Symbol QRG 7875 User Manual

7875 Scanner/Scale

7875 Scanner / Scale

 1999 SYMBOL TECHNOLOGIES, INC. All rights reserved.
Symbol reserves the right to make changes to any product to improve reliability,

function, or design.
Symbol does not assume any product liability arising out of, or in connection with, the

application or use of any product, circuit, or application described herein.
No license is granted, either expressly or by implication, estoppel, or otherwise under

any patent right or patent, covering or relating to any combination, system, apparatus,
machine, material, method, or process in which Symbol products might be used. An
implied license only exists for equipment, circuits, and subsystems contained in Symbol
products.

Symbol is a registered trademark of Symbol Technologies, Inc. Other product names
mentioned in this manual may be trademarks or registered trademarks of their
respective companies and are hereby acknowledged.

Symbol Technologies, Inc.
One Symbol Plaza
Holtsville, N.Y. 11742-1300

http://www.symbol.com

Quick Reference

Installation Steps

When installing the 7875 Scanner/Scale, follow the installation
steps below. Skip step 4 if the unit does not have a scale.

1. Verify Checkstand Preparation, see page 1

- Checkstand Cutout

- Display Clearance

- Service Clearance

-Item Diverter

- Ventilation Requirements

- Electrical Wiring

- Cable Hole Requirements.

2. Connect the Cables, see page 7

- Power Supply

- Remote Display

- Interface Cables

- RS-232 Peripheral Cable.

3. Install 7875 in Checkstand, see page 10

- Set Communications Protocol Switch

- Put the 7875 in Checkstand Cutout

- Align the 7875 to the Checkstand.

4. Calibrate the Scale, see page 13

- Access Calibration Switch

-Exercise the Scale

- Perform Calibration

- Validate the Calibration

- Secure Calibration Switch.

5. Check the Scanner Operation, see page 20

- Modify Program Parameters

- Scan Valid Bar Code Tags.

1

7875 Scanner / Scale

Verify Checkstand Preparation

Checkstand Cutout 7875-1000/2000

C

D

I

H

DD
CC

E
B

ABCDE

7875-1000
Scanner

7875-2000
Scanner/Scale

29.51 cm 50.95 cm 3.49 cm 0.95 cm 43.97 cm
11 5/8 in. 20 1/16 in. 1 3/8 in. 3/8 in. 17 5/16 in.

30.63 cm 50.95 cm 3.49 cm 1.27 cm 43.97 cm
12 1/16 in. 20 1/16 in. 1 3/8 in. 1/2 in. 17 5/16 in.

FGHI

7875-1000
Scanner

7875-2000
Scanner/Scale

3.49 cm 13.0 cm 18.10 cm 18.42 cm
1 3/8 in. 5 1/8 in. 7 1/8 in. 7 1/4 in.

3.49 cm 13.0 cm 17.78 cm 18.42 cm
1 3/8 in. 5 1/8 in. 7 in. 7 1/4 in.

B
E

C

A

*F

A

No electronics under 7875

F

* Recommended shelf to catch the 7875 if
dropped during installation, although 7875
must not be supported by this shelf.

G

2

Quick Reference

Note: Dimension A for a 7875-2000 includes a spacer along

the side of the unit so that it fits an existing 7870-2000
cutout.

Checkstand Cutout – 7875-3000

D

H

G

D

C

E
B

ABCD

29.51 cm 40.96 cm 3.49 cm 0.95 cm
11 5/8 in. 16 1/8 in. 1 3/8 in. 3/8 in.

EFGH

37.34 cm 12.54 cm 18.10 cm 18.42 cm
14 3/4 in. 4 15/16 in. 7 1/8 in. 7 1/4 in.

C

No electronics under NCR 7875

B

A

A

F

Note: The 7875-3000 must sit on a shelf below the checkstand

surface. The shelf should be open at the front and back.

3

7875 Scanner / Scale

t

Display Clearance

50

30

This area must b e clea r
for viewing optional
integrated display.

60

Service Clearance

Mounting surface for keyboard mus
be removable for servicing and
vertical window replacement.

B

A

All Installations

A

8.0 in. (20.3 cm) minimum if checkstand structure is not removable
for servicing. 1.0 in. (2.5 cm) minimum if checkstand structure is re­movable for servicing.

B

14.0 in. (35.6 cm) minimum if checkstand structure is not removable
for servicing. 7.0 in. (17.8 cm) minimum if checkstand structure is re­movable for servicing.

C

5.1in. (13.0 cm) minimum clearance to closest checkstand panel.

7875

must not be supported by this panel.

A

Installations Without Integrated Display

60

C

The

4

Quick Reference

Item Diverter

7.25 in. (18.4 cm)

Item Diverter
(Must be removable to service
Scanner/Scale in checkstand)

Ventilation Requirements

The 7875 Scanner/Scale is designed to operate without an exhaust
fan in the checkstand; however, there must be adequate convection
airflow. The ambient temperature inside the checkstand cannot be
higher than 104° F (40° C). Also, the ambient temperature inside
the checkstand cannot be higher than 12.6° F (7° C) above the
ambient temperature outside the checkstand. For example, if the
ambient temperature outside the checkstand is 76° F (24.4° C), the
ambient temperature inside the checkstand cannot be greater than

88.6° F (31.4° C). If the checkstand contains other heat producing
equipment, you may need to use forced air to keep the temperature
within the specified range. However, air coming into or leaving the
checkstand

MUST NOT

enter or exit past the 7875 Scanner/Scale.

5

7875 Scanner / Scale

Electrical Wiring to the Checkstand

Input Voltage

Neutral and
Ground Bus

L3

Main Service
Panel

N

G

Conduit

Circuit A: Checkstand

Note:

Feeder wiring and insulated ground from
main service panel to distribution panel
to be run in metal conduit.

Belt Control

Lighting

Misc. equip.

The electrical wiring must meet all
electrical codes, laws and regulations.

Motor

Checkstand
Frame

Belt

Isolated/Insulated
Ground Bus

Neutral
Bus

Distribution Panel

L2

L1

Circuit Breakers

Symbol circuits should be run in
separate metal conduits.

Note:

Circuit B: Terminal

Circuit C: Scanner/Scale

Receptacle should be easily
assessible and near the
Scanner/Scale.

Isolated Ground Receptacles

Symbol circuits must be dedicated to
Symbol equipment or other logically
connected electronic equipment
(modems, DAA, bridges, etc.)

Installation Type Input Voltage L1, L2 Circuit Breakers

U.S., Canada,
Japan
International 220 VAC to

100 VAC to
120 VAC

240 VAC

100 VAC to
120 VAC

220 VAC to
240 VAC

Standard single-pole;
value determined by
type of device branch
and by electrical code.

European 220 VAC 220 VAC European double-pole.

6

Quick Reference

Note: The 7875 outlet in the checkstand must be connected to

a circuit breaker switch. This switch must be located
close to the operator and is used as the On/Off switch
for the 7875.

Hole Requirements for Cables

To run the various cables through the checkstand, you may need to
drill holes in some of the panels. The holes must be large enough for
the connector on one end of the cable to pass through. Ensure there
are no sharp edges to cut the cable. The following table gives the
minimum hole size for each of the 7875 cables.

Cable Cable Length Minimum Hole Size

Power Cord – Outlet
to Power Supply

Power Cord – Power
Supply to the 7875

Interface Cable 8.0 m (26.24 ft.)

Remote Display Cable 8.0 m (26.24 ft.)

3.05 m (10 ft.) 3.18 cm (3/4 in.)

1.22 m (4 ft.) 1.52 cm (1/2 in.)

1.90 cm(3/4 in.)

4.0 m (12.12 ft.)

4.0 m (12.12 ft.)

1.90 cm (3/4 in.)

1.90 cm (3/4 in.)

1.90 cm (3/4 in.)

Connect the Cables

There are several cables associated with the 7875, some required
with every installation and some optional, depending on the system.
Make sure you have all the necessary cables for your installation.
Connect the cables according to one of the following two
illustrations.

7

7875 Scanner / Scale

Single Cable Installation

AC
Power
Cord

Power
Supply

DC Power
Cable

Remote
Display

Check switch settings

C

R

Y

E

D

E

T

A
L

O

W

P

M

O

E

IS

P

R

D

R

X

E

A

N

M

N
A

A

C

5

S

V
5

7875
Scanner/Scale

Interface Cable

Host Terminal

DUAL PERIPHERAL PORTS

PORT 1

PORT 2

RS-232
Peripheral

8

Quick Reference

Dual Cable Installation

AC
Power
Cord

Power
Supply

DC Power
Cable

Remote
Display

Chec k switch sett ing s

C

Y

R

E

D

T

E

A
L

O

W

P

M

O

IS

E

P

D

R

Scanner
Interface
Cable

X
A
M

A
5

V
5

/

R

T

E

R

N

O

N
A

P

C

X

S

U
A

7875
Scanner/Scale

Scale Interface
Cable

Host Terminal

DUAL PERIPHERAL PORTS

R
K
H

C
A
T
A
D

PORT 1

PORT 2

RS-232
Peripheral

9

7875 Scanner / Scale

RS-232 Peripheral Cables

The cable on some RS-232 hand-held peripheral devices is not long
enough to connect to the 7875 (under the checkstand) and still
permit easy use of the device. In these cases, Symbol recommends
installing an extension cable. You can obtain one from Symbol or
you can make your own. If you make your own, it should be
approximately 39 inches (1 meter) long with 8-pin phone type
connectors on each end.

J1 P1

J1 Wire Number P1

111

222

333

444

555

666

777

888

Install 7875 in Checkstand

Set the Communications Protocol Switch

Before setting the 7875 into the cutout in the checkstand, verify that
the Communications Protocol Switch is properly set. Single cable
units have one switch, dual cable units have two. The switches are
located on the Interface Board and you can access them through
holes in the side of the unit. For RS-232 communications, both
switches must be toward the front (operator side) of the unit. For all

10

Quick Reference

other communication protocols, both switches must be toward the
back (customer side) of the unit.

AUX PORT/
DATACHKR

DATACHKR OCIA/IBM

RS-232 RS-232

Make sure power is
off before changing
switch setting

Switches

SCANNER

Installing 7875 into Checkstand Cutout

Grasp the 7875 Scanner/Scale and lower it into the checkstand
cutout. Be careful not to damage any of the cables. After the unit is
properly sitting on its supports, install the Top Plate.

Note: It is important that the 7875 does not rock on its sup-

ports. Make sure all adjustable supports are securely
fastened and that the 7875 is sitting on all supports.

11

7875 Scanner / Scale

Align the 7875 to the Checkstand

The leading edge of the Top Plate must be flush or up to 1/16 in.
(0.15 cm) below the top of the checkstand. The trailing edge of the
Top Plate must be flush or up to 1/16 in. (0.15 cm) above the top of
the checkstand.

Note: The four adjustable support posts on the Scale Hinge

Assembly are set at the factory. Do not attempt to adjust
the Top Plate using these posts. Adjust the 7875 sup­ports to align the Top Plate with the checkstand.

If the Top Plate is properly aligned with the checkstand, an item
should easily slide from the checkstand onto the Top Plate and then
from the Top Plate onto the checkstand. The following illustration
shows this alignment.

12

Quick Reference

Low Surface

High Surface

Correct Alignment

Bad Alignment

Scanner Too High

Bad Alignment

Scanner Too Low

Low Surface

High Surface

Calibrate the Scale

Note: To comply with governmental weights and measures

regulations, you must be certified to perform the cali­bration function. Also, you MUST calibrate the scale
when you install an 7875 Scanner/Scale.

Note: Your 7875 Scanner/Scale may not have an integrated

display, and may not have a remote display when con­nected to some host terminals. If this is the case, a Field

13

7875 Scanner / Scale

Service Calibration Display is required unless your 7875
has voice enabled. Calibration information is NOT sent
to the host terminal. Contact your Symbol representa­tive about calibrating the scale.

Note: The interface cable between the 7875 and host terminal

must be disconnected during calibration. Some hosts
may cause interference that invalidates scale calibration.

You can calibrate the scale after power is supplied for 30 minutes if
the ambient air conditions are 68° F (20° C) for at least 24 hours. If
this condition has not been met, the scale must be on for at least 6
hours before you can calibrate it. Also, you must use a certified
weight set to calibrate and certify the scale.

The EEPROM on the scale board maintains an audit trail of scale
calibration and programming activity. The audit trail contains an
event counter that records the number of times the scale has been
calibrated. You can display the audit trail count on an integrated,
remote, or Field Service Calibration Display by pressing the Scale
Zero Button on the Operator Display Panel. The display alternates
between Cal xxx and PAr xxx.

Exercise the Scale

You must exercise the scale before performing a calibration. Add
and remove weight to your scale in the order provided in the
following chart. In this building procedure you start with no weight
(0) and sequentially add and remove weight to obtain the values
shown in the chart. Perform this procedure four times

We ig h t

Feature Total Weight on Top Plate

9.995 kg 0.0 kg 2.5 kg 5.0 kg 10. 0 kg 5.0 kg 2.5 kg 0.0 kg

13.995 kg 0.0 kg 2.5 kg 5.0 kg 15.0 kg 5.0 kg 2.5 kg 0.0 kg

30.0 lb. 0.0 lb. 5.0 lb. 15.0 lb. 30.0 lb. 15.0 lb. 5.0 lb. 0.0 lb.

.

14

Quick Reference

Access the Calibration Switch

The Calibration Switch is located below the Top Plate. Remove the
Top Plate to access to the Calibration Switch cover. Lift the cover up
to remove.

Calibration

Switch Cover

Remove the screw that secures the Calibration Switch cover. Also
remove the seal if one is present. Rotate the Calibration Switch
cover to access to the Calibration Switch.

Calibration Switch

Security Cover

Screw

Wire Seal

Calibration

Switch

15

7875 Scanner / Scale

Calibrate the Scale

1. Press the Scale Zero Button to display the Cal and PAr values.
Record these values.

2. Access the Calibration Switch, then place the top plate on the
unit before pressing the switch. Raise the front edge of the Top
Plate just enough to reach the switch.

3. Press the switch, then immediately lower the Top Plate into
position. The display should show

Ready C-00 kg (00 lb.)

.

4. Follow the steps in the following chart.

Display Add Weight Remove Weight

Ready C-2.5 kg (05 lb.) 2.50 kg (5.00 lb.)
Ready C-05 kg (15 lb.) 2.50 kg (10.00 lb.)
Ready C-10 kg (30 lb.) 5.00 kg (15.00 lb.)
Ready C-00 kg (00 lb.) 10.00 kg (30.00 lb.)
Ready 0.000 kg (0.00 lb.)

Verify the Calibration

The scale accuracy test meets government requirements of testing
the accuracy of the scale after performing a scale calibration. It
contains a series of four tests that must be run in the continuous
sequence given.

Increasing Load Test

This test checks the scale’s accuracy when incrementally adding
weight to the center of the top plate. Use weights that correspond to
the 7875 weight feature

Weig ht

Step

1 9.995 kg 0.1 kg 0.1 ± 0.00 kg

Feature Add Weight

13.995 kg 0.1 kg 0.1 ± 0.00 kg

30.0 lb. 0.2 lb. 0.2 ± 0.00 lb.

.

Remove

Weight Display Result

16

Quick Reference

Step

2 9.995 kg 2.5 kg 0.1 kg 2.5 ± 0.00 kg

3 9.995 kg 2.5 kg 5.0 ± 0.005 kg

4 9.995 kg 2.5 kg 7.5 ± 0.005 kg

5 9.995 kg 2.495 kg 9.995 ± 0.005 kg

Weigh t

Feature Add Weight

13.995 kg 2.5 kg 0.1 kg 2.5 ± 0.00 kg

30.0 lb. 5.0 lb. 0.2 lb. 5.0 ± 0.00 lb.

13.995 kg 4.5 kg 7.0 ± 0.005 kg

30.0 lb. 5.0 lb. 10.0 ± 0.01 lb.

13.995 kg 3.0 kg 10.0 ± 0.005 kg

30.0 lb. 10.0 lb. 20.0 ± 0.01 lb.

13.995 kg 3.995 kg 13.995 ± 0.005 kg

30.0 lb. 10.0 lb. 30.0 ± 0.01 lb.

Remove

Weight Display Result

Note: Do NOT remove any weight from the Top Plate.

Over-Capacity Test

This test checks for the proper indication from the scale when too
much weight is placed on the top plate.

Note: This test must immediately follow the increasing load

test; do not remove any of the weights prior to running
this test.

Place additional weight on the center of the top plate as shown in
the following chart. Use the weight that corresponds to the 7875
weight feature. The display shows a series of dashes to indicate an
over-capacity condition.

Weigh t

Step

1 9.995 kg 0.04 kg --.---

Feature

13.995 kg 0.04 kg --.---

30.0 lb. 0.08 lb. --.---

Add

Weigh t

Remove

Weight Display Result

17

7875 Scanner / Scale

Step

2 9.995 kg 0.04 kg 9.995 ± 0.005 kg

Weig ht

Feature

13.995 kg 0.04 kg 13.995 ± 0.005 kg

30.0 lb. 0.08 lb. 30.0 ± 0.01 lb.

Add

Weig ht

Remove

Weight Display Result

Note: Do NOT remove any weight from the Top Plate.

Decreasing Load Test

This test checks the scale’s accuracy when incrementally removing
weight from the top plate. Use weights that correspond to the 7875
weight feature.

Note: This test must immediately follow the over-capacity test;

do not remove any of the weights prior to running this
test.

Step

1 9.995 kg 2.495 kg 7.5 ± 0.005 kg

2 9.995 kg 5.0 kg 2.5 ± 0.00 kg

3 9.995 kg 0.1 kg 2.5 kg 0.1 ± 0.00 kg

4 9.995 kg 0.1 kg 0.0 ± 0.00 kg

Weig ht
Feature Add Weight

13.995 kg 3.995 kg 10.0 ± 0.005 kg

30.0 lb. 10.0 lb. 20.0 ± 0.01 lb.

13.995 kg 7.5 kg 2.5 ± 0.00 kg

30.0 lb. 15.0 lb. 5.0 ± 0.00 lb.

13.995 kg 0.1 kg 2.5 kg 0.1 ± 0.00 kg

30.0 lb. 0.2 lb. 5.0 lb. 0.2 ± 0.00 lb.

13.995 kg 0.1 kg 0.0 ± 0.00 kg

30.0 lb. 0.2 lb. 0.0 ± 0.00 lb.

Remove

Weight Display Result

18

Quick Reference

Shift Test

This test involves moving a weight off the center point of the top
plate to check for continued accuracy.

1. Place 5.00 kg (15.00 lb.) of weight in position 1 on the Top
Plate.

2. Move the weight to position 2 on the Top Plate. The display
should show 5.00 ± 0.005 kg (15.00 ± 0.01 lb.).

3. Repeat step 2 for positions 3, 4, and 5.

4. Move the weight to position 1 again.

5. Remove all weights. The display should read 0.000 ± 0.000kg
(0.00 ± 0.00 lb.).

6. Raise and hold up the Top Plate. Record the Cal and PAr val­ues shown on the display.

5

2

1

34

19

7875 Scanner / Scale

Secure the Calibration Switch

When you perform a scale calibration, seal the Calibration Switch
cover with a lead/wire seal using a lead/wire seal press or a film/
paper seal (obtained locally). The type of seal you use depends on
your local laws; also, Weights and Measures officials may be
required to attach the seal.

Note: In the United States and Canada, the audit trail can serve

as an acceptable security seal.

Check the Scanner Operation

Make any necessary programming changes to the 7875, then scan
some bar codes to assure the scanner is working properly. The 7875
does not have an On/Off switch. Use the circuit breaker switch in
the checkstand to turn the unit on or off.

Setting the Program Parameters

Caution: Some host terminals can corrupt the 7875 program if

they are running and are connected to the 7875 while
you are making program changes. Either turn off the
host terminal or disconnect the interface cable before
scanning any programming tags.

To make changes to the program parameters, enter information
from the Programming Worksheets on page 29. The Programming
Worksheets identify all the available program parameters. Each
worksheet relates to a specific programming mode. Most
programming options have defaults, identified by a heavy box, that
are determined at the factory. Scanning the
tag after applying power to the unit sets the parameters to these
values.

20

Default

tag as the first

Quick Reference

Change the 7875 program by scanning the proper sequence of
programming tags included with the unit. To make program
changes:

1. Enter the Base Programming state by scanning the

ming Mode

ing power.

2. Select a Programming Worksheet and enter its parameter data
by scanning the appropriate Hex tags.

3. Save the program by scanning the

Note: In most cases the factory-determined defaults are the

tag; this must be the first tag scanned after apply-

Save and Reset

correct parameter setting. However, if you do need to
make changes, first set all parameters to default values,
then make any necessary changes to the appropriate pa­rameters.

Program-

tag.

Scan Sample Tags

Scan some sample tags to verify that the 7875 is communicating
with the host terminal. Following are four tags that you can use,
providing the programming options are enabled.

21

7875 Scanner / Scale

UPC-A

77062 37920

1

4

Code 39

17706237920

Code 128

17706237920

017706237920

Interleaved 2 of 5

22

Quick Reference

Operating the Scanner

The 7875 is a fixed-position device installed in a checkout counter,
and is not moved by the operator during operation. The 7875 is
maintained and serviced by trained service personnel only. The
operator has no access to any laser module components.

The7875 does not have a power switch. Turn it on and off using
the circuit breaker switch, located in the checkstand, that supplies
power to the unit. Be sure this switch is in the On position.

The Status Indicator on the Operator Display Panel is red when the
7875 is ready. To scan, slide an item from the checkstand across the
scanner, and back onto the checkstand. With a good scan, the Status
Indicator flashes green, then turns red. Nothing happens if the bar
code is not read.

Status Indicator

23

7875 Scanner / Scale

Operating the Scale

The 7875 typically takes from 1.0 to 2.0 seconds to weigh an item,
depending on the item’s weight. Heavier items take longer. Before
weighing an item, make sure the scale displays all zeros. If not, press
the Scale Zero Button.

Note: Place the item you are weighing in the center of the Top

Plate. The item must fit completely on the Top Plate, and
not hang over onto the checkstand.

When the scale weighs an item, the Status Indicator flashes green
and a good weigh tone sounds. Nothing happens if the scale cannot
weigh an item.

Status Indicator

Integrated Display

Scale Zero Button

Top Plate

24

Quick Reference

Cleaning

Keep the scan windows clean to keep the read rate exceptionally
high. During normal operation the scan windows can accumulate
dirt, which degrades performance to the point where the scanner
cannot read bar codes. The Please Clean Window indicator flashes
when the scan windows need cleaning. Use a soft cloth moistened
with a common, non-abrasive, liquid window cleaner to clean the
scan windows. Be sure to spray the cleaner onto the cloth, not
directly onto the 7875.

Note: Scale problems can occur from debris collecting under

the Top Plate. Be sure to keep the plastic subplate clean
to prevent interference with the Top Plate when weigh­ing items.

Top Plate

Wiping Action

25

Plastic Subplate

7875 Scanner / Scale

Correcting Scanner Problems

Problem

Scanner does
not operate

Scanner does
not operate

Scanner does
not operate

Scanner does
not read tags

Scanner reads
only two tags

Status

Indicator Tone

Red Off
Green Off

Red Flash­ing Green
Flashing

Red Flash­ing

Red Flash­ing

Red On Off 7875 is

Off No power

Off Sleep

Off Communi-

Off Internal

Possible

Cause Corrective Action

to the unit

mode

cations is
IBM 468x
and scan­ner is off­line

failure

not com­municat­ing with
host termi­nal

Check electrical outlet for
proper power.

Verify the circuit breaker
switch is in the ON posi­tion.

Pass something in front of
the motion detector.

Verify that the IBM termi­nal is turned on.

Verify that the IBM termi­nal is recognizing the

7875.
Verify that the Interface

Cable is properly connect­ed.

Remove power from the
7875 and then supply
power again. If the prob­lem is not corrected, have
scanner repaired.

Verify that the Interface
Cable is properly connect­ed.
Remove power from the
7875 and then supply
power again. If the prob­lem is not corrected, have
scanner or host terminal
repaired.

26

Quick Reference

Correcting Scale Problems

Problem Possible Cause Corrective Action

Error code 5---­displays

Error code 4---­displays

Error code 4---­displays

Scale display is
blank

Scale drift Verify that nothing is on the scale.

Possible scale error Press Scale Zero button and retry. If

Slight vibration to
scale when calibrat­ing

Top Plate is being
prevented from
moving down.

Lift the Top Plate and verify that no
objects are under it. Push Scale
Zero button. If error code persists,
have unit repaired.

error code persists, have unit re­paired.

Calibrate scale, not permitting any
external scale movement while the
weights are on the scale.

Remove interference around edge
of Top Plate and checkstand.

Remove any foreign objects from
under the Top Plate.

27

7875 Scanner / Scale

Determining the Communication Protocol

Use the following procedure to determine the communications
protocol programmed in your 7875.

1. Apply power to the 7875.

2. Scan the
scanned after applying power. Scan the
read tone for this tag sounds (three beeps).

If the 7875 has the Voice feature enabled, the communications
protocol is given audibly. If the Voice feature is not enabled,
the Status indicator flashes green and the 7875 beeps, identi­fying the communication protocol. Following are the number
of beeps that sound for each communication protocol.

1 Short, high-pitched beep OCIA NCR Short
1 Beep OCIA NCR Long
2 Beeps OCIA Non-NCR
3 Beeps IBM 468x
6 Beeps RS-232
7 Beeps OCIA Single-Cable
8 Beeps OCIA Dual-Cable

Diagnostic Mode

tag; this must be the first tag

Hex 3

Beeper Indications

Beep Sequence Indication

tag. The good

3. Remove power from the 7875.

28

Quick Reference

Programming Worksheets

This section describes the options used to program your scanner/
scale using the bar codes in the
and letters in boxes represent Hex bar codes to scan when selecting
each option.

10

COMMUNICATIONS PROTOCOL

Protocol

0 1 2 3 4 5

OCIA

NCR Short

(Datachecker)

OCIA

NCR Long

Programming Tags Guide

OCIA

Non NCR

(Casio

4-Bit Parallel)

IBM 468x

Port 4A

(Slot Scanner)

IBM 468x

(HHBCR)

Port 4B

. Numbers

RS-232

6 7 A B C

OCIA

Single Cable

11

GOOD READ TONE

Tone On/Off

A

Tone Frequency

B

(Hertz)

Tone Length

C

(Milliseconds)

Tone Volume

D

Not-On-File

E

Tone Volume

IBM 1520

OCIA NCR
Dual Cable

0 1

Off On

B

C

D

E

OCIA

Non NCR

Dual Cable

When entering Tone Frequency, the adjustment can be
incremented upward by scanning the
time you scan the
increases one unit. Scan the
to end this mode.

When entering Tone Length, the adjustment can be
incremented upward by scanning the
time you scan the
one unit. Scan the
this mode.

When entering Tone Volume, the adjustment can be
incremented upward by scanning the
time you scan the
one unit. Scan the
this mode.

When entering Not-On-File Tone Volume, the adjustment
can be incremented upward by scanning the
Each time you scan the
increases one unit. Scan the
to end this mode.

(BCR)

4-Bit Parallel

Hex B tag, the tone frequency

Hex C tag, the tone length increases

End tag or a valid Hex tag to end

Hex D tag, the tone Volume increases

End tag or a valid Hex tag to end

Hex E tag, the tone Volume

Hex B tag. Each

End tag or a valid Hex tag

Hex C tag. Each

Hex D tag. Each

End tag or a valid Hex tag

29

TEC

Hex E tag.

7875 Scanner / Scale

12

TIMERS

Lockout Time

A

(Milliseconds)

Restart

B

Lockout Timer

Active Time

C

(Minutes)

13

UPC/EAN

A

Version D

B

Extend UPC-A

C

To EAN-13

UPC/EAN

0 1 2 3 4 6 75

450 600 750 900 1050 1200 1350 1500

0 1

Off On

0 1 2 3

0153060

No Time-out ( Always Active)

Note: We recommend that you do not set the Active Time

parameter to 0. Leaving the laser light on all the time reduces
its life expectancy.

0 1

Disable Enable

0 1

None D-1

0 1

Disable Enable

2 3

D-2 D-3

4 5

D-4 D-5

Extend UPC-E

D

To UPC-A

Periodical Codes

E

Periodical Code
Extension

Send Data

0 1

Disable Enable

0 1

Disable Enable

0 1

2-Digit

5-Digit

Only

Only

0 1

Data As

Decoded

2

2-Digit &

5-Digit

Periodical Code

Data Only

30

2

2CF Hex

If Periodical Data

Not Decoded

Quick Reference

1 4

CODE 39

Code 39

A

0 1

Disable Enable

Minimum Characters Allowed

B

Full ASCII

C

Check Digit Present

D

Transmit Check Digit

E

Allow One-Character Tags

F

1 5

INTERLEAVED 2 OF 5

Interleaved 2 of 5

A

Bar Code Length

B

Value 1 Characters

Value 2 Characters

Check Digit Present

C

0 1

Disable Enable

0 1

Range

Specific

Check

Check

0 1

Disable Enable

2 - F 4

0 1

Disable

Enable

0 1

Disable Enable

0

Disable Enable

0 1

Disable Enable

Minimum

Minimum

Default

1

0 - 5 0 - 9

Character 1 Character 2

Default

0 8

0 - 5 0 - 9

Character 1 Character 2

Default

1 6

Transmit Check Digit

D

0 1

Disable Enable

31

7875 Scanner / Scale

1 7

CODE 128

Code 128

A

Minimum Data Characters Allowed

B

UCC 128

C

1 6

LABEL IDENTIFIERS

Identifier Type

A

Default Prefix

0

0 1

Disable Enable

1 2 3 4 5

0 1

Disable Enable

2

None

3

Unique Prefix

Common Byte 1

B

Common Byte 2

C

Bar Code Type

D

Common Byte

Unique Identifier

Version Number
(UPC-D Only)

0 - 7

Hex Character

0 - 7

Hex Character

0 1 2 3 4

UPC-A UPC-D UPC-E EAN-8 EAN-13

5 6 7

Code 39 Code 128 Interleaved

0 1 2 3

None Common Byte 1 Common Byte 2 Both Common Bytes

0 - 7

Hex Character

0

Do Not Include

0 - F

Hex Character

0 - F

Hex Character

2 of 5

0 - F

Hex Character

1

Include

Default

5 D

Default

4 2

Default: Varies according to
Bar Code Type.

32

Quick Reference

2 0

RS-232 PARAMETERS - SET 1

Baud Rate

A

Parity

B

Stop Bits And

C

Character
Length

Handshake

D

2 1

RS-232 PARAMETERS - SET 2

BCC Options

A

Interface Control

B

Check Digit

C

0

300160021200324004480059600619200

0

Odd1Even4None

0

1 Stop Bit

7-Bit Character

0

RTS Low

CTS Ignored

3 4 5

Raise RTS

Ignore CTS

0

Disable1Enable

0

None1ACK/NAK2XOn/XOff3ACK/NAK & XOn/XOff

Disable UPC-A
Disable EAN-8
Disable EAN-13
Disable UPC-E

Note: Check Digit parameter also applies to UPC-E

8-Bit Character

RTS High

CTS Ignored

RTS Low

Wait for CTS

0

when using for OCIA communications.

Note: Parity must be Odd or Even on a

1

1 Stop Bit

1

Raise RTS

Wait for CTS

RTS High

Wait for CTS

Default: 7870/7875-1000 - Disable

7870/7875-2000 - Enable

1

Enable UPC-A
Enable EAN-8
Enable EAN-13
Disable UPC-E

7870/7875;

None is selected.

7-Bit Character

Odd is used if

2

2 Stop Bits

2

2

Disable UPC-A
Disable EAN-8
Disable EAN-13
Enable UPC-E

3

2 Stop Bits

8-Bit Character

3

Enable UPC-A
Enable EAN-8
Enable EAN-13
Enable UPC-E

33

7875 Scanner / Scale

2 2

RS-232 PREFIX BYTE

Prefix Byte

A

0

Disable1Enable24 Comma Prefix On34 Comma Prefix Off

ASCII Code

B

2 3

RS-232 TERMINATOR BYTE

Terminator Byte

A

ASCII Code

B

2 4

RS-232 COMMUNICATIONS OPTIONS

Message Delay

Scanner or
Scanner/Scale Format

Normal or
Eavesdrop Mode

0 - 7

Hex Character

(ASCII Code Chart)

0

Disable1Enable

0 - 7

Hex Character

(ASCII Code Chart)

Scanner Only5Scanner/Scale

Normal Mode7Eavesdrop Mode

0 - F

Hex Character

(ASCII Code Chart)

Note: A Terminator Byte is required on a

7870/7875. If you select

Disable , it is ignored and an

ETX (03) is sent.

0 - F

Hex Character

(ASCII Code Chart)

0

No Delay110ms Delay250ms Delay

4

6

0 2

0 3

Default

Default

34

Quick Reference

3 0

SCALE PARAMETERS

Model Number

IBM Address

Speak Display Price

3 2

MISCELLANEOUS PARAMETERS

5-Second Weight Display Timer

IBM Tone Control
(Good Read Tone Control)

OCIA Price Display

IBM Rexmit Control

OCIA Blank Display in Price Mode

Enable/Disable Voice Messages

IBM Tag Data Format

3

Scanner/Scale4Scanner Only

5

Address 6A6Address 6B7Address 6E

B

Toggle On and Off

1

Disable2Enable

3

Disable4Enable

5

Disable6Enable

7

3 Times8Forever

9

DisableAEnable

Default: Enabled

D

Toggle

E

HexFASCII

35

7875 Scanner / Scale

3 6

Dual Cable Interface Options

Scale Type

A

0

No Adapter -

Exit Parameter

1

Avery2Weightronix3Tec

Parallel

4

Casio

Parallel

5

Datachecker6Toledo

ASCII Code Chart

ASCII Code Chart

30

NULL
SOH
STX
ETX
EOT
ENQ
ACK
BEL
BS
HT
LF
VT
FF
CR
S0
S1

10
11
12
13
14
15
16
17
18
19
1A
1B
1C
1D
1E
1F

00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F

DLE
DC1
DC2
DC3
DC4
NAK
SYN
ETB
CAN
EM
SUB
ESC
FS
GS
RS
US

20
21
22
23
24
25
26
27
28
29
2A
2B
2C
2D
2E
2F

0

SP

31

1

!

32

2

"

33

3

#

34

4

$

35

5

%

36

6

&

37

7

'

38

8

(

39

)

9

3A

*

:

3B

;

+

3C

,

<

3D

-

=

3E

.

>

3F

/

?

50

40
41
42
43
44
45
46
47
48
49
4A
4B
4C
4D
4E
4F

P

@

51

Q

A

52

R

B

53

S

C

54

T

D

55

U

E

56

V

F

57

W

G

58

X

H

59

Y

I

5A

Z

J

5B

[

K

5C

\

L

5D

]

M

5E

^

N

5F

_

O

70

60
61
62
63
64
65
66
67
68
69
6A
6B
6C
6D
6E
6F

p

71

q

a

72

r

b

73

s

c

74

t

d

75

u

e

76

v

f

77

w

g

78

x

h

79

y

i

7A

z

j

7B

{

k

7C

|

l

7D

}

m

7E

n

7F

DEL

o

36

Quick Reference

Regulatory Information

Radio Frequency Interference Requirements

This device has been tested and found to comply with the limits for a Class A digital
device pursuant to Part 15 of the Federal Communications Commissions Rules and
Regulation. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instruction manual, may cause harmful interference to
radio communications. Operation of this equipment in a residential area is likely to
cause harmful interference in which case the user will be required to correct the
interference at his own expense.

However, there is no guarantee that interference will not occur in a particular
installation. If the equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following measures:

• Re-orient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that which the
receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

Radio Frequency Interference Requirements - Canada

This Class B digital apparatus complies with Industry Canada Standard ICES-003.
Cet appareil numérique de la classe B est conform à la norme NMB-003 d’Industrie

Canada.

Voluntary Control Council for Interference (VCCI) Radio Frequency Interference Statement

Scale Regulatory

Country, state, and local regulatory agency notification of an installation of a weighing
instrument or Point of Service terminal’s device is required. Failure to comply with
government Weights and Measures regulations can result in criminal prosecution of
individuals and can jeopardize the ability to conduct normal business. The 7875
Scanner/Scale has been certified in many countries. Contact the NCR office of Weights
& Measures and Laser Safety for specific country approvals.

37

7875 Scanner / Scale

CE Marking and European Union Compliance

Products intended for sale within the European Union are marked with the
CE Mark which indicates compliance to applicable Directives and
European Normes (EN), as follows. Amendments to these Directives or
ENs are included:

Applicable Directives

• Electromagnetic Compatibility Directive 89/336/EEC

• Low Voltage Directive 73/23/EEC

Applicable Standards

• EN 55 022 - Limits and Methods of Measurement of Radio Interference Charac­teristics of Information technology Equipment

Warning:

product may cause radio interference in which case the user may be
required to take adequate measures.

• EN 50 082-1:1997 - Electromagnetic Compatibility - Generic Immunity Stan­dard, Part 1: Residential, commercial, Light Industry

• IEC 1000-4-2(1995-01) - Electromagnetic compatibility (EMC) - Part 4:Testing
and measurement techniques - Section 2: Electrostatic discharge immunity test.

• IEC 1000-4-3(1995-03) - Electromagnetic compatibility (EMC) - Part 4:Testing
and measurement techniques - Section 3: Radiated, radio-frequency, electromag­netic field immunity test.

• EN 60 950 + Amd 1 + Amd 2 - Safety of Information Technology Equipment
Including Electrical Business Equipment

• EN 60 825-1 (EN 60 825) - Safety of Devices Containing Lasers

This is a Class A product. In a domestic environment this

Laser Devices

Symbol products using lasers comply with US 21CFR1040.10, Subchapter J and
IEC825/EN 60 825 (or IEC825-1/EN 60 825-1, depending on the date of
manufacture). The laser classification is marked on one of the labels on the product.

Class 1 Laser devices are not considered to be hazardous when used for their intended
purpose. The following statement is required to comply with US and international
regulations:

Caution: Use of controls, adjustments or performance of procedures other than those
specified herein may result in hazardous laser light exposure.

Class 2 laser scanners use a low power, visible light diode. As with any very bright light
source, such as the sun, the user should avoid staring directly into the light beam.
Momentary exposure to a Class 2 laser is not known to be harmful.

38

Quick Reference

Scanner Labeling

This laser module
does not comply
with 21CFR1040.
Use only as a
component.

Class IIa Laser Product. Avoid Long-term Viewing of direct Laser Light.

Appareil à Laser de classe IIa Eviter Toute Exposition
Prolongèe de la vue à la lumiè re laser directe.

Class IIa Producto Laser. Tratè De no ver directamente èl Rayo
Laser por mucho tiempò. (IEC CLASS 1 LASER PRODUCT)

C

39

7875 Scanner / Scale

In accordance with Clause 5, IEC 0825 and EN60825, the following information is
provided to the user:

ENGLISH HEBREW

CLASS 1 CLASS 1 LASER PRODUCT
CLASS 2 LASER LIGHT

DO NOT STARE INTO BEAM
CLASS 2 LASER PRODUCT

DANISH

KLASSE 1 KLASSE 1 LASERPRODUKT
KLASSE 2 LASERLYF CLASSE 1 PRODOTTO AL LASER DI CLAS SE 1

SE IKKE IND I STRÅLEN CLASSE 2 LUCE LASER
KLASSE 2 LASERPRODUKT NON FISSARE IL RAGGIOPRODOTTO

AL LASER DI CLASSE 2

DUTCH

KLASSE 1 KLASSE-1 LASERPRODUKT
KLASSE 2 LASERLICHT KLASSE 1 LASERPRODUKT, KLASSE 1

NIET IN STRAAL STAREN KLASSE 2 LASERLYS IKKE STIRR INN I LYSSTRÅLEN
KLASSE-2 LASERPRODUKT LASERPRODUKT, KLASSE 2

FINNISH PORTUGUESE

LUOKKA 1 LUOKKA 1 LASERTUOTE CLASSE 1 PRODUTO LASER DA CLASSE 1
LUOKKA 2 LASERVALO

ÄLÄ TUIJOTA SÄDETTÄ CLASSE 2 LUZ DE LASER NÃO FIXAR O RAIO LUMINOSO
LUOKKA 2 LASERTUOTE PRODUTO LASER DA CLASSE 2

FRENCH SPANISH

CLASSE 1 PRODUIT LASER DE CLASSE 1 CLASE 1 PRODUCTO LASER DE LA CLASE 1
CLASSE 2 LUMIERE LASER CLASE 2 LUZ LASER

NE PAS REGARDER LE RAYON FIXEMENT NO MIRE FIJAMENTE EL HAZ
PRODUIT LASER DE CLASSE 2 PRODUCTO LASER DE LA CLASE 2

GERMAN SWEDISH

KLASSE 1 LASERPRODUKT DER KLASSE 1 KLASS 1 LASERPRODUKT KLASS 1
KLASSE 2 LASERSTRAHLEN KL ASS 2 LASERLJUS STIRRA INTE MOT STRÅLEN

NICHT DIREKT IN DEN LASERSTRAHL SCHAUEN LASERPRODUKT KLASS 2
LASERPRODUKT DER KLASSE 2

ITALIAN

NORWEGIAN

40

Quick Reference

Service Information

Before you use your unit, it must be configured to operate in your facility’s network and
run your applications.

If you have a problem with running your unit or using your equipment, contact your
facility’s Technical or Systems Support. If there is a problem with the equipment, they
will contact the Symbol Support Center:

United States 1-800-653-5350 Canada 905-629-7226
United Kingdom 0800 328 2424 Asia/Pacific 337-6588
Australia 1-800-672-906 Austria 1-505-5794
Denmark 7020-1718 Finland 9 5407 580
France 01-40-96-52-21 Germany 6074-49020
Italy 2-484441 Mexico 5-520-1835
Netherlands 315-271700 Norway 66810600
South Africa 11-4405668 Spain 9-1-320-39-09
Sweden 84452900
Latin America Sales Support 1-800-347-0178 Inside US

Europe/Mid-East Distributor Operations Contact local distributor or call

[phone] Outside US

[phone]

Warranty

Symbol Technologies, Inc. (“Symbol”) manufactures its hardware products in
accordance with industry-standard practices. Symbol warrants that for a period of
twelve (12) months from date of shipment, products will be free from defects in
materials and workmanship.

This warranty is provided to the origin al owner only and is not transferable to any third
party. It shall not apply to any product (i) which has been repaired or altered unless
done or approved by Symbol, (ii) which has not been maintained in accordance with
any operating or handling instructions supplied by Symbol, (iii) which has been
subjected to unusual physical or electrical stress, misuse, abuse, power shortage,
negligence or accident or (iv) which has been used other than in accordance with the
product operating and handling instructions. Preventive maintenance is the
responsibility of customer and is not covered under this warranty.

Wear items and accessories having a Symbol serial number, will carry a 90-day limited
warranty. Non-serialized items will carry a 30-day limited warranty.

41

Warranty Coverage and Procedure

During the warranty period, Symbol will repair or replace defective products returned
to Symbol Technologies. For warranty service in North America, call the Symbol
Support Center at 1-800-653-5350. International customers should contact the local
Symbol office or support center. If warranty service is required, Symbol will issue a
Return Material Authorization Number. Products must be shipped in the original or
comparable packaging, shipping and insurance charges prepaid. Symbol will ship the
repaired or replacement product freight and insurance prepaid in North America.
Shipments from the US to other locations will be made F.O.B. Symbol’s manufacturing
plant. Shipments from Symbol’s repair facilities outside the US will be made F.O.B.
Symbol’s repair facility.

Symbol will use new or refurbished parts at its discretion and will own all parts
removed from repaired products. Customer will pay for the replacement product in
case it does not return the replaced product to Symbol within 3 days of receipt of the
replacement product. The process for return and customer’s charges will be in
accordance with Symbol’s Exchange Policy in effect at the time of the exchange.

Customer accepts full responsibility for its software and data including the appropriate
backup thereof.

Repair or replacement of a product during warranty will not extend the original
warranty term.

Symbol’s Customer Service organization offers an array of service plans, such as on­site, depot, or phone support, that can be implemented to meet customer’s special
operational requirements and are available at a substantial discount during warranty
period.

General

Except for the warranties stated above, Symbol disclaims all warranties, express or
implied, on products furnished hereunder, including without limitation implied
warranties of merchantability and fitness for a particular purpose. The stated express
warranties are in lieu of all obligations or liabilities on part of Symbol for damages,
including without limitation, special, indirect, or consequential damages arising out of
or in connection with the use or performance of the product.

Seller’s liability for damages to buyer or others resulting from the use of any product,
shall in no way exceed the purchase price of said product, except in instances of injury
to persons or property.

Some states (or jurisdictions) do not allow the exclusion or limitation of incidental or
consequential damages, so the proceeding exclusion or limitation may not apply to you.

70-37658-01

Revision A — April 1999

Symbol Technologies, Inc. One Symbol Plaza Holtsville, NY 11742-1300