Watlow Ez-Zone PM6 Скачать руководство пользователя страница 14

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Watlow EZ-ZONE

PM PID Controller

•

Chapter 2 Install and Wire

slide back in do not force it . Check the orientation again

and reinsert after correcting .

2. Using your thumbs push on either side of the con-

troller until both latches click.

Chemical Compatibility

This product is compatible with acids, weak alkalis,

alcohols, gamma radiation and ultraviolet radiation.
This product is not compatible with strong alkalis,

organic solvents, fuels, aromatic hydrocarbons, chlori-

nated hydrocarbons, esters and keytones.

Warning:

All electrical power to the controller and controlled circuits

must be disconnected before removing the controller from the

front panel or disconnecting other wiring .
Failure to follow these instructions may cause an electrical

shock and/or sparks that could cause an explosion in class 1,

div . 2 hazardous locations .

Содержание Ez-Zone PM6

Страница 1: ...stered Company Winona Minnesota USA ISO 9001 ISO 9001 TOTAL 3Y earWarranty CU CUS ST TO OM MER ER S SA ATIS TISF FA ACT CTI IO ON N EZ ZONE PM PID Controller Models 1241 Bundy Boulevard Winona Minneso...

Страница 2: ...NSI ISA 12 12 01 2007 File E184390 QUZW QUZW7 See www ul com Unit is compliant with European Union directives See Declaration of Conformity for further details on Directives and Standards used for Com...

Страница 3: ...s 3 After we receive your return we will examine it and try to verify the reason for returning it 4 In cases of manufacturing defect we will enter a repair order replacement order or issue credit for...

Страница 4: ...ome Page 25 Conventions Used in the Menu Pages 28 Chapter 5 Operations Page 30 Chapter 6 Setup Page 41 Chapter 7 Profiling Page 63 Chapter 8 Factory Page 67 Chapter 9 Features 73 Using Lockout to Hide...

Страница 5: ...s High amperage Power Control Output Drives 15 amp resistive loads directly Reduces component count Saves panel space and simplifies wiring Reduces the cost of ownership EZ ZONE configuration communic...

Страница 6: ...the Digital Input Function parameter in the Function Key Menu Setup Page Functions Functions use input signals to calculate a value A function may be as simple as reading a digital input to set a stat...

Страница 7: ...4 6 8 and 9 only programmable event Digital Output or Input 5 6 optional none switched dc off heat cool alarm event Network remote user interface personal computer programmable logic controller human...

Страница 8: ...mm 0 63 in 53 3 mm 2 10 in 31 2 mm 1 23 in 30 9 mm 1 22 in Side Front Top Chapter 2 Install and Wire 2 Dimensions 1 32 DIN 21 6 mm 0 85 in 45 2 mm 1 78 in Recommended panel spacing panel thickness 1 5...

Страница 9: ...4 K4 T2 S2 R2 98 99 CF CD CE B5 D6 D5 15 8 mm 0 62 in 101 6 mm 4 00 in 53 3 mm 2 10 in 53 3 mm 2 10 in 51 2 mm 2 02 in Side Front Top Back 21 6 mm 0 85 in 45 2 mm 1 78 in 45 2 mm 1 78 in 21 6 mm 0 85...

Страница 10: ...M8 Vertical Dimensions 3 95 100 33 2 16 54 86 2 10 53 34 4 00 101 60 62 15 75 06 1 52 40 10 16 1 21 30 73 1 8 DIN PM8 Vertical Recommended Panel Spacing Panel thickness 0 060 in 1 53 mm to 0 375 in 9...

Страница 11: ...in 54 86 mm 3 95 in 100 33 mm 2 10 in 53 34 mm 0 62 in 15 75 mm 4 00 in 101 60 mm 0 06 in 1 52 mm 0 40 in 10 16 mm 1 21 in 30 73 mm 1 8 DIN PM9 Horizontal Recommended Panel Spacing 3 635 in Panel thi...

Страница 12: ...Chapter 2 Install and Wire 1 4 DIN PM4 Dimensions 3 95 100 33 3 95 100 33 62 15 75 06 1 52 50 12 70 1 21 30 73 3 97 100 84 1 4 DIN PM4 Recommended Panel Spacing 3 635 92 3 3 635 92 3 85 21 6 85 21 6 P...

Страница 13: ...ooth is staggered at a different depth from the front so that only one of the tabs on each side is locked onto the ridges at a time Note There is a graduated measurement difference between the upper a...

Страница 14: ...ohols gamma radiation and ultraviolet radiation This product is not compatible with strong alkalis organic solvents fuels aromatic hydrocarbons chlori nated hydrocarbons esters and keytones Warning Al...

Страница 15: ...K _ _ AAAA _ _ output 2 PM _ _ _ _ K _ AAAA _ _ Inputs 1 T1 S1 R1 S2 RTD or current S3 RTD thermocouple current volts or potentiom eter wiper thermistor S1 RTD thermocouple or volts thermistor Univer...

Страница 16: ...ation No Isolation No Isolation No Isolation Low voltage Isolation Controller Power Supply 12 to 40V dc 20 to 28V ac 100 to 240V ac Safety Isolation Safety Isolation EZ ZONE PM Isolation Blocks C Dig...

Страница 17: ...l com mon terminal are referenced to different voltages and must remain isolated Watlow EZ ZONE PM PID Controller 14 Chapter 2 Install and Wire Low Power Power power power 98 99 CF CD CE B5 D6 D5 Slot...

Страница 18: ...different voltages and must remain isolated Input 1 Thermocouple S1 R1 Slot A 2 k maximum source resistance 20 M input impedance 3 microampere open sensor detection Thermocouples are polarity sensitiv...

Страница 19: ...Adjacent terminals may be labeled differently depend ing on the model number Note To prevent damage to the controller do not connect wires to unused terminals Note Maintain electrical isolation betwee...

Страница 20: ...c PM _ _ 2 4 _ _ _ _ _ _ _ _ _ B 24 Vdc common D_ _ Output 1 Switched DC Open Collector dc open collector dc common X1 W1 Y1 Slot A Switched DC 30 mA dc maximum supply cur rent short circuit limited t...

Страница 21: ...l relay solid state relay or open collector output options requires use of an R C sup pressor Output 1 Universal Process Universal Process Output 1 volts or current current volts F1 G1 H1 L2 K2 T1 S1...

Страница 22: ...ith the mechanical relay solid state relay or open collector output options requires use of an R C sup pressor Output 2 NO ARC Relay Form A common normally open L2 K2 Slot A 15 A at 85 to 264V ac resi...

Страница 23: ...the controller do not connect wires to unused terminals Note Maintain electrical isolation between analog input 1 digi tal input outputs switched dc open collector outputs and process outputs to preve...

Страница 24: ...le devices in a network Do not connect more than 16 EZ ZONE PM controllers on a network maximum network length 1 200 meters 4 000 feet 1 8th unit load on EIA 485 bus PM _ _ _ _ _ A AAAA _ _ Modbus RTU...

Страница 25: ...d dc open collector outputs and process outputs to prevent ground loops Note The control output common terminal and the digital com mon terminal are referenced to different voltages and must remain is...

Страница 26: ...ilable with the PM4 8 and PM9 only EZ Key s This key can be programmed to do various tasks such as locking the keyboard restoring user settings etc Zone Display Indicates the controller zone 1 to 9 zo...

Страница 27: ...meter Name Description Range Appears If Attn Attention An active message will cause the display to toggle between the normal settings and the active message in the upper display and Attn in the lower...

Страница 28: ...Page To modify the Home Page proceed to the Factory Menu by pushing and holding the Advance key and the Infinity key for approximately six seconds Upon entering the Factory Page the first menu will be...

Страница 29: ...Menu 3 User Control Mode 1 C M1 Operations Page Monitor Menu 4 Heat Power 1 h pr1 Operations Page Monitor Menu 5 Cool Power 1 C pr1 Operations Page Monitor Menu 6 Autotune 1 aut1 Operations Page Loop...

Страница 30: ...he Home Page Factory Page from Home Page Press both the Advance and Infinity keys for six seconds 70 72 Ai oper Operations Page from Home Page Press both the Up and Down keys for three seconds 70 72 A...

Страница 31: ...by writing the enumerated value of choice using any of the available communications protocols As an ex ample turn to the Setup Page and look at the Analog Input Ai menu and then the Sensor Type Sen p...

Страница 32: ...instance 3 simply add 100 to 1490 to find its address in this case the instance 3 address for Alarm Silence is 1590 To learn more about the Modbus protocol point your browser to http www modbus org No...

Страница 33: ...Status i Ca Calibration Offset Lnr oPEr Linearization Menu 1 Lnr Linearization Su A Source Value A oFSt Offset o u Output Value Pu oPEr Process Value Menu 1 Pu Process Value Su A Source Value A oFSt O...

Страница 34: ...for lead wire resistance or other factors that cause the input read ing to vary from the actual process value 1 999 000 to 9 999 000 F or units 1 110 555 to 5 555 000 C 0 0 Always Instance 1 Map 1 Ma...

Страница 35: ...s C R J B E or N PM8 and 9 only Instance 1 Map 1 Map 2 3310 0x7E 126 1 0x10 16 float R oFSt oFSt Process Value 1 Offset Set an offset to be ap plied to this function s output 1 999 000 to 9 999 000 F...

Страница 36: ...1628 0x6E 110 3 to 4 5 140 LiM oPEr Limit Menu LL S LL S Limit 1 Low Set Point Set the low process value that will trigger the limit 1 999 000 to 9 999 000 F or units 1 128 000 to 5 537 000 C 0 0 F o...

Страница 37: ...remote set point auto Auto 10 man Manual 54 No Remote en able set to yes Instance 1 Map 1 Map 2 2202 2682 0x6B 107 1 0x16 22 uint RWES C M C M Loop 1 Control Mode Select the method that this loop wil...

Страница 38: ...float RWES C Pb C Pb Loop 1 Cool Proportional Band Set the PID propor tional band for the cool outputs 0 001 to 9 999 000 F or units 1 110 555 to 5 555 000 C 25 0 F or units 14 0 C Cool Algo rithm Set...

Страница 39: ...w alarm deviation set the span of units from the closed loop set point that will trig ger a low alarm A negative set point represents a value below closed loop set point A positive set point represent...

Страница 40: ...W Alarm 1 to 4 Alarm Silence Re quest Write to this register to silence an alarm 0 No param eter Instance 1 Map 1 Map 2 1506 1906 Offset to next instance Map1 1 equals 50 Map 2 equals 60 0x6D 109 1 t...

Страница 41: ...nd 27 JL Jump Loop 116 CloC Wait For Time 1543 W bo Wait For Both 210 W Pr Wait For Pro cess 209 W E Wait For Event 144 SoAH Soak 87 ti Time 143 rAtE Rate 81 a profile is active Instance 1 Map 1 Map 2...

Страница 42: ...will track the actual seconds remaining 0 to 9 999 000 seconds 0 Always Instance 1 Map 1 Map 2 2536 4356 0x7A 122 1 9 float RW Ent1 Ent1 Profile Status Active Event Out put 1 View or change the event...

Страница 43: ...lass Instance Attribute hex dec Profibus Index Data Type Read Write Profile Status Current File Indicates current file being executed 0 Instance 1 Map 1 Map 2 2524 4344 0x7A 122 1 3 uint R Note Some v...

Страница 44: ...ut Point 3 op 3 Output Point 3 ip 4 Input Point 4 op 4 Output Point 4 ip 5 Input Point 5 op 5 Output Point 5 ip 6 Input Point 6 op 6 Output Point 6 ip 7 Input Point 7 op 7 Output Point 7 ip 8 Input Po...

Страница 45: ...C LF AC Line Frequency r typ Ramping Type p typ Profile type gse Guaranteed Soak Enable gsd1 Guaranteed Soak Devia tion 1 gsd2 Guaranteed Soak Devia tion 2 si a Source instance A si b Source instance...

Страница 46: ...e 1 Map 1 Map 2 370 370 0x68 104 1 6 4 uint RWES Rt L rt L Analog Input 1 RTD Leads Set to match the number of leads on the RTD wired to this input 2 2 1 3 3 2 2 Sensor Type is set to RTD 100 or RTD 1...

Страница 47: ...12 18 9 float RWES P EE P EE Analog Input 1 Process Error En able Turn the Process Er ror Low feature on or off off Off 62 Low Low 53 Off Sensor Type is set to Millivolts Volts Mil liamps or Potentiom...

Страница 48: ...rization 1 Units Set the units of Source A which is Analog Input 1 nonE None 61 Src Source 1539 rh Relative Humidty 1538 pro Process 75 PWr Power 73 r tp Relative Tempera ture 1541 A tP Absolute Tempe...

Страница 49: ...0x86 134 1 0xC 12 165 float RWES oP 5 op 5 Linearization 1 Output Point 5 Set the value that will be mapped to input 5 1 999 000 to 9 999 000 4 0 Always Instance 1 Map 1 Map 2 3602 0x86 134 1 0x16 22...

Страница 50: ...earization 1 Output Point 10 Set the value that will be mapped to input 10 1 999 000 to 9 999 000 9 0 Always Instance 1 Map 1 Map 2 3612 0x86 134 1 0x1B 27 176 float RWES Pu Set Process Value Fn Fn Pr...

Страница 51: ...t Out B 234 Ent A Profile Event Out A 233 SoF 2 Special Function Output 2 1533 SoF 1 Special Function Output 1 1532 CooL Cool Power Con trol Loop 161 heat Heat Power Con trol Loop 160 ALM Alarm 6 Off...

Страница 52: ...Source is set to Heat or Cool Instance 1 Map 1 Map 2 1016 1136 Offset to next instance Map 1 Map 2 equals 30 0x6A 106 5 to 6 9 87 float RWES o hi o hi Digital Output 5 to 6 High Power Scale The power...

Страница 53: ...1 Map 2 1324 1564 Offset to next instance Map 1 Map 2 equals 20 0x6E 110 1 to 2 3 138 uint RWES Fi Fi Digital Input 5 to 6 Function Instance Select which instance of the Event Function that will be tr...

Страница 54: ...0 0 Cool Algo rithm or Heat Al gorithm is set to PID and TRU TUNE Enable is set to Yes Instance 1 Map 1 Map 2 1912 2392 0x97 151 1 0x11 17 uint RWES t gn t gn Control Loop 1 TRU TUNE Gain Select the r...

Страница 55: ...etting 33 USEr User sets output power to last open loop set point the user en tered 100 User Always Instance 1 Map 1 Map 2 2184 2664 0x6B 107 1 0xD 13 uint RWES MAn MAn Control Loop 1 Manual Power Set...

Страница 56: ...t the time units for the rate with the Ramp Scale parameter 0 0 to 9 999 000 F or units 0 0 to 5 555 000 C 1 0 F or units 1 0 C Ramp Ac tion is set to Startup Set Point or Both Instance 1 Map 1 Map 2...

Страница 57: ...h PID control but can be set anytime Ftb Fixed Time Base 34 utb Variable Time Base 103 Fixed Time Base Instance 1 Map 1 Map 2 882 1002 Offset to next instance Map 1 Map 2 equals 30 0x6A 106 1 to 4 2 8...

Страница 58: ...A Profile Event Out A 233 ALM Alarm 6 Off Always if digit 6 of the part number is an F Instance 1 Map 1 Map 2 722 842 0x76 118 1 2 96 uint RWES r Sr r Sr Output 1 process Retransmit Source Select the...

Страница 59: ...an offset value for a process output 1 999 000 to 9 999 000 F or units 1 110 555 to 5 555 000 C 0 0 F or units 0 0 C Always if digit 6 of the part number is an F Instance 1 Map 1 Map 2 732 852 0x76 1...

Страница 60: ...1 to 4 Sides Select which side or sides will trigger this alarm both Both 13 high High 37 LoW Low 53 Both Type is not set to Off Instance 1 Map 1 Map 2 1486 1886 Offset to next instance Map 1 equals 5...

Страница 61: ...o next instance Map 1 equals 50 for Map 2 equals 60 0x6D 109 1 to 4 0x10 16 30 uint RWES A dL A dL Alarm 1 to 4 Delay Set the span of time that the alarm will be delayed after the pro cess value excee...

Страница 62: ...Control Loop Off level triggered 220 SiL Silence Alarms edge triggered 108 ALM Alarm Reset edge triggered 6 P LoC Lock Keypad level triggered 217 usr r Restore User Set tings edge triggered 227 None A...

Страница 63: ...55 000 C 10 0 F or units 6 0 C Always Instance 1 Map 1 Map 2 2532 4352 0x7A 122 1 7 float RWE Si a Si a Profile Event Input Source Instance A Set the source for WE1 5 to 6 1 Function is set to Compres...

Страница 64: ...2 None Protocol is set to Modbus Instance 1 Map 1 Map 2 2486 2966 0x96 150 1 4 uint RWE M hL M hL Communications 1 Modbus Word Order Select the word or der of the two 16 bit words in the floating poin...

Страница 65: ...umber is a B or E Instance 1 Map 1 Map 2 4006 88 136 1 4 uint RW dow doW Real Time Clock Day of Week sun Sunday 1565 mon Monday 1559 tue Tuesday 1560 wed Wednesday 1561 thUr Thursday 1562 fri Friday 1...

Страница 66: ...point press and hold the Infinity Key for two seconds to return to the Home Page Note Changes made to profile parameters in the Profiling Pages will be saved and will also have an immediate impact on...

Страница 67: ...instance Map 1 equals 50 Map 2 equals 100 0x79 121 1 to 40 1 uint RWE t SP1 t SP1 Step Type Parameters Target Set Point loop 1 Select the set point for this step 1 999 000 to 9 999 000 F or units 1 1...

Страница 68: ...t Event or Wait for Both Instance 1 Map 1 Map 2 2586 4516 Offset to next instance Map 1 equals 50 Map 2 equals 100 0x79 121 1 to 40 9 uint RWE WE 2 WE 2 Step Type Parameters Wait Event 5 6 Select the...

Страница 69: ...End Instance 1 Map 1 Map 2 2596 4526 Offset to next instance Map 1 equals 50 Map 2 equals 100 0x79 121 1 to 40 0xE 14 uint RWE Ent1 Ent1 Step Type Parameters Profile Event Output A Select whether Even...

Страница 70: ...stom Setup par Parameter iid Instance ID LoC FCty Security Setting Menu LoC Security Setting LoC o Operations Page LoC P Profiling Page pas e Password Enable RloC Read Lock SLoC Write Security loC l L...

Страница 71: ...P Str Profile Start idLE Idle Set Point t tUn TRU TUNE Enable r rt Ramp Rate C hy Cool Hysteresis C Pb Cool Proportional Band h hy Heat Hysteresis h Pb Heat Proportion al Band db Dead Band td Time De...

Страница 72: ...vel The user can access the selected level and all lower levels If the Set Lockout Se curity level is higher than the Read Lockout Security the Read Lockout Security level takes priority 1 to 5 5 Alwa...

Страница 73: ...tes a random number when power is cycled If Rolling Password is off fixed number will be dis played Customer Specific 0 Always pass PASS Security Setting Password Number returned from calculation foun...

Страница 74: ...ve all of this con troller s settings to the selected set SEt1 User Set 1 101 SEt2 User Set 2 102 none None 61 None Always Instance 1 Map 1 Map 2 26 26 0x 101 1 0xE 14 118 uint RWE C led C LEd Diagnos...

Страница 75: ...tance 2 Map 1 Map 2 458 468 0x68 104 1 to 2 0xA 10 float RWES ELi S ELi S Calibration Menu 1 to 2 Electrical Input Slope Adjust this value to calibrate the slope of the input value 1 999 000 to 9 999...

Страница 76: ...and Range Low 77 Outputs 77 Duplex 77 NO ARC Relay 78 Retransmitting a Process Value or Set Point 78 Cool Output Curve 78 Control Methods 79 Output Configuration 79 Auto closed loop and Manual open l...

Страница 77: ...t to 90 percent the autotune function utilizes 180 for tuning This is also how autotun ing works in previous Watlow Winona controllers In addition changing the active set point in previous controllers...

Страница 78: ...determines the appropriate output signal and over time adjusts control param eters to optimize responsiveness and stability The TRU TUNE feature does not function for on off control The preferred and...

Страница 79: ...nput 3 Calculate the offset value by subtracting this val ue from the low source signal 4 Set Electrical Input Offset ELi o Factory Page Calibration Menu for this input to the offset value 5 Check the...

Страница 80: ...be 20 00 mA Commonly used scale ranges are 0 to 20 mA 4 to 20 mA 0 to 5V 1 to 5V and 0 to 10V You can create a scale range representing other units for special applications You can reverse scales from...

Страница 81: ...ay coils transformers or solenoids cycle times less than five seconds on hybrid switches on loads that exceed 264V ac through relay on loads that exceed 15 amperes load on loads less than 100 mA NO AR...

Страница 82: ...e between the process value and the set point Then the controller applies power to a control output load to reduce that difference If a valid input signal is not present the control ler will indicate...

Страница 83: ...processes need to maintain a temperature or process value closer to the set point than on off con trol can provide Proportional control provides closer control by adjusting the output when the temper...

Страница 84: ...int Heat Output Active Cool Output Active When the dead band value is a negative val ue both heating and cooling outputs are active when the temperature is near the set point Time Temperature Negative...

Страница 85: ...arms Alarms are activated when the output level process value or temperature leaves a defined range A user can configure how and when an alarm is triggered what action it takes and whether it turns of...

Страница 86: ...m Response with Hysteresis The alarm state continues until the temperature drops to the Alarm High Set Point minus the hysteresis A latching alarm could be turned off by the operator at this point A n...

Страница 87: ...he software connects to the controller look on the left side of your screen under the Param eters Menus for Function Key under Setup Click on the plus sign to reveal the Function Key 1 submenu 3 Click...

Страница 88: ...to 3 Using Password Security It is sometimes desirable to apply a higher level of security to the control where a limited number of menus are visible and not providing access to others without a secu...

Страница 89: ...to the Factory Page as described above 4 Execute the calculation defined below 7b or 8b for either the User or Administrator 5 Enter the result of the calculation in the upper dis play by using the Up...

Страница 90: ...ect in put instance Set alarm set point to correct trip point Set alarm to correct type pro cess deviation or power AL E1 Alarm Error AL E2 AL E3 AL E4 Alarm state cannot be deter mined due to lack of...

Страница 91: ...r disable autotune feature Set digital input to function other than autotune if desired No heat cool action Output does not activate load Output function is incorrectly set Control mode is incorrectly...

Страница 92: ...oller defective Controller output defective Verify output function is correct heat or cool Correct sensor wiring red wire negative Verify and correct wiring Replace heater Replace or repair power con...

Страница 93: ...ithm Control sampling rates input 10Hz outputs 10Hz Profile Ramp Soak Real Time Clock and Bat tery Back up Accuracy typical 30PPM at 77 F 25 C 30 100 PPM at 4 to 149 F 20 to 65 C Battery type lithium...

Страница 94: ...ormA 15A 24 to 240V ac noV dc resis tive load 2 million cycles at rated load Universal process retransmit Output range selectable 0 to 10V dc into a min 1 000 load 0 to 20mA into max 800 load Operator...

Страница 95: ...1 and 2 Hardware Options Output 1 Output 2 CA Switched dc open collector None CH Switched dc open collector NO ARC 15 A power control CC Switched dc open collector Switched dc CJ Switched dc open coll...

Страница 96: ...Instance 54 55 FiL Filter 45 FiL Filter Time 77 Fn Output Function 54 55 Fn Function 47 FUn Function Key Menu 58 gLbL Global Menu 59 gSd Guaranteed Soak Deviation 60 GSd1 Guaranteed Soak Deviation 1...

Страница 97: ...Active Event Output 1 or 2 39 Active Step 38 Active Step Type 38 adaptive tuning 75 Address Modbus 61 Address Standard Bus 60 61 Administrator Password 67 70 agency approvals 2 alarm blocking 83 Alar...

Страница 98: ...nu 31 45 Locked Access Level 67 69 Lock Operations Page 84 Lockout Menu 84 Lock Profiling Page 84 Logic 57 Loop Menu 34 Low Power Scale 49 54 low range 77 low scale 77 Low Set Point Alarm 36 83 Limit...

Страница 99: ...ture units indicator lights 23 Thermistor 16 43 Time Base 49 54 Time Derivative 35 75 81 Time Integral 35 75 80 TRU TUNE Band 51 75 TRU TUNE Enable 51 75 TRU TUNE Gain 51 75 tuning the PID parameters...

Страница 100: ...uirements Industrial Immunity Class B Emissions EN 61000 4 2 1996 A1 A2 Electrostatic Discharge Immunity EN 61000 4 3 2006 Radiated Field Immunity 10V M 80 1000 MHz 3 V M 1 4 2 7 GHz EN 61000 4 4 2004...

Страница 101: ...site www watlow co uk From outside The United Kingdom Tel 44 115 964 0777 Fax 44 115 964 0071 Asia and Pacific Watlow Singapore Pte Ltd 16 Ayer Rajah Crescent 06 03 04 Singapore 139965 Tel 65 6773 948...

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