Salter Brecknell PC 150 Manual de usuario

PC-150 Operation Manual



Digital Bench Scale



Revision 1.2

September 14, 2000

Contents subject to change without notice.

Salter Brecknell Weighing Products

1000 Armstrong Drive

Fairmont, MN 56031

Tel (800) 637-0529

Tel (507) 238-8702

Fax (507) 238-8271

E-mail: sales@salterbrecknell.com

Web: www.salterbrecknell.com

Revision 1.2

Table of Contents

Introduction .................................................................................................................................. 1

Installation and Wiring .................................................................................................................2

Display Overview ......................................................................................................................... 3

Keyboard Functions..................................................................................................................... 4

User Menu Mode ......................................................................................................................... 5

Setup Menu Mode........................................................................................................................ 6

Calibration.................................................................................................................................... 8

APPENDIX A: Specifications ....................................................................................................... 10

APPENDIX B: Troubleshooting the Serial Port............................................................................11

APPENDIX C: Displayed Error Codes......................................................................................... 12

APPENDIX D: Warranty and Service Information .......................................................................13

Introduction

The PC-150 Digital Bench Scale is a com-

pact, 150 lb (70 kg) capacity bench scale

with display and five function keyboard. It

comes standard with a bright LED screen for

easy readout, a removable stainless steel

platform, and an RS-232C serial communi-

cation port.

The scale can be configured to display its

divisions in two separate modes – non-

NTEP mode and NTEP mode. The scale is

shipped from the factory configured in non-

NTEP mode. The NTEP mode is supplied

for scales that need to comply with Hand-

book 44 requirements. To re-configure the

scale, please refer to the “Setup Menu

Mode” section of the manual.

The PC-150 uses full duplex RS-232C serial

format for communication with personal

computers or remote displays. The unit can

transmit data on demand or continuously in

several popular data protocols.

The scale’s serial communication parame-

ters are altered through the User menu The

“User Menu Mode” section of the manual

explains how to use the five front panel keys

to maneuver and save settings in this menu.

PC-150 Operation Manual

Installation and Wiring

The PC-150 back panel comes equipped

with a female DSUB-9 connector for the

RS-232 serial port, a jack for DC power

input, a calibration switch and an

ON/OFF rocker switch. To install the

scale, simply plug the enclosed AC Wall

Adapter into the scale’s DC power jack

first, then into an AC outlet (115 VAC

only). Finally, turn the rocker switch to the

ON (“1”) position. The scale is now ready

for use.

ON/OFF

SWITCH DC POWER

JACK RS-232

PORT

ID TAG

CALIBRATION

SWITCH COVER

PC-150 Back Panel

The female 9-Pin RS-232

connector is used to interface

to a PC. Shown at right are

the pin assignments for the

connector.

Pin No. Pin Name

Receive Data

Transmit Data

Signal Ground

235

9-pin RS-232 connector (female)

Shown at right is the suggested cable diagram

for direct connection to a PC. Or, you can order

the optional pre-wired NMC-1 Null Modem Ca-

ble

TO SCALE TO PC

2 RXDRXD 2

TXD 3

S. GND 5

3 TXD

5 S. GND

6 DSR

4 DTR

8 CTS

DSUB9 DSUB9

FIGURE 1. Cable Diagram for Scale to IBM PC

Revision 1.2

Display Overview

ZERO

TARE

NET

GROSS lb

STABLE

PC-150 Display Area

ANNUNCIATOR MEANING

ZERO

Better known as the “Center of Zero” annunciator, this light is active whenever the

displayed weight is within ± 0.25 divisions of true zero.

NET

Indicates that the scale is displaying net weight.

GROSS

Indicates that the scale is displaying gross weight.

TARE

Indicates that the tare weight in the system was established by means of the push

button method.

lb and kg

Indicates the unit of the displayed weight.

STABLE

This light indicates that the scale is in equilibrium.

PC-150 Operation Manual

Keyboard Functions

NET

GROSS

ZERO

kg TARE PRINT

PC-150 Keyboard

KEY FUNCTION

ZERO

Sets scale to display "0" only when a) in Gross mode, b) not in overload and c) not in

motion.

NET

GROSS

Toggles between Gross and Net weight display if a tare has been established.

TARE

Used to establish the weight on the platform as the tare weight. You cannot establish

zero or negative gross weight as a tare. Also, the scale must not be in motion or in

overload.

Toggles between lb and kg units if enabled in the User (“A”) Menu.

Sends "Print" data to serial port if scale is not in motion or in overload.

Revision 1.2

User Menu Mode

The PC-150 scale includes a User menu that contains the scale's serial communication parame-

ters. It consists of 5 separate menu selections, each also with its own sub-menu of choices.

To change a listed parameter, you must first enter the User Menu mode. Once there, four of the

front panel keys become directional navigators to move around in the menus, and one key is used

to save or SET the selections.

To place the unit in User menu mode:

1. Turn the power off to the unit.

2. While holding down the lb/kg

key, turn the power back on.

3. When the display shows "A1",

the unit is in User Menu mode,

and you can release the lb/kg

key. Shown at right are the direc-

tional and SET key assignments

SET

USER MENU CHART

Baud Rate

1200 2400 4800 9600

Data Bits, Parity

8n 7O 7E

Transmission Mode

C d

Serial Data Format

Enable lb/kg Key

0 1

0 1 2 3 4 5

19200

To place the unit back into the Normal Operating mode:

1. Turn off the scale. Turn the scale back on without pressing any keys.

2. The display will go through a digit check, then settle into Normal Operating mode. All front panel

keys will now return to their normal mode of operation.

PC-150 Operation Manual

User Menu Mode / Continued

USER MENU DESCRIPTIONS

NAME/CODE DESCRIPTION CODE/VALUE

Baud Rate Selects the baud rate for data transmission through the serial port. 1200 2400√

√√

√

4800 9600

19200

Data Bits and

Parity

Selects the number of data bits and parity of serial transmission.

"8n" = 8 data bits with no parity bit and one stop bit

"7O" = 7 data bits with odd parity bit and one stop bit

"7E" = 7 data bits with even parity bit and one stop bit

"7n" = 7 data bits with no parity bit and two stop bits

8n√

√√

√

Mode of Serial

Transmission

Selects when data will be sent out of the serial port to a printer or

computer: "C" = Continuous mode; send data continuously

"d" = Demand mode; send data when a PRINT command is issued

from the printer, computer, or scale.

d√

√√

√

Serial Data

Format

Selects the data format to be transmitted via the serial port to a

printer or computer.

"0" = Consolidated Controls Format

"1" = Toledo 8213 Format "2" = NCI 3825Format

"3" = Transcell Technology Format

“4” = Detecto ASD Format “5” = Triner Format

"6" = Fairbanks 70-2453-4 Format

√

√√

√

Disable the

lb/kg Key

Allows the lb/kg key to be disabled so that an operator cannot acci-

dentally press the key and change the displayed units.

"0" = Disable the lb/kg key "1" = Enable the lb/kg key

1√

√√

√

Setup Menu Mode

The PC-150 scale includes a Setup menu that determines the scale’s display mode, allows scale

calibration and also contains the scale's adjustable functional parameters. It consists of 5 sepa-

rate menu selections, each also with its own sub-menu of choices.

To change a listed parameter, you must first enter the Setup Menu mode. Once there, four of the

front panel keys become directional navigators to move around in the menus, and one key is used

to save or SET the selections.

Revision 1.2

Setup Menu Mode /

Continued

To place the unit in Setup menu mode:

1. Turn the power off to the unit.

2. Locate the calibration switch on

the scale’s back panel and toggle

to the opposite position.

3. While holding down both the

ZERO and PRINT keys, turn the

power back on.

4. When the display shows "F1",

the unit is in Setup Menu mode,

and you can release the two

keys. Shown at right are the di-

rectional and SET key assign-

ments

SET

SETUP MENU CHART

Display Mode

Zero Range

Calib. Unit.

0 1

F11

Display Check

F12

Calibration

Press ZERO

key to begin

Press ZERO

key to begin

0 1 100% 1.9%

To place the unit back into the Normal Operating mode:

1. With the scale on or off, toggle the Calibration Switch back to its original position. Turn the scale

back on without pressing any keys.

2. The display will go through a digit check, then settle into Normal Operating mode. All front panel

keys will now return to their normal mode of operation.

PC-150 Operation Manual

Setup Menu Mode / Continued

SETUP MENU DESCRIPTIONS

NAME/CODE DESCRIPTION CODE/VALUE

Display Mode Selects display mode for the scale.

"0" = Non-NTEP mode

"1" = NTEP mode

0√

√√

√

Zero Range Selects the range within which the scale may be zeroed. Note that

the scale must be in standstill to zero the scale. 100%√

√√

√

1.9%

Calib. Unit Selects the primary base unit to be used in the calibration process.

Also the default unit for normal operation.

"0" = primary unit is lb. "1" = primary unit is in kg.

0√

√√

√

F11

Display Check Actuates the function that illuminates all digit segments, decimal

points, and LCD annunciators in a test sequence. Pressing the

ZERO key to scroll down one level begins the test sequence.

Press ZERO key

to begin sequence

F12

Calibration Places scale into the calibration routine. Scrolling down with the

ZERO key one level begins the procedure. Press ZERO key

to begin sequence

F13

Factory Reset This sub-menu will reset all parameters in the “F” and “A” menus to

the default settings. USE WITH CAUTION!!!!! Press the ZERO

key twice to exe-

cute.

NOTE: S

ub-menu F13 restores all parameters in the User (“A”) Menu and Setup (“F”) Menu

to the factory default settings. PLEASE USE CAREFULLY AS YOU MAY LOOSE VITAL

SETUP PARAMETERS!!!

Calibration

ON/OFF

SWITCH DC POWER

JACK RS-232

PORT

ID TAG

CALIBRATION

SWITCH COVER

CALIBRATION MODE KEY FUNCTIONS

ZERO GROSS

NET TARE PRINT

SET

The scale can be calibrated by following the procedure below. The minimum test weight that can

be used is 1.5 lb (0.7 kg), but 100 lb (50 kg) is the recommended test weight.

Revision 1.2

Calibration /

Continued

To calibrate the scale:

1. If you are already in Setup Menu Mode, scroll to “F 12” and press the ZERO key. Otherwise,

turn the scale off and set the Calibration Switch on the back panel to the opposite position.

Turn the unit back on.

The message "C 0" appears on the display briefly, followed by a value which remains on the

screen. Allow a 20 minute warm-up period for the load cell and electronics to become ther-

mally stable.

2. Press ZERO to zero the value, then press the NET/GROSS key to save the zero point value.

3. The display will momentarily prompt "C 1" for the span calibration, followed by "0.00" with one

digit flashing. Place the test weight on the platform.

4. Use the four directional keys to adjust the displayed value to the actual test weight value in

pounds. Increase the flashing digit by pressing the lb/kg key. Decrease the flashing digit by

pressing the ZERO key. The position of the flashing digit may be changed by pressing the

PRINT key or the TARE key.

5. After setting the exact value, press the NET/GROSS key to save the value.

6. If the calibration was successful, the display will show "ECAL" momentarily, then freeze. Exit

the Calibration mode and enter the Normal Operating Mode by positioning the Calibration

Switch back to its original position.

7. If the calibration was not successful, one of the error messages below will appear. Take the

indicated action to correct the problem, then perform a new calibration.

"Err0" - The calibration test weight or the adjusted keyed-in weight is larger than full scale.

Change the calibration test weight or check the keyed-in weight.

"Err1" - The calibration test weight or the adjusted keyed-in weight is smaller than 1% of full

scale. Change the calibration test weight or check the keyed-in weight.

"Err2" - Check keyed-in weight with the actual weight placed on platform.

To place the unit back into the Normal Operating mode:

1. Toggle the Calibration Switch back to its original position.

2. The display will go through a digit check, then settle into Normal Operating mode. All front

panel keys will now return to their normal mode of operation.

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