outages of inde f i nite l ength. Up to two 4-20 outpu[...]

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 37 output field for each channel. The manual mode a s signment allows the percent ou t put dis pl ay to be associated with any of the 4-20 outputs, in- cluding t h e H ART output. When in the manual mode the 4-20 output is controlled from t h e keybo ard. Zero percent corresponds[...]

Operation LXT-220 DO Teledyne Analytical Instruments 38 a functi on wi t h its own manu al mode output. The 4-20 assignment display will s how if the output is associated w ith an assignable ma nu a l mode. Rega rd l ess of the cause, the affected operational di spl a y manu al mode fields will be g i n w ith a question mark when a conflict exists.[...]

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 39 HART analog 2:, HART analog 3:, HART an alog 4: The next t hre e displays assign the second, third, and fourth variables. The assignments are changed in the same w ay as for the 4-20 outputs. See Section 3.3.2 4-20mA Output Assignments . It is not possible t o assign more th a[...]

Operation LXT-220 DO Teledyne Analytical Instruments 40 T rim O C . 0 U nit 2 5.0 O C Temperature Calibration If the 4-20 selected for the HART analog output is assigned to “missing” or “ unused ” then the digit al representation of the output current will be “ no t a nu mber”, but with up to four digital variables still being tra nsm i[...]

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 41 4m A 1 t rim . 00 0 4 to 20 mA trim The bott o m lin e shows the measured temperature. To change the displayed tempe r a tur e so it agrees with a measured value, place the cursor on the top line t h e n s imultaneously depress both CA LIB RATE ◄ / ► keys. Use the right-si[...]

Operation LXT-220 DO Teledyne Analytical Instruments 42 1 in g a in 1 .0 00 0 40 0.0 m V Input A/D converter trim The next d i s play is for trimming the 20 mA point of output #1 and it works the same a s the 4 mA trim. The 4 mA and 20 mA trims do not interact, a nd t he endpoint trims are linearly interpolated for other output values. Note: The 4-[...]

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 43 On two channel units the ne x t and last display is for trimming the channel 2 a na log input. 3.3.9 PID Assignments Two independe n t P roportional Integral Derivative (PID) controllers are available as options on all instruments, including one channel units. The sub-menu for[...]

Operation LXT-220 DO Teledyne Analytical Instruments 44 displays for them i n the se tup section, and they can be used for alarm purposes or otherwise. The bottom line of the displa y wi l l id entify the relay a s be i ng assigned to a PID output, and it will also show what the input to t h e PID proce s sor is assigned to. A 0% re l ay se t poi n[...]

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 45 D O 7 .8 0 M 50 .0 % 2 5. 0 O C Ma in Men u , DO Proce du re: 1. If not at t h e M ain Menu, press the appropriate MENU SELECTION key to reach the Main Menu. 2. Press both horizontal ◄ ► CALIBRATE keys s imult an e ously to enter t h e c alibrate mode and observe the "[...]

Operation LXT-220 DO Teledyne Analytical Instruments 46 Bu ffer S e tup S tatus Pa ramet er S elect ion Me nu 1DO .0 0 p p m Cal . 0 mV St an dar di zati on m enu pH • BUFFER: Perform a 1 or a 2 point c al ibration • SETUP: Set up the ra ng e of the 4-20 mA output • STATUS: Information onl y. S hows the data stored from the last cali br a tio[...]

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 47 2DO 8 .40 p p m Cal -17 3.8 m V / F S Sp an cal ibrat io n me nu pH 3. Clean t h e el ectrode and insert the sensor into the desired buffer. 4. Press both horizontal CA LIBRATE keys simultaneously to enter the calibrate mode. Observe the diagnostic value on the bottom line c h[...]

Operation LXT-220 DO Teledyne Analytical Instruments 48 3. For diagnostic reasons note the DO and m V/FS values from the prior calibration. 4. Press both horizontal CA LIBRATE keys simultaneously to enter the calibrate mode. Observe the diagnostic value on the bottom line become s a re a l-time value and that the term "CAL" has disappeare[...]

Dissolved Oxygen Controller Operation Teledyne Analytical Instruments 49 2 DO 10. 0 p p m Cal -1 57. 5 m V / FS St an dar di zati on m enu @ fact ory d ef ault set ting s 1 DO .0 0 p p m Cal . 0 m V St an dar di zati on m enu DO @ f actory def au lt set ting s 4. Immediately before making the calibration adjustment, note the current value on the di[...]

Operation LXT-220 DO Teledyne Analytical Instruments 50 3. This procedure i s required at BOTH of the calibration points.[...]

Dissolved Oxygen Controller Maintenance Teledyne Analytical Instruments 51 Maintenance 4.1 Routine Maintenance Aside from normal c leaning rou tine maintenance is limited to recalibration. For recalibration, see Section 3.4 Calibration . However, if service of t h e int ernal components is required always turn off t h e pow er to the i ns trument. [...]

Maintenance LXT-220 DO Teledyne Analytical Instruments 52 Table 4-1: Troubleshooting SYMPTOM POSSIBLE CAUSES SUGGESTED ACTION No power to the instrumen t. Check powe r supply to be su r e the correct voltage is being supplied to the transmitter. Contras t level is set too low. Set con tr ast level to a highe r value. Because the contrast menu i s a[...]

Dissolved Oxygen Controller Appendix Teledyne Analytical Instruments 53 Appendix A.1 Specifications Packaging: NEMA-4X weatherproof encl osure suitable for g e ner al purpose application Power Requireme nts : 1 15/ 220 V A C or op ti on ally 24 V DC 0.2 5A Display: Menu driven Supertwist LCD. Simulta n eously di splays proc ess ID, Process value in[...]

Appendix LXT-220 DO Teledyne Analytical Instruments 54 Maximum Loop Impedance: 800 Ω on 4-20 outputs with internal 24VDC Digital Interface : HART opti on Operating Temper atur e : -4° t o 158°F (-20° to 70°C) Dimensions: 5.67” H, 5.67” W, 6.97” D Temp. Compensation: Automatic, -30 to 140°C, RT D . Accuracy within ±1.0°C over a 0-100°[...]

Dissolved Oxygen Controller Appendix Teledyne Analytical Instruments 55 A.2 Model Designation The standa rd L XT-220 con troller is 110VAC powered unit in a 1/2 DIN, NEMA 4X enc losure. It incorporate s a backlit graphics display and a mem br a ne k eypad. This instrument requires an external 24VDC to power the output s. A n option is available for[...]

Appendix LXT-220 DO Teledyne Analytical Instruments 56 Chann el 3 Input: EX Input from an e x t ern al 4 to 20mA device EX1 Input from an e x t ern al relay contact device * Sentinel Diagnostic: DIAG1Sentinel Di a gnos tic on channel 1 DIAG2Sentinel Di a gnos tic on channel 2 ** Number of 4 to 20 mA Outpu ts: 1mA O ne 4 to 20mA Current Output 2mA T[...]

Dissolved Oxygen Controller Appendix Teledyne Analytical Instruments 57 Optional power require m e n ts: PS1 Standard powered by 120VAC PS2 24 VDC internall y g e ner a ted to power the 4 to 20 mA output ca rds PS3 LXT-220 controller powered by 24 VDC Special options: F2 Output = function of dual inputs: ratio, free chlori n e, differential , a ver[...]

Appendix LXT-220 DO Teledyne Analytical Instruments 58 output must be s pecified. Output configuration options: MA 4-20 mA, standard TMP 4-20 mA, Tempe r a tur e (adjustable -100 to +200°C) PID 4-20 mA, 3 mode cont ro l % (ion) mA % concentration for display and 2nd output (Conductivity only) DIAG Sentinel R e ference Di agnostic As an example: MO[...]

Dissolved Oxygen Controller I ndex Teledyne Analytical Instruments 59 Index A to D conve rter trim, 42 AC power. See power accuracy, 42, 53 address, 55 air, 47 alarm, 13, 15 HI, 13 LO, 13 alarm relay, 40 ana log to dig ita l conv erter , 42 AS SIGN, 35 as si gni ng p a ra met ers , 28 assignment conflict, 36, 37 auto calibration, 54 automatic calib[...]

Index LXT-220 DO Teledyne Analytical Instruments 60 HART assignment, 38, 39 hysteresis, 15 hysterisis, 13 impedance, 54 incrementing a value, 16 input, 13, 27 conditioned, 21 dual, 14 input range, 42 installation, 19 internal clock, 54 internal layout, 17 internal power s upply, 15 isolation, 53 keyboard control, 37 LCD. See display li nea r, 28 li[...]

Dissolved Oxygen Controller I ndex Teledyne Analytical Instruments 61 re lay se tp oi nts , 40 release manual output, 45 repeatability, 53 reset, 15 resistivity, 13, 14, 53 response time, 53 res tore passwo rd, 32 reverse acting, 13, 14 routine maintenance, 51 RS232, 53 safety information, iv saturation point, 47 sc ale fa c tor , 42 sensitivity, 5[...]