Charmhigh BRTRO-420 User manual

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BRTRO-420
Drawer Type Reflow Oven Operating Manual
V1.07

I
Contents
Contents .............................................................................................................................................I
1. Preface ..............................................................................................................................- 1 -
2. Precaution .........................................................................................................................- 1 -
3. Features.............................................................................................................................- 2 -
4. Performance......................................................................................................................- 2 -
5. Profile Introduction ...........................................................................................................- 2 -
6. Operation ..........................................................................................................................- 3 -
6.1. Power On...............................................................................................................- 3 -
6.2. Screen Element .....................................................................................................- 4 -
6.3. Use of Buttons.......................................................................................................- 4 -
6.4. Menu Page ............................................................................................................- 5 -
6.5. Edit Page................................................................................................................- 5 -
6.6. Reflow Curve .........................................................................................................- 7 -
6.7. Run Page................................................................................................................- 9 -
7. Preset Curve ................................................................................................................... - 10 -
8. Customer Service ........................................................................................................... - 11 -

BRTRO-420 Drawer Type Reflow Oven Operating Manual
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1. Preface
Dear customer, welcome to use our machine.
This manual details the use of the machine, including safety precautions,
performance parameters, and parameter setting method. Spend a little time reading
this manual before formal production, will help you to produce high quality circuit
board safely and efficiently according to your needs.
If there is any problem in using, welcome to contact us. Your satisfaction is our
satisfaction; your success is our success.
2. Precaution
Too high or too low voltage may cause machine work properly, or damage
machine’s electrical control system;
Please do not disassemble, because it can lead to electric shock or poor heat
insulation;
Must use the power cord attached to the machine, the power cord that is
not up to the rated power requirements may cause overheat, even cause
fire;
Keep the machine away from flammable and explosive goods;
Keep the machine clean and ventilated, especially in the back of the
machine, keep at least 20cm of space, to ensure good heat dissipation and
welding effect;
The waste gas from the chimney needs to be collected and processed when
machine running, direct discharge may cause damage to the body, and
cause pollution to the environment;
The waste gas discharged from the chimney and the chimney itself has a
high temperature, rush contact has a risk of being scalded;
Pay attention to prevent waste heat of the drawer when operating.

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3. Features
Hot air and infrared heating, heat evenly, short period;
8 Curves are optional, production is flexibility;
Curve adjustment simple, just need adjust a few parameters, the machine
can generate curves automatically and show it directly;
Built in PID controller, high control accuracy;
Drawer window design(optional), adjust convenient;
High life heating tube;
Double sensor temperature measurement;
Use iron double ball fan, high temperature resistance, high life;
Full stainless steel chamber;
Close thermal insulation;
Industrial grade display and control circuit;
Simple, intuitive and efficient human-machine interface design.
4. Performance
Item
Parameter
Remark
Outline Dimension
L 405mm W 420mm H 255mm
Net Weight
20kg
Rated Power
2500W
Peak Power
Rated Voltage
220V/60Hz
Drawer Area
300mm×300mm
Solder Type
Lead/Lead-free
Max. Temperature
300°C
Heating Mode
Hot Air and Infrared
Temperature Control Precision
±1°C
Constant Temperature
Production cycle
5～10min
Curve Number
8
5. Profile Introduction
Machine profile is shown as below.

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Chimney
Observation
Window
Button
Screen
Pilot
Lamp
Air
Intake(Back) Power
Switch(Side)
Air Intake: At the back of the machine, used for inhaling cold air to cooling
chamber, need to keep ventilation;
Chimney: Used to discharge waste gas, must pay attention to high
temperature;
Pilot Lamp: There 3 lights altogether, ‘Heat’ light said chamber is heating,
‘Cool’ light said machine is cooling, and ‘Run’ light said machine is running;
Observation Window(optional): Used to observe circuit board in the
machine when welding;
Power Switch: Machine power switch;
Button 、Screen: Used to operate machine, see below for detailed
description.
6. Operation
6.1. Power On
Turn on the power switch, then the buzzer in the machine will give out a long

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ringing, and the screen display as shown below, means that the machine starts OK,
then machine will enter the ‘Menu’ page automatically.
BRTRO-420
Welcom 欢迎使用
百瑞通|Brighten V1.06
Current firmware version was displayed on the bottom right corner of the
screen.
6.2. Screen Element
Before introducing specific screen page, first introduce the classification of
different elements on the screen, in fact, knowing the type of a screen element, then
know how to operate it, see following table, screen elements are simply divided into
three types.
Type
Description
Display Terms
Display fixed message or real-time data, however, it’s can not be framed and to
be operated
Function Terms
Display function name, can be framed and be selected to perform a specific
function
Parameter Terms
Display parameter values, can be framed and be selected to adjust values
Users are able to operate “function”and “parameter”types of screen elements,
two operating states are shown as below.
State
Description
Framed
The elements on the screen are occupied by a box, indicates that the current
element is selected, but can not be adjusted or perform the corresponding
functions
Selected
The screen elements are highlighted, indicates that the current element can
be modified at any time
6.3. Use of Buttons
All the operations are implemented through four buttons on the operation panel,
see the table below for details.

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Button
Name
Description
Upward
When no element is selected on the screen, it is used to move the
selected box up; and when an element is selected on the screen, it is
used to adjust the value of the selected element
Downward
Just be opposite of the above
Confirm
Used to switch the framed parameter to selected state, or perform the
framed function
Return
Used to switch the parameter in selected state back to framed state, or
return to the upper page
The buzzer will short sound as confirmation when buttons that are able to
function currently action. Moreover, some parameters can be adjusted quickly by
long press.
6.4. Menu Page
Screen is shown as below.
MENU Cur1
220°C
21.5°C
183°C
06:05
Run
Edit
Descriptions of the elements on the screen are shown in the following table.
Item
Type
Description
Remark
MENU
Display
Indicates that the current screen is
menu page
21.5°C
Display
Current temperature
Cur1
Display
Current selected curve
220°C
Display
Max. temperature of the curve
183°C
Display
The melting point of the solder
paste
Only for reference, no control
function is given
06：05
Display
Total running time
Curve
Display
Shape of curve
Edit
Function
Select to enter edit page
Run
Function
Select to enter run page and start
running
6.5. Edit Page

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Edit page is used to select and edit curves.
EDIT Cur1
PreHt
50.3°C
100°C
48s
Save
S1.0
Item
Type
Description
EDIT
Display
Indicates that the current screen is edit page
50.3°C
Display
Current temperature
Cur1
Parameter
Select the curve, different curve contain a set of completely
independent parameters
PreHt
Parameter
Select section of the curve, for example, the current selection is the
preheating section of curve, the three parameters below will change
with different value of this parameter
100°C
Parameter
Target temperature of preheating section
48s
Parameter
Length of preheating section
S1.0
Display
Temperature change rate of preheating section, 1.0 said that the
temperature increased by 1°C per second
Save
Function
There has an ‘*’if there are parameters are modified but not saved,
select to save the modified parameters and the ‘*’ will disappear at
the same time; Note, even if the parameters are not saved, the
machine will run with new parameters until the power is off
Curve
Display
The shape of current curve, it changes with the change of the
parameters of curve
From above, it is obvious that the parameters in section will change along with the selection
of different sections. All of these changes are listed below. The values of the parameters in the
table are just examples.
Section
Name
Parameter
Type
Description
PreHt
Preheat
100°C
Parameter
Target temperature of preheating. The start
temperature of preheating is the target temperature of
cooling, taking the parameters in the table as example,
temperature will be changed from 50°C to 100°C in
preheating section
48s
Parameter
Time of preheating section
S1.0
Display
Temperature change rate of preheating section
Heat
Heat
150°C
Parameter
Target temperature of heating, The start temperature
of heating is the target temperature of preheating,
taking the parameters in the table as example,
temperature will be changed from 100°C to 150°C in

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heating section
100s
Parameter
Time of heating section
S0.5
Display
Temperature change rate of heating section
Ref
Reflow
220°C
Parameter
Target temperature of reflowing, this parameter
determines the maximum temperature of curve. The
start temperature of reflowing is the target
temperature of heating, taking the parameters in the
table as example, temperature will be changed from
150°C to 220°C in reflowing section
60s
Parameter
Time of reflowing section
S1.2
Display
Temperature change rate of reflowing section
RefKp
Reflow Keep
15s
Parameter
Time of keeping max. temperature
Cool
Cool
50°C
Parameter
Target temperature of cooling, this parameter
determines the minimum temperature of curve. The
start temperature of cooling is the target temperature
of reflowing, taking the parameters in the table as
example, temperature will be changed from 220°C to
50°C in cooling section
140s
Parameter
Time of cooling section
S-1.2
Display
Temperature change rate of cooling section, note that
this value is negative
Melt
Melt
183°C
Parameter
Melting temperature of solder paste, only for
reference
77s
Display
The time that solder paste endured above melting
point, this parameter will change automatically when
the other parameters are changed
Note that the temperature in the table can not be lower than the target
temperature of previous or higher than the following.
6.6. Reflow Curve
The parameters editing of reflowing curve is introduced above, the figure below
shows a complete reflowing curve.

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It is very important that a suitable reflowing curve is a guarantee of good
welding quality. However, Adjust reflowing curve will become very simple as long
as you have got the right method. The method is generally divided into the
following three steps.
Check the reference manual of solder paste, set the initial curve according to
the instructions in the manual;
Adjust the curve according to the maximum acceptable temperature of the
components, so as to prevent damage to the components in welding process
by high temperature;
Take actual welding test, and adjust curve according to the welding effect.
The function of each section and the points for attention of reflowing curve are
introduced below, in addition, a detailed description can be found in the manual of
solder paste.
PreHt: Preheating section, used for rapid heating, heat the circuit board to
the temperature of solder paste to start work, the target temperature of this
section should not be set too high, and heating time not too long.
Temperature too high or time too long is the main reason of solder paste
collapse, tiny balls around the pads, solder sticking together;
Heat: Heating section, this section mainly makes the temperature to the
same on circuit board, and the flux in solder paste begins to work at the
same time. The temperature rise rate of this section is smaller than the
previous, and the curve looks slower too, but if the temperature is too high

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or time is too long, will cause flux volatile prematurely, and then lead to
oxidation and poor wetting;
Ref: Reflowing section, this section is mainly used to melt the solder paste,
it’s a key step in welding, temperature rise rate is greater than the previous,
too high temperature and too long time will lead to oxidation and impact of
components on circuit board;
RefKp: Reflowing keep section, used to set the time to maintain the
maximum temperature for full of flux volatile and solder flow;
Cool: Cooling section, mainly used to reduce the temperature of the circuit
board smoothly, solder will be re-solidified in this process, it is worth
mentioning that the cooling process also has a great impact on the welding
effect, too fast or too slow cooling process will produce pale and lightless
solder beads, what is worse, there may be potential defects;
Melt: Melting point, in fact, the solder paste has strict requirements on time
that the temperature above the melting point.
6.7. Run Page
Select ‘Run’ at the menu page to enter page as below, the buzzer will give out a
long ringing, once entering the run page, machine start run the reflowing curve.
Run Cur1
03:25
219.5°C
56%
220°C
Item
Type
Description
Run
Display
Indicates that the current screen is run page
219.5°C
Display
Current temperature
Cur1
Display
Current selected curve
03:25
Display
Run time
56%
Display
Percentage of completed
220°C
Display
Theoretical temperature
Curve
Display
Actually measured curve

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Buzzer will long sound interval after completion, machine will stop running and
go back to menu page automatically until the temperature drops below the cooling
temperature. Of course, user can also end this running directly by press return
button.
Note, the stainless steel will absorb heat in cold start, and lead to temperature
rise slow, so it is suggested that running one time without load for preheating
before production. On the other hand, it appears that running has been completed
but the temperature has not been completely down. Even so, the two cases are
occurred below the temperature of solder paste working due to the careful design,
therefore, it will not affect the effect of welding.
7. Preset Curve
Two sets of curves have been preset to facilitate users to setup, No. 1～4 are
lead curves, No. 5～8 are lead-free curves, users have to adjust them according to
the actual needs, parameters are listed as below for reference.
Lead, total run time 6 min. 5 sec.
Section
Parameter
PreHt
100°C
50s
S1.0
Heat
150°C
100s
S0.5
Ref
220°C
60s
S1.2
RefKp
15s
Cool
50°C
140s
S-1.2
Melt
183°C
77s
Lead-free, total run time 5 min. 10 sec.
Section
Parameter
PreHt
160°C

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50s
S2.2
Heat
180°C
85s
S0.2
Ref
228°C
50s
S1.0
RefKp
25s
Cool
50°C
100s
S-1.8
Melt
220°C
37s
8. Customer Service
Thank you for using our products, please feel free to contact us if you have any
questions.