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DILIGENTMICROCONTROLS9343 623b0b1fdaf7f20001645d3f Products https://www.diligentmc.in
Home Products Diligent Autocon Controllers
Diligent Micro Contr
Diligent Micro Contr
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Diligent Autocon Controllers

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Diligent Micro Controls offers wide range of controllers for automatic control of all types of burners. Classifications of these controllers are based on type of fuel burnt, design of burner, mode of operation, technique of flame sensing, starting pre-requisite interlocks, security interlocks, etc. Diligent Autocon controllers are completely solid state types and use standard and time-proven components. This ensures their continuous & reliable operation over long period even under adverse conditions of electric power and environment. Each Autocon has its unique & user friendly “Status & Fault” display that displays status of various equipments and that of faults that leads to burner failure. This feature is very useful during commissioning and fault finding of burner. A diligent Autocon controller work on 230 V +/- 10%, 50 Hz, 1 phase ac supply and provides live operating commands to switch on or off various equipment related to the burner operation. Alternately, it can be made suitable for operation on 110 V or any other power supply specified by the customer. It has been our experience over past two and half decades that the time delays in the controllers should be preset in the factory rather than in the field. However, we can offer some delays as “field settable” to our new OEMs for their initial trials on their system and later on these can be factory set at the value specified by the OEM. Diligent Autocons are housed in strong m.s. or plastic enclosures. It is provided with either screwable or pluggable connectors for connecting with rest of the burner. These are made in either base mounting type or door mounting type. Salient categories of Diligent Autocon are given below – 1. Diligent Autocon for various fuels. a. Gas fired burner b. Oil fired burner. c. Coal fired burner. d Bagass fired burner. e. Multiple fuel fired burner. f. Customised burners such as for Flame Treatment for plastic printing, for Flame welding of plastic coated paper articles, etc. 2. Diligent Autocon for various modes of operation. a. No process-parameter control. Only operation with safety monitoring. b. Process parameter control by single stage ON/OFF of burner. c. Process parameter control by multi-stage ON/OFF of burner but without damper control. d. Process parameter control by multi-stage ON/OFF of burner but with damper position control. MICRO CONTROLS 2 e. Process parameter control by continuous modulation of single stage burner which continuously adjusts gas & air proportion commensurate with the heat demand. f. Process parameter control by continuous modulation of multi-stage burner which continuously adjusts gas & air quantity commensurate with the heat demand. 3. Diligent Autocon with various techniques of flame detection and flame sensor. a. Photo-Resistor type flame sensor; most cost effective solution for oil fired burner. b. Photo-Voltaic type flame sensor; alternate for oil fired burner. c. Infra-Red type flame sensor; preferred for coal-fired or low calorific fuel burner. d. Ultra-Violet type flame sensor; most reliable but expensive technique of flame detection especially for invisible / blue flames. e. Dual flame sensing technique especially when multiple fuels tend to generate flames with different predominant characteristics. 4. Diligent Autocon for multiple burners in same combustion chamber.

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In continuous control of combustion process, it is required to adjust fuel and air in right proportion continuously according to the variation in the signal from pressure / temperature controller. However, relationship between fuel valve actuator and damper opening does not remain linear due to complex nature of combustion process. Hence, control signal received from controller has to be modified for optimum results of combustion. For this purpose, complete range is split in number of steps and each step can be multiplied by factor which is expected to give optimum combustion results. Multiplying factor can be set at any value between 0.5 – 1.5 independently for each step. Output signal is clamped to either minimum or maximum values whenever it tries to go beyond these values in any step. Diligent RATIOCON 4-20I 16 is one such controller designed by M/s Diligent Micro Controls to accept 4 – 20 mA dc signal from either pressure / temperature controller and provide modified signal which is also lying in 4 – 20 mA range. This controller is housed in standard 96 x 96 mm plastic enclosure and it works on 230 V +/-10%, 50 hz, 1 ph ac supply. 1. Description: ‘Diligent Ratiocon 4-20 I 16’ accepts 4-20 mA signal at the input terminals on the rear panel of the box. This range is split in 16 steps and 16 presets are provided to modify each step independently with multiplier between 0.5 to1.5. 16 LEDs are also provided and LED lights when the input signal crosses the step value. Modified output of 4-20 mA, is provided at the out put terminals on the rear panel of the box. When ever out put tries either to go below 4 mA or to go above 20 mA as a result of multiplying factor setting, internal circuit clamps output to 4 mA in the first case and 20 mA in the second case. Clamped status of <4 mA and > 20 mA is indicated by respective LED on the front panel. Rear panel has two terminals which have to be shorted together during Calibration Mode. Power supply Phase, Neutral & Earth are connected at the respective terminals on the rear panel. This could either be 230 V or 110 V +/-10%, 50 hz, 1 phase AC. RATIOCON has 3 digit display which normally indicates the out put current signal and when the switch on left top corner is pressed it indicates the input current; either actual or calibration. 2. Operation: Diligent RATIOCON becomes operational as soon as the a.c. power supply is connected to it. RATIOCON has two modes of operation; namely Calibration Mode and Normal Mode. MICRO CONTROLS RATIOCON operates in Calibration mode when corresponding terminals on the rear panel are looped together. In this mode internal variable current source is connected to the input stage of RATIOCON and its out put can be varied by the knob located on right top corner. The value of this current can be read on the digital display by pressing the push button. Calibration procedure is as follows – a. Turn Calibration Adjustment knob fully anticlockwise till the current value drops below 4 mA. ‘<4 MA’ LED will light as soon as out put current drops below 4 mA and out put current will be clamped to 4 mA. b. Turn the Cal. Adj. slowly in clockwise direction till the first step LED (marked ‘4’ on the panel) lights. c. Adjust preset below this LED to read the desired out put value on the digital display. d. Repeat ‘b’ & ‘c’ above for all the remaining steps. e. Continue to increase the calibration current beyond 20 mA. ‘>20 mA’ LED will light as soon as the out put current tries to go beyond 20 mA. Out put current will be clamped beyond this at 20 mA. f. This completes the calibration and the loop wired between two terminals on the rear panel can now be removed. RATIOCON enters NORMAL Mode as soon as the loop wired for calibration, is removed. In this case input stage of RATIOCON now receives input signal directly and will generate out put signal according to the preset program. 3. The connections details are given on the rear panel and are self explanatory. 4. This instrument is not site maintainable. 5. Diligent RATIOCON carries warranty for twelve months from the date of its delivery from our works. During this period, we undertake to repair/replace free of cost our defective unit in part or full at our total discretion provided that such unit is brought to our works for rectification and collected there from after satisfactory inspection by the customer at his cost & risk and provided that the defect is due to poor material and/or workmanship and not due to misuse and/or mishandling. This warranty is exclusively limited to the unit supplied by us and we shall not be responsible in any ways for any of the consequences of its use and/or misuse any where. This warranty shall automatically become null & void if our unit is opened/tampered by person not authorised by us. 6. Specifications: Power Supply 230V or 110 V, 50 hz, 1 ph AC supply Input Signal 4 – 20 mA dc. Input burden 100 ohms. Output Signal 4 – 20 mA dc. Output burden 400 ohms. Calibration current source Internal Digital Display 3 digits Output under / over range Output clamped to respective limits. ( Minimum at 4 mA & Maximum at 20 mA). Status LEDs provided Modes of Operation Calibration and Normal Size Standard size 96 mm x 96 mm x 150 mm
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DILIGENT RATIOCON 4-20 I 16
1. Discription: Stabmon is customized protection unit for 3-phase ac stabiliser. It is housed in strong & sleek m.s. enclosure. It operates on 230 V, 1 phase ac supply. Status & Fault LED display is provided on the unit and is very useful during commissioning and fault finding. Over load adjustment over 95% to 105% of rated current, is provided on the unit. Local Reset Switch is provided to reset Stabmon after it trips on fault. A toggle switch is provided to enable and disable ‘Single Phasing Protection’ and its status is indicated by the two-color LED. 2. Operation: Stabmon require 230 V, 1 phase ac supply for its operation. 3-phase supply enters the unit at terminals Rs, Ys & Bs and leaves from terminals Rl, Yl & Bl for connection to load. Phase current of each phase is monitored continuously. So long the current is present in all the three phases and is below the set limit, control relay inside is in energised state. Mains, Load and Fault LEDs are lighted. Status of ‘Single Phasing Protection’ is indicated by last LED. When the switch on the rear panel is pressed, this LED becomes red and when that switch is released, color changes to green. 3. Time-delayed Overload Protection : When any of the phase current exceeds preset limit for more than the permitted preset time (5sec.) continuously, Stabmon switches off internal control relay and latches it in this state. ‘Overload’ LED lights. ‘T.DLY’ LED lights as soon as overload takes place and stays on till it last or till the elapse of the preset time, whichever is earlier. Overload adjustment is provided to adjust trip level from 95% to 105% of the rated current. 4. Single Phasing Protection : Each phase carries current under normal condition and Stabmon continuously monitors it. Internal relay remains energised so long all the three-phase carry current. However, when either one or two phases become open, internal relay switches off and is latched in this state. ‘Single Phasing Protection’ feature is different from the one understood conventionally. This is so because AC stabiliser is required to feed different loads from its phases and, therefore, currents in the phases could be different. In extreme case, it may be required to operate with current in its one or two phase being zero or below the minimum sense level set for the circuit. In such case, Stabmon will not permit its operation. Loads may be switched on/off randomly and this can cause load current to dip MICRO CONTROLS 2 below the minimum sense level momentarily. A short time delay of 2-3 sec. is provided to allow operation with such short lasting dips in phase current. 5. Reverse Phase Sequence Protection : Phase sequence of the 3-phase supply is continuously monitored. If the sequence is normal, Stabmon relay stays in on state. However, whenever this sequence becomes reverse, relay switches off and stays off until sequence is corrected by interchanging any of the two phases. LED designated as ‘REV. PH. SEQ.’ on the display, indicates this fault. 6. Local Reset : Once Stabmon switches off internal relay and latches it in that state due to overload or single phasing fault, ‘Fault’ LED starts flashing and stabiliser is switched off. This state prevails until local reset push button on the front panel, is pressed by operator. 7. Calibration : Stabmon upto 10 Amps rating are directly calibrated and offered in our standard enclosures. For any other higher current ratings, standard 5Amp Stabmon is calibrated with customer-specified auxiliary current transformer. 8. Status & Fault Display : Status & Fault display, is described below- Title Description Mains Lights when 230 V,1ph., ac supply is connected. Load Lights when one or more phases carry current. S. ing Lights when one or two phases are lost and current through them becomes zero. It remains on even after tripping of Stabiliser, until manually reset by pressing local reset push button. O.Load Lights when current in any of the phases, exceeds preset limit beyond preset delay (5 sec.). It remains on even after tripping of Stabiliser until fault is rectified and Reset Push Button is pressed. Rev.Ph.Seq. Lights when phase sequence is negative and remains on till it is made positive by interchanging any of the two phases. It switches off only after local reset push button is pressed T.DLY Lights as soon as current exceeds preset limit and remains on till elapse of preset overload period or dropping of current below the limit. NOR- Steady This LED lights steady under normal condition and starts FLT - Blinks flashing after unit trips on fault. RED- S.ing Disabled This LED turns red when single phasing protection is disabled GRN- S.ing Enabled and it turns green, when single phasing protection, is enabled.
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DILIGENT * STABMON
Diligent Thermocouple Welding Unit is housed in strong powder coated m.s. enclosure which has shoulder strap for ease of carrying on site. It has rechargeable 12 V 4.5 Ah heavy duty Battery with inbuilt SMPS Battery Charger cum Power Supply. 1 meter long multi-strand thick copper cable with Silicon Sheath, Heavy duty Plier and strong circular Magnet are used to connect the Welding Power to the Thermocouple Wires & the surface on which TC is to be welded. the unit has facility to set the Weld Energy Charge Level to suit different gages of Thermocouple wires. The SET Value and CHARGED Value are displayed on Bar Graph display. The desired Charge Level is set on the SET Bar Graph using UP/DOWN push button. This Setting is remembered during operation. Whenever welding is to be done, command is given to start charging the unit to SET value by pressing momentarily the CHARGE Button. Once the Charge level is reached to SET Value, the AUDIO alarm sounds indicating the readiness for welding. Welding operation is performed either in MANUAL mode or AUTO Mode. In Manual mode, the Thermocouple to be welded is firmly held in Pliers at the desired spot, Magnet with wire is located nearer to this spot and then press the WELD Button after getting READY AUDIO ALARM. In AUTO Mode, Pliers holding TC Wires and the Magnet are positioned at the scheduled spot. Press the CHARGE Button. The charge builds up to the SET value and Audio Alarm sounds. Few seconds of this, WELD command is automatically given by Auto Circuit and Weld occurs. The pliers is moved to next spot and the complete cycle repeats automatically. This is carried out till all the TCs are welded. A Bar Graph Display is also provided to indicate the CHARGE Level of battery when Battery Push Button is pressed. An Audio Signal sounds when battery drains below 10.5V (approx). It requires recharge for proper welding quality. The unit can also be operated directly from mains AC Supply if Battery is not available. Diligent Thermocouple Welding Unit size is 240 mm (L) x 170 mm (W) x 170 mm (H) and weighs 4.5 kgs without battery 12 V DC Battery is rated for 4.5 Ah. Its size is 90 mm (L) x 70 mm (W) x 100 mm (H) and it weighs 1.5Kgs. Its useful Charge Level is 60 Volts and can reach up to 80 Volts under supply voltage conditions. The maximum charge can be reached to 0.60 Coulombs.
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DILIGENT THERMOCOUPLE WELDING UNIT

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