Rice Lake DIGI DS-520 User manual

73366
DS-520
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DS-520 SERIES OPERATING MANUAL
INDEX
SECTION PAGE
NUMBER
1.0 GENERAL 2-3
1.1. Features 2
1.2. Keyboard & Display Layout 2
1.3. Key Switch Information 3
1.4. Indicator Lamp Information 3
2.0 SPECIFICATIONS 4
2.1 Technical Specifications 4
3.0 INSTALLATION 5-6
3.1 Un-packing 5
3.2 Inspection 5
3.3 Re-packing 5
3.4 Un-locking Procedure 5-6
4.0 DS-520 OPERATIONAL PROCEDURES 7-8
4.1. Power On/Off 7
4.2. Automatic Shut Off 7
4.3. Re-zero 8
4.4. Tare Reduction 8
5.0 MAINTENANCE MODE 9-12
5.1. Spec Entry 9
5.2. Spec Entry and Span Adjustment 9-10
5.3. Internal Count and A/D Count Display 10
5.4. Spec List 11
5.5. Error Messages 11
5.6. Maintenance, Calibration, Test Procedures & Service 12

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1.0. GENERAL
1.1. Features
•Wash down (IP-65) digital weighing scale
•Quick response to weight changes
•Capacity: 60 lb, 150 lb, 300 lb
•Resolution:
A. Display resolution1/1000 (multi range) internal res.1/6000
B. Display resolution1/3000 (single range) internal res. 1/24000
•Low power consumption : 6 x C cell batteries for more than 200 hours of continuous
use
•Fast self test procedure when power on
•Selectable automatic shut off time which prolongs battery life
•Two point low battery detect:
A. When battery is weak, the battery indicator will light
B. When the power from the battery becomes too low to weigh accurately, all displays
will shut off except the battery indicator. The power is shut off after 1 minute.
•Calibration by software
•High contrast LCD display
•3 keys REZERO key, TARE key, ON/OFF key
•Stainless steel platform and indicator housing
1.2. Keyboard & Display Panel Layout

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1.3. Key Functions
•REZERO Key Reset weight display to zero
•TARE Key Set or clear a tare
•ON/OFF Key Turn the power ON or OFF
1.4. Indicators Lamps
•Zero On when zero point is adjusted and when weight is stable
•Net On when tare reduction is performed
•Battery On when battery is weak

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2.0. SPECIFICATIONS
2.1.1. Technical Specifications
This section includes a detailed listing of all pertinent specifications
and parameters for the DS-520 weighing scales. The system weighing
accuracy is 0.03 % . All models meet or exceed the requirements of
OIML, Class III, and NIST Handbook, Number 44.
2.1.2. Operating conditions
•Power source 12VDC w/DC adapter or 9VDC w/6 “C” cell battery
•Operating temperature -10°C ≈+40°C (OIML)
•Operating humidity 15 – 85% RH
•Power consumption 0.07w when 6V, 0.1w when 9V
2.1.3. Analog specification
•Input sensitivity 0.67mV/V- 10kg & 20kg, all other capacities 1mV/V
•Zero adjust range 40% Full Scale
•Zero balance range 10% Full Scale
•L/C applied voltage DC 5V
•Speed of A/D conversion 4 times /sec.
•Internal resolution 16000 or 24000
2.1.4.Display Specification
•Weight display 6 digits with ZERO, TARE, LOW BATTERY indication
•Spec Display 6 digits
•Decimal Point Spec Selectable
2.1.5. Dimensions
•Platter size 16"L x 16"W x 4 _"H
•Overall size 22 _"L x 16"W x 4 _"H
•Tall column 18 _"L x 16"W x 36" Overall height
2.1.6. External connectors
•DC receptacle

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3.0. INSTALLATION
This section provides the information required for installing this weighing system
for operation. The following steps accomplish installation.
1. Unpacking
2. Set-up Procedure
3.1. Unpacking
Each component of the DS-520 system is packed in a specially designed carton.
Remove each component from its carton, separate the component from its
polystyrene shell assembly and set aside. Inspect the carton interior to be sure
that all accessories have been removed from the carton. Inspect the carton inner
panels for accessories.
NOTE: Be sure to repack all materials within the carton set. Store the cartons in a secure area so they
can be available whenever future shipment of the scale is required.
3.2. Inspection
Immediately after unpacking, a visual inspection of the scale should be performed.
If any damage has been incurred during transportation notify the shipper and Rice Lake
Weighing systems immediately. Instructions for assessment of damage and further
procedures will then be determined.
3.3. Repackaging
If, at anytime, the DS-520 weighing scale must be returned for modification,
calibration, or repair, be sure that it is properly packed with sufficient cushioning
materials. Whenever possible, the original carton assembly should be retained for
this purpose. Any damage caused by improper packaging will not be covered by
warranty.
3.4. Unlocking Procedure
The unlocking procedure is included on the next page. The DS-520 should
be properly locked whenever it is being transported. See next page for un-locking
procedure.
NOTES:
•Remove 4 M6 screws and lock bracket as shown on page 6. Also check the overload stop. Ensure
that nut is screwed tightly.
•Locking procedure should include tightening nut until it fully stops.

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Unlocking Procedure (Continued)

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4.0. DS-520 OPERATIONAL PROCEDURES
4.1. Power On/Off
1. Press [ON/OFF] key to turn on the scale.
The display will briefly show all segments, then blank for a second, then go into weighing mode.
2. Press [ON/OFF] key to turn off the scale.
4.2. Automatic Shut Off Timer Setting
1. Begin with the scale turned off.
2. Press and hold the [ON/OFF] key for 3 seconds. This sets the Timer for 3 minutes.
3. Release the [ON/OFF] key when the display shows the number 3. The display will then briefly
show all segments, then blank for a second, then go into weighing mode.
1. Begin with the scale turned off.
2. Press and hold the [ON/OFF] key for 6 seconds. This sets the Timer for 10 minutes.
3. Release the [ON/OFF] key when the display shows the number 6. The display will then briefly
show all segments, then blank for a second, then go into weighing mode.
1. Begin with the scale turned off.
2. Press and hold the [ON/OFF] key for 9 seconds. This sets the Timer for no auto shut off.
3. Release the [ON/OFF] key when the display shows the number 999. The display will then
briefly show all segments, then blank for a second, then go into weighing mode.

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4.3. Rezero
Example 1 Begin in the weighing mode with the scale showing 0.00 Example based on 60 lb
scale.
1. Place 20 lb on the scale.
2. Press the [REZERO] key. The display will show all segments briefly, then go to 0.00
Example 2 Begin in the weighing mode with the scale showing 0.00 Example based on 60 lb
scale.
1. Place 25 lb on the scale.
2. Press the [REZERO] key. The display will show all segments briefly, then go to 25.00.
25lb exceeds the 40% limit of the rezero range.
4.4. Tare
Example : Begin in the weighing mode with the scale showing 0.00 Example based on 60 lb.
scale.
1. Place 20 lb on the scale.
2. Press the [TARE] key. The display will go to 0.00
3. Remove weight from scale. The display will go to -20.00
4. Press the [TARE] key. To clear the tare

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5.0. MAINTENNCE MODE
5.1. Specification Entry
Example : Begin in the weighing mode with the scale showing 0.00
1. Press and hold [REZERO] key, while holding the [REZERO] key, press [TARE] [TARE]
[ON/OFF] then release the [REZERO] key. The display will show all 8’s while holding the
[REZERO] key, when the [REZERO] key is released the scale will be in the Maintenance Mode.
2. Press the [TARE] key. The display will show the software version.
3. Press the [TARE] key. The display will show S0 0 0 0 (spec 0 = 0 0 0)
4. Press the [ON/OFF] key. To change spec data (0 0 0 – 1 1 1)
Ex: Press [ON/OFF] S0 0 0 1, Press [ON/OFF] S0 0 1 0, Press [ON/OFF] S0 0 1 1,
5. Press the [TARE] key. To store spec data and advance to the next spec. S1 0 0 0
6. Press the [REZERO] key. To save specs to memory and return to the weighing mode.
5.2. Specification Entry and Span Adjustment
Example : Begin in the weighing mode with the scale showing 0.00
1. Press and hold [REZERO] key, while holding the [REZERO] key, press [TARE] [TARE]
[ON/OFF] then release the [REZERO] key. The display will show all 8’s while holding the
[REZERO] key, when the [REZERO] key is released the scale will be in the Maintenance Mode. The
display will show d5-671.
2. Press the [TARE] key. The display will show the software version.
3. Press the [TARE] key. The display will show S0 0 0 0 (spec 0 = 0 0 0)
4. Press the [ON/OFF] key. To change spec data (0 0 0 – 1 1 1)
Ex: Press [ON/OFF] S0 0 0 1, Press [ON/OFF] S0 0 1 0, Press [ON/OFF] S0 0 1 1,

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5. Press the [TARE] key. To store spec data and advance to the next spec. S1 0 0 0
6. Press the [TARE] key. To store spec data and advance to the next spec. S2 0 0 0
7. Press the [TARE] key. To store spec data and advance to the next spec. S3 0 0 0
8. Press the [TARE] key. The display will show CAL 00
9. No Weight Should Be On Platter. Press the [TARE] key. The display will show - - - - - - - while the
scale calibrates the zero point. When zero is calibrated the display will show
CAL SP
10. Place Capacity Weight On Platter. Press the [TARE] key. The display will show - - - - - - while
the scale calibrates the span. When span is calibrated the scale will return to the weighing mode.
60.00
NOTE: To exit maintenance mode, Press the [REZERO] key at any step except when - - - - - - are
displayed.
5.3. Internal Count Display :
Example : Begin in the weighing mode with the scale showing 0.00
1. Press and hold [REZERO] key, while holding the [REZERO] key, press [TARE] [TARE]
[ON/OFF] then release the [REZERO] key. The display will show all 8’s while holding the
[REZERO] key, when the [REZERO] key is released the scale will be in the Maintenance Mode. The
display will show d5-671.
2. Press the [ON/OFF] key. To display the Internal (Span) Count
3. Press the [ON/OFF] key. To display the Internal (Zero) Count
4. Press the [ON/OFF] key. To display the Internal(Span) Count
5. Press the [TARE] key. To store spec data and advance to the next spec. S1 0 0 0

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5.4. Specification List
Spec no. Bit 2 Bit 1 Bit 0
S0 Decimal Point Position
0 0 0 = no decimal point 1 0 0 = 5th digit (00.0000)
0 0 1 = 2nd digit (00000.0) 1 0 1 = 6th digit (0.00000)
0 1 0 = 3rd digit (0000.00) 1 1 0 – 1 1 1 = not used
0 1 1 = 4th digit (000.000)
S1 Decimal Point Type
0 = period
1 = comma
ZERO Lamp “ON”
0 = gross 0
1 = net 0
Zero Tracking when
Tare
0 = no , 1 = yes
S2 Minimum Display
0 0 0 = 1 0 1 0 = 5 1 0 0 = 20
0 0 1 = 2 0 1 1 = 10 101-111 not used
S3 Display Resolution
0 0 = 1/1000 (multi-Interval)
0 1 = 1/2000 (single-interval)
1 0 = 1/3000 (single-interval)
1 1 = not used
Multi-Interval Setting
0 = net multi- interval
1 = gross multi-interval
S4 Not Used
S5 Not Used
S6 Auto Tare Clear V 1.21
0=yes, 1=no
5.5. Error Message List
The following message will appear when an invalid operation is performed
Message Remark Appropriate Operation
OF When displayed weight on scale exceeds capacity by +9d,
or weight is on platter when power up Remove weight from scale
UF When displayed minus weight >= 9d Rezero scale, turn off and on
888888 A/D checking error or scale not stable on power up. Place scale on firm flat
surface and level it.
ERROR
Calibration is not correct, or A/D checking error on power
up Repeat calibration procedure
0.00
∇∇
∇∇
Low battery indication when input voltage is low. Change batteries or check
power supply
∇∇
∇∇
Weight Display blanks when voltage is below min. level.
Low battery indication goes off as the battery is drained. Change batteries or check power supply

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5.6. Maintenance, Calibration, Test Procedure & Service
This section contains information and instructions concerning maintenance of the DS-520
Weighing Scale.
Preventive maintenance consists of periodically cleaning the external surfaces of the instrument
and should be performed as often as operating conditions warrant.
The calibration procedure is designed to be an aid in maintaining the scale accuracy within
specifications. The calibration procedure may also serve as a performance test procedure.
CAUTION: DO NOT ATTEMPT ANY SERVICE WHILE THE INSTRUMENT IS
CONNECTED TO THE POWER SOURCE.
5.6.1. Maintenance Procedures
5.6.1.1. EXTERIOR MAINTENANCE
The exterior surfaces of the counting scale can be easily cleaned using soap and water.
For grease or other difficult spots, a chlorothane or naptha based cleaner may be used.
5.6.1.2. Internal Maintenance
Internal maintenance is not normally required and if it is, should not be attempted except
by a qualified, authorized service technician.
5.6.2. Calibration
The following procedure should be followed periodically (every six to twelve months is
suggested) to determine that the scale is functioning in all modes.
A. Electrical
Follow section 4.0 through all its steps
B. Accuracy
Weighing: The scale weighing accuracy can be determined by applying various known
weights to the platform. Because of the scale's very high accuracy, only weights that are
certifiably more accurate than the scale's specifications should be used in testing for
accuracy. (NIST class "F" or higher)
Since the scale owner does not normally have such certifiable weights available, it is suggested
that the customer call their authorized DIGI dealer.
5.6.3. Service & Repair
No service or repair should be attempted except by qualified personnel, and not until it has
been positively determined that the weighing scale requires such service. All service
should be done in a clean, dry, dust-proof area.

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DS-520 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 non-conformity, 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 non-conformity 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.
© 2003, Rice Lake Weighing Systems, Rice Lake, WI USA. All rights reserved
RICE LAKE WEIGHING SYSTEMS • 230 WEST COLEMAN STREET • RICE LAKE, WISCONSIN 54868 • USA