Brecknell MBS-150 Manual de usuario

MBS SERIES

ELECTRONIC BALANCE

AWT35-500064

Issue AG

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.

EMC compliance

The following warning may be applicable to your machine.

WARNING: This is a class A product. In a domestic environment this product may

cause radio interference in which case the user may be required to take adequate

measures.

MBS series_u_en_500064.book

MBS Series User Instructions 3

Brecknell is part of Avery Weigh-Tronix. Avery Weigh-Tronix is a trademark of the Illinois

Tool Works group of companies whose ultimate parent company is Illinois Tool Works Inc

No part of this publication may be reproduced by making a facsimile copy, by the making of a

copy in three dimensions of a two-dimensional work and the making of a copy in two dimensions

of a three-dimensional work, stored in any medium by electronic means, or transmitted in any

form or by any means, including electronic, mechanical, broadcasting, recording or otherwise

without the prior written consent of the copyright owner, under licence, or as permitted by law.

This publication was correct at the time of going to print, however Avery Weigh-Tronix reserves

the right to alter without notice the specification, design, price or conditions of supply of any

product or service at any time.

Declaration of Conformity

Manufacturer

Type

Salter Brecknell

MBS

Corresponds to the requirements of the following EC directives:-

Electro Magnetic Compatibility

Low Voltage Directive:

EMC 89/336/EEC

LVD 2006/95/EC

The application harmonised

standards are:

EN60950-1: 2002, EN61000-6-3: 2001

EN61000-6-1:2007

4 MBS Series User Instructions

MBS Series Precision Balance

Thank you for purchasing the Model MBS precision balance. Please read all operating

instructions carefully before using and note the following items to ensure accurate

readings.

1.0 Description

lThe MBS balances use a high precision load cell and microcomputer for

simple operation with accurate, stable weight readings displayed on the large

liquid crystal display.

lThis balance is an excellent choice for laboratory use and educational

applications, however, it is not recommended for use in production lines, food

preparation areas or any other environment where high heat, cold, humidity

or vibration are present.

lDo not overload the balance. This will damage the load cell and void the

warranty.

lInspect the platter, draft shield and housing regularly for damage.

lRefer to the troubleshooting chart at the end of this manual for more details.

lDo not attempt to repair the balance if you have a problem. Contact your

local Salter Brecknell representative.

2.0 Unpacking

Please check the contents of this box carefully. Your MBS balance should come with

one of each of the following:

lElectronic Balance

lStainless Steel Weighing Platform

lUser Manual

l6 “AA” batteries (300-600 gram unit); 8 “AA” batteries (1200-6000 gram unit)

3.0 Installation

lPlace the balance on a stable, level surface.

lLevel the balance using the adjustable feet and level bubble.

lRemove the protective film from the stainless steel platform.

lGently place the weighing platform on the mounting posts on the top of the

base of the balance. The base’s posts should fit easily into the holes on the

bottom of the platform and the platform should be flat and level.

MBS Series User Instructions 5

Do not force the platform as this can damage the balance.

4.0 Key Functions

The following figure shows the front panel with six push buttons Each key function is

explained on the next page..

On/Off Turns the balance on or off or returns balance to normal weighing mode.

Count Places the balance in piece count mode.

Cal (stands for Calibrate) Enters calibration mode.

Tare Used to tare off, up to 100% of balance capacity, an empty container and

to reset the balance to zero. Use of tare with a weight or container

reduces the scale’s capacity by the tare value stored. Also works like

Enter in some modes.

Mode Toggles the backlight on or off. To extend battery life, turn backlight off.

Also toggles between options in calibration mode.

Units Allows you to scroll through and select from the available units (g, oz,

ozt, dwt, lb) as well as count (ct) and percentage (%)

5.0 Scale Operation

This section covers the scale operations of weighing and counting.

Always make sure that the balance is on a clean, dry, level and solid surface.

Simple Weighing

1. Turn the balance on. The balance will go through a series of tests and then

display all zeros (0’s).

2. Press the Unit key until the desired unit of measure is displayed on the far right

of the display.

g/oz

On/Off Count Cal Tare Mode Units

6 MBS Series User Instructions

3. Press the Tare key if the display no longer reads zero.

4. Place item(s) to be weighed on the weighing platform. The weight will be

displayed with the appropriate unit of measure next to it.

5. Remove the item(s) from the balance and repeat steps 2 - 5 to continue

weighing.

Tare Weighing

If you want to do net weighing, such as weighing objects in a container, follow these

steps.

1. Turn the balance on. The balance will go through a series of tests and then

display all zeros (0’s).

2. Press the Unit key until the desired unit of measure is displayed on the far right

of the display.

3. Place the container to be tared on the weighing platform and press the Tare key.

The display should return to zero.

4. Place item(s) to be weighed in the container. The weight will be displayed with

the appropriate unit of measure next to it. The weight displayed is the net weight

and does not include the weight of the container.

5. Remove the item(s) from the container and repeat steps 3 - 5 to continue

weighing with the same container.

If you remove the container, the balance will show a negative weight. Press the Tare

key to return the balance to zero.

General Counting Function

The MBS series will count parts based on the weight of a reference sample of 5, 10,

20, 30, 40 or 50 pieces. For best results, the pieces used should be of equal weight.

Also, the larger the sample, the more accurate your counts will be. Once you have

created this reference sample, it will remain in memory until a new sample is recorded,

even when the balance if turned off. This section explains the counting function in

further detail.

1. Turn the balance on and allow it to come to zero.

2. Press the Count button. The balance will display “CON pcs”.

If you are using a container to hold the pieces, place the empty container on the

weighing platform at this point.

3. Press Tare. The balance will display the message “Add 5”.

MBS Series User Instructions 7

4. Press Mode until the number of pieces in your sample is displayed. You can

choose from 5, 10, 20, 30, 40 or 50.

5. Place your sample on the platform and press Tare.

6. There will be a short pause and then the balance will show the number of the

sample on the screen.

If the balance displays the message “PC Err”, the sample size was too small for the

balance and a larger sample will be required.

7. Remove the sample from the balance. The balance is now ready to count.

8. Add pieces to the balance / container. The balance will show the number of

pieces on the display.

9. Press the Unit key to exit piece counting and return to normal weighing. You

can return to piece counting by pressing the Unit key until “pcs” is displayed.

General Percentage Function

The % refers to the percentage function of the MBS series scales. You can achieve

this by following these steps:

1. Put the object on the platform. After the reading is stable, press and hold the Tare

key until it displays 100%. This means that the scale defines the current weight

as 100%.

2. Put a new object on the platform and the display gives you a percentage based

on the defined weight from step 1.

Disable the AUTO OFF Feature

1. Power on the scale, when the scale is in self-checking process, press the Mode

key three times.

2. The scale will display “F3AUTO”, press the Tare key.

3. The scale will display “AUTO OFF” or “AUTO ON”, if “AUTO OFF” is displayed,

press the Mode key to switch it to AUTO ON.

4. Power off the scale. Power on the scale again to check whether the auto off

function works.

Note: auto off time is 5 minutes.

8 MBS Series User Instructions

6.0 Calibration

Occasionally, you may need to calibrate your balance with an appropriate weight.

There are two types of calibration possible: sensitivity calibration and linear

calibration. Linear calibration should only be attempted by a qualified service

technician with correct weights. This section explains how to perform each type of

calibration.

Sensitivity Calibration

1. With the scale in regular weighing mode, press the Tare button to zero the

balance.

2. Press the Cal button.The balance will show “Scale”.

3. Press the Tare button. The balance will display one of the accepted calibration

weights.

The balance can only be calibrated in grams.

4. Press the Mode key to toggle between acceptable calibration weights.

5. Press Tare. The balance will flash “0” briefly and then flash the calibration

weight.

6. Place the correct amount of weight (in grams) on the platform and press the

Tare button.

7. The calibration weight will continue to flash briefly and then become stable.

8. Once the weight is stable, remove the weight from the balance. The scale has

now been calibrated and is in regular weigh mode.

9. Press the Tare key if the scale does not return to zero.

Linear Calibration

1. With the scale in regular weighing mode, press the Tare button to zero the

balance.

2. Press the Cal button.The balance will show “Scale”.

3. Press the Mode button. The balance will show “Line”

4. Press Tare. The balance will flash “0” briefly and then flash the first calibration

weight.

5. Place the correct amount of weight (in grams) on the platform and press the

Tare button.

6. The balance will flash the next calibration weight.

MBS Series User Instructions 9

7. Place the appropriate amount of weight on the weighing platter and press Tare.

8. The calibration weight will continue to flash briefly and then become stable.

9. Once the weight is stable, remove the weight from the balance. The scale has

now been calibrated and is in regular weigh mode.

10. Press the Tare key if the scale does not return to zero.

7.0 Communications & Printing

The MBS balances can be connected to a PC or appropriate printer using a null

modem cable (not supplied). The balance will transmit the gross or net weight and unit

or the number of pieces if you are using the piece counting function.

Connecting to PC

1. Connect the appropriate cable to the 9 pin D connector on the balance.

2. Connect the other end to an available COM port on your PC.

When connecting to a PC or other device, you must cross the transmit and receive

lines.

3. Start HyperTerminal or similar utility.

The table below shows a list of available commands and their responses.

All commands are capital letters. There is no carriage return after the command.

Balance RS232

connector

5 (GRND)

3 (TXD)

2 (RXD)

9 (Empty) 5 (GRND)

3 (TXD)

2 (RXD)

1 (Empty)

Sample PC RS232

connector

RS232 Data

Baud Rate = 9600

Data Bits = 8

Parity = None

Stop Bits = 1

10 MBS Series User Instructions

Table 1.1 Available Serial Commands

Change Print Settings

You can select either Continuous Print or Print When Stable.

1. Remove all weight (except platter) and power the balance off.

2. Power the balance on.

3. During countdown (9999.99, 8888.88, 7777.77), press the Mode key. The balance

displays F1 A2t.

4. Press the Mode key. The balance displays F2 prt.

5. Press the Tare key. The balance displays either Pt-0 (continuous print) or Pt-1

(bi-directional communication) Pt-1 is the default.

6. Press the Mode key until balance displays Pt-0.

7. Press the Tare key. The balance displays either PCon (print continuous) or PStb

(print when stable).

8. Press the Mode key to toggle between P2t6 and PCon.

9. Press the Tare key to accept the setting on the display.

10. Press the On/Off key when finished. The balance powers off and the changes

are saved.

11. Connect the balance to the printer or other device.

12. Power the balance on.

Command Response Command Response

OOff TTare

MDisplays the

Counts

FMode

CCal UUnits

PPercentage WReturn displayed

weight

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