Digi DI-28 Operation Manual

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DI-28 SERIES OPERATING MANUAL

SECTION INDEX PAGE NUMBER

1.0. GENERAL 2

1.1. Description 2

2.0. SPECIFICATIONS 3

2.1. Platforms & Capacities 3

2.2. Technical 4

3.0. INSTALLATION 5

3.1. Unpacking 5

3.2. Inspection 5

3.3. Repackaging 5

3.4. Mini Grand Unlocking Procedure 5-7

3.5. Mini Grand Assembly 8-9

4.0. ELECTRICAL TEST 10

4.1. Set-Up Procedure 10

4.2. Keyboard & Display Test 10

4.3. Control Panel 11

4.3.1. Lamps 11

4.3.2. Keys 11

5.0. OPERATION PROCEDURE 12

5.1. Power On 12

5.2. Tare Subtraction 12

5.2.1. One Touch Tare 12

5.2.2. Digital Tare 12

5.3. Battery Life Check 12

5.4. Set Point Value Entry 13

5.5. Changing Weight Units 13

6.0. PROGRAMMING 14

6.1. DI-28 Key Function Summery 14

6.2. Internal Count 14

6.3. Set Up And Calibration 15

6.4. Specification List 15-17

6.5. Span Adjustment 17-18

6.6. Span Enable Switch 18

7.0. DI-20 OPTIONS 19

7.1. Battery Option 19

7.2. Set Point Output, & Setpoint Wiring 21

7.3. RS-232, RS-232 Wiring 21-27

8.0. MAINTENANCE, CALIBRATION, TEST PROCEDURE, SERVICE 28

8.1. Maintenance Procedures 28

8.2. Service & Repair

8.3. Load Cell Wiring 29

8.4

Limited Warranty 30

29

1

DI-28 OPERATING MANUAL

1.0. GENERAL

1.1. Features

The DI-28 Indicator offers a practical solution to a wide range of weighing applications.
There are a variety of weight capacities and increments available. The display resolution
is selectable from 1/2000 to 1/7500. It features RS-232 & 4 Setpoint outputs (factory
options) and keyboard calibration with auto-span. It operates on 6 “C” cell batteries or
with its AC/DC adapter. The DI-28 is able to support single load cells that have an output
range of 0.4mV/V to 4.0mV/V and is able to support up to 4 load cells when used with
the AC/DC adapter. This indicator features ON/OFF, REZERO, TARE, for both one
touch and digital key operation. A recharging circuit is incorporated for use with
rechargeable NiCAD batteries. For a list of platforms sizes and available capacities see
page 3.

This instruction manual will provide the user with all the information necessary to
understand, set-up and operate the DI-28 scale. Included in this manual are descriptions,
specifications, drawings, and operating instructions.

2

2.0. SPECIFICATIONS

This section includes a detailed listing of all pertinent specifications and parameters for each of
the DI-28 weighing scales. The system weighing accuracy is 0.02 % for all models and they
meet or exceed the requirements of OIML Class III and NIST Handbook, Number 44.

2.1 Platforms

The following is a list of platforms :

Model Platform

Size/Platter

S-AL bench 12” x 14” x3” 1 LB. 5 LB. 10 LB. 25 LB. 50 LB.

S-SL bench / floor 13” x 17” 60 LB. 150 LB. 300 LB.
S-TL floor 17” x 21” 150 LB. 300 LB. 500 LB. 1000 LB.
S-UL floor 24” x 28” 150 LB. 300 LB. 500 LB. 1000 LB.

S-PL floor 30” x 30”

36” x 36”

S-PL floor 48” x 48”

48” x 72”
60” x 60”
60” x 84”

Ramps , Other Capacities And Stainless Steel Platforms Also Available

Choosing A Capacity :Decimal Location (*) Minimum Weight (*) Display Resolution (=) Capacity

Decimal

Location

Minimum

Weight

Display

Resolution

Available

Capacities

0.0000 1 1 / 2000 1lb,2.5lb,3lb.,5lb.,6lb,.

0.000 2 1 / 2500 10lb.,25lb.,30lb.,50lb.,

0.00 5 1 / 3000 60lb.,75lb.,100lb.,125lb

0.0 1 / 5000 150lb.,200lb.,250lb.,
0 1 / 6000 300lb.,375lb.,500lb.,

1 / 7500 600lb.,750lb.,1000lb.,
1500lb.,2000lb.,2500lb.
3000lb.,3750lb.,5000lb.
6000lb.,7500lb.,10000lb

Example: dec. loc. (*) min. wt. (*) disp. res. = avail cap.

0.00 (*) 5 (*) 1 / 7500 = 375. 00 lb.
* Units can be programmed to primarily weigh in lb., oz., kg., g., or dwt.

Capacities

1000 lb. to 3000 lb.

2500 lb.

to

25000 lb.

3

2.2. SPECIFICATIONS Technical

2.2.1. Id Plate :
Model # DI-28
Serial #
Power Dissipation .3w
Voltage Battery size C 6x1.5v or 12v AC Adapter

2.2.2. Operating Conditions :
Power source : AC/DC adapter (12V, Digi Model PS-100 only, See 2.2.4.

below) or 6x 1.5V size C battery, alkaline or rechargeable.

Temperature Range : -10° to +40° C.
Humidity : 15% to 85% R.H.
Power Consumption : 0.3 to 1.5 Watts.

2.2.3. Display Specifications

Display Device: LCD (Liquid Crystal Display)
Character Height, 25mm.

No. of Digits: 6 Digits (including minus sign digit)

2.2.4. AC/DC Adapter Specifications

a) 9.5±0.5mm
b) Inside 2.1±0.5mm
Outside 5.5±0.5mm

−−−−

++++

a

b

4

3.0. INSTALLATION

This section provides the information required for installation of the DI-28 weight indicator.
The following steps accomplish installation.

1. Unpacking

2. Set-up Procedure

3.1. Unpacking

Each component of the DI-28 is packed in a specially designed carton. Remove each
component from the 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 shipment of the scale is required.

3.2. Inspection

Immediately after unpacking, a visual inspection of the instrument should be performed.
If any damage has been incurred during transportation the shipper and DIGI MATEX
INC. should be notified immediately. Instructions for assessment of damage and further
procedures will then be determined.

3.3. Repackaging

If, at anytime, the DI-28 weight indicator 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. Platform Unlocking Procedure

The unlocking procedure is different for each style of platform and is included on
the following pages.

3.5. Mini Grand Pole Assembly

The optional pole mounting kit comes with all the necessary hardware and assembly
is easy. See pages 8 & 9 for details.

5

3.4.1. Unlocking Procedure

6

3.4.2. Unlocking Procedure

7

3.5.1. Mini Grand Assembly

8