Ramp Soak Profile Controller

Model Wise Description:

Model          Product Description

PRC-300       Single input Single profile of 16 steps Ramp / Soak Programmable  

                     PID Temperature Controller (Basic Model)

PRC-309       Single input 10 profiles - each of 16 steps Ramp / Soak Programmable 

                     PID Temperature Controller (Advance model)

PRC-309-2   User selectable two inputs - K and S  or K and R T/C (or any other pair to be specified)

                     with 10 profiles  - each of 16 steps Ramp / Soak Programmable  Temperature PID Controller

PRC-310       Single input 10 profiles - each of 16 steps Ramp / Soak Programmable  PID Temperature Controller

                     upto 999 oC/oF  with Multiple Display (Advance model)

Technical Specifications:

Design

Microprocessor based  with 12 bit ADC and 8 bit DAC

Input

Thermocouple type J, K, R, S, B, C, D or RTD(Pt-100)/2 or 3-wire, (any one to be specified).

Two fixed inputs

Any two fixed inputs of same or two different types – back panel switch selectable. (facility available in PRC-309-2)

Range

Subject to the full range of the specified input.

Resolution

0.1 / 1^oC  Subject to the specified input and range.

Indicating Accuracy

Better than ± 0.1% of the range ( by software linearization of curves)

Display (PRC-300)

4 digit 0.5� for process value.

4 digit 0.3� for set value and other parameters.

Display (PRC-309)

4 digit 0.5� for process value.

4 digit 0.3� for set value and other parameters.

2 digit 0.3� for Program number and other codes.

Display (PRC-310)

3 digit 0.5� for Process value, 3 digit 0.5� for set value (Max. display temperature = 999 ^oC)

2 digit 0.5� for current Program number,  2 digit 0.5� for step number

3 digit 0.5� for safety temperature and 3 digit 0.5� for remaining time of the current step.

Tuning

Auto / Manual tuning of PID values.

Control Algorithm

PID mode for heating control  - (reverse action)

On/Off mode with programmable hysteresis.

Reverse  action – as the temperature increases the control output decreases (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 50 oC,

Soft Start (rt) and Power Limit  (PL) 

Built in power on soft start (rt) for analog output = 1 to 99 seconds.

Power Limit to restrict the analog control output = 1 to 100 %.

Control Outputs

a)      DC pulses to drive external SSR,

b)       (4-20)mA, RL max = 300 Ohms.  or

c)        (0-5)VDC, RL min = 10K ohms.

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).

Set Temperature

Programmable for each steps in the full range of the specified input

Time per Step in PRC-300,310

1 to 540 mins. (9 Hr. per step). Two or more steps can be combined for longer time duration.

Time per Step in PRC-309

1 to 540 mins. (9 Hrs. per step) Or

1 minute to 100 hours (Two or more steps can be combined for longer time duration).

Program Hold Facility

Manual  Hold or Auto Hold (Hold back feature for guaranteed Ramp/Soak facility)

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).

Serial Communication (Optional Feature)

Optically isolated 2 wire RS485 on Modbus ASCII protocol.         (in Slave mode).

Supply

90 to 240 VAC ± 10% ( approx. 5VA), 50/60Hz.

Sizes

96 x 96 x 160 mm , (PRC-300 and PRC-309)

192 x 96 x 160 mm (PRC-310)

Panel cut out

92 x 92 mm  and 186 x 92 mm +/- 0.5 mm

Enclosure

Metal Powder coated with ABS bazzel and polycarbonate front.

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