Silicon controlled output Temperature Controller MC18 - MC18

Silicon controlled output Temperature Controller MC18

1 Technology parameters

• Power supply voltage rating: AC/DC85-260V(Can be customized).
• Relay output (NO): AC220V/3A
• Relay switch life : 1×10⁵cycles
• SSR Voltage : 8V outline,Short line current : 30MA
• Measurement accuracy : 0.2%FS
• There are 4 LED indicator lamp on the front panel
• Out range shown:"EEEE"
• Digit display dimension: 0.39(Red).
• Supreme power:200W
• current:<1am
• Ambient : Temperature of 0~50°C, humidity of 0~85RH%
• Outline Dimension: 48mm; 24mm; 78(mm)
  Panel Cutout Dimension: 42mm; 22(mm).

2 Front Panel And Operation

3 Manual setting the PID parameters

3.1 Setting initial function value

3.2 Method of setting parameters

3.3 PID PARAMETER

P;Proportional band Smaller P values will make the both integral and derivative action stronger, Larger the P number means the weaker the action

I;Integral time Decrease integral time, if the controller is taking too long to eliminate the temperature offset. When I=0, the system becomes a PD controller.

D;“d”. Derivative time Derivative action contributes the output power based on the rate of temperature change

Souf, Overshoot depressant

The value of souf is larger; the Overshoot depressant will be smaller. When the value of souf is too large, the Overshoot depressant will be not enough. When the value of souf is smaller , the Overshoot depressant will be stronger

OT,Control period

OT Small value can improve control accuracy,For SSR, thyristor or linear current output, generally 0.5 to 3 seconds. For Relay output or in a heating/refrigerating dual output control system, generally 15 to 40 seconds, because small value will cause the frequent on-off action of mechanical switch or frequent heating/refrigerating switch, and shorten its service life. When OT is too small,the action is more,the life of relay will be short. If ouTY is set 1,OT is set 2~3 normally;If ouTY is set 2,OT is set 5~15 normally .If OUTY is set other selection ,OT is invalid

Flit; PV input filter. 0 No filter,1little, 2 middle, 3 strong. The value of Flit will determine the ability of filtering noise.

When a large value is set, the measurement input is stabilized but the response speed is slow.

Auto tuning; If the result of temperature control is not satisfy , you can start Auto tuning. Press > for more than 3 seconds to active the auto-tuning process. After 2 cycles of on-off action, the instrument will obtain the values of PID control parameters. During auto tuning, “At” will flash at lower display window and the instrument executes on-off control. If you want to escape from auto tuning status, press > and hold for about 3 seconds until the "At" parameter appears again.

Note 1: If the setpoint is different, the parameters obtained from auto-tuning are possibly 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 to the highest applicable temperature. It is forbidden to change SV during auto tuning. Depending on the system, the auto-tuning time can be from several seconds to several hours.

Note 2: Parameter HY (on-off differential, control hysteresis) has influence on the accuracy of auto-tuning. Generally, the smaller the value of HY, the higher the precision of auto tuning. But the value of HY parameter should be large enough to prevent the instrument from error action around setpoint due to the oscillation of input. HY is recommended to be 2.0.

Note 3: In a heating/refrigerating dual output system, auto tuning should be executed at the main output (OUTP).

4. Wiring graph

Details photo of temperature controller: