AND HR-250AZ, HR-251AZ, HR-150AZ, HR-100AZ, HR-250A Instructions Manual
...
Analytical Balance
HR-250AZ / HR-251AZ
HR-150AZ / HR-100AZ
HR-250A / HR-251A
HR-150A / HR-100A
1WMPD40
02375C
© 2013 A&D Company, Limited. All rights reserved.
No part of this publication may be reproduced, transmitted, transcribed, or translated into
any language in any form by any means without the written permission of A&D Company,
Limited.
The contents of this manual and the specifications of the instrument covered by this
manual are subject to change for improvement without notice.
Windows, Word and Excel are the registered trademarks of the Microsoft Corporation.
Contents
Basic Operation
1. Introduction .......................................................................................................................................... 5
1-1. About This Manual .......................................................................................................................... 5
1-2. Features ........................................................................................................................................... 5
1-3. Compliance ...................................................................................................................................... 6
2. Unpacking the Balance ....................................................................................................................... 7
2-1. Unpacking ........................................................................................................................................ 7
2-2. Installing the Balance ...................................................................................................................... 8
3. Precautions .......................................................................................................................................... 9
3-1. Before Use ....................................................................................................................................... 9
3-2. During Use ..................................................................................................................................... 10
3-3. After Use ......................................................................................................................................... 11
3-4. Power Supply ................................................................................................................................. 11
4. Display Symbols and Key Operations ............................................................................................. 12
Adapting To The Environment
5. Weighing Units .................................................................................................................................. 13
5-1. Units ............................................................................................................................................... 13
5-2. Storing Units ................................................................................................................................... 15
6. Weighing ............................................................................................................................................ 16
6-1. Basic Operations (g, mg, ct, mom)............................................................................................... 16
6-2. Smart Range ................................................................................................................................. 18
6-3. Counting Mode (PCS) ................................................................................................................... 19
6-4. Percent Mode (%) ......................................................................................................................... 21
6-5. Statistical Calculation Mode .......................................................................................................... 22
6-6. Statistical Calculation Mode (Example of Use) ............................................................................ 26
7. Response Adjustment....................................................................................................................... 28
8. Calibration (
8-1. Calibration Mode ........................................................................................................................... 29
8-2. Calibration Using the Internal Mass
8-3. Calibration Test Using the Internal
8-4. Correcting the Internal Mass Value 1 (Only for the HR-AZ Series)
8-5. Correcting the Internal Mass Value 2
8-6. Calibration Using an External Weight .......................................................................................... 34
8-7. Calibration Test Using an External Weight .................................................................................. 35
Functions
9. Function Switch and Initialization ..................................................................................................... 36
9-1. Permit or Inhibit .............................................................................................................................. 36
9-2. Initializing the Balance ................................................................................................................... 38
10. Function Table ................................................................................................................................... 39
10-1. Structure and Sequence of the Function Table ........................................................................... 39
10-2. Displays and Keys ......................................................................................................................... 39
10-3. Details of the Function Table ......................................................................................................... 40
10-4. Description of the Class "Environment, Display" ......................................................................... 44
10-5. Description of the Item "Data Output Mode" ............................................................................... 46
10-6. Description of the Item "Data Format".......................................................................................... 47
10-7. Data Format Examples ................................................................................................................. 50
10-8. Description of the Item "Application Function" ............................................................................. 51
10-9. Clock and Calendar Function
Sensitivity Adjustment/Sensitivity Check
(One-Touch Calibration, Only for the HR-AZ Series)
Mass (Only for the HR-AZ Series)
(Only for the HR-AZ Series)
(Only for the HR-AZ Series)
) ........................................................................... 29
............................................ 30
.................................................. 31
................................................. 32
................................................. 33
............................................................. 52
3
10-10. Comparator Function .................................................................................................................... 54
11. ID Number and GLP Report ............................................................................................................. 55
11-1. Setting the ID Number .................................................................................................................. 55
11-2. GLP Report .................................................................................................................................... 56
12. Underhook ......................................................................................................................................... 61
13. Density Measurement (Specific Gravity) ......................................................................................... 62
14. Programmable-Unit ........................................................................................................................... 67
15. Password Function ........................................................................................................................... 68
15-1. Balance Software Versions 1.70 to 1.85 ...................................................................................... 68
15-2. Balance Software Versions 1.860 and Later ............................................................................... 69
15-3. Using the Password Function ...................................................................................................... 70
15-4. Entering the Password Before Weighing ..................................................................................... 71
15-5. Logging Out ................................................................................................................................... 73
15-6. Storing or Changing the Password .............................................................................................. 73
15-7. How to Change the Password ..................................................................................................... 74
15-8. Deleting the Password (U5ER 01 to 10) ......................................................................................... 75
15-9. If the Password Is Lost or Forgotten ............................................................................................ 75
Interface And Communication
16. RS-232C Serial Interface .................................................................................................................. 76
17. Connection to Peripheral Equipment ............................................................................................... 77
17-1. Connection to the AD-8121B Printer ............................................................................................ 77
17-2. Connecting to the AD-8127 Printer .............................................................................................. 78
17-3. Connection to a Computer............................................................................................................ 78
17-4. Using Windows Communication Tools (WinCT) ......................................................................... 79
18. Commands ........................................................................................................................................ 80
18-1. Command List ............................................................................................................................... 80
18-2. Acknowledge Code and Error Codes .......................................................................................... 81
18-3. Settings Related to RS-232C ....................................................................................................... 83
19. Key Lock Function ............................................................................................................................ 84
19-1. Locking All the Keys ...................................................................................................................... 84
19-2. Locking the Specified Keys ........................................................................................................... 84
20. Checking the Balance Software Version ......................................................................................... 85
Maintenance
21.
Maintenance ...................................................................................................................................... 85
22. Troubleshooting ................................................................................................................................. 86
22-1. Checking the Balance Performance and Environment .............................................................. 86
22-2. Error Codes ................................................................................................................................... 87
22-3. Other Display ................................................................................................................................. 88
22-4. Asking for Repair ........................................................................................................................... 88
23. Options and Peripheral Equipments ................................................................................................ 89
24. Specifications ..................................................................................................................................... 92
25. External Dimensions ......................................................................................................................... 94
26. Terms/Index ....................................................................................................................................... 95
26-1. Terms.............................................................................................................................................. 95
26-2. Index ............................................................................................................................................... 96
4
1. Introduction
This manual describes how the HR-AZ / HR-A series balance works and how to get the most out of it
in terms of performance. Read this manual thoroughly before using the balance and keep it at hand
for future reference.
Operation may vary depending on the software version of the balance. To check the software version
of your balance, refer to "20. Checking the Balance Software Version".
1-1. About This Manual
This manual consists of the following five parts:
Basic Operation
Adapting To The Environment
Functions
Interface And Communication
Maintenance
...........................................
.................................
......
......
......................................
Describes precautions on handling the balance, balance
construction and basic balance operation.
Describes response adjustment and calibration.
Describes various functions of the balance.
Describes the interface which transmits data and controls the
balance.
Describes maintenance, error codes, troubleshooting,
specifications and options.
1-2. Features
The HR-AZ series balance is equipped with an internal mass for one-touch calibration.
Casing construction, strong protection against dust and moisture.
Multiple weighing units with most of the common units used around the world.
Standard RS-232C serial interface to communicate with a computer and to output the Good
Laboratory Practice (GLP) / Good Manufacturing Practice (GMP) compliant report.
Since the HR-AZ series balance has a built-in clock function, the measured value can be output to a
printer with the date and time. (Changing the clock setting can be limited to the administrator only.
Refer to "15. Password Function")
You can restrict the balance users or the changes to the balance settings by the password function.
The key lock function disables the balance key operation and enables the balance to be operated only
by commands from external device.
Statistical calculation mode to statistically calculate the weight data, and display or output the sum,
maximum, minimum, range (maximum-minimum), average, standard deviation and coefficient of
variation.
Comparator Indicators, displaying the comparison results.
Hold Function, provided for weighing a moving object such as an animal.
Breeze break, provided for better stability if drafts are present.
Underhook, provided for suspended weighing.
As options, the USB interface (FXi-02), the Ethernet interface (FXi-08) and the built-in battery unit
(FXi-09) are available.
Connecting the USB interface, by cable to a Windows computer, allows transmission of the weight
data to Excel or Word. The Ethernet interface allows connection of the balance to a personal computer
through a LAN. The battery unit allows use of the balance where a power source is not available.
The AD-8920A remote display, that is sold separately, allows reading the weight value in a place
away from the balance.
5
The optional AD-1688 data logger provides easy weighing data management.
The optional AD-1687 weighing environment logger provides easy management of the weighing
data, such as environmental data for the weighing and so on.
1-3. Compliance
Compliance with FCC Rules
Please note that this device generates, uses and can radiate radio frequency energy. This device has
been tested and has been found to comply with the limits of a Class A computing device pursuant to
Subpart J of Part 15 of FCC rules. These rules are designed to provide reasonable protection against
interference when this device is operated in a commercial environment. If this unit is operated in a
residential area, it may cause some interference and under these circumstances the user would be
required to take, at his own expense, whatever measures are necessary to eliminate the interference.
(FCC = Federal Communications Commission in the U.S.A.)
6
2. Unpacking the Balance
2-1. Unpacking
The balance is a precision instrument. Unpack the balance carefully. Keep the packing material to be
used for transporting the balance in the future.
See the illustrations to confirm that everything is included.
Install the large breeze break when drafts are present
Top door
Large breeze break
Antistatic coating
Bubble spirit level
Keys
Display
AC adapter
AX-TB-248
AC adapter ID label
Leveling foot
Weighing pan
Pan support
Breeze break ring
Dust plate
Main unit
Grounding terminal
Main unit cover
AX-FXi-31
(PET resin)
How to install the large breeze break
Follow the numbered sequence.
Pull out the locking handles, and install the
large breeze break on the main unit.
Push in the locking handles.
Confirm that both of the locking handle
hooks are under the dust plate.
How to open the top door
If removing either of the securing screws
(3) on the top door, the top door may be
pivoted on the remaining screw.
AC adapter plug
AC adapter jack
RS-232C serial interface
Main unit rear side
The AC adapter plug is
protected against dust and
may be difficult to insert.
When inserting the plug,
turn the plug while pushing
on it.
7
Notes
Confirm that the AC adapter type is correct for your local voltage and receptacle type.
Do not use the AC adapter provided with the balance for other models or equipment with
which the AC adapter may not be compatible.
If you use the wrong AC adapter, the balance and other equipment may not operate properly.
2-2. Installing the Balance
Install the balance as follows:
1. Place the balance on a solid weighing table. Refer to "3. Precautions" for installing the balance.
2. Assemble the pan support, weighing pan, breeze break ring and breeze break, on the balance as
shown in the illustration on page 7.
3. Adjust the leveling feet to level the balance. Confirm it using the bubble spirit level.
4. Confirm that the AC adapter type is correct for the local voltage and power receptacle type.
5. Connect the AC adapter to the balance. Warm up the balance for at least one hour with nothing on the
weighing pan.
Note
The AC adapter plug is protected against dust and may be difficult to insert. When inserting
the plug, turn the plug while pushing on it.
8
3. Precautions
To get the optimum performance from the balance and acquire accurate weight data, note the
following:
3-1. Before Use
Install the balance in an environment where the temperature and humidity are not excessive. The best
operating temperature is about 20°C / 68°F at about 50% relative humidity.
Install the balance where it is not exposed to direct sunlight and it is not affected by heaters or air
conditioners.
Install the balance where it is free of dust.
Install the balance away from equipment which produces magnetic fields.
Install the balance in a stable place avoiding vibration and shock. Corners of rooms on the first floor
are best, as they are less prone to vibration.
The weighing table should be solid and free from vibration, drafts and as level as possible.
Level the balance by adjusting the leveling feet and confirm it using the bubble spirit level.
Red circle
Bubble
OK NG
Bubble spirit level
Leveling foot
Make sure that the bubble is in the center of the red circle.
UP
DOWN
DOWN
Leveling foot
UP
When the bubble is off to the left :
Turn the leveling foot on the front right in the
clockwise direction.
When the bubble is off to the backward position :
Turn both leveling feet on the front in the
clockwise direction at the same time.
Ensure a stable power source when using the AC adapter.
Plug in the AC adapter and warm up the balance for at least one hour.
Calibrate the balance before use or after having moved it to another location. Refer to "8. Calibration
(
Sensitivity Adjustment/Sensitivity Check
Caution: Do not install the balance where flammable or corrosive gas is present.
)".
When the bubble is off to the right :
Turn the leveling foot on the front left in the
clockwise direction.
When the bubble is off to the forward position:
Turn both leveling feet on the front in the
counterclockwise direction at the same time.
9
3-2. During Use
Discharge static electricity from the material to be weighed
(hereinafter referred to as the sample). When a sample could
have a static charge, the weight data is influenced. Ground
the balance and try the following:
Eliminate static electricity using the optional AD-1683 DC
static eliminator.
Try to keep the ambient humidity above 45%RH.
Use a metal shield case for a charged sample.
Wipe charged plastic samples with a moistened cloth.
This balance uses a strong magnet as part of the balance
assembly, so please use caution when weighing magnetic
materials such as iron. If there is a problem, use the underhook
on the bottom of the balance to suspend the material away
from the influence of the magnet.
Eliminate the temperature difference between a sample and
the environment. When a sample is warmer (cooler) than the
ambient temperature, the sample will be lighter (heavier) than
the true weight. This error is due to a rising (falling) draft
around the sample.
Charged material
Material case
Grounding
Magnetic material
Make each weighing gently and quickly to avoid errors caused by the evaporation of moisture from
the sample or the absorption of moisture by the sample.
Do not drop things upon the weighing pan, or place a sample on the pan that is beyond the balance
weighing capacity. Place a sample in the center of the weighing pan.
Do not use a sharp instrument such as a pencil to press the keys. Use your finger only.
Press the RE-ZERO key before each weighing to eliminate possible errors.
Calibrate the balance periodically so as to eliminate possible errors.
Take into consideration the affect of air buoyancy on a sample when more accuracy is required.
Keep the balance interior free of dust and foreign materials.
The breeze break (The HR-AZ / HR-A series) is provided as a standard accessory. An anti-static
treatment has been applied to the breeze break components, but they may be charged with static
electricity when they are unpacked or when the humidity is low. If the weight value is unstable even
when there are no drafts or the balance has a problem with repeatability, remove the breeze break. Or
wipe the clear plates with a moistened cloth, use the optional AD-1683 DC static eliminator or apply an
anti-static spray.
10
3-3. After Use
Avoid mechanical shock to the balance.
Do not disassemble the balance. Contact the local A&D dealer if the balance needs service or repair.
Do not use organic solvents to clean the balance. Clean the balance with a lint free cloth that is
moistened with warm water and a mild detergent.
The edge of the weighing pan is sharp. Use much care when cleaning the pan.
Avoid dust and water so that the balance weighs correctly. Protect the internal parts from liquid spills
and excessive dust.
The breeze break parts have an antistatic coating. Washing these parts with water, etc., will diminish
the antistatic coating function.
3-4. Power Supply
When the AC adapter is connected, the balance is in the standby mode if the standby indicator is on
(refer to "4. Display Symbols and Key Operations"). This is a normal state and does not harm the
balance. For accurate weighing, allow the balance to reach equilibrium with room temperature, and
then warm up the balance for at least one hour before use.
11
s
r
4. Display Symbols and Key Operations
Key Operations
Key operations affect how the balance behave. The basic key operations are:
"Press and release the key immediately" or "Press the key" ....................................................
= normal key operation during measurement
"Press and hold the key" .............................................................................................................
Display Symbols
Displays the weight data relative to the weighing capacity, in percentage, in
Each key, when pressed or when pressed and held, functions as follows:
the weighing mode (Capacity indicator)
Number of statistical data (Statistical calculation mode)
Displays the setting value in the function mode
Processing indicato
Stabilization indicator
Standby indicator
Processing indicator
Blinking
Response indicator
Comparator indicators
Hold mode indicator
Units
Interval output mode
standby indicator
Weight data
Internal output mode
active indicator
Key When pressed When pressed and held (for 2 seconds)
Turns the display on or off. The standby indicator is displayed when the display is turned off.
The weighing mode is enabled when the display is turned on. When the display is turned on,
the password input (
mode is enabled if the password function is not used. Refer to "15-4. Entering the Password
Before Weighing".
This key is available anytime. Pressing the key during operation will interrupt the operation and
turn the display off.
In the weighing mode, turns the minimum
weighing value on or off.
In the counting or percent mode, enters the
sample storing mode.
Switches the weighing units stored in the function
table. Refer to "5. Weighing Units".
Cancels the operation when performing
settings. With the HR-AZ series, enters the
calibration mode using the internal mass.
(One-touch calibration)
Outputs the weight data to a printer or personal
computer using the RS-232C serial interface,
depending on the function table settings.
Confirms the operation when performing
settings.
) is displayed if the password function is used. The weighing
Enters the function table mode.
Refer to "10. Function Table".
Enters the response adjustment mode.
Enters the calibration mode.
No function at the factory setting
By changing the function table:
Outputs "Title block" and "End block" for
GLP/GMP compliant report. (Refer to "11-2.
GLP Report".)
Sets the display to zero.
12
5. Weighing Units
5-1. Units
With the HR-AZ / HR-A series balance, the following weighing units and weighing modes are
available:
A unit or mode can be selected and stored in the function table as described below.
If a weighing mode (or unit of weight) has been turned off, that mode or unit will be missing in the
sequence. Tael has four varieties, one of which can be selected and installed at the factory.
To select a unit or mode for weighing, press the MODE key.
For details about the units and modes, see the table below:
Percent mode
Counting mode
Programmable-unit (No unit displayed. For details,
refer to "14. Programmable-Unit".)
Name (unit, mode) Display
Gram g g 1 g
Milligram mg mg 0.001g
Counting mode
Percent mode % %
Ounce (Avoir)
Troy Ounce
Metric Carat
Momme
Pennyweight
Grain (UK)
Tael (HK general, Singapore)
Tael (HK jewelry) 37.429 g
Tael (Taiwan) 37.5 g
Tael (China) 31.25 g
Tola (India)
Messghal
Density mode
Programmable-unit (Multi-unit)
Function table
(Storing mode)
Conversion factor
1 g =
28.349523125 g
31.1034768 g
0.2 g
3.75 g
1.55517384 g
0.06479891 g
37.7994 g
11.6638038 g
4.6875 g
13
The tables below indicate the weighing capacity and the minimum display for each unit, depending on
the balance model.
Capacity
Unit
HR-100AZ
HR-100A
HR-150AZ
HR-150A
HR-250AZ
HR-250A
Minimum Display
Gram 102 152 252 0.0001
Ounce (Avoir) 3.59 5.36 8.88 0.00001
Troy Ounce 3.27 4.88 8.10 0.00001
Metric Carat 510 760 1260 0.001
Momme 27.2 40.5 67.2 0.0001
Pennyweight 65.5 97.7 162.0 0.0001
Grain (UK) 1574 2346 3889 0.002
Tael (HK general, Singapore) 2.69 4.02 6.66 0.00001
Tael (HK jewelry) 2.72 4.06 6.73 0.00001
Tael (Taiwan) 2.72 4.05 6.72 0.00001
Tael (China) 3.26 4.86 8.06 0.00001
Tola (India) 8.74 13.0 21.6 0.00001
Messghal 21.7 32.4 53.7 0.0001
HR-251AZ / HR-251A
Unit
Precision Range Standard Range
Capacity Minimum Display Capacity Minimum Display
Gram 62 0.0001 252 0.001
Ounce (Avoir) 2.18 0.00001 8.88 0.0001
Troy Ounce 1.99 0.00001 8.10 0.0001
Metric Carat 310 0.001 1260 0.01
Momme 16.5 0.0001 67.2 0.001
Pennyweight 39.8 0.0001 162.0 0.001
Grain (UK) 956 0.002 3889 0.01
Tael (HK general, Singapore) 1.64 0.00001 6.66 0.0001
Tael (HK jewelry) 1.65 0.00001 6.73 0.0001
Tael (Taiwan) 1.65 0.00001 6.72 0.0001
Tael (China) 1.98 0.00001 8.06 0.0001
Tola (India) 5.31 0.00001 21.6 0.0001
Messghal 13.2 0.0001 53.7 0.001
14
5-2. Storing Units
The units or modes can be selected and stored in the function table. The sequence of displaying the
units or modes can be arranged in the function table so as to fit the frequency of use.
Select a unit or mode and arrange the sequence of display as follows:
1 Press and hold the SAMPLE key until ba5fnc of the function
table is displayed.
2 Press the SAMPLE key several times to display Unit .
3 Press the PRINT key to enter the unit selection mode.
4 Specify a unit or mode in the order to be displayed using the
following keys.
SAMPLE key ........ To sequentially display the units.
RE-ZERO key ....... To specify a unit or mode.
The stabilization indicator appears when the displayed unit or
mode is specified.
5 Press the PRINT key to store the units or modes. The balance
displays end and then displays the next menu item of the
function table.
Select or
Displays the units
sequentially.
Specify
Store
6 Press the CAL key to exit the function table. Then the
balance returns to the weighing mode with the unit specified
first in step 4.
Notes
When the power is turned on, the scale displays the unit specified first in step 4.
In the weighing mode, to select a unit or mode for weighing, press the MODE key.
15
6. Weighing
6-1. Basic Operations (g, mg, ct, mom)
1 Press the MODE key and select a unit.
Select the "g" in this example.
2 Place a container on the weighing pan, if necessary.
Press the RE-ZERO key to cancel the weight (tare). The balance
displays 0.0000 g. (The decimal point position depends on the
balance model.)
3 Place a sample on the pan or in the container.
4 Wait for the stabilization indicator to turn on. Read the value.
While the stabilization indicator is on, pressing the PRINT key will
output the weight value, using the RS-232C serial interface.
* Peripheral equipment, that is sold separately, such as a
printer or a personal computer is required.
5 Remove the sample and container from the pan.
Notes
Press the SAMPLE key to turn on or off the minimum
weighing value.
When the ON:OFF key is pressed with a container placed
on the weighing pan, the balance displays 0.0000 g and
weighing is started.
Weighing pan
Container
Sample
Remove the sample
Display off
Weighing pan
Container
16
Zero Operation, Tare Operation and Weighing Range
When weighing is started
The balance will determine the reference zero point when the ON: OFF key is pressed to enter the
weighing mode.
Depending on the load condition at that time, the balance will automatically judge whether to perform
zero or tare operation. The condition for determining which is used is "Power-on zero range", and
when power on zero range is exceeded, the tare operation is performed.
Re-zero operation
By pressing the RE-ZERO key, the display can be set to zero.
The re-zero operation with the RE-ZERO key will automatically judge whether to perform zero or
tare operation. The condition for determining which is used is "Zero range", and when zero range is
exceeded, the tare operation is performed.
Weighing range
The range that the balance can weigh varies depending on the model.
When the total amount (net weight + tare weight) displayed for each model exceeds the maximum
display, E is displayed to indicate that the weighing range is exceeded.
When exceeded in the negative direction, -E is displayed.
Model
HR-250AZ / HR-250A
HR-251AZ / HR-251A
HR-150AZ / HR-150A Approx. ± 15 g Approx. ± 3 g Approx. -7 g or less
HR-100AZ / HR-100A Approx. ± 10 g Approx. ± 2 g Approx. -5 g or less
Power-on
zero range
Zero range -E display range
Approx. ± 25 g Approx. ± 5 g Approx. -12 g or less
17
6-2. Smart Range
The smart range for the HR-251AZ / HR-251A consists of the standard range and precision range
(high resolution).
Smart range function
The range switches automatically, depending on the value displayed.
Pressing the RE-ZERO key allows weighing in the precision range, regardless of the tare value.
The range can be fixed to the standard range by pressing the SAMPLE key.
Precision Range and Standard Range for the HR-251AZ/HR-251A
Unit Precision range Standard range
Gram 0.0000 g to 62.0009 g 62.001 g to 252.008 g
Milligram 0.0 mg to 620009 mg 62001 mg to 252008 mg
Carat 0.000 ct to 310.005 ct 310.01 ct to 1260.04 ct
Momme 0.0000 mom to 16.5336 mom 16.534 mom to 67.202 mom
Refer to page 13 for other units.
Example
1 Press the RE-ZERO key to use the precision range.
The balance displays zero.
2 Place a container (tare) on the weighing pan.
When the weight value displayed exceeds the
precision range value, the balance will switch to the
standard range.
3 Press the RE-ZERO key.
The balance displays zero and switches to the
precision range.
4 Place a sample in the container.
When the weight value displayed is within the
precision range value, the balance will perform a
weighing, using the precision range.
Weighing pan
Container
Sample
Precision range
Standard range
Precision range
Precision range
18
C
6-3. Counting Mode (PCS)
This is the mode to determine the number of objects in a sample based on the standard sample unit
mass. The unit mass means the mass of one piece of the sample. The smaller the variables in each
sample unit mass are, the more accurate the counting will be. The balance is equipped with the
Automatic Counting Accuracy Improvement (ACAI) function to improve the counting accuracy.
Notes
For counting, use samples with a unit mass of at least ten or more times the minimum
weighing value of the balance.
If the sample unit mass variable is too large, it may cause a counting error.
To improve the counting performance, use the ACAI function frequently or divide the samples
into several groups and count each group.
Selecting the Counting Mode
1 Press the MODE key to select (counting mode).
Storing a Sample Unit Mass
2 Press the SAMPLE key to enter the sample unit mass storing
mode.
Even in the storing mode, pressing the MODE key will switch
to the next mode.
3 To select the number of samples, press the SAMPLE key
several times. It may be set to 10, 25, 50 or 100.
Note
A greater number of samples will yield more accurate
Weighing pan
ontainer
counting result.
4 Place a container on the weighing pan, if necessary.
Press the RE-ZERO key to cancel the weight (tare).
The number specified in step 3 appears.
e.g.: 25 0 is displayed if 25 is selected in step 3.
Samples
25 piecies
5 Place the number of samples specified on the pan.
In this example, 25 pieces.
6 Wait for the stabilization indicator to turn on. Press the
PRINT
balance displays (counting mode) and is set to
key to calculate and store the unit mass. The
Place sample
to be counted
count samples with this unit mass. To improve the
accuracy of the unit mass, go to step 8.
The counting result
Notes
If the balance judges that the mass of the samples is too light and is not adequate to be used
as the unit mass, it displays lo . In that case, store the mass by some quantity.
For example, when the model with the minimum weighing value of 0.0001 g is used and 10
pieces of samples weigh 0.0005 g. Store 100 pieces of samples as 10 and multiply the
weighing result by 10.
If the balance judges that the mass of the samples is too light to aquire accurate weighing, it
displays an error requiring the addition of more samples to the specified number. For example,
150- appears to require 25 more samples. Add 25 samples and press the PRINT key.
When the unit mass is stored correctly, the balance proceeds to the counting mode.
19
For a more accurate counting operation, use samples with a unit mass of at least ten or more
times the minimum weighing value of the balance. For example, when a balance with a
mimimum weighing value of 0.0001 g is used, the recommended sample unit mass is 0.001 g
or more.
The sample unit mass stored, even if the AC adapter is removed, is maintained in non-volatile
memory.
Counting Operation
7 Place the samples to be counted on the pan.
While the stabilization indicator is on, pressing the PRINT key will
output the weight value (number of objects), using the RS-232C
serial interface.
Note
Peripheral equipment, that is sold separately , such as a
printer or a personal computer is required.
Counting Mode Using the ACAI Function
The ACAI is a function that improves the accuracy of the unit mass
automatically by increasing the number of samples and averaging
the unit mass variable to minimize the weighing error, as the
counting process proceeds.
8 If a few more samples are added, the processing indicator turns on. To prevent an error, add three or
more. The processing indicator does not turn on if overloaded. Try to add the same number of
samples as displayed.
Processing indicator
9 The balance re-calculates the unit mass while the processing indicator is blinking. Do not touch the
balance or samples on the pan until the processing indicator turns off.
10 Counting accuracy is improved when the processing indicator turns off.
Each time the above operation is performed, a more accurate unit mass will be obtained. There is no
definite upper limit of ACAI range for the number of samples exceeding 100. Try to add the same
number of samples as displayed.
11 Remove all the samples used in ACAI and proceed with the counting operation using the improved
unit mass.
20
C
s
6-4. Percent Mode (%)
This is the mode to display the weight value in percentage compared to a 100% reference mass and
is used for target weighing or checking the sample variable.
Selecting the Percent Mode
1 Press the MODE key to select % (percent mode).
Storing the 100% Reference Mass
2 Press the SAMPLE key to enter the 100% reference mass
storing mode.
Even in the storing mode, pressing the MODE key will switch to
the next mode.
3 Place a container on the weighing pan, if necessary. Press the
RE-ZERO
100 0 % .
4 Place the sample to be set as the 100% reference mass on the
pan or in the container.
5 Press the PRINT key to store the reference mass. The balance
displays 100.00 % . (The decimal point position depends on the
reference value.)
0.0100 g to 0.0999 g 1 %
0.1000 g to 0.9999 g 0.1 %
1.0000 g or more 0.01 %
Notes
If the balance judges that the mass of the sample is too light
to be used as a reference, it displays lo . Do not use the
sample.
The reference mass stored, even if the AC adapter is
removed, is maintained in non-volatile memory.
key to cancel the weight (tare). The balance displays
100 % mass Minimum display
Weighing pan
ontainer
Sample
100%
Place
to be weighed
ample
6 Remove the sample.
Weighing result compared to
100% reference mass
Reading the Percentage
7 Place a sample to be compared to the reference mass on the pan.
The displayed percentage is based on the 100% reference mass.
While the stabilization indicator is on, pressing the PRINT key will
output the weight value, using the RS-232C serial interface.
Note
Peripheral equipment, that is sold separately , such as a
printer or a personal computer is required.
21
6-5. Statistical Calculation Mode
The statistical calculation mode statistically calculates the weight data, and displays or outputs the
results. To use the statistical calculation mode, set the "Application function (apf)" parameter of
"Application (ap fnc)" in the function table to "2", as described below.
Statistical items available are number of data, sum, maximum, minimum, range (maximum-minimum),
average, standard deviation, coefficient of variation and relative error. What statistical items to output
can be selected from the four modes in the function table.
The wrong data input can be canceled by the key operation, if immediately after the input.
Turning the balance off will delete the statistical data.
The standard deviation, coefficient of variation and relative error are obtained by the equation below:
Standard deviation = where Xi is the i-th weight data, N is number of data.
Coefficient of variation (CV) = x 100 (%)
Relative error of maximum value = x 100 (%)
Relative error of minimum value = x 100 (%)
Note
When data with the minimum weighing value turned off are used in the statistical calculation,
results will be displayed with the minimum weighing value turned off. (The minimum weighing
value will be rounded off.)
6.5.1. Getting Started
N･Σ(Xi)2 - (ΣXi)2
N･(N - 1)
Standard deviation
Average
Maximum value - Average
Average
Maximum value - Average
Average
Switching to the Statistical Function Mode (Changing the Function Table)
1 Press and hold the SAMPLE key until of
the function table is displayed, then release the key.
2 Press the
SAMPLE key several times to display
.
3 Press the
PRINT key to display
4 Press the RE-ZERO key several times to display .
To select statistical items to output, go to step 5.
To store the statistical function mode setting, go to step 7.
To disable the statistical calculation mode, press the
RE-ZERO key to select .
To store the setting To select statistical
go to step 7. go to step 5.
Press and hold
(for 2 seconds)
Press several times
Press several times
22
Selecting the Statistical Items to Output
5 Press the SAMPLE key to display .
6 Press the RE-ZERO key to select the output items.
In the example, is selected to output the number of data, sum,
maximum, minimum, range (maximum-minimum) and average.
Parameter Description
0 Number of data, Sum
1
2
3
Number of data, Sum, Maximum, Minimum,
Range (maximum – minimum), average
Number of data, Sum, Maximum, Minimum,
Range (maximum – minimum), Average, Standard deviation,
Coefficient of variation
Number of data, Sum, Maximum, Minimum,
Range (maximum – minimum), Average, Standard deviation,
Coefficient of variation, Relative error of maximum value,
Relative error of minimum value
7 Press the PRINT key to store the setting.
Note
The statistical calculation mode will be enabled using the ON:OFF key or
when the power is turned on.
8 Press the CAL key to return to the weighing mode.
Selecting the Unit
9 Press the MODE key to select the unit to be used for the statistical calculation
mode. In the example shown at the right, gram (g) is selected.
Notes
Selecting the unit using the MODE key is not available after the data is entered. In this case,
clear the data as described on page 25 and select the unit using the MODE key.
When the unit used for the statistical calculation mode is to be enabled upon power-on,
select the unit in "Unit (Unit)" of the function table beforehand.
6.5.2. Using the Statistical Calculation Mode
Entering Data for Statistical Calculation
Use the following keys to operate the statistical calculation mode.
MODE key
When no data has been entered, selects the unit.
SAMPLE key ..... Turns the minimum weighing value on or off, in the weighing mode.
RE-ZERO key
PRINT key ........ Outputs the data number and the weight data and includes the weight data to
Outputs the statistical results while the statistical results are displayed. (Output is
CAL key
........
...
............
When the data is entered, moves between the displaying items (weighing mode,
statistical results and data operation) each time the key is pressed.
Sets the display to zero in the weighing mode.
statistical calculation in the weighing mode. (Output is not in the data format
specified in the function table because of the data number added.)
not in the data format specified in the function table.)
Returns to the weighing mode.
23
"
"
1 Press the RE-ZERO key to set the display to zero.
2 Place the sample on the weighing pan and wait for the stabilization
indicator to turn on.
3 Press the PRINT key to add the data displayed to statistical
calculation. The number of data on the upper left of the display
increases by 1.
4 Repeat steps 1 to 3 for each weighing.
Outputting the Statistical Results
5 Each time the MODE key is pressed, the display
changes: the results as selected in "Statistical function
mode output items (5taf)", and .
Weighing pan
Sample
6 While the results are displayed, press the PRINT key to
output the results.
Notes
When the number of data is 1, the coefficient of
variation is displayed as - - - - - - - .
When the average is 0, the coefficient of variation
is displayed as - - - - - - - .
Statistical items are indicated on the upper left of
6.5.4. Clearing the
the display using the following symbols.
Symbol Statistical item
5um Sum
6.5.3. Deleting the
1max Maximum
1min Minimum
1r Range (Maximum – minimum)
1ave Average
15d Standard deviation
1Cv Coefficient of variation
Mmax% Relative error of maximum value
Mmin% Relative error of minimum value
Output the results
Statistical Data"
Latest Data"
Output example Function table
Displays the
statistical results
selected in the
function table
parameter
24
6.5.3. Deleting the Latest Data
When the wrong data is entered, it can be deleted and excluded from
statistical calculation. Only the latest data can be deleted.
1 In the weighing mode, press the MODE key several times to
display 1 .
2 Press the PRINT key to display
.
3 Press the RE-ZERO key to display .
4 Press the PRINT key to delete the latest data and exclude it
from statistical calculation.
The number of data decreases by 1 when the balance returns
to the weighing mode.
6.5.4. Clearing the Statistical Data
Press several times
All the statistical data will be deleted and the number of
data will be 0 (zero).
1 In the weighing mode, press the MODE key several
times to display .
2 Press the
PRINT key to display
.
3 Press the RE-ZERO key to display .
4 Press the PRINT key to delete the statistical data.
The number of data becomes 0 (zero) when the
balance returns to the weighing mode.
Press several times
25
(
6-6. Statistical Calculation Mode (Example of Use)
Here, as an example of use of the statistical calculation mode, mixing of the multiple formulae such as
medicine is described. The mixing process is recorded using the balance and the printer.
In the example, the HR-250AZ and the compact printer AD-8121B (dump print mode) are connected
using the RS-232C serial interface.
6.6.1. Getting Started
Changing the Function Table
Changes To enable the statistical calculation mode
To enable "Zero after output"
Enabling the Statistical Calculation Mode
1 Enter the function table menu. Press and hold the SAMPLE key until
of the function table is displayed, then release the key.
2 Select the application function. Press the
times to display . Then, press the PRINT key to
display .
3 Change the application function parameter to "2".
Press the RE-ZERO key to display .
Press the PRINT key to confirm the change. After ,
is displayed.
SAMPLE key several
Enabling "Zero After Output"
4 Select "Zero after output".
Press the SAMPLE key several times to display .
Then, press the PRINT key to display , and press
the SAMPLE key several times to display .
5 Enable "Zero after output".
Press the
the PRINT key to confirm the change.
After , is displayed.
RE-ZERO key to display . Then, press
Returning to the Weighing Mode
6 Press the CAL key to return to the weighing mode.
Press and hold
for 2 seconds)
Press several times
Press several times
Press several times
Return to the weighing mode
26
6.6.2. Using the Statistical Calculation Mode
1 Press the RE-ZERO key to set the display to zero.
2 Place a container on the weighing pan.
Press the PRINT key to cancel the weight
(tare). The balance displays 0.0000 g. (Storing
the tare value)
The tare value data is output when the
peripheral output equipment is connected.
3 Weigh formula 1 and press the PRINT key.
The balance displays 0.0000 g. (Storing the
weight value of formula 1)
The weight value data is output when the
peripheral output equipment is connected.
4 Weigh formula 2 and press the PRINT key.
The balance displays 0.0000 g. (Storing the
weight value of formula 2)
The weight value data is output when the
peripheral output equipment is connected.
5 When there are some more formulae to be
added, repeat step 4.
6 After mixing is complete, press the
MODE key
to display the statistical results.
7 Press the
PRINT key to output the number
of data saved including the tare value and the
total weight.
Output example
Tare value (Container )
Container
Formula 1
Sample 1
Formula 1+2
Sample 2
Number of data
saved including
the tare value
Tot a l v a lu e
Tare value
Formula 1
Formula 2
Total value
27
7. Response Adjustment
This function stabilizes the weight value, reducing the influence on weighing that is caused by drafts
and vibration at the place where the balance is installed.
The function has three stages as follows and can be changed by simple key operation.
Indicator Description
FAST
MID.
SLOW
Operation
1 Press and hold (about 2 seconds) the MODE key until
RESPONSE is displayed. And then, release the key.
2 Press the MODE key to select a rate of the response
adjustment. Either FAST, MID. or SLOW can be selected.
3 After a few seconds of inactivity, or when the PRINT key is
pressed, the balance displays eend . Then, it returns to the
weighing mode and displays the updated response indicator.
The weighing speed update result remains displayed for 30
seconds.
Note
Setting the response rate automatically changes the
"Condition (Cond)" and "Display refresh rate (5pd)"
parameters of "Environment, Display (ba5fnc)" in the
function table, as shown below:
Indicator Cond (Condition) 5pd (Display refresh rate)
FAST 0 1 (Approx. 10 times/second)
MID. 1 0 (Approx. 5 times/second)
SLOW 2 0 (Approx. 5 times/second)
When the balance is to be used with other setting
combinations, set each parameter in the function table.
Fast response, but prone to drafts and vibration.
Good for target weighing.
Slow response, but strong against drafts and vibration
Good for weighing which requires a stable display.
Response indicator
Press and hold
(for 2 seconds)
Release and
press again
Each pressing the key
or after while
28
8. Calibration (
Sensitivity Adjustment/Sensitivity Check
)
8-1. Calibration Mode
Since the balance's resolution is high, weighing values may change due to gravity and daily
environmental changes. It is necessary to perform calibration (sensitivity adjustment) with the weight in
order to keep the weighing values from changing even if gravity or the environment changes.
Calibrate the balance if it is installed for the first time or relocated, or when the weighing values change
significantly in daily inspection.
Calibration means to adjust the weighing value of the balance using the reference weight or internal
mass. Calibration test means to weigh with the reference weight and compare how much the result
deviates from the reference value. (Calibration test does not perform adjustment.)
Calibration (Sensitivity Adjustment)
Calibration using the internal mass ············· Using the internal mass, adjust the balance with a single
touch. (Only for the HR-AZ series)
Calibration using an external weight ············ Using an external weight, adjust the balance.
Calibration Test (Sensitivity Check)
Calibration test using the internal mass ············ Checks the accuracy of weighing using the internal mass
and outputs the result. (Only for the HR-AZ series)
* No adjustment is made.
Calibration test using an external weight ·········· Checks the accuracy of weighing using an external weight
(target weight) and outputs the result.
* No adjustment is made.
Cautions
When calibrating, be sure to install the provided large breeze break.
Do not allow vibration, drafts, or temperature change to affect the balance during calibration.
Besides periodic calibration and before each use, perform calibration when:
The balance is installed for the first time.
The balance has been moved.
The ambient environment has changed.
Do not allow vibration or drafts to affect the balance during calibration.
To output the GLP/GMP compliant report using the RS-232C serial interface, set "GLP output ( info )"
of "Data output ( dout )". For details, refer to "10. Function Table". To display the GLP output, a printer
or personal computer is required.
Calibration test is available only when "GLP output ( info )" of "Data output ( dout )" is set to "1", "2" or
"3".
Caution on Using an External Weight
The accuracy of an external weight will influence the accuracy of weighing. Select an appropriate
weight as listed below:
Model Usable Weight Adjustable Range
HR-250AZ / HR-250A 250 g, 200 g, 100 g, 50 g
HR-251AZ / HR-251A 250 g, 200 g, 100 g, 50 g, 20 g
HR-150AZ / HR-150A 150 g, 100 g, 50 g
HR-100AZ / HR-100A 100 g, 50 g
The calibration weight in bold type: factory setting.
The calibration weight value can be adjusted within the range above.
29
-0.0150 g to +0.0150 g
Display
This indicator means "the balance is measuring data". Do not allow
vibration or drafts to affect the balance while this indicator is displayed.
8-2. Calibration Using the Internal Mass
This function calibrates the balance using the internal mass. The only operation required is to press
the CAL key.
Notes
Level the balance by adjusting the leveling feet and confirm that the bubble is in the center of
the spirit level.
Poor level adjustment may cause a calibration error while using the internal mass.
(One-Touch Calibration, Only for the HR-AZ Series)
Operation
1 Connect the AC adapter and warm up the balance for at least one hour with nothing on the weighing
pan.
2 Place the provided large breeze break on the balance and press the
3 The balance displays Calin and performs calibration using the internal mass. Do not allow
vibration or drafts to affect the balance.
4 The balance displays end after calibration. If the "GLP output (info)" parameter of the function
table is set to "1" or "2", the balance displays glp and outputs "Calibration Report" using the
RS-232C interface or stores the data in memory. For details on the calibration report format, refer to
"11-2. GLP Report".
5 The balance will automatically return to the weighing mode after calibration.
CAL key.
About the Internal Mass
The mass of the internal mass may change due to corrosion or other damage caused by the operating
environment, or due to aging. Check the internal mass periodically. Correct the internal mass value as
necessary. For details, refer to "8-4. Correcting the Internal Mass Value 1 (Only for the
and "8-5. Correcting the Internal Mass Value 2
To maintain the weighing accuracy, perform the internal mass value correction periodically.
(Only for the
HR-AZ
Series)
".
HR-AZ
Series)
"
30
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