CL309 Pid Fuzzy Logic Temperature Controller Original Overtemperature Alarm Controller For Refrigerator

Small integrated intelligent temperature controller, used in (compressor)heating or cooling control series.
High-brightness red LED display, abnormal temperature sensor self-diagnosis,temperature setting range limit.
Variety of alarm mode selection, heating 1 cooling mode free switch.

Technical Parameters
1. Working power: 220VAC 50/60HZ.
2. Temperature sensor: 50K NTC.
3. Temperature display range: -40.0'C to +120"C, resolution: 0.1C (-9.9-99.9'C).
4. Temperature control range: -20.0'C to +110'C, resolution: +1C.
5. Working environment: -10'C~ + 60'C, relative humidity: 20% ~ 85%
(without condensation).
6. Master control relay contact capacity: normally open contact 30A
(recommended load: cooling 1, heating 2000W).
7. Auxiliary relay contact capacity: normally open contact 3A.
8. Dimensions:76*36* 82mm Installation Opening:71*30mm

Features

On/Off Control
An on-off controller is the simplest form of temperature control device. The output from the device is either on or off with no middle state.
An on-off controller will switch the output only when the temperature crosses the setpoint. For heating control,the output is on when the temperature is below the setpoint, and off above setpoint. Since the temperature crosses the setpoint to change the output state,the process temperature will be cycling continually, going from below setpoint to above,and back below. in cases where this cycling occurs rapidly, and to prevent damage to contractors and valves, an on-off differential or"hysteresis"is added to the controller operations.
His differential requires that the temperature exceed setpoint by a certain amount before the output will turn off or on again.On-off differential prevents the output from"chattering"or making fast,continual switches if the cycling above and below the setpoint occurs very rapidly. On-off control is usually used where a precise
control is not necessary,in systems which cannot handle having the energy turned on and off frequently, where the mass of the system is so great that temperatures change extremely slowly, or for a temperature alarm. One special type of on-off control used for alarm is a limit controller. This controller uses a latching relay, which must be manually reset and is used to shut down a process when a certain temperature is reached.

Proportional Control
Proportional controls are designed to eliminate the cycling associated with on-off control. A proportional controller decreases the average power supplied to the heater as the temperature approaches setpoint. This has the effect of slowing down the heater so that it will not overshoot the setpoint, but will approach the setpoint and maintain a stable temperature. This proportioning action can be accomplished by turning the output on and off for short time intervals. This "time proportioning" varies the ratio of "on" time to"off" time to control the temperature. The proportioning action occurs within a "proportional band"around the setpoint temperature. Outside this band,the controller functions as an on-off unit, with the output either fully on (below
the band) or fully off (above the band).However, within the band, the output is turned on and off in the ratio of the measurement difference from the setpoint. At the setpoint (the midpoint of the proportional band)the output on:off ratio is 1:1; that is,the on-time and off-time are equal. If the temperature is further from the setpoint the on-and off-times vary in proportion to the temperature difference if the temperature is below setpoint, the output will be on longer; if the temperature is too high, the output will be off longer.

Sichuan VACORDA Instruments Manufacturing Co., Ltd.is a professional production-manufacturing enterprise specialized in designing, producing and marketing of instruments and apparatuses. Our company has been established for 23 years since 1997 to grow up to be a team of high-quality, united, hard-working and truth-seeking characters. Solid foundation has been established.

Our company has got the ISO9001: 2000 international quality system certification in 2005, Import and export trading right in 2012, total 12 patents till 2016, the title of  “national high-tech enterprise”  and CE certificate for three categories product in 2014. Our company has owned trade marks as “vacorda”. At the same time, our company is preparing for more certificates for foreign market, such as IECEX, API, UL and so on, to lay a foundation for further international market.

Our Service
1. 24-hour Online Service
Please feel free to contact us. Our sales team will provide you with 24 hours better pre-sale.

2. Competitive Price
All of our products are supplied directly from factory. So the price is very competitive.

3. Warranty
All products have a one-year warranty.

4. OEM/ODM
With 15-year experiences in this field, we can provide customers with professional suggestion to promote common development.

5. Distributor
The company now recruit distributor and agent all over the world. Prompt delivery and professional after-sales service are our priority, which makes us to be your reliable partner.

Q1: Can I place sample order first?
A1: Yes, we will quote you different prices for small, medium and large qty. You can order with different price for different qty.

Q2: How could I pay them?
A2: PayPal, Western Union and T/T are preferred, so just tell us which is easier to you. Then we will send you our bank details. Or as your requirements.

Q3: How to place the order?
A3: Please send us your purchase order by e-mail, Trade Manager or Skype or you can ask us to send you a Proforma Invoice for your order.

Q4: How long can I get my order?
A4: For samples, we will finish production and ship within 7~10 working days. For bulk orders, usually 15~20 working days and depends on your design.

Q5: How to send us the products?
A5: We usually use DHL, UPS, FedEX to ship samples. For bulk orders, we support shipping by air or by sea.

Q6: Can you customize according to our designs and put our logo on the products?
A6: Yes, we support both standard and customized products and can put your logo on the products. Our experienced R&D team will support technical questions. ODM/OEM is welcome.