User Manual - Tempco Electric Heater Corporation
Contents
1. Shorted thermocouple leads e Thermocouple is open at tip e Thermocouple lead is broken e Open or shorted heater circuit e Open coil in external contactor Ordering Code Power Input Box 7 4 90 264 VAC 50 60 Hz 1 2 3 4 rec 704 O Control Mode sox 4 1 On Off e Burned out contactor e Burned out line fuses e Defective line switches e Defective circuit breakers If the control still does not function after these points have been checked the instrument should be returned to Tempco for inspection Make sure to use adequate packing materials to prevent damage during shipment Note that no products returned can be accepted without a completed Return Material Authorization RMA form 5 OOO 2 Proportional Signal Input Box 2 1 Thermocouple Type J 2 Thermocouple Type K RTD 100 ohm PT DIN 0 00385 RTD 100 ohm PT JIS 0 00392 Other 2 3 4 5 9 Standard Range Code Box 3 4 0 to 300 C C 50 to 550 F 6 0 to 600 C E 50 to 850 F F 50 to 1100 F Available for large volume orders Consult Tempco for more information 2 0tol00 C A 50 to 200 F 3 0to200 C B 50 to 400 F 0 5 0 to 400 C D 50 to 750 F 1 7 0to 800 C G 50 to 1400 F 8 0 to 1200 C H 0 to 2200 F 9 r Output 1 Box 5 1 Relay 5A 240 VAC Pulse de for SSR drive 20 VDC 20 mA max 4 20 mA linear max load 500 ohms 0 20 mA linear max load 500 ohms 0 10 VDC linear min impedance 52. as jumper points as they may be internally connected causing damage to the unit General Operation Adjust the set point to the temperature desired using the analog knob The OUT lamp will glow red indicating that the control is calling for heat and the relay is closed As the process temperature approaches the set point the control will begin to cycle the heaters on and off When the heater load is turned off the OUT lamp will turn off Temperature Indication Actual process temperature is indicated on the 3 1 2 digit 0 4 10mm red LED display Calibration Instructions Calibration is performed using the four potentiometers located on the bottom of the left hand circuit board Open the control by unlatching the clamps on the top and bottom of the front of the control Allow the control to warm up for at least half an hour before checking the calibration The functions of the potentiometers is as follows VR1 Low scale calibration VR2 Low scale switching point VR3 High scale switching point VR4 High scale calibration You must set the reset adjustment to zero before calibration VR1 and VR4 affect each other so you should calibrate low scale and high scale at least three times each Alarm Operation Optional The TEC 704 has the option of coming equipped with an alarm relay that can be used as a deviation alarm It is called a deviation alarm because the alarm set point maintains the same deviation from the
3. control set point so if the control set point is changed the alarm set point will change with it The relay is rated for a maximum load of 2 amps 240 volts On units that have been ordered with the alarm option there will be an alarm set point adjustment on the front of the control The alarm can be adjusted from 0 10 of the range of the control from the set point in either direction If the alarm adjustment is set to the positive side it will act as a deviation high alarm if it is set to the negative side it will act as a deviation low alarm If it is set at 0 the alarm will energize at the control set point WARNING Failure of the thermocouple RTD sensor heater output relay temperature control or other devices can result in severe damage to a product while in process melting of the heater or a damaging fire An over temperature protection device must be included in your process that will remove all power from the heater circuit if any of the above failures occur It is recommended that this device be classified as a safety control Failure to install such a device where a potential hazard exists could result in damage to equipment and property and injury to personnel Page 3 of 4 Troubleshooting Common causes of failures e Line wires improperly connected e Incorrect voltage between line terminals e No voltage between line terminals e Connections to terminals are loose open or missing e Short across terminals e
4. to local and national codes When wiring the thermocouple make sure that the thermocouple and extension wire conform to the thermocouple type specified by the St FA i H i o o 1 V m 8 instrument The thermocouple and the extension wires must have the SOBA VAC EOOH O ae same polarity and be the same alloy For accurate measurements the 2 ite 9 t Output total lead resistance should not exceed 100 ohms 3 40 To assure effective lead resistance compensation when wiring three Alarmi Com 4 a 11 O wire RTDs Resistance Temperature Detectors make sure that all of Alarm N O 5 12 the leads that connect to the controller are the same gauge and A i3 RID composition Connect the two common wires of the three wire RTD to terminals 11 and 12 When using a two wire RTD install a jumper 7 14 between terminals 11 and 12 Function of Solder Gaps J1 J11 Function of Solder Gaps J12 J13 Open Function J12 313 Cycle time Function eeso hort Short Reverse control pen Open 0 02 sec Linear current or voltage output P Direct controt ocs ocs p30 span P 400 C span C ocs eoc eocsan pocs C ON OFF conmo Page 2 of 4 ae WARNINGS e Dangerous voltages may be present in these instruments Before installation or troubleshooting switch off and isolate power to all equipment If a unit is suspected of being faulty
5. 00K ohms Other Output 2 Box 6 0 Not Available Alarm sox 7 None Relay 2A 240 VAC Deviation alarm Communication sox 8 0 Not Available WARRANTY Tempco Electric Heater Corporation is pleased to offer suggestions on the use of its products However Tempco makes no warranties or representations of any sort regarding the fitness for use or the application of its products by the Purchaser The selection application or use of Tempco products is the Purchaser s responsibility No claims will be allowed for any damages or losses whether direct indirect incidental special or consequential Specifications are subject to change without notice In addition Tempco reserves the right to make changes without notification to the Purchaser to materials or processing that do not affect compliance with any applicable specification TEC Temperature Controllers are warranted to be free from defects in material and workmanship for two 2 years after delivery to the first purchaser for use Tempco s sole responsibility under this warranty at Tempco s option is limited to replacement or repair free of charge or refund of purchase price within the warranty period specified This warranty does not apply to damage resulting from transportation alteration misuse or abuse RETURNS No product returns can be accepted without a completed Return Material Authorization RMA form TECHNICAL SUPPORT Technical questions and tr
6. AC 50 60Hz less than 5VA 32 122 F 0 50 C 10 90 RH non condensing 2000VAC 50 60Hz 1 minute 10 55Hz amplitude 1mm 200m s 20g 0 53 Ib 240g 2 84 72mm x Width 2 84 72mm x Depth 3 03 77mm 2 13 54mm 2 68 square 68mm square Front panel IP 30 Housing and terminals IP 20 Revision 10 2013 Page 1 of 4 Mounting When mounting one of these instruments make sure the control and the ambient temperature remain within the 10 125 F range The control may be mounted in any position Once the control has been inserted into the panel use the two mounting brackets provided with the unit to secure it Use light to moderate pressure Panel Cutout 2 68 68 mm 2 84 72 mm Manual Reset Adjustment The reset adjustment is located on the front of the control Approximately half an hour after adjusting the set point when the process stabilizes it may become necessary to adjust reset as well Start with the reset adjustment pointing to zero If the temperature gee indication stabilizes above the set point adjust the reset to the iene A j x ais A i Mounting Dimensions minus side if the temperature stabilizes below the set point adjust to the plus side Continue making adjustments until the temperature indication stabilizes at the set point Make sure to allow 15 minutes between adjustments for stabilization k j Wiring All wiring should conform
7. TEC 704 The TEC 704 is designed to fit panel cutouts that are 2 68 68mm square 3 minimum Tempco Instruction Manual lt 3 16 DIN Solid State Temperature Controller Relay Output Solid State Output For Heating depth is required to provide clearance for rear terminal connections Input Thermocouple T C RTD Cold junction compensation Sensor break protection Sampling rate Accuracy Common mode rejection ratio Normal mode rejection ratio Control Output Relay SSR drive Current loop Voltage Control action Control Modes On Off differential Proportional band Cycle time Set Point Resolution Accuracy Repeatability Manual reset Alarm Type Power Standard Environmental and Physical Operating Temperature Humidity Dielectric strength Vibration Shock Weight Dimensions Height Depth behind panel Panel cutout Approval Standards EN61326 Protective class Type K J See control label Three wire PT100 DIN or JIS 0 1 C 1 C Upscale 3x per second 1 of span CMRR 120dB min NMRR 60dB min 60Hz 240VAC 5amp Pulsed DC 20VDC at 20mA maximum 4 20mA 0 20mA max load 500Q 0 10VDC min load 500KQ2 Reverse action 1 of span 2 2 of span 20 seconds for relay output 1 second for pulsed output 0 02 second for linear current or voltage output 0 2 of span 2 of span 0 1 of span Up to 2 6 of span adjustable Deviation 10 of span relay 2A 240VAC 90 240V
8. it should be removed and returned to Tempco for evaluation These units do not contain any user serviceable components To minimize the risk of fire or shock hazards avoid exposing these instruments to rain or excessive moisture Do not use these instruments in areas that are prone to hazardous conditions such as excessive shock vibration dirt moisture corrosive gases or oil The ambient temperature of the areas should not exceed the maximum rating specified Wiring Precautions e Before wiring verify the control model number and options on the label Switch the power off while checking e Make sure that the maximum voltage ratings are not exceeded e t is recommended that the power source for these units be protected by fuses or circuit breakers rated at the minimum value possible e All units should be installed inside a suitably grounded metal enclosure to prevent live parts from being accessible to human hands and metal tools e All wiring must conform to the appropriate standards of good practice and local codes and regulations Wiring must be suitable for the voltage current and temperature ratings of the system e Either solderless terminals or stripped leads may be used for power leads However only stripped leads should be used for thermocouple connections in order to prevent compensation and resistance errors e Beware not to over tighten terminal screws e Unused control terminals should not be used
9. oubleshooting help is available from Tempco When calling or writing please give as much background information on the application or process as possible TEMPCO Electric Heater Corporation 607 N Central Avenue Wood Dale IL 60191 1452 USA E mail techsupport tempco com Phone 630 350 2252 Toll Free 800 323 6859 Web www tempco com Page 4 of 4
Download Pdf Manuals
Related Search