MHW-25-S

MHW-25-S-16CH MHW-25-S-16CH (4 Temperature Zone)MHWX-200 (Refrigerate via Compressor)MHW-480 (Refrigerate via All-in-One Compressor)MIHW-200-160CH-B (single stage compressor cooling systems)

Overview Specs Downloads FAQ Video

MHW-25-S-16CH MHW-25-S-16CH (4 Temperature Zone)MHWX-200 (Refrigerate via Compressor)MHW-480 (Refrigerate via All-in-One Compressor)MIHW-200-160CH-B (single stage compressor cooling systems)

MHW-25-S

Overview Specs Downloads FAQ Video

Desktop Temperature Test Chamber for Semiconductor Refrigeration

MHW-25-S

Volume, size and weight
Nominal Internal Volume

150L
Inside Dimensions

W500 mm×D500 mm×H600 mm
Overall Dimension

W750 mm×D1500 mm×H1750 mm (Without Bulge)
Weight

About 260kg
Performance
Testing Methods

GB/T 5170.2-2008 Temperature Test Equipment

GB/T 5170.5-2008 Damp and Heat Test Equipment
Temperature Range

-20℃～150℃
Temperature Fluctuation

≤1℃(No Load and Stable Temperature)
Temperature Deviation

±2.0℃ (No Load and Stable Temperature)
Heating Time

-20℃→+150℃ ≤60 min (No load, average nonlinearity)
Cooling Time

+20℃→-20℃ ≤45 min (No load, average nonlinearity)
Humidity Controllable Range Diagram (No Active Wet and Thermal Load)
Relative Humidity Deviation

±3.0%RH (Humidity＞75%RH); ±5.0%RH (Humidity≤75%RH)
Meet Testing Method

GB/T 2423.1-2008 Testing Method of Low Temperature Ab

GB/T 2423.2-2008 Testing Method of High Temperature Bb

GJB 150.3A-2009 High Temperature Test

GJB 150.4A-2009 Low Temperature Test

GB/T 2423.3-2006 Constant Damp and Heat Testing Method Cab

GB/T 2423.4-2008 Alternating Damp and Heat Test Method Db

GJB 150.9A-2009 Damp and Heat Testing

GB/T 10586-2006 Technical Conditions for Damp and Heat Test Chamber

GB/T 10592-2008 Technical conditions of high and low temperature test chamber

(Load is not greater than 35kg / m3 steel heat capacity. There is no active wet and heat load during damp and heat testing.)
Structure Characteristics
Thermal Insulation Enclosure Structure

Outer wall material: High quality cold rolled steel plate with plastic spraying and paint baking treatment on the surface.

Inner wall material: Stainless steel plate SUS304.

Box insulation material: rigid polyurethane foam and glass wool (insulation thickness: 100mm)

Door insulation material: Glass wool.
Air Conditioning Channel

Centrifugal fan, heater, evaporator (also dehumidifier), humidifier, etc.
Standard Configuration of Test Chamber

Lead hole (multiplicable): φ100mm with 2 lead hole.

(Equipped with soft rubber plugs. One on the left side and the other one on the right side of the box.)

Casters: 4个(With adjusting foot.)

Observation Window: Multi layer hollow electric heating film heating anti fog observation window (located on the door).

Visual Range: About 230×270 mm (wide*high). The glass is equipped with electric mist removal, which can provide the best observation sight line.

Floodlight: 1;

Sample rack (can be added): Two layers of high temperature resistant electrical insulation sample rack. Bearing capacity (uniform distribution): 10kg / layer (the cumulative total bearing capacity of samples in the box shall not exceed 40kg).
Door

Single hinged door (left hinge, right handle), equipped with observation window and lighting.

Window frame / door frame anti condensation electric heating device. Double layer silicone rubber sealing strip.
Control Panel

Controller display screen, overtemperature protection setter, etc.
Refrigeration Unit Room

Refrigeration Unit, Water Tray and Drainage Hole;

Condensing Fan, Lifting Water Pump and Water Storage Tank.
Power Distribution Control Cabinet

Main Power Leakage Circuit Breaker (One), Distribution Board (One), Exhaust Fan (One), Ethernet Physical Interface (One);

Temperature and Humidity Controller, AC Contactor, Circuit Breaker, Thermal Relay

Temperature limiting protector, solid state relay and transformer, etc.
Heater

Ni Cr alloy electric heating wire heater;

Heater control mode: contactless periodic pulse width modulation, SSR (solid state relay).
Humidifier

Stainless steel armored heater;

Heater control mode: contactless periodic pulse width modulation, SSR (solid state relay);

Water level control device, heater anti dry burning device.
Refrigeration System
Operation Mode

Mechanical compression single-stage refrigeration mode.
Refrigeration Compressor

"Taikang" fully enclosed compressor imported from France
Main Refrigeration Components

Expansion valve, pressure controller, drying filter, refrigeration solenoid valve, liquid reservoir, oil separator, etc.
Evaporator

Finned tube heat exchanger (also used as dehumidifier).
Condenser

Air cooled type: finned tube heat exchanger.
Throttling Device

Expansion Valve / Capillary
Refrigerator Control Mode

Control system automatically adjusts the operating conditions of the refrigeration unit compressor return air cooling circuit according to the test conditions.
Refrigerant

R404A (Ozone Wastage Index is 0)
Welding Technology

Nitrogen filled in order to protect welding.
Control System
Controller Model

Professional Temperature and Humidity Controller
Monitor

HD color LCD touch screen
Operation Mode

Program Mode and Setting Mode
Setting Mode

Color, Touch, Man-machine Interactive, Chinese/ English Interface
Control Mode

Anti integral saturation PID;

BTHC balance temperature and humidity control mode.
Temperature and Humidity Measurement Method

Class A armored PT100 sensor
Display Accuracy

Temperature: 0.01℃; Humidity: 0.1%RH; Time: 1min.
Overtemperature Protection

Independent overtemperature protector will protect the shutdown and send an alarm signal when the working room temperature exceeds the temperature set by the protection device.
Water Supply System
Water Supply Mode

Water Pump Lifting
Location of Water Supply Unit

Front water tank, drawer type water filling.
Water Supply Quality Requirements

Resistivity≥500Ω·m
safety Protection Unit
Refrigeration System

Compressor Overheating, Compressor Overload, Compressor Overpressure, Condensate Fan Overheating
Humidification System

Humidification heat pipe dry burning, abnormal water supply and drainage.
Test Chamber

Adjustable overtemperature, blower motor overload and overheating.
Others

Main power supply phase sequence and phase loss protection, leakage protection, overload and short circuit protection, power failure recovery protection.
Other Configurations
Power Cable

One Five Core Cable (Three-Phase Four Wire + Protective Ground Wire)
Main Power Leakage Circuit Breaker

Three phase four wire and protective ground wire.