SPECIFICATIONS : - SAFETY INSTRUCTION : 1. DISPLAY TYPE : Dual 4- Digit 7 Segment LED 4 Digit Bright Red (PV) 4 Digit Luminous Green (SV)

Transcription

1 USER S OPERATING MANUAL FOR PID DIGITAL TEMPERATURE LER (Mdels: AI / / / / 6) AI- ( X ) AI- ( X ) AI- (6 X 6) AI-6 (6 X ) AI- ( X 6) SPECIFICATIONS : - SAFETY INSTRUCTION :. TYPE : Dual - Digit Segment LED Digit Bright Red () Digit Luminus Green (SV) STATUS LED S : OP : Main Cntrl Output OP : Alarm Status : Sak Timer TUNE : Tuning Status (Only fr AI-). INPUT Sensr input Range Sensr Type Fe-k(J) T/C Cr-AL(K) T/C (R) T/C (S) T/C Pt-(RTD) Mdel n. Display height () Display height (SV) Pt-(RTD.) Sampling Time Reslutin CJC fr TC LWC fr Pt- Digital Filter 3. RELAY OUTPUT Cntact type Cntact Rating Life expectancy Islatin 6. ENVIRONMENTAL Operating Range Strage Humidity. POWER SUPPLY Supply Vltage Cnsumptin. PHYSICAL Husing Mdel n. Weight (gms.) AI- AI- AI- AI-6 AI Range ~ 6 C - ~ 3 C ~ C ~ C - ~ C : TC:J,K,R,S & RTD: Pt- : Refer belw table. Reslutin Accuracy } ± -. ~. C. : msec. : C/. C(Only fr RTD) : Built in autmatic : Built in upt E max. : t Sec. : N/O, CM, N/C : VAC r 3 VDC : >,, peratins : Inherent. SSR DRIVE OUTPUT Drive Capacity : 3mA. Islatin : Nn-Islated.. FUNCTION Output : Main Cntrl utput Output : Prgrammable ) Auxiliary cntrl ) Alarm 3) Sak timer ) Alarm + Sak timer Cntrl Actin : ON-OFF/PID (Select) Cntrl Mde : Heat/Cl (Select) Cmpliance : ---- : ~ C, ~% Rh : % Rh (Nn-cndensing) : ~VAC, /6Hz. : W Maximum. ±.3 C : ABS Plastic AI- AI- AI- AI-6 AI- 3 This cntrller is meant fr temperature cntrl applicatins. It is imprtant t read the manual prir t installing r cmmissining f cntrller. All safety related instructin appearing in this manual must be fllwed t ensure safety f the perating persnnel as well as the instrument. GENERAL The cntrller must be cnfigured crrectly fr intended peratin. Incrrect cnfiguratin culd result in damage t the equipment r the prcess under cntrl r it may lead persnnel injury. The cntrller is generally part f cntrl panel and in such a case the terminals shuld nt remain accessible t the user after installatin. MECHANICAL The Cntrller in its installed state must nt cme in clse prximity t any crrsive/cmbustible gases, caustic vapurs, ils, steam r any ther prcess byprducts. The Cntrller in its installed state shuld nt be expsed t carbn dust, salt air, direct sunlight r radiant heat. Ambient temperature and relative humidity surrunding the cntrller must nt exceed the maximum specified limit fr prper peratin f the cntrller. The cntrller in its installed state must be prtected against excessive electrstatic r electrmagnetic interferences. Ventilatin hles prvided n the chassis f the instrument are meant fr thermal dissipatin hence shuld nt be bstructed in the panel. ELECTRICAL The cntrller must be wired as per wiring diagram & it must cmply with lcal electrical regulatin. Care must be taken nt t cnnect AC supplies t lw vltage sensr input. Circuit breaker r mains s/w with fuse (V/A) must be installed between pwer supply and supply terminals t prtect the cntrller frm any pssible damage due t high vltage surges f extended duratin. Circuit breaker and apprpriate fuses must be used fr driving high vltage lads t prtect the cntrller frm any pssible damage due t shrt circuit n lads. T minimize pickup f electrical nise, the wiring fr lw vltage DC and sensr input must be ruted away frm high current pwer cables. Where it is impractical t d this, use shielded grund at bth ends. The cntrller shuld nt be wired t a 3-Phase supply with unearthed star cnnectin. Under fault cnditin such supply culd rise abve 6 VAC which will damage the cntrller. The Electrical nise generated by switching inductive lads might create mmentary Fluctuatin in display, alarm latch up, data lss r permanent damage t the instrument. T reduce this use snubber circuit acrss the lad. It is essential t install a ver Temp. Prtectin device t avid any failure f heating system. Apart frm spiling the prduct, this culd damage the prcess being cntrlled. Dcument Name : OIM AI-X (Ver..) Page f

2 CAUTION: T prevent the risk f electrical shck, switch ff the pwer befre making/remving any cnnectin r remving the cntrller frm its enclsure. MECHANICAL INSTALLATION The label n the cntrller identifies the serial number, wiring cnnectins and batch number. OVER ALL DIMENSIONS & PANEL CUT OUT (IN MM) L:-AI-// TABLE : A B L : AI - A C D H E E PANEL CUTOUT G PANEL CUTOUT F F Mdel Dim AI- AI- AI- 6 AI- AI-6 6 A B C D E F G H B L : AI - 6 C D H G INSTALLATION GUIDELINES : A B C D H E PANEL CUTOUT G F. Prepare the cut-ut with prper dimensin as shwn in figure.. Remve clamp frm cntrller 3. Push the cntrller thrugh panel cut-ut and secure the cntrller in its place by tightening the side clamp. ELECTRICAL INSTALLATION The electrical cnnectin diagram is shwn n the cntrller enclsure as belw L 6 SUPPLY NNO CM RELAY NC 6 NC CM NO RELAY SSR SUPPLY L N 3 6 NO CM NC RELAY NO CM NC RELAY 3 6 L N NO CM NC NO CM NC 3 6 L N SUPPLY NO CM NC NO RELAY CM NC RELAY SSR SSR SSR SUPPLY RELAY RELAY SSR SSR AI- AI- AI - SSR SSR AI - 6/ FRONT PANEL LAYOUT 3 6 AI- OP RE AI- SV START 6 3 AI- OP AI- RE START SV AI- SV OP TUNE RE START 6 3 AI - AI - 6 AI-6 3 OP RE 6 START OP AI- RE 3 AI - 6 START NO. NAME 3 6 OP LED LED LED KEY UP KEY DOWN KEY FUNCTION Glws when OP is ON & flashes when delay time (dly) is in peratin & selected mde is ON-OFF. Glws when is ON & flashes when alarm cnditin persists even after acknwledged OR delay time (dly) is in peratin & selected mde is ON-OFF. Glws when Sak mde is selected & flashes when Sak timer is in peratin. It will display : () Measured value f selected input r Errr messages in run mde.() Parameters Value in prgram mde. It will display : () SP (Main set pint) / (Auxiliary) set value / Set Sak time value/ balance r elapsed sak time in run mde. () Parameter cde in prgram mde. () Fr SP prgramming. () T access Cntrl mde. (3) T access Cnfiguratin mde alngwith UP key. () T scrll the parameter & t stre its value. () T increase/alter parameter value in prgram mde. () T Enter in cnfiguratin mde (alngwith key).(3) T acknwledge Alarm. () T enter in tune mde (alngwith DOWN Key). () T decrease / alter parameter value in prgram mde. () T enter in tune mde ( alngwith UP Key). (3) T start Sak timer. Dcument Name : OIM AI-X (Ver..) Page f

3 POWER UP: At pwer n, fllwing sequence will be prmpted n the display till it reaches t Hme display mde. PROGRAMMING L VERSION HOME USER LIST : T access the user list press key nce. RAMP RATE SV In hme display mde, by pressing DOWN key, User can view the set value f SP & (if = AUXILIARY r mde) r timer value(if = sak mde) sequentially. Here, Lwer display will shw SP-value, -value, Alarm SP-Value & Timer-value by pressing DOWN key and it s respective parameter cde (SP//AL.SP/ ) by pressing UP key. RANGE LSPL ~ HSPL. C t. C User can change SP value using UP/ DOWN keys. Hlding the key, will change the value at a faster rate. Press key t stre the desired value & mve n t the next parameter. This parameter will be available nly if Enabled in Cnfiguratin List. User can set ramp rate/min fr SP (Set Pint) t minimize versht. This parameter is prmpted nly if Cntrl Lgic fr Output is cnfigured fr Heat-Cl. O/p will be autmatically activated /de-activated w.r.t SP & HYS. C O/p will be permanently Activated (ON). AUTO O/p will be permanently De-Activated (OFF). OUTPUT POWER LIMIT LSPL ~ HSPL - t + C t C Sec t. Hrs.. % TO. % This parameter is prmpted if is Enable & utput is cnfigured as () Either abslute auxiliary cntrl r as an alarm (High/Lw) mde. () Either deviatin auxiliary cntrl r as a deviatin alarm mde. (3) As a band alarm(fr all abve Sp has t be enable). This parameter is prmpted nly if utput is cnfigured as sak timer. Cntrller starts the executin f sak time as per the mde selected. Sak timer can be prgrammed using fur different time base in Cnfig. List. LIST : T enter in this mde, press & DOWN key simultaneusly fr 3 sec. User can then set the fllwing cntrl parameters. LOCK CODE PROPORTIONAL BAND INTEGRAL DERIVATIVE CYCLE OUTPUT OFF ~. t. C t Sec. t 3 Sec.. t. Sec. Set this parameter t (Default LOCK CODE) t access Cntrl List. User has a chice t set different Lck Cde via USER LOCK CODE in Cnfig. List. This parameter will be prmpted nly if selected cntrl actin is PID. It sets prprtinal band ver which the utput pwer is adjusted depending upn the errr (SV-). Value f this parameter is autmatically set by Aut tune functin. This parameter will be prmpted nly if selected cntrl actin is PID. It sets the time taken by PID algrithm t remve steady state errr. Value f this parameter is autmatically set by aut tune functin. If set t, this functin will be disabled. This parameter will be prmpted nly if selected cntrl actin is PID. It defines hw strngly the cntrller will react t rate f change f. Value f this parameter is autmatically set by aut tune functin. If set t, this functin will be disabled. This parameter will be prmpted nly if selected cntrl actin is PID. User can set this value based n prcess being cntrlled & type f utput being selected. Fr Relay O/P, cycle time shuld be mre than sec & fr SSR O/P, cycle time shuld be less than sec. This parameter will be prmpted nly if selected cntrl actin is PID. This parameter will decide the maximum utput pwer in % applied t the lad. C min. RANGE t This parameter will be prmpted nly if selected cntrl actin is PID. With this parameter O/P will be Cmpletely OFF after the Set Pint + Offset Value. If, O/P will act Depending upn the PID Value after Set Pint achieved.. C 6. Sec. % 3 Dcument Name : OIM AI-X (Ver..) Page 3 f 6

4 TUNE OFF RANGE % t % This parameter will be prmpted nly if selected cntrl actin is PID. This parameter allws the User t carry ut Aut Tuning functin belw the set pint. (If tune ffset is set t %, tuning will be carried ut at % f the set pint and if set t %, tuning will be carried ut at % f the set pint.) % HYS This parameter will be prmpted nly if selected cntrl actin is ON - OFF. It sets the dead band between ON & OFF switching f the Output. Larger value f hysterisis minimize the number f ON-OFF peratin t the lad. This increases life f actuatrs like cntactrs but, als prduces large errrs (between & SV). t C C DELAY t Sec. This parameter will be prmpted nly if selected cntrl actin is ON - OFF. It sets the main utput Delay time where O/P nce turned OFF will turn ON nly after Delay time, regardless difference between & SP. Als, Delay will be cnsidered at every pwer ON. Sec. HYS t C This parameter will be prmpted nly if selected cntrl mde fr utput is Auxiliary cntrl r an Alarm. The value f this parameter sets the dead band between ON & OFF switching f utput lad. C GAP -. t. C This parameter will be prmpted nly if Cntrl Lgic fr Output is cnfigured fr Heat-Cl. SP (set pint) will be cnsider as (SP-Gap) fr heating. C GAP DELAY DELAY BAND -. t. C t Sec. t Sec.. t C. This parameter will be prmpted nly if Cntrl Lgic fr Output is cnfigured fr Heat-Cl. SP (set pint) will be cnsider as (SP+Gap) fr cling. This parameter will be prmpted nly if Output is cnfigured as an Auxiliary cntrl utput OR Cntrl Lgic is cnfigured fr Heat-Cl. In this mde, it sets the utput Delay time where O/P nce turned OFF will turn ON nly after Delay time, regardless difference between &. Als, Delay will be cnsidered at every pwer ON. This parameter will be prmpted nly if selected cntrl mde fr Output is Sak timer. Depending n end f sak strategy, the value f this parameter sets the activatin time fr when Sak timer is ver. Setting this parameter t will make cntinuusly ON at the end f Sak time till User starts the next cycle. This parameter defines the permissible deviatin f frm SP during sak time cycle. If falls utside the Sak band during sak cycle, Timer halts. Timer will start nly when falls within the sak band. This parameter is ignred if set t. CONFIGURATION LIST : () T enter in this mde, press and hld & UP key simultaneusly fr 3 sec. () Press UP r DOWN key t scrll between parameter ptins. (3) Press key t stre current parameter & mve n t the next parameter. LOCK CODE Set this parameter t (Default LOCK CODE) t access Cnfig. List. User have a chice t set different Lck Cde via USER LOCK CODE in Cnfig. List. This parameter value is set accrding t the type f sensr (Thermcuple r RTD input) cnnected t the cntrller's input terminals. C Sec. Sec. Sec. INPUT TYPE Sensr Type Fe-k(J) T/C Cr-AL(K) T/C (R) T/C Range ~ 6 C - ~ 3 C ~ C Reslutin Accuracy } ± J (S) T/C ~ C Pt-(RTD) - ~ C Pt-(RTD.) -. ~. C. ±.3 C Dcument Name : OIM AI-X (Ver..) Page f

5 LIMIT Sets the minimum limit fr set pint adjustment. It can be set frm minimum specified range f selected sensr t HSPL value. C HIGHER LIMIT Sets the maximum limit fr set pint adjustment. It can be set frm LSPL value t maximum specified range f selected sensr. C PROCESS VALUE OFF Functin f this parameter is t add/subtract a cnstant value t the measured t btain Final fr cntrl applicatins. This parameter value needs t be altered fr ne f the fllwing reasn : - (i) T cmpensate fr knwn thermal gradient. (ii)t match the display values with anther recrder r indicatr measuring the same. C INPUT FILTER The cntrller is equipped with an adaptive digital filter which is used t filter ut any extraneus pulses n the. The filtered Value is used fr all dependent functins. If the signal is fluctuating due t nise, increase the filter time cnstant value. FOR O/P User can select between PID r ON-OFF actin algrithm t be adpted fr utput. PID User can select heating lgic in which OP will remain ON till < SP. ( increases when utput is ON.) LOGIC FOR O/P User can select cling lgic in which OP will remain ON till > SP. ( decreases when utput is ON.) HEAT This parameter will be prmpted nly if selected input is RTD r RTD. and is used fr BOD applicatin. Here OP acts as Heating cntrl & as Cling cntrl. OVERSHOOT This parameter will be prmpted nly if selected cntrl actin is PID. Setting this parameter n higher side will prprtinally slws dwn the rate f rise f t minimize versht (this may cause delay t reach SP). Setting n lwer side will prprtinally r disabling this parameter will increase the rate f rise f (which may cause versht). this ptin if delay is nt required t reach SP. RAMP RATE This parameter will be prmpted nly if OCP (ver sht cntrl pint) is disabled. When enabled, User can set the desired RAMP rate in USER list. When disabled, this parameter will nt be prmpted in USER list. AUTO TUNE This parameter will be prmpted nly if selected cntrl actin is PID. If Enabled, this parameter will be prmpted if user press Up & Dwn keys Simultaneusly fr 3Sec. If d, this parameter will nt be prmpted if user press Up & Dwn keys Simultaneusly fr 3Sec. Enable If Enabled, User can View & edit the Set pint (SP) in USER list. If disabled, User can nly View the Set Pint (SP) but Can nt edit it in USER list. Enable Dcument Name : OIM AI-X (Ver..) Page f

6 OUTPUT This parameter will appear nly if Cntrl lgic is Heat-Cl. If Enabled, User can set Diff. mde fr OUTPUT in USER list. If disabled, User can nt set Diff. mde fr OUTPUT in USER list. OUTPUT This parameter will appear nly if Cntrl lgic is Heat-Cl. will be OFF at Ambient + C value irrespective f utput mde. % This parameter allws the user t select utput as an Auxiliary cntrl. Fr ptins refer Table 3. OUTPUT FUNCTION This parameter allws the user t select utput as an Alarm cntrl. Fr ptins refer Table. This parameter allws the user t select utput as a Sak mde. Fr ptins refer Table. Auxiliary This parameter allws the user t select utput t functin as bth Alarm & Sak. Fr ptins refer Table &. By pressing DOWN key, Lwer display will Tggle between SP-value, -value, Alarm SP-Value(AL.SP) & Timer-value(). MESSAGE By this parameter Lwer display will nly shw the SP-value. Tggle By this parameter Lwer display will nly shw the Timer value( ). USER LOCK CODE Default USER LOCK CODE is t access Cntrl & Cnfiguratin List. User has a chice t set its wn USER LOCK CODE between t, this is t prevent unauthrized access f Cntrl & Cnfiguratin List. TABLE 3 : Belw listed ptins will appear nly if is selected as an Auxiliary Cntrl Mde. If selected, User can set value independently, irrespective f SP. INPUT TYPE In this mde is always related with SP. User can set value with deviatin f ± C w.r.t SP. ABS OUTPUT LOGIC User can select Heat lgic fr cntrl Output in which will remain ON till < ( increases when utput is ON). User can select Cl lgic fr cntrl Output in which will remain ON till > ( decreases when utput is ON). HEAT If Enabled, User can View & edit the Set pint () in USER list. If disabled, User can nt View r edit Set Pint () in USER list. Enable 6 Dcument Name : OIM AI-X (Ver..) Page 6 f

7 TABLE : Belw listed pints will appear nly if O/P is selected as an Alarm mde. In Alarm mde, Cntrller cntinuusly cmpares with either SP (fr deviatin r Band -alarm) r an independent Alarm set pints (fr prcess high and prcess lw alarm). Alarm will ccur when falls utside the set Alarm limits. Als, will energize r de-energize under alarm cnditin as per the Alarm lgic(allg) selected. HYS in Cntrl list decides when t switch OFF the Alarm. Instrument supprts fur types f Alarm as described belw : - Lw Alarm : activates when <. OUTPUT- ON OUTPUT- OFF (Direct acting) OUTPUT- OFF OUTPUT- ON (Reverse acting) High Alarm : activates when >. TYPE OUTPUT- OFF OUTPUT- ON OUTPUT- ON OUTPUT- OFF (Direct acting) (Reverse acting) Deviatin Alarm : activates when exceeds SP ± set deviatin value. SP SP OUTPUT OFF OUTPUT ON OUTPUT ON OUTPUT OFF (Direct acting) (Reverse acting) DEVIATION Band Alarm : activates when falls utside the band w.r.t. SP in either directin. SP SP OUTPUT ON OUTPUT OFF OUTPUT ON OUTPUT OFF OUTPUT ON OUTPUT OFF (Direct acting) (Reverse acting) LOGIC User can select direct Alarm Lgic in which will be ON under alarm cnditin; therwise OFF (used fr audi visual alarm). User can select Reverse Alarm Lgic in which will be ON in nrmal cnditins & will be OFF under alarm cnditins (used t trip the prcess in alarm cnditins). DIRECT INHIBIT If this parameter is set as YES & Alarm cnditin persists, it will Alarm O/P at pwer ON. If this parameter is set as NO & Alarm cnditin persists, it will Enable Alarm O/P at pwer up. NO ACK. Once the Alarm is activated, User has fllwing three ptins t de-activate it. When falls within the prgrammed limits The Alarm will be de-activated autmatically. Once the alarm is activated, it remains activated until acknwledged manually by UP key. Once the alarm is activated, it can be de-activated either by pressing UP key r when falls within the alarm limits. AUTO If Enabled, User can View & edit the Alarm Set pint in USER list. If disabled, User can nt View r edit Alarm Set Pint in USER list. Enable Dcument Name : OIM AI-X (Ver..) Page f

8 TABLE : Belw listed ptin will appear nly if is selected as a sak timer. It defines the behaviur f the cntrller at the end f sak timer cycle. Optins are as belw. If selected, the cntrller maintain at SP indefinitely irrespective f start r end f a sak timer. END OF STRATEGY The cntrller de-energizes OP as sn as the sak time is ver. Here upper display will cntinue t shw & lwer display will shw message "start".next cycle will start nly when user press START key fr 3 sec. BOTH The cntrller energizes fr a time perid prgrammed via (StdL) parameter at the end f a sak time cycle. User can utilise fr audi/visual indicatin. The cntrller executes bth, the Heater OFF and Alarm ON functin as described abve. User can select the timer base f sak time amng the fur ptins as shwn. Minutes & Secnds (Range minutes, secnds). BASE R Minutes (Range minutes). Hurs & Minutes (Range Hurs, minutes). MMMM Hurs (Range. Hurs). DIRECTION FOR If selected, sak timer will increment (frm t set value) (Nte:- User can alter the new time value which shuld be > elapsed time even if sak timer is running. If user sets new time value < elapsed time, running timer will be terminated & End f sak Strategy will be executed. If selected,sak timer will decrement (frm set value t ). (Nte:- User can alter the new time value even when sak timer is running. In this case, balance time f previus set value will be ignred & new cycle will be executed. DN RE OF RUNNING If set as YES, sak time value will nt be stred at the time f pwer failure. If set as NO at pwer ON, sak time will cntinue frm stred value. (Nte: Secnds will nt be stred.) NO User can define different mdes t start the sak timer as fllws : - In this mde, Timer will start after pressing START key fr 3 sec., irrespective f. In this Mde, after pwer ON Timer starts when >= SV. T cntinue with next cycle, user has t either switch Pwer n & ff OR press START key fr 3 sec when STRT message is displayed n the lwer display. R START In this Mde, Timer will start nly after pressing START key fr 3 sec & >=SV fr any f the fllwing cnditins. () At every Pwer ON. () Cmpletin f current sak time cycle. (3) Pwer failure during sak time is in prgress. MOD In this Mde, Timer will start nly after pressing START key fr 3 sec & >=SV fr any f the fllwing cnditins. () At every Pwer ON. () Cmpletin f current sak time cycle. After executing start cmmand, if cycle desn't cmplete due t pwer failure, cycle will cntinue whenever >= SV after restre f pwer. N need t press START key. Nte : - ) User can restart sak time at any mment during its executin, by pressing START key fr 3 sec. Dcument Name : OIM AI-X (Ver..) Page f

9 AUTO TUNING : T enter in this mde, Press and hld UP & DOWN key tgether fr minimum 3 sec. AUTO TUNING This functin will be executed nly if selected cntrl actin is PID & Aut tune is Enable. The Aut-tuning functin can be initiated by setting this parameter t YES. The decimal f LSB flashes till aut tuning functin is in prgress. During Aut-tuning, The cntrller learns the prcess characteristics by itself & calculates required P, I & D values. User can cancel r abrt this feature by setting this parameter t NO. NO USER GUIDE : - ON-OFF ACTION : In this mde, Output (Relay/SSR) remains ON till actual temperature reaches t the set pint value. On reaching t SP, Output turns OFF & remains OFF till actual temperature drps dwn (in Heat Lgic) r raises (in Cl Lgic) equal t hysterisis set by user. (As shwn in Fig. 3. & 3.) TEMP ( C) SP HYSTERISIS AMB TEMP ( C) HYSTERISIS AMB SP O/P ON OFF ON OFF ON O/P ON OFF ON OFF ON O/P HEAT LOGIC / ON-OFF Fig: 3. COOL LOGIC / ON OFF Fig: 3. AUTO TUNING : In this mde, Cntrller learns the prcess characteristics by itself and calculates the required P,I & D values. It can be perfrmed at any time after pwer ON but, it is best t start it when the prcess is at Ambient temperature in rder t minimize versht & undersht. Aut tuning is applied in case f : () Initial set up fr a new prcess. () Substantial change in SP frm previus aut tuning value. (3) Cntrl accuracy is nt satisfactry. If the cntrl perfrmance by using aut-tuning is still unsatisfactry, User can apply further adjustments f P,I & D values as shwn in Table:3 belw. Table: 3 Adjust Symptm Slutin Prprtinal Band Slw Respnse Over Sht r Oscillatins Decrease PB Increase PB Integral Time Derivative Time Slw Respnse Instability r Oscillatin Slw Respnse r Oscillatin High Over Sht Decrease Int Increase Int Decrease Dt Increase Dt ABBREVIATION : C.A. CJC CM LWC : Cntrl Actin : Cld junctin cmpensatin : Cmmn terminal f relay : Lead wire (Length)- cmpensatin NC : Nrmally Clse terminal f relay NO : Nrmally Open terminal f relay OP : Output : Output SP SSR T/C : Set Pint Value (set temp.) : Prcess Value (actual Tmp.) : Slid State Relay : Thermcuple Mfgd by: Innvative Instruments Precisin unrivalled 33, New Snal Link Service Ind. Est. n., Link Rad, Malad (W), Mumbai - 6. Tel: -6636/. Fax: sales@innvativeinstruments.c.in ; Website: innvativeinstruments.c.in Dcument Name : OIM AI-X (Ver..) Page f