Yamato DKM300C User manual

Forced Convection Constant
Temperature Oven
Model: DKM300C/400C/600C
DKM310C/410C/610C
Yamato Scientific America Inc.
Thank you for purchasing "Forced Convection
Constant Temperature Oven, DKMC Series" of
Yamato Scientific Co., Ltd.
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.
- First Edition -

Table of Contents
1. Safety precautions........................................................................................................................................ 1
Explanation of pictograms..............................................................................................................................1
List of symbols................................................................................................................................................. 2
Warning ・Cautions....................................................................................................................................... 3
2. Before operating the unit............................................................................................................................ 4
Precautions when installing the unit.............................................................................................................4
Installation procedures ・precautions........................................................................................................ 7
3. Names and functions of parts................................................................................................................. 10
Main body....................................................................................................................................................... 10
Operation panel............................................................................................................................................. 11
Explanation of characters............................................................................................................................ 12
4. Operating procedures................................................................................................................................ 13
List of operation modes and functions.......................................................................................................13
Operation mode ・function setting keys and characters...................................................................... 15
Operating procedures (settings for overheat prevention device)..........................................................16
Operating procedures (fixed temperature operation)..............................................................................17
Operating procedures (quick auto stop operation)..................................................................................18
Operating procedures (auto stop operation)............................................................................................ 20
Operating procedures (auto start operation)............................................................................................ 22
Useful functions (calibration offset function).............................................................................................24
Useful function (setting lock function)........................................................................................................25
Useful function (power outage compensation function)......................................................................... 26
5. Cautions on handling................................................................................................................................. 27
6. Maintenance procedures...........................................................................................................................30
Daily inspection/maintenance..................................................................................................................... 30
7. When the unit is not to be used for a long time or when disposing.............................................31
When the unit is not to be used for a long time or when disposing......................................................31
Notes about disposition................................................................................................................................31
8. Troubleshooting...........................................................................................................................................32
Safety device and error codes.................................................................................................................... 32
When a malfunction is suspected...............................................................................................................33
9. After sales service and warranty............................................................................................................ 34
When requesting a repair............................................................................................................................ 34
10. Specifications.............................................................................................................................................35
11. Wiring diagram...........................................................................................................................................36
12. List of replacement parts........................................................................................................................ 36
13. List of dangerous materials................................................................................................................... 39
14. Standard installation manual.................................................................................................................40

1
1. Safety precautions
Explanation of pictograms
A variety of pictograms are indicated in this operating instruction and on products to assure
safe operation. Possible results from improper operation ignoring them are classified as
follows.
Be sure to fully understand the descriptions below before proceeding to the text.
Warning Indicates a situation which may result in death or serious injury
(Note 1)
Caution Indicates a situation which may result in minor injury (Note 2) and
property damage (Note 3).
(Note 1) Serious injury means a wound, an electrical shock, a bone fracture or intoxication
that may leave after effects or require hospitalization or outpatient visits for a long
time.
(Note 2) Minor injury means a wound or an electrical shock that does not require
hospitalization or outpatient visits for a long time.
(Note 3) Property damage means damage to facilities, devices and buildings or other
properties.
This pictogram indicates a matter that encourages the user to adhere to
warning (“caution” included).
Specific description of warning is indicated near this pictogram.
This pictogram indicates prohibitions
Specific prohibition is indicated near this pictogram.
This pictogram indicates matters that the user must perform.
Specific instruction is indicated near this pictogram.
About pictograms
Meanings of pictograms

2
1. Safety precautions
List of symbols
Warning
General warnings
Danger!:
High voltage
Danger!:
High temperature
Danger!:
Moving part
Danger!: Hazard
of explosion
Caution
General cautions Electrical shock! Burning!
Caution for no
liquid heating!
Caution for water
leak!
For water only
Poisonous
material
Prohibitions
General bans Fire ban
Do not
disassemble
Do not touch
Compulsions
General
compulsions
Connect ground
wire
Install levelly
Pull out the power
plug
Regular
inspection

3
1. Safety precautions
Warning ・Cautions
Warning
Never operate the unit in an atmosphere containing flammable or explosive gas
Never operate the unit in an atmosphere containing flammable or explosive gas.
Otherwise, an explosion or a fire may result since the unit is not explosion-proof.
See section “13. List of dangerous materials” on page 39.
Be sure to connect the ground wire.
Be sure to connect the ground wire correctly. Otherwise, electrical leak may result and cause
an electrical shock or a fire.
Ban on operation when an abnormality occurs
When a smoke or a unusual odor is seen or sensed, immediately turn the ground fault interrupter
on the main unit off and pull out the power plug. A fire or an electrical shock may result.
Never use electrical power cords bundled.
When these are used bundled, they might overheat causing a fire.
Take care not to damage electrical power cords.
Avoid tightly bend, pull with a strong force or twist to prevent electrical power cords from
damaging. A fire or an electrical shock may result.
Never use an explosive or a flammable material with this unit.
Never use an explosive material, a flammable material or a material containing them. An
explosion or an electrical shock may result.
See section “13. List of dangerous materials” on page 39.
Never try to touch a hot part.
Some parts of the unit are hot during and immediately after operation. Take special care for
possible burning.
Never try to disassemble or alter the unit.
Never try to disassemble or alter the unit. A malfunction, a fire or an electrical shock may result.
Caution
When a thunder is heard.
When a thunder is heard, turn the main power off immediately. A malfunction, fire or an
electrical shock may result.

4
2. Before operating the unit
Precautions when installing the unit
1. Carefully select an installation site.
Take special care not to install the unit at a place described below:
・Uneven surfaces or dirty surfaces
・Where flammable gas or corrosive gas exists
・Where the ambient temperature is 35℃or more
・Where temperature changes severely
・Where humidity is high
・Where subject to direct sunlight
・Where vibration is severe
Secure minimum spaces as shown below around the unit.
15 cm
or more 15 cm
or more
Front
15 cm or more
1m or more
2. Install the unit on a level surface.
Flat
Install the unit on a level surface. If the whole bottom surface of the unit does not contact
the surface evenly, vibrations or noises may result. This might cause unexpected troubles
or malfunctions.
Weight of the unit are: Model DKM300C/310C:approx 35 kg;Model DKM400C/410C:approx
50 kg;Model DKM600C/610C:approx 65 kg, When lifting the unit for transportation and
installation, carefully handle it by at least two people.
3. Installation
The unit might fall down or move by an earthquake or an impact resulting a personal injury.
We recommend to make safety measures such as to avoid installing the unit at a place other
than busy places.

5
2. Before operating the unit
Precautions when installing the unit
4. Assure sufficient ventilation for the unit.
Do not operate the unit when its vent holes on the side and rear panels covered or blocked.
Internal temperature of the unit will rise degrading the performance and an accident, a
malfunction or a fire may result.
5. Do not operate the unit at such a place that may subject to splash.
Do not operate the unit at such a place that may subject to splash. Liquid entering the
inside may cause an accident, a malfunction, an electrical shock or a fire.
6. Never operate the unit in an atmosphere containing flammable or explosive gas.
Never operate the unit in an atmosphere containing flammable or explosive gas. Since the
unit is not explosion-proof, an arc is discharged when switching the circuit breaker
interrupter “ON” and “OFF” and during operation and a fire or an explosion may result.
See the section “13. List of dangerous materials” on page 39 for flammable and explosive
gases.
Explosive gas
Combustible gas

6
2. Before operating the unit
Precautions when installing the unit
7. Be sure to connect the power plug to the dedicated power distribution panel or
a wall outlet.
Choose a correct power distribution board or receptacle that meets the unit’s rated electric
capacity.
Electrical capacity:
DKM300C AC115V 7.5A
DKM400C AC115V 11A
DKM600C AC115V 12A
DKM310C AC220V 4.5A
DKM410C AC220V 6.5A
DKM610C AC220V 7A
NOTE:
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. Please consult your dealer or a local electrical
contractor for the connection of devices that use a single-phase 220V power source.
Do not connect the unit to any parts or lines other than a correct power supply line such as a
gas pipe, a water pipe or a telephone line.
Otherwise, an accident or a malfunction may result.
8. Handling of a power cord
Never use electrical power cords bundled. When these are used bundled, they might
overheat causing a fire.
Never alter, forcibly bend, twist or pull the power cord. Otherwise, a fire or an
electrical shock may result.
Do not put the power cord under a desk, a chair or between some objects to avoid
damaging it. Otherwise, a fire or an electrical shock may result.
Do not place the power cord close to a stove or other heat generating device.
Sheath of the cord may burn and result in a fire or an electrical shock.
If the power cord should be damaged (exposure of core wire or disconnection), immediately
turn the MCB on the main body, turn the source power off and ask your dealer to replace the
cord. Operating the unit with a damaged power cord may cause a fire or an electrical shock.
Be sure to connect the power cord to a correct wall outlet.

7
2. Before operating the unit
Installation procedures ・precautions
(1) Select an installation site.
・Make sure that all of four legs are securely on a flat surface.
(2)
Install shelf boards.
・The lowest shelf board has been secured with screws at the time of shipping from the
factory.
・Install shelf pegs at heights you want on the right and left shelf posts in the internal bath of
the main body.
・Completely push shelf boards by sliding to the end.
*Take care to put each shelf board on correct pairs of right and left shelf pegs.
・Make sure that shelf boards will not fall nor rattle.
・Withstand load of each shelf board is 15 kg in even loading. When putting samples,
arrange them as dispersed as possible.
Shelf pillar
Screw
Screw
Shelf board
Flow
adjusting
plate
Clamp
Shelf board
Sample
15 kg

8
2. Before operating the unit
Installation procedures ・precautions
・Put samples with spaces between them. Too many samples may prevent proper
temperature control. To assure proper temperature control, put samples with a space at
least 30% of the shelf board area.
Make at least 30% of space
(3)
Do not put a sample on the bottom of the internal bath.
・Operating the unit with a sample directly put on the bottom of the internal bath might
degrade its temperature characteristics. This also may cause corrosion, damage or rust
of the internal bath. Never put any sample on the bottom surface.
・When putting samples, take care not to allow them touching the wall, where sensor or other
devices are installed. Put samples on the shelf board included with the unit.
(4) Take special care for samples shown below:
(1) Samples that contain flammable or explosive components
・The unit is not explosion proof. Never attempt to dry or process materials that
contain flammable or explosive components.
(2) Corrosive samples
・Take care for handling of corrosive samples. Although SUS304 stainless steel is
used for major components, note that they might corrode with strong acid. Note that
packing may corrode with acid, alkali, oil or organic solvents.
(5)
Always operate the unit with the vent holes open.
・There are two vent holes on the top surface of the unit. In regular operation, open both of
two vent holes. Adjust their opening level according to the water amount contained in a
specific sample.
Note that high temperature steam may be blowing out of the vent
holes.
To prevent a burn, never try to look into the vent holes or touch
those parts with bare hands.
(6)
Always shut the door completely.
・Make sure that the clamp on the right side of the door is completely locked before operating
the unit.