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High Temperature Ramp Soak PID Controller – PRC-309

Bar Graph Indicator Model BGI-144

Process Control Instruments

High Temperature Ramp Soak PID Controller – PRC-309

Product Description :

PRC-309Ramp/Soak Programmable PID Temperature Controller – 1 to 10 profiles – each of 16 steps.

Technical Specification

DesignMicrocontroller based with 12 bit ADC and dual 12 bit DAC
InputThermocouple type K, R, S, B, (user selectable) or RTD (Pt-100)
RangeSubject to the full range of the specified input.
Resolution1°C Subject to the specified input type and range.
Indicating AccuracyBetter than ± 0.1% of the range ( by software linearization of curves)
Display4 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.
TuningManual tuning of PID values.
Control AlgorithmPID mode for heating control,
On/Off mode with programmable hysteresis.
PID valuesProportional 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 Hysteresis (HYSt)= 0 to 50°C,
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 %.
E.G. If control output is 0 to 5VDC and PL=80%, then control output range will be restricted to 0 to 4Volt (80% of 5Volt).
Power Limit to restrict the analog control output = 1 to 100 %.
Control Outputsa) DC pulses to drive external SSR,
b) (4-20)mA, RL max = 300 Ohms. Or
c) (0-5)VDC / (0-10)VDC, RL min = 10K ohms.
d) (4-20mA) retransmission output proportional to temperature (Optional)
No. of Ramp/Soak Profiles1 to 10 profiles each of max. 16 steps.
Ramp/Soak Steps1 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 TemperatureProgrammable for each steps in the full range of the specified input.
In single set point or profile control mode.
Time per each Ramp/Soak Step1 to 540 mins. (9 Hrs. per step) Or
1 minute to 100 hours (Two or more steps can be combined for longer time duration).
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 number.
With servo start facility (to start the step from the current furnace temperature)
the rate of heating/cooling can be kept same.
Program Hold FacilityManual Hold or Auto Hold (Hold back feature for guaranteed Ramp/Soak facility) dHLd= 0 to 50 oC. (Effective from 2nd step)
Manual hold when dHLd=0.
Front Panel LEDsTo display the status of control output, Alarms and Ramp/Soak status.
Memory BackupRetention of PID and set values in the non-volatile memory in the event of power failure and auto resumption of heating cycle.
Alarm OutputsHigh 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 (in Slave mode with programmable slave ID)
Supply90-240VAC ( approx. 5VA), 50/60Hz.
Size96 x 96 x 120 mm
Panel cut out92 x 92 mm +/- 0.5 mm
EnclosureABS plastic enclosure with ABS bazzel and polycarbonate front.