MDF-U500VX TwinGuard ULT Freezers (-86°C)

MDF-U500VX TwinGuard ULT Freezers (-86°C)

Safe and Secure Extra-Large Capacity Ultra-Low Freezer with Dual Cooling System

Secure storage with new dual cooling system

The Dual Cooling System securely stores valuable biological samples using two independent compressors to maintain reliable -86˚C conditions.
If one cooling circuit fails, the other maintains at least -65˚C.

Chamber Temperature Behavior

시간 (hour)	0	1	2	3	4	5	6	7	8	9	10	11	12
상태	Pull-up while a power failure / Single compressor operation (-65°C 유지) / Normal cycle operation (-80°C 설정)

세 가지 상태 비교:

• Normal cycle operation (-80°C setting)
• Single compressor operation (kept at approx. -65°C)
• Pull-up while a power failure

*Unexpected compressor failure will trigger an alert.
*Measured example (AT23˚C, 230V/50Hz, no load). Actual performance may vary.

Independent Systems

Efficient ultra-low cooling is achieved through two independent evaporator circuits (A, B) surrounding the interior chamber.
(View from right rear of unit, -86°C operation)

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Intelligent ECO mode operation

“ECO mode” independently controls compressors A and B to optimize operation and minimize energy consumption by monitoring freezer load status.

ECO vs NORMAL Mode Operation

항목	ECO Mode	NORMAL Mode
Compressor Control	Independent (Pattern2, Pattern3)	Simultaneous ON/OFF
Temperature Stability	Maintained at -80°C	Maintained at -80°C
Efficiency	Optimized for load	Standard

*Ambient 30˚C (-80˚C setting).
*Measured example (AT23˚C, 230V/50Hz, no load).

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Graphic control panel

Central LCD display enhances visibility and operability.
Data log function retains operation data and transmits to PC via MTR-480-PW interface.
Software installation required for log data transfer.

LCD Display Example

Top Screen
Temp: -80°C
Control:
Alarm:
Status:
Door:
MENU  Set  Log  Tools
-80°C
2008/10/06 09:45:39

Panel Buttons

ALARM  CONTRAST  BUZZER  CE  MENU  ENTER
1 2 3
4 5 6
7 8 9
  0
↑ ↓ ← →

Microprocessor memory backup ensures recovery after power failure.
Self-diagnostics display error codes if abnormalities occur.

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High efficiency insulation using V.I.P. technology

Equipped with VIP PLUS insulation — six times stronger thermal resistance with same wall thickness but improved rigidity using polyurethane foam.

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User-friendly design

Multiple alarms (high/low temperature, door ajar, power failure, part replacement) safeguard samples even in emergencies.

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Installation space

The VIP panel reduced wall thickness from 140mm to 70mm, increasing storage capacity by ~30% without enlarging the footprint.

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Improved air seal heat resistance structure

Enhanced chamber sealing reduces frosting and supports ECO mode operation.

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Status Alert

Continuous monitoring detects voltage drops, abnormal temperature rise, overload, and door status.
Flashing lamp and control panel indicators notify users of issues such as high ambient temperature (>35˚C), low ambient (<0˚C), or battery replacement timing.

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Specifications

항목	내용
External Dimensions (W×D×H)	770 × 870 × 1990 mm
Internal Dimensions (W×D×H)	630 × 600 × 1380 mm
Volume	519 L
Net Weight	320 kg
Capacity (Aluminium Racks 2” Boxes)	352 boxes
Capacity (Stainless Steel Racks 2” Boxes)	224 boxes
Cooling Performance	-86 °C
Temperature Setting Range	-50 to -90 °C
Temperature Control Range	-50 to -86 °C
Controller	Microprocessor, non-volatile memory
Display	LCD digital display with numerical keys
Temperature Sensor	Pt-1000
Refrigeration System	Independent Dual-Cooling
Compressors	2 × 1100 W
Refrigerant	HFC
Insulation Material	PUF / VIP Plus
Exterior Material	Painted Steel
Interior Material	Painted Steel
Outer Doors	1
Outer Door Lock	Yes
Inner Doors	2
Shelves	3
Max. Load per Shelf	50 kg
Vacuum Release Port	1 (manual)
Access Ports	3 (back ×1, bottom ×2)
Access Port Diameter	17 mm
Casters	4 (2 leveling feet)
Power Failure / High Temp / Low Temp / Door Open	V-B-R / V-B-R / V-B-R / V-B
Filter	Filter-less
Power Supply / Frequency	Local
Noise Level	53 dB(A)

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Accessories

옵션	모델명
Small Inner Door Kit	MDF-5ID-PW
Liquid CO₂ Back-up	CVK-UB2-PW
Circular Temperature Recorder	MTR-G85C-PE, MTR-G85A-PA
Continuous Strip Recorder	MTR-85H-PW
Recorder Housing	MDF-S3085-PW (for MTR-85H)

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