Avery Weigh-Tronix PC-802 Manuale utente

PC-802 Counting Scale

User’s Manual

2PC-802 Counting Scale User's Manual

Risk of electrical shock. Do not remove cover. No user serviceable

parts inside. Refer servicing to qualified service personnel.

Avery Weigh-Tronix reserves the right to change

specifications at any time.

CAUTION

09/28/05 802_U.P65 PN 29672-0014i e2 Printed in USA

3PC-802 Counting Scale User's Manual

Table of Contents ..................................................................................... 3

Specifications ........................................................................................... 4

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

Keyboard and Display .............................................................................. 5

Key Functions ................................................................................ 6

Scale Setup and Operation ...................................................................... 6

Scale Setup ................................................................................... 6

Unpacking the scale ........................................................... 6

Battery power option ........................................................... 6

Installing the scale .............................................................. 6

Operation as a Scale ..................................................................... 7

Operation as a Counting Scale...................................................... 8

Bulk Sampling ........................................................................ 8

Dribble Sampling .................................................................... 9

Serial Communications .......................................................................... 10

Preset Print Formats.................................................................... 11

Computer Protocol....................................................................... 12

Error Messages ...................................................................................... 13

Table of Contents

4PC-802 Counting Scale User's Manual

Capacity Normal Resolution Expanded Resolution

10 lb 0.001 lb 0.00005 lb

50 lb 0.005 lb 0.0002 lb

100 lb 0.01 lb 0.0005 lb

5 kg 0.005 kg 0.00002 kg

25 kg 0.002 kg 0.0001 kg

50 kg 0.005 kg 0.0002 kg

Overcapacity indication (upper dashes) will occur at 9 divisions over rated

capacity or 102% of full scale capacity.

1 part in 2,000,000 (QDTTM)

Standard digital software filtering

Seven digits of seven-segment, high-contrast black LCD, .5" (1.3 cm) high

with blue electro-luminescent backlight

15VDC at 300mA from a 117VAC 60Hz inline transformer

Optional 12VDC lead acid battery

Bidirectional RS-232 output with selectable baud rate

14° to 104° F (-10° to 40° C)

10 to 90% relative humidity, non-condensing

Specifications

Capacities and Resolutions:

Overcapacity Limits:

Internal Resolution:

Filters:

Display:

Power:

Output:

Operating environment:

5PC-802 Counting Scale User's Manual

This manual tells you how to operate the PC-802 high precision counting

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

methods. See the PC-802 Service Manual for details on configuration and

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

with appropriate remote devices.

Figure 1 shows the keyboard and display of the PC-802. The keyboard has

five keys:

• ZERO

• TARE

• SAMPLE

• PRINT

• COUNT/WEIGH

The display contains seven digits and has four triangular annunciators:

• COUNT

• WEIGHT

• lb

• kg

and four indicators:

• ZERO

• TARE

• STABLE

• LO BAT

Figure 1

PC-802 Keyboard and Display

Introduction

Keyboard and Display

6PC-802 Counting Scale User's Manual

ZERO Zeroes the scale weight or count.

TARE Tares the weight on the scale.

SAMPLE Used to select a sample size and to initiate the

calculation of sample piece weight.

PRINT Sends data to RS-232 device.

COUNT/WEIGHT Toggles between displaying weight and count.

The PC-802 comes with the AC transformer in place beneath the scale. Plug

the unit into a grounded 120VAC source.

If you are going to use the optional DC battery power, remove the trans-

former 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.

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.

Press any key on the front panel to turn the scale on when powered by the

battery. You can set the battery option to shutoff the scale automatically

after a period of time. See the Service Manual for this information.

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 locking nuts.

Key Functions

Scale Setup and Operation

Scale Setup

Unpacking the scale

Battery power option

Installing the scale

Important!

If the scale has been recali-

brated, reset scale resolution

to your needs. Calibration

automatically sets resolution to

10000 divisions.

A PC-802 with the backlight

enabled and a fully charged

battery may be expected to last

12 hours before recharging is

necessary. With the backlight

disabled the battery will last

approximately 24 hours.

7PC-802 Counting Scale User's Manual

Operation as a Scale The PC-802 can be used as a bench scale or as a counting scale. The

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

when the unit is configured for pounds or kilograms.

Indicators let you know when the scale is stable (no motion), when the scale

is at zero and when a tare is in effect.

Follow these instructions for operating the PC-802 as a scale:

1. For AC powered models,

plug the unit into a grounded

120VAC source. . .

For battery powered models,

press any key. . . The scale performs an internal

diagnostics test, then displays the

weight in the weigh mode. The scale

is in the weigh mode when the

WEIGHT annunciator is lit.

2. Zero the scale by pressing the

ZERO key. . . The ZERO indicator 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, press PRINT to print a

weight. Weight information is printed.

The scale will always power up

in normal weighing mode.

8PC-802 Counting Scale User's Manual

There are two sampling methods which are selectable during configura-

tion—bulk sampling and dribble sampling. If you use the bulk sampling

method, you must place all the sample parts on the scale at the same time.

If you use the dribble method, you may place the sample parts onto the

scale a few at a time. The two methods are covered below.

1. In weigh or count mode,

repeatedly press the SAMPLE

key until the sample size you

want is displayed. . . Your display may show ZEro briefly.

This occurs if it takes time for the

scale to find the Zero Reference.

Your display may show no ZEro

briefly if the scale cannot find a Zero

Reference. Check to be sure the

scale is stable and retry step #1 if

this occurs. If all is OK, you will see

the following:

Add 10 is displayed. 10 is the

sample size in this example. The

minimum sample size can be

configured to be 1, 2 , 5, 10, 25, 50

or 100. See the

PC-802 Service Manual for configu-

ration instructions.

2. Place 10 sample parts on the

scale at the same time. . . StAndbY is displayed while the unit

computes the weight of the sample

and displays the count. If the scale

determines that the sample size

meets the minimum accuracy

requirement, 10 will be displayed.

If the scale determines the sample

size does not meet the minimum

accuracy requirement, the display

will prompt you to Add XXX

more parts. When prompting you,

Add will flash.

3. Add the requested samples to

those already on the scale. Wait

for the scale to stabilize, then

press the SAMPLE key. . . StAndbY is displayed while the

scale updates the piece weight. If

the sample meets the minimum

accuracy, the count will be dis-

played.

Press the COUNT/WEIGHT key to toggle between count and weigh mode.

You may tare a container while in either mode.

When you press the SAMPLE

key, the PC-802 performs an

autozero operation. So, if you

have a container on the scale

and press the SAMPLE key,

the container weight will be

zeroed and when you place the

parts to be counted on the

scale, only the weight and

count of the parts will be

computed.

Operation as a

Counting Scale

Bulk Sampling

The minimum sample size is

selectable during configuration.

Important!

If the scale has been recali-

brated, reset scale resolution

to your needs. Calibration

automatically sets resolution to

10000 divisions.

If there is no piece weight, the

scale will not go into count

mode when you press the

COUNT/WEIGHT key.

9PC-802 Counting Scale User's Manual

Dribble Sampling 1. From weigh or count mode,

repeatedly press the SAMPLE

key until the sample size you

want is displayed. . . Your display may show ZEro briefly.

This occurs if it takes time for the

scale to find the Zero Reference.

Your display may show no ZEro

briefly if the scale can not find a

Zero Reference. Check to be sure

the scale is stable and retry step #1

if this occurs. If all is OK, you will

see the following:

Add 10 is displayed. 10 is the

sample size in this example. The

minimum sample size can be

configured to be 1, 2 , 5, 10, 25, 50

or 100. See the Service Manual for

configuration instructions.

2. Place 10 sample parts on the

scale one at a time or all at once.

Wait for the scale to stabilize,

then press the SAMPLE key. . . Add will flash until the SAMPLE key

is pressed, then StAndbY is dis-

played while the unit computes the

weight of the sample and displays

the count.

If the scale determines that the

sample size meets the minimum

accuracy requirement, 10 will be

displayed.

If the scale determines the sample

size does not meet the minimum

accuracy requirement, the display

will prompt you to Add XXX more

parts. When prompting you, Add will

flash.

3. Add the requested samples one

at a time or all at once to those

already on the scale. Wait for the

scale to stabilize and press the

SAMPLE key. . . StAndbY is displayed while the

scale updates the piece weight. If

the sample meets the minimum

accuracy, the count will be dis-

played.

Important!

If the scale has been recali-

brated, reset scale resolution

to your needs. Calibration

automatically sets resolution to

10000 divisions.

10 PC-802 Counting Scale User's Manual

Pinout assignments for the serial communication are shown below.

9-pin Female

Scale

Pin Name Direction

2 TXD OUT

3 RXD IN

5SG -

You may choose to print an Orion printer bar code label. This printer has one

format shown below. It can be chosen through the configuration menu ex-

plained in the Service Manual. The active unit of measure will be printed. This

example shows the weight in LB and the time and date line. If your printer is

not equipped with time and date capability, the time and date line will not

appear on the label.

Serial Communications

Cable Pinouts

A straight through cable (1 to 1,

2 to 2, etc.) can be used from a

9-pin computer serial port to

connect this scale.

Zebra 2443 / Orion

Printer Fixed Format

Label Output

Time and date line only appear if the printer

has time and date capability.

Indice

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