Ramp and Soak Temperature Controllers

Our range of Single Zone and 2 to 8 Zone Ramp/Soak Programmable PID Temperature Controller includes different products of specifications as per clients requirement.

Ramp / Soak Programmable PID Temperature Controller

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Approx. Price: Rs 9,500 / PieceGet Latest Price

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Product Details:

Minimum Order Quantity	1 Piece
Model No.	PRC-300
Size	96 x 96 mm
Control Type	PID/On-Off
Input Type	RTD, Voltage (mV), Thermocouple, Current (mA)
Control output Type	Analog (mA/mV), SSR
Brand	Libratherm
Type	Digital
Display Type	4 Digit/7 Segment
Voltage	110-230 VAC
Frequency	50/60 Hz
Country of Origin	Made in India
Design	Microcontroller based with 12 bit ADC and dual 12 bit DAC
Power Limit PL	Power Limit to restrict the analog control output = 1 to 100 %.
Control Outputs	DC pulses to drive external SSR,(4-20)mA,RL max = 300 Ohms. Or (0-5)VDC,RL min = 10K ohms.
Ramp or Soak Steps	1 to 16 Steps. (No restrictions in programming - a ramp can be followed by a ramp and a soak can be
Set Temperature	Programmable for each steps in the full range of the specified input. In single set point or profile
Time per each Ramp or Soak Step	1 to 999 mins. (16 Hrs. per step) Or 1 minute to 100 hours
Run from desired step number rFSn	This rFSn facility allows user to skip the ramp/soak steps and run the profile from the desired step
Program Hold Facility	Manual Hold or Auto Hold (Hold back feature for guaranteed Ramp/Soak facility) dHLd= 1 to 50 oC.
Front Panel LEDs	To display the status of control output,Alarms and Ramp/Soak status
Memory Backup	Retention of PID and set values in the non-volatile memory in the event of power failure
Alarm Outputs	High or Low or End of Profile Alarm Relays (OUT2 and OUT3) (contacts rated for 5A @ 230VAC).
Input	Thermocouple type J,K,R,S,B,or RTD(Pt-100)/2 or 3-wire,4-20mA/0-10V from Infrared pyrometer
Serial Communication Optional Feature	Optically isolated 2 wire RS485 interface on Modbus RTU protocol
Panel cut out	92 x 92 mm +/- 0.5 mm
Enclosure	ABS plastic enclosure with ABS bazzel and polycarbonate front.
Range	Subject to the full range of the specified input.
Resolution	0.1 / 1 Degree C Subject to the specified input type and range.
Indicating Accuracy	Better than +/- 0.1% of the range ( by software linearization of curves)
Tuning	Auto / Manual tuning of PID values.
Control Algorithm	PID mode for heating control,On/Off mode with programmable hysteresis.
Soft Start RT	Built in power on soft start (rt) for analog output = 1 to 99 seconds

Model Wise Descriptions:

Model	Product Description
PRC-300	Ramp / Soak Programmable PID Temperature Controller – Single profile of 16 steps (Basic Model)

Description:
Libratherm offers Microcontroller based multiple Ramp / Soak programmable PID temperature controller Models PRC-300, PRC-967 and PRC-309, which are designed to improve reliability, accuracy and control for all processing applications. It features Ramp and Soak functions (the capability to control the temperature and its rate of change over a predetermined time span). PRC-300 and PRC-967 offers single profile of 16 steps and PRC-309 offers one to ten different patterns each of 16 (ramp/soak) steps, which can be programmed into the memory with the user-friendly membrane keyboard. Separate displays are provided to monitor simultaneously; the Process temperature, Set temperature and the Program number. They can also be used as single set point control when the profile control is not desired. They accepts user selectable standard temperature sensors like K, R, S and B type thermocouples, or RTD(Pt-100) or 4-20mA/0-10VDC from infrared pyrometers or 0 to 1200mV from oxygen probe.

The controllers offers both switching outputs in the form of SSR driver or Triac to drive external single or three phase Solid state relays or load contactors and linear analog control outputs in the form of (4-20)mA or (0-5)volt or (0-10)VDC, which can be used to control heater power through Thyristor power regulators (for electrical heating system) or to control the position of a modulating motor valve (for oil or gas fired heating systems). The analog outputs can be directly connected to Libratherm make single phase / three phase SCR based phase angle fired power controllers, which are ideally suitable for both resistive and inductive heating load. Additional 4 relays are also provided for time or temperature dependent event outputs as per the system requirement. The programmed profile and other parameters are retained in the nonvolatile flash memory in the event of power failure.
To monitor the on line temperature profile of the heating system, serial communication port on either RS232 or RS 485 interface can also be optionally provided, the same can be connected to the computer. Libratherm provides standard window based software to view the on line behavior of the heating system in both graphical and tabular format. The controllers can also be operated and programmed through PC.

Features:

Accepts thermocouple, RTD(Pt-100), Infrared pyrometer
Both switching and linear PID control outputs.
Servo start from the process temperature.
User programmable 1-10 different patterns of ramp/soak steps.
Retention and auto-execution of program in case of power failure.
Facility to use as PID and ON / OFF controller.
Interface to computer with window based software

Applications:

Heat Treatment
Investment casting
Environmental Chambers
Laboratory and Industrial Furnace / Oven control
Laboratory and Industrial high temperature furnace control

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Additional Information:

Item Code: PRC-300
Pay Mode Terms: T/T (Bank Transfer)
Port of Dispatch: Mumbai

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Ramp Soak PID Temperature Controller

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Approx. Price: Rs 15,000 / PieceGet Latest Price

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Product Details:

Model No.	PRC-300
Size	96 x 96 mm
Control Type	PID/On-Off
Input Type	RTD, Thermocouple
Control output Type	SSR, Analog (mA/mV)
Brand	Libratherm
Display Type	4 Digit/7 Segment
Auto-tuning	Auto-tuning and manual tuning available
Design	Microcontroller based with 12 bit ADC and dual 12 bit DAC

Model : PRC-300
Ramp / Soak Programmable PID Temperature Controller – Single profile of 16 steps (Basic Model)

Libratherm offers Microcontroller based multiple Ramp / Soak programmable PID temperature controller Models PRC-300, PRC-967 and PRC-309, which are designed to improve reliability, accuracy and control for all processing applications. It features Ramp and Soak functions (the capability to control the temperature and its rate of change over a predetermined time span). PRC-300 and PRC-967 offer single profile of 16 steps and PRC-309 offer one to ten different patterns each of 16 (ramp/soak) steps, which can be programmed into the memory with the user-friendly membrane keyboard. Separate displays are provided to monitor simultaneously; the Process temperature, Set temperature and the Program number. They can also be used as single set point control when the profile control is not desired. They accept users selectable standard temperatures sensors like K, R, S and B-type thermocouples, or RTD(Pt-100) or 4-20mA/0-10VDC from infrared pyrometers or 0 to 1200mV from oxygen probe.

The controllers offers both switching outputs in the form of SSR driver or Triac to drive external single or three phase Solid state relays or load contactors and linear analog control outputs in the form of (4-20)mA or (0-5)volt or (0-10)VDC, which can be used to control heater power through Thyristor power regulators (for electrical heating system) or to control the position of a modulating motor valve (for oil or gas fired heating systems). The analogue outputs can be directly connected to Libratherm make single phase / three phase SCR based phase angle fired power controllers, which are ideally suitable for both resistive and inductive heating load. Additional 4 relays are also provided for time or temperature dependent event outputs as per the system requirement. The programme profile and other parameters are retained in the nonvolatile flash memory in the event of power failure.
To monitor the online temperature profile of the heating system, serial communication port on either RS232 or RS 485 interface can also be optionally provided, the same can be connected to the computer. Libratherm provides standard window-based software to view the online behaviour of the heating system in both graphical and tabular format. The controllers can also be operated and programmed through PC.

Features:

Accepts Thermocouple, RTD(Pt-100), Infrared pyrometer
Both switching and linear PID control outputs.
Servo starts from the process temperature.
User programmable 1-10 different patterns of ramp/soak steps.
Retention and auto-execution of the program in case of power failure.
Facility to use as PID and ON / OFF controller.
Interface to computer with window based software

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Programmable Ramp Soak PID Temperature Controller

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Approx. Price: Rs 7,500 / PieceGet Latest Price

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Product Details:

Minimum Order Quantity	1 Piece
Model No.	PRC-480
Size	48 x 48 mm
Control Type	PID/On-Off
Input Type	Voltage (mV), Thermocouple, RTD, Current (mA)
Control output Type	Analog (mA/mV), SSR
Brand	Libratherm
Power	24 V DC, 240 V AC
Voltage	110-230 VAC
Frequency	50/60 Hz
Country of Origin	Made in India
Panel Cutout or Terminals	45 x 45 mm. +/- 0.5 mm. - 16 back panel terminals
Input Fixed	Any one factory set input as per users requirement as per the input selection table given below.
Enclosure	ABS plastic with polycarbonate front graphic.
Note	Due to continuous improvement - the specifications are subject to change without notice.
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
Indicating Accuracy	+/- 1 oC for Thermocouple throughout the range and +/- 0.1oC for Pt-100 for (4-20)mA
Display	4 digit 0.25Inch Red 7-segment display for PV. 4 digit 0.25Inch Green 7-segment display for SV
Output Indication	Front Panel LED indications for SSR output. % Control Output and for Alarm status.
Input Universal	J,K, R,S,B type thermocouple, RTD(Pt-100)/3 wire, 4-20mA
Settings	Using front panel feather touch (tactile) key board to set various parameters.
Ramp or Soak Steps	1 to 20 Steps. (no restrictions in programming - a ramp can be followed by a ramp and a soak
Set Temperature	Programmable for each steps in the full range of the specified input
Time per Step	1 to 540 mins. (9 Hr. per step) or 1 to 99:59 hour min. (To be specified in ordering info.)
Program Hold Facility	Manual Hold or Auto Hold (Hold back feature for guaranteed Ramp/Soak facility)
Alarm Output	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 slave ID)

Model Wise Description:

Model	Description	Size (mm.)
PRC-480	Single input, Single profile of 20 steps Ramp / Soak Programmable PID Temperature Controller	48 x 48 x 110

Description:

Libratherm offers Microcontroller based multiple Ramp / Soak programmable PID temperature controller Model PRC-480 which is designed to improve reliability, accuracy and control for all temperature control applications. It features Ramp and Soak functions (the capability to control the temperature and its rate of change over a predetermined time span). Single patterns of total twenty (ramp/soak) steps can be programmed into the memory using the front panel keyboard. It can also be used as single set point control when the profile control is not desired. Inputs can be Thermocouple, IR Thermocouple, RTD Temperature Sensors, Voltage, Current Signals and etc.

PRC-480 offers both switching outputs in the form of SSR driver for external SSR or external load contactor and continuous control outputs in the form of (4-20)mA or (0-5)volt control signal, which can be used to control heater power through Thyristor power pack (for electrical heating system) or to control the position of a modulating motor valve (for oil or gas fired heating systems). The analog outputs can be directly connected to Libratherm make single phase / three phase SCR phase angle fired power controller which is ideally suitable for both resistive and inductive heating load. Additional one relay is also provided for time or temperature dependent event outputs as per the system requirement. The programmed profile and other parameters are retained in the nonvolatile memory in the event of power failure.

To monitor the on line temperature profile of the heating system, serial communication port on either RS232 or RS 485 interface can be optionally provided, the same can be connected to the computer. Libratherm provides the window based software to program the controller and to view the on line behavior of the heating system in both graphical and tabular format.

Features:

Accepts standard type of thermocouple, RTD, Voltage or Current signal.
Control output of Relay / TRAIC / DC pulse / (4-20)mA / (0-5)Volt.
Servo start from the current process temperature.
1 to 20 programmable ramp/soak steps.
Retention of program in case of power failure.
Automatic program resumption.
Software password security lock for unauthorized tampering of the set and tune values.

Applications:

Heat Treatment
Wax Burn out furnace used in jewelry making
Environmental Chambers
Furnace / oven control
PWHT and SR heat treatment cycle

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Additional Information:

Item Code: PRC-480
Pay Mode Terms: T/T (Bank Transfer)
Port of Dispatch: Mumbai

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Ramp Soak Programmable PID Temperature Controller

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Approx. Price: Rs 10,500 / PieceGet Latest Price

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Product Details:

Minimum Order Quantity	1 Piece
Model No.	PRC-967
Size	96 x 96 mm
Control Type	PID/On-Off
Input Type	Thermocouple, Current (mA), Voltage (mV), RTD
Control output Type	Analog (mA/mV), SSR
Brand	Libratherm
Display Type	4 Digit/7 Segment
Voltage	110-230 VAC
Frequency	50/60 Hz
Country of Origin	Made in India
Alarm Outputs	High or Low or End of Profile Alarm Relays (OUT2 and OUT3) (contacts rated for 5A @ 230VAC).
Serial Communication Optional Feature	Optically isolated 2 wire RS485 interface on Modbus RTU protocol
Input	Thermocouple type J,K,R,S,B,or RTD(Pt-100)/2 or 3-wire,4-20mA/0-10V from Infrared pyrometer
Panel cut out	92 x 92 mm +/- 0.5 mm
Enclosure	ABS plastic enclosure with ABS bazzel and polycarbonate front.
Range	Subject to the full range of the specified input.
Resolution	0.1 / 1oC Subject to the specified input type and range.
Indicating Accuracy	Better than +/- 0.1% of the range ( by software linearization of curves)
Control Outputs	DC pulses to drive external SSR,(4-20)mA,RL max = 300 Ohms. Or (0-5)VDC,RL min = 10K ohms.
Soft Start RT	Built in power on soft start (rt) for analog output = 1 to 99 seconds
Power Limit PL	Power Limit to restrict the analog control output = 1 to 100 %.
Ramp or Soak Steps	1 to 16 Steps. (No restrictions in programming - a ramp can be followed by a ramp and a soak can be
Set Temperature	Programmable for each steps in the full range of the specified input
Time per each Ramp or Soak Step	1 to 999 mins. (16 Hrs. per step) Or 1 minute to 100 hours
Run from desired step number rFSn	This rFSn facility allows user to skip the ramp/soak steps and run the profile from the desired step
Program Hold Facility	Manual Hold or Auto Hold (Hold back feature for guaranteed Ramp/Soak facility) dHLd= 1 to 50 oC.
Front Panel LEDs	To display the status of control output,Alarms and Ramp/Soak status
Memory Backup	Retention of PID and Set values in the built in non-volatile memory - in case of power failure
Design	Microcontroller based with 12 bit ADC and dual 12 bit DAC

Model Wise Descriptions:

Model	Product Description
PRC-967	Ramp / Soak Programmable PID Temperature Controller (Bigger display) – Single profile of 16 steps

Description:
Libratherm offers Microcontroller based multiple Ramp / Soak programmable PID temperature controller Model PRC-967 which are designed to improve reliability, accuracy and control for all processing applications. It features Ramp and Soak functions (the capability to control the temperature and its rate of change over a predetermined time span). PRC-300 and PRC-967 offers single profile of 16 steps and PRC-309 offers one to ten different patterns each of 16 (ramp/soak) steps, which can be programmed into the memory with the user-friendly membrane keyboard. Separate displays are provided to monitor simultaneously; the Process temperature, Set temperature and the Program number. They can also be used as single set point control when the profile control is not desired. They accepts user selectable standard temperature sensors like K, R, S and B type thermocouples, or RTD(Pt-100) or 4-20mA/0-10VDC from infrared pyrometers or 0 to 1200mV from oxygen probe.

The controllers offers both switching outputs in the form of SSR driver or Triac to drive external single or three phase Solid state relays or load contactors and linear analog control outputs in the form of (4-20)mA or (0-5)volt or (0-10)VDC, which can be used to control heater power through Thyristor power regulators (for electrical heating system) or to control the position of a modulating motor valve (for oil or gas fired heating systems). The analog outputs can be directly connected to Libratherm make single phase / three phase SCR based phase angle fired power controllers, which are ideally suitable for both resistive and inductive heating load. Additional 4 relays are also provided for time or temperature dependent event outputs as per the system requirement. The programmed profile and other parameters are retained in the nonvolatile flash memory in the event of power failure.
To monitor the on line temperature profile of the heating system, serial communication port on either RS232 or RS 485 interface can also be optionally provided, the same can be connected to the computer. Libratherm provides standard window based software to view the on line behavior of the heating system in both graphical and tabular format. The controllers can also be operated and programmed through PC.

Features:

Accepts thermocouple, RTD(Pt-100), Infrared pyrometer
Both switching and linear PID control outputs.
Servo start from the process temperature.
User programmable 1-10 different patterns of ramp/soak steps.
Retention and auto-execution of program in case of power failure.
Facility to use as PID and ON / OFF controller.
Interface to computer with window based software

Applications:

Heat Treatment
Investment casting
Environmental Chambers
Laboratory and Industrial Furnace / Oven control
Laboratory and Industrial high temperature furnace control

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Additional Information:

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

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Programmable PID Temperature Controller

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Approx. Price: Rs 25,000 / PieceGet Latest Price

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Product Details:

Minimum Order Quantity	1 Piece
Model No.	PRC-309
Size	96 x 96 mm
Control Type	PID/On-Off
Input Type	Thermocouple, RTD, Current (mA), Voltage (mV)
Control output Type	SSR, Analog (mA/mV)
Brand	Libratherm
Accuracy	+/- 1%
Resolution	0.1/1 Deg C Subject to the specified input and range
Display Type	4 Digit/7 Segment
Voltage	110-230 VAC
Frequency	50/60 Hz
Enclosure	Metal Powder coated
Digit Display Size	Single Display
Type	Automatic

Ramp / Soak programmable PID temperature controller with 10 patterns and 16 steps are most commonly used for medium and high temperature control applications.

Features:

Design: Microcontroller based 8 bit with 12 bit ADC and 12 bit DAC.
Control Output: DC pulses to drive external SSR, Built-in Triac (5A @ 230VAC) or (4-20)mA or (0-5)VDC output with soft start and power limit.
Alarm Output: High or Low or Event Alarm Relay (5A @ 230VAC).
10 indpendent profile of 16 ramp/soak steps each.

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Ramp Soak PID Temperature Controller PRC-300

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Approx. Price: Rs 12,075 / NumberGet Latest Price

Product Details:

Brand	Libratherm
Model No.	PRC-300 (Part No.: 1702-2)
Size	96 x 96 mm
Control Type	PID/On-Off
Input Type	Current (mA), Thermocouple, Voltage (mV), RTD
Control output Type	Analog (mA/mV), Relay/SSR
Country of Origin	Made in India

PRC-300 : Ramp / Soak Programmable PID Temperature Controller – Single profile of 16 steps (Basic Model).

Description:

Libratherm offers Microcontroller based multiple Ramp/Soak Programmable PID Temperature Controller Model PRC-300 which is designed to improve reliability, accuracy, and control for all processing applications. It features Ramp and Soak functions (the capability to control the temperature and its rate of change over a predetermined time span). This PID SSR Temperature Controller PRC-300 offers a single profile of 16 steps that can be programmed into the memory with the user-friendly membrane keyboard. Separate displays are provided to monitor simultaneously; the Process temperature, Set temperature, and the Program number. They can also be used as single set point control when the profile control is not desired. They accept user-selectable standard temperature sensors like K, R, S, and B type thermocouples.
The Profile Control System offers both switching outputs in the form of SSR driver or Triac to drive external single or three-phase Solid-state relays or load contactors and linear analog control outputs in the form of (4-20)mA or (0-5)volt or (0-10)VDC, which can be used to control heater power through Thyristor Power Regulators (for an electrical heating system) or to control the position of a modulating motor valve (for oil or gas-fired heating systems). The analog outputs can be directly connected to Libratherm make single/three-phase SCR based phase angle fired power controllers, which are ideally suitable for both resistive and inductive heating load. Additional 4 relays are also provided for time or temperature-dependent event outputs as per the system requirement. The programmed profile and other parameters are retained in the nonvolatile flash memory in the event of power failure.
To monitor the online temperature profile of the heating system, a serial communication port on the RS485 interface can also be optionally provided, the same can be connected to the computer. Libratherm offers Microsoft Window-based Software to view the online behavior of the heating system in both graphical and tabular format on the computer screen.
Key Features:

Accepts thermocouple, RTD(Pt-100), Infrared pyrometer.
Both switching and linear PID control outputs.
Servo start from the process temperature.
User programmable single pattern of 16 ramp/soak steps.
Retention and auto-execution of program in case of power failure.
Facility to use as PID and ON / OFF controller.
Interface to computer with window based software.

Application:

Heat Treatment Cycle (Tempering, Hardening, Annealing) control
Investment Casting
Laboratory High Temperature Furnace Control
Laboratory Low Temperature Oven Control
Industrial high temperature furnace control

Ordering Information:

Sr. No.	Specifications	Part No.
1	Input from R, S, B t/c with (SSR + 0-5V or (4-20)mA) control output + High or Low and End of Profile Relay outputs. For High Temperature Furnace control (up to 1700 °C).	1702-1
2	Input from K t/c with only SSR control output + High or Low and End of Profile Relay outputs. For Medium Temperature furnace control (up to 1200 °C).	1702-2
3	Input from K t/c with (SSR + 0-5V or (4-20)mA) control output + High or Low and End of Profile Relay outputs. For Medium Temperature furnace control (up to 1200 °C).	1702-3
4	Input from RTD(Pt-100) with (SSR + 0-5V or (4-20)mA) control output + High or Low and End of Profile Relay outputs. For Low Temperature ovens (up to 400 °C).	1702-4

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Profile Temperature Controller

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Approx. Price: Rs 20,500 / PieceGet Latest Price

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Product Details:

Minimum Order Quantity	1 Piece
Model No.	PRC-312
Control Type	PID/On-Off
Input Type	Thermocouple
Control output Type	Analog (mA/mV), SSR
Usage	Industrial Use
Brand	Libratherm
Display Type	4 Digit/7 Segment
Voltage	110-230 VAC
Frequency	50/60 Hz
Usage/Application	Wax Burnout Furnace Control
Temperature Range	0 to 1200 Degree C
Set Point	Programmable throughout the range. In single set point control mode,the set point can be changed.
Country of Origin	Made in India
Ramp or Soak Steps	1 to 16 Steps. (No restrictions in programming - a ramp can be followed by a ramp and a soak can be
Auto or Manual Control	Auto to Manual bump less transfer of control output - to manually change the percentage of heating.
Relay Outputs	High or Low Alarm relay. End of Profile Relay (contacts rated for 5A @ 230VAC).
Memory Backup	Retention of PID and set values in the non-volatile memory in the event of power failure.
Resolution	1oC Subject to the specified input and range.
Run from desired step facility rFSn	This facility allows user to skip the ramp/soak steps and run the profile from the desired step
Serial Communication Optional	RS485 on Modbus RTU protocol (in Slave mode). Standard window based PC software available at extra
Set Temperature	Programmable for each steps in the full range of the specified input
Supply	115VAC or 240 VAC +/- 10% ( approx. 5VA),50/60Hz.
Time per Step	1 to 540 minutes per step (max. 9 hours per step)
Control Algorithm	PID with pulse width modulation / time proportional On/Off mode with programmable hysteresis. (OUT1)
Control Outputs	12 V DC pulse to drive external single phase or 3 phase SSR
Control mode	Single set point or Ramp/Soak profile mode - user selectable
Delayed Start	Internal timer to start the burn out cycle after the time delay 0.0 to 99.0 Hour (increment @ 0.5 H
Indicating Accuracy	Better than +/-0.1% of the range ( by software linearization of curves)
Input sensor	K type (Cr/Al) thermocouple

Model Wise Descriptions:

Model	Product Description
PRC-312	Programmable Ramp/Soak PID and On-Off temperature controller with 10 profiles each of 16 ramp/soak steps with multiple display

Features:

Designed using high speed microcontroller
Software linearization for +/-1oC indicating accuracy
Time delay function to automatically start the heating cycle after desired time
Sixteen ramp/soak steps – to control burnout heating cycle
User programmable Single or 10 different ramp/soak patterns
Front panel LED/Display indications to monitor online behaviour of the heating cycle
PID control action ensures +/-1oC control accuracy
Time tested and field proven control algorithm
Retention of program in the flash memory
Auto restart of heating cycle on power resumption
High or Low temperature alarm relay
End of heating cycle relay

Description:
Libratherm offers Microcontroller based multiple Ramp / Soak programmable PID temperature controllers which are designed to improve reliability, accuracy and control for wax burnout cycles. They all features Ramp and Soak functions (the capability to control the temperature and its rate of change over a predetermined time span). One to ten different patterns each of total sixteen (ramp/soak) steps can be programmed into the memory with the user-friendly membrane keyboard. Separate displays are provided to monitor simultaneously the Process temperature, Set temperature, Program number, step number, safety temperature and remaining time. Servo start and auto tracking facilities are additional useful features available in these models. Multiple display allows user to view the program status in one glance, without having to press multiple keys. The front panel LED graph shows the status of current step in progress, whether heating ramp, cooling ramp or soaking step. Controllers can also be used as single set point control when the profile control is not desired.

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Additional Information:

Item Code: PRC-312
Port of Dispatch: Mumbai
Production Capacity: 100 per month
Delivery Time: 7 days
Packaging Details: corrugated paper box

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Ramp Soak PID Temperature Controller PRC-967

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Approx. Price: Rs 12,600 / NumberGet Latest Price

Product Details:

Brand	Libratherm
Model No.	PRC-967 (Part No.: 1703-2)
Size	96 x 96 mm
Control Type	PID/On-Off
Input Type	Thermocouple, RTD
Control output Type	Relay/SSR
Country of Origin	Made in India

PRC-967 – Ramp/Soak Programmable PID Temperature Controller (Bigger display) – Single profile of 16 steps.

Description:
Libratherm offers Microcontroller based multiple Ramp/Soak Programmable PID Temperature Controller Model PRC-967 which is designed to improve reliability, accuracy, and control for all processing applications. It features Ramp and Soak functions (the capability to control the temperature and its rate of change over a predetermined time span). This PID Programme Controller PRC-967 offers a single profile of 16 steps that can be programmed into the memory with the user-friendly membrane keyboard. Separate displays are provided to monitor simultaneously; the Process temperature, Set temperature, and the Program number. They can also be used as single set point control when the profile control is not desired. They accept user-selectable standard temperature sensors like K, R, S, and B type thermocouples.

The Profile Controller offers both switching outputs in the form of SSR driver or Triac to drive external single or three-phase Solid-state relays or load contactors and linear analog control outputs in the form of (4-20)mA or (0-5)volt or (0-10)VDC, which can be used to control heater power through Thyristor Power Regulators (for an electrical heating system) or to control the position of a modulating motor valve (for oil or gas-fired heating systems). The analog outputs can be directly connected to Libratherm make single-phase/three-phase SCR based phase angle fired power controllers, which are ideally suitable for both resistive and inductive heating load. Additional 4 relays are also provided for time or temperature-dependent event outputs as per the system requirement. The programmed profile and other parameters are retained in the nonvolatile flash memory in the event of power failure.

To monitor the online temperature profile of the heating system, a serial communication port on the RS485 interface can also be optionally provided, the same can be connected to the computer.
Libratherm offers Microsoft Window-based Software to view the online behavior of the heating system in both graphical and tabular format on the computer screen.

Key Features:

Accepts thermocouple, RTD(Pt-100), Infrared pyrometer.
Both switching and linear PID control outputs.
Servo start from the process temperature.
User programmable 1-10 different patterns of ramp/soak steps.
Retention and auto-execution of program in case of power failure.
Facility to use as PID and ON / OFF controller.
Interface to computer with window based software.

Application:

Heat Treatment Cycle (Tempering, Hardening, Annealing) control
Investment casting
Laboratory / Industrial High Temperature Furnace Control
Laboratory Low Temperature Oven Control

Ordering Information:

Sr. No.	Specifications	Part No.
1	Input from R, S, B t/c with (SSR + 0-5V or (4-20)mA) control output + High or Low and End of Profile Relay outputs. For High Temperature Furnace control (up to 1700 °C).	1703-1
2	Input from K t/c with only SSR control output + High or Low and End of Profile Relay outputs. For Medium Temperature furnace control (up to 1200 °C).	1703-2
3	Input from K t/c with (SSR + 0-5V or (4-20)mA) control output + High or Low and End of Profile Relay outputs. For Medium Temperature furnace control (up to 1200 °C).	1703-3
4	Input from RTD(Pt-100) with (SSR + 0-5V or (4-20)mA) control output + High or Low and End of Profile Relay outputs. For low temperature ovens (up to 400 °C)	1703-4

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Master Slave Ramp Soak PID Temperature Controller PRC-489

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Approx. Price: Rs 11,550 / NumberGet Latest Price

Product Details:

Brand	Libratherm
Model No.	PRC-489 (Part No.: 1706-1)
Size	48 x 96 mm
Control Type	PID/On-Off
Input Type	RTD, Thermocouple
Control output Type	Relay/SSR
Country of Origin	Made in India

PRC-489 – Single input, Single profile of 16 steps Ramp / Soak Programmable PID/On-Off Temperature Controller.
Description:Libratherm offers Microcontroller-based Ramp/Soak Programmable PID Temperature Controller Model PRC-489 which is designed to improve reliability, accuracy, and control for all temperature control applications. It features Ramp and Soak functions (the capability to control the temperature and its rate of change over a predetermined time span). The single pattern of a total of 16 (ramp/soak) steps can be programmed and stored in the memory. It can also be used as single set point control when the ramp/soak profile control is not desired. The controllers are calibrated for K type thermocouple.
Control Outputs: This PID Pressure Controller PRC-489 offers both switching outputs in the form of SSR driver/Triac (AC SSR) for external SSR or external load contactor and analog output in the form of (4-20) mA or (0-5) volt control signal, which can be used to control heater power through external Thyristor Power Regulator. The analog outputs can be directly connected to Libratherm make single-phase/three-phase SCR based phase angle or zero cross over fired power regulators. Additional one/two relays are also provided for time or temperature-dependent event outputs as per the system requirement. The programmed profile and other parameters are retained in the nonvolatile memory in the event of power failure.
Thermocouple Break Protection: In the case of a thermocouple break, the control can be transferred to manual mode to continue the heating cycle and the user can alter the % of control output. The deviation hold feature assures guaranteed ramp. For quick heating from the ambient temperature, the hold feature is disabled in the very 1st ramp. Front Panel LED indicates the start and end of the cycle, the status of heater output, the status of the heating ramp, soaking, or cooling ramp. The unit of temperature measurement can also be selected as °C or °F as desired.
Auto Tracking Feature: In case of power failure during the normal heating cycle, the temperature is likely to drop. This PID Profile Controller has a special feature to auto-track the heating rate on the resumption of power supply. This is the unique feature of the controller and normally not available in other ordinary controllers.
Master-Slave Control Feature: For larger heating systems requiring more than one controller, the master/slave feature facilitates the user to program one controller as a master and others as a slave. The slave controller will follow the program fed in the master controller. This facility allows uniform heating of the bigger jobs. The master-slave configuration is achieved using the RS485 interface. Out of many controllers, anyone controller can be configured as a master controller and others as slaves. Single Master can control a maximum of 30 slave controllers.

Key Features:

Accepts standard type of thermocouple, RTD, Voltage or Current signal.
Control output of Relay / TRAIC / DC pulse / (4-20)mA/ (0-5)Volt.
Servo start from the current process temperature.
1 to 16 programmable ramp/soak steps with rate programming facility.

Application:

Furnace / oven control
PWHT and SR heat treatment cycle

Ordering Information:

Sr. No.	Specifications	Part No.
1.1	Ramp/Soak controller with K type thermocouple input and SSR + 4-20mA control output and High/Low/End of Profile Relay outputs.	1706-1
1.2	Ramp/Soak controller with K type thermocouple input and SSR + 4-20mA control output and High/Low/End of Profile Relay outputs and RS485 interface for Master/Slave control.	1706-2

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High Temperature Ramp Soak PID Controller PRC-309

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Approx. Price: Rs 14,175 / NumberGet Latest Price

Product Details:

Brand	Libratherm
Model No.	PRC-309 (Part No.: 1704-3)
Size	96 x 96 mm
Control Type	PID/On-Off
Input Type	Thermocouple, RTD
Control output Type	Analog (mA/mV), Relay/SSR
Country of Origin	Made in India

PRC-309 – Ramp/Soak Programmable PID Temperature Controller – 1 to 10 profiles – each of 16 steps.
Description:
Libratherm offers Microcontroller based multiple Ramp/Soak Programmable PID Temperature Controller Model PRC-309 which is designed to improve reliability, accuracy, and control for all processing applications. It features Ramp and Soak functions (the capability to control the temperature and its rate of change over a predetermined time span). This PID Pressure Controller PRC-309 offers one to ten different patterns each of 16 (ramp/soak) steps, which can be programmed into the memory with the user-friendly membrane keyboard. Separate displays are provided to monitor simultaneously; the Process temperature, Set temperature, and the Program number. They can also be used as single set point control when the profile control is not desired. They accept user-selectable standard temperature sensors like K, R, S, and B type thermocouples.

Key Features:

Accepts thermocouple, RTD(Pt-100), Infrared pyrometer.
Both switching and linear PID control outputs.
Servo start from the process temperature.
User programmable 1-10 different patterns of ramp/soak steps.
Retention and auto-execution of program in case of power failure.
Facility to use as PID and ON / OFF controller.
Interface to computer with window based software.

Application:

Heat Treatment Cycle (Tempering, Hardening, Annealing) control
Investment casting
Laboratory High Temperature Furnace Control
Laboratory Low Temperature Oven Control
Industrial high temperature furnace control

Ordering Information:

Sr. No.	Specifications	Part No.
1	Input from R, S, B t/c with (SSR + 0-5V or (4-20)mA) control output + High or Low and End of Profile Relay outputs. For High Temperature Furnace control (up to 1700 °C).	1704-1
2	Input from R, S, B t/c with SSR + 0-5V or (4-20)mA) control output + High or Low and End of Profile Relay outputs + RS-485 interface + Supporting windows based PC software. For High Temperature Furnace control (up to 1700 °C).	1704-2
3	Input from K t/c with only SSR control output + High or Low and End of Profile Relay outputs. For Medium Temperature Furnace control (up to 1200 °C).	1704-3
4	Input from K t/c with (SSR + 0-5V or (4-20)mA) control output + High or Low and End of Profile Relay outputs. For Medium Temperature Furnace control (up to 1200 °C).	1704-4
5	Input from K t/c with (SSR + 0-5V or (4-20)mA) control output + High or Low and End of Profile Relay outputs + RS-485 interface + Supporting windows based PC software. For Medium Temperature Furnace control (up to 1200 °C).	1704-5
6	Input from RTD(Pt-100) with (SSR + 0-5V or (4-20)mA) control output + High or Low and End of Profile Relay outputs. For low temperature ovens (up to 400 °C).	1704-6
7	Input from RTD(Pt-100) with (SSR + 0-5V or (4-20)mA) control output + High or Low and End of Profile Relay outputs + RS-485 interface + Supporting windows based PC software. For low temperature ovens (up to 400 °C).	1704-7

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Advanced Ramp Soak PID Temperature Controller PRC-312

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Approx. Price: Rs 18,900 / NumberGet Latest Price

Product Details:

Brand	Libratherm
Model No.	PRC-312 (Part No.: 1701-1)
Size	192 x 96 mm
Control Type	PID/On-Off
Input Type	Thermocouple, RTD
Control output Type	Analog (mA/mV), Relay/SSR
Country of Origin	Made in India

PRC-312 – Programmable PID temperature controller with 10 profiles each of 16 ramp/soak steps.
Description:

Libratherm offers Microcontroller based multiple Ramp/Soak Programmable PID Temperature Controller Model PRC-312, which is designed to improve reliability, accuracy and control for all investment casting applications. It features Ramp and Soak functions (the capability to control the temperature and its rate of change over a predetermined time span). One to ten different patterns each of a total of 16 (ramp/soak) steps can be programmed into the memory using the user-friendly membrane keyboard. Separate displays are provided to monitor simultaneously the process temperature, set temperature, program number, step number, safety temperature, and remaining time. Servo start and auto-tracking facilities are additional useful features available in this model. Multiple displays allow users to view the program status in one glance, without having to press multiple keys. The front panel LED graph shows the status of the current step in progress, whether heating ramp, cooling ramp or soaking step. PRC-312 can also be used as single set point control when the profile control is not required.
This PID Programme Controller PRC-312 offers both switching outputs in the form of SSR or relay to drive external load contactor and also continuous control outputs in the form of (4-20)mA or (0-5)volt etc., which can be used to control heater power through Thyristor Power Regulator (for the electrical heating system).

Key Features:

Accepts standard K type thermocouple.
Control output of DC pulse or (4-20)mA or (0-5)Volt or (0-10)Volt.
Servo start from the process temperature.
Delayed start – built in timer.
Run the program from the desired step.
User programmable 10 different ramp/soak patterns each of 16 steps.
Retention of program in case of power failure.
Automatic program resumption.
Security-lock for unauthorized tampering of the PID and set values.

Application:

Heat Treatment
Investment Casting in Jewelry Industry
Metallurgical / Ceramic research
Furnace / Oven control

Ordering Information:

Sr. No.	Specifications	Part No.
1	Ramp/Soak controller with input from K type thermocouple and with only SSR control output and High/Low/End of Profile Relay outputs operating on 230VAC power supply.	1701-1
2	Ramp/Soak controller with input from K type thermocouple and with SSR + 0-5V control output and High/Low/End of Profile Relay outputs operating on 230VAC power supply.	1701-2
3	Ramp/Soak controller with input from K type thermocouple and with both SSR + 0-5V control output and High/Low/End of Profile Relay outputs operating on 230VAC power supply with RS485 interface and compatible computer software.	1701-3
4	Ramp/Soak controller with input from K type thermocouple and with only SSR control output and High/Low/End of Profile Relay outputs operating on 115VAC power supply.	1701-4
5	Ramp/Soak controller with input from K type thermocouple and with SSR + 0-5V control output and High/Low/End of Profile Relay outputs operating on 115VAC power supply.	1701-5
6	Ramp/Soak controller with input from K type thermocouple and with both SSR + 0-5V control output and High/Low/End of Profile Relay outputs operating on 115VAC power supply with RS485 interface and compatible computer software.	1701-6

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Programmable Temperature Controller

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Approx. Price: Rs 17,500 / PieceGet Latest Price

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Product Details:

Minimum Order Quantity	1 Piece
Model No.	PRC-312
Size	96 x 96 mm
Control Type	PID/On-Off
Input Type	RTD, Thermocouple, Current (mA), Voltage (mV)
Control output Type	Analog (mA/mV), Relay
Brand	Libratherm
Voltage	90-270 VAC/DC

Programmable Ramp Soak PID Temperature Controllers.

Features:

Accepts standard type of thermocouple, RTD, Voltage or Current signal.
Servo starts from the current process temperature.
User programmable 10 different ramp/soak patterns in PRC-969 series.
Retention of the program in case of power failure.
Automatic program resumption.
Software password security lock for unauthorised tampering of the set and tune values.

Applications:

Heat Treatment
Investment casting
Environmental Chambers
Laboratory and Industrial Furnace / Oven control
Laboratory and Industrial high temperature furnace control

Design	Microcontroller based design with 12 bit ADC and 12 bit DAC.
Input	Thermocouple type K (R, S, B type thermocouple or Pt-100 can also be offered against requirement)
Range	0 to 1200 °C for K type thermocouple
Resolution	1 °C Subject to the specified input and range.
Indicating Accuracy	Better than ± 0.1% of the range ( by software linearization of curves).
Display	4 digit 0.5” for Process value, 4 digit 0.5” for set value.
	2 digit 0.3” for current Program number, 2 digit 0.3” for step number.
	4 digit 0.3” for safety temperature and 4 digit 0.3” for the remaining time of the current step.
Tuning	Manual tuning of PID and Hysterisis values.
Control Algorithm	Time proportional switching PID mode. Linear PID mode. On/Off mode with programmable hysteresis. (OUT1).
PID values	Proportional Band (P)= 0.0 to 100.0% of Span, Integral value (I)= 0.00 to 5.00 resets/minute, Derivative value (D) = 0.00 to 5.00 minutes, Cycle Time (CYC)= 2 to 100 seconds, On/Off Hysterisis (HYSt)= 0 to 10°C (When Prb = 0),
Control mode	Single Set Point or Ramp/Soak Profile control – user selectable.
Delayed Start	Internal timer to autostart the heating cycle after the time delay elapses. 0.0 to 99.0 Hour (increment @ 0.5 Hr or 30 minutes).
Set Point	Programmable throughout the range. In single set point control mode, the set point can be changed on line.
Control Outputs	10V DC pulse to drive external SSR OR 4-20mA/0-5V/0-10V – to control through Libratherm Thyristor.
Ramp/Soak Steps	1 to 16 Steps. (No restrictions in programming – a ramp can be followed by a ramp and a soak can be followed by a soak).
Time per Step	1 to 540 minutes per step (max. 9 hours per step).
Number of Profiles	1 to 10 profiles each of 16 ramp/soak steps can be programmed.
Run from desired step facility (rFSn)	This rFSn facility allows users to skip the ramp/soak steps and run the profile from the desired step number. With servo start facility (to start the step from the current furnace temperature).
Memory Backup	Retention of PID and set values in the non-volatile memory in the event of power failure. Auto start from the last setpoint on the resumption of power. No need to restart the program.
Alarm Outputs	Configurable Alarms for High or Low or Deviation. End of Profile Alarm Relay (contacts rated for 5A @ 230VAC).
Serial Communication (Optional)	RS485 on Modbus RTU protocol (in Slave mode). Standard Windows-based PC software is available at extra cost.

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Additional Information:

Item Code: PRC-309
Pay Mode Terms: T/T (Bank Transfer)
Port of Dispatch: Mumbai

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