Advanced Ramp Soak PID Temperature Controller- PRC-312
₹22,500 – ₹38,000
Prices are inclusive of Delivery Charges.
PRC-312 – Programmable PID temperature controller with 10 profiles each of 16 ramp/soak steps.
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). The analog outputs can be directly connected to Libratherm make a single-phase/three-phase SCR phase angle fired power controller which is ideally suitable for both resistive and inductive heating load. Additional 3 relays are also provided for High Alarm, Low Alarm, and End of profile relay. The programmed profile and other parameters are retained in the nonvolatile memory in the event of a power failure and allow automatic execution on power resumption. The delayed start built-in timer allows the user to start the burnout cycle after the desired time gap.
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 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
Technical Specification
| Parameters | Description |
|---|---|
| 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. |
| Supply | 115VAC or 230 VAC ± 10% ( approx.5VA), 50/60Hz. |
| Size | 192 w x 96 h x 160 d mm , Panel cutout : 186 x 92 + 0.5 mm. |
| Enclosure | Metal Powder coated with ABS bazel and polycarbonate front graphic. |
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 |
