XMT7100low cost temperature controller

• Resistance temperature Detector: Pt100, Cu50.
• Thermocouple: T , R , J , B , K , E , Wre3-Wre25.
• Auto-tune function can find the best PID parameterautomatically.
• Unit of °C or °F are selectable by parameter.
•  5 kinds of Control modes.
• economical temperature controller

1 Technology parameters.

•  Power supply voltage rating: 85-264VAC/50-60Hz.
• Relay output (NO NC): 250VAC/3A.
• Relay switch life : 1×105 cycles.
• 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"
• Ambient : Temperature of  0~50°C, humidity of0~85RH%.
• Front panel: out Dimension 48mm×24mm×75mm , cut dimension45mm×22mm.

2 Front Panel And Operation.

3 Manual setting the PID parameters.

3.1    Setting initial function value(password0089)

3.1.4 Method of setting parameters. 

3.2 Setting PID Parameter (Password 0036)

3.2.1 Table of PID parameter

3.2.2 PID PARAMETER

P.Proportional band    Smaller P values will makethe both integral and derivative action stronger, Larger the Pnumber means the weaker the action

I.Integral time Decrease integral time, if the controller istaking too long to eliminate the temperature offset. When I=0, thesystem becomes a PD controller.

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

Souf, Overshoot depressant

The value of souf is larger. the Overshoot depressant will besmaller. When the value of souf is too large, the Overshootdepressant 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,ForSSR, thyristor or linear current output, generally 0.5 to 3seconds. For Relay output or in a heating/refrigerating dual outputcontrol system, generally 15 to 40 seconds, because small valuewill cause the frequent on-off action of mechanical switch orfrequent heating/refrigerating switch, and shorten its servicelife. When OT is too small,the action is more,the life of relaywill be short. If ouTY is set 1,OT is set 2~3 normally.If ouTY isset 2,OT is set 5~15 normally .If OUTY is set other selection ,OTis invalid

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

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

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

Note 1: If the setpoint is different, theparameters obtained from auto-tuning are possibly different. Soyou’d better set setpoint to an often-used value or middle valuefirst, and then start auto-tuning. For the ovens with good heatpreservation, the setpoint can be set to the highest applicabletemperature. It is forbidden to change SV during auto tuning.Depending on the system, the auto-tuning time can be from severalseconds to several hours.

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

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

3.2.3 OUTY Control type

3.3 Setting alarm and SV parameters(Password 0001)

3.3.1 Table of Alarm and Control parameter 

3.3.2 Description of alarm and control parameter

SV.Set value of temperature

SV can be set either in here, or by only pressing “∧∨” tochange

4 Wiring graph

Detail drawings: 

XMT7100 low cost temperaturecontroller