Microcomputer time and temperature programmable controller

1、 Introduction

The microcomputer time and temperature programmable controller is an intelligent instrument that controls the heating time and temperature of the muffle furnace during coal quality testing and analysis. It can strictly follow the relevant provisions of the national standard to automatically control the heating process of coal, including fast ash, slow ash, Roga, bonding index, volatile matter, etc. It also has a self selection function. To meet other user requirements.

2、 Characteristics

l、 High degree of automation: The microcomputer real-time control system is composed of high-end microcontrollers, and various programs are strictly formulated according to national standards.

2. Stable and reliable performance: The main circuit is controlled by a high-power solid-state relay to automatically adjust the conduction angle, overcoming the problems of thyristor damage and temperature control overshoot in similar instruments. The temperature measuring element is a K-type thermocouple (originally an EU-2 type thermocouple).

3. High measurement accuracy: Compared with similar instruments, this instrument adopts PID regulation temperature control, and the instrument automatically controls the volatile matter without exceeding the temperature requirements of the national standard, avoiding the drawbacks of other instruments artificially adjusting heating time and temperature to meet the national standard requirements.

4. Easy to operate: This instrument uses a touch keyboard for input, making it easy to operate.

5. Clear and intuitive display: using ultra-high brightness LED digital display tube, displaying time and temperature values clearly and intuitively.

6. Cold end compensation: Constant current components are used to automatically compensate for the cold end of thermocouples.

3、 Technical indicators

1. Programmable temperature range: 000-1300 ℃ resolution l ℃

2. Programmable time range: 000-999min, resolution 1min

3. Temperature measurement error: ± 3 ℃

4. Time measurement error: ± 5/8h

5. Power supply voltage: 220V ± 20% V

6. Working hours: Continuous work for 24 hours