NCI 7620 Family User manual

User’s Manual
Model 7600
Family
Postal Weight Classifiers
Model 7620
Model 7680

Model 7600 Family PWC User’s Manual
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Risk of electrical shock. Do not remove cover. No user serviceable
parts inside. Refer servicing to qualified service personnel.
Weigh-Tronix reserves the right to change
specifications at any time.
CAUTION
03/09/05 7600_U.P65 PN 7424-15384G e2 Printed in USA

Model 7600 Family PWC User’s Manual 3
Table of Contents
Description .......................................................... 4
Specifications ...................................................... 4
Initial Setup ......................................................... 9
Operation .......................................................... 10
7600 Menu Structure......................................... 14
7600 Menu Structure - Glossary ....................... 15
Diagnostics Mode .............................................. 18
Configuration Mode ........................................... 21
Calibration Mode ............................................... 23
Re-Calibration Mode ......................................... 26
Gravity Mode ..................................................... 28
Review Scale Settings....................................... 30
Communications ............................................... 31
Error Codes ....................................................... 33
Troubleshooting ................................................ 34
Spare Parts Listing ............................................ 37
Installing USB Software .................................... 38

Model 7600 Family PWC User’s Manual
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The NCI 7600 models are digital electronic letter
and parcel bench scales specifically designed for
mail manifest and shipping applications. They are
fast, accurate and reliable. All models use the
Quartzell® transducers for true digital signal
response for increased throughput capabilities
for weighing letters, flats and parcels using one
scale.
7620-32 70 lb/30 kg
0-10 lb x 0.05 oz 10-70 lb x 0.2 oz
0-10 lb x 0.002 lb 10-70 lb x 0.02 lb
0-5 kg x 0.001 kg 5-30 kg x 0.005 kg
n1-5000 n2-6000
7620-50 100 lb/50 kg (100L Mode low res)
0-10 lb x 0.1 oz 10-100 lb x 0.5 oz
0-10 lb x 0.01 lb 10-100 lb x 0.05 lb
0-5 kg x .005 kg 5-50 kg x 0.02 kg
n1-1600 n2-5000
7620-50 100 lb/50 kg (100H Mode high res)
0-10 lb x 0.05 oz 10-100 lb x 0.5 oz
0-10 lb x 0.005 lb 10-100 lb x 0.02 lb
0-5 kg x .002 kg 5-50 kg x 0.01 kg
n1-3200 n2-5000
7620-75 150 lb/75 kg
0-10 lb x 0.1 oz 10-150 lb x 0.5 oz
0-10 lb x 0.005 lb 10-150 lb x 0.02 lb
0-5 kg x 0.005 kg 5-75 kg x 0.01 kg
n1-2000 n2-7500
Default for 100 lb
scale
Description
Now an approved
Weights & Measures
resolution
Specifications
Capacity/
Resolution

Model 7600 Family PWC User’s Manual 5
7680-75 150 lb/75 kg
0-10 lb x 0.1 oz 10-150 lb x 0.5 oz
0-10 lb x 0.005 lb 10-150 lb x 0.02 lb
0-5 kg x 0.005 kg 5-75 kg x 0.01 kg
n1-2000 n2-7500
The 7600 family of bench scales can be used for
general weighing applications when configured
as a scale, or for postal and shipping applica-
tions when configured as a weight classifier.
Model 7620 is approved as legal for trade:
United States - NTEP COC #95-071
Canada - Ministry of Industry #AM 5074
Europe - EEC (OIML) #UK 2476
For use as a Class III device from +5º to 40ºC
Model 7620:
14" L x 12.5" W x 4.2" H
356 mm L x 318 mm W x 107 mm H
Model 7680:
18" L x 18" W x 4.6" H
457 mm L x 457 mm W x 117 mm H
UL/CSA approved inline power supply with 6'
long standard wire line cord with ground
Input: 120 VAC + 10% - 15%
Output: 15 VDC @ .3 Amps
60 (±3) Hz Standard
Agency
Certificates of
Conformance
Frequency
Power Supply
Dimensions

Model 7600 Family PWC User’s Manual
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0.1 amp maximum
42º F - 104º F
+5º C to + 40º C
10% to 95% RH (non-condensing)
Model 7620:
Die cast aluminum base and load bridge.
Plastic ABS or stainless steel weigh platter.
Aluminum quartz digital load cell
Model 7680:
Painted mild steel base with stainless steel
weigh platter. Aluminum quartz digital load cell
Model 7620:
Adjustable center stop
Fixed corner stops
Model 7680:
Adjustable center stop
Adjustable corner stops
400% static loading
200% dynamic loading
Internally mounted 1/2" high seven-digit LCD
Key panel with ZERO and UNITS function keys
Optional remote display with 7ft cable
Level bubble under weigh platter
Adjustable feet in each corner
Automatic zero setting is ±10% of maximum
capacity—active at power up. Manual zero
setting range is ± 2% of maximum capacity—
active using the ZERO key.
Power Requirements
Operating Temperature
Construction
Overload Protection
Display
Scale Leveling
Zero Window

Model 7600 Family PWC User’s Manual 7
Under Capacity Limits
Over Capacity Limits
Sealing
Internal Resolution
Dynamic Response
Communications
Under capacity indication will be given with
dashes appearing on the bottom line of the
display whenever the display is more than 10
division below the initial zero value.
Over capacity indication will be given with dashes
appearing in the upper line of the display when-
ever 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.
1 part in 2,000,000
The time interval of weight applied to scale until a
stable weight:
Transmitted Displayed
0 - 1000d 500 msec 1200 msec
1000d+ 750 msec 1400 msec
Maximum mean average
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 19.2 K
baud. Transmits weight and scale status when-
ever ASCII “W” <CR> is sent by a remote device.

Model 7600 Family PWC User’s Manual
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Model 7600 Family PWC User’s Manual 9
1. Check container for any obvious evidence of
damage.
2. Remove contents of the shipping container.
3. Inspect the scale for shipping damage.
Immediately report any damage to the
shipper.
1. Mount the scale on a stable, level surface
free from air currents and vibration. Be sure
the scale platter does not touch any adjacent
surfaces.
2. To install the scale surface flush with a
countertop, use these dimensions to guide
construction:
Platform Minimum Cutout
Dimensions Dimensions
7620 14" W 14.75" W
12.5" D 13.25" D
4.2" Min Ht.
7680 18" W 18.75" W
18" D 18.75" D
4.6" Min Ht.
3. Loosen the plastic collars (7620) or jam nut
(7680) on the leveling feet. Level the scale by
using the level bubble under the scale platter
as a guide. Be sure all four feet are in firm
contact with the counter, then tighten all
collars (nuts).
Initial Setup
Unpacking the Scale
Installing the Scale

Model 7600 Family PWC User’s Manual
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4. Make sure all power cords, remote display
cables, etc. are not touching the live weighing
surface.
5. Plug the unit into an appropriate (properly
grounded) voltage outlet.
When the unit is first powered on it will perform a
test sequence. During this sequence the display
will show the following:
• The model number and software revision
level
• A numeric counting test of all segments of
the display
• A test of Random Access Memory (RAM)
• A test of Read Only Memory (ROM)
If everything is OK, the display will show zero
weight and the scale is ready for use.
1. With the scale powered on, make sure the
scale platter is empty and the display is at
zero. If it is not, press the ZERO key…
0.000 is displayed.
2. Place an item to be weighed on the scale
platter…
The scale will display the gross weight.
3. Remove the item from the scale platter.
Operation
Power Up
Test Sequence
If RAM or ROM error
is reported, you must
press the UNITS key
to acknowledge the
condition.
Performing a Normal
Weighment
If the scale is outside
the ±10% zero
window, center dashes
are displayed.“_ _ _ _”
Reapply power to
reset the initial zero
setting.

Model 7600 Family PWC User’s Manual 11
Model 7620 or 7680 Resident Display
ZERO Key – The ZERO key will zero the scale if
weight is stable, functions as the NO or SCROLL
key in the Menu mode, and as the INCREASE
key in the Gravity mode.
UNITS Key – The UNITS key can be used to
change the scale unit of measure or to recall the
scale configuration information during the initial
power-up test sequence. This key also functions
as YES or ACCEPT in the Menu mode, and as
the DECREASE key in the Gravity mode.
Remote Display
All NCI 7600 bench scales can have an optional
remote display (shown above with no keyboard
function). If a remote display with keyboard is
used, then Switch 3 (shown in Figure 1) deter-
mines which display keyboard is functional.
Switch 3 Settings
Closed= internal display keys operational
Open = external display keys operational
The remote display must be connected to the
RJ45 port (“DISPLAY”) on power up to operate
properly.
Operational Controls

Model 7600 Family PWC User’s Manual
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The 7600 family powers up in normal weighing
mode ready for weighing operations. You can
access the Menu mode by setting Switch 1
shown in Figure 1 to the OPEN or Menu mode
position.
Access the Gravity setting mode by setting
Switch 2 shown in Figure 1 to the OPEN or
Gravity mode position.
Accessing the
Menu Mode
Accessing the Gravity
Setting Mode
Figure 1
7620 Switch Location
Bottom View
of Model 7680

Model 7600 Family PWC User’s Manual 13
There are four modes available to you with
Switch 1 in the Menu mode or OPEN position.
They are as follows:
1. DIAG Mode – To test areas of the scale’s
function
2. CONFIG Mode – To configure your scale for
your application
3. CAL Mode – To calibrate the scale
4. Re-CAL Mode – To change specific calibra-
tion parameters without having to re-calibrate
the scale.
With Switch 2 in the Gravity mode or OPEN
position, you may increase the “Local” gravity
value by pressing the ZERO key or decrease the
value by pressing the UNITS key.
The structure for these menus is shown in Figure
2. Specific information about each mode and
step-by-step instructions for accessing them
follow.
Menu Mode
Gravity Mode

Model 7600 Family PWC User’s Manual
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Figure 2
7600 Menu Structure
Notes:
(1) The ‘re-calibration values displayed will be the same
as those of the original ‘calibration units of measure.
(2) Will flash “can’t” if originally calibrated for a non-
switching kg capacity/resolution.
(3) Will flash can’t if originally calibrated for a non-
switching lb capacity/resolution.
(4) To change the ‘Local’ gravity setting, press (and hold)
the ZERO key to increase the value, or press (and
hold) the TEST key to decrease the value. When
done, set Switch 2 back to the CLOSED position.

Model 7600 Family PWC User’s Manual 15
30 Calibrates your scale for 30 kilogram
capacity.
50L Calibrates your scale for 50 kilogram
capacity, low resolution.
50H Calibrates your scale for 50 kilogram
capacity, high resolution.
75 Calibrates your scale for 75 kilogram
capacity.
70 Calibrates your scale for 70 pound
capacity.
100L Calibrates your scale for 100 pound
capacity, low resolution.
100H Calibrates your scale for 100 pound
capacity, high resolution.
150 Calibrates your scale for 150 pound
capacity.
Unit on Choosing this option enables the
units key. The units key allows you to
switch between the chosen modes of
measurement during calibration.
Unit Off Choosing this option disables the
units key.
7600 Menu Structure - Glossary
Table 1
Table 2
Table 3

Model 7600 Family PWC User’s Manual
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lb kg With "unit on" option enabled,
pressing the UNITS key switches
between decimal pounds and
kilograms.
lb-oz kg With "unit on" option enabled,
pressing the UNITS key switches
between pounds- ounces and
kilograms.
lb-oz lb With "unit on" option enabled,
pressing the UNITS key switches
between pounds- ounces and
decimal pounds.
1000 g With "unit off" option enabled, the
scale displays weight in kilograms
when calibrated for Kg.
lb ounce With "unit off" option enabled, the
scale displays weight as pound/
ounce when calibrated as a scale or
classifier. Example: (1 lb .05 oz)
Dec lb With "unit off" option enabled, the
scale displays weight in decimal
pounds when calibrated as a scale or
classifier.
Table 4

Model 7600 Family PWC User’s Manual 17
RNG ON Choosing this function activates the
multi-ranging function of the scale.
Display returns to higher resolution
mode only after returning to a stable
zero (0.00). For TYPE APPROVED
applications.
RNG OFF Choosing this function places the
scale in the high resolution through
capacity of the scale. For NON-
TYPE APPROVED applications only.
INT ON Choosing this function activates the
multi-interval function of the scale.
Display returns to higher resolution
mode immediately at multi-ranging
weight value. For TYPE APPROVED
applications.
The NCI 7600 bench scales allow calibration
using less than full capacity weights. Below are
the alternative weights that can be used to
calibrate your scale for its designated capacity.
Alternative Span
Capacity Calibration Weights
lbs
70 10/50/70
100 10/50/100
150 10/50/150
kgs
30 10/20/30
50 10/25/50
75 10/50/75
Table 5
Alternate Span
Calibration Points
Table 6

Model 7600 Family PWC User’s Manual
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The Diagnostic (Diag) mode menu lets you test
specific areas of the scale’s function.
These areas are:
Display (DISPLAY) – Shows the version and
revision of the software, followed by a display
segment test.
RAM (RA) – Performs a nondestructive test of
RAM in the processor. Displays PASS or FAIL.
ROM (RO) – Performs a checksum of all loca-
tions in ROM in the processor. Displays PASS or
FAIL.
Input/Output (I-O) – Data is output by the scale
and through the use of a loopback connector the
data is immediately read back into the receive
channel and verified against what was sent.
PASS or FAIL is displayed. Requires a jumper
(short) between transmit (Pin 2) and receive (Pin
3) data lines.
Division, test w/AZT (DIV-A) – Weight data is
normalized to 1,000,000 counts of displayed
resolution. AZT is enabled (Auto Zero Tracking).
Division, test w/o / AZT (DIV-N) – Weight data
is normalized to 1,000,000 counts of displayed
resolution. AZT is disabled.
Raw Counts (RA CNTS) – Non-normalized QDT
cell data (no zero tracking).
Diagnostics Mode
Diagnostics (DIAG )
Mode

Model 7600 Family PWC User’s Manual 19
Follow these steps to access the tests in the
DIAG menu (Refer to Figure 2).
1. From normal weighing mode, move Switch 1
to the Menu mode or OPEN position.
DIAG is displayed.
2. Press the UNITS key…
DISPLAY is displayed.
3. Press the UNITS key to perform the display
test described earlier…
Display test is performed and shows
DISPLAY after the test is completed.
4. Press the ZERO key…
RA is displayed. This stands for the RAM
test.
5. Press the UNITS key to perform the RAM
test…
PASS or FAIL is displayed briefly. If the
test fails, the unit may have a RAM
memory failure. Try the test a second
time and if FAIL is displayed, contact
your local Weigh-Tronix dealer for
service.
6. Press the ZERO key…
RO is displayed. This stands for the
ROM test.
7. Press the UNITS key to perform the ROM
test…
PASS or FAIL is displayed briefly. If the
test fails, the unit may have a program
memory failure. Try the test second time,
and if FAIL is displayed, contact your
local Weigh-Tronix dealer for service.
Step-by-Step Instruc-
tions for DIAG Mode
Press the ZERO key to
scroll through lists of
selections.
Press the UNITS key
to make a selection

Model 7600 Family PWC User’s Manual
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8. Press the ZERO key…
I-O is displayed. This stands for the
Input/Output test.
9. With a loopback connector in place, press
the UNITS key to perform the I/O test…
PASS or FAIL is displayed. If the test
fails, the unit may have a serial interface
failure. Check your connections and/or
contact your local Weigh-Tronix dealer
for service.
10. Press the ZERO key…
DIV-A is displayed. This stands for the
high resolution test with AZT enabled.
11. Press the UNITS key to perform this test…
The display shows the weight on the
scale at a resolution of 1,000,000 counts.
12. Press the UNITS key to stop the test…
13. Press the ZERO key…
DIV-N is displayed. This stands for the
high resolution test without AZT enabled.
14. Press the UNITS key to perform this test…
The display shows the weight on the
scale at a resolution of 1,000,000 counts.
15. Press the UNITS key to stop the test…
16. Press the ZERO key…
RA CNTS is displayed. This stands for
raw counts.
17. Press the UNITS key to perform this test…
The display shows non normalized cell
data.
DIAG will flash every
10 seconds during the
high resolution test to
remind you that you
are doing a test and
not seeing normal
weight readings.