Scope of Application

【Operating Instructions】

The constant temperature and humidity test chamber is used to test the performance of materials under various environmental conditions and to evaluate the heat resistance, cold resistance, dry resistance, and humidity resistance of various materials. It is suitable for quality inspection of products in electronics, electrical appliances, communications, instrumentation, vehicles, plastic products, metals, food, chemicals, building materials, medical equipment, aerospace, and other fields.

YS-M-150F-70 Two‑Layer Programmable Constant Temperature and Humidity Test Chamber

【Scope of Application】

The constant temperature and humidity test chamber is used to test the performance of materials under various environmental conditions and to evaluate the heat resistance, cold resistance, 

dry resistance, and humidity resistance of various materials. It is suitable for quality inspection of products in electronics, electrical appliances, communications, instrumentation, vehicles, 

plastic products, metals, food, chemicals, building materials, medical equipment, aerospace, and other fields.

【Applicable Standards】

- GB 11158 — Specifications for high‑temperature test chambers  

- GB 10589‑89 — Specifications for low‑temperature test chambers  

- GB 10592‑89 — Specifications for high/low‑temperature test chambers  

- GB/T 10586‑89 — Specifications for damp heat test chambers  

- GB/T 2423.1‑2001 — Low‑temperature test methods  

- GB/T 2423.2‑2001 — High‑temperature test methods  

- GB/T 2423.3‑93 — Damp heat test methods  

- GB/T 2423.4‑93 — Alternating damp heat test methods  

- GB/T 2423.22‑2001 — Temperature change test methods  

- IEC 60068‑2‑1.1990 — Low‑temperature test methods  

- IEC 60068‑2‑2.1974 — High‑temperature test methods  

- GJB 150.3 — High‑temperature test  

- GJB 150.4 — Low‑temperature test  

- GJB 150.9 — Damp heat test  

【Technical Parameters】

1. Values indicated are for air‑cooled type, at room temperature 20°C, no‑load condition.  

2. **Temperature range:** –40°C to +150°C  

3. **Humidity range:** 20% – 98% RH  

4. **Control stability:**  

   - Temperature: ±0.5°C  

   - Humidity: ±2.5% RH  

5. **Uniformity:**  

   - Temperature: ±2.0°C  

   - Humidity: ±3.0% RH  

6. **Heating rate:** From –40°C to +150°C, non‑linear 3–5°C/min  

7. **Cooling rate:** From +150°C to –70°C, non‑linear 1°C/min  

【Structure and Materials】

1. **Inner chamber dimensions:** H 500 × W 500 × D 400 mm  

2. **Outer dimensions:** H 1700 × W 1120 × D 1300 mm  

3. **Inner chamber material:** SUS#304 mirror‑finished stainless steel  

4. **Outer chamber material:** SUS#304 matte finish or metal baking paint  

5. **Insulation layer:** High‑density rigid PU foam and 24K glass wool  

6. **Base:** 4 castors + 4 levelling feet  

7. **Door:** Single door, left‑hand opening, handle on the left  

8. **Observation window:** 280×300×35 mm, multi‑layer high‑definition electrically heated anti‑fog tempered glass; interior fitted with an 11W imported fluorescent lamp; two operation ports above  

9. **Circulation fan:** 60W extended‑shaft motor with two multi‑blade impellers  

10. **Heater:** Finned tubular stainless steel electric heater  

11. **Internal accessories:** 2 sets of adjustable shelves, 2 stainless steel racks  

12. **Test hole:** Ø50 mm on the left side, with one stainless steel cover  

13. **Control panel:**  

    - 2 illuminated push‑button switches  

    - 1 temperature/humidity controller  

    - 1 main power switch  

14. **Water tank:**  

    - Front‑filling built‑in 24 L stainless steel tank  

    - 1 automatic water supply pump to supply humidifier and wet‑bulb water  

    - 1 water shortage alarm device  

15. **Refrigeration system:**  

    - Compressor: Original French “Tecumseh” fully hermetic type  

16. **Environmentally friendly refrigerant**  

    - Condenser: Finned type with cooling fan  

    - Evaporator: Finned type, multi‑stage automatic load adjustment  

17. **Other accessories:** Imported drier, oil separator, pressure protection switch, refrigerant flow sight glass, etc.  

    The unit uses two‑stage refrigeration.  

【Control System】

1. **Control method:** Balanced Temperature & Humidity Control (BTHC) system, using PID control of SSR, so that the heating/humidifying amount equals the heat/humidity loss, ensuring long‑term stable operation.  

2. **Temperature/humidity controller:** Taiwanese colour “E‑600” with Chinese/English interface; interactive data and information displayed on screen; single‑point and programmable control; adjustable backlight.  

3. **Resolution:** 0.01°C, 0.01% RH  

4. **Temperature range:** –100°C to +200°C  

5. **Humidity range:** 10% – 99.9% RH  

6. **Program segments:** 120 programs with 1200 segments memory; each segment can set temperature, humidity, and time simultaneously; can repeat operation up to 999 times; program operation includes standby, segment skip, and hold functions; features fixed‑value timer stop and program end functions; has preset start/stop and fault indication functions.  

7. **Temperature sensor:** PT‑100 (2 units)  

Main system components are equipped with safety detection interface devices. When a fault occurs, the screen immediately displays the fault status and cuts off the power.  

Cumulative operation time display function for reference.  

Program operation SV curve window.  

【Safety Protection Devices】

- Zero‑crossing solid‑state relay (SSR) power controllers: 2 sets  

- Dry‑heating prevention switch  

- Water shortage protection switch: 1 set  

- Compressor high‑pressure protection switch  

- Compressor overload protection switch  

- Compressor over‑current protection switch  

- Circuit protection fuses and insulated terminal blocks  

- 16A 3‑pole overload protector: 1 unit  

- Imported 1‑pole 6A overload protector: 1 unit  

- Water shortage protection device: 1 set  

【Operating Environment】**  

1. **Performance‑guaranteed ambient temperature:** 5°C – 30°C  

【Others】

1. Standard non‑woven fabric: 5 pieces  

2. **Power supply:** 3‑phase, 380 VAC, 8 kW  

Basic Information & Parts List** (to be provided separately)