USER’S OPERATING MANUAL FOR DIGITAL PROCESS
INDICATOR WITH ALARM
(Models:- PI – 442 / PI – 772 / PI – 882 / PI – 992)

SPECIFICATIONS: –

1. DISPLAY TYPE: 4-Digit 7 segment LED (WHITE)
   

   Model no.	PI-442	PI-882	PI-772	PI-992
   Display height	0.36”	0.56”	0.56”	0.56”

2. INPUT
   

   Sensor Input	TC-J,K,R,S,N,T,B & RTD (PT-100)
   Analog Input	0 – 20mA, 4 – 20mA, 0 – 1VDC, 0 – 5VDC, 0 – 3.3VDC, 0 – 10VDC (Selectable)
   Range	-1999 to 9999
   Resolution	0.001, 0.01, 0.1 & 1°C (Selectable)
   Digital Filter	1 to 10 Selectable

3. OUTPUT: 2 Nos. Relay / SSR (Need to specify)
   a) Relay Output

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

   b) SSR Drive Output

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

4. FUNCTION: Both output work as Alarm
5. ENVIRONMENTAL
   

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

6. POWER SUPPLY
   

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

7. PHYSICAL
   Housing: ABS Plastic.

Model no.	PI-442	PI-882	PI-772	PI-992
Weight (gms.)	130	200	200	240

Over all Dimensions:-

Dim Model	A	B	C	D	E	F	G	H
PI-442	48	48	8	75	43	44	44	9
PI-772	72	72	10	65	66	68	68	9
PI-992	96	96	10	45	89	92	92	9
PI-882	48	96	10	45	43	44	92	9

SAFETY INSTRUCTION :-

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.

ELECTRICAL

• The controller must be wired as per wiring diagram & it must comply with local electrical regulation.
• 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.

OVER ALL DIMENSIONS & PANEL CUT OUT (IN MM)
MODEL:-PI-442 / PI-772 / PI-992

TERMINAL DIAGRAM:

PROGRAMMING:-

USER LIST:-

1. To enter in this mode, Press and hold SET Once.
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	RANGE	DESCRIPTION	DEFAULT
Alarm 1 Set Point		LSPL ~ HSPL	User can change the ‘Alarm 1 Set point’ value using UP/ DOWN keys. Holding the key will change the value at a faster rate. Press SET key to store the desired value and move on to the next parameter.	0
Alarm 1 Band		0 ~ 1000	This parameter will appear only if, In Control list Alarm 1 type(A1.Ty) as Band Selected. User can change the ‘Alarm 1 Band’ value using UP/ DOWN keys. Press SET key to store the desired value and move on to the next parameter. For range limit as per resolution selected Ref. Table No.1(Page No. 4).	0
Alarm 2 Set Point		LSPL ~ HSPL	User can change the ‘Alarm 2 Set point’ value using UP/ DOWN keys. Holding the key will change the value at a faster rate. Press SET key to store the desired value and move on to the next parameter.	0
Alarm 2 Band		-02 ~ 50	This parameter will appear only if, In Control list Alarm 2 type(A2.Ty) as Band Selected. User can change the ‘Alarm 2 Band’ value using UP/ DOWN keys. Press SET key to store the desired value and move on to the next parameter. For range limit as per resolution selected Ref. Table No.1(Page No. 4).	0

CONTROL LIST:-

1. To enter in this mode, Press and hold SET & DOWN 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
ALARM LOCK CODE		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(U.LCk) in Configuration List.		0
ALARM 1 TYPE		Direct acting	Reverse acting	Low
		Low Alarm:- Op1 activates when PV<A1.SP.	Op1 activates when PV>A1.SP.
		High Alarm:- Op1 activates when PV>A1.SP.	Op1 activates when PV<A1.SP.
		Band Alarm:- OP1 activates when PV falls outside the Alarm 1 Band w.r.t. Alarm 1 Sei point in either direction.	OP1 activates when PV falls Inside the Alarm 1 Band w.r.t. Alarm 1 Sei point in either direction.
ALARM 1 LOGIC		If this parameter is set as ‘Direct’, Relay/SSR energizes under Alarm condition & remains De-energized otherwise. ‘Direct’ setting is generally used for Audio/Visual Alarm Output.		Direct
		If this parameter is set as ‘Reverse’, Relay/SSR De-energizes under Alarm condition & remains energized otherwise. ‘Reverse’ setting is generally used for tripping the process under Alarm condition.
ALARM 1 INHIBIT		This parameter can be used to inhibit (suppress) the Alarm 1 activation upon power-up conditions by setting the parameter value to ‘YES”. From Power-up, the Alarm system remains disabled until PV is found with in the limits.		No
		If Alarm 1 activation is desired even under Power-up condition, Set this parameter value to ‘NO’.
ALARM 1 ACK.		Once Alarm 1 is activated, user has following three options to de-activate it. Auto:- When PV falls within the programmed limits, Alarm 1 will be de-activated automatically.		Auto
		Manual:- Once Alarm 1 is activated, it remains activated until manually acknowledged by UP key.
		Both:- Once Alarm 1 is activated, it can be de-activated either by pressing UP key  or when PV falls within the alarm limits.
ALARM 1 Hysterisis		It sets the dead band between ON & OFF switching of the Output. Larger value of hysterisis minimize the number of ON-OFF operation of load. This increases life of actuators like contactors. For range limit as per resolution selected Ref. Table No.1(Page No. 4).		2°C
ALARM 1 SET POINT		If Enabled, User can View & edit the Alarm 1 Set point (A1.SP) & Alarm 1 Band(A1.bd) in USER list.		Enable
		If disabled, User can only View but can not edit Alarm 1 Set Point (A1.SP) & Alarm 1 Band(A1.bd) in USER list.
ALARM 2 TYPE		Direct acting	Reverse acting	Low
		Low Alarm:- Op1 activates when PV<A2.SP.	Op1 activates when PV>A2.SP.
		High Alarm:- Op1 activates when PV>A2.SP.	Op1 activates when PV<A2.SP.
		and Alarm:- P1 activates when PV falls outside the Alarm 1 and w.r.t. Alarm 1 Sei point in either direction.	OP1 activates when PV falls Inside the Alarm 1 Band w.r.t. Alarm 1 Sei point in either direction.
ALARM 2 LOGIC		If this parameter is set as ‘Direct’, Relay/SSR energizes under Alarm condition & remains De-energized otherwise. ‘Direct’ setting is generally used for Audio/Visual Alarm Output.		Direct
		If this parameter is set as ‘Reverse’, Relay/SSR De-energizes under Alarm condition & remains energized otherwise. ‘Reverse’ setting is generally used for tripping the process under Alarm condition.
ALARM 2 INHIBIT		This parameter can be used to inhibit (suppress) the Alarm 1 activation upon power-up conditions by setting the parameter value to ‘YES”. From Power-up, the Alarm system remains disabled until PV is found with in the limits.		No
		If Alarm 1 activation is desired even under Power-up condition, Set this parameter value to ‘NO’.
ALARM 2 ACK.		Once Alarm 2 is activated, user has following three options to de-activate it. Auto:- When PV falls within the programmed limits, Alarm 2 will be de-activated automatically.		Auto
		Manual:- Once Alarm 2 is activated, it remains activated until manually acknowledged by DN key.
		Both:- Once Alarm 2 is activated, it can be de-activated either by pressing DN key  or when PV falls within the alarm limits.
ALARM 2 Hysterisis		It sets the dead band between ON & OFF switching of the Output. Larger value of hysterisis minimize the number of ON-OFF operation of load. This increases life of actuators like contactors. For range limit as per resolution selected Ref. Table No.1(Page No. 4).		2°C
ALARM 2 SET POINT		If Enabled, User can View & edit the Alarm 2 Set point (A2.SP) & Alarm 2 Band(A2.bd) in USER list.		Enable
		If disabled, User can only View but can not edit Alarm 2 Set Point (A2.SP) & Alarm 2 Band(A2.bd) in USER list.

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
CONFIG LOCK CODE		Set this parameter to 15 (Default LOCK CODE) to access Configuration List. User has a choice to set different Lock Code in the range 1 ~ 9999 via USER LOCK CODE in Configuration List.	0
Input Types		‘TC-J’ :- If selected, instrument will accept temperature input from thermocouple J type sensor at rear terminal. Below range it will display ‘LLLL’ message & above range it will display ‘HHHH’.	TC-J
		‘TC-K’ :- If selected, instrument will accept temperature input from thermocouple K type sensor at rear terminal. Below range it will display ‘LLLL’ message & above range it will display ‘HHHH’.
		‘TC-R’ :- If selected, instrument will accept temperature input from thermocouple R type sensor at rear terminal. Below range it will display ‘LLLL’ message & above range it will display ‘HHHH’.
		‘TC-S’ :- If selected, instrument will accept temperature input from thermocouple S type sensor at rear terminal. Below range it will display ‘LLLL’ message & above range it will display ‘HHHH’.
		‘TC-N’ :- If selected, instrument will accept temperature input from thermocouple N type sensor at rear terminal. Below range it will display ‘LLLL’ message & above range it will display ‘HHHH’.
		TC-T’ :- If selected, instrument will accept temperature input from thermocouple N type sensot rear terminal. Below range it will display ‘LLLL’ message & above range it will display HHHH’.
		‘TC-B’ :- If selected, instrument will accept temperature input from thermocouple B type sensor at rear terminal. Below range it will display ‘LLLL’ message & above range it will display ‘HHHH’.
		RTD’ :- If selected, instrument will accept temperature input from PT-100 sensor at rear erminal. Below range it will display ‘LLLL’ message & above range it will display ‘HHHH’.
		‘RTD.1′ :- If selected, instrument will accept temperature input from PT-100 sensor at rear terminal. Below range it will display ‘LLLL’ message & above range it will display ‘HHHH’.
		‘0 – 1′ :- If selected, instrument will accept 0 – 1VDC input at rear terminal. Below 0V it will display ‘LLLL’ message & above 1V it will display ‘HHHH’.
		‘0 – 3.3′ :- If selected, instrument will accept 0 – 3.3VDC input at rear terminal. Below 0V it will display ‘LLLL’ message & above 3.3V it will display ‘HHHH’.
		‘0 – 5′ :- If selected, instrument will accept 0 – 5 VDC input at rear terminal. Below 0V it will display ‘LLLL’ message & above 5V it will display ‘HHHH’.
		‘0 – 10′ :- If selected, instrument will accept 0 – 10VDC input at rear terminal. Below 0V it will display ‘LLLL’ message & Above 10V it will display ‘HHHH’.
		‘0 – 20′ :- If selected, instrument will accept 0 – 20 mA input at rear terminal. Below 0 mA it will display ‘LLLL’ message & Above 20 mA it will display ‘HHHH’.
		‘4 – 20′ :- If selected, instrument will accept 4 – 20mA input at rear terminal. Below 3.8mA it will display ‘LLLL’ message &  Above 20mA it will display ‘HHHH’. If input is less than 3.2mA it will display ‘L.BRK’(Loop Break) message.
RESOLUTION		This parameter will NOT be prompted when input type is selected as Thermocouple (TCJ,K,R & S). When input type selected is RTD then only “0 & 0.0″ resolution format will be available. By this parameter user can select four format of resolution only for analog input, i.e. “0.000, 0.00, 0.0, 0″. For range limit as per resolution selected Ref. Table No.1 (Page No. 6).	0
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. This parameter will only be prompted if Input type is thermocouple or RTD.	º0 C
HIGHERSP LIMIT		Sets the maximum limit for set point adjustment. It can be set from LSPL value to maximum specified range of selected sensor.This parameter will only be prompted if Input type is thermocouple or RTD.	º400 C
ANALOG INPUT LOW VALUE		By this parameter user can define Low scale for input signal. Which can be in between ‘-1999 to Ai.Hi’. For range limit as per resolution selected Ref. Table No.1(Page No. 6).	0
ANALOG INPUT HIGH VALUE		By this parameter user can define HIGH scale for input signal. Which can be in between ‘Ai.Lo to 9999′. For range limit as per resolution selected Ref. Table No.1(Page No. 6).	9999
Analog Input Logic		By this parameter user can select the logic of the Analog Input. ‘DIR’ :- If selected then the value will vary from Ai.Lo to Ai.Hi.	Dir
		‘REV’ :- If selected then the value will vary from Ai.Hi to Ai.Lo.
PROCESS VALUE OFFSET		Function of this parameter is to add/subtract a constant value to the measured PV to obtain Final PV. For range limit as per resolution selected Ref. Table No.1(Page No. 6).	0
INPUT FILTER		Controller is equipped with an adaptive digital filter which is used to filter out any xtraneous pulses on the PV. Filtered PV Value is used for all PV dependent functions. If V signal is fluctuating due to noise, increase the filter time constant value.	4
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

User Calibration List:-

1. To enter in this mode, Press and hold SHIFT 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
User Calib.  Lock		Set this parameter to “7” (Default LOCK CODE) to access User Calibration List.	7
Low Calib- ration		This parameter allows the user to program “Lower Calibration” values other than factory programed values. With the help of Up / Down Key “Low Calibration” can be adjusted (As per selected input apply Low mA/Volt at input terminal).	0
High Calib- ration		This parameter allows the user to program “Higher calibration” values other than factory programed values. With the help of Up / Down Key “High Calibration” can be adjusted (As per selected input apply High mANolt at input terminal)	9999
Factory Default		Yes:- If selected, User calibration will be canceled and instrument will run on factory set calibration values. No:- If selected, there is no effect on User Calibration and instrument will run as per User defined Calibration values.	No

Table 1 :- Range of Different Sensor Types.

Sensor Type	Range	Resolution	Accuracy
Fe-k(J) T/C	0 ~ 760°C	1 °C
Cr-AL(K) T/C	-99 ~ 1300°C	1 °C
(R)T/C	0 ~1700°C	1 °C
(S)T/C	0 ~1700°C	1 °C
TC – N	-99 ~1300°C	1 °C
TC – T	-99 ~ 400°C	1 °C
TC – B	0 ~ 1800°C	1 °C
Pt-100(RTD)	-100 ~ 450°C	1 °C
Pt-100(RTD 0.1)	-100.0 ~ 450.0°C	0.1 °C	± 0.3 °C

Table 2 :- Range as per Resolution.

Resolution	Analog Input Low Value	Analog Input High Value	Process Value Offset	Alarm 1 Band	Alarm 2 Band	ALARM 1 Hysterisis	ALARM 2 Hysterisis
0	-1999 to 9999	-1999 to 9999	-25 to 25	-50 to 50	-50 to 50	1 to 25	1 to 25
0	-199.9 to 999.9	-199.9 to 999.9	-25.0 to 25.0	-50.0 to 50.0	-50.0 to 50.0	0.1 to 25.0	0.1 to 25.0
0	-19.99 to 99.99	-19.99 to 99.99	-15.00 to 25.00	-19.00 to 50.00	-19.00 to 50.00	0.01 to 25.00	0.01 to 25.00
0	-1.999 to 9.999	-1.999 to 9.999	-1.900 to 5.000	-1.900 to 5.000	-1.900 to 5.000	0.001 to 2.500	0.001 to 2.500

Error Message:-

Display Message	Selected Input	Descriptions
“OPEN”	TC-J,K,R,S,N,B or RTD	Open Circuit of Control Sensor
“HHHH”	0 – 20 / 4 – 20 / 0-10	If input is above range it will display “HHHH” message.
“LLLL”	-0 10/	If input is below ‘0’ it will display “LLLL” message.
“LLLL”	4 – 20	If input is below “3.8mA” and above “3.2mA” it will display “LLLL” message.
“L.BRK”	4 – 20	If input is less than “3.2mA” it will display “L.BRK” (Loop Break) message.
“C.E.R.R.”	Any Input Selected	The device is out of calibration and need to be sent to factory for re-calibration.

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.inhttps://www.youtube.com/channel/UCzWGtv0HuHUgZR4KKRyKG1w/videos

Documents / Resources

i-therm PI-442 Digital Process Indicator with Alarm [pdf] User Manual PI-442, PI-772, PI-882, PI-992, PI-442 Digital Process Indicator with Alarm, PI-442 Digital Process Indicator, Digital Process Indicator with Alarm, Digital Process Indicator, Process Indicator, Indicator

References

• User Manual