Rice Lake QB Series User manual

42194
QB Series
Precision Balance
Operation Manual

© 2003 Rice Lake Weighing Systems. All rights reserved. Printed in the United States of America.
Specifications subject to change without notice.
January 2003
Contents
About This Manual................................................................................................................................... 1
1.0 Introduction.................................................................................................................................. 1
1.1 Unpacking and Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 General Care and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.3 Installation Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.4 Installation Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.5 Special Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.6 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.7 Powering Up the QB Series Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.8 Powering Down the QB Series Balance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.0 Weighing Operations ................................................................................................................... 6
2.1 Units of Measure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Changing Units of Measure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 General Weighing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.4 Weighing with a Tare. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.5 Batching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.6 Removing the Tare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.7 Weighing with the Comparator Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.7.1 Comparator Function Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.7.2 Basic Over/Under Parameter Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.8 Setting the Upper and Lower Comparison Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.8.1 Reference Sample Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.8.2 Digital Reference Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.8.3 Weighing with the Comparator Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.8.4 Deactivating the Comparator Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.9 Operating the Counting Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.9.1 Counting Function Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.9.2 Programming the Average Piece Weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.9.3 Using the APWR (Automatic Piece Weight Refinement) Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.9.4 Using the Counting Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.9.5 Deactivating the Counting Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.0 Span Calibration........................................................................................................................ 14
4.0 Function Parameters.................................................................................................................. 15
4.1 Viewing Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2 Changing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.0 Specifications............................................................................................................................ 19
5.1 RS-232C Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.1.1 Pin Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.1.2 RS-232C Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.1.3 Output Control Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1.4 Interface Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.2 Connecting to a Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.2.1 Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.3 Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Technical training seminars are available through Rice Lake Weighing Systems.
Course descriptions and dates can be viewed at www.rlws.com or obtained by calling
715-234-9171 and asking for the training department.

ii QB Series Operation Manual
6.0 Troubleshooting......................................................................................................................... 25
7.0 Dimensions ................................................................................................................................ 27
QB Series Limited Warranty................................................................................................................... 28

Introduction 1
About This Manual
The QB Series precision balance is an advanced precision weighing instrument incorporating a
highly-sophisticated electronic tuning fork sensor assembly capable of providing quick, reliable, and stable
weight measurement. This manual is intended to give users guidelines and specifications to ensure proper use
and care of the device.
1.0 Introduction
The QB Series balance contains several features to provide optimum performance.
Standard features include:
•Twelve program-selectable units of measure, including: grams (g), kilograms (kg), pounds (lb), carats,
decimal oz, troy ounces, pennyweights, grain, Hong Kong tael, Sin tael, Taiwanese tael, or momme
NOTE: Display shows
"
to indicate unit of measure other than g, kg, or lb.
• Three independent operating modes (straight weighing, piece counting, and over/under checkweighing)
•Virtual immunity from external vibrations
•No warm-up time
•Ultra-fast response time
•Built-in automatic zero tracking
•Die-cast aluminum housing to resist corrosion and EMI
• Liquid crystal display (LCD) – 0.5" (12.5mm)
• Standard 115 VAC adapter (230 VAC adapter optional)
•Automatic shut-off (used with battery operation only)
• Front panel controls
•Automatic sleep mode (when used with internal rechargeable battery pack only)
• Large weighing platform
Options include:
•Glass breeze break (for nominal capacities of 620g and below)
•RS-232C for interfacing with a printer or other peripheral equipment
• Internal rechargeable battery (operates for 32 hours on one charge)
NOTE: There are many AC adapters available in the marketplace. If you should need to replace the AC adapter provided
with this unit, we recommend that you choose the RLWS AC adapter PN 42566 for 115 VAC or PN 42168 for 230 VAC
use. Use of any other AC adapter can void the warranty.
1.1 Unpacking and Inspection
Each QB Series balance comes with the following components (see Figure 1-1 on page 2).
•AC adapter
•Weighing platform (round or rectangle, model dependent)
•Weighing platform support (size is model dependent)
Be sure all components have come with your QB Series balance.
NOTE: Store the packing material and box in a safe, easily accessible place. Should you ever need to transport the
balance across any substantial distance, using the original packing material is the first step to protecting your
investment.

2 QB Series Operation Manual
Figure 1-1. Main Component Parts of the QB Series
1.2 General Care and Maintenance
To keep your QB Series balance operating properly, the device needs to be maintained and cared for. Keep the
housing and platform clean by wiping them off with a soft damp cloth daily. If necessary, use a slight solution of
water and dish soap to clean away stains and dirt. Check under the platform support area for any build up of dirt
and debris that could interfere with the mechanism. Keep your calibration masses in a safe, dry area. Unplug the
AC adapter when the device is not in use. For long term storage, remove the internal battery (if equipped).
1.3 Installation Guidelines
For optimum performance, we recommend that you use your QB Series device in a clean, stable environment.
Avoid the following:
• Excessive drafts
• Significant temperature and/or humidity changes
• Strong magnetic fields exist or equipment that may generate a magnetic field
• Excessive dust
•Unstable or vibrating work surface
•Corrosive gases or large amounts of dust
• Long-term exposure to direct sunlight
•Disassembling or modifying the unit in any way
•Moving the balance when an item is on the weighing platform
•Handling your balance with wet hands
• Shock loading or intentionally overloading the device
• Leaving the device exposed to direct sunlight
•Using any solvents on the device
Level Indicator
Display
Leveling Leg (4)
Expansion Bay
AC Adaptor
Adaptor
Connector
Weighing Platform
(both styles)
Platform Support
OVER
ACCEPT
UNDER
ON
OFF
PFT
RICE LAKE
QB

Introduction 3
1.4 Installation Steps
Use the following steps to properly install the QB Series balance:
1. Inspect the leveling legs and ensure that they are all completely retracted.
2. Place the balance down on a firm, level mounting surface.
3. Using the bubble level to the upper left of the display panel as a guide, adjust the leveling legs as
necessary until the bubble is centered inside the bulls-eye of the bubble level (see Figure 1-2).
Figure 1-2. Level Adjustment
4. Plug the AC adapter into the back of the unit (see Figure 1-3).
Figure 1-3. AC Adapter Connection
5. Secure the weighing pan support onto the device. Tighten the adjusting knob until it is finger tight. Do
not use a screwdriver (see Figure 1-4).
Figure 1-4. Attach Weighing Pan Support
6. Place the platform cover down over the weighing pan support (see Figure 1-1 on page 2 for exploded
view).
7. Plug the AC adapter into a suitable wall outlet.
Leveling leg
BALANCE IS LEVEL
Blue
circle
Bubble
BALANCE IS NOT LEVEL
Adjusting
Knob
RICE LAKE
QB
OVER
ACCEPT
UNDER
ON
OFF
PFT

4 QB Series Operation Manual
1.5 Special Information
The QB Series balance is a sensitive, precision weighing instrument and should always be treated with care.
While every attempt is made prior to shipping to ensure that your balance arrives ready-to-use, uncontrollable
events during the shipping process may make it necessary to calibrate the device before being used.
While not absolutely necessary, we recommend that you perform a span calibration prior to using the balance for
the first time. Even though your QB Series balance was carefully calibrated at the factory, shipping and the
effects of specific gravity can have a negative impact on accuracy. Review Section 3.0 on page 14 for instructions
on this feature.
In the event that the device fails to operate properly, contact your Rice Lake Weighing Systems dealer for
assistance.
1.6 Front Panel
Figure 1-6 shows the QB Series keypad and key functions. Figure 1-7 on page 5 shows the LCD display
segments display.
Figure 1-5. Front Panel Keypad
Figure 1-6. QB Series Display Segments
ON
OFF
P F
Turns scale on or off.
Print key, or data transmission key.
Tare key. In weighing mode, used
to tare weight. In calibration mode,
used to increment/decrement
parameter values.
Function key. In weighing mode, used
to select display unit of measure. In
calibration mode, used to select operational
parameters.
T
OVER
ACCEPT
UNDER
LOW
M
Indicates default weighing mode in grams.
Indicates weighing mode in
lb or oz (dependent on model)
See Table 2-1.
Indicates the battery charge is low.
Indicates a negative
weighing value.
Memory function activated for values used in
limit or sampling functions.
lb
PIndicates count mode.
Limit mode judgement results.
Not used.
Indicates supplemental
unit of measure.

Introduction 5
1.7 Powering Up the QB Series Balance
Press and release the
ON/OFF
key to turn on the QB Series balance.
1. All display segments momentarily illuminate.
2. All display segments momentarily flash.
3. The device activates the default weighing mode and displays the
g symbol in the lower right corner of the
display to indicate that weighments are displayed in grams.
1.8 Powering Down the QB Series Balance
To turn the balance off, press and release the
ON/OFF
key.
M
k
P
lb

6 QB Series Operation Manual
2.0 Weighing Operations
The following section describes weighing operations of the QB Series balance, including: units of measure,
general weighing, weighing with a tare, batching, comparator, and piece counting.
2.1 Units of Measure
Table 2-1 shows the various units of measure (maximum capacity and minimum increment) available on your
QB Series balance.
NOTE: There is no push-button conversion from one unit to another. The QB Series balance is capable of showing only
one unit of measure during a weighing operation. Switching to another unit of measure requires a change in the set up
procedure (see Section 2.2) .
Table 2-1. Unit Capacities
2.2 Changing Units of Measure
After the balance has been powered up (see Section 1.7 on page 5), all display segments momentarily illuminate,
followed by two flashes of all displays. The device then displays default weighing mode. If the balance does not
show a
0.00
value after the normal start sequence, press and release the
T
key. The balance returns to a
0.00
value. The default unit of measure from the factory is
g
(grams). If the balance has already been used, a different
unit of measure may already be activated. To change the active unit of measure, use the following steps:
1. Ensure that there is nothing on the platform and that the weight reading is
0.00
.
2. Press and hold the
F
key until the word
Func
is displayed.
3. Release the
F
key. The display changes to show either
1.SET.1
or
1.SET.2
.
4. Repeatedly press and release the
F
key to change the display, until it reads
7.un.1
(if the active unit of
measure is currently
g
). If the active unit of measure is another value,
7.un.
is displayed, followed by any
one of the following values:
2, 3, 4, 5, 6, 7, 8, 9, A, b,
or
C
.
5. Refer to Table 2-1 above and Table 4-1 on page 15 to determine the setting required for the desired unit
of measure.
6. Repeatedly press and release the
T
key until the appropriate value is displayed.
7. Press and release the
P
key to confirm the setting.
Unit of Measurement
(Display Symbol) QB-150E QB-300E QB-600E QB-620E QB-1500E QB-3000E QB-6000E QB-6200E QB-12KE Conversion
Factor/g
gram
(g) 150 x 0.01 300 x 0.01 600 x 0.02 620 x 0.01 1500 x 0.1 3000 x 0.1 6000 x 0.2 6200 x 0.1 12000 x 11
kilogram
(kg) 0.15 x 0.00001 0.3 x 0.00001 0.6 x 0.00002 0.62 x 0.00001 1.5 x 0.0001 3 x 0.0001 6 x 0.0002 6.2 x 0.0001 12 x 0.001 0.001
carat 750 x
0.05 1500 x 0.05 3000 x 0.1 3100 x 0.05 7500 x 0.5 15000 x 0.5 3000 x 1 31000 x 0.5 60000 x 50.2
ounces 5.2 x
0.0005 10 x 0.0005 21 x 0.0005 21 x 0.0005 52 x 0.005 100 x 0.005 210 x 0.005 210 x 0.005 420 x 0.05 28.349527
pound
(lb) 0.33 x 0.00002 0.66 x 0.00002 1.3 x 0.00005 1.3 x 0.00002 3.3 x 0.0002 6.6 x 0.0002 13 x 0.0005 13 x 0.0002 26 x 0.002 453.5924
troy ounces 4.8 x
0.0005 9.6 x 0.0005 19 x 0.0005 19 x 0.0005 48 x 0.005 96 x 0.005 190 x 0.005 190 x 0.005 380 x 0.05 31.103481
pennyweight 96 x
0.005 190 x 0.005 380 x 0.01 390 x 0.005 960 x 0.05 1900 x 0.05 3800 x 0.1 3900 x 0.05 7700 x 0.5 1.5551740
grain 2300 x
0.2 4600 x 0.2 9200 x 0.5 9500 x 0.2 2300 x 2 46000 x 292000 x 595000 x 2180000x 20 0.0647989
HK tael 4 x .0002 8 x
0.0002 16 x 0.0005 16 x 0.0002 40 x 0.002 80 x 0.002 160 x 0.005 160 x 0.002 320 x 0.02 37.428932
SIN tael 3.9 x
0.0002 7.9 x 0.0002 15 x 0.0005 16 x 0.0002 39 x 0.002 79 x 0.002 150 x 0.005 160 x 0.002 310 x 0.02 37.799466
TW tael 4 x
0.0002 8 x 0.0002 16 x 0.0005 16 x 0.0002 40 x 0.002 80 x 0.002 160 x 0.005 160 x 0.002 320 x 0.02 37.5
momme 40 x
0.002 80 x 0.002 160 x 0.005 160 x 0.002 400 x 0.02 800 x 0.02 1600 x 0.05 1600 x 0.02 3200 x 0.2 3.75

Weighing Operations 7
8. The display returns to a
0.00
value for the appropriate unit of measure.
To change to a different unit of measure, repeat steps 1 – 9 above.
2.3 General Weighing
The following section provides a step-by-step procedure on general weighing using the QB Series balance.
1. Power up the balance (see Section 1.7 on page 5).
2. All display segments momentarily illuminate, followed by two flashes of all displays. The device then
displays default weighing mode. To change the default unit of measure, please refer to Section 2.2 on
page 6. If the balance does not show a
0.00
value after the normal start sequence, press and release the
T
key. The device returns to a
0.00
value.
3. Gently place the item to be weighed on the platform. The unit of measure indicator begins to flash
indicating the balance is registering the weight of the commodity. The value display begins to update.
When the unit of measure indicator ceases flashing, the device is stable and you can read the weight
value.
2.4 Weighing with a Tare
The following section provides a step-by-step procedure on weighing with a tare using the QB Series balance.
NOTE: Whenever the tare function is activated, the effective weighing range of the device is reduced by the value of the
tare. For example, on a QB-600 with a total capacity of 600g, if a tare of 100g is entered into the balance, the total
effective NET weighing range of the device is only 500g (total rated capacity [600g] - tare value [100g] = 500g. Any
attempt to weigh over the effective weighing range results in a “o-Err” error message.
1. Power up the balance (see Section 1.7 on page 5).
2. The balance displays default weighing mode. If the balance does not show a
0.0
value after the normal
start sequence, press and release the
T
key.
3. The default unit of measure is displayed. To change the unit of measure, see Section 2.2.
4. Gently place the empty container on the platform. The unit of measure indicator begins to flash,
indicating that the balance is registering the weight of the commodity. The value display begins to
update. When the unit of measure indicator ceases flashing, the balance is stable and you can read the
weight value.
5. Press the
T
key. The zero display (
0.00
) appears.
NOTE: The value of the original tare must be
≥ +/- 4 displayed divisions from zero. If the original tare
value is
≤ +/- 3 divisions from zero, the device automatically re-establishes a new zero setting before the
T button can be activated. The tare function is not available. To disable this “auto-zero” feature, please
refer to Section 4.0 on page 15.
6. Gently place the product to be weighed in the previously tared container. The unit of measure indicator
begins to flash indicating that the balance is registering the weight of the commodity. The displayed
value begins to update. Continue adding commodity until the display indicates the desired weight value.
When the unit of measure indicator ceases flashing, the device is stable and you can read the weight
value.
NOTE: To view the gross weight of the commodity and the tare, remove the container with its contents
from the weighing platform. The total weight is displayed as a negative number. To return to normal
weighing, replace the container with its contents on the platform.
7. To weigh another commodity and tare or to re-use the current tare and weigh additional samples, remove
the commodity and container from the platform and press the T key to have the display return to a 0.00
reading, then repeat steps 1– 6.
2.5 Batching
The following section provides a step-by-step procedure on using the batching feature of the QB Series balance.
NOTE: Whenever the tare function is activated on a QB balance, the effective weighing range of the device is reduced by
the value of the tare. For example, on a QB-600 with a total capacity of 600g, if a tare of 100g is entered into the balance,
the total effective NET weighing range of the balance is only 500g (total rated capacity [600g] - tare value [100g] = 500g).
Any attempt to weigh over the effective weighing range results in a “o-Err” error message.
1. Power up the balance (see Section 1.7 on page 5).

8 QB Series Operation Manual
2. The balance displays default weighing mode. If the balance does not show a
0.0
value after the normal
start sequence, press and release the
T
key.
3. The default unit of measure is displayed. To change the unit of measure, see Section 2.2.
4. Gently place the empty container on the platform. The unit of measure indicator begins to flash
indicating the device is registering the weight of the commodity. The value display begins to update.
When the unit of measure indicator ceases flashing, the balance is stable and you can read the weight
value.
5. Press the
T
key. The zero display (0.00) appears.
NOTE: The tare value must be ≥± 4 display divisions from zero. If the tare value is ≤± 3 divisions from
zero, the device automatically re-establishes a new zero setting before the T button can be activated.
The tare function is not available. To disable this auto-zero feature, please refer to Section 4.0 on
page 15.
6. Gently place the commodity to be weighed in the previously tared container.
7. The unit of measure indicator begins to flash indicating the device is registering the weight of the
commodity.
8. The value display begins to update.
9. Continue adding commodity until the display indicates the desired weight value.
10. When the unit of measure indicator ceases flashing, the device is stable and you can read the weight
value.
11. Without removing the product, press the T key.
12. Gently add the next product quantity. Only the net weight of the new commodity is displayed.
13. Repeat steps 11 and 12 as necessary.
NOTE: To view the gross weight of the commodity and the tare, remove the container with its contents
from the weighing platform. The total weight is displayed as a negative number. To return to normal
weighing, replace the container with its contents on the platform.
2.6 Removing the Tare
Use the following steps to remove a tare value from the QB balance:
1. Remove the container (empty or full) from the weighing platform.
2. The display shows the weight of the container and the commodity, if any, as a negative value.
3. Press and release the Tkey.
4. The display returns to a 0.0 value.
2.7 Weighing with the Comparator Function
The QB Series balance is equipped with an onboard comparator function that determines how the weight of a
commodity relates to a pre-determined over/under zone. This feature can help alleviate weighing errors and
speed up the judgement-making process. Rather than reading a weight value and making a mental calculation as
to whether or not the value is acceptable, the operator can simply concentrate on the OVER, UNDER and ACCEPT
indicators to determine whether a weight value is acceptable or not. The comparator function is not available in
the counting mode.
NOTE: When the counting mode is activated, the comparator function is automatically deactivated. Should you desire to
return to the comparator function, all of the most recently entered parameters are automatically recalled when the
counting function is deactivated (see Section 2.9 on page 12).
2.7.1 Comparator Function Activation
Prior to using the comparator function, the parameters for the operation must be programmed into the device.
Use the following steps to program the parameters for the comparator function.
1. Power up the balance (see Section 1.7 on page 5).
2. The balance displays default weighing mode. If the balance does not show a 0.0 value after the normal
start sequence, press and release the Tkey.
3. The default unit of measure is displayed. To change the unit of measure, see Section 2.2.
4. Press and hold the Fkey until the word Func is displayed.

Weighing Operations 9
5. Release the Fkey. The display changes to show either 1.SET.1 or 1.SET.2. If the display shows 1.SET.1,
continue with step 6 below. If the display shows 1.SET.2, press and release the Tkey once to change the
value to 1.SET.1, then continue with step 6 below.
6. Press and release the Fkey once. The display changes to read 2.SEL.1. This indicates that the comparator
function is currently inactive.
7. Press and release the Tkey once. The display changes to read 2.SEL.2. This indicates that the comparator
function is active.
8. Press and release the Fkey once. The display changes to read 21.Co.X, where “X” is a value of either 1 or
2. Continue with Section 2.7.2 to establish the basic parameter configuration of the comparator function.
2.7.2 Basic Over/Under Parameter Selection
1. With the display reading 21.Co.X, where “X” is a value of either 1or 2, (see step 8, Section 2.7.1 above),
determine if you wish to have the comparator function with only a stable weight reading (recommended)
or for all weight readings. If you wish to have a comparison done for only stable weight readings press
and release the Tkey until the display reads 21.Co.2. If you wish to have a comparison done for all
weight readings, press and release the Tkey until the display reads 21.Co.1.
2. Press and release the Fkey once. The display changes to read 22.Li.X where “X” is a value of either 0or 1.
3. Determine if you wish to have a comparison performed for the entire weighing range of the balance, or if
you wish to exclude comparisons for values close to zero and for negative values (recommended). If you
wish to have comparisons performed for the entire weighing range of the balance, press and release the T
key until the display reads 22.Li.1. If you wish to have comparisons excluded for values close to zero and
for negative weight values (recommended), press and release the Tkey until the display reads 22.Li.0.
4. Press and release the Fkey once. The display changes to read 23.bu.X, where “X” is a value of either 0,
1, 2, 3, 4, 5, or 6.
5. Determine which of the following visual indications you would prefer for the various over/under/accept
conditions.
6. Press and release the Tkey repeatedly until the appropriate parameter value from Table 2-2 is selected.
7. Press and release the Pkey once. The display returns to a 0.00 reading and the arrows next to the display
legends OVER, UNDER, and ACCEPT flash continuously indicating that upper and lower limits need to be
established. Continue with Section 2.8.3 on page 11.
NOTE: If the OVER, UNDER and ACCEPT arrows are not flashing, one of two conditions exist. Either the
comparator function has not been turned on correctly, or there are UPPER and LOWER comparison
limits already programmed into the unit. Verify that the comparator function is properly activated (see
Section 2.7.1 on page 8), then continue with Section 2.8 below.
2.8 Setting the Upper and Lower Comparison Limits
There are two methods for establishing the upper and lower comparison limits – the reference sample method
and the digital reference method. Section 2.8.2 on page 10 discusses the reference sample method where samples
of commodity that exactly represent the upper and lower limits are weighed and memorized by the balance.
Section 2.8.2 on page 10 discusses the digital reference method where the upper and lower limits are known
values and can therefore be digitally keyed into the balance.
Parameter Value Indication
23.bu.0 Solid arrow next to appropriate display legend
23.bu.1 Flashing arrow next to UNDER display legend. Solid arrow next to ACCEPT and OVER display legends
23.bu.2 Flashing arrow next to ACCEPT display legend. Solid arrow next to UNDER and OVER display legends
23.bu.3 Flashing arrow next to OVER display legend. Solid arrow next to UNDER and ACCEPT display legends
23.bu.4 Flashing arrow next to UNDER and ACCEPT display legends. Solid arrow next to OVER display legend
23.bu.5 Flashing arrow next to ACCEPT and OVER display legends. Solid arrow next to UNDER display legend
23.bu.6 Flashing arrow next to ACCEPT, UNDER, and OVER display legends
Table 2-2. Over/Under Parameter Values

10 QB Series Operation Manual
2.8.1 Reference Sample Method
Use the following steps to establish upper and lower comparison limits in the QB Series balance using the
reference sample method.
1. Press and hold the Pkey until the display reads L Set, then release the Pkey.
2. The following indicators flash simultaneously – unit of measure, 0.00 weight value or the previously
entered lower limit value, under arrow, and M.
3. Place a commodity on the weighing platform that represents the minimum acceptable weight value.
4. Press and release the Fkey once.
5. The display continues to flash showing the unit of measure, minimum acceptable weight value, under
arrow, and M (see Figure 1-7 on page 5). Write down these values for future reference.
6. Press and release the Pkey once.
7. The display momentarily indicates H Set.
8. The following indicators then flash simultaneously: unit of measure, 0.00 weight value, over arrow (#)
and M (see Figure 1-7 on page 5).
9. Place a commodity on the weighing platform that represents the maximum acceptable weight value.
10. Press and release the Fkey once.
11. The display momentarily blanks, followed by a flashing display showing the unit of measure, maximum
acceptable weight value, over arrow and M (see Figure 1-7 on page 5). Write down this value for future
reference.
12. Press and release the Pkey once. The OVER indicator flashes and the weight display shows the value
used in step 9.
13. Remove the sample from the weighing platform. The display returns to a 0.00 value and the over arrow
(#) disappears.
2.8.2 Digital Reference Method
Use the following steps to establish upper and lower comparison limits in the QB Series balance using the digital
reference method.
1. Ensure that you have followed the instructions in Sections 2.7.1 and 2.7.2 on page 9, then continue
below.
2. Determine and write down the values you need to use as the lower limit and upper limit values.
3. The display shows a 0.00 reading and the arrows next to the display legends OVER, UNDER, and
ACCEPT flash continuously indicating that over and under limits need to be established. Continue with
Section 2.8.3 on page 11.
NOTE: If the OVER, UNDER, and ACCEPT arrows are not flashing one of two conditions exists. Either the
comparator function has not been turned on correctly (see Section 2.7.1 on page 8), or there are OVER
and UNDER comparison limits already programmed into the unit. Verify that the comparator function is
properly activated (see Section 2.7.1 on page 8). Continue with Section 2.8.4 on page 11.
4. Press and hold the Pkey until the display reads L Set, then release the Pkey.
5. The following indicators flash simultaneously: unit of measure, 0.00 weight value or the previously
entered lower limit value, under arrow, and M (see Figure 1-7 on page 5).
6. Press and release the Tkey once. With the exception of the least significant digit, the display stops
flashing, and indicates all zeros, or the last lower limit value entered.
7. Press and release the Tkey once. The flashing digit changes by a value of one.
8. Continue to press and release the Tkey until the flashing digit reads the value you desire.
9. Press and release the Fkey once. The value selected in step 8 above is set. The digit stops flashing and
the next most significant digit begins to flash.
10. Repeat steps 7 – 9 as necessary until the display reads the value you desire as the lower limit value.
11. If you need to change a digit once it has been set, repeatedly press and release the Fkey until the value
you want to change is flashing. Then return to steps 7 – 9.
12. Once the balance reads the correct lower limit value, press and release the Pkey once. The entire display
flashes showing the value you have selected as the lower limit value.
13. Press and release the Pkey again. The display momentarily reads H Set.

Weighing Operations 11
14. The following indicators flash simultaneously: unit of measure, 0.00 weight value or the previously
entered upper limit value, over arrow (#), and M (see Figure 1-7 on page 5).
15. Press and release the Tkey once. With the exception of the least significant digit, the display stops
flashing, and indicates all zeros, or the last upper limit value entered.
16. Press and release the Tkey once. The flashing display changes by a value of one.
17. Continue to press and release the Tkey until the flashing display reads the value you desire.
18. Press and release the Fkey once. The value selected in step 17 above is set. The display stops flashing
and the next most significant digit begins to flash.
19. Repeat steps 17 and 18 as necessary until the display reads the value you desire as the upper limit value.
20. If you need to change a digit once it has been set, repeatedly press and release the Fkey until the value
you want to change is flashing. Then return to steps 17 and 18.
21. Once the balance reads the correct upper limit value, press and release the Pkey once. The entire display
flashes showing the value you have selected as the lower limit value.
22. Press and release the Pkey again. The display returns to the weighing mode showing a 0.00 value.
2.8.3 Weighing with the Comparator Function
Once the comparator function has been activated (see Section 2.7.1 on page 8) and upper and lower limit values
have been set (see Section 2.8 on page 9), use with the following steps to weigh with the comparator function:
1. Place a commodity on the weighing platform that is exactly equal to the lower limit value. The ACCEPT
indicator should illuminate confirming that any sample ≥the lower limit value is acceptable. If not,
return to Section 2.8.1 or 2.8.2 on page 10 to re-enter the lower limit value.
2. Place a commodity on the weighing platform that is exactly equal to the upper limit value. The ACCEPT
indicator should illuminate confirming that any sample ≤the upper limit value is acceptable. If not,
return to Section 2.8.1 or 2.8.2 on page 10 to re-enter the upper limit value.
3. Once the lower and upper limits are functioning correctly, any sample that is ≤the upper limit value and
≥the lower limit value is acceptable.
4. Remove the test sample from the platform.
5. If the balance does not show a 0.00 value, press and release the Tkey. The balance returns to a 0.00
value.
6. If applicable, place an empty container on the platform and press the Tkey. The balance returns to a 0.00
reading (see Section 2.4 on page 7)
7. Gently place the item to be weighed on the platform. The unit of measure indicator begins to flash
indicating the balance is registering the weight of the commodity. The displayed value begins to update.
When the unit of measure indicator ceases flashing, the balance is stable and displays the weight value
along with the appropriate OVER, UNDER or ACCEPT indicator illuminated.
2.8.4 Deactivating the Comparator Function
Use the following steps to deactivate the comparator function in the QB Series balance.
1. Press and hold the Fkey until the word Func is displayed.
2. Release the Fkey. The display changes to show 1.SET.1.
3. Press and release the Fkey once. The display changes to read 2.SEL.2. This indicates that the comparator
function is currently active.
4. Press and release the Tkey once. The display changes to read 2.SEL.1. This indicates that the comparator
function is inactive.Any existing over/under parameters remain in memory, but are inactive.
5. Press and hold the Fkey for approximately four seconds. The display returns the conventional weighing
mode and the comparator function is inoperative.

12 QB Series Operation Manual
2.9 Operating the Counting Function
The QB Series balance is capable of functioning as a counting device, enabling it to determine quantity as
opposed to weight. In order to perform this function, the balance must be programmed with the average piece
weight of the sample being evaluated. Once programmed, the balance performs the following calculation to
determine the total number of pieces to display:
Weight on platform - tare weight (if applicable) / average piece weight = displayed piece count
NOTE: When the counting mode is activated, the comparator function is automatically deactivated. Should you desire to
return to the comparator function, all of the most recently entered parameters are automatically recalled when the
counting function is deactivated. If you need to return to the counting mode at a later time, the last average piece weight
utilized is still active.
2.9.1 Counting Function Activation
Prior to using the counting function, the parameters for the operation must be programmed into the balance.
1. Power up the balance (see Section 1.7 on page 5).
2. The balance displays the default weighing mode. If the balance does not show a 0.00 value after the
normal start sequence, press and release the Tkey.
3. Press and hold the Fkey until the word Func is displayed.
4. Release the Fkey. The display changes to show either 1.SET.1 or 1.SET.2. If the display shows 1.SET.2,
continue below with step 5. If the display shows 1.SET.1, press the Tkey once to change the value to
1.SET.2 and then continue with step 5 below.
5. Press and release the Pkey once. The display advances to the weighing mode with a 0value and the P
(counting pieces) indicator illuminated.
2.9.2 Programming the Average Piece Weight
To program the average piece weight, use the steps outlined below.
NOTE: The QB series balance can determine the average piece weight by evaluating initial samples of 10, 30, 50, or 100
pieces. We strongly recommend that you always use a sample of 100 pieces to ensure the most uniform sample piece
calculation resulting in the most accurate counting operation possible based on the samples provided. It is important to
remember that an accurate counting function relies on a uniformity of parts being counted. If there is a large variance
from piece to piece, that error is introduced into the counting function with a resultant error in the value displayed by the
balance.
1. Press and release the Tkey once to ensure that the value on the display is 0.
2. If you desire to use a container to hold the parts to be counted, place the empty container on the weighing
platform.
3. The display may change to indicate a counting value. Press and release the Tkey to return the display to
a 0value.
NOTES:
•The tare value must be ≥+/- 4 display divisions from zero. If the tare value is ≤+/- 3 divisions from
zero, the balance automatically re-establishes a new zero setting before the T button can be
activated. The tare function is not available. To disable this “auto-zero” feature, please refer to
Section 4.0 on page 15.
•Whenever the tare function is activated on a QB balance, the effective weighing range of the device
is reduced by the value of the tare. For example, on a QB-600 with a total capacity of 600g, if a tare
of 100g is entered into the device, the total effective NET weighing range of the balance is only 500g
(total rated capacity [600g] - tare value [100g] = 500g. Any attempt to weigh over the effective
weighing range results in a “o-Err” error message.
4. Press and hold the Fkey until the display reads U Set. Then release the Fkey.
5. The display shows on xxx where “xxx” is either 10, 30, 50, or 100 depending on what value was last used
to determine an average piece weight.
6. Repeatedly press and release the Tkey until the display reads on 100 (recommended) or the quantity you
desire to use as a sample.
7. With the display flashing the number of pieces you have chosen to use as a sample, place those items on
the weighing platform or in the empty container.
8. Press and release the Fkey once. The display momentarily blanks, except for the flashing Mindicator
which confirms that the balance is memorizing the average piece weight.

Weighing Operations 13
NOTES:
•It is possible to use a sample that is too light for the balance to accurately calculate an average
piece weight. If you notice that the display momentarily shows ADD followed by a display that
includes an illuminated UNDER annunciator, you have attempted to use a sample that is too light for
the device to accurately calculate an average piece weight. Continue adding additional samples and
pressing the F key until the UNDER annunciator goes out or simply return to step 4 and utilize a
larger sample.You can abort a sample evaluation at any time by pressing and releasing the P key
once. The display momentarily displays STOP followed by a counting value display.
•The minimum average piece weight must be ≥the minimum increment (readability) of the balance
being used. If you notice that the display momentarily shows L-Err, the commodity in question can
not be counted with this balance.
9. The display then resumes flashing. To begin counting based on the current average piece weight
calculation, press and release the Pkey once. The display stops flashing and the Mindicator disappears.
The balance shows the current quantity of the commodity on the weighing platform. Proceed to
Section 2.9.4 on page 13.
10. To utilize the QB’s exclusive APWR (Automatic Piece Weight Refinement) program, continue with
Section 2.9.3 on page 13 (recommended).
2.9.3 Using the APWR (Automatic Piece Weight Refinement) Program
The APWR program is an exclusive feature of the QB Series. When utilized, its unique capabilities refine the
average piece weight as often as desired to take into consideration the largest sample possible. As the average
piece weight of a commodity is refined, the overall counting results are dramatically improved. Within the net
weighing range of the balance, there is no limit as to how many samples are used.
1. Complete steps 1 – 8 in Section 2.9.2 on page 12.
2. With the display flashing the sample count, Mindicator and Pindicator, add any number of additional
samples to those already being weighed.
3. Press and release the Fkey once. The display momentarily blanks, except for the flashing Mindicator
which confirms that the balance is calculating and updating the previously memorized average piece
weight. Repeat steps 2 and 3 as many times as desired.
4. When you are ready to exit the APWR, press and release the Pkey once. The display stops flashing the
the Mindicator disappears.
2.9.4 Using the Counting Mode
Use the following steps to perform piece count operations on the QB Series balance.
1. Complete the steps in Section 2.9.1 – 2.9.3 as appropriate.
2. Remove the test sample from the platform.
3. If the balance does not show a 0value, press and release the Tkey. The balance returns to a 0value.
4. If applicable, place an empty container on the platform and press the Tkey. The balance returns to a 0
reading (see Section 2.4 on page 7).
5. Gently place the items to be counted on the weighing platform or in the empty container as appropriate.
6. The Pannunciator begins to flash as the display updates. When the Pannunciator stops flashing, you can
read the quantity of commodity being evaluated.
2.9.5 Deactivating the Counting Mode
Use the following steps to deactivate the count mode of the QB Series balance.
1. Press and hold the Fkey until the word Func is displayed (U SET appears first, followed by Func).
2. Release the Fkey. The display changes to show 1.SET.2.
3. Press and release the Tkey once to change the value to 1.SET.1. This deactivates the counting mode.
4. Press and release the Pkey once. The display advances to the weighing mode with a 0.00 value.
5. Even though the counting mode has been deactivated, the most recently used average piece weight
remains in memory and is recalled when the counting mode is reactivated.

14 QB Series Operation Manual
3.0 Span Calibration
To achieve optimum accuracy from your QB Series balance, it should be calibrated on a regular basis in the
environment in which it is normally used. If the device is moved to another physical environment, recalibrate the
device before using it. A few extra moments invested with this section will ensure virtually error-free
performance of the device.
After properly performing the installation guidelines (see Section 1.3 on page 2 and Section 1.4 on page 3),
follow these calibration steps.
1. Power up the balance (Section 1.7 on page 5).
2. Have ASTM Class 4 test weights available equal to 100% of the nominal capacity (in grams) of the
device. (Weights and weight sets are available from Rice Lake Weighing Systems.)
3. Ensure that there is no load on the platform.
4. Ensure that the device is level and on a stable surface, free from environmental changes. Pay special
attention to possible and sudden changes in humidity, temperature and moving air.
5. Ensure that the balance displays a 0or 0.00 value. If not, press and release the Tkey once.
6. If the device is currently using any unit of measure other than grams, activate the grams unit of measure
(Section 2.2 on page 6).
7. If the device is currently in the counting mode, reactivate the conventional weighing mode (see
Section 2.9.5 on page 13).
8. Press and hold the Fkey until the word CAL appears. As you press and hold the Fkey for approximately
two seconds, the word FUNC appears. The word CAL appears after two additional seconds.
9. When the word CAL appears, release the Fkey. If you hold the Fkey down too long, the unit returns to
the default weighing mode. If this occurs, start over at step 8.
10. While pressing and holding the Tkey, press and hold the Fkey. Release both keys at the same time. The
display shows unit 1 where 1represents the function code for the grams unit of measure as active.
11. Press and release the Fkey.
12. The device momentarily displays a flashing on 0, indicating an automatic calibration of true mechanical
zero.
13. After zero calibration, the device automatically advances to read on F.S.
14. Place a load equal to the nominal capacity of the device on the center of the platform.
15. The on FS display flashes, indicating that the device is electronically calibrating a full scale load
equivalent to the nominal capacity of the device.
16. When calibration is complete, the device automatically displays the calibrated nominal capacity of the
balance.
17. Remove the test load from the balance.
18. The device automatically returns to a 0.0 value and the default weighing mode.
In some rare cases, automatic calibration may not be possible. In the event of an error message during
calibration, please refer to the table below for the appropriate corrective action.
Error Message Problem Solution
O-ERR • Calibration load is in excess of the nominal capacity of the
device. The device is out of calibration and is sensing a
100% load being greater than the nominal capacity of the
device.
•The calibration test load is > 100% of the nominal
capacity.
•Change the test load so that it is
equal to 1/2 or 3/4 the nominal
capacity of the device. Then run a
second calibration at 100% nominal
capacity.
•Reduce the test load so that it is
equal to 100% of the nominal
capacity of the device.
1-ERR Calibration load is less than 1/2 of the nominal capacity of the
device. Increase the test load so that it is equal to the nominal capacity of the device.
2-ERR Data error is in excess of 1% of the rated capacity. Contact your RLWS dealer.
Table 3-1. Possible Calibration Process Error Messages

Function Parameters 15
4.0 Function Parameters
The parameter menu allows you to activate or deactivate certain features and functions of the QB Series balance.
The following section provides information on the functions of the QB and how to view and change those
functions. Table 4-1 below describes the various functions of the QB.
NOTE: Bold type indicates factory setting.
Display Setting Function Description
1.SET
1Mode Selection Weighing mode only
2 Counting mode only
2.SEL 1Comparator
Function Comparator OFF
2 Comparator ON
21.CO 1Conditional
Response
Parameter
(availableonlywhen
comparator is set
to ON)
Active when balance is stable and in motion
2 Active when balance is stable ONLY (recommended)
22.LI 0Range Response
Parameter
(availableonlywhen
comparator is set
to ON)
Inactive for data near zero and for negative data (recommended)
1 Active for the entire weighing range (all data)
23BU 0Response
Condition (available
only when the
comparator is set
to ON)
Solid arrow next to appropriate display legend
1 Flashing arrow next to UNDER display legend.
Solid arrow next to ACCEPT and OVER display legends.
2 Flashing arrow next to ACCEPT display legend.
Solid arrow next to UNDER and OVER display legends.
3 Flashing arrow next to OVER display legend.
Solid arrow next to UNDER and ACCEPT display legends
4 Flashing arrow next to UNDER and ACCEPT display legends.
Solid arrow next to OVER display legend.
5 Flashing arrow next to ACCEPT and OVER display legends.
Solid arrow next to UNDER display legend.
6 Flashing arrow next to ACCEPT, UNDER, and OVER display legends.
3.AO 0 Auto Zero Auto zero function off
1 Auto zero function on (± 3d)
4.AP 0 Sleep Mode Sleep mode ON (available only when internal rechargeable battery installed).
Turns device off after three minutes of inactivity when running off of battery power.
1 Sleep mode OFF
5.rE1 Response Speed Very fast (extremely stable environment)
2 Fast (stable environment)
3Average (typical environment)
4 Slow (difficult environment)
5Very slow (unstable working environment)
6.IF 0Baud rate (available
only when optional
RS-232 is installed).
Interface off or not installed
1 Continuous serial output (6-digit)
2 Continuous serial output (7-digit)
Table 4-1. Function List

16 QB Series Operation Manual
61.0.C 0Output control
(availableonlywhen
interface option is
set to ON)
Output prohibited (stop)
1 Continuous output
NOTE: When the RS-232C interface is installed, output interval of data in
constant transmission is 0.1 – 1 second, depending on the weighing condition
and response parameters of 5.rE.X above.
2 Continuous output when data is stable. No output when data is unstable.
NOTE: When RS-232C interface installed, output interval of data in constant
transmission is 0.1 – 1 second, depending on the weighing condition and
response parameters of 5.rE.X above.
3 Data output x 1 each time Pkey is pressed and released in weighing mode
4 Automatic output x 1 after data stablized
NOTE: Only one transmission is sent after a stabilization from an increasing load.
No additional output will be generated until the device returns to a 0.00 value and
resets for the next load.
5 Automatic output x 1 of stable data; output prohibited if data unstable
6 Automatic output x 1 of stable data; continuous output of unstable data
7 Data output x 1 each time Pkey is pressed and released with data stablized
62.6L 1Baud rate (available
only when interface
option is set to ON)
1200 bps
2 2400 bps
3 4800 bps
63.PA 0Parity bit selection
(avalable only when
interface option is
set to ON)
None Available only when option 6.IF.2 is selected
(parity bit available only in 7-digit format)
1 Odd
2 Even
7.UN 1Unit of measure gram
2 kilogram
3 carat
4 decimal ounce
5 pound
6troy ounce
7 pennyweight
8 grain
9 Hong Kong tael
A Singapore tael
bTaiwanese tael
C momme
Display Setting Function Description
Table 4-1. Function List (Continued)