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ALARM
ACK.
AUTO
Once Alarm is activated, it can be de-activated either by pressing UP key or
when PV falls within the alarm limits.
Once Alarm is activated, it remains activated until manually acknowledged by
UP key.
Once Alarm is activated, User has following three options to de-activate it.
When PV falls within the programmed limits, Alarm will be de-activated
automatically.
ALARM
INHIBIT
Setting this parameter value to ‘YES’, will inhibit (suppress) Alarm activation on
power-up condition. From Power-up, the Alarm system remains disabled until
PV is found with in the limits.
If Alarm activation is desired even under Power-up condition, Set this parameter
value to ‘NO’.
NO
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 hysterisis set by user. (As shown in Fig. 3.1 & 3.2).
Fig: 3.1
HEAT LOGIC/ON-OFF
TIME
0
TEMP ( C)
HYSTERISIS
SP
ON
ON
ON
AMB
O/P
OFF
OFF
Fig: 3.2
TIME
COOL LOGIC / ON OFF
O/P
O/P
0
TEMP ( C)
AMB
HYSTERISIS
ON
ON
ON
SP
OFF
OFF
USER GUIDE
:
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. (Fig. 3.3)
Fig: 3.3
AMB
0
TEMP ( C)
SP
OUT PUT
ON
100 %
ON
100 %
OFF
100 %
PROPORTIONAL BAND (P.BND)
SET BY USER
TIME PROPORTIONAL ACTION
ACTIVE TONE
TIME
Fig: 3.4
AMB
0
TEMP ( C)
SP
OFFSET
after offset adjustment
TIME
3) MANUAL RESET (OFFSET ADJUSTMENT):
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 the value of this parameter equal and opposite to the
existing offset. (As shown in Fig.3.4)
NC
: Normally Close terminal of relay
NO
: Normally Open terminal of relay
OP1
: Output 1
OP2
: Output 2
C.A.
: Control Action
CJC
: Cold junction compensation
CM
: Common terminal of relay
LWC
: Lead wire (Length)
compensation
SP
: Set Point Value(set temp.)
SSR
: Solid State Relay
T.P.
: Time Proportional
T/C
: Thermocouple
ABBREVIATION :
Innovative Instruments
On
Google Play
206, 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 :
Website :
www.innovativeinstruments.co.in
Mfgd by: Innovative Instruments & Controls LLP
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