3.6. Basic Counting Operation (using one touch Tare )7
3.7. Multiple Denomination Accumulation7
2
3
4.0.PROGRAM MODE8
4.1. Program Known Coin Data8
4.2. Program Unknown Coin Data8
4.3. Program Preset Tare Key9
4.4. Clear Preset Data10
4.5. Error Message List10
5.0.MAINTENANCE MODE11
5.1. Span Adjustment11
5.2. Specification Setting12
5.3. Internal Count13
5.4. Specification List13-15
6.0
The DMC-688 money counting scale offers a practical solution to a full range of precision counting applications. There is
a variety of models available ranging from a weight capacity of 6 lb through 60 lb.
This manual will provide the user with information necessary to operate and program the DMC-688. Included in this
manual are examples, descriptions, specifications, operating instructions and service guide.
The coin unit weights used to program this scale in the factory were developed using very small samples; actual unit
weights will vary. It is recommended that the coin unit weights be re-calibrated before the scale is put into service. It's
recommended that a large number of coins be used to obtain the most accurate coin unit weights. Using 500 to 1000 coins
will produce a very accurate coin unit weight. Refer to page 8 section 4.2. Program Unknown Coin Data.
NOTE: Turn Scale On Side, Do Not Turn Scale Upside DOWN!
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1.2. SETTING UP:
1.2.1. See Page 2 For Unlocking Procedure
1.2.2. Level Adjustment:
a. Place scale on firm and flat base.
b. Level the scale by turning adjusting legs until
air bubble is at the center of the Level Indicator.
Not Level Level
1.2.3. Place the platter onto scale:
a. Place the platter on the scale. Ensure that the platter is properly aligned.
1.2.4. Power Supply:
a. Connect to power supply. Or install 6 pcs of “D” cell battery (DC1.5V)
b. With nothing placed on the platter, depress ON/OFF key.
c. Scale is ready for operation after segment checking.
1.2.5. Battery Installation
a. Turn scale on side. DO NOT TURN SCALE UPSIDE DOWN!
b. Remove battery compartment cover shown on opposite page.
c. Insert 6 new “D” cell batteries noting the polarity and also make sure that the
batteries are properly aligned.
d. Re-install the battery compartment cover.
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2.0. SPECIFICATIONS
2.1. Features
* Low cost counting scale.
* Quick response to weight changes.
* Capacity: 3kg, 6kg, 15kg, 30kg, 6lb, 15lb, 30lb and 60lb.
* Resolution: Display Resolution 1/3000.
Internal Resolution 1/30000.
* Low power consumption : 6 x D size dry battery backup for more than 500 hours of
continuous usage or 1000 hours with alkaline batteries.
* Two-Point battery low detect:
A. When battery is weak, the Battery Indicator will light up.
B. When the power from battery becomes so low that the scale can not compute
accurately, all displays will shut off except the Battery Indicator. The power is then shut off
completely after 1 minute.
* Calibration by software.
* Splash proof.
* 28 switch keys.
- ON/OFF key.
- 10 Numeric keys (share with preset keys).
- 12 Operational keys(3 keys share with preset keys).
- 18 Preset keys.
* Large platter: 10” x 13”.
* High impact ABS plastic housing.
* High contrast LCD display.
2.2. Technical Specification
2.2.1. Operating Conditions
* Power Source: AC 117/100V, 240/230/220V (+10%, -15%).
: DC 6 x D size dry battery (9V)
* Operating Temperature: -10 ... +40ºC (OIML).
* Operating Humidity: 15 ... 85% RH.
* Power Consumption: 3W when using AC power.
0.1W when using battery.
2.2.2. Analog Specification
* Input sensitivity: 1mV/V.
* Zero adjust range: 0 ± 2.5mV.
* Zero balance range : 0 ± 0.5mV.
* L/C applied voltage: DC 5V.
* Speed of A/D conversion: 3 times/sec.
* Internal Resolution: 30000.
2.2.3. External Connectors
* AC receptacle.
2.3. Dimensions
* Platter size : 10” x 13”.
* Overall size: 13.5” x 14.5” x 4.5”.
* Weight : 9.5lb
NET Lamp:On when tare weightSHIFT Lamp: On when the Shift key is pressed for
is presentNumeric entry
RECALL TARE: On when Preset Tare isWorks as Insufficient lamp in program mode.
Subtracted. (Insufficient) Lamp: On when sampling quantity is too small
MEMORY Lamp: On when accumulated
data is in memory.
Works as Re-compute lamp in
program mode
Re-compute) Lamp: On when Unit Weight Re-computing
PRG Lamp
QTY Lamp
: On when scale is in program mode.
: On when quantity is displayed instead of value($)
: On when batteries are weak and need to be
changed.
2.5. Keysheet Layout
2.6. Key Functions
ON/OFF key: Turn display ON/OFF.Enter Key: Clear data in total accumulation.
SHIFT: Shift preset keys to numeric keys(Enter the data in program or maintenance mode)
(return to weighing from program
mode)
RECALL TARE: Recall preset Tare value(F1 – F10 work as numeric keys and F11 as
QTY/AMT: Toggle between amount and
RE-ZERO Key: Reset weight display to zero.(F17is unit weight key , F18 is pieces key in program mode
TARE Key: Set or clear tare value.
Clear Key: Clear the entry data or unit weight.Numeric Keys: Input Numeric data.
- Minus Key: Subtract parts in total accumulation.Unit Weight Key: Set unit weight after numeric data entry.
+ Plus Key: Add parts in total accumulation.Pieces Key: Enter unit weight by sampling.
quantity.
F1 – F18: Recall coin Unit Weight data and preset Tare data.
Decimal point in shift , program and maintenance mode
•
5
: Decimal point key to enter decimal point
Page 8
3.0. Operation Mode
3.1. ON/OFF
1. Press [ON/OFF] key. To turn scale ON. Ready to operate
2. Press [ON/OFF] key.
To turn scale OFF.
* Note 1: Power On Segment Check Style can be selected by setting SPEC 8.bit2. In this
example assume SPEC 8.bit2 = 0.
Note: TARE IS -- THE CONTAINER BIN, BUCKET , BAG, OR TOTE ETC. THAT IS USED TO
HOLD THE COIN BEING COUNTED.
Note: Tare Subtraction
Tare subtraction can be performed both in Weighing mode and Unit Weight Entry Mode.
3.2. One Touch Tare Subtraction(Subtract the weight of the container with one key press
1. Place empty container (tare) on platter. Example: 0.27 lb
2. Press [TARE] key to subtract the tare weight. Remove the tare weight
3. Press [TARE] key to clear the tare weight.
3.3. Digital Tare Subtraction (subtract the weight of the container by keying in the
weight.)
1. Press [SHIFT] key to allow numeric entry.
2. Key in the tare weight. Example: Press [0] [.] [2] [7] [0] for 0.27 lb.
3. Press [TARE] key to subtract the tare weight. Remove the tare weight
4. Press [TARE] key to clear the tare weight.
3.4. Recalling Preset Tare ( To retrieve A Preset Tare weight stored in memory)
NOTE: To store a tare weight in memory for later use See Page 9 Section 4.3.
Program Preset Tare Key)
1. Starting in the Weighing mode, press [RECALL TARE] key
2. Call up the tare data. Example: Press [F1] key. In 2 seconds after pressing preset key. Alarm
beeps twice, then subtract the tare weight and Scale switches back to Weighing mode.
3. Press [TARE] key to clear the tare weight.
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Coin counting
3.5. Basic Counting Operation
Starting in the Weighing mode.
1. Re-call the preset data. Ex. Press [F4] key for (25¢)
2. Place coins on platter.
Note: !If you wish to see the quantity of coins on the scale Press [QTY/AMT] key.
from $ Amount to Quantity of coin and from Quantity of coin to $ Amount in display
3. Remove the coins from platter.
4. To clear the recalled data. Press [C] key
3.6. Basic Counting Operation (using one touch Tare )
Starting in the Weighing mode.
1. Press [F4] key for (25¢) . Example: Press [F4] key for (25¢)
2. Place empty container on scale and press [TARE] key
3. Place coins into container.
Note: !If you wish to see the quantity of coins on the scale Press [QTY/AMT] key.
from $ Amount to Quantity of coin and from Quantity of coin to $ Amount in display
4. Remove the container of coins from scale platter.
5. To clear the recalled data. Press [C] key
To Switch
To Switch
Total transaction
3.7. Multiple Denomination Accumulation is allowed (SPEC15.1 = 0)
Starting in the Weighing mode.
1. Press desired preset to Re-call the preset data. Example: Press [F4] key for (25¢)
2. Place coins on platter.
3. Press [++++] key to accumulate the data
4. Remove the coins, press [C]
5. Press desired preset to Re-call the next preset data.
Example: Press [F3] key for (10¢)
6. Press [C] key to clear the coin data.
7. Press desired preset to Re-call the next preset data. Example: Press [F5] key for (50¢)
8. Place coins on platter.
9. Press [−−−−] key to subtract the data
10. Remove the coins, press [C]
11. Press [✱] key to check total amount.
Note: Pressing [QTY/AMT] key an Error beep will sound. Error beep will sound. Can not switch to
quantity display while accumulated data is in memory.
12a. press [C] key to continue accumulation
12b. Press [✱] key to clear current total from memory.
NOTE
!!
!!
: Multiple Denomination Accumulation is not allowed (SPEC15.1BIT = 1
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Page 10
4.0. Program Mode (Programming The Pre-Set Keys)
4.1. Program Known Coin Data (this is used if you know the unit weight per 1000 coin that you
are programming
)
Starting in the Weighing mode.
1. Press and hold [RE-ZERO] while pressing [1] [2] [1].
To enter the Program mode.
2. Select the preset key number. Example: Press [F4] key for Quarters
3. Enter value of a coin. Example: Enter [0] [.] [2] [5] for Quarters
4. Press [✱] key. Scale switches to unit weight entry mode.
Digital unit weight entry.
5. Enter unit weight by numeric key.
6. Press [UW] key to set unit weight.
7. Press [UW] key to verify entry.
Enter [1] [2] [.] [4] [4][1] for Quarters
Set unit weight.
Look up full digits of unit weight.
8. Press [UW] key to temporary store.
9. Press [✱] key to save the data.
Removed samples, press [SHIFT] key to return to weighing mode.
4.2. Program Unknown Coin Data (Recommended Method – Sampling Improves Accuracy)
This is used if you don’t know the unit weight (unit weight per 1000 pcs) of the coins. A large
population of coin is recommended for this procedure. For the best results use a known full bag
of coin. If your full bag is 1000 dollars (quarters) then you should use 4000 piece sample(quarters).
If your full bag is 400 dollars (quarters) then you should use 1600 piece sample(quarters).
Save the data.
Scale switches back to Wghmode.
Starting in the Weighing mode.
1. Press and hold [RE-ZERO] while pressing [1] [2] [1]. To enter the Program mode.
2. Select the preset key number. Example: Press [F4] key for Quarters
3. Enter value of a coin. Example: Enter [0] [.] [2] [5] for Quarters
4. Press [✱] key to save the data. Scale switches to unit weight entry mode. Current unit weight is
displayed.
5. Press [C] key to clear unit weight.
Unit weight entry by sampling.
6. Place empty container on scale, and press [TARE] key
When sample pieces are not sufficient, the following procedure 9 (a) - (b) are required.
10 (a) Add required samples. Add exactly 10 pcs.
10 (b) Press [Pcs] key, Scale computes the unit weight.
The accuracy of the computation can be improved by increasing the sample size with procedure 10
(c) - (d).
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11 (c) Add sample pieces. e.g. 126 pcs.
11 (d) Press [Pcs] key, Scale re-computes the unit weight.
12. Press [✱] key to save the data.
13. Remove samples, press [SHIFT] key to return to weighing mode
4.3. Program Preset Tare Key
Starting in the Weighing mode.
1. Press and hold [RE-ZERO] while pressing [1] [2] [1], To enter the Program mode.
2. Press [RECALL TARE] key, To program a preset tare key.
3. Select the preset key number. Example: Press [F1] key. The current tare value is displayed.
4. Enter value of a tare. Example: Enter [0] [.] [2] [7]
5. Press [
6. Select the preset key number. Example: Press [F2] key
7. Press [C] key to clear tare data.
8. Press [
9. Press [SHIFT] key to return to weighing mode
4.4. Clear Preset Data
✱] key to save the data.
✱] key to save the data.
Starting in the Weighing mode.
1. Press and hold [RE-ZERO] while pressing [3] [6] [3], to enter into Program mode.
2. Select the preset key number. Example: .Press [F12] key
3. Press [C] key to clear coin data
4. Press [✱] key to save the data.
5. Press [SHIFT] key to return to weighing mode
4.5. Error Message List
The following error message will appear when a incorrect operation is performed.
MessageRemarksAppropriate Operation
O F
When displayed weight exceeded capacity+9d, or
Remove the item on the platter.
something is on the platter when power on.
U F
E R R O R
When displayed minus weight >= 9d.
When calibration operation is not correct, or A/D
REZERO or ON/OFF again.
Repeat calibration operation.
starting check error.
888888
* Note : "888888" - All Segments.
When scale is not steady when power on.
Place scale on firm, flat base.
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5.0. Maintenance Mode
5.1. Span Adjustment
Prior to the calibration of the scale, please note that the SPEC settings corresponding to Minimum
Display and Weight Decimal Point Position are set properly. Ensure that the Span Switch is on.
Starting in the Weighing mode.
1. Press SPAN Switch to ON
2. Press and hold [RE-ZERO] while Pressing [8] [7] [1] [5]
3. With no weight on platter, press [
✱] key to Calibrate zero point.
4. Place weight on platter (e.g. 15lb.). Weight for calibration must >= 10% FS.
5. Enter weight [1] [5] example: 15lb. *Note
6. Press [✱] key to Calibrate Span.
After calibration (e.g. F.S = 15lb.). Scale goes back to Weighing mode.
*Note: When use full capacity weight for calibration, it is not necessary to enter weight data.
5.1.2 Escape from Maintenance mode (You May Exit The Maintenance Mode During The Calibration
Procedure As Shown Below.)
Starting in the Weighing mode.
The following procedure shows three examples of exiting from calibration prior to completing the process.
1a. Press SPAN Switch to ON
2a. Press [TARE] key to Exit to Weighing mode.
1b. Press SPAN Switch to ON
2b. Press and hold [RE-ZERO] While pressing [8] [7] [1] [5]
3b. Press [TARE] key to Exit to Weighing mode.
1c. Press SPAN Switch to ON
2c. Press and hold [RE-ZERO] While pressing [8] [7] [1] [5]
3c. With no weight on platter, press [
4c. Press [TARE] key to Exit to Weighing mode.
✱] key to Calibrate zero point.
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5.2. Specification Setting
5.2.1. Specification Enter (141)
Starting in the Weighing mode.
1. Press and hold [RE-ZERO] while pressing [1] [4] [1]
2. Press [++++] key to advance to the next Specification.
3. Press [−−−−] key. To return to previous Specification.
4. Press [0] [1] [0] [1], Only '1' & '0' keyboard entry is enable.
5. Press [
✱] key. To store Specification.
6. Press [TARE] key. Store SPECS to EEPROM & escape to Weighing mode.
5.2.2. Specification Enter (142)
NOTE: It can only work when SPAN SWITCH is on (Enable)
Starting in the Weighing mode.
1. Press SPAN Switch to ON
2. Press and hold [RE-ZERO] while pressing [1] [4] [2]
3. Press [++++] key to advance to the next Specification.
4. Press [++++] key to advance to the next Specification.
5. Press [0] [0] [1] [1]. Only '1' & '0' keyboard entry is enable.
6. Press [
✱] key to store Specification.
7. Press [−−−−] key to return to previous Specification.
8. Press [++++] key to advance to the next Specification.
9. Press [0] [1] [1] [1]. Only '1' & '0' keyboard entry is enable
10. Press [C] key
11. Press [1] [0] [1] [0]
12. Press [
✱] key to store Specification.
13. Press [++++] key to advance to the next Specification.
14. Press [TARE] key to Store SPECS to EEPROM & escape to Weighing mode.
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5.3. Internal Count & A/D Count Display
Starting in the Weighing mode.
1. Press and hold [RE-ZERO] while pressing [0] [0] [9], U Weight window display A/D (Span) Count,
TOTAL PRICE window display Zero Count.
2. Press [TARE] key to go back Weighing mode.
5.4. Specification List
5.4.1. For The Customer - (1 4 1)
SPEC No.BIT 3BIT 2BIT 1BIT 0
0Power auto off function (for no key operation & weigh operation)
0000 - Auto power off disable
0001 - 3 minute
0010 - 10 minutes
0011 - 30 minutes
0100 - 1 hour
0101 - 3 hours
0110 ~ 1111 - Not used
1 -Gross multi-interval
10 - 1/6000 Or 1/7500(15 lb/15kgonly)
11 - Not used
12Manual tare cancellation
0 – Allow,1 - Inhibit
13Digital tare
0 – Allow,1 - Inhibit
14AUTO tare clear when re-
Tare subtraction
0 – Allow,1 - Inhibit
Accumulation when tare
0 – Allow,1 - Inhibit
Tare AUTO clear
zero
0 - Allow
1 - Inhibit
15Accumulation
0 – Allow,1 - Inhibit
16Exit from accumulation
mode after 15 sec time out
0 – Allow,1 - Inhibit
0 - Allow
1 - Inhibit
Subtraction
0 – Allow,1 - Inhibit
Exit from accumulation
mode when weight
change
0 – Allow,1 - Inhibit
17Denomination rounding method for 3rd decimal digit
00 - No rounding 10 – Truncation
01 – Rounding 11 - Cut up
18-19
*Note1: Effective when accumulation operation is not performed or plural (multiple) denominations accumulation is
allowed by SPEC setting (SPEC15.1 = 0).
ZERO lamp "ON"
0 -Gross 0,
1 - Net 0
IR mode protected by
SPAN SW
0 – NO , 1 - YES
Negative weight display mask
00 - Minus gross > 9e
01 - Minus gross weight
10 - Minus net weight
11 - Not used
Program Unknown Coin Data (Recommended Method – Sampling Improves Accuracy) This is used if you
don’t know
the unit weight (unit weight per 1000 pcs) of the coins. For the best results use a known full bag of coin.
Starting in the Weighing mode.
1. Press and hold [RE-ZERO] while pressing [1] [2] [1]. To enter the Program mode.
2. Select the preset key number. Example: Press [F4] key for Quarters
3. Enter value of a coin. Example: Enter [0] [.] [2] [5] for Quarters
4. Press [✱] key to save the data. Scale switches to unit weight entry mode. Current unit weight is displayed.
5. Press [C] key to clear unit weight. Clear unit weight.
Unit weight entry by sampling.
9. Press [✱] key to save the data. To Save the data.
Removed samples, press [SHIFT] key to return to weighing mode.
Program Preset Tare Key
Starting in the Weighing mode.
1. Press and hold [RE-ZERO] while pressing [1] [2] [1]. To enter the Program mode.
2. Press [RECALL TARE] key. To program a preset tare key.
3. Select the preset key number. Example: Press [F1] key the Current tare value is displayed.
4. Enter value of a tare. Example: Enter [0] [.] [2] [7]
5. Press [✱] key to save the data.
6. Select the preset key number. Example: Press [F2] key
7. Press [C] key to clear tare data.
8. Press [✱] key to save the data.
9. Press [SHIFT] key to return to weighing mode
Operation Mode / One Touch Tare Subtraction
1. Place empty container (tare) (e.g. 0.27 lb.) on platter
2. Press [TARE] key to subtract the tare weight
Remove the tare weight
3. Press [TARE] key to clear the tare weight.
Basic Counting Operation
Starting in the Weighing mode.
1. Re-call the preset data. Ex. Press [F4] key for (25¢)
2. Place coins on platter.
Note: !If you wish to see the quantity of coins on the scale Press [QTY/AMT] key.
To Switch from $ Amount to Quantity of coin and from Quantity of coin to $ Amount in display
3. Remove the coins from platter.
4. To clear the recalled data. Press [C] key
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Page 17
DMC-688 Limited Warranty
Rice Lake Weighing Systems (RLWS) warrants that all RLWS equipment and systems properly installed by a
Distributor or Original Equipment Manufacturer (OEM) will operate per written specifications as confirmed
by the Distributor/OEM and accepted by RLWS. All systems and components are warranted against defects
in materials and workmanship for two (2) years.
RLWS warrants that the equipment sold hereunder will conform to the current written specifications
authorized by RLWS. RLWS warrants the equipment against faulty workmanship and defective materials. If
any equipment fails to conform to these warranties, RLWS will, at its option, repair or replace such goods
returned within the warranty period subject to the following conditions:
•Upon discovery by Buyer of such nonconformity, RLWS will be given prompt written notice with a detailed explanation
of the alleged deficiencies.
•Individual electronic components returned to RLWS for warranty purposes must be packaged to prevent electrostatic
discharge (ESD) damage in shipment. Packaging requirements are listed in a publication, “Protecting Your Components
From Static Damage in Shipment,” available from RLWS Equipment Return Department.
•Examination of such equipment by RLWS confirms that the nonconformity actually exists, and was not caused by
accident, misuse, neglect, alteration, improper installation, improper repair or improper testing; RLWS shall be the sole
judge of all alleged non-conformities.
•Such equipment has not been modified, altered, or changed by any person other than RLWS or its duly authorized repair
agents.
•RLWS will have a reasonable time to repair or replace the defective equipment. Buyer is responsible for shipping charges
both ways.
•In no event will RLWS be responsible for travel time or on-location repairs, including assembly or disassembly of
equipment, nor will RLWS be liable for the cost of any repairs made by others.
THESE WARRANTIES EXCLUDE ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED,
INCLUDING WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE. NEITHER RLWS NOR DISTRIBUTOR WILL, IN ANY EVENT,
BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES.
RLWS AND BUYER AGREE THAT RLWS’S SOLE AND EXCLUSIVE LIABILITY HEREUNDER
IS LIMITED TO REPAIR OR REPLACEMENT OF SUCH GOODS. IN ACCEPTING THIS
WARRANTY, THE BUYER WAIVES ANY AND ALL OTHER CLAIMS TO WARRANTY.
SHOULD THE SELLER BE OTHER THAN RLWS, THE BUYER AGREES TO LOOK ONLY TO
THE SELLER FOR WARRANTY CLAIMS.
No terms, conditions, understanding, or agreements purporting to modify the terms of this warranty shall have any legal effect unless
made in writing and signed by a corporate officer of RLWS and the Buyer.