Temperature controllerai208v76

Yudian (H.K.) Automation Technology Co. Ltd.
Website: http://www.yudian.us http://www.yudian.com.hk
Email: sales@yudian.com.hk
Tel: +852-2770 8785 Fax: +852-2770 8796
ARTIFICIAL INTELLIGENCE
TEMPERATURE CONTROLLER
AI-208 (V7.6)
User Manual

Tel: +852-2770 8785 Fax: +852-2770 8796
I. Model Code Symbol
The type of AI-208 is made up of 4 parts:
AI-208 A G L2
Part 1 (Series) Part 2 (Size) Part 3 (Oupt) Part 4 (AUX)
1. (Part 1) Model Series
AI-208, standard temperature controller , 0.3%FS±1℃ accuracy.
Multiple thermocouples and RTDs are selectable
Suitable for 0~999℃ application. Maximum support two alarms contact output
Universal voltage input (100~240VAC)
2. (Part 2) Front panel dimension
Size
Front Panel
width×height
Cut Out
width×height
Depth Behind Mounting Surface
A 96×96mm 92×92mm 100mm
B 160×80mm 152×76mm 100mm
D 72×72mm 68×68mm 95mm
D2 48×48mm 45×45mm 95mm
E 48×96mm 45×92mm 100mm
F 96×48mm 92×45mm 100mm

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3. (Part 3 and 4) indicate the module installed in OUTP and AUX sockets.
Allowed modules in each socket are as below:
Allowed Type
Module Socket
N L L1 L5 G
3. OUTP (main output) √ √
4. AUX (Auxiliary output) √ √ √
N (or none) no module installed
L Relay contact output module (Capacity: 5A/250VAC, normal open)
L1 Relay contact output module (Capacity: 2A/250VAC, normal open/ normal close)
L5 Dual relay output module Output module (Capacity: 2A/250VAC, normal open, support AU1 and
AU2 alarm output)
G SSR voltage output module (30mA/5VDC)
II. TECHNICAL SPECIFICATION
1. Input type :
Thermocouple: K, E, J, N
Resistance temperature detector: Pt100
2. Instrument Input range :
K, E, J, N : (0~+999)℃ ; Pt100: (0~+800)℃
3. Measurement accuracy : 0.3%FS±1℃
4. Temperature display resolution : 0 or 0.0 (0.0 just for 0~99.9 display)
5. Control mode:
On-off control mode, or
PID control with the function of parameter auto tuning.
6. Alarm function: High limit alarm, Lower limit alarm, Deviation High Alarm; providing the function of
alarm blocking at the beginning of power on.
7. Power supply voltage rating: 100-240VAC, -15%, +10% / 50-60Hz.
8. Power consumption: ≤2W
9. Ambient temperature: -10~+60℃, Humidity: 0~90RH%

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III. FRONT PANEL AND OPERATION
① Process Value(PV), or parameter code
② Set Value(SV), alarming code, or value of a parameter
③ Setup key, for accessing parameter table, and confirming change.
④ Data shift key, also for activating auto turning
⑤ Data decrease key
⑥ Data increase key
⑦ Status display LED,
OP1, AU1, AU2, and RUN indicate I/O operation of the
corresponding module.
Basal display status:
When power on, will shows the process value (PV) and the set point (SV). lf the input signal is out of the measurable range (for example,
the thermocouple or RTD circuit is break, or input specification sets wrong). Instrument will alternately display “orA”, and limit alarm of PV,
moreover, instrument will automatically stop the output.
IV. OPERATION DESCRIPTION
● Set Value Setting:
In basal display status, if the parameter lock “Loc” isn't locked, we can set setpoint (SV) by pressing 、 or . Press
key to decrease the value, key to increase the value, and key to move to the digit expected to modify. Keep
pressing or , the speed of decreasing or inscreasing value get quick. The range of setpoint is between the parameter
SPH. The default range is 0 to 400.
● Parameter Setting:
In basal display status, press and hold for about 2 seconds can access Field Parameter Table. Pressing can go to the
next parameter; if parameter have not locked, pressing 、 or can modify a parameter. Press and hold can
return to the preceding parameter. Press (don't release) and then press key simultaneously can escape from the
parameter table. The instrument will escape auomatically from the parameter table if no key is pressed within 30 seconds. Setting
Loc=808 and then press can access System Parameter Table.
● AI artificial intelligence control and auto tuning
When AI artificial intelligence control method is chosen (CrL=AI), the PID parameters can be obtained by running auto-tuning. In
basal display status, press for 2 seconds, the “At” parameter will appear. Press to change the value of “At” from “oFF”
to “on”, then press to active the auto-tuning process. During auto tuning, the instrument executes on-off control. After 2-3
times of on-off action, the instrument will obtain the optimal control parameter value. If you want to escape from auto tuning status,
press and hold the key for about 2 seconds until the "At" parameter appear again. Change “At” from “on” to “oFF”, press to
confirm, then the auto tuning process will be cancelled.
Note 1: If the setpoint is different, the parameters obtained from auto-tuning are possible different. So you’d better set setpoint to an
often-used value or middle value first, and then start auto-tuning. For the ovens with good heat preservation, the setpoint can
be set at the highest applicable temperature. Depending on the system, the auto-tuning time can be from several seconds to
several hours.
Note 2: Parameter Ctl (on-off differential, control hysteresis) has influence on the accuracy of auto-tuning. Generally, the smaller the
value of Ctl, the higher the precision of auto tuning. But Ctl parameter value should be large enough to prevent the instrument
from error action around setpoint due to the oscillation of input. Ctl is recommended to be 2.0.
Note 3: AI series instrument has the function of self-learning. It is able to learn the process while working. The control effect at the
first run after auto tuning is probably not perfect, but excellent control result will be obtained after a period of time because of
self-learning.

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V. PARAMETER AND SETTING
Field parameter table (Press and hold for 2 seconds to access)
Code Name Description Setting Range
HIA High limit alarm
Alarm on when PV (Process Value) >HIA;
alarm off when PV<HIA-AHY
0～999℃
LoA Lower limit alarm
Alarm on when PV (Process Value) < LoA;
alarm off when PV > LoA+AHY
0～999℃
HdA
Deviation high
alarm
Alarm on when PV-SV>HdA;
alarm off when PV-SV<HdA-AHY
0～999℃
Loc Parameter lock
Loc=0~1: Allowed to modify parameters HIA, LoA, HdA and SV.
Loc=2~3: Allowed to modify parameters HIA, LoA, HdA. But cannot
change SV.
Loc=4~255: NOT allowed to modify any parameters and SV.
Loc=808, Set to 808 and press , allowed modify all parameters.
0～255
AHY Hysteresis
Avoid frequent alarm on-off action because of the fluctuation of PV,
usually sets to AHY=2
0~200
AOP
Alarm output
assignment
Alarm
Output to
HdA
(x100)
LoA
(x10)
HIA
(x1)
None 0 0 0
AU1 1 1 1
AU2 2 2 2
eg: AOP=201 means HdA have alarm action from AU2, LoA, no alarm
action , HIA alarm action output from AU1.
0~444
CrL Control mode
onF : On-off control, When PV=SV, Output stop. When
PV<SV-CHY, start output.
AI : AI PID control, high precision and the output time proportion
can set by parameter Ctl
Act Acting method
rE: Reverse acting. Increase in measured variable causes a decrease
in the output, such as heating control.
dr: Direct acting. Increase in measured variable causes an increase in
the output, such as refrigerating control.
rEb: Reverse acting with low limit alarm and deviation low alarm
blocking at the beginning of power on.
drb: Direct acting with high limit alarm and deviation high alarm
blocking at the beginning of power on.
rE , dr ,
rEb, drb
P Proportion band Proportion band in PID with unit ℃or ℉ 1~999
I Time of integral Time of integral in PID. No integral effect when I=0 0~999 Sec
d
Time of
derivative
Time of derivative in PID. No derivative effect when d=0 0~999 Sec
Ctl Control period
Small value can improve control accuracy.
For SSR output, generally 0.5 to 3 seconds.
For Relay output, generally 15 to 40 seconds, because small value will
cause the frequent On-Off of mechanical switch and shorten its service
life. Ctl is recommended to be 1/4 – 1/10 of derivative time. When
control under on-off control, Ctl use as restart delay time after off, for
protect compressor application.
0.5-300 SEC
CHY
Control
hysteresis
CHY is used for ON-OFF Control.
PV > SV, Output turns OFF;
PV<SV-CHY, Output turns ON.
0~200

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InP
Input
specification
Sn Input spec. Sn Input spec.
0 K 1-3 Spare
4 E 5 J
6 Spare 7 N
8-20 Spare 21 Pt100
0～21
dPt Resolution 0 or 0.0 selectable, 0.0 just for 0~99.9 ℃ / ℉ display
Scb Input shift
Scb is used to make input shift to compensate the error produced by
sensor or input signal.
PV after compensation= PV before compensation + Scb.
-99～+99℃
FIL PV input filter
The value of FIL will determine the ability of filtering noise.
When a large value is set, the measurement input is stabilized but the
response speed is slow. Generally, it can be set to 1 to 3.
If great interference exists, then you can increase parameter “FIL”
gradually to make momentary fluctuation of measured value less than
2 to 5.
When the instrument is being metrological verified, “FIL” s can be set
to 0 or 1 to shorten the response time.
0～40
Fru
Selection of
power frequency
and temperature
scale
50C: 50Hz, ℃
50F: 50Hz, ℉
60C: 60Hz, ℃
60F: 60Hz, ℉
SPH Upper limit of SV
Maximum value that SV allowed to be. When SPH=400, the SV range
will 0~400℃
0～999℃
VI. INSTRUMENT INSTALLATION AND WIRING
Wiring graph for instruments with dimension A, B, E or F
Note: The graph suits for
upright instruments with
dimension A or E
For instruments with
dimension B or F size, just
clockwise rotate the graph
90 degree.
1
2
3
4
5
6
7
8
9
10
100-240VAC~
+
Alarm Output
N/O
COM
+
Main Output
AUX
AU2
AU1
COMCOM
N/ON/O
N/ON/C
OUTP

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Wiring graph for D2 dimension（48X48mm）instruments：
Wiring graph for D dimension (72mm X 72mm) instruments

Temperature controllerai208v76

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