Yamato Dp-6900 User manual

Digital platform scale

DP-6900

Service manual

YAMATO CORPORATION YCO-XXXX-XX-XX

•Carefully read this service manual and the product warranty, and then properly use this product.

•Keep this manual for future reference.

-Table of Contents -

1. Basic specifications (dimensions and capacity).................................................................................................2

2. Appearance and display unit.................................................................................................................................4

3. How to use test mode and set the parameters....................................................................................................6

3-1. How to enter test mode ................................................................................................................................6

3-2. How to view information in test mode .........................................................................................................6

3-3. How to set a user parameter and the user parameter table........................................................................8

3-4. Factory setting for each parameter............................................................................................................17

3-5. Initialization of the CPU board ...................................................................................................................20

3-6. Span adjustment (calibration) ....................................................................................................................21

4. Other procedures..................................................................................................................................................22

4-1. How to confirm the checksum ...................................................................................................................22

4-2. How to reset write errors............................................................................................................................22

5-1. Cautions and instructions on use..............................................................................................................23

7. Trouble-shooting ..................................................................................................................................................26

8. Wiring diagram......................................................................................................................................................28

9. Exploded view of the main unit...........................................................................................................................29

9-1 Exploded view of the indicatior...................................................................................................................29

9-2 Exploded view of the weighing platform ....................................................................................................32

9-3 Exploded view of communication options .................................................................................................34

1

1. Basic specifications (dimensions and capacity)

1.

Model

DP-6900

2.

Weighing method

Strain gauge load cell

3.

Weighing platform dimensions

350(W) x 500(D) mm

4.

Data for each weighing capacity

□DP-6900（NTEP model）

Capacity Increment

Indication

resolution

Minimum

Increment

Maximum

Tare

30kg

0.01kg

1/3000

0.2kg

30kg

60lb

0.02lb

1/3000

0.4lb

60lb

960oz

0.5oz

1/1920

10.0oz

960oz

60lb

0.5oz *1

1/1920

10.0oz

60lb

60kg

0.02kg

1/3000

0.4kg

60kg

150lb

0.05lb

1/3000

1.0lb

150lb

2400oz

1oz

1/2400

20oz

2400oz

150lb

1oz *1

1/2400

11lb:4oz

150lb

150kg

0.05kg

1/2400

1kg

150kg

300lb

0.1lb

1/3000

2.0lb

300lb

4800oz

2oz

1/2400

40oz

4800oz

300lb

2oz *1

1/2400

2lb:8oz

300lb

□DP-6900N（Non NTEP model）

Capacity Increment

Display

resolution

Indication

resolution

Minimum

Increment

Maximum

Tare

30kg

0.005kg

1/6000

1/3000

0.01kg

30kg

60lb

0.01lb

1/6000

1/3000

0.2lb

60lb

960oz

0.2oz

1/4800

1/1920

4.0oz

960oz

60lb

0.2oz

1/4800

1/1920

4.0oz

60lb

60kg

0.01kg

1/6000

1/3000

0.2kg

60kg

150lb

0.02lb

1/7500

1/3000

0.4lb

150lb

2400oz

0.5oz

1/4800

1/2400

10oz

2400oz

150lb

1oz

1/2400

1lb:4oz

150lb

150kg

0.02kg

1/7500

1/3000

0.4kg

150kg

300lb

0.05lb

1/6000

1/3000

1.0lb

300lb

4800oz

1oz

1/4800

1/2400

20oz

4800oz

300lb

1oz

1/4800

1/2400

1lb:4oz

300lb

*1: Unit “lb-oz”is not legal for trade.

5.

Display panel

Display tube

LCD module

Segment size for 1 digit

17(W) x 32(H) mm

Indicators

Weight:

Maximum 5 digits

STABLE sign ( )

Comes on when the measured value of the instrument

is stable

Zero sign (▼)

Comes on when the zero point is displayed.

GROSS sign (▼)

Comes on when the gross weight is displayed with the

tare function enabled.

NET sign (▼)

Comes on when the tare function is enabled.

Overweight sign ( )

Comes on when the checkweighing function is used.

Proper weight sign

( )

Comes on when the checkweighing function is used.

Underweight sign ( )

Comes on when the checkweighing function is used.

Battery sign ()

Displayed at three levels depending

on the remaining battery.

2

6. Functions

(1) Zero reset function: Resets the indication to zero (within ± 1.9% of weighing capacity).

(2) One-touch tare function: Conducts the one-touch tare function.

(3) Automatic OFF function:

The power is automatically turned OFF when the STABLE sign has

been turned ON for a preset time during the use of batteries.

(4) Checkweighing function:

Evaluates the weighed items as “underweight,” “proper weight,” or

“overweight” starting from the indication of zero.

(5) Gross/Net switching function:

When the tare function is enabled, the indication can be switched

between gross weight and net weight.

(6) LED lighting function:

The Evaluation LED light comes on depending on the weight level:

underweight, proper weight, or overweight.

7. Appearance

(1) Dimensions: 354(W) x 634(D) x 784–804(H) mm

(2) Weight: Approx. 13 kg

(3) Materials:

Indication unit: ABS resin; Weighing platform: steel; Platform cover:

stainless steel

8.

Dust-proof and water-proof

protection:

IP52 compliant

9. Power supply: Lead acid battery(include), AC adapter

10.

Battery life:

Approx. 240 hours in continuous use.

Charging time: Approx. 12 hours.

Cycle life: Approx. 200 times.

11. Power consumption: About 0.036W for normal use and about 1.44W at max

12. Operating conditions

(1) Operating temperature range: –10°C to +40°C

(2) Charging temperature range +5°C to +35°C

(3) Operating humidity range: 30% to 85% R.H.

(no condensation)

13. Option (1)RS232C communication unit (D-SUB 9P)

(2)USB Serial communication unit (USB Type-B)

(3)LAN communication unit (RJ45 / 10BASE-T, 100BASE-T)

(4)Separate stand for indicator

3

2. Appearance and display unit

Dimensional outline drawing

Display unit

STABLE sign

Zero sign

NET sign

Evaluation

LED light

GROSS sign

Evaluation sign

Battery sign

Comes on when

batteries are used

4

Operation keys

Power ON/OFF key

Press this key to turn the power ON.

To turn the power OFF, hold down this key until it does.

If the upper and lower limits are set for the checkweighing function, the

checkweighing function starts.

Gross/Net switching key

If you wish to confirm the gross weight with the tare function enabled, press this key

to switch the indicated value between the gross and net weights.

This key can also be used to register various setting values.

Easy Program Set key

Press this key to set a target value with a single action.

This key can also be used to register various setting values.

key

If you wish to use the checkweighing function, hold down this key to start setting a

target value.

This key can also be used to decrease various setting values by 1.

Tare key

Press this key to show the weight of a container as zero. Then the system subtracts

the weight as tare.

This key can also be used to increase various setting values by 1.

Zero Reset key

If the indication is deviated from zero before weight measurement, press this key to

reset it to zero.

This key can also be used to register an input value of user parameters and switch

to the next screen.

(Combination of multiple keys)

＋

User parameter setting mode

Press both keys simultaneously. System enters the user parameter setting

mode, where you can set various user parameters.

＋

Unit Selection

Press both keys simultaneously to toggle among kilogram, pound, ounce and

pound/ ounce indications.

5

3. How to use test mode and set the parameters

3-1. How to enter test mode

To enter test mode, remove the sealing screws next to the battery box and press the deep-set switch inside the

small round hole with a pointed nonconductive object. The panel will show decuple-precision weight values.

3-2. How to view information in test mode

In test mode you can confirm the following information.

Press or to cycle through the following indications.

Item Indication Description

1. TEST

Internal Count

→

Displays a measurement with

precision ten times higher than the

scale interval used in normal

mode, up to a weighing capacity of

30000 to 64000 counts.

2. INIT

Initial Value

→

Displays the internal counts of the

load applied to the platform when

nothing is placed on the weighing

platform. The value changes if the

zero resetting or the zero tracking

is performed.

3. RAW

Raw Count 1

→

Displays a value obtained as a

result of AD conversion.

4. RAW2

Raw Count 2

→

Displays a value obtained by

averaging the values of the Raw

Count 1.

5. ADC0

Option check

→

Displays the status of internal

correction made by the AD

converter.

6

6. Bat

Power Supply

Voltage

→

An input voltage from the batteries

or theAC adapter is converted

from analog to digital values inside

the CPU and displayed here.

7. VER

Version

→

Displays the ROM version of the

software.

If you press when the

panel shows the version, you can

confirm the checksum.

8. CHK

Display Check

→

All the segments of the LCD

flicker..

9. PArA

→

Enters parameter setting mode.

10. SPAn

→

Enters span adjustment mode.

11. DEF

→

Enters board initialization mode.

To return to normal mode, press during the indication of the version.

7

3-3. How to set a user parameter and the user parameter table

The parameters of the DP-6900 are divided into 3 groups, “User Parameters,” “Dealer Parameters,” and

“System Parameters.” In test mode you can change any of the parameters. In normal mode where a weight is

displayed, you can change user parameters only.

(1) User parameters

With the user parameters, the users can change the functions of the instrument according to their

specifications.

◊How to set a user parameter

Operation Display

Press and at the same time.

The panel shows the user parameter #01 and its setting.



Use the following keys when you set user parameters.

:Switches to the next

parameter. :Increases the

parameter setting by 1 : Decreases the

parameter setting by 1.

(TIPS)

Hold down and press to return to the previous parameter (Pressing these keys

when the parameter is #01 switches the parameter to #P4).

When the setting value is flashing, press to shift the focus to the parameter number, which

then flashes. Hold down or at this point to move the parameter number fast forward.

Press again to enter a setting value.



(IMPORTANT)

When you have changed a setting, be sure to press to switch to the next parameter before

turning off the power.

Unless you switch to the next parameter, any changes you made to the setting will be lost.

User parameter table

No. Item

Setting

value

Description of options

#01

Checkweighing function

0:

Disable the checkweighing function

1:

Simplified checkweighing function

Parameter only for DP6900

2:

Inspection checkweighing function

(The upper and lower limits are set using the measured weight of a

sample as the middle value.)

#03

LED lighting timing

0:

Disable LED

(parameter for multi-function)

1:

LED ON upon underweight

2:

LED ON upon proper weight

3:

LED ON upon overweight

Parameter only for DP6900

4:

LED ON upon underweight and flashes upon overweight

8

No. Item

Setting

value

Description of options

#05

Automatic power OFF time

0:

Disable automatic power OFF function

1:

5 minutes

2:

10 minutes

3:

15 minutes

4:

30 minutes

5:

60 minutes

#07

Flashing of indicated value per

evaluation

(parameter for checkweighing

function)

0:

Disable flashing

1:

Flash upon underweight

2:

Flash upon proper weight

3:

Flash upon overweight

4:

Flash upon underweight or overweight

5:

Synchronize with #03 (LED lighting timing)

#09

Gravity compensation for the region

of use

0: Parameter for instruments for other than transactions or certifications

#10

Scale ID (parameter for option)

0–99:

Factory setting: 000

#11

Communication mode

0:

No communication

(parameter for option)

1:

Automatically send the data when stable

2:

Automatically send the data when stable and removed

3:

Manually send the data with key when stable

4:

Automatically send the data upon proper weight when the

multi-function is used

5:

Manually send the data with key upon proper weight when the

multi-function is used

6:

Setting prohibited

#14

Communication data

(parameter for option)

0:

Net weight

1:

Net weight, tare, and gross weight

2:

Net weight and tare

#15

Communication speed

(parameter for option)

0:

9600 bps

1:

2400 bps

2:

4800 bps

3:

9600 bps

4:

19200 bps

5:

38400 bps

6:

57600 bps

7:

115200 bps

#16

Character length

(parameter for option)

0:

8 bits

1:

7 bits

#17

Parity (parameter for option)

0:

No parity

1:

Odd parity

2:

Even parity

#18

Stop bit

0:

1 bit

(parameter for option)

1:

2 bits

#22

Weighing speed

0:

Standard

1:

Speed-oriented

* If you specify this option for an instrument for transactions or

certifications, it becomes invalid (0: standard).

Parameter only for DP6900

2:

Accuracy-oriented

#23

Display SEnd after sending data

0:

Do not display SEnd

1–8:

Display SEnd for the specified seconds (factory setting: 1)

9

No. Item

Setting

value

Description of options

#24

Unit at power on

0:

kg

1:

lb

Displayed only when #41 is set

to 2(YCO)

2:

oz

3:

lb:oz

#25

LED brightness

0:

25% of full brightness

1:

50% of full brightness

2:

75% of full brightness

3:

100% of full brightness

#26

Send date & time data

0:

Disable

(parameter for option)

1:

Enable

#27

Send multifunction settings

0:

Disable

(parameter for option)

1:

Enable

#28

(Not available)

0:

(Not available for setting)

#29

(Not available)

0:

(Not available for setting)

#30

Send zero weight data

0:

Disable

(parameter for option)

1:

Enable

#P3

Unit of tolerance for checkweighing

function

0:

Scale interval

1:

Ratio with respect to the target value (%)

2:

Ratio with respect to the weighing capacity (%)

#P4

Tolerance for checkweighing

function

0–255: Range in units specified in #P3 (Factory setting: 10)

Note on user parameters

The user parameters #10, #11, #14–18, and #23–30 are shown on the panel only when the dealer parameter #13

“Communication method” is set to anything other than “5.” When the dealer parameter #13 is set to “5: No communication”

(factory setting), these user parameters are not shown.

10

(2) Dealer parameters

Dealer parameter mode is used to change dealer parameters, which concern the instrument’s weight

measuring properties such as the detection of stable measurement values. For this reason, do not make any

unnecessary changes. Moreover, do not disclose, outside the dealer, how to make the settings.

◊How to set dealer parameters

Operation Display



Press and at the same time.

While holding down , press twice.

Release all the keys and then press once.

The panel shows the dealer parameter #E0 and its setup value.



Use the following keys when you set dealer parameters.

:

Switches to the next parameter.

:

Increases the parameter setting by 1

&

:

Return to the previous parameter.

:

Decreases the parameter setting

by 1.



(IMPORTANT)

When you have changed a setting, be sure to press to switch to the next parameter before

turning off the power.

Unless you switch to the next parameter, any changes you made to the setting will be lost.

◊Dealer parameter table

No. Item

Setting

value

Description of options

#13

Communication method

0:

(Not available for setting)

(parameter for option)

1:

(Not available for setting)

2:

RS232C / USB-Serial input/output

3:

(Not available for setting)

4:

(Not available for setting)

5:

(Not available for setting)

6:

(Not available for setting)

7:

LAN communication

#E0

System ID

0:

0

#E1

Stable-state sampling count

0–15:

7 Number of samplings: This setup value x 2

#E2

Stable-state count

0–50:

5

#E3

Very stable-state count

0–50:

2

#E4

Stable-state releasing count

0–50:

10

#E5

Moving average filter 5

0–15:

Number of taps (invalid when it is set to less than 2) 13

#E6

Moving average filter 1

0–7:

Number of taps (invalid when it is set to less than 2) 4

#E7

Moving average filter 2

0–7:

Number of taps (invalid when it is set to less than 2) 5

#E8

Moving average filter 3

0–16:

Number of taps (invalid when it is set to less than 2) 6

#E9

Moving average filter 4

0–31:

Number of taps (invalid when it is set to less than 2) 29

#F0 Load/Unload judge 1–255:

The amount (weight) at which an item is judged to be loaded or

unloaded.

For instruments to be used for certification, set this to 20 or higher.

#F2

One-time addition

0:

Add the same weight any number of times

1:

One-time addition (After a measurement is close to zero, manually

add the next measurement only once.)

#F9

Decimation

Prevention of flickering

0–15: This setup value x 20 ms

11

(3) System parameters

System parameter mode is used to change system parameters, which determine the instrument’s

specifications.

◊How to set system parameters

Operation Display



When the panel shows Internal Count in test mode, press and

at the same time.

Then the span adjustment screen appears. Press and

at the same time. The panel shows the system parameter #b0 with “0”

as its setup value.



Use the following keys when you set system parameters.

: Switches to the next parameter.

: Increases the parameter setting by 1

&

: Return to the previous parameter.

: Decreases the parameter setting by 1.



(IMPORTANT)

When you have changed a setting, be sure to press to switch to the next parameter before

turning off the power.

Unless you switch to the next parameter, any changes you made to the setting will be lost.

◊How to set system parameters (Method 2)

Operation Display

In test mode, select [PArA], and press .

The parameter setup screen appears.



Use the following keys when you set system parameters.

:

Switches between the parameter number and the setup value.

(The flashing field can be edited.)

: Increases the parameter setting by 1

: Decreases the parameter setting by 1.



(IMPORTANT)

When you have changed a setting, be sure to press or to switch to the next parameter

before turning off the power.

Unless you switch to the next parameter, any changes you made to the setting will be lost.

12

◊System parameter table

No. Item

Setting

value

Description of options

#40

Gravity compensation

0:

No compensation

1–29:

Setting prohibited

30–210:

(Acceleration of gravity [m/s2] - 9.7600) x 10000 ÷ 5 + 30 (offset)

Setting range: 9.7600–9.8500 m/s2;

Minimum setting increment: 0.0005 m/s2

#41

Scale mode

0:

Fixed single increment

1:

Setting prohibited

2:

YCO Mode

3-7:

Setting prohibited

#43

Weighing capacity mantissa

0–99:

#44

Weighing capacity index

1–4:

#45

Increment of small capacity

0:

Increment: 1

1:

Increment: 2

2:

Increment: 5

3:

Increment: 10

4:

Increment: 20

5:

Increment: 50

6:

Increment: 100

7:

Increment: 200

#46

Location of decimal point

0:

No decimal point

1:

1 digit after the decimal point: 0.0

2:

2 digits after the decimal point: 0.00

3:

3 digits after the decimal point: 0.000

4:

4 digits after the decimal point: 0.0000

#47

Test for certification

0:

Verified

1:

Not verified

#49

Battery type to be used

0:

Dry Batteries

1:

Rechargeable Lead-acid battery

#50

Calibration with lb weight

0:

kg

1:

lb

#51

lb: Weighing capacity mantissa

0–99:

#52

lb: Weighing capacity index

1–4:

#53

lb: Location of decimal point

0:

No decimal point

1:

1 digit after the decimal point: 0.0

2:

2 digits after the decimal point: 0.00

3:

3 digits after the decimal point: 0.000

#54

lb: Increment

0:

Increment: 1

1:

Increment: 2

2:

Increment: 5

3:

Increment: 10

4:

Increment: 20

5:

Increment: 50

6:

Increment: 100

7:

Increment: 200

13

No. Item

Setting

value

Description of options

#55

oz: Weighing capacity mantissa

0–99:

#56

oz: Weighing capacity index

1–4:

#57

oz: Location of decimal point

0

No decimal point

1

1 digit after the decimal point: 0.0

2

2 digits after the decimal point: 0.00

3

3 digits after the decimal point: 0.000

#58

oz: Increment

0:

Increment: 1

1:

Increment: 2

2:

Increment: 5

3:

Increment: 10

4:

Increment: 20

5:

Increment: 50

6:

Increment: 100

7:

Increment: 200

#60

Decimal point marker

0:

Dot: 0.00

1:

Comma: 0,00

#61

Weighing unit (metric)

0:

None

1:

g

2:

kg

#62

Weighing unit display

0:

Do not show the weighing unit

1:

Show the weighing unit

#65

Internal resolution

0:

Setting prohibited

1–100:

Number of counts per 1 increment

#66

ADC self-calibration

0:

Disable

1:

1 minute (7.5-second sampling)

2:

2 minutes (15.0-second sampling)

3:

4 minutes (30.0-second sampling)

4:

8 minutes (60.0-second sampling)

5:

16 minutes (2-minute sampling)

6:

32 minutes (4-minute sampling)

7:

8 seconds (1.0-second sampling)

#67

ADC cutoff bit No.

0–3:

Cut off 6 bits

4–7:

Cut off the specified number of bits

#68

Over scale

0–10:

Number of increments from the weighing capacity

#69

Adjustment: Weighing capacity

mantissa

0–99: Weighing capacity for span adjustment

#70

Zero point range (% of full

capacity)

0–100: Set the range of zero point in % of the weighing capacity

#71

Zero point range - plus side (%)

0–100:

Positive-side percentage of the zero point range specified in #70

#72

Tare clear by reset key

0:

Do not clear the tare by pressing the Zero Reset key

1:

Clear the tare by pressing the Zero Reset key

#73

Zero tracking timing

0:

Disable the zero tracking function

1–15:

Correct the zero point at intervals of this setting x 20 ms

#74

Tare function

0:

Disable the tare function

1:

One-time tare

2:

Consecutive tare

14

No. Item

Setting

value

Description of options

#75

Zero reset under tare operation

0:

Enable zero reset during the tare function

1:

Disable zero reset during the tare function

#77

Test mode entry method

0:

By key operation (software sealing) only

1:

By key operation (software sealing) only

User parameter is invalid

2:

By test pin (hardware sealing)

3:

By test pin (hardware sealing)

User parameter is invalid

4:

By test pin (hardware sealing) only

5:

By test pin (hardware sealing) only

User parameter is invalid

#78

DP operation mode

0:

DP-6900

1:

DP-7900PW

#82

Checkweighing function

0:

Disable

1:

Enable

#85

Display hold function

0:

Disable



Setting prohibited

1:

Enable

#86 Time of display hold 0:

Exit the display hold (indicating a fixed measuring value on the panel)

when the value is close to zero point

Setting prohibited 1–15:

Carry out the display hold for this setup period (seconds) after the

value is close to zero point

#87

Adding weight operation under

display hold function

0: Disable

Setting prohibited 1–5:

Update the weight indication when there is a weight change exceeding

this setup value x scale interval (increment)

#88

Time delay for span adjustment

0:

No time delay

1–10:

Acquire the span value after a delay of this setup value (seconds)

#90

Mechanical zero 1

0–255: