Digital Temperature Controller Reference Manual

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4.2.2 Analog-to-digital converter board INSTALLATION AND CALIBRATION The Analog to Digital Converter board is calibrated using the analog input on the rear connector of the Controller Unit (see Figure 4-1). Figure 4-1 Converter Card and Rear Connector DIGITAL TEMPERATURE CONTROLLER REFERENCE MANUAL 4-2
STEP 1: INSTALLATION AND CALIBRATION If the analog input (pin 18 of the rear connector) is in use, disconnect the wiring. If it is not in use, connect the analog select input (pin 9) to digital 0 (pin 11). Switch off the line voltage momentarily to make the analog input active. STEP 2: Short the analog select input (pin 18) to the analog 0 (pin 17). STEP 3: Program into zone A2 a temperature setpoint of 1100.0 oC. See DTC operating manual or Touch Screen Display manual for programming instructions. STEP 4: Select Display of the paddle setpoint for zone A2. STEP 5: Place the probes of the Digital Voltmeter on the test points tp 1 and tp 2 of the board and adjust R13 to give a reference voltage of 10.00V. STEP 6: Turn R12 (zero adjust) clockwise until the setpoint reading starts to decrease. Then turn R12 slowly counter-clockwise until the setpoint reading is 1100.0 oC. STEP 7: Remove the short circuit on the analog input and apply an input voltage of 5.000V to the analog input (pin 18) with respect to analog 0 (pin 17). Adjust R11 (gain adjust) to give a setpoint reading of 100.0 °C and repeat step 5. STEP 8: If the analog input is used, reconnect the analog input to the system. If the analog input is not used, disconnect the short between the analog select input (pin 9) and digital 0 (pin 11) and turn off the line voltage momentarily to make the analog input inactive. 4.2.3 Channel input board with cold junction board The calibration of this board should not be attempted until the user is certain that the Analog to Digital Converter board is correctly calibrated. See Figure 4-2 for the position of the potentiometers. STEP 1: Display the three actual temperatures of the input board. STEP 2: On the Cold Junction Board short the inputs to the three thermocouple inputs. STEP 3: Adjust R26 (R25, R24 (zero adjust)) of the preamplifiers until they all show the same reading on the display. DIGITAL TEMPERATURE CONTROLLER REFERENCE MANUAL 4-3
Page 1 and 2: Digital Temperature Controller Refe
Page 3 and 4: Table of Contents TABLE OF CONTENTS
Page 5 and 6: List of figures LIST OF FIGURES Fig
Page 7 and 8: HIGH ACCURACY THERMOCOUPLE CONTROL
Page 9 and 10: 1.4 Technical Specifications MAX. N
Page 11 and 12: 2.Technical Description 2.1 Introdu
Page 13 and 14: TECHNICAL DESCRIPTION Communication
Page 15 and 16: TECHNICAL DESCRIPTION A maximum of
Page 17 and 18: 2.4.1.2 Spike integral block TECHNI
Page 19 and 20: 3.DTC Configuration 3.1 Introductio
Page 21 and 22: 3.3 Conveyer furnaces DTC CONFIGURA
Page 23: 4.Installation and Calibration 4.1
Page 27 and 28: NOTE INSTALLATION AND CALIBRATION M
Page 29 and 30: 4.3 Repair INSTALLATION AND CALIBRA

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