Salter Brecknell 7815, 7815R User Manual

Model 7815

Parcel Bench Scale

User’s Manual

Risk of electrical shock. Do not remove cover.

No user serviceable parts inside. Refer servicing to

Weigh-Tronix reserves the right to change

09/09/05 7815_U.P65 PN 7424-16728E

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Model 7815 Parcel Bench Scale User’s Manual

CAUTION

qualified service personnel.

specifications at any time.

Table of Contents

Description -------------------------------------------------- 4

Specifications ----------------------------------------------- 4

Initial Setup -------------------------------------------------- 7

Operation ---------------------------------------------------- 8

Entering Setup Mode ------------------------------------- 9

Diagnostics Mode ----------------------------------------- 9

Configuration Mode --------------------------------------12

Calibration Mode ------------------------------------------ 14

Re-Calibration Mode ------------------------------------- 16

Review/Test Scale Settings---------------------------- 17

Error Codes ------------------------------------------------ 18

Communication ------------------------------------------- 18

Troubleshooting ------------------------------------------- 20

Spare Parts Listing --------------------------------------- 22

Model 7815 Parcel Bench Scale User’s Manual

3

Description

Specifications

The NCI Model 7815 is a digital electronic parcel
bench scale specifically designed for shipping
applications and is “Legal-for-Trade.”

The NCI Model 7815 has a standard RS-232
serial interface that enables it to be easily con­nected to a computer or other data-processing
device.

Capacity/Resolution

Agency Approvals

Dimensions

Power Supply

Frequency

Power Requirements

Operating Temperature

Model Capacity (lb) Capacity (kg) n(max)

7815-75 150 x 0.1 lb 75 x 0.05 kg 1500, 1500

7815-75 150 x 0.05 lb 75 x 0.02 kg 3000, 3750

(1) FACTORY SET (TYPE A PPROVED) (2) SELECTABLE (NOT TYPE A PPROVED)

United States: NTEP #00-096. For use as a
Class III Device from +5º to +40ºC.

If unit is to be used as a commercial device, all
local reporting and registration requirements
must be followed.

14"L x 12.5"W x 4.2"H

UL/CSA approved. In-line power supply with 6’
cord.

INPUT: 120 VAC + 10%-15%, Standard 3 wire w/
ground

OUTPUT: 15VDC @ .3 Amps DC

60 Hz Standard

0.1 amp maximum

42° to 104°F (+5º to +40ºC)

(1)

(2)

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Model 7815 Parcel Bench Scale User’s Manual

Construction

Die cast aluminum base with an ABS plastic
weight platter. Built-in overload protection.
Adjustable center stop, fixed corner stops.

Display

Scale Leveling

Zero Window

Under Capacity Limits

Over Capacity Limits

Sealing

1/2” high, six-digit LCD
Key panel with ZERO and TEST keys.
Optional remote display with 7 ft. cable.

A level bubble is mounted on the load bridge.
Leveling is accomplished by adjusting the four
feet on the bottom of the scale.

Initial automatic zero setting is ±10% of maxi­mum capacity—active at power on. Manual zero
setting range is ±2% of maximum capacity—
active using the ZERO key.

Under capacity indication will be given with
dashes appearing on the bottom line of the
display whenever the display is below zero.

Over capacity indication will be given with dashes
appearing on the top line of the display whenever
the weighed item exceeds 9 divisions over the
rated capacity of the unit. The scale will use the
initial zero value for reference for over capacity
determination.

Access to the calibration switch can be secured
with a lead-wire or pressure sensitive security
seal. The remote and primary indicators have no
metrological features that require the use of a
security seal.

Internal Counts

Model 7815 Parcel Bench Scale User’s Manual

The scale has 65,000 internal counts.

5

Dynamic Response The time from when weight is applied to the scale

to the time when stable weight is displayed:

0-1000d, 1.5 seconds

maximum mean average

1000d+, 2 seconds

maximum mean average

Communications

Factory default settings: 9600 baud, 7 data bits,
even parity, 1 stop bit.

Standard 9-pin pass through RS-232 interface
cable included. Not a null modem.

RS-232 bidirectional, configurable 1200 to 19.K
baud. Transmits weight and scale status when­ever ASCII “W”<CR> is sent by a remote device

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Model 7815 Parcel Bench Scale User’s Manual

Initial Setup

Unpacking the Scale

Installing the Scale

Check container for any obvious evidence of
damage. Inspect the unit for shipping damage.
Immediately report any damage to the shipper.

1. Mount the unit on a stable, level surface that
is free from air currents and vibration. Be
sure the weigh platter does not touch any
adjacent surfaces.

2. To install the weigh platter flush with a
countertop, use the dimensions below to
guide your construction.

7815 Platform Minimum Cutout

Dimensions Dimensions

14" W 14.75" W

12.5" D 13.25" D

4.2" Min. Ht.

3. Loosen the collars on the leveling feet. Level
the unit by using the level bubble under the
platter as a guide. Be sure all four feet are in
firm contact with the counter, then tighten all
collars.

4. Make sure all power cords, remote display
cables, etc. are not touching the live weighing
surface.

5. Plug the unit into an appropriate voltage
outlet, properly grounded.

Model 7815 Parcel Bench Scale User’s Manual

7

Operation

Operating Instructions

NCI Model 7815

Resident Display

Remote Displays

After the NCI Model 7815 is properly installed
and power is applied, the display will perform a
countdown test to insure all display segments are
functional.

After this test is completed, the display should
show zero (0.0).

If the display indicates a slightly “off” zero condi­tion (either a number in the display or dashes at
the bottom of the display), press the ZERO key.
When the display shows 0.0, it is ready to weigh.

Place item or parcel on the weigh platter and the
weight will be displayed. This information can be
transmitted when requested by the computer.

Model 7815 scales can have an optional remote
display (shown above). The remote display has a
keyboard and can be used in place of the resi­dent display. To activate the remote display,
power down the scale, plug the remote display
cable end into the marked socket on the back of
the unit. Reapply power and weight data will
appear on both the resident and remote displays.
The control keys (i.e., ZERO and TEST) are
active on both displays in the Model 7815.

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Model 7815 Parcel Bench Scale User’s Manual

Entering Setup Mode

Accessing the
Menu Mode

Switch Diagram

You can access the MENU Mode by pressing
switch 1 shown in Figure 1.

Figure 1

In the Menu Mode, there are four modes avail­able. They are as follows:

Diagnostic Mode (DIAG) – Used to test areas of
the scale’s function.

Configuration Mode (CONF) – Used to config­ure the scale for your application.

Calibration Mode (CAL) – Used when calibrat­ing the scale.

Recalibration Mode (RE-CAL) – Used to
change resolution and rounding-type.

The structure for these menus is shown in Figure

2. Following that are the step-by-step instructions

for accessing the items within each menu.

Diagnostics Mode

Diagnostic DIAG Mode

Model 7815 Parcel Bench Scale User’s Manual

The diagnostic (DIAG) mode menu lets you test
specific areas of the unit’s function. These areas
are:

Display (DISP) – Shows the version and revision
of the software, followed by a display segment
test.

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Figure 2

Menu Structure

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Model 7815 Parcel Bench Scale User’s Manual

Input/Output (I-O) – To test the data I/O port,
install a loopback connector and press the test
button. The message PASS or FAIL is displayed.
This test requires a jumper (short) between
transmit and receive data lines.

Internal Counts (A/D) – Displays A/D data
internal counts (factory use only).

Step-by-Step Instructions
for Diag Mode

Return to normal
operating mode by
pressing the SW-1
switch.

Press the ZERO key
to scroll through the
lists of selections.

Press the TEST Key to
make a selection.

If you want to skip a
test, press the ZERO
key to scroll to the
next test.

If you press the ZERO
key to advance the
display message to
DONE, you can press
TEST to return to the
DIAG menu.

If you encounter any
failure in these tests,
contact your local
Weigh-Tronix dealer.

Follow these steps to access the tests in the
DIAG menu. Refer to Figure 2.

1. Press SW-1…

Display shows DIAG.

2. Press the TEST key. . .

DISP is displayed.

3. Press the TEST key to perform the display
test described earlier…

Display test is performed and shows
DISP after the test is completed.

4. Press the ZERO key to scroll to the I/O test...

I-O is displayed. This stands for the
Input/Output test.

5. With a loopback connector in place, press
the TEST key to perform the I/O test . . .

PASS or FAIL is displayed. If the test
fails, the unit may have a serial interface
failure.

6. Press the ZERO key to scroll to the internal
count test . . .

A/D is displayed. Tests A/D count data.

Model 7815 Parcel Bench Scale User’s Manual

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7. Press the TEST key to perform this test…

8. Press the TEST key to stop the test . . .

Configuration Mode

The configuration (CONF) mode menu lets you
configure the scale to your specific application.
The items you can configure are as follows:

FILT (FILTER) – Adjusts the scale’s response to
fit environment. Factory default setting is FAST.

BAUD (BAUD) – Allows selection of appropriate
baud rate and parity for computer interface.
Factory default setting is 96-E.

Indicates internal A/D raw count. When
weight is applied, the count value should
increase proportionately.

The remaining selections are for viewing
current settings only. You can scroll
through the menu to verify the settings,
but to make changes, you must enter
configuration or calibration.

Step-by-Step Instructions
for CONF Mode

Return to normal
operating mode by
pressing the SW-1
switch.

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Model 7815 Parcel Bench Scale User’s Manual

1. Press SW-1. . .

DIAG is displayed.

2. Press the ZERO key. . .

CONF is displayed.

3. Press the TEST key. . .

FILT is displayed.

4. Press the TEST key. . .

The present filter setting is displayed.
The two choices are FAST and SLO.
When the proper selection

is displayed, press the TEST key and
FILT will again be displayed.

5. Press the ZERO key. . .

BAUD is displayed.

6. Press the TEST key. . .

The present baud rate and parity are
displayed.

7. Press the ZERO key to scroll through the
nine choices. When the proper selection is
displayed, press the TEST key and the
baud rate and parity will be set as se­lected…

FILT will again be displayed.

8. Press SW-1. . .

The unit returns to normal weighing mode.

Model 7815 Parcel Bench Scale User’s Manual

13

Calibration Mode

Calibration (CAL) Mode

Calibrating your
scale requires a
certified test weight
to ensure accurate
weighing.

Step-by-Step
Instructions for CAL
Mode

To abort the CAL
Mode at any time,
press the SW-1 switch.

The calibration (CAL) mode menu lets you
calibrate your scale. The items in the calibration
menu are as follows:

POUNDS/KILOGRAMS – Select the unit of
measure (lb or kg).

SCALE or CLASS – Select the scale rounding
factor as a SCALE or as a CLASS (Weight
Classifer) rounding device.

SCALE = .5 division rounding.

CLASS = .9 division rounding.

Factory default setting is CLASS.

CAPACITY – Select the capacity / resolution of
the scale (150.05 or 150.1).

Follow these steps to calibrate your scale. Refer
to Figure 2.

1. From the normal weighing mode, press SW­1…

DIAG is displayed.

2. Press the ZERO key until…

CAL is displayed.

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3. Press the TEST key to start calibration…

LB is displayed.

4. If you want to change the unit of measure,
press the ZERO key to toggle between LB
and KILO. When the choice you want is
displayed, press the TEST key…

The current capacity selection is dis­played (150.1).

Model 7815 Parcel Bench Scale User’s Manual

Make sure the weigh
platter and access
plate are on the scale
to establish proper
zero load.

Table 1

Alternative

Calibration Points

5. Press the ZERO key to scroll through the
available capacity selections. When the
choice you want is displayed, press the
TEST key.

6. If LB was selected, the unit will display
CLASS. Press the ZERO key to toggle
between SCALE and CLASS. When the
choice you want is displayed, press the
TEST key. . .

LOAD 0 is displayed.

7. Clear all weight from the weigh platter and
press the TEST key. After a brief wait…

LOAD 150 is displayed (or the current
capacity selected in Step 5). Alternate
calibration points can be chosen using
the ZERO key to scroll choices.

The NCI 7815 allows calibration using less
than full capacity weights. Below are the
alternative weights that can be used to
calibrate your scale for its designed capacity.

Alternative

Capacity Calibration Weights

150 lb 10 lb, 50 lb

75 kg 10 kg, 50 kg

The calibration
weight should be
removed from the
weigh platter before
countdown com­pletes.

Model 7815 Parcel Bench Scale User’s Manual

8. Place chosen calibration weight on the weigh
platter and press the TEST key…

After a brief wait, DONE is displayed.

9. Press SW-1…

The unit returns to normal weighing
mode.

The unit is now tested, configured and calibrated.
It is ready for use in your application.

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Re-Calibration Mode

The re-calibration (RE-CAL) mode menu lets you
change the scale resolution or rounding method
without using any calibration weights. If you want
to change the unit of measure operation, you
must perform a full calibration using test weights.

For a scale originally calibrated in the lb. mode,
you may also change rounding methods (i.e.,
scale or classifier).

Step-by-step Instructions
for RE-CAL Mode

Follow these steps to re-configure your scale
(without weights). Refer to Figure 2.

1. From the normal weighing mode, press SW­1…

DIAG is displayed.

2. Press the ZERO key until…

RE-CAL is displayed.

3. Press the TEST key…

150.1 is displayed. (Displays the current
capacity/resolution setting)

4. Press the ZERO key until desired capacity/
resolution is displayed.

5. Press the TEST key to select a new capacity/
resolution. If the scale is operating in LB
mode…

The unit will display CLASS.

6. Press the ZERO key to toggle between
SCALE and CLASS.

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7. When the choice you want is displayed,
press the TEST key…

DONE is displayed.

8. Press the TEST key or SW-1 to return to
normal weighing mode.

Model 7815 Parcel Bench Scale User’s Manual

Review/Test Scale Settings

If you press and
release the TEST key,
the display will show
the scales model
number, version­revision, and per­forms a display test.
To review the current
system settings,
press and hold the
TEST until the display
prompts DISP.

Press the ZERO key to
move to the next item
in the menu.

Press the TEST key to
select the displayed
item to run or view.

The TEST key located on the front panel lets you
perform some basic system diagnostics, as well
as review the current system settings without
having to access SW-1 switch inside the scale.

When finished running tests or viewing the
settings, press the ZERO key until DONE is
displayed. Then press the TEST key to return to
normal (i.e., weighing) mode of operation.

Model 7815 Parcel Bench Scale User’s Manual

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Error Codes

Communication

Any system errors detected by the scale will be
displayed as the letter E followed by a one-digit
error code. Press the TEST key to continue
operation. If a calibration error occurs, the only
way to clear the error is by recalibrating the unit.

The error codes are defined as follows:

Err-1 Calibration Error
Err-2 Configuration Error
Err-3 Initial Zero Error
Err-4 Zero Error

See the troubleshooting section at the end of this
manual.

The NCI 7815 comes factory configured as a
serial RS-232 interface device. There is one 9­pin DE type female connector accessible at the
rear of the unit. The functional pinout of this
cable provided with your scale is that of a stan­dard PC, which is as follows:

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DE-9 Female Scale DE-9 Male Host

Pin Name Direction Pin Name Direction

1. JMP1 - 1. DCD IN

2. TXD OUT 2. RXD IN

3. RXD IN 3. TXD OUT

4. JMP 1 - 4. DTR OUT

5. GND REF 5. GND -

6. JMP 1 - 6. DSR IN

7. JMP 2 - 7. RTS OUT

8. JMP 2 - 8. CTS IN

9. NC - 9. RI IN

NOTE: JMP1 PINS 1, 4 and 6, and JMP 2 Pins 7
and 8 are internally jumpered inside the scale.

Model 7815 Parcel Bench Scale User’s Manual

Communication Setting

Factory default settings: 9600 baud, 7 data bits,
even parity, 1 stop bit. Protocol is NCI standard
only.

Standard 9-pin pass through RS-232 interface
cable included. Not a null modem.

Symbol Key:

<ETX> End of Text Character (03 hex)
<LF> Line Feed Character (0A hex)
<CR> Carriage Return Character (0D hex)
<SP> Space (20 hex)
X Character from display including

minus sign
hh Two status bytes
uu Unit of measure (lb, kg) using ANSI

standard abbreviations)

Command Scale Response Results

W<CR> <LF>xxxx.xxuu<CR> Returns decimal

<LF>hh<CR><ETX> weight with units
or and scale status.
<LFxxxxxx<CR> Returns contents
<LF>hh<CR><ETX> of display (other

than wt) and scale
status

S<CR> <LF>hh<CR><ETX> Returns scale

Z<CR> <LF>hh<CR><ETX> Scale is zeroed,

All else <LF>?<CR><ETX> Unrecognized

Model 7815 Parcel Bench Scale User’s Manual

status

then status returns

command

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Troubleshooting

Symptom and
Recommended Action

Perform each step in sequence to correct the
error condition. If the problem cannot be cor­rected, contact your local Weigh-Tronix dealer.

No power (display is blank)

1. Check that the primary side of the cord is
plugged into the AC outlet, and the second­ary side is properly connected to the power
jack on the back of the scale.

2. Replace power supply.

3. Replace the display board.

4. Replace the main board.

Missing or extra segments on display

1. Replace display board.

2. Replace the main board.

Scale will not return to zero, or incorrect

weight is displayed

1. Press the ZERO key.

2. Check for interference of weighing platform.

3. Power down, then power up the scale.

4. Recalibrate the scale.

5. Replace the load cell.

6. Replace the main board.

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Display shows unrecognized characters

1. Check software PROM for proper insertion.

2. Check display cables for the proper connec­tion.

3. Replace PROM

4. Replace the display board.

5. Replace the main board.

Display shows under “_ _ _” dashes

(Indicates that the scale is below zero or under capacity.)

1. Verify that the weigh platter is on the scale.

2. Press the ZERO key.

3. Power down, remove any items from the
platter, and then power up the scale.

4. Recalibrate the scale.

5. Replace the load cell.

Model 7815 Parcel Bench Scale User’s Manual

6. Replace the main board.

Display shows center “

(Indicates the scale is outside zero capacity of ±2%.)

_ _ _

” dashes

1. Verify that the weigh platter is on the scale.

2. Press the ZERO key.

3. Power down, remove any items from the
platter, and then power up the scale.

4. Recalibrate the scale.

5. Replace the load cell.

6. Replace the main board.

_ _ _

Display shows upper “

” dashes

(Indicates the scale is over capacity.)

1. Remove all items from the scale.

2. Press the ZERO key.

3. Power down, then power up the scale.

4. Recalibrate the scale.

5. Replace the load cell.

6. Replace the main board.

Scale is not transmitting data to the host
device

1. Check cable connection at both the rear of
the scale and the host device.

2. Check communication setting and baud rate
on both scale and software.

3. Perform I/O loopback test.

4. Replace the cable.

6. Replace the main board.

The ZERO key and TEST key do not function

1. Open display enclosure and verify that the
keypad cable is still installed correctly.

2. Replace display panel.

3. Replace display PCB.

4. Replace the display cable.

5. Replace main PCB.

Model 7815 Parcel Bench Scale User’s Manual

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Spare Parts Listing

DESCRIPTION PART NUMBER

Keyboard Panel 1163-13204
Display PCB 7405-15465
Loadcell (75 kg) 7154-16321-75
Main PCB 7405-16315
Power Supply 1148-15536
RS-232 Cable 1140-13842
Remote Display Kit 7300-16577-01
Leveling Feet 7075-15475-02

Call factory for pricing.

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Model 7815 Parcel Bench Scale User’s Manual

Model 7815 Parcel Bench Scale User’s Manual

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1000 Armstrong Drive
Fairmont, MN 56031
Telephone: [phone]
Facsimile: 507-238-4195
E-Mail: [e-mail]
www.wt-nci.com