Bartlett Genesis LT3140 Technical Manual
Also see for Genesis LT3140: Operation manual
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GENESIS (Model LT3140) – Technical ManualGENERAL DESCRIPTIONThe Genesis, model LT3140 is Bartlett Instrument’s 8th generation kiln controller. We’veenhanced all the great features from older models and added many new ones. The Genesis kiln controllerregulates the temperatures in a kiln according to the program set by the artist. It has two differentprogramming modes, Novice Mode and Advanced Programming. It can control a single zone or multi-zone kiln.POWER SUPPLYThe LT3140 board requires a 24V center-tap transformer, as did its predecessors. It connects tothe board’s bottom three quick connects, labeled AC1, CENTER TAP, and AC2. The VA rating of thetransformer is dependent on the electrical load of the board and relays. The board requires approximately80mA at 12V DC and a relay typically requires approximately 140mA at 12V DC. Therefore, a three-relay system will require a transformer with a minimum rating of 6VA (500mA X 12V DC = 6 VA).OUTPUTSThe LT3140 board has five 12V DC outputs. Four outputs are given power by a safety transistor,outputs 1, 2, 3, and safety. The safety transistor is capacitor coupled to the microprocessor so it onlypowers the output transistors when the microprocessor is operating correctly. Outputs 1, 2, and 3 respondto their respective thermocouple inputs. All outputs are capable of driving a 500mA 12 V DC load.Output 4 is an extra output that can be programmed to run a fan, alarm, or extra kiln section. Themaximum combined output of all outputs is 1 Amp. The safety output powers on at the beginning of afiring and off at the end of the firing. It is used to drive a safety relay that sends line power to theswitching relays on outputs 1, 2, and 3. When using the optional current sensor, wiring one section toeach output will give an Amp reading per section for better diagnostics. See Configuration in thecontrollers Menu for details on the output 4 options.FACTORY CONFIGURATION - “HIDDEN MENU”The “hidden” menu allows programming of options that are normally set at the factory. Theoptions are listed in the order they appear in the menu with a description. The “hidden” menu can beentered by pressing “MENU”, scroll down to “Factory Configuration”, and selecting “FactoryConfiguration. Then, type in the sequence 4, 4, 3, and the Factory Configuration options will bedisplayed. Use the scroll bar on the right to scroll through the options found below: TC Type, MaxProgram Temperature, Max Board Temperature, SSR Mode, Cycle Time, Current Sensor Rating,and Run Factory Diag.TC TypeChange the thermocouple type used with the controller from Type K, Type S, or Type R. Tochange thermocouple type in Factory Configuration, select the thermocouple type being used with thecontroller and press “Save”. When changing from a Type K to a Type S or Type R, you must change thesoftware setting as well as placing a jumper on the circuit board. To change from a Type S or Type R to aType K requires changing the software setting and removing a jumper from the circuit board.WARNING: Using a Type S thermocouple and a controller set for Type K will cause seriousover-fire. Using a Type K thermocouple and a controller set for Type S will cause an under-fire. Type Sthermocouples must use Type S extension wire. Type K thermocouples must use Type K extension wire.If changing thermocouple type be sure to change the extension wire. Make sure the software and jumpersettings match the type of thermocouple and extension wire you are using. |
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