Drawell TANK User manual

User’s Manual V1.0
Contents
I. SUMMARY………………………………………………………………………1
II. TECHICAL PARAMETERS……………………………………………………3
III. COMPONENTS AND FUNCTIONS…………………………………………4
IV. INSTRUCTIONS OF DIGESTION TANK………………………………….17
V. OPERATING STEPS……………………………………………...………….25
VI.NOTES.………………………………………………………………………..26
VII.ROUTINE MAINTENANCE OF EQUIPMENT AND COMPONENT……28
VIII. COMMON FAULTS AND TREATMENT METHOD……………………...29

User’s Manual V1.0
Warning: The instrument can not provide the designed
protection for operators who do not follow the right procedures and
requirements given by the manufacturer.
Warning: All solutions must be handled with care according to
the lab’s safety regulation. Please make a reference to the related
material safety data sheet. Wear the lab-gown, goggle and rubber
gloves all the time. Be care of hot reagents.
Warning: Be aware of the risk of electric shock. Only the
trained professionals are permitted to open the face panel or back
cover.

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I. Summary
Thank you for your purchasing and using of TANK Microwave
Digestion System. We appreciate your trust and will try our best to
serve you.
As a kind of sample pretreatment technology, microwave digestion
emerged in the middle of 1980s. Since the advantages of fast
heating rate, homogeneous heating, low blank and energy saving,
microwave digestion has been widely used in the heavy metal
element analysis of foodstuffs, environmental samples, human body
or animal samples, agricultural products, Chinese herbal medicine
samples, textiles, alloy, cosmetics and mineral samples.
Adopting double magnetrons of industrial grade and non pulse
frequency conversion control technology, TANK Microwave
Digestion System achieves rapid and complete digestion of
inorganic or organic samples under the condition of high
temperature and high press. Fiber optic sensor (FOS) guarantees
real-time feedback of temperature and pressure acts as the
monitoring index. Besides, other safety measures are adopted to
guarantee the system’s safe and steady operation.(This manual
applies to model PRO、Basic、ECO )
Characteristics of TANK Microwave Digestion System
1. Steady and efficient digestion capability
2. More humanized operation interface
3. Reliable performance
4. High security
Service Environment
1. Keep away from heat source and avoid hot gas and vapour
entering the system lest causing stoppage. Besides, stay away from
water source to avoid leakage caused by splash.
2. Place it on a firm and stable table. The experiment table shall be
vibration-free and has the ability to bear 75kg at least. No cover on

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the left and the right sides of the furnace body, as well as the
top.More than 50cm’s interspace (30cm in back wall) shall be left to
keep good ventilation.
3.Keep away from strong magnetic material and electrical appliance
with magnetism to avoid heating efficiency reduction caused by
magnetic field interference inside of the furnace.
4.Power supply is AC 220V/50Hz. Earth connection shall be
confirmed by wireman since imperfect earth connection may cause
machine breakdown. Earth resistance is less than 4 ohm.
Independent regulated power supply over 4000W shall be equipped,
with the voltage fluctuation less than 10V.
5.Be close to fuming cupboard and other ventilating devices.
6.The required operating temperature is 0 ℃ ～ 40 ℃and the
humidity 10～85%. The best operating temperature is 20℃ ～ 25℃
and the humidity 40～60%.
7.Install exhaust duct before using.
Open-package inspection
1．Seal off the transport case carefully.
Notes: keep instrument packing cases for later transportation.
2．Lift up the instrument with at least two persons and place it on the
experiment table. Check instrument and its components according
to packing list. Please contact retailer or manufacturer if there are
any mistakes, incomplete or abnormal components.
Special Warning
1. Please read this manual carefully for safety and smooth
experiment. When the user is not familiar with similar instrument,
foundation training is required.
2. The actual number of digestion tank shall consist with the set
value of digestion program. Error shall be less than 2 tanks.
3. Perchloric acid is prohibited using digest samples
4. Observe the temperature variation carefully when using
concentrated sulfuric acid to digest samples.

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5. Digestion of flammable and explosive material is prohibited. (refer
to Notes)
6. Dry running is prohibited.
7. Safekeeping the manual and transfer it if operator changes.
8. The company reserves the right of product upgrade and changes
the manual content without notice.
II. Technical Parameters
Power supply: 220V AC/ 50Hz
Microwave power: Double magnetron with maximum microwave
output power of 1600W
Microwave power control: Full scale non pulse frequency
conversion control
Microwave frequency: 2450MHz
Volume of furnace chamber: 48L
Material of furnace chamber: Industrial furnace chamber with
corrosion resistant coating
Rotor speed: 7 rpm
System control: UCOS-Ⅱoperating system
Input control: Input of touch screen
Measurement range of temperature sensor: PRO:-40-305 ℃
/Basic：0-305℃/ECO:Room Temperature-350℃, precision±1℃
Measurement range of pressure sensor: 0-7 MPa,
precision±0.01MPa
Video display:5 inch color LCD display the internal image (only
PRO type)
Remote control：By the WIFI controlled by PC (only PRO type)
Turnplate design: Axial symmetrical absolutely. Rotate forward and
backward.
Maximum working pressure: 800 PSI (about5.5MPa)
Exhaust system: 3.6m³/min

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Dimensions: 600mm×685mm×660mm (W×D×H)
Weight: 62kg
III. Components and functions
1. Components
Figure 1.1 Front view of TANK
LCD color 5 inch screen -- Displaying internal image
LCD color 7-inch touch screen——Displaying menu, method
parameters and instrument status by touch operating
Lock of safety door——Switch of safety door
Safety door——Guarantee the seal between door and microwave
reaction chamber and prevent microwave leakage
Observation window——Observe status inside of chamber after
closing safety door
Switch——turn on or turn off the instruments

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Figure 1.2 Back view of TANK
Socket of power supply——Connect power line of standard
configuration
Switch of power supply——Switch on and switch off the power
supply
Communication interface——Connect communication tools like
computers
Air intake——Provide air for chamber to exhaust gas inside of
chamber
Cooling fan——Cool the important working components
Air outlet——Connect exhaust duct and react exhaust gallery of
gases inside of chamber
Protect cover——Removable(protect the interface)
Antenna——for WIFI control(TANK PRO only)
Fuse base—— two Fuse installed(15A)

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2. Functions
2.1 Initial Interface
As shown in Figure 2.1, the Welcome Interface appears after
starting up. “Microwave Digestion System” lies at left bottom corner.
The system turn to “Function” interface after finishing self-checking.
Figure 2.1
2.2 Function interface
Function Interface includes four functions: Run, Edit, Setup and
Help, as shown in Figure 2.2.
Figure 2.2

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2.3 Run
2.3.1System Methods Interface
Click “Run” on the Function Interface and enter System Method
Interface, just as shown in Figure 2.3.1. Click arrow mark to seek for
the needed digestion method. It shows as white characters on black
background when selected. Click “View” to enter View Interface.
Click “switch” to User Methods. Click rotary arrow to rotate the
turnplate and click it again to stop rotating so as to adjust digestion
tank. After clicking “OK”, the system starts to heat and the heating
interface appear. Click “Back” and it returns to Function Interface
directly, just as shown in Figure 2.2.
Figure 2.3.1
2.3.2 User Methods Interface
Click “switch” on the System Methods Interface (Figure 2.3.1) and
enter User Methods, just as shown in Figure 2.3.2.

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Figure 2.3.2
2.3.3 Methods View Interface
On the System Methods Interface (Figure 2.3.1) or User Methods
(Figure 2.3.2), select the needed method and click “View” to enter
Methods View Interface. Just as shown in Figure 2.3.3, We can
know about detailed programs of selected method, including ramp
time, pressure, temperature and hold time etc. Select “Run” to enter
Heating Interface and click “Back” to return to the last interface.
Figure 2.3.3

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2.3.4 Heating Interface
Just as shown in Figure 2.3.1 and Figure 2.3.2, click “OK” on
Methods Interface or select “Run” on Methods View Interface
(Figure 2.3.3) to enter Heating Interface, just shown in Figure 2.3.4.
The real-time process of program is shown in program list and the
current temperature and pressure are shown at left bottom corner,
with the green prompt word of “Heating”. After the experiment
finished, the system click for three times and the words “digestion
completed, cooling now” will appear under “Current Pressure”, with
the flickering prompt.
Figure 2.3.4
Click “Pause” and the system will suspend microwave emission,
with the red words of “Suspend Heating” showing at bottom left
corner. Click “Stop” and the system will stop emitting microwave,
with the words “Digestion Completed, Cooling Now” showing at left
bottom corner. The draught fan will stop rotating if the temperature
drops below 80 ℃. Select “Switch” during the heating process to
enter Curve Interface of Temperature and Pressure. We can know
changes of temperature and pressure during the whole heating
process. The words shown at left bottom corner is the same as that
of Heating Interface, just as shown in Figure 2.3.5. Click “Back” to
return to Function Interface directly.

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Figure 2.3.5
Select “Switch” on Curve Interface to enter Heating Interface (Figure
2.3.4). The functions of other keys are the same as those of Heating
Interface.
2.4 Edit
As shown in Figure 2.4.1, click “Edit” on Function Interface and enter
User Methods Interface.
Figure 2.4.1
You can select, view, add and delete on the interface. Click “View” to
enter User Methods Interface (Figure 2.4.2) and to view the
information of former edit program (notes: You can only view here. If
you want to operate the program, please refer to the operation steps

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in 2.3.). If you want to delete one method, select it and click “Delete”.
Click “Back” to return to the interface shown in Figure 2.4.1.
Figure 2.4.2
Click “Add” if you want to edit method by yourself, and enter
Program Input Interface, just as shown in 2.4.3. Click each data
area and set each parameter through bottom numeric keyboard
(notes: The setting vessels shall consist with the digested vessels,
or the magnetron may burn out.).
Notes: vessel number is not more than to 12; ramp time is not
longer than 20 minutes; pressure do not exceed 800PSI;
temperature is not higher 250℃and hold time is not longer than 20
minutes.

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Figure 2.4.3
Click “Back” to return to interface shown in Figure 2.4.1 and the
input parameters will not be saved. After finishing parameter setting,
click “OK” and enter Name Edit Interface, just as shown in Figure
2.4.4. Input a name easy to distinguish through keyboard (For
example, 2-PE-190 means 2 tanks polyethylene sample digested at
190℃). The longest name is 20 characters. Click “OK” to save the
name and the interface will return to the one shown in Figure 2.4.1.
Click “Back” to cancel editing and the interface will return to the one
shown in Figure 2.4.3.
Figure 2.4.4

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2.5 Setup
Click “Setup” on Function Interface to enter the Setup Interface
where you can set system time and communication port. (Basic type
and ECO type have no communication settings)As shown in Figure
2.5, click “OK” to save and select “Back” to return to Function
Interface directly.
Figure 2.5
2.6 Help
In function interface, click [Help] button to enter help interface as
shown in Figure 2.6.1.
Figure 2.6.1

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Select “OK” on Help Interface to return to Function Interface. As
shown in Figure 2.6.2, click “Instruction” and enter Instruction
Interface, where the notes of the system are introduced. Click
“Back” to return to Help Interface.

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Figure 2.6.2
2.7 Alarm Prompt
2.7.1 Prompt of door open
If the door is opened or not been fastened tightly, the prompt shown
in 2.7.1 will appear and the next operation will be prohibited. You
can only operate by clicking turnplate rotating key on System
Methods Interface (refer to Figure 2.3.1). The prompt will disappear
when the door is closed.
Figure 2.7.1
2.7.2 Prompt of COT abnormal
The system will stop working automatically if there is an abnormal
sound in the furnace chamber and the prompt window will appear to
guarantee the safety of experiment, just as shown in 2.7.2. Please
check the reason of abnormal sound and eliminate potential safety
hazard. （ECO type without this feature）Click any key to start after
confirming the safety.

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Figure 2.7.2
2.7.3 Prompt of temperature sensor fault
(1) If the joint of temperature sensor is not inserted properly or
temperature sensor is not installed, the following interface will
appear. The system will not continue under such condition and all
the interface operation will be prohibited until the fault is eliminated.
Figure 2.7.3-1
(2) If the temperature sensor dose not detect temperature change
for a long time (more than 2 minutes), the prompt interface shown in
2.7.3-2 will appear. Please check whether temperature sensor is
inserted into the bottom of temperature drivepipe of reaction tank.
Figure 2.7.3-2
2.7.4 Prompt of voltage fault
If the power voltage exceeds allowed limits, the following alarm will
appear and all the operation will stop until the voltage return to
normal.

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Figure 2.7.4
2.7.5 Prompt of station sensor fault
After turning on the power switch, the program will initialize and
check position sensor automatically. If the program fails to check
position sensor, the following prompt will appear to prevent the
turnplate from continuously rotating at one direction, or the optical
temperature sensor or pressure pipe will be damaged. All the
operation shall be prohibited if this fault occurs. Please wait for
after-sales personnel to solve this problem.
Figure 2.7.5
IV. Instructions of Digestion Tank
1. Parts of control tank

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Fig. 3.1 Schematic diagram of control tank
2. Assembly and connection procedures of control tank
1. the nut hole at the bottom of the tank cap and tighten it. Hold the
tank cap and shake gently the OFT to make sure it is tightened
properly without any sign of getting loose, or otherwise air leakage
will be caused.
2. Prepare a sample and put it into the inner tank. The sample must
be placed at the bottom of the inner tank to make sure it can be
completely submerged in acid. No sample shall be left on the inner
wall of the inner tank.
3. Add acid solution into the inner tank to make sure the sample is
submerged totally in acid. If there is any violent reaction, the tank
shall not be capped until the reaction quiets down.
Note: For the sample with unknown components, the sample easy
to be oxidized, and highly active organics such as alcohol, ketone
and glycols, it is necessary to leave the tank open for 15 min. for
pre-digestion.
4. Cover the inner tank with its cap and then top the brown elastic
sheet onto the tank cap.
Note: There is a small hole in the center of the control tank cap and
a connector used to connect pressure pipe near the vent valve. DO
NOT mix it with the standard tank.