Avery Weigh-Tronix PC-902 User manual

43000-0018B e1 April 26, 2006

*43000-0018*

PC-902 Counting Scale

PC-902

User Instructions

ENGLISH - USA

The information contained herein is the property of Weigh-Tronix, Inc and is supplied without liability for

errors or omissions. No part may be reproduced or used except as authorized by contract or other written

permission. The copyright and the foregoing restriction on reproduction and use extend to all media in

which the information may be embodied.

Avery Weigh-Tronix is a trading name of Weigh-Tronix, Inc

Trademarks and acknowledgements

Avery Weigh-Tronix, Avery Berkel, Dillon, NCI and Salter Brecknell are registered trademarks in certain

jurisdictions.

All third party brands and product names used within this document are trademarks or registered

trademarks of their respective holders.

IMPORTANT

When programming or configuring the equipment you must ensure that you comply with all relevant

standards and legislation. The example settings given in this book may not be legal for trade with the

public.

Declarations of compliance

United States

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15

of the FCC Rules. 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.

Canada

This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in

the Radio Interference Regulations of the Canadian Department of Communications.

Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils

numériques de la Classe A prescrites dans le Règlement sur le brouillage radioélectrique edicté par le ministère des

Communications du Canada.

page

Contents.........................................................................................................................3

Introduction.....................................................................................................................5

Contents 5

Keyboard and Display ....................................................................................................6

Scale Setup and Operation ............................................................................................8

Unpacking the Scale 8

Installing the Scale 8

Battery Power Option ...............................................................................................9

Internal Battery...................................................................................................9

External Battery..................................................................................................9

Operation as a Scale..............................................................................................10

Operation as a Counting Scale ..............................................................................11

Counting Using Bulk Sampling...............................................................................12

Counting Using Dribble Sampling ..........................................................................13

Using Reverse Sampling for Counting, Method 1 .................................................. 14

Using Reverse Sampling for Counting, Method 2 .................................................. 15

Method #2 - With a Tare Weight....................................................................15

Method #2 - Without a Tare Weight ..............................................................15

Clearing a Tare Weight 15

Serial Communications.................................................................................................16

Cable Pinouts 16

Preset Print Formats ..............................................................................................18

Imp Printer Formats..........................................................................................18

Dymo Label Writer Setra 300 Formats.............................................................20

Zebra 2844 Printer Formats.............................................................................21

PC Protocol......................................................................................................22

NCI Protocol.....................................................................................................24

Broadcast Protocol...........................................................................................26

Error Messages............................................................................................................27

Specifications ...............................................................................................................29

Contents

4PC-905 Counting Scale User Instructions

PC-902 Counting Scale User Instructions 5

1.1 Contents

This manual tells you how to operate the PC-902 high precision counting

scale. You can configure your scale for different options and sampling

methods. See the PC-902 Service Manual for details on configuration and

calibration. This scale also has an RS-232 I/O channel for communication

with appropriate remote devices.

The manual is divided into the following sections:

- Keyboard and Display (page 6)

- Scale Setup and Operation (page 8)

- Serial Communications (page 16)

- Error Messages (page 27)

Introduction 1

6PC-902 Counting Scale User Instructions

Keyboard and Display

Figure 2.1 shows the front panel of the PC-902. This is made up of the

keyboard and display.

Figure 2.1 PC-902 Front Panel

There are six keys to the right of the display:

•PRINT Sends serial data from the RS-232 port to a

connected printer. If the unit is configured for PC

or Broadcast mode, this key will not function. See

the Service Manual.

•UNITS Press this key to change the displayed unit of

measure. If enabled, the choices are lb, kg, g,

and oz.

•COUNT/WEIGHT Toggles between displaying weight and count

when a piece weight is active.

•SAMPLE Used to select a sample size and to initiate the

calculation of sample piece weight.

This key also functions as an ON/STANDBY key

for battery powered scales. Press the key to start

the scale. Press and hold this key for five

seconds to put the scale in standby mode. The

display will show SLEEP.

As long as AC is connected to the scale it will

power up where it left off unless the scale is

SEALED. When sealed it performs the full power

up count down and zero reset.

•TARE Press this key to tare the weight on the scale.

You can also press this after keying in a numeric

tare value to accept it and activate net weight

mode

•ZERO Zeroes the scale weight or count.

Keyboard and Display 2

PC-902 Counting Scale User Instructions 7

The display has seven alphanumeric characters for displaying numbers and

messages. Annunciators are built into the display to indicate the following

functions:

•COUNT Annunciator indicates the scale is in count mode.

•WEIGHT Annunciator indicates scale is in weight mode.

• lb, kg, g, oz Annunciator indicates the current unit of

measure.

•LOBAT Annunciator indicates the battery has 1 or 2 hours

of battery life remaining, depending on battery

installed. See the battery information under 3.3 -

Battery Power Option (page 9). Recharge the

battery when this is displayed.

• STABLE Annunciator indicates weight on the scale is

stable.

• TARE Annunciator indicates a tare weight is in effect

and displayed weight is net weight.

•ZERO Annunciator indicates the scale is at center zero

weight.

8PC-902 Counting Scale User Instructions

Scale Setup and Operation

This section of the manual covers getting your scale ready to work and

operating the scale. This section is divided into the following:

•3.1 - Unpacking the Scale (page 8)

•3.2 - Installing the Scale (page 8)

•3.3 - Battery Power Option (page 9)

•3.4 - Operation as a Scale (page 10)

•3.5 - Operation as a Counting Scale (page 11)

•3.6 - Counting Using Bulk Sampling (page 12)

•3.7 - Counting Using Dribble Sampling (page 13)

•3.8 - Using Reverse Sampling for Counting, Method 1 (page 14)

•3.9 - Using Reverse Sampling for Counting, Method 2 (page 15)

•3.10 - Clearing a Tare Weight (page 15)

3.1 Unpacking the Scale

Unpack the PC-902 and remove the shipping materials from around the

scale.

3.2 Installing the Scale

Place the scale on a stable, level surface out of the way of air currents. Use

the adjustable feet to level the scale. Be sure the scale does not rock back

and forth. Lock the feet in position with the knurled locking rings.

ThePC-902comes with theAC transformerin place beneaththescale. Plug

the unit into a grounded 120VAC source.

If the battery option is installed, charge the unit for 16 hours before using the

scale for the first time.

Scale Setup and Operation 3

PC-902 Counting Scale User Instructions 9

3.3 Battery Power Option

The PC-902 has an internal and an external battery option.

The battery can be recharged in place by connecting the transformer to a

power source and to the scale. The battery will recharge while the scale is

being powered by the transformer. See the Battery Information table below

for information on charge times, etc. The battery circuits are designed with

overcharge protection.

Press the SAMPLE key on the front panel to turn the scale on. Press the

SAMPLE key for five seconds to shut the scale off. You can set the battery

option to shutoff the scale automatically after a period of time. See the

Service Manual for this information.

Internal Battery If you ordered the internal battery, it will be installed in the unit prior to

shipping.

External Battery If you are going to use the external battery, remove the transformer from

beneath the scale, place the battery in its place with padding between the

battery and the scale base and around the battery. Secure the battery with

the restraining strap. Plug the battery cable into the receptacle on the back

of the scale.

10 PC-902 Counting Scale User Instructions

Scale Setup and Operation

3.4 Operation as a Scale

The PC-902 can be used as a bench scale or as a counting scale. The

annunciators indicate when you are in the weigh mode or count mode and

when the unit is configured for pounds, kilograms, grams, or ounces.

While in weight mode, press the UNITS key to change the unit of measure.

Small words at the bottom of the display (LOBAT, STABLE, TARE, ZERO)

let you know when the battery (if installed) is low, when the scale is stable

(no motion), when a tare is in effect, and when the scale is at zero.

Follow these instructions for operating the PC-902 as a scale:

The scale will power up in the counting mode if a piece weight was active

when powered down.

1. For AC powered models, plug the unit into a grounded 120VAC source.

For battery and AC powered models, the unit will power up when

plugged into the outlet or the battery. If the unit is in SLEEP (standby)

mode, press the SAMPLE key. . .

If the display shows SLEEP while

mode, the diagnostics test is

skipped on wake up from the

SAMPLE key.

The scale performs an internal diagnostics test, zeroes the scale,

then displays the count or weight. The scale is in the weigh mode

when the weight annunciator is lit.

2. If necessary, zero the scale by pressing the ZERO key. . .

The ZERO annunciator illuminates.

3. For gross weighing, place the object to be weighed on the scale. . .

Gross weight is displayed.

4. For net weighing, place object to be tared on the scale and press the

TARE key. . .

The TARE annunciator illuminates, and zero weight is displayed.

5. Place material to be weighed on the scale.

Net weight of material is displayed.

6. If your scale is hooked up to a printer or PC and the weight is stable,

press PRINT to transmit data.

Formatted weight and count information is printed. The format is

selectable. See the Service Manual for information on print

formats.

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