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For MDF-1156/1156ATN
Advanced Features
Specially designed compressor and
Self-diagnostic function
Why Freeze to –152˚C?
cascade refrigeration system
The temperature sensor, filter sensor and
cascade sensor monitor operation conditions
continuously. Should abnormality be picked
up, an error code and the current tempera-
ture will be displayed in turn.
Recrystallization Mechanism (Artist’s Concept)
Specially designed
for rugged ultra-low
temperature
applications in a
laboratory
Hexagonal crystal
–80˚C
Cubic crystal
environment (HFC
refrigerants only).
Ring back function
–130˚C
Recrystallization point
Amorphous
The alarm buzzer can be silenced by press-
ing the BUZZER key on the control panel.
(The remote alarm signal is not cancelled.)
Should the alarm condition continue after a
certain suspension, the alarm buzzer sound
will resume.
–152˚C
ice crystal
Micro-processor Temperature
Control with LED Digital Display
World’s lowest –152˚C freezer
ensures stable cell and tissue
preservation
An important factor to consider when
preserving cells or tissue at ultra-low
temperatures is to prevent amorphous ice
crystals from recrystallizing within and
outside the cells. Samples that are
maintained in an ultra-low temperature
freezer at –152˚C which is far lower than the
recrystallization point (–130˚C for pure water)
can be preserved semi-permanently.
Preservation at ultra-low temperatures
maintains vitrification without crystallization
occurring inside and outside cells.
In contrast to conventional liquid nitrogen
preservation containers, freezer preservation
has numerous advantages: no sample
contamination, no sudden liquid eruptions,
as well as low operational costs.
Extremely accurate, easy-to-read display.
The temperature inside the freezer can be
set and monitored easily by means of a
microprocessor temperature control with an
LED digital display. The thermostat
incorporates a platinum resistor (Pt. 100Ω),
precision and durability.
Easy Maintenance (MDF-193/193AT have
no filters)
Filter check lamp notifys
the user of a clogged
condenser filter.The
condenser filter is situat-
ed at the front panel to
make filter removing
and cleaning easier.
Integrated Cabinet Design
High-performance refrigeration system with
foamed-in-place cabinet insulation
maximizes interior temperature uniformity
and protects against fluctuating ambient
temperatures.
Note: The position of the filter check lamp is shown
on the control panel (see photo shown at the
bottom of this page).
Standard casters and levelling feet
Standard-equipped heavy duty casters make
it easy to move a freezer when necessary.
The levelling feet keep a freezer level and
firm on the floor.
Hot line for secure sealing
Moisture condensation at the top edges of
the cabinet due to differences in tempera-
ture inside and out causes frost and icing
problems that may reduce heat insulation
efficiency and obstruct door movements.
These problems are prevented by the “hot
line” by means of which hot gas from the
higher temperature circuit is circulated
through the problem areas.
SANYO’s MDF-1156 and 1156ATN make
long-term storage below the recrystallization
point easier and more stable than ever
before.
Safety Device
Built-In Temperature & Power
Failure Alarms (Lamp/Buzzer)
In case of power failure or an irregular rise in
temperature, a rechargeable battery-operat-
ed indicator lamp and alarm will be activat-
ed. A compact recording unit which auto-
matically records the inside temperature,
and a backup system with liquefied CO2 or
N2 which is selfactivated when a power out-
age occurs are also available separately. This
equipment helps insure that the contents
will be protected in the event of any power
failure or mechanical trouble.
Hot line
Control panel
1
2
Alarm lamp and buzzer
Filter check lamp
3
Buzzer key
Alarm test key
1
2
4
5
Mode setting key
6
Digit shift key
Numerical value shift key
Power switch
CO2 back-up test swich (AT type only)
CO2 back-up swich (AT type only)
Battery switch
3
4
5
6
7
7
8
9
9
10
11
12
10
11
8
12
Temperature recorder
MDF-394AT
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–86˚C Ultra-Low Temperature Chest Freezers
Ideal for large-capacity preservation
MDF-794/794AT
TEMPERATURE
EFFECTIVE CAPACITY
(24.8cu.ft.)
–86˚C 701L
Dimensions Unit: mm (inch)
2570 (101.2)
861 (33.9)
2110 (83.1)
770 (30.3)
53
(2.1)
38
(1.5)
MDF-794AT
1840 (72.4)
500 (19.7)
105 (4.1)
Performance Data
Pull-down characteristics
under no-load condition
30
Pull-up characteristics
during power failure
Effect of ambient temp.
on holding time of liquefied gas
30
20
20
15
10
5
20
10
Central air temp. in cabinet
Central air temp. in cabinet
Ambient temp. 30˚C, no load
SV of backup system –70˚C
LCO2 30kg
10
Ambient temp. 30˚C, no load
0
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–10
–20
–30
–40
–50
–60
–70
–80
–90
0
1
2
3
4
5
6
7
8
9
10
0
1
2
3
4
5
6
7
8
9
10
5
10
15
20
25
30
35
Time (hr.)
Time (hr.)
Ambient temp. (˚C)
Ideal for middle-sized installation space
MDF-594/594AT
TEMPERATURE
EFFECTIVE CAPACITY
(17.1cu.ft.)
–86˚C 487L
861 (33.9)
Dimensions Unit: mm (inch)
2010 (79.1)
770 (30.3)
38 (1.5)
53
(2.1)
1550 (61.0)
MDF-594AT
1280 (50.4)
500 (19.7)
105 (4.1)
Performance Data
Pull-down characteristics
under no-load condition
Pull-up characteristics
during power failure
Effect of ambient temp.
on holding time of liquefied gas
30
20
30
20
20
15
10
5
Central air temp. in cabinet
Ambient temp. 30˚C, no load
Central air temp. in cabinet
Ambient temp. 30˚C, no load
SV of backup system –70˚C
LCO2 30kg
10
10
0
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–10
–20
–30
–40
–50
–60
–70
–80
–90
0
1
2
3
4
5
6
7
8
9
10
0
1
2
3
4
5
6
7
8
9
10
5
10
15
20
25
30
35
Time (hr.)
Time (hr.)
Ambient temp. (˚C)
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Low-profile design for easy access to stored materials
MDF-394
TEMPERATURE
EFFECTIVE CAPACITY
(10.9cu.ft.)
–86˚C 309L
Dimensions Unit: mm (inch)
891 (35.1)
1860 (73.2)
800 (31.5)
38 (1.5)
53
(2.1)
1400 (55.1)
1120 (44.1)
520 (20.5)
MDF-394
105 (4.1)
Performance Data
Pull-down characteristics
under no-load condition
Pull-up characteristics
during power failure
Effect of ambient temp.
on holding time of liquefied gas
30
20
30
20
20
15
10
5
SV of backup system –70˚C
LCO2 30kg
Central air temp. in cabinet
10
10
0
Ambient temp. 30˚C, no load
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–10
–20
–30
–40
–50
–60
–70
–80
–90
Central air temp. in cabinet
Ambient temp. 30˚C, no load
0
1
2
3
4
5
6
7
8
9
10
0
1
2
3
4
5
6
7
8
9
10
5
10
15
20
25
30
35
Time (hr.)
Time (hr.)
Ambient temp. (˚C)
Compact, space-saving unit optimized for private use
MDF-193/193AT
TEMPERATURE
EFFECTIVE CAPACITY
(3.0cu.ft.)
–86˚C 86L
Dimensions Unit: mm (inch)
791 (31.1)
750 (29.5)
700 (27.6)
53
(2.1)
38 (1.5)
MDF-193
480 (18.9)
430 (16.9)
Performance Data
Pull-down characteristics
under no-load condition
Pull-up characteristics
during power failure
Effect of ambient temp.
on holding time of liquefied gas
30
20
30
20
10
20
15
10
5
Central air temp. in cabinet
Ambient temp. 30˚C, no load
10
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–10
–20
–30
–40
–50
–60
–70
–80
–90
Central air temp. in cabinet
Ambient temp. 30˚C, no load
SV of backup system –70˚C
LCO2 30kg
0
1
2
3
4
5
6
7
8
9
10
0
1
2
3
4
5
6
7
8
9
10
5
10
15
20
25
30
35
Time (hr.)
Time (hr.)
Ambient temp. (˚C)
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Specifications
Model No.
MDF-1156/1156ATN
–125˚C to –152˚C
1,400 x 800 x 945
(55.1 x 31.5 x 37.2)
500 x 450 x 572
MDF-794/794AT
MDF-594/594AT
–50˚C to –86˚C
MDF-394*
MDF-193/193AT
Temperature Range
Exterior Dimensions
[W x D x H] mm (inch)
Interior Dimensions
[W x D x H] mm (inch)
Effective Capacity
Exterior Cabinet
Interior Cabinet
Inner Lid
2,570 x 770 x 1,070
(101.2 x 30.3 x 42.1)
1,840 x 500 x 762
(72.4 x 19.7 x 30.0)
701 liters (24.8 cu.ft.)
2,010 x 770 x 1,070
(79.1 x 30.3 x 42.1)
1,280 x 500 x 762
(50.4 x 19.7 x 30.0)
487 liters (17.1 cu.ft.)
1,860 x 800 x 945
(73.2 x 31.5 x 37.2)
1,120 x 520 x 530
(44.1 x 20.5 x 20.9)
309 liters (10.9 cu.ft.)
750 x 700 x 945
(29.5 x 27.6 x 37.2)
480 x 430 x 420
(18.9 x 16.9 x 16.5)
86 liters (3.0 cu.ft.)
(19.7 x 17.7 x 22.5)
128 liters (4.5 cu.ft.)
Galvanised steel with baked on finish
Aluminum plate
1
Stainless steel
3
4
1
Insulation
Foamed-in-place rigid polyurethane
High stage side
Hermetic type, 1,100 W
Hermetic type, 1,100 W
Cascade condenser
Tube on sheet (shared with interior)
Fin and tube type
Shell and tube type Cascade condenser
Hermetic type, 450 W
Hermetic type, 750 W
Hermetic reciprocated type,
450 W
Compressor
Evaporator
Condenser
Low stage side
High stage side
Low stage side
High stage side
Low stage side
Tube-on-sheet type
Finless tube type
Fin and tube type
Cascade condenser
Microprocessor
control system,
Non-volatile memory
Microprocessor: Keypad input
Temp. input range: –20˚C to –95˚C (1˚C increment)
Set value memory: non-volatile memory
Temperature Control
Temperature Display
Sensor
Digital display
Platinum resistance (Pt. 1000 Ω)
Platinum resistance (Pt. 100 Ω)
Safety
Cylinder key on the lid handle and Mouse proof cover on the back side
Adjustable high and low temp. alarm
( 5˚C to 20˚C from set point)
Selectable high temp. alarm (+10˚C & +15˚C from set point)
Alarm system
Power failure alarm, Filter check lamp (Except MDF-193/193AT which have no filters), Remote alarm contact
265kg (584 lbs.) —1156
272kg (600 lbs.) —1156ATN
335kg (739 lbs.) —794
345kg (761 lbs.) —794AT
291kg (642 lbs.) —594
301kg (664 lbs.) —594AT
103kg (227 lbs.) —193
109kg (240 lbs.) —193AT
Net Weight (Approx.)
219kg (483 lbs.)
ATN: LN2 backup system, temperature recorder
AT: LCO2 backup system, temperature recorder
*MDF-394 for 110 to115V and 220V/60Hz is unavailable.
Optional Accessories
Storage Racks (Aluminium)
Temperature Recorder
Model No.
MDF-19SC
MDF-39SC
MDF-49SC
MDF-59SC
Model No.
MTR-85H
MTR-155H
Case Dimensions
(W x D x H)
207 x 144 x 413mm
8.1” x 5.7” x 16.3”
155 x 155 x 515mm
6.1” x 6.1” x 20.3”
207 x 144 x 539mm
8.1” x 5.7” x 21.2”
207 x 144 x 665mm
8.1” x 5.7” x 26.2”
Recording
Range
–100 to +50˚C
–170 to +30˚C
Number of Drawers
Applicable Model
(Rack capacity)
3
4
4
5
MDF-193
MDF-394
MDF-594
MDF-794
Freezer
Model
MDF-594/594AT (18)
MDF-794/794AT (24)
MDF-1156
MDF-193/193AT (6)
MDF-394 (20)
MDF-1156/1156ATN (6)
Inventory Racks (Stainless steel)
ULT-Freezer Backup Kits
External Dimensions (mm)
Box Type
(Capacity)
Freezer Model (Rack capacity)
Model No.
CVK-UB2/UB2(I):
LCO2 Backup Kit for MDF-794/594/394
Width Depth Height
IR-207C
IR-209C
IR-213C
IR-305C
IR-306C
IR-309C
2” (7)
2” (9)
2” (13)
3” (5)
3” (6)
3” (9)
144
144
144
144
144
144
142
142
142
142
142
142
405
518
592
405
518
747
MDF-193 (6)
CVK-UBN2/UBN2(I):
LN2 Backup Kit for MDF-794/594/394
CVK-A: Built-in LCO2 Backup Kit
MDF-394 (21), 1156 (9)
MDF-594 (24), 794 (36)
MDF-193 (6)
for MDF-794/594/394/193
CVK-AT2: LCO2 Backup Kit for MDF-1156
CVK-ATN2: LN2 Backup Kit for MDF-1156
(I) version for North America only
MDF-394 (21), 1156 (9)
MDF-594 (24), 794 (36)
IR-209C
IR-306C
MDF-39SC MDF-59SC
*Cooling performance is indicated by the temperature reached at the center of the freezer (at ambient temperature of 30°C with no load).
In order to use the freezer at a stable temperature for a long time, it is recommended that the temperature be set to at least 5°C higher
than the indicated lowest temperature.
In addition, depending on the usage conditions, it may not be possible to reach the indicated lowest temperature.
Caution:
SANYO guarantees the product under certain warranty conditions.
SANYO in no way shall be responsible for any loss of content or damage to content.
• Appearance and specifications are subject to change without notice.
SANYO Electric Co., Ltd., Biomedical Division, Gunma is certified for:
Quality management system: ISO9001 / Medical devices quality management system: ISO13485 / Environmental management system: ISO14001
RoHS (European Restriction of Hazardous Substances directives) compliant
Distributed by:
SANYO Electric Co., Ltd.
Biomedical Division
©2008 SANYO Printed in Japan 2008.12 MA
SHR141
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