PID Controllers Single Loop and Multi Loops

Product Details:

The Microprocessor based PID Temperature / Process Controller that we manufacture are 4 digits 0.5" Red 7-segment display for process variable and 4 digits 0.3” for Set Value. Its unique features include.
Input -U (Universal) J, K, type thermocouple, RTD(Pt-100)/3 wire, 4-20mA (User can select any of these 4 inputs) Input –F (Fixed) Any one factory set input as per user’s requirement – as per the input selection table given below. Range Full +ve range of the selected input (please refer to the range selection table) Resolution 1 oC for thermocouples and 0.1oC for Pt-100 For mA input the display resolution is subject to the required range. Indicating Accuracy +/- 1 oC for Thermocouple throughout the range and +/- 0.1oC for Pt-100 for (4-20)mA absolute to the linear input signal Display 4 digit 0.3" Red 7-segment display for process variable. 4 digit 0.3" Green 7-segment display for set value and PID parameters Output Indication Front Panel LED indications for SSR output. % Control Output and for Alarm status. Control Algorithm PID or ON/OFF selectable (when specified for switching output). Tuning Auto/Manual tuning of PID values. PID Values Proportional Band (P)= 0.0 to 100.0% of Span, Integral (I)= 0.00 to 5.00 resets/minute, Derivative (D) = 0.00 to 5.00miutes, Cycle Time = 2 to 100 seconds. Hysterisis = 0 to 50 counts, (Applicable for DPC-480) Soft start or Ramp time (rt) = 2 to 99 seconds Power Limit (PL) = 0 to 100%. Settings Using front panel feather touch (tactile) key board to set various parameters. Memory Backup Retention of PID and Set values in the built in non-volatile memory - in case of power failure and automatic re-execution of control on power resumption. Control Outputs (Switching) 2 SSR driver 0 to 10VDC pulse (OUT1 and OUT2) Control Outputs (Analog) Analog Outputs (4-20)mA (RL max = 300 Ohms) or 0-5VDC (RL min = 10KOhms) (dual output is also available) Retransmission Output (Analog) 4-20mA, linearized and proportional to the selected input type and range. RL max = 250 Ohms. Alarm Outputs 2 Relay Outputs with programmable hysteresis- can be used as High or Low Alarms. Serial Communication (Optional ) Optically isolated 2 wire RS485 on Modbus RTU protocol. (in Slave mode with programmable mod bus address) in lieu of OUT2

Product Details:

Our range of Micro-controller based PID temperature and process controller is dual heat/cool output in the form of DC pulse with direction control for motorized valves.

Features:

• High-speed microcontroller.

• Single or Dual inputs.

• Full range of the specified input type.

Product Details:

PID Temperature / Process Controller Single Loop (1/16 DIN)
Model Wise Description:

Description:

Libratherm offers new PID controller, Model PID-480. This is designed and developed using the latest microcontroller chip and programmed with the time tested and field proven PID algorithm. PID controllers are mainly used for the precise process control. Unlike On/Off type of oscillatory control, PID control action gives smooth and steady state control. This model offer, all the useful features which are required to control the complex system.

This model accepts factory set single fixed input or the user selectable 4 universal inputs. The control action is user selectable as PID or On/Off for direct (Cool) or reverse(Heat) action. Control outputs are given in the form of optically isolated DC pulse to drive external SSR. The analog PID control output level can also be configured for (0-20) mA or (4-20)mA or (0-5) volt using the front panel key board. Analog output can be used to control heating through thyristor or proportional valve. Additional analog output can also be provided as retransmission output proportional to the process input. Two electromechanical relays are available, which can be used as High and Low alarms.

In brief, PID-480 provides 2 switching SSR output and 2 analog outputs with 2 alarm output. Various combinations of outputs are possible to meet end application. Both Auto and manual tuning of PID values makes the controller versatile and user friendly. The model PID-480 being small in size, can easily be accommodated in small size equipments.

Libratherm also offers customized algorithm for special purpose applications, where user or OEM wants to have control and logic action to suit their application.

Features:

• Microcontroller based design.
• Single loop PID function.
• One Ramp/Soak feature ( Optional -user programmable).
• Available Control - logic (DC pulse) and one analog (12 bit resolution).
• Auto/Manual tuning of PID parameters.
• Field proven Algorithm tested successfully for various process control applications.
• Auto/Manual bumpless transfer.
• One programmable alarms and / or event relay outputs.
• RS 485 serial interface - Optional

Applications:

• Furnace / Oven Temperature control
• Pressure control
• Constant Temperature Bath
• Laboratory equipment.
• Plastic Injection, Blow moulding, Extruder machines
• Material Testing equipments
• Blister / Strip Packaging machines
• Auto Clave, BOD incubators etc…

Additional Information:

• Item Code: PID-480-U_PID-480-F
• Pay Mode Terms: T/T (Bank Transfer)
• Port of Dispatch: Mumbai
• Production Capacity: 1

Product Details:

Model Wise Description:


Description:

Libratherm offers new improved version of PID controllers, Model PID-966. It is designed and developed using the latest microcontroller chip and programmed with the time tested and field proven PID algorithm. PID controllers are mainly used for the precise process control. Unlike On/Off type of oscillatory control, PID control action gives smooth and steady state control. These model offers, all the useful features which are required to control the complex system.

These models accept factory set single or dual fixed input or user selectable  single universal input. The control action is user selectable as PID or On/Off for both direct and reverse or Heat and Cool action. Control outputs are given in the form of optically isolated DC pulse to drive external SSR, Triac / AC SSR to operate AC operated load such as solenoid valve or electro mechanical relay. Linear analog outputs of 4-20mA/0-10VD/0-5VDC are also available and can be used for linear signal operated actuators or Thyristor power regulators.
 
Libratherm also offers customized algorithm for special purpose applications, where user or OEM wants to have control and logic action to suit their application.

Features:

• Microcontroller based design.
• Single loop PID function.
• Available Control - Four logic (DC pulses) and Two analog (12 bit resolution).
• Auto/Manual tuning of PID parameters.
• Field proven Algorithm tested successfully for various process control applications.
• Auto/Manual bump less transfer.
• Two programmable alarms and / or event relay outputs.
• Digital communication on  RS485 Modbus RTU protocol.

Applications:

• Furnace / Oven Temperature control
• Pressure control
• Constant Temperature Bath
• Cold storage and Chilling plants
• Laboratory equipment.
• Plastic Injection, Extruder machines
• Material Testing equipment
• Auto Clave, BOD incubators etc…

Additional Information:

• Item Code: PID-966-U
• Pay Mode Terms: T/T (Bank Transfer)
• Port of Dispatch: Mumbai

Product Details:

Model Wise Description:


Description:

Libratherm offers new high accuracy PID controller, Model PID-485 for systems requiring very precise temperature control accuracy. This is designed and developed using the latest microcontroller chip and 16 bit ADC and programmed with the time tested and field proven PID algorithm. Normally standard PID controllers are available with 4 digit display, whereas this model is designed using 5 digit display for 0.01oC of resolution and control accuracy. PID controllers are mainly used for the precise process control. Unlike On/Off type of oscillatory control, PID control action gives smooth and steady state control. This model offers all the useful features which are required to control very precisely the most complex system.
This model accepts factory set single fixed input of either Pt-100 or Pt-1000.  Control outputs are given in the form of optically isolated DC pulse to drive external SSR.

Features:

• Microcontroller based design. 
•  Single loop PID function.
• 16 bit ADC for 0.01oC indicating /control accuracy
• Field proven Algorithm tested successfully for various process control applications.
• SSR control output

Applications:

• Constant temperature oil bath.
• Oven/Furnace control

Input: J,K, R,S, B type thermocouple, RTD(Pt-100), RTD(Pt-1000), 4-20mA

Range: Full range of the specified input.

(As given in the range selection table below).

Resolution: 0.1 Degree C for thermocouples and 0.01 Degree C for Pt-100 /Pt-1000. For mA input the display resolution is subject to the required range.

Indicating Accuracy: +/- 0.1 Degree C for thermocouples, +/-0.01 Degree C for Pt-100 / Pt-1000 sensors (software linearized) for (4-20)mA absolute to the linear input signal

Display: 5 digit 0.25" Red 7-segment display for process variable. 5 digit 0.25" Green 7-segment display for set value and PID parameters

Output Indication: Front Panel LED indications for SSR output, % Control Output and for Alarm status.

Control Algorithm: Linear or Time proportional PID or ON/OFF selectable

Tuning Auto/Manual tuning of PID values.

PID Values:  Proportional Band (P)= 0.0 to 100.0% of Span, Integral (I)= 0.00 to 5.00 resets/minute, Derivative (D) = 0.00 to 5.00miutes, Cycle Time = 2 to 100 seconds.

Hysterisis = 0 to 50 counts,

Soft start or Ramp time (rt) = 2 to 99 seconds

Power Limit (PL) = 1 to 100%.

Settings Using front panel feather touch (tactile) key board to set various

parameters.

Memory Backup: Retention of PID and Set values in the built in non-volatile memory - in

case of power failure and automatic re-execution of control on power resumption.

Control Outputs(Switching): For external SSR, 0 to 10VDC pulse (OUT1 )

Control Outputs (Analog): Analog Outputs (4-20)mA (RL max = 300 Ohms) or 0-5VDC

(RL min = 10KOhms) (12 bit resolution)

Retransmission Output (Analog): 4-20mA, linearized and proportional to the selected input type and range.

RL max = 250 Ohms. (12 bit resolution) - Optional

Alarm Output: Single Relay Output with programmable hysteresis- can be used as High

or Low Alarms.

Serial Communication(Optional): Optically isolated 2 wire RS485 on Modbus RTU protocol. (in Slave mode with programmable mod bus address) in lieu of OUT2.

Panel Cutout / Terminals: 45 x 45 mm. +/- 0.5 mm. - 16 back panel terminals

Additional Information:

• Item Code: PID-485-F
• Pay Mode Terms: T/T (Bank Transfer)
• Port of Dispatch: Mumbai

Product Details:

Model Wise Description:

Description:

Libratherm offers Four new models of PID controllers ,Model PID-723,PID-966,PID-948 and PID-489. These are designed and developed using the latest microcontroller chip and programmed with the time tested and field proven PID algorithm. PID controllers are mainly used for the precise process control. Unlike On/Off type of oscillatory control, PID control action gives smooth and steady state control. These model offers, all the useful features which are required to control the complex system.

These models accept factory set single or dual fixed input or the user selectable universal input. The control action is user selectable as PID or On/Off for both direct and reverse or Heat and Cool action . Control outputs are given in the form of optically isolated DC pulse to drive external SSR, Triac or AC SSR to operate AC operated load, electro mechanical relay and/or  linear analog output.  The analog output levels can also be configured for (0-20)mA or (4-20)mA or  (0-5) / (0-10) volt  using the front panel key board, 

In brief, PID-723, PID-948 and PID-489 provides 4 switching outputs and 2 analog outputs whereas PID-966 provides 6 switching and two analog outputs. Both Auto and manual tuning of PID values makes the controller versatile and user friendly. The model PID-723,PID-948 and PID-489 being small in size, can easily be accommodated in small size equipments. One Ramp/Soak function allows user to gradually increase the set value and hold the process value for desired soak time.

Features:

• Microcontroller based design.
• Single loop PID function.
• One Ramp/Soak feature (user programmable).
• Available Control - Two logic (DC pulse) and Two analog (12 bit resolution).
• Auto/Manual tuning of PID parameters.
• Field proven Algorithm tested successfully for various process control applications.
• Auto/Manual bump less transfer.
• Two programmable alarms and / or event relay outputs.

Applications:

• Furnace / Oven Temperature control
• Pressure control
• Constant Temperature Bath
• Cold storage and Chilling plants
• Laboratory equipment.
• Plastic Injection, Extruder machines
• Material Testing equipments
• Auto Clave, BOD incubators etc…

Additional Information:

• Item Code: PID-723_PID-966_PID-948_PID-489
• Pay Mode Terms: T/T (Bank Transfer)
• Port of Dispatch: Mumbai

Product Details:

Features:

• Latest and high speed 8-bit microcontroller based design
• 12-bit ADC and 12 bit DAC (4000 or +/-2000 counts)
• Fixed or User selectable input type
• 2 Relays or 2SSR driver and single 4-20mA analogue output
• On-Off, Time Proportional or PID (Direct/Reverse) control action
• Elegant looks and very user friendly operation.
• Light weight and low depth of just 75 mm.
• Operates on 12VDC/24VDC/230VAC / 90-240VAC

Applications:

• Electrical heater control in Boiler, Hot Air generator, heat exchanger etc.…
• Furnace and Oven control
• Deep freezer, chiller compressor control
• Any process control such as %Rh, Ph, ORP, Conductivity, Level etc.
• with High/Low Alarms

Description:

Libratherm  has contributed its 25 years of experience by designing these versatile series of microcontroller based Temperature/Process Indicators and controllers for general purpose Industrial usage.

These are developed and manufactured  to   suit  varied  industrial  temperature  and process indication and  control  applications where precise indicating and controlling accuracy.    

The Indicator series DPI-912 and DPI-902 offers Universal or fixed input of J, K or any other thermocouple, RTD(Pt-100) and 4-20mA linear signal. For temperature measurement 1oC/0.1oC Indicating accuracy is guaranteed using software linearization algorithm and with linearized retransmission output. Please see details specification sheet as given below.

Additional Information:

• Item Code: DPI-902_DPI-912
• Pay Mode Terms: T/T (Bank Transfer)

Product Details:

Description of 5 digit PID Temperature Controller  PID-967:

Libratherm offers 5 digit PID controller model PID-967, which is designed and developed using the latest high speed 8 bit microcontroller chip incorporating 16 bit ADC and 12 bit DAC and programmed with the time tested and field proven PID algorithm. PID controllers are mainly used for the precise process control. Unlike On/Off type of oscillatory control, PID control action gives smooth and steady state control. This model offers all the useful features which are required to control the complex system.

PID-967 accepts universal single input. The control action is user selectable as PID or On/Off for both direct and reverse or Heat and Cool action. Control outputs are given in the form of optically isolated DC pulse to drive external SSR, Triac or AC SSR to operate AC operated load, electro mechanical relay and/or  linear analog output of 4-20mA,0-5V or 0-10VDC to drive external thyristor based power regulators.

Features:

Microcontroller based design.

5 digit display with resolution of 0.1oC for high temperature measurement

User selectable input type T/C,RTD, 4-20mA, 0-10VDC

Single loop PID function.

One Ramp/Soak feature (user programmable).

Auto/Manual tuning of PID parameters.

Field proven Algorithm tested successfully for various process control applications.

RS485 digital interface for PC connectivity

Additional Information:

• Item Code: PID-967
• Pay Mode Terms: T/T (Bank Transfer)
• Port of Dispatch: Mumbai

Product Details:

Libratherm offers new PID controller, Model PID-480. This is designed and developed using the latest microcontroller chip and programmed with the time-tested and field-proven PID algorithm. PID controllers are mainly used for the precise process control. Unlike On/Off type of oscillatory control, PID control action gives smooth and steady-state control. This model offer, all the useful features which are required to control the complex system.

This model accepts factory set single fixed input or the user selectable universal input. The control action is user selectable as PID or On/Off for both direct and reverse or Heat and Cool action. Control outputs are given in the form of optically isolated DC pulse to drive external SSR, Triac or AC SSR to operate AC operated load, electromechanical relay and/or linear analog output. The analog output levels can also be configured for (0-20)mA or (4-20)mA or (0-5) volt using the front panel keyboard.

In brief, PID-480 provides 2 switching outputs and 2 analog outputs. Both Auto and manual tuning of PID values makes the controller versatile and user-friendly. The model PID-480 being small in size, can easily be accommodated in small size equipment. One Ramp/Soak function allows user to gradually increase the set value and hold the process value for desired soak time.

Libratherm also offers customized algorithm for special purpose applications, where user or OEM wants to have control and logic action to suit their application.

Additional Information:

• Item Code: PID-480

Product Details:

Model Wise Description:


Description:
Libratherm offers Microprocessor based one to eight loop PID Temperature Controller (Model PID-8000) for processes requiring multiple zones heating or heating plus cooling control.  It is most suitable for difficult process, which results in frequent system disturbances, and applications where simultaneous and accurate temperature control of number of heating/cooling zone is required. It also eliminates the need for number of individual PID or ON/OFF Temperature Controllers thereby saves on cost. PID-8000 can accept 8 similar type of Thermocouples or RTD (Pt-100) inputs and can provide switching PID or ON/OFF Control output in the form of DC Pulses or SSR Drivers for heating and cooling. It can also simultaneously provide 8 analog PID control Outputs in the form of (4-20mA) or (0-5) volt, which can be used to drive external SCR Heater Power Controller or other actuators. Open or Faulty sensor indications for each zone is also displayed with the respective Zone No. Each zone loop parameters like PID, SET, Hysterisis, Power Limit and Ramp Time values can be independently programmed from the user-friendly front panel membrane keyboard.

The display scan rate is programmable from 1 to 99 seconds, whereas the internal control scanning is at the rate of 100mS. It also provides common High and Low alarm relay outputs, which can be used for external temperature dependent, inter locking or audio-visual alarms. In brief, PID-8000 is as good as 8 independent PID controllers in a single enclosure, with facility of different input per channel, different set point per channel and different output per channel – a unique feature. 

The serial interface of RS-485 in Modbus protocol is also optionally available for computer interface. The supporting window based software allows user to monitor behavior all the heating zones in both graphical and tabular form.

Features:

• Microprocessor based design.
• Elegant looks and Very easy to operate.
• Accepts all types of maximum 8 inputs.
• PID or ON / Off  heat and cool action per channel.
• All zones are individually configurable for Heat or Cool.
• Compact in size – ½ DIN (192 x 96 x 200 mm).
• Versatile application and sturdy in operation.
• Accuracy better than +/- 0.1 % of the full scale.
• RS 485 / RS 232 Serial communication available.

Application:

• Plastic extruders for pipes, sheets etc.
• Plastic injection, for runner less moulding
• Heat treatment using tunnel furnace
• Large furnace and oven for homogeneous control
• Environmental chambers
• Multi zone furnace
• Laboratory equipments etc…

Additional Information:

• Item Code: PID-8000-HC-8
• Pay Mode Terms: T/T (Bank Transfer)
• Port of Dispatch: Mumbai