Salter Brecknell B120 User Manual

MODEL B 120

Counting Scale

User Manual

p/n AWT35-500140 Issue AB July 2007

Warnings

Safe Installation
Pluggable equipment must

be installed near an easily accessible socket
outlet.
The socket outlet must provide a protective

earth contact and the electrical
supply to the outlet must provide over current protection of an appropriate
rating.
Permanently protected equipment must have a readily accessible disconnect

e

vice incorporated in the fixed wiring.

d
The fixed wiring must provide a protective

earth connection and the supply

must incorporate over current protection of an appropriate rating.

USA

If the scale is connected to a 240V supply, the receptacle must be protected

y

a 15 amp circuit breaker.

b

This equipment is intended for

use in dry conditions.

For your protection, all mains (110V or 240V) equipment used out of
doors

or in wet or damp conditions should have adequate

environmental protection.

We recommend:

• a correctly fused source protected by an approved outlet/connector that
complies with local legislation (BS7071 or BS7288 in the UK).

• or an RCD protected supply to BS EN 61008 or BS EN 61009 (UK & Europe)

IF IN DOUBT, SEEK ADVICE FROM A QUALIFIED ELECTRICIAN.

Declaration of Conformity

Manufacturer Salter Brecknell
Type B120

Corresponds to the requirements of the

Electro Magnetic Comp

atibility

Low Voltage Directive:
The application harmonised

standards are:

A copy of the original signed declaration for this instrument is available from
the UK address at the end of this book.

B120_u_AWT35-500140.book

following EC directives:-

EMC 89/336/EEC
LVD 73/23/EEC

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

1.0 Introduction and General Information

Thank you for purchasing the Model B 120 counting scale. Please read all
operating instructions carefully before using and note the following items:

• Unpack the scale and install the battery if it wa
the charging unit into a properly grounded outlet. The charging plug fits
into a receptacle on the bottom of the scale, in the left rear corner.
Charge the battery for a full 12 hours before using the scale. Battery life
when fully charged is approximately 20 hours.

• Place the scale on a stable, level surface.

• Level the scale using the adjustable feet and the bubble level at the lower
left of the front panel. Tighten the locking ring on each foot once the scale
is level.

• Apply power to the scale by moving the power switch, located on the
bottom of the scale, to the ON position.

• The Low Batt annunciator will light when the battery voltage gets low. If

voltage drops too low for operation, a beeper will sound for two minutes
before the scale automatically shuts off.

• The scale battery will charge while operating on AC power.

s not factory installed. Plug

2.0 Battery Installation

Follow these steps if you need to install the battery.

Remove the screw holding the battery compartment lid on the bott
scale.

om of the

1

Connect the red wire to the red battery terminal and the black wire to the black
battery terminal.

Place battery in the compartment with the padding placed as shown and

place the battery cover and tighten the screw.

re

Note: T

2

o improve battery life, turn off the scale using the power switch.

3.0 Front Panel

The front panel, shown in Figure 1, consists of three display windows
(WEIGHT, PIECE WEIGHT, and
the bubble level window.

Figure 1: B120 front panel

Annunciators

Annunciators are bright LEDs next to symbols or text. They appear below the
three displays and each is explained below.

Under the WEIGHT display:

Zero This

Tare This lights when a tare is in effect. Weight displayed is net weight.

lights when the weight on the scale is at 0.

COUNT), the keypad, nine annunciators and

kg This lights when the unit of measure in the WEIGHT display is

kilograms.

lb This lights when the unit of measure in the WEIGHT display is

pounds.

Under the PIECE WEIGHT display:

g This lights when the PIECE WEIGHT unit of measure is grams.

lb This lights when the PIECE WEIGHT unit of measure is pounds.

Under the COUNT display:

Low Batt This lights when the battery power is low. Recharge the battery or

use AC power to continue using the scale.

AC This lights when the AC power is connected to the scale.

CHG This lights when the battery is charging.

3

Key Functions

Each of the keys shown in Figure 2 is explained below.

Figure 2: B 120 keypad

0-9 Used

Units lb/kg Used to switch displayed weights between kg and lb, and piece

Zero Return displayed weights and counts to zero for accurate

Enter Used to confirm or save entered data from keyboard.

Tare Used to zero off, up to 100% of capacity, an empty container or

Accu + Used to add the displayed counts to a piece count accumulator

Clear Erase a keyed in value from the display if an error has been

Pcwt (stands for Piece Weight) Used for keyboard entry of a known

Upper Used to set an upper limit quantity for count check feature.

Lower Used to set lower limit quantity for count check feature.

for keyboard entry of piece weight, sample size, and upper

and lower limit settings.

weight units between grams and decimal pounds.

weighing and counting. Zero range capability is 5% of scale
capacity.

weight, not required in the calculation of an average piece weight.
Use of tare will reduce the scale’s maximum weight capacity, by
the tare value stored.

(Memory +) and only accumulate when there is a percentage of
weight change.

made.

average piece weight.

On/Off Used to turn off display for extended battery life or to reset the

scale to normal weighing mode.

4

4.0 Scale Operation

This section covers the various scale operations, such as weighing, counting,
accumulation, etc.

Simple Weighing

1. Turn the scale on and zero the display, if necessary, by pressing the Zero

key. Be sure the scale is displaying weight in your preferred unit of
measure. Change it using the Units key, if necessary.

2. Place item

Weight of the item(s) is displayed in the WEIGHT window.

3. Remove the item(s) from the scale and repeat steps 1-3 to weigh the
n

ext item(s).

(s) to be

Tare Weighing

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

1. Turn the scale on and zero the display, if necessary, by pressing the Zero

y. Be sure the scale is displaying weight in your preferred unit of

ke
measure. Change it using the Units key, if necessary.

2. Place th

e item to

Weight of the item is displayed in the WEIGHT window.

weighed on the scale…

be tared (usually a container) on the scale…

3. Press the Ta r

The weight is tared, 0 weight is displayed and th

lights.

4. Place item(s) to be

Net weight of the item(s) is displayed.

5. To remove a tare, remove everything from the scale platform and press
the Ta

re key…

0 weight is displayed

is now in gross weighing mode.

6. Repeat the steps above for other tare weighments.

e key…

e Tare annunciator

weighed on the scale…

and the Tare annunciator light turns off. The unit

5

General Counting Information

If there is no piece weight, the scale will not go into count mode.

Once a piece weight is established, it remain
is automatically calculated by a sampling process.

After counting items, remove them and the displa
press the ZERO key.

s active until another piece weight

y should return to zero. If not,

A counting scale needs a minimum amount of we
accuracy. Salter Brecknell recommends the sample weight be a minimum of

0.1% of scale capacity. The sample weight is the total weight of your sample
items. The table below shows the minimum sample weights recommended to
guarantee the most accurate counts.

Minimum Sample Weight

Scale Capacity LB Grams

6 kg/12 lb 0.02 6
15 kg / 30 lb
30 kg / 60 lb 0.1 30

After entering the number of samples and pressing the Enter
window displays the number entered. If the piece weight window shows SPL
PCS, press the CLEAR key, and increase your sample weight.

0.05

ight to calculate counts with

15

key,

the count

Counting by Sampling

Follow these steps to count items using the sampling method.

For count accuracy all items should
occur if parts vary in weight.

1. Turn the scale on and zero the display, if necessary, using the Ze
Be sure the scale is displaying weight in your preferred unit of measure.
Change it using the Units key, if necessary.

2. Place a
weight the scale will use to calculate a piece weight…

known n

umber of objects on the scale. This is the sample

be uniform in weight. Errors in count will

ro key.

Weight of the items is displayed in the WEIGHT

3. Key in the number of objects you placed on the scale…

SP

L.PCS is displayed in th

you keyed in is displayed in the COUNT window.

6

e PIECE WEIGHT window and the number

window.

4. Press the Enter key to accept the keyed in number. (If you make an
error in keying in the number, press the Clear key to clear the count in
the COUNT window and re-key the correct number.)…

The scale calculates the weight of each piece (the piece weight) and

i

splays the count in the COUNT window.

d

5. Place the items to b

The total weight, piece weight and count of the items will be shown in
the thre

6. Remove the items from the scale and repeat steps 5 and 6 to count
item

7. Repeat steps 1-6 to count items of a different piece weight.

Note: Piece weight
pounds.

Note: The original piece weight will be held in memory until a new piece
weight has been determined. Turn the scale off, then on to return to normal
weighing mode.

e display windows respectively.

s of the same piece weight.

e counted on the scale…

is displayed in grams/decimal grams or LB/decimal

Counting by Entering a Known Piece Weight

You can enter a known piece weight and begin counting without sampling.

This can also be used with the tare function active.
weight, place the item to be tared on the scale, press the Tare key and
continue with counting as described below.

Follow these steps:

After you have set the piece

urn the scale on and zero the display, if necessary, using the Ze

1. T
Be sure the scale is displaying weight in your preferred unit of measure.
Change it using the Units key, if necessary.

2. Press the Pcwt key…

d

PC.t is displaye

the WEIGHT and PIECE WEIGHT windows.

3. There is a decimal point already in the PIECE WEIGHT window. Key in
th

e known piece weight, in decimal pound or grams, using the numeric
keypad so that the piece weight in the PIECE WEIGHT window is
correct, then press the Enter key to accept this piece weight. (If you
make an error in keying in the number, press the Clear key to clear the
number and re-key the correct number.)

The counting mode activates using the entered piece weight.

in the COUNT window and zeroes are displayed in

ro key.

7

4. Place the items to be counted on the scale…

The total weight, piece weight and count of the items will be shown in
the thre

5. Remove the items from the scale and repeat steps 4 and 5 to count
item

6. Repeat steps 2-5 to count items of a different piece weight.

nting can also be done while using a tare. After you have set the piece

Cou
weight (step 3)
continue with counting as described in step 4.

e display windows respectively.

s of the same piece weight.

, place the item to be tared on the scale, press the Tare

key and

Counting Using Upper and Lower Count Limits

You can do counting with an alert system to tell you when you have an
acceptable number of items on the scale. This can be handy when you want to
repeatedly fill bags to the same count. Use the instructions below to set an
upper count limit and a lower count limit. When your counts fall between these
numbers (inclusive) a beeper sounds to let you know you’ve hit your target
number.

urn the scale on and zero the display, if necessary, using the Ze

1. T
Be sure the scale is displaying weight in your preferred unit of measure.
Change it using the Units key, if necessary.

ro key.

2. Use

3. Press

4. Press the Clear key to

5. Press the Lo

6. Press the Clear key to

7. Place items to be counted on the scale until you hear the alert beeper…

sampling or entering a known piece weight to set the piece weight.

the Upper key…

uP. PCS is shown in the

appears in the COUNT window.

in the upper acceptable count of items. (You can set the upper and

lower limit to the same number to have the alert beeper sound just
on that count.) Press the Enter key to accept this number…

wer key…

Lo. PCS is shown in the PIECE WEIGHT wind

appears in the COUNT window.

in the lower acceptable count of items. (You can set the upper and

lower limit to the same number to have the alert beeper sound just
on that count.) Press the Enter key to accept this number…

The scale returns to count mode.

he count will be within the upper and lower limits you have set.

T

PIECE WEIGHT window and a number

clear the number from the COUNT window. Key

ow and a number

clear the number from the COUNT window. Key

8

8. Remove the items from the scale and repeat steps 7 and 8 to weigh the
next batch of items.

Counting with upper and lower limits can be done while using
have set the piece weight (step 2), place the item to be tared on the scale,
press the Tare

key and continue with counting as described in step 3.

a tare. After you

Note: Upper and lower limits will remain in memory until
0, by repeating steps 3-6.

you reset the limits to

Accumulating Counts

The scale can accumulate the counts from different weighments into a total
value stored in memory. Follow these steps to perform accumulations.

1. Follow the different counting

page 5 to count items placed on the scale.

2. When the count is displayed, press the Accu
count to memory…

The count is added into memory, and temporarily, Add is displayed in

the WEIGHT window, the number of accumulations is displayed in
the PIECE WEIGHT window and the accumulated count is shown in
the COUNT window. The display automatically returns to the normal
counting mode.

3. Remove the items,
and repeat the process of putting items on the scale and pressing the
Accu+ key to accumulate the counts…

The total of accumulated counts is shown in the COUNT window.

4. To clear the accumulator, press Accu+
accumulated data is displayed…

allow the scale to return to zero weight and count,

methods described in Scale Op er at ion on

+ key to accumulate the

key, then the Clear key while the

Memory is cleared of the accumulated data and the scale returns to

mal counting mode.

nor

Note: To view the accumulator data, remove all weight from the scale and
press Accu+. The data is temporarily displayed before returning to count
mode.

9

5. The scale will not accumulate more than 999,999 times, or show an
accumulated quantity over 16,777,215. If this occurs the display will

show ------. This means over range.

When the accumulated quantity is more than the six digit display can
show (999999), it

digits H XXXX) then the second four digits (L XXXX). The H stands for
High order numbers and the L for low order numbers.

For example: Whe

COUNT window will alternately flash H 1234 and L 5678.

Note: Remove the counted items from the scale and let the scale return to
stable condition before you can count more items and perform a successful
accumulation again.

will be displayed by alternately flashing the first four

n

the accumulated quantity is 12,345,678, the

5.0 Calibration

You should periodically calibrate your scale to ensure accuracy. Follow these
steps to calibrate the scale.

Note: Us
calibration.

Set the calibration switch to the ON position for calibrating. The
located on the bottom of the scale in a round depression in the base.

Push the slide switch, shown in Figure 3, to the
mode.

e of certified calibr

ation weights is recommended for proper

switch is

position shown for calibration

10

Figure 3: Calibration switch

Access to the calibration switch may be sealed with a lead-wire combination
on the bottom of the scale. Prior to removing the lead seal, check to see if the
test switch is in the correct position by following step 1 below. If you are not
allowed access, remove the lead-wire seal.

Note: Y
Of

ou can exit the calibration procedure at any time by pressin g th e On/

f key.

1. To enter calibration mode, while in normal weighing mode, hold the Ze
and On/Off keys at the same time until…

The scale beeps and, if the calibration switch is in the ON position,

WEIGHT window shows CAL. oN. If the display shows CAL.oFF,

the
change the calibration switch position. See Figure 3.

The PIECE WEIGHT window shows Unit. 1 or Unit. 0. If Unit. 1 is
displayed, the calibration unit of measure is pounds. If Unit. 0 is

displayed, the calibration unit of measure is kilograms.

2. Press the Units

key to toggle between pounds and kilograms. When the

unit you want is displayed, press the Enter key to accept it…

The scale beeps and unLoAd is displayed in the PIECE WEIGHT

ow. A number representing raw A to D counts is displayed in the

wind
COUNT window.

3. Remove all

weight from the scale, wait for the scale to be stable (the

Unit annunciator stops flashing) and press the Enter key to capture the

zero point…

If the scale successfully captures the zero point, the scale beeps and

LoAd is displayed in the PIECE WEIGHT window.

ro

4. Load a test weight that is between 25% and 100% of full capacity onto

e center of the weight platter, wait for the scale to be stable (the Unit

th
annunciator stops flashing) and press the Enter key to capture the
span.

.

When the scale captures the span, InP

Ld is displayed in the PIECE
WEIGHT window and 0.000 is displayed in the COUNT window. InP.
Ld stands for input load weight.

5. Remove the weight from the scale and key in the amount of weight you
sed. The weight entered will display in the count window. Press the

u
Enter key…

When the scale records this weight, unLoAd is displayed in the

PIECE WEIGHT window.

11

6. Press the Enter key to confirm the zero point again.

The scale goes through the start up routine and ends in normal

hing mode.

weig

If there is any error in the calibration, the scale will show CAL. Err.

The scale will try to return to the previous step.

7. If you have problems, press the O
and try the procedure again.

8. Move the calibration switch back to normal weighing mode.

n/Off key to exit the calibration mode

6.0 View Voltage and A/D Counts

You can view the battery voltage and A to D counts for diagnostic purposes.
Follow these steps:

1. With the calibra
normal mode, press and hold the On/Off and Tar e keys at the same time
until the scale beeps…

Vol. X.X is displaye

displayed in the PIECE WEIGHT window and the A to D counts
(code) is displayed in the COUNT window.

Vol. stands for voltage and X.X is the current voltage of the battery. If
no battery is installed or the connection is not complete, Vol. 7.2 will

be displayed.

When the current working voltage is lower than 5.7V, the Low Batt

annunciator will light.

When the voltage is lower than 5.5V, the Low Batt annunciator will

light and the beeper will sound for approximately two minutes before
the scale turns itself off.

tion switch in the normal weighing mode and the scale in

d in

the WEIGHT window, the word codE is

The A to D counts for an empty scale should be between 5000 and
100,000. This should be a positive number. The A to D counts for a
scale at full capacity should be above 300,000. If the A to D counts
are outside of these ranges or calibration and normal weighing
cannot be done, your scale’s loadcell has been permanently
damaged.

o exit this mode, press the On/Off key…

2. T

The scale returns to normal mode.

12

7.0 Setting the Auto-Off Timer

You can set an auto-off timer so that the scale will power down automatically
after a period of inactivity. This functions only when the scale is powered by the
battery.

1. Fro

2. Key in the number of minutes of scale inactivity that will trigger the auto-

m normal mode, press and hold the On/Of

same time until the scale beeps…

SEtUP is displayed in the WEIGHT window, A.oFF.t

the PIECE WEIGHT window and the current value for the auto-off
timer is displayed in the COUNT window. You can choose from 0 to
30 minutes. If you pick 0, auto-off is disabled and the scale will not
power down automatically.

ff function and press the Enter key to accept this value…

o

The scale returns to normal mode.

f and Accu keys at the

is displayed in

8.0 Setting LED Brightness

You can set the LED brightness by following these instructions:

1. In normal weighing mode, hold the ON/
same time until

SETUP is displaye
brightness) is displayed in the PIECE WEIGHT window, and x (x=1-3)

is displayed in the COUNT window. This means that the LED

brightness is currently set to x.

d in the WEIGHT window, Led.brn (LEd

OFF and ENTER keys at the

2. Press the 1 2 or 3 numerical key to change the brightness level. Three

the brightest level. When the brightness you want is displayed, press

is
the ENTER key save this setting.

The scale will auto-reset and return to normal weighing mode.

13

9.0 Displayed Messages

¯ ¯ ¯ ¯ ¯ ¯ Scale overloaded

- - - - - - Too many accumulations or accumulated counts too high

_ _ _ _ _ _ Weight signal is too small
0¯ ¯ ¯ ¯ ¯ The zero point is too high
0_ _ _ _ _ The zero point is too low
EEP.Er0 The EEPROM can’t be accessed
EEP.Er1 The parameters in EEPROM are not same with backup data
EEP.Er2 The setting parameter(s) is not in normal range, or the parameter

has not been set

CAL.Err There is an error in calibration: maybe the loaded weight is too

small or the input weight is not correct.

Ad¯ ¯ ¯ ¯ Input signal of ADC is over max. range
Ad _ _ _ _ Input signal of ADC is below min. range;
CAP Displaying data relating to capacity
UoL Displaying data relating to voltage
Add The accumulated data
PC.t: Data about piece weight
SPL.PCS Data about sample pieces
uP.PCS Data about upper limit pieces
Lo.PCS Data about lower limit pieces
unLoAd Unload weight on the platter
InP.Ld Input loaded weight’s number
CAL.oN Calibration enable switch is ON
CAL.oFF Calibration enable switch is OFF

14

10.0 Specifications

Model B120

Capacity 6kg/12lb

Display

Resolution

Max. Display

Weight

6kg x 0.001kg
12lb x 0.002lb

6.009kg/

13.248lb

15kg/30lb

15kg x 0.002kg

30lb x 0.005lb

15.018kg/33.110lb 30.045kg/

TARE Range 0-100% of full scale capacity

ZERO Range Power on:calibration zero point±10% of full scale

capacity;

Zero key:power on zero point±5% of full scale capacity

Count Display

0-16777216

Range

Conversion

1Lb=0.45359237kg or 1Kg=2.20462262Lb

factors

used for Kg and

Lb

Power supply

a). 12VDC 500mA output, with positive center, AC adapter

30kg/60lb

30kg x

0.005kg

60lb x 0.010lb

66.240lb

. 6V4A rechargeable lead-acid battery

b)

Average working current:

120mA when LED’s brightness is set to 1

200mA when LED’s brightness is set to 2(default)

300mA when LED’s brightness is set to 3

Note: The LED life is shortened when set to level 3.
Note: The rechargeable battery is fully charged after 12 hours and the scale can work

continuously for approximately 20 hours. Once voltage drops below 5.7V, the Low Batt
annunciator lights. Once the voltage drops below 5.5V, the scale beeper will sound and
work for approximately two minutes before powering off.

When the scale is powered by the AC adapter, the AC annunciator will turn on.
When the battery is charging, the CHG annunciator lamp will be on.

15

16

UK and EUROPE

BrecknelO

P.O, Box 9533
Smethwick
West Midlands
B66 2TE
Tel: [phone]
Fax: [phone]
Email: sales@
Web Site: www.

brecknellVFDOHV.co.uk

brecknellscale.co.uk

USA

Brecknell

1000 Armstrong Drive

irmont, MN 56031

Fa
Toll free: 800-637-0529 Tel: [phone] Fax: [phone]
Email: [e-mail]
www.brecknellscales.com