High Accuracy PID Temperature Controller – PID-967

High Accuracy PID Temperature Controller – PID-967

Product Description:

PID-967 – 5 digit Temperature and Process PID Controller with single Ramp/Soak feature.
Configuration : (1AI + 2AO + 4DO + 1SO)
Size (mm) : 96 x 96 x 120

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 precise process control. Unlike the On/Off type of oscillatory control, PID control action gives smooth and steady-state control. This High-Temperature PID Controller offers all the useful features which are required to control the complex system.

This PID Process Controller 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, electromechanical relay, and/or linear analog output of 4-20mA, 0-5V, or 0-10VDC to drive external Thyristor Power Regulators or actuator coupled control valves.

Key Features :

Microcontroller based Design
5 digit display with resolution of 0.1 °C 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
RS-485 digital interface for PC connectivity

Item	Microcontroller based 5 digit PID Temperature / Process controller
Input -U (Universal)	Single Analog Input - RTD(Pt-100)/ 2 or 3 wire and Thermocouple (type J,K,R,S,B,T), 0-10V and 4-20 mA (i.e. Maximum 8 user selectable inputs using keyboard and DIP switch on the back panel)
Range	Full +ve range of the selected input (please refer to the input and range selection table)
Decimal Point	Programmable for voltage and current inputs.(1.0 0.1,0.01)
Resolution	1 °C /0.1 °C for thermocouples and 0.1oC for Pt-100. For V and mA inputs the display resolution is subject to the required range. For V and mA input the position of the decimal point can be selected.
Sampling rate / Display rate	The input is read @40mS / the display is updated @1 second. The control loop is also executed @ 40 mS.
Indicating Accuracy	+/- 1 °C or +/-0.1 °C for Thermocouple throughout the range and +/- 0.1 °C for Pt-100 for (4-20)mA or (0-10)V - absolute to the linear input signal
Burn Out Detection	In the event of Input being open or short - the analog output can be programmed to go up scale or down scale and Digital Output like relay can be programmed to remain ON or OFF.
One Ramp / Soak	To Gradually increase the process value - Ramp rate : rAmp = 0.0 to 100.0 °C/min or 0 to 100 °C/min To Hold the controlled process value for required time, Soak time: St = 0 to 999 minutes.
Display	5 digit 0.5" Red 7-segment display for process variable. 5 digit 0.5" Green 7-segment display for set value and PID parameters
Output Indications	Front Panel LED indications for Control Output, Alarms, Control and A/M status and serial interface etc.
Control Algorithm	PID or ON/OFF selectable (when specified for switching output). Direct action (cool) or Reverse action (heat) - User programmable. Reverse Action is considered as Heat output - where control output decreases as the error (SV-PV) is less positive and vice versa. Direct Action is considered as Cool output - where control output increases as the error (PV-SV) is more positive and vice versa.
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, Hysterisis = 0 to 50 counts, Cycle Time = 2 to 100 seconds.
Settings	Using front panel feather touch (metal dome) 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)	Switching Outputs - DC pulse (0 to 10VDC@25mA) for external SSRs and Relay or Triac (AC SSR) (rated for 5A @230VAC) for external contactor. (PID or ON/OFF action - user selectable) or
Control Outputs (Analog)	Analog Outputs (4-20)mA (RL max = 300 Ohms) or 0-5VDC (RL min = 10KOhms)
Alarm Outputs	2 to 4 extra Relay Outputs with programmable hysteresis for High or Low Alarms. (relay contacts rated for 5A @230VAC) - Configurable for High, Low, Deviation and OFF state or as per desired event. (C and NO contacts are available to the user for each relay)
Serial Communication	Optically isolated 2 wire RS485 on Modbus RTU protocol. (in Slave mode with programmable modbus address).
Supply	230VAC +/- 20%, 50/60 Hz.
Size	96 x 96 x 120 mm.
Panel Cutout	92 x 92 mm +/- 0.5 mm.
Enclosure	ABS plastic with polycarbonate front graphic.

Code	Input	Range
A1	Factory set to 8 universal inputs marked (*) below : A2,A3,A4,A5,A6,A7,A8,A9	Subject to input type
A2	J type : Fe/Con thermocouple (*)	0 to 760 °C / 0.0 to 760.0 °C
A3	K type : Cr/Al thermocouple (*)	0 to 1372 °C / 0.0 to 1372.0 °C
A4	R type : Pt. Rh13%/Pt thermocouple (*)	0 to 1768 °C / 0.0 to 1768.0 °C
A5	S type : Pt Rh10%/Pt - thermocouple (*)	0 to 1768 °C / 0.0 to 1768.0 °C
A6	B type : Pt Rh 30% / PtRh - 6%	400 to 1820oC /400.0 to 1820.0 °C
A7	T type : Cu/Con thermocouple (*)	0 to 400 °C / 0.0 to 400.0 °
A8	Pt-100 (Alpha = 0.00385) DIN 43760 (*)	-100.0 to 400.0 C
A9	4-20mA (*) with selection of DP	-10000 to +10000 units
A10	0-10VDC (*) with selection of DP For A9 and A10 - DP is programmable	-10000 to +10000 units

Sr. No.	Specifications	Part No.
1.1	Input : J,K,Pt-100,4-20mA + SSR control output + 2 relay output	1515-1
1.2	Input : J,K,Pt-100,4-20mA + 4-20mA control output + 2 Relay output	1515-2
1.3	Input : J,K,Pt-100,4-20mA + SSR + 4-20mA control output + 2 Relay output + RS-485 interface	1515-3
1.4	Input : J,K,Pt-100,4-20mA + SSR + 4-20mA control output + 4-20mA Retransmission + 2 Relay output	1515-4
1.5	Input : R,S,B + SSR control output + 2 relay output	1515-5
1.6	Input : R,S,B + 4-20mA control output + 2 Relay output	1515-6
1.7	Input : R,S,B + 1 SSR + 4-20mA control output + 2 Relay output + RS-485 interface	1515-7
1.8	Input : R,S,B + SSR + 4-20mA control output + 4-20mA Retransmission + 2 Relay output	1515-8

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