i therm AI-5441 Digital Temperature Controller User Manual

i therm AI-5441 Digital Temperature Controller User Manual

USER’S OPERATING MANUAL FOR DIGITAL TEMPERATURE CONTROLLER

SPECIFICATIONS

4-Digit 7 segment LED (Bright White)

STATUS LED’S

OP 1 : Main Control Output

INPUT

Sensor Input : TC:J,K,R,S & RTD: Pt-100
Range : Refer below table

Sampling Time : 125 msec.
Resolution : 1 °C/0.1°C(Only for RTD)
CJC for TC : Built in automatic
LWC for Pt-100 : Built in upto 18E max.
Digital Filter : 1 to 10 Sec.

RELAY OUTPUT

Contact Type : N/O, CM, N/C
Contact Rating : 5A @ 250VAC or 30 VDC
Life Expectancy : > 5,00,000 operations
Isolation : Inherent

SSR DRIVE OUTPUT

Drive Capacity : 12V @ 30mA.
Isolation : Non-Isolated.

FUNCTION

Output 1 : Main Control output
Control Action : ON-OFF/T.P (user selectable)
Control Mode : Heat/Cool (user selectable)
Compliance : —-

ENVIRONMENTAL

Operating Range : 0 ~50°C, 5~90% Rh
Storage Humidity : 95% Rh (Non-condensing)

POWER SUPPLY

Supply Voltage : 90~270VAC, 50/60Hz.
Consumption : 4W Maximum.

PHYSICAL

Housing : ABS Plastic.

SAFETY INSTRUCTION :

This is Is me temperatur applications. It is important to read the manual prior to installing or commissioning of controller. All safety related instructions appearing in this manual must be followed to ensure safety of the operating personnel as well as the instrument.

GENERAL

• The controller must be configured correctly for intended operation. Incorrect configuration could result in damage to the equipment or the process under control or it may lead to personnel injury.
• The controller is generally part of control panel and in such a case the terminals should not remain accessible to the user after installation.

MECHANICAL

• The Controller in its installed state must not come in close proximity to any corrosive/combustible gases, caustic vapors, oils, steam or any other process by- products.

• The Controller in its installed state should not be exposed to carbon dust, salt air, direct sunlight or radiant heat
  Ambient temperature and relative humidity surrounding the controller must not exceed the maximum specified limit for proper operation of the controller.

• The controller in its installed state must be protected against excessive electrostatic or electromagnetic interferences. Ventilation slits provided on the chassis of the instrument are meant for thermal dissipation hence should not be obstructed in the panel.

ELECTRICAL

• The controller must be wired as per wiring diagram & it must comply with local electrical regulation. Care must be taken not to connect AC supplies to low voltage sensor input. Circuit breaker or mains s/w with fuse (275V/1A) must be installed between power supply and supply terminals to protect the controller from any possible damage due to high voltage surges of extended duration.
• Circuit breaker and appropriate fuses must be used for driving high voltage loads to protect the controller from any possible damage due to short circuit on loads.
• To minimize pickup of electrical noise, the wiring for low voltage DC and sensor input must be routed away from high current power cables.
• Where it is impractical to do so, use shielded ground at both ends.
• The controller should not be wired to a 3-Phase supply with unearthed star connection. Under fault condition such supply could rise above 264 VAC which will damage the controller.
• The Electrical noise generated by switching inductive loads might create momentary Fluctuation in display, alarm latch up, data loss or permanent damage to the instrument. To reduce this use snubber circuit across the load.
• It is essential to install a over Temp. Protection device to avoid any failure of heating system. Apart from spoiling the product, this could damage the process being controlled.

CAUTION: To prevent the risk of electrical shock, switch off the power before making/removing any connection or removing the controller from its enclosure.

MECHANICAL INSTALLATION

The label on the controller identifies the serial number, wiring connections and batch number.

OVER ALL DIMENSIONS & PANEL CUT OUT (IN MM)

MODEL:- AI-5441/5741/5941

MODEL : AI – 5841

TABLE : 1

INSTALLATION GUIDELINES

1. Prepare the cut-out with proper dimension as shown in figure.
2. Remove clamp from controller
3. Push the controller through panel cut-out and secure the controller in its place by tightening the side clamp.

ELECTRICAL INSTALLATION

The electrical connection diagram is shown on the controller enclosure as below.
**AI – 5441

AI – 5741

AI – 5941

AI – 5841

**

FRONT PANEL LAYOUT

AI – 5441

AI – 5741

AI – 5941

AI – 5841

FRONT PANEL LAYOUT DESCRIPTION :

Sr.

| NAME|

FUNCTION

---|---|---
1| OP1 LED| Glows when OP1 is ON & flashes when delay time (dly) is in operation (if selected mode is ON-OFF)
2| DISPLAY| It will display: (1) Measured value of selected input or Error massages. (2) SP (Main set point) value in run mode. (3) Parameters Value/code in program mode.
3| SET KEY
| (1) For SP programming. (2) To access Control mode along with DN Key.

(3) To access Configuration mode along with UP key. (4) To scroll the parameter & to store its value.

4| SHIFT KEY
| (1)    To increase/alter parameter value in program mode with Up / Dn Key.

(2)    Press for 3Sec in Programming this will help to go back to previous parameter.

5| UP KEY
| (1) To increase/alter parameter value in program mode. (2) To Enter in configuration mode (with SET key) . (3) To Set SP Offset (with DOWN Key).
6| DOWN KEY
| (1)    To decrease/alter parameter value in program mode.

(2)    To Enter control mode

PROGRAMMING

USER LIST : To access the user list Press & Release SET key once.
(All following selected parameter’s code shown in shaded will be displayed for 1 sec. followed by their values / options)

PARA METER

| DISPLAY| RANGE| DESCRIPTION|

DEFAULT

---|---|---|---|---
CONTROL SET POINT| | LSPL ~ HSPL| User can change SP value using UP/ DOWN keys. Holding the key, will change the value at a faster rate. Press SET key to store the value & move on to next parameter.| 0oC

CONTROL LIST : To enter in this mode, press SET & DOWN key simultaneously for 3 sec. User can then set all the control related parameters as shown below.
(All following selected parameter’s code shown in shaded will be displayed for 1 sec. followed by their values / options)

1 ~ 9999

| Set this parameter to 15 (Default LOCK CODE) to access Control List.

User has a choice to set different Lock Code via USER LOCK CODE in Config. List.

|

0

P.BAND

| | 0.5

to

999.9 °C

| This parameter will appear only if selected control action is T.P. It sets bandwidth over which the output power is adjusted depending upon the error (SV-PV).|

5.0oC

CYCLE TIME| | 1.0

to

100.0 °C

| This parameter will appear only if selected control  action  is T.P.  User can  set  this value based on process being controlled & type of output being selected. For Relay O/P, cycle time should be more than 12 Sec & for SSR O/P, cycle time should be less than 5 Sec.|

16.0 Sec.

CONTROL HYS.| | 1

to 100°C

| This parameter will appear only if selected control action is ON-OFF. It sets the dead band between ON & OFF switching of the Output. Larger value of hysterisis minimize the number of ON-OFF operation of the load.  This increases  life  of  actuators  like Relay but, also produces large errors.|

2°C

DELAY

| | 0

to 500 Sec.

| This parameter will appear only if selected control action is ON-OFF. It sets the main output restart time. If set to ‘0’, O/P will be switched without delay. Also, Delay will be considered in case of every power ON.|

0 Sec.

MANUAL OFF SET| | -25

to 25 oC

| This parameter will appear only if selected C.A is time proportional. (For more details refer User guide.)| 0 o C

CONFIGURATION LIST :

1. To enter in this mode, Press and hold SET & UP key simultaneously for 3 sec.
2. Press UP or DOWN key to scroll between parameter options.
3. Press SET key to store the current parameter & move on to the next parameter.

(All following selected parameter’s code shown in shaded will be displayed for 1 sec. followed by their values / options)

PARA METER

| DISPLAY| DESCRIPTION|

DEFAULT

---|---|---|---
LOCK CODE| | Set this parameter to 15 (Default LOCK CODE) to access Config. List.

User has a choice to set different Lock Code in the range 1 ~ 9999 via USER LOCK CODE in Config. List.

|

0

INPUT TYPE

| | This parameter value is set according to the type of sensor (Thermocouple or RTD Input) connected to the Controller’s Input Terminals.|

tC-J

LOWER SP LIMIT|

| Sets the minimum limit for set point adjustment. It can be set from minimum specified range of selected sensor to HSPL value.| 0 oC
HIGHER SP LIMIT|

| Sets the maximum limit for set point adjustment. It can be set from LSPL value  to  maximum specified range of selected sensor.| 400 oC
PROCESS VALUE OFFSET|

| Function of this parameter is to add/subtract a constant value to the measured PV to obtain Final PV for control applications. This parameter value needs to be  altered  for  one  of  the  following reason :

(i)  To compensate for known thermal gradient.

(ii) To match the display values with another recorder or indicator measuring the same PV.

|

0 oC

adaptive digital filter which  is  used  to  filter  out  any  extraneous pulses on the PV. Filtered PV Value is used for all PV dependent functions. If  PV  signal  is fluctuating due to noise, increase the filter time constant value.| **4
CONTROLMODE ****

****CONTROL LOGIC

| ** User can select between ON-OFF or T.P action algorithm to be adopted for output. (Refer User Guide)| **On-Off
This parameter will appear only if selected control mode is ON-OFF. User can select heating logic in which OP1 will remain ON till PV < SP. (PV increases when output is ON.)| ****HEAT
This parameter will appear only if selected control mode is ON-OFF.User can select cooling logic in which OP1 will remain ON till PV > SP. (PV decreases when output is ON.)
OUTPUT TYPE| ****| User has to set this parameter very carefully in accordance with the output used.(Separate terminals for RELAY & SSR : – Refer  Electrical Installation)Select Relay if LOAD is connected via Contactor. Whenever user selects Relay, Cycle time will automatically set to 16 sec. User can modify cycle time via Control List.| ****RELAY
Select SSR if LOAD is connected via SSR (DC voltage pulses). Whenever user selects SSR , Cycle time will automatically set to 1sec. User can modify cycle time via Control List.
****SET POINT 1|   | If Enabled, User can View & edit the Set point  in USER list.| ****ENABLE
If disabled, User can only View the Set Point  but Can not edit it in USER list.
USER LOCK CODE|
| Default USER LOCK CODE is 15 to access Control & Configuration List.User has a choice to set its own USER LOCK CODE between 1 to 9999, this is to prevent unauthorized access of Control & Configuration List.| 15**

1. ON-OFF ACTION:
   In this mode, Output (Relay/SSR) remains ON till actual temperature reaches to Set point value. On reaching SP, output turns OFF & remains OFF till actual temperature drops down (in heat logic) or raises (in cool logic) equal to hysteresis set by user. (As shown in Fig. 3.1 & 3.2).
   TEMP ( C)
   
   HEAT LOGIC/ON-OFF TIME
   Fig: 3.2
   TEMP ( C)
   
   COOL LOGIC / ON OFF TIME
   ** Fig: 3.1**

2. TIME PROPORTIONAL ACTION:
   In this mode, ON & OFF time of output (Relay/SSR)varies proportionally in every cycle (cycle time settable by user) depending on the deviation of PV w.r.t. SP. This action Starts/continues only when PV enters or is within the band. (As shown in Fig : 3.3)
   

3. MANUAL RESET (OFFSET ADJUSTMENT):

4. In some application, after adopting-Time proportionating action, system may stabilize at particular temperature over a period of time which can be different than the set value. This steady state (error) offset can be eliminated by setting this value equal and opposite to the existing offset. (As shown in Fig : 3.4)
   

Mfgd by: Innovative Instruments & Controls LLP

338, New Sonal Link Service Industrial Premises Co-op Society Ltd, Building No.2, Link Road, Malad (W), Mumbai – 400064.
Tel: 022-66939916/17/18;
E-mail : sales@itherm.co.in
Website : www.itherm.co.in

References

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