Yamato SM520 User manual

Vertical Pressure Steam Sterilizer
SM520/820
SM530/830
First Edition
Thank you for purchasing SM series vertical pressure steam steriizer of Yamato
Scientific.
To use this unit properly, read this "Instruction Manual" thoroughly before using
this unit.
Keep this instruction manual around this unit for referring at anytime.
WARNING!:
Carefully read and thoroughly understand the important warning items
described in this manual before using this unit.
Yamato Scientific America Inc.

Contents
1. Safety Precautions ................................................................. 1
Explanation.......................................................................... 1
Table of Illustrated Symbols ............................................................ 2
Warning・Caution .................................................................... 3
2. Before Using ...................................................................... 6
Installation precautions ................................................................ 6
Preparation before operation .......................................................... 10
3. Description and Function of Each Part.............................................. 16
Main unit (front·top·back) ............................................................. 16
Main unit (internal structure)........................................................... 17
Operation panel ..................................................................... 18
4. Operation Method................................................................. 19
Choose operation mode .............................................................. 19
Function list......................................................................... 20
Help function........................................................................ 22
User Set Function ................................................................... 23
Operation course (liquefy & retain temp.)................................................ 25
Operation course (sterilize & retain temp.)............................................... 34
Operation course (instrument sterilize).................................................. 43
Operation course (fluid sterilize) ....................................................... 49
Operation course (instrument dry)...................................................... 55
Operation course (sterilize & dry) ...................................................... 61
Shortcut function (preheating) ......................................................... 69
Shortcut function (memory) ........................................................... 72
Shortcut function (schedule)........................................................... 76
Shortcut function (initial setting value) .................................................. 81
Shortcut function (optional connector) .................................................. 82
External Output Terminal (optional)..................................................... 83
5. Handling Precautions ............................................................. 85
6. Maintenance Method .............................................................. 88
Daily Inspection and Maintenance...................................................... 88
7. Long storage and disposal......................................................... 89
When not using this unit for long term / When disposing................................... 89
Notes about disposal................................................................. 89
8. In the Event of Failure ............................................................. 90
Safety Device and Error Code ......................................................... 90
Trouble Shooting .................................................................... 92
9. After-sales Service and Warranty ................................................... 93
When need repair ................................................................... 93
10. Specification .................................................................... 94
11. Wiring Diagram .................................................................. 96
12. Piping Diagram .................................................................. 98
13. Replacement Parts Table ......................................................... 99
14. List of Dangerous Substances.................................................... 101

15. Installation Standard Manual ..................................................... 102
16. Maintenance and Replacement ................................................... 103
Pressure gauge and safety valve ..................................................... 103
17. Regular Spot Check............................................................. 104
Regular self-checking of small pressure container ....................................... 104

1
1. Safety Precautions
Explanation
MEANING OF ILLUSTRATED SYMBOLS
Varioussymbols are used in thissafety manual in order to use the unit without
danger of injury and damage of the unit. A list of problems caused by ignoring
the warningsand improper handling isdivided asshown below.Be sure that you
understand the warningsand cautionsin this manual before operating the unit.
WARNING! If the warning is ignored, there is the danger of a problem that
may cause a serious accident or even fatality.
CAUTION! If the caution is ignored, there is the danger of a problem that may
cause injury/damage to property or the unit itself.
Meaning of Symbols
This symbol indicates items that urge the warning (including the caution).
A detailed warning message is shown adjacent to the symbol.
This symbol indicates items that are strictly prohibited.
A detailed message is shown adjacent to the symbol with specific actions not to
perform.
This symbol indicates items that should be always performed.
A detailed message with instructions is shown adjacent to the symbol.
Illustrated Symbols

2
1. Safety Precautions
Table of Illustrated Symbols
Warning
Warning,
high voltage
Warning,
high temperature
Warning,
drive train
Warning,
explosive
Caution
Caution,
generally
Caution,
electrical shock
Caution,
scald
Caution,
no load heating
Caution,
not to drench
Caution,
water only
Caution,
deadly poison
Prohibit
Prohibit,
generally
Prohibit,
inflammable
Prohibit,
to disassemble
Prohibit,
to touch
Compulsion
Compulsion,
generally
Compulsion,
connect to the
grounding
terminal
Compulsion,
install on a flat
surface
Compulsion,
disconnectthe
powerplug
Compulsion,
periodical
inspection

3
1. Safety Precautions
Warning・Caution
Warning
Do not use this unit in an area where there is flammable or explosive gas
Never use this unit in an area where there is flammable or explosive gas. This unit is not
explosion-proof. An arc may be generated when the power switch is turned on or off, and
fire/explosion may result. (Refer to page 104—14. List of Dangerous Substances)
Always ground this unit
Always ground this unit on the power equipment side in order to avoid electrical shock due to a
power surge.
If a problem omlurs
If smoke or strange odor should come out of this unit for some reason, turn off the circuit breaker
right away, and then disconnect the power plug or power terminal. Immediately contact a service
technician for inspection. If this procedure is not followed, fire or electrical shock may result. Never
perform repair work yourself, since it is dangerous and not recommended.
Do not use the power cord if it is bundled or tangled
Do not use the power cord if it is bundled or tangled. If it is used in this manner, it can overheat and
fire may be caused.
Do not process, bend, wring, or stretch the power cord forcibly
Do not process, bend, wring, or stretch the power cord forcibly. Fire or electrical shock may result.
Substances that can not be used
Never use explosive substances, flammable substances and substances that include explosive or
flammable ingredients in this unit. Explosion or fire may omlur. (Refer to page 104—14. List of
Dangerous Substances)
Do not disassemble or modify this unit
Do not disassemble or modify this unit. Fire or electrical shock or failure may be caused.
Do not get close to the vapor outlet / Do not block the outlet
The vapor outlet is provided on the left face of equipment. Do not put your hands or face close to the
outlet. Do not block the outlet.A burn injury or equipment failure may result in.

4
1. Safety Precautions
Warning・Caution
Caution
When opening the cover...
Make sure that the pressure of equipment has decreased to 0(zero) MPa before
opening the cover. Generally the cover does not open due to the safety lock
mechanism under the high pressure condition. The high-temperature and pressure
vapor blows out if the cover is forced open under high pressure, which may cause a
burn injury. A large amount of vapor blows out from inside of the chamber when
opening the cover just after the sterilizing operation has completed (when the
temperature inside the chamber is high). Do not put your hands and face close to the
cover.
When draining water...
Make sure that the pressure of equipment has decreased to 0(zero) MPa before draining the
sterilizing water. The hot water blows out if the valve is opened under high pressure. The sterilizing
water remains very hot just after the sterilizing operation has completed even the pressure reading is
0(zero) MPa. Drain the water after it is sufficiently cooled down.
Do not touch the drain bottle during operation
A drain bottle, which contains hot water during and just after operation, is placed inside the door in
the front face of equipment. To avoid a burn injury, remove the bottle after the water is sufficiently
cooled down. Do not open the door during the operation of equipment.
Make sure to drain the water when the water level comes to the seal
position
The hot water or vapor may blow out from the drain bottle if the equipment is operated with too much
drain water (water level above the seal position). (Refer to 15 of “Preparation before operation” in
Page 13 for details.)
Securely fix the silicon plug of the drain bottle
Securely fix the silicon plug when installing the drain bottle. The hot water or vapor may blow out
from the drain bottle if the equipment is operated with the plug loosen. (Refer to 5 of “Preparation
before operation” in Page Error! Bookmark not defined. for details.)
Do not touch the hot section
Some sections on the equipment such as the circumference of cover or drain bottle are very hot
during or just after the operation of equipment. Do not touch these sections to avoid burn injury.

5
1. Safety Precautions
Warning・Caution
Caution
When taking the sterile samples from the chamber...
Sufficiently remove the vapor inside the chamber before taking the sterile samples from the
chamber. Wear heat-resistant leather gloves to take them from the chamber to protect your
hands from high-temperature samples.
Do not touch the heat releasing outlet
Do not directly touch the heat releasing outlet located around the outer covering. The vapor may
blow out from the safety valve by an amlident during sterilizing operation. Do not block the outlet.
During a thunder storm
During a thunderstorm, turn off the power key immediately, then turn off the circuit breaker and the
main power. If this procedure is not followed, fire or electrical shock may be caused.
When power failure occurs...
The lock lever on the cover goes into locked state for safety reasons when the power is turned off
due to a power failure. The state is automatically cancelled when the power is turned on and the
pressure inside the equipment decreases.
Do not operate the equipment without supplying sufficient amount of water
Do not operate the equipment without supplying sufficient amount of water. The heater is exposed
to the open-air if the amount of water supplied is insufficient, which causes a deterioration or
breakage of equipment. Make sure before operation that the appropriate amount of water is
supplied inside the chamber. (Refer to 8 of “Preparation before operation” in Page 11 for details.)
Do not open the panel on the outer covering
Touching the interior portion of equipment may cause an electric shock, burn injury, fire disaster or
equipment failure.
Do not touch the power plug with a wet hand
An electric shock may result in.
Do not place your hand over the top board
The hand may be stuck in the cover and injured.
Put samples after preheating
Do not open the cover during preheating due to steam pressure in cylinder. Before putting
samples, press preheating kry, switch the heater to OFF state, waiting for 20 senconds, open the
cover after the cylinder pressure getting down.

6
2. Before Using
Installation precautions
1. Choose a proper place for installation
Do not install this unit in a place where:
Rough or dirty surface.
Flammable gas or corrosive gas is generated.
Ambient temperature 35C and above or 5C and below.
Atmosperic pressure without 70KPa～106KPa.
Altitude is higher than 3km.
Humidity is over 80%..
There is direct sunlight.
There is a constant vibration.
The power source is instable. (voltage fluctuation exceeds nominal voltage at ±10﹪)
Pollution degree is over class 2.
Install this unit on a stable place with the space as shown below.
30cm or more
15cm
or
more
15cm or more
15cm
or
more
Back side
Front side
2. Installation on horizontal surface
Use the equipment on the horizontal and firm place to keep the water inside the chamber
horizontal. If the equipment tilts and the heater appears from the water surface, the
temperature on the area above the water rises and a heater failure or operation stop due to
water level detector function may omlur.
The weight of main unit is approximately 110kg～140kg. Carry and install the equipment
carefully by four or more persons.

7
2. Before Using
Installation precautions
3. Before/after installing
It may cause injure to a person if this unit falls down or moves by the earthquake and the
impact. etc..To prevent, take measures that the unit cannot fall down, and not install at busy
place.
4. Do not install the equipment near alarm device
The equipment releases large amount of vapor when the cover is opened just after the
operation is completed. Amlordingly, do not install the equipment on the site over which
electrical equipment especially an alarm device is provided over it.
5. Ventilate the equipment sufficiently
Do not block the heat releasing outlets on the side face and back face of equipment during
operation. The temperature inside the equipment rises, which may cause the deterioration or
failure of equipment, amlident, or fire disaster.
6. Do not use this unit in an area where there is flammable or explosive gas
Never use this unit in an area where there is flammable or explosive gas. This unit is not
explosion-proof. An arc may be generated when the power switch is turned ON or OFF, and
fire/explosion may result.
To know about flammable or explosive gas, refer to page 104—14. List of Dangerous
Substances.
爆発性ガス
可燃性ガス

8
2. Before Using
Installation precautions
7. Choose a correct power distribution board or socket
Choose a correct power distribution board or socket that meets the unit’s rated electric
capacity
Operating voltage range for respective equipment models are as follows:
SM520 and SM820:AC100-120V
SM530 and SM830:AC200-240V
Electric
capacity:
SM520: AC100V-120V 20.5A-24.5A
SM820:AC100V-120V 20.5A-24.5A
SM530: AC200V-240V 10.5A-12.5A
SM830:AC200V-240V 10.5A-12.5A
＊There could be the case that the unit does not run even after turning ON the power. Inspect
whether the voltage of the main power is lowered than the specified value, or whether other
device(s) uses the same power line of this unit. If the phenomena might be found, change the
power line of this unit to the other power line.
＊Connection with a branching receptacle or extended cable lowers electrical power voltage,
which may cause the degradation of temperature adjusting capability.
8. Handling of power code
Do not entangle the power cord. This will cause overheating and possibly a fire.
Do not bend or twist the power cord, or apply excessive tension to it. This may cause a fire
and electrical shock.
Do not lay the power cord under a desk or chair, and do not allow it to be pinched in order
to prevent it from being damaged and to avoid a fire or electrical shock.
Keep the power cord away from any heating equipment such as a room heater. The cord's
insulation may melt and cause a fire or electrical shock.
If the power cord becomes damaged (wiring exposed, breakage, etc.), immediately turn off
the power at the rear of this unit and shut off the main supply power. Then contact your
nearest dealer for replacement of the power cord. Leaving it may cause a fire or electrical
shock.
Connect the power plug to the receptacle which is supplied appropriate power and voltage.

9
2. Before Using
Installation precautions
9. Always ground this unit
The D class earth connecting works is required if no ground terminal is provided. In this
case, consult with the selling office where you purchased or our sales office.
Securely connect the power plug to the switchboard or outlet.
SM530/830
G
G
An earth connecting outlet is recommended to be
used.
SM520/820
These models do not include the power plug.
Correctly connect the ground to fit with the power
supply facility to be connected.
Do not connect the earth wire to gas or water pipes. If not, fire disaster may be caused.
10. Connect the power cord paying attention to the color of each core wire
When connecting the power cord, do check the
breaker on the electric power equipment be "OFF".
Note: SM520 and SM820 do not equip with the power
plug. Select and connect the appropriate plug or
terminal corresponding to the power capacity that is
adjusted to the status of the power supply equipment
side.
Core Wire Color
Interior Wiring
Brown
Positive voltage
Blue
Negative voltage
Yellow green
Ground Wire Side
Power plug
Earth connecting outlet
緑（アース端子へ）
M5用丸端子
黒（定格電源端子へ）
白（定格電源端子へ）
Rounded terminal
for M4
Green (to ground)
Black (to power supply)
White (to power supply)

10
2. Before Using
Preparation before operation
(1)
Determine the installation site
If there is a bump on the floor, the casters may receive excessive load and get damaged. In
this case, lift and move carefully by four or more persons.
Install the equipment referring to 1 to 5 of "Installation precautions" in Page Error! Bookmark
not defined. and 7.
(2)
After the unit is placed in the desired
position, lock the stopper button of the
casters
Only the two casters on the front side of the
unit are equipped with a stopper.
Lock
Release
(3)
Connecting the power
・Connect the power referring to 7 to 10 of " Installation precautions " in Page 8 and 9.
(4)
Open the cover
Turn on the electric leakage
breaker at the right side of
equipment and turn on the
power to open the cover.
The safety lock is released
and the cover can be opened.
・Slide the lock lever on the
cover to the right and grasp
the handle of cover to open it.
Turn the lock lever to the left to close the cover.
Turn the lock lever to the right to open the cover.
电源接通前不能开锁
(5)
Pour water into the cooling
water box
・Pour 2000ml water into the
cooling water box, 1-2mm
higher than the red indicator
line.
・After pouring water, please
plug tightly the silicone
stopper.
Keep locked before
power on
Silicone
stopper
(filler)
Water level
indicator
Water box
drain valve
Water box
outlet
Cylinder
drain valve

11
2. Before Using
Preparation before operation
(6)
Set the attached heater baffle onto the
bottom surface inside the chamber
・The heater baffle stabilizes the sterile
samples inside the chamber as well as
protects the heater and sensor. Make sure
to set it.
(7)
Close the drain valve
Close the drain valve at the bottom on the
left side face of main unit. Water leak
omlurs if not fully closed, which may
cause the burn injury or no-load (water)
operation.
Connect an appropriate hose (inner
diameter: 12mm) to the rear water outlet
and lead it to the draining site.
(8)
Pour water into the chamber
Before setting the sterile samples, pour
water into the chamber to the water level
gauge (notch) position.
Insufficient water may cause the no-load
(water) operation. Check the water level
every time before operation. Refill it
before the level becomes too low. Water
is required to be poured at dissolution
operation, as well as sterilizing operation.
When the water level lowers, the
equipment detects an abnormality (“Er20”)
and cuts off the heater. Depending on
the conditions of equipment, however, the
detection requires too much time, which
may cause the heater deterioration.
Refill water before the water level
becomes too low.
Water QTY for models
6500～6600 ml
(9)
Replace the water in cylinder
・Fill distilled or purified water to conduct sterilization! Do not use tap water or well water
directly!
・Confirm the water quality in cylinder before putting samples. If discolored or turbid,
please clean the cylinder, and replace with new distilled or purified water!
Set the heater baffle
horizontally.
Close
Open
く
Water
outllet
Min.
Max.
Water level
gauge

12
2. Before Using
Preparation before operation
(10)
Set the sterile samples
Set the samples to the chamber, putting them into the attached sample basket.
Put the sample or sterilization bag into the chamber so they should not block or cover the
sensor inside the chamber, exhaust outlet and end connection to pressure gauge. If they
are blocked or covered, the vapor cannot be discharged and the equipment cannot be
operated correctly. Do not spill the samples when taking them out from/putting them into
the chamber. The failure in piping system, bad smell or dirt may result in.
In case liquid such as medicinal solution or medium is sterilized, the amount of liquid
should be 60% or less of the capacity of container. They may be boiled over if too much
quantity is supplied.
Widely open the opening of sterilization bag when used. If it is closed, the samples are
insufficiently sterilized.
(11)
Close the door before operation
Make sure to close the door of equipment before operation. If the door is not fully closed,
the cooling water box may be touched and may cause a burn injury. Do not open the door
during operation.
(12)
Close the cover
Make sure that no foreign objects exist
on the packing of the cover and its
contact area before closing the cover.
If any foreign object exists, the vapor
may leak from the inside.
Turn the lock lever to the left to close the cover.
Turn the lock lever to the right to open the cover.
电源接通前不能开锁
Fully close the cover and slide the lock lever on the cover to the left side. If it is closed
inappropriately, the vapor blows out from the inside, which may cause a burn injury.
Do not press the hook and operate the lock lever for purposes other than maintenance of
equipment.
(13)
Attach the droplet tray
Attach the droplet tray to the equipment
to prevent the water drops that are
made from vapor that generate during
air purge from dropping down from the
packing onto the samples or onto the
top board. Pour off the droplets inside
the tray periodically.
Droplet tray
Keep locked before
power on

13
2. Before Using
Preparation before operation
(14)
Precautions for drainage
Before draining the water, make sure that the pressure, equipment temperature and water
temperature inside the chamber have decreased sufficiently.
(15)
Precautions for continuous operation
When operating the equipment continuously after sterilization is completed, leave the
equipment for about 15 minutes with the cover opened to sufficiently lower the
temperature inside the chamber and then close the cover. If the temperature is high, the
cover may not close due to high internal pressure of chamber caused by residual steam.
Before operating the equipment, check the water level of cooling water box is lower than
water level lower limit at 1-2mm.
In case the water level of water box is above the drain level seal, drain the water until the
water level comes to the water level gauge scale.
The hot water or vapor may blow out from the cooling water box if the equipment is
operated with too much drain water (above the seal position).

14
2. Before Using
Preparation before operation
Reference data
Sterilizing operation using disposal bag for biochemically dangerous object
①Open the opening of sterilization bag so the vapor can be easily entered into
it. Secure the bag with a wire rack so it should not fall down during operation.
②The height of bag should be about two-thirds of chamber. If it is too high, the
vapor cannot be easily entered into it, or it blocks the vapor outlet at the upper
part of chamber, which may cause insufficient sterilization.
③The preset temperature should be lower than the upper temperature limit of
bag.
④The preset time varies depending on the quality and quantity of sterile samples. Refer to the
following data for the preset time.
During liquid sterilization
①If the sterilization temperature exceeds the boiling temperature of the liquid, (under atmosphere
pressure) the boiling point of the liquid should not be lower than water boiling point minus 5℃
(under atmosphere pressure, if the water boiling point is 100℃, the boiling point of the liquid
should not be lower than 95℃).
During sterilization, the liquid should be encapsulated by vessel, and its volume should not exceed
80% of the vessel (to prevent gas expansion due to boiling which may result in explosion).
Reference example of SM520 model at room temperature of 25℃
Sterile sample
Sterilization temperature
Sterilization time
Note
Gauze
121℃
30 min.
Dry gauze 2.8*3m*5
Petri dish
121℃
40 min.
30 Petri dish with a cover
The data above, however, is used as reference. The actual sterile condition varies depending on the
characteristics and quantity of samples or type of vessels to be used. Confirm the sterile condition by
using the biological indicator or chemical indicator.
The use of the sterilization test card (amlessories)
・When use the sterilization test card, please insert card in the center of the sample.
・Opeating temp.: 121 ℃(attached sterilization test card is 121 ℃)
・After the operation, please confirm the sterilization state at the sterilization test card 0000
日付
滅菌条件が完全なときには の中に
”滅菌済”が黒褐色で表示されます。
ＨＰ滅菌カード（オートクレーブ用）
SS 121-20
滅菌済
If poor sterilization, shallow dark brown 灭菌済 is
ahown in 000000
日付
滅菌条件が完全なときには の中に
”滅菌済”が黒褐色で表示されます。
ＨＰ滅菌カード（オートクレーブ用）
SS 121-20
滅菌済
If normal sterilization, clear dark brown 灭菌済 is
ahown in 000000
Sterilization
bag

15
2. Before Using
Preparation before operation
Time lag
a
b c
℃
Time① ② ③ ④
a= Preset sterilization time
b= Time lag
c= sterilization time defined by the
Japanese Pharmacopoeia
Temperature inside the chamber
Saturated
vapor
temperature
Water temperature
・Preset sterilization temperature:121℃
・Room temperature: 25℃(using conical flask)
When sterilizing liquid samples, a time lag (b) is made between the
temperature inside the chamber and actual temperature of liquid by
the time when the liquid temperature reaches the preset sterilization
temperature. For this reason, a longer time than defined by the
Japanese Pharmacopoeia (c) is required to completely sterilize the
samples. Consequently, the actual preset sterilization time (a) should
be set to be extended
The right table shows the time lag between the temperature inside
the chamber and actual temperature of liquid (water). The table
below shows the temperature rise and cooling time with no load
(liquid).
Time lag
Load
SM520/820
500ml
12min.
1000ml
15min.
2000ml
16min.
3000ml
20min.
4000ml
25min.
5000ml
30min.

16
3. Description and Function of Each Part
Main unit (front·top·back)
Front · top
Back
Packing
Handle
Cover
Cover lock hook
ELB
Pressure
gauge
Rating notice sticker
Cover lock lever
Heat outlet
Droplet tray
Door
Water level
observation window
for colling water box
Intake of
condensation fan
Top board
Intake of forced cooling
fan
Cooling
water box
Power cord
Drain
valve
External output
terminal
(optional)
Caster
Operation panel
of touch screen
Heat outlet
Water/gas
outlet
Heat releasing outlet

17
3. Description and Function of Each Part
Main unit (internal structure)
Electric
distribution box
Cylinder
Exhaust solenoid valve
(V1)
(full open)
Exhaust solenoid valve
(V2)
(slow down air exhaust)
Forced cooling
fan
Idling protector
Pressure-head
switch
Drain solenoid
valve
Water/gas
outlet
Rear
Safety lock
Cylinder temp.
sensor
Auxiliary exhaust
valve
Safety valve
Pipe joint of
pressure switch
Rear