Bongshin BS-750 Quick start guide

1
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2
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We greatly appreciate your purchase of the BONGSHIN industrial
indicator. These goods perform excellently and exhibit splendid
properties through strike tests.
BONGSHIN indicator is delicately designed to coincide with the special
requirements of several industrial fields and includes many functions
and various external interfaces. Also, it is programmed for the user’s
convenience and contains help display functions that are easily
accessible.
Before using BS-750, It is recommended that you read this manual
carefully so you may use this device to its full potential.
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■ Place the indicator on a flat and stable surface.
■ Do not severely press because the light pressing of keys can incite
the operation.
■ Do not subject the scale to sudden temperature changes.
Operating temperature : -10℃~40℃ (+14℉ ~ +104℉ )
■ Keep the scale away from strong EMI noises may cause incorrect
weight readings.
■ Keep the main body from rain and keep in dry area.
■ Do not use inflammable materials in cleaning.

3
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■ Appropriate for weight and measurement system.
■ Easy operation and various options.
■ Simple full digital calibration.
■ Watchdog circuitry (system restoration)
■ Weight Back-up (power on actual weight)
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■ Various specification of weight conversion speed.
(Digital Filter Function)
■ Various printer connection. (RS-232C Serial Printer)
■ RS-232C standard
■ User can set the max. weight which users want to and division
at one’s disposal.

4
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@cUXWY``YlW]hUh]cb
Jc`hU[Y
DC 5V,
up to 4 x 350ohm load cells
=bdihgYbg]h]j]hm 0.3 μV/D
GmghYa`]bYUf]hm Within 0.01% F.S.
NYfcUX^ighfUb[Y 0㎷ ~ 20㎷
=bdihJc`hU[Y Max. 20㎷ Min. 5㎷
5WWifUWm Zero drift : ±0.2 μV/℃ RTI max.
Span drift : 20ppm/℃ max.
=bdihBc]gY ±0.3 μV p.p or less
=bdih=adYXUbWY 10 ㏁ (Min.)
5#8WcbjYfhYf Sigma-Delta system
5#8]bhYfbU`fYgc`ih]cb Approximately 200,000 counts
5#8YlhYfbU`fYgc`ih]cb 1/30,000 (Max.)
5#8WcbjYfg]cbgdYYX 10 times/sec
AUl"fYgc`ih]cb  1/30,000
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8]gd`Um 7 Segment LED,
6-Digits, 20.30mm(Height)
8]gd`UmVY`cknYfc “-”minus signal
5XX]h]cbU`gmaVc`g Zero, Stable, Net, Tare, Hold
A]b"8]j]g]cb x 1, x 2, x 5, x 10, x 20, x 50
8YW]aU`Dc]bh 0, 0.0, 0.00, 0.000

5
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AC 230V, 50/60Hz
(DC9V, 1000mA Adaptor)
DckYfWcbgiadh]cb 10 W
8UhUAYacfm 10 year
CdYfUh]b[hYadYfUhifY -10℃~+40℃ (+14℉ ~ +104℉ )
<ia]X]hm 85% Rh Max.
CjYfU``X]aYbg]cbg 175(W) x 53(D) x 160(H)
KY][\h 1.0 kg
("Cdh]cb
GhUbXUfX Serial Interface : RS-232C
Cdh]cb–% Serial Interface : RS-422/485

6
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7
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N9FC`Uad: ON when the current weight is 0 kg.
GH56@9`Uad : ON when the weight is stable.
B9H`Uad : ON when the current weight is NET weight.
H5F9`Uad : ON when the tare weight is stored.
<C@8`Uad : Lamp is on when moving object is weighed.
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Available keys instead of numeric keys.
Change the set value
Increases (Decrease) the first place value to 1.
Change the digit of the set value.
Move to the right (left) by 1 place.
Usage-input the numeric value in CAL, SIM, SET mode.

8
Returns the display to 0
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!UihcaUh]WhUfYkY][\h]bdih  !
Use container in weighing.
Current weight is memorized as tare weight.
If you press TARE key in unload condition, Tare setting is
released automatically.
!aUbiU`hUfYkY][\h]bdih!
When you already know the tare weight, press key tare and
input tare weight with arrow keys and memorize it by
pressing ON/OFF(ENTER) key.
Use container in weight.
NET lamp off – gross weight
NET lamp on –net weight
In case tare weight is registered, tare and item’s total weight is
G. weight and only item’s weight is N. weight.

9
PRINT key
■ Df]bh_Ym → Set in F23 : 1
■ <c`X_Ym → Set in F23 : 2
■ G9HacXY 
→ By pressing “PRINT” key more than 3 seconds.
■ CB#C::_Ym
■ HchU`Df]bh_Ym → Set in F24 :1
Print both the present weighing value and total weighing value.
■ Store current condition and exit.
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By pressing “PRINT” key more than 3 seconds.
("<ckhcYbhYf75@acXY
Slid switch usage
  8]dg`]XYGK%–75@AcXY
  8]dg`]XYGK&–G=AAcXY

10
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■ @C5879@@ : cable gland for load cell
EXC+
SIG+ SIG-
EXC-
S- (Blue)
SH (Shield )
E- (White)
E+ (Red)
S+ (Green)
■ FG!&'&7DCFH : Serial interface port. (computer, printer)
■ 57585DH9F : Port for DC power. (DC 9V adapter are available)
Pin no. SIGNAL
1 Shield SHIELD
2 Load cell Input Voltage (-) EXC- (white)
3 Load cell output (-) SIG- (blue)
4 Load cell output (+) SIG+ (green)
5 Load cell Input Voltage (+) EXC+ (red)

11
▶  F95FG@=89GK=H7<IG5;9
■ 8]dg`]XYgk% : CALIBRATION mode
SW 1 ON : Shift to calibration mode.
Turn sw1 off after calibration, It returns to weighing mode.
■ 8]dg`]XYgk& : SIMURATION CALIBRATION mode
SW 2 ON : Shift to simulation calibration mode.
Turn sw2 off after calibration, It returns to weighing mode.

12
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Turn on the power while CAL switch 1 on the rear panel of the indicator and
CAL mode starts.
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Increase the first place set value to1.
Move to the left by 1 place of the set value.
Move into next menu.
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CAL 1 : Maximum Capacity Set
CAL 2 : Minimum Division Set
CAL 3 : Setting Weight in span calibration
CAL 4 : Zero Calibration
CAL 5 : Span Calibration

13
 75@%
- Function : AUl]aia7UdUW]hmGYh
Range → 1 ~ 99,999kg
Key Display Description
▲▼ : Increase
◀▶ : Shift of digit
“ON/OFF” key :
Store and move into
next menu
CAL 1 condition.
100 kg
10000kg
☞ REF 1. The maximum capacity means the maximum weight that scale
can measure.
 75@&
- Function : A]b]aia8]j]g]cbGYh
Range → 1~ 50
Key Display Description
▲▼ : Increase
“ON/OFF” key :
Store and move
into next menu
CAL 2 condition.
1 kg (Decimal point : 0)
0.01kg (Decimal point: 2)
☞ REF 1.The minimum division means the value of one division.
☞ REF 2. External resolution is obtained by division the min. division by the
maximum capacity. Set the resolution to be within 1/30,000.

14
 75@'
- Function : GYhh]b[KY][\h=bGdUb7U`]VfUh]cb 
Range → 1~ 99,999kg
Key Display Description
▲▼ : Increase
◀▶ : Shift of digit
“ON/OFF” key :
Store and move into
next menu
CAL 3 “ON/OFF” key :
100 kg
10000kg
Setting Weight
☞ REF 1. The weight shall be within the range of 10%~100% of maximum weight.
☞ REF 2. The setting weight must be over the range of 10% of maximum weight.
☞ REF 3. The setting weight over the maximum capacity.
 75@(
- Function : NYfc7U`]VfUh]cb
Key Display Description
“ON/OFF” key :
Zero calibration
and move into
next menu
CAL 4 condition.
Unload the tray and press “ON/OFF” key
Under zero calibration
Zero calibration is completed.
☞ REF 1. If zero calibration is done without any error, “SUCCESS” message is
displayed and program moves into CAL 5 automatically.
☞ REF 2. If the “ZERO” key is pressed, only zero calibration is completed
and program moves SAVE & EXIT mode. Turn sw1 off.

15
 75@)
- Function : GdUb7U`]VfUh]cb
Key Display Description
“ON/OFF” key :
Span calibration
and move into
next menu
CAL 5 condition.
Load the weight which was set in
CAL3 and press “ON/OFF” key.
Under span calibration
Span calibration is completed.
Turn sw1 off. (Save & exit CAL mode)
☞ REF 1. If zero calibration is done without any error, “SUCCESS” message is
displayed the weight of setting weight is displayed on LED screen.
Check the weight.
☞ REF 2. Check the weight of setting weight and turn sw1 off and
calibration is completed.

16
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Turn on the power while CAL switch 2 on the rear panel of the indicator and
CAL mode starts.
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Increase the first place set value to1.
Move to the left by 1 place of the set value.
Move into next menu.
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Sim 1 : Maximum Capacity Set
Sim 2 : Minimum Division Set
Sim 3 : Rated Output Set
Sim 4 : Zero Calibration

17
 G]a%
- Function : AUl]aia7UdUW]hmGYh
Range → 1 ~ 99,999kg
Key Display Description
▲▼ : Increase
◀▶ : Shift of digit
“ON/OFF” key :
Store and move into
next menu
Sim 1 condition.
100 kg
10000kg
☞ REF 1. The maximum capacity means the maximum weight that scale
can measure.
 G]a&
- Function : A]b]aia8]j]g]cbGYh
Range → 1~ 50
Key Display Description
▲▼ : Increase
“ON/OFF” key :
Store and move
into next menu
Sim 2 condition.
1 kg (Decimal point : 0)
0.01kg (Decimal point: 2)
☞ REF 1.The minimum division means the value of one division.
☞ REF 2. External resolution is obtained by division the min. division by the
maximum capacity. Set the resolution to be within 1/30,000.

18
 G]a'
- Function : FUhYXCihdihGYh
Range → 1mV/V ~ 3mV/V
Key Display Description
▲▼ : Increase
◀▶ : Shift of digit
“ON/OFF” key :
Store and move
into next menu
Sim 3 condition.
1mV/V
2mV/V

 G]a(
- Function : NYfc7U`]VfUh]cb
사용 키 FND 화면 설 명
“ON/OFF” key :
Zero calibration
and move into
next menu
Sim 4 condition.
Unload the tray and press “ON/OFF” key
Under zero calibration
Zero calibration is completed & Span
calibration is completed.
Turn sw2 off. (Save & exit CAL mode).
☞ REF 1. If zero calibration is done without any error, “SUCCESS” message is
displayed the weight of setting weight is displayed on LED screen.
Check the weight.
☞ REF 2. Check the weight of setting weight and turn sw2 off and
calibration is completed.

19
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By pressing “PRINT” key more than 3 seconds.
At this time, “:$%” message is displayed on FND screen after “G9H”
message.
○
1 “:$%” : Call the function which you want to convert.
○
2 Input function no. to convert with arrow keys and press ON/OFF key.
○
3 “:$%!%” : Means call the function which you would convert.
○
4 Input function no. to convert and press ON/OFF key.
&"<ckhc9l]h
By pressing “PRINT” key more than 3 seconds.
'"5jU]`UV`Y?Ymg 
Increase the first place set value to1.
Move to the left by 1 place of the set value.
SET mode starts.
Store current condition and SET mode exit.
Move into next menu.