Analytical Balance
Model
GR-120
GR-200
GR-300
GR-202
1563-2A-IE.1999.02.08
A&D Company Limifed
A
This is an information mark that informs you about the operation of
the balance.
NOTE This manual and ortheGR series balances may be changed at any
time to improve the product without notice.
This is a hazard alert mark.
Contents
Basic Operation
1. Introduction....................................................................................................... 3
Compliance with FCC Rules
Compliance with EMC Directives
2. Caution.............................................................................................................. 5
Precautions for Installing the Balance
Cautions during use (To get best performance)...................................... 6
Take Care of Your Balance..................................................................... 7
Power Supply............................................................................................... 7
3. Unpacking your balance...................................................................................... 8
Installing your Balance
Display Symbols and Key Operation........................................................... 9
4. Weighing Units.................................................................................................... 11
5. Weighing............................................................................................................. 13
Basic Operation (gram mode)
Counting Mode (pcs)
Percent Mode (%)
................................................................................
.....................................................................................
...................................................................
............................................................
........................................................
................................................................................
..................................................................
4
4
. 5
9
13
14
15
Adapting to the Environment
6. Response Adjustment......................................................................................... 16
Automatic Response Adjustment
Manual Response Adjustment
7. Calibration........................................................................................................... 18
Calibration Group
Automatic Self Calibration......................................................................... 19
Calibration Using the Internal Weight........................................................ 20
Calibration Test Using the Internal Weight
Calibration Using an External Weight........................................................ 22
Calibration Test Using an External Weight
Correcting the Internal Weight Value
......................................................................................
..............................................................
..................................................................
...............................................
.............................................
........................................................
Functions
8. Function Switch and Initialization........................................................................ 28
Permission or Prohibition
Initializing the Balance
9. Function Table.................................................................................................. 30
Display and Keys of the Function Table
Details of the Function Table
Explanation of Item "Environment, Display"............................................ 34
Explanation of Item "Data output mode"
Explanation of Item "Data format" ............................................................ 36
Examples of data format
.........................................................................
..............................................................................
...................................................
..................................................................
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...........................................................................
16
17
18
21
24
26
28
29
31
32
35
38
page 1 Contents
1. Introduction
THANK YOU FOR YOUR A&D PURCHASE
This manual will tell you in simple language how this balance works and how
to get the most out of it in terms of performance.
Chapters of this book
Basic operation
Adapting to the environment... Explanations concerning response adjustment,
........................
Please read this chapter before use. cautions,
basic operation and names are described.
calibration and calibration test.
Functions
Serial interface (RS-232C)
Maintenance
.................................
......
............................
Functions and parameters for the balance.
This interface transmits data and can control the
balance.
Maintenance, error code list, options, terms and
index.
Features
□ Built-in Calibration Weight (internal weight), used to calibrate and verify the
calibration of your balance.
□ Automatic Self Calibration, using the built-in weight, adapting to changes in
temperature.
□ Automatic Response Adjustment, adapting to vibration and drafts in the
environment.
□ Data Memory Function, storing 200 weighing data.
□ Interval Memory Mode, storing weighing data periodically.
□ Good Laboratory Practices (GLP) data output using a serial interface.
□ Under Hook, for measuring specific gravity and magnetic substances.
□ The balance is equipped with the specific gravity measuring mode to
calculate the specific gravity (density) of a solid.
□ Multiple Weighing Units, with most of the common units used around the world.
□ RS-232C serial interface, for transmitting data and controlling your balance.
□ Door Control Lever, a front mounted door control can easily open and close
one of the side doors if connected using the door joint.
Basic operation page 3 1 ■ Introduction
Compliance with FCC Rules
Please note that this equipment generates, uses and can radiate radio
frequency energy. This equipment 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 equipment is operated in a commer
cial environment. If this unit is operated in a residential area it might 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.)
Compliance with EMC Directives
This device features radio interference suppression in compli
C€
ance with valid EC Regulation 89/366/EEC.
Note 1
The displayed value may be adversely affected under extreme
electromagnetic influences.
2 Protect the RS-232C connector from extreme electrostatic dis
charge when peripheral equipment is not connected.
Protect the AC adapter jack from extreme electrostatic discharge
when the AC adapter is not connected.
1. Introduction
Page 4
Basic operation
2. Gaution
Precautions for Installing the Balance
To ensure that you get the most from your balance, please try to follow
these conditions as closely as possible:
□ The best operating temperature is about 20°C
/ 68°F at about 50% Relative Humidity.
□ Try to ensure a stable power source when using
the AC adapter.
□ Please warm-up the balance for at least one
hour. Plug-in the AC adapter as usual.
□ The weighing room should be free of dust.
□ The weighing table should be solid and free
from vibration, drafts (such as frequently open
ing doors or windows) and as level as possible.
□ Keep the balance level by using the bubble spirit
level.
□ Don’t install the balance near heaters or air
conditioners.
□ Don’t install the balance in direct sunlight.
□ Don’t use the balance near other equipment which
produces magnetic fields.
□ Corners of rooms are best as they are less
prone to vibrations.
□ Calibrate the balance before using and after
moving it to another location.
Do not place or use the balance where there
is flammable or corrosive gas present.
Basic operation
page 5
Cautions during use (To get best performance)
Note the following items to get accurate weighing data.
□ Press the | RE-ZERO | key before each weighing to prevent
possible error.
□ Calibrate the balance periodically so as to cancel possible
weighing error.
□ Make each weighing quickly to avoid errors due to changes
in the environmental conditions.
□ Close glass doors to keep out drafts.
□ Do not drop things upon the weighing pan, or place a
weight beyond the range of the balance on the weighing
pan.
□ Do not use a sharp instmment (such as a pencil or ball point
pen) to press the keys, use your finger only.
□ Toweighproperlywithaminimum display of 0.01 mg using
the GR-202, replace the breeze break ring with the fine
range breeze break ring. See page 8 for details.
□ Dischargestaticelectricityfromtheweighed matter. When
weighing material (plastics, insulator, etc.) could have a
static charge, the weight value is influenced. Try to keep
the ambient humidity above 45%RH or to use the metal
shield case.
□ This balance uses a strong magnet as part of the balance
assembly, so please use caution when weighing magnetic
materials. 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.
□ Cancel the temperature difference between the weighed
material and the environment. When a sample is warmer
(cooler) than the ambient temperature, the sample will
lighter (heavier) than tme weight. This error is due to the
rising (falling) draft next the sample.
□ Take into consideration the affect of air buoyancy on a
sample when more accuracy is required.
2. Caution
Page 6
Basic operation
□ Operate your balance gently. Shorten the operation time
as much as possible ( Opening and closing door, placing
and removing material). Use a pairof tweezers (pincette)
to avoid temperature changes due to heat from inserting
your hand into the weighing chamber.
Take Care of Your Balance
□ Don’t disassemble the balance. Contact your local A&D dealer if your
balance needs service or repair.
□ Don’t use solvents to clean the balance. For best cleaning, wipe with a dry lint
free cloth or a lint free cloth that is moistened with warm water and a mild
detergent.
□ When you transport the balance, hold it as shown in
the right illustration. Never lift the balance using the
weighing chamber frame.
□ Keep magnetic substance away from the balance.
□ Avoid mechanical shock to your balance.
□ Avoid dust and water so that the balance weighs
correctly. Protect the internal parts from liquid spills
and excessive dust.
□ Remove and clean the floor plate of the weighing
chamber.
□ Use the special shipping box supplied for transpor
tation.
Power Supply
□ When the AC adapter is connected, the balance is in the standby mode if
the standby indicator is on (see "Display Symbols and Key Operation"). This
is a normal state and does not harm the balance. We recommend that you
plug in your balance for at least an hour before use so it can warm up.
Basic operation
page 7
2. Caution
3. Unpacking your balance
□
Unpack the balance carefully and keep the packing material if you want to
transport the balance again in the future.
□
In the carton you should find this manual plus :
Weighing Pan
Leveling foot
Breeze Break Ring
This “fine range breeze break
ring" is an accessory for the
GR-202. Before weighing on
the fine range, of which the
minimum display is 0.01 mg,
install the this ring in place of
the "breeze break ring" to avoid
errors caused by drafts.
Floor Plate of the
Weighing Chamber
Door Control Lever
A side door can be opened and
closed using the Door Control
Lever, when the Door Joint is
connected to a side door.
Fine Range v
Breeze Break Ring
Bubble Spirit Level
Step Cards
(A step card is attached to the balance)
Response Adjustment
nnnnn I weighing pan, press
t^UQUU» I and hoWIhe O‘ey*"
two seconds.
UUUUUt I weig
Automatic I
The balance adiotnaii
detecting changes in 1
’.^O'uuuua [ ole
bflSfrtC [p'<«''«'VxlKey
dout ~[p'”Slheai«.-Y.
Press the Mod key
Prt
Mi} {i|
Storing Data
PiessrrgiheQ key. the weigrt
value Eslciedmlhe balance.
Keys
if'
Data Memory Function
Setting
^ I Press and he*
two seconds.
__
mtuiiual Q key lor approx,
fECflU [p-gslheQkey
{¿■3SSa
Ihe-*^«-
key to sete cl'f.
Press Ihegkey
and then irre^key
Outputting
___
I Piess and hold It«
two seconds.
Use the loHowng
Piessingthekeylwo
o
o
3. Unpacking your balance
— Grounding Terminal
Page 8
AC Adapter
Please confirm that
the AC adapter type
is correct for your
local voltage and
receptacle type.
-AC Adapter Jack
External Key Jack
'—Serial interface (RS-232C)
Basic operation
Installing your Balance
Step 1 Consider the section "2. Caution" for installing
your balance. Place the balance on a firm weigh
ing table.
Step 2 Assemble the "Dust Plate", "Breeze Break Ring"
and "Weighing Pan" on your balance. There is a
reference illustration on the previous page.
Step 3 Adjust the level of the balance using the leveling
feet. Ground the balance chassis for discharging
static electricity if you have a static problem.
Step 4 Please confirm that the adaptertype is correct for
your local voltage and power receptacle type.
Step 5 Connect the AC adapter to the balance. Warm up
the balance for at least one hour with nothing on
the weighing pan.
OK NG
Bubble Sprirt Level
Leveling Foot
Step 6 Calibrate the balance before use.
(Refer to "7. Calibration")
Display Symbols and Key Oiserafion
Processing
indicator
Stabilization
indicator -
Stand-by _
indicator
^ StIS response iF^lMiPnfSLW] r-
>0
Weighing data
or stored data
iDZtpCS t
jniDnig I
•;CtEHfvi
The amount of stored data
with memory data function
Response indicator
Units
Stand-by indicator of
interval memory function
Data number of
displaying data
Basic operation
Active indicator of
interval memory function
A previous notice indicator of automatic self calibration
page 9
3. Unpacking your balance
There are two operation types for pressing a key. Each key operation
performs a different function.
First type : "Press and release the key immediately" or "Click the key"
Second type ; "Press and hold the key"
The first type is "to press the key", the first type is normal key operation
during measurement.
Caution
Do not press and hold the key, if you do not perform a rewrite of the internal
parameters.
Press the key
(Press and release the key imediately)
Key Press the key
ON:OFR_
(@)
Display ON / OFF key. The stand-by indicator is displayed, when the
balance is turned off with this key. Weighing data is displayed, when the
balance is turned on with this key.
RANGE-^
Minimum figure of weighing data
is changed.
MODE
____
^
Units are changed (selected
from the function table). Refer
to section "4. Weighing Units".
CAL ^
This key performs calibration of
the balance using the internal
(S>
weight.
Press and hold the key
Press and hold the key
The function table menu is displayed.
Refer to section "9. Function table"
Response adjustment is performed.
Other items of the calibration menu
are displayed.
Weighing data is stored in the
balance (Factory setting) or is
output to the RS-232C inter
face. This key functions
Data memory menu or GLP menu is
displayed. This key functions accord
ing to the function table. Factory setting
is "not used".
according to the function table.
RE-ZEBOL The key sets the display to zero. This key returns a weighing value to the
center of zero when the weighing pan is empty, and can also tare (cancel)
the weight of container and/or sample. Please use this key before each
weighing to cancel possible error.
3. Unpacking your balance
Page 10
Basic operation
4. Weighing
The most common unit of weight used around the world is grams, but there
is often a need to shift to an alternative unit specific to the country where
the balance is used or to select modes such as counting or percent.
The unit can be select by the function table. The units are as follows (if some
are missing please refer to your dealer):
[üjQ
Note
Percent mode
Counting mode
Milii-qram
Gram
(Density mode)
m
Messgha[/^
Tola(lndia)
If a mode (or unit) of weight has been turned off, the sequence will be missing
that mode or unit. There are also the various Tael that can be included if
necessary. (Tael is selected as a unit from four units installed at the factory)
If the law in your area permits, you may use all of the units, or at this
software level you can disable the weighing units you don’t regularly
use. Also, some dealers may initially turn OFF units which are not
regularly used, but you may want to turn them back on.
pcs
Tael
Ounce (Avoir)
d*t^
^ ^Pennyweight
\ Grain
Troy Ounce
Hj Metric Carat
a
mnni- Mflmme
Conversion table
Abb rev.
mg
oz Ounce (Avoir)
ozt Troy Ounce
ct Metric Carat
mom
dwt
GN
TL
TL
TL
TL
t
mes
Basic operation
Name Conversion
Milli-gram 0.001 g
28.349523125 g
31.1034768 g
0.2 g
momme
Pennyweight 1.55517384 g
Grain (UK)
Tael (HK general. Sing.) 37.7994 g
Tael (HK, jewelry)
Tael (Taiwan)
Tael (China)
Tola (India)
Messghal
3.75 g
0.06479891 g
37.429 g
37.5 g
31.25g
11.6638038 g
4.6875 g
page 11
4, Weighing Units
Operation of unit selection
The unit can be selected in the function table. The sequence of displaying
the unit can be arranged so as to fit the frequency of use in the function
table. According to the sequence of displaying unit, the units can be
changed with the [MODE key at the weighing mode.
Selecting a unit and arranging the sequence of display
Step 1 Press and hold the RANGE key to display
/ iirr-
Lf ‘ I J I n L
of the function table.
Step 2 Press the [RANGE key several times to display \Un it
Step 3 Press the [PRINT key to enter into unit selection.
Step 4 The unit can be selected using the following keys.
The unit display sequence is in the order of pressing the | RE-ZERO key.
MODE I key The key to sequentially display the units.
RE-ZERO I key The key to select a unit. The jO | indicator is
displayed at unit selected.
Step 5 Press the PRINT key to store the units. Then the balance displays next
menu id of the function table.
Step 6 Press the |CAL| key to exit the function table. Then the balance returns
to the weighing mode.
4. Weighing Units
Page 12
Basic operation
5. Wéighing
Cautions for the weighing operation
□ Operate your balance gently.
□ Press the RE-ZERO key to prevent possible error before placing material
on the pan (weighing material) each time.
□ Shorten the operation time as much as possible. ( Opening and closing
door, placing and removing material)
□ Temperature changes during measurement may cause weighing error.
□ Use a pair of tweezers (pincette) to avoid a temperature change that Is due
to having your hand in the weighing chamber.
□ Calibrate your balance periodically to maintain weighing accuracy. Refer
to section "T.Calibration".
□ Electrified material or magnetic body may cause a weighing error.
□ Do not press keys with a sharp instrument (such as a pencil or ball
point pen).
□ Do not drop things on the pan, or place a weight on the pan that is
beyond the weighing range of the balance.
□ Keep the area clean and dry.
□ Consider section "2. Caution" for weighing operation.
Basic Operation (gram mode)
Step 1 Calibrate your balance before use. (Refer to section "7. Calibration")
Step 2 Place a container on the weighing pan, if necessary.
Press the | RE-ZERO | key to cancel net weight. The balance displays zero.
Container: A vessel placed on the pan, but not to be included in the
weighing data.
Step 3 Place material on the pan or in the container.
Step 4 Wait for the stabilization indicator to be disipayed and read the value.
Step 5 Remove the material and container from the pan.
Basic operation
page 13
5. Weighing
Counting Mode (pcs)
Selecting the counting mode
Step 1 Select the unit [p^ using the [MODE key. If the counting mode can not
be selected, refer to section "4. Weighing Units". ([p^ : pieces)
Storing a unit weight
Step 2 Press the [RANGE key to enter the sampling mode.
Step 3 If you want to select the number of items to be used for the sample, press
the [range I key (several times). It may be set to 10, 25, 50 or 100.
Step 4 Place acontaineron the weighing pan, if necessary. Pressi RE-ZERO [key
to cancel this weight,
ex.
I il [1 pcs[ is displayed in the case of 10 items.
Step 5 Place items on the pan. This number of items is the same quantity as
the number displayed (10, 25, 50 or 100).
Step 6 Wait for the stabilization indicator to come on. Press the [PRINT key to
calculate the unit weight and store it.
Counting Items
Step 7 You are now able to count the items by placing them on the pan.
Counting mode using the ACAI function
ACAI™ (Automatic Counting Accuracy Improvement) is a function that
improves the accuracy of the unit weight.
Step 8 If you add a few more items, the ACAI indicator turns on.
(The ACAI indicator turns off if in overload)
Step 9 The balance re-calculates the unit weight while the ACAI
indicator is blinking. Wait and do not touch the items on
the pan until the ACAI indicator turns off automatically.
Step 10 You are now able to count items with a more accurate unit
weight.
Stepll If you add a few more items, proceed to step 8. The
balance re-calculates a more accurate unit weight.
ACAI indicator
i
Detectinq items
, 1,
◄
Calculating
unit weight
7
Counting mode
pcs
pcs
pcs
5. Weighing
Page 14
Basic operation
Percent Mode (%)
Selecting the unit of percent nnode
Step 1 Select the unit % using the MODE key. If the percent mode can not be
selected, refer to section "4. Weighing Units". ( % : percent)
Storing 100% weight
Step 2 Press the | RANGE key to enter the sampling mode.
Step 3 Place a container on the weighing pan, if necessary.
Press the | RE-ZERO | key to cancel the container weight and possible
error. The balance displays I//7/7 B%
Step 4 Place the item of 100% weight on the pan or in the container.
Step 5 Press the [PRINT key to store this 100% weight.
Step 6 Remove the item from the pan.
Reading percentage
Step 7 You are now able to read the percentage based on the stored 100%
weight.
Basic operation
page 15
5. Weighing
6. Response Adjustfinent
This function stabilizes the weight value, reducing the influence on weigh
ing that is caused by drafts and/or vibration at the place where the balance
is installed. This function adjusts by automatically analyzing the environ
ment or by hand-operation. The function has three stages as follows :
Indicator Function table Summaries
FAST
MID.
SLOW
RESPONSEÎrASTIIMlD.lfSlLÜWl'
fin 11 11 ft
yyijyij
Note
□ If the automatic response adjustment is to awkward, Try to refine it using
the section "Manual Response Adjustment".
^ - J
L Ü n U U
r _ 1 1
L U > 1 LI t
r . ^ J Zl
L Û n U L
Response Indicator
Fast response. Sensitive value
Slow response. Stable value
□ The response adjustment can be changed at "Condition {[and)" of
"Environment & Display {bnSi-nc)" in the function table. Refer to "9.
Function table".
Automatic Response Adjustment
This way automatically updates the response adjustment by analyzing the
influence of the environment on the weight data.
Operation
Step 1 Press and hold the [MODE | key until [RESPONSE
displayed.
Step 2 The balance analyzes the influence and updates the
response adjustment. If you want to cancel this
update, press the |CAL| key.
is Press and hold the key.
RESPONSE
- Release the key.
RESPONSE
r U
L ) I ... ,,, ...
Caution
Do not allow vibration or drafts to affect the balance.
Step 3 The balance returns to the weighing mode automati
cally and displays the updated response indicator.
6. Response Adjustment
Page 16
\}
RESPONSE tvî5~l
$ u 1)} $ $ i W
y.uuuu s
Adapting to environment
Manual Response Adjustment
This way updates the response adjustment manually.
Operation
Step 1 Press and hold the |MODE key until |RESPONSE! is displayed
Press the jMQDE key immediately.
Step 2 Select a stage of the response adjustment using the |MODE key. Either
FAST or MID. or SLOW can be selected.
Step 3 The balance automatically returns to the weighing mode after a few
seconds of inactivity.
Adapting to environment
page 17
6. Response Adjustment
7. Calibration
Calibration Group
The GR series has the following modes concerning calibration and calibra
tion test.
□
Automatic Self Calibration
□
Calibration using the internal weight
Calibration using an external weight
□
Calibration test using the internal weight
□
Calibration test using an external weight
□
Correction of the internal weight value
□
Note
□ Calibration is controlled by the parameters of "Permission or prohibition".
Refer to section "8. Function Switch and Initialization".
□ The weight which can be used for calibration is called "the calibration
weight". The weight which can be used for calibration test is called "the
target weight". The weight which you have is called "the external weight".
Caution
□ This calibration achieves the adjustment for accurate weighing. It is
necessary to perform calibration in the following case.
• When the balance is installed for the first time.
• When the balance has been moved.
• When the ambient environment has changed.
• For periodical calibration.
□
Prevent vibration, drafts, and ambient temperature changes from the
influence for the balance during calibration.
□
□
The data for CLP (Good Laboratory Practice) can be output using the RS232C interface, when the "CLP output (,F q )" of "Data output {do u b)" is
set to " /" orRefer to section "9. Function table".
This indicator means "the balance is measuring calibra
tion data". Do not allow vibration or drafts to affect the
balance while this indicator is displayed.
Caution using an External Weight
□ The accuracy of an external weight can influence the accuracy of weighing.
Product
GR-120
GR-200
GR-300
GR-202
7. Calibration
Usable external weight
lOOg, 50g
200g,lOOg
200g, 300g
200g, 100g
Page 18
Adjustable range
+15.9 mg ~ -15.0 mg
Adapting to environment
Automatic Self Calibration
This function automatically calibrates the balance, when the balance
detects an ambient temperature change.
When the balance detects a change in ambient tem
perature, this indicator blinks and automatic self calibra
tion is required. If the balance is not used for several
minutes with this indicator blinking, the balance pre
forms automatic self calibration. The environment will
affect the time that the indicator blinks.
r i;ii
I. III.
This display means "the balance is measuring calibra
tion data". Do not allow vibration or drafts to affect the
balance while this indicator is displayed.
Advice
You can use the balance while the indicator blinks. But, it is recommended
that to maintain the best accuracy, stop using the balance and confirm that
there is nothing on the pan when the indicator starts blinking.
Caution
□ Do not place anything on the weighing pan during automatic calibration.
Control of Automatic Self Calibration
Automatic self calibration is controlled by a parameter in "Permission or
prohibition". Refer to section "8. Function Switch and Initialization"
n n
II IJ
i 1 i
i 1 ?
Adapting to environment
-Automatic Self Calibration
0 : Not used
1 : Used
page 19
7. Calibration
Calibration Using the Internal Weight
This function calibrates the balance using the internal weight.
Operation
Step 1 Connect the AC adapter and warm up the balance for
at least one hour with nothing on the weighing pan.
Step 2 Press the CAL| key to start calibration.
Step 3 The balance displays\[nj ~ m\ and performs calibra
tion. Prevent vibration and drafts from affecting the
balance.
Step 4 Ifthe "CLP output ( ,n/-o)" of the "Function Table" isset
to
232C interface.
Step 5 The balance will automatically return to the weighing
mode after calibration.
or "P", "Calibration Report" is output from RS-
Step 6 Test the accuracy of weighing using the calibration test
function or by using a certified test weight.
Control of this Calibration
Calibration using the internal weight is controlled by a
parameter in "Permission or prohibition". Refer to section
"8, Function Switch and Initialization".
n n M ( i
II U M M
-----------A--
-Calibration Using the internal Mass
0 ; Not used
1 : Used
7, Calibration
Page 20
Adapting to environment
This function tests the balance accuracy using the internal weight.
Operation
Step 1 Connect the AC adapter and warm up the balance
for at least one hour with nothing on the pan.
o nnnnri
ULIUUU 9
Step 2 Press and hold the CAL key until display-
ing
I I
L L in
and then release the key.
Step 3 The balance measures the zero point.
Prevent vibration and drafts to affect the balance.
Step 4 The measured zero point data is displayed.
Step 5 Ready for the internal weight measurement.
Step 6 The balance measures the internal weight.
Prevent vibration and drafts to affect the balance.
Step 7 The internal weight data is displayed.
Step 8 The balance informs you when the calibration test
is finished. If the "CLP output ( ,n/-o)" of fh®
"Function Table" is set to " /" or "P", "Calibration
Test Report" is output by the RS-232C interface.
Press and hold the key/C
f ra
-Release the key
______
innnrmn
C UUJJLIUU 9
GLP output
CalibrationTest Report^
r r
t L
r r
1- .
^
nnnnn
UUUUU 9
r r
L L
J
I OU
in g
)■
Step 9 Thebalancewill automatically return to the weigh
ing mode after the calibration test is finished.
Adapting to environment
page 21
O nnnnn
UUUUU 9
7, Calibration
4^ Calibration Using an External Weight
This function calibrates the balance using an external weight. The weight
to be used for calibration is called "the calibration weight". The weight which
you have is called "the external weight".
Operation
Step 1 Connectthe AC adapter and warm up the balance
for at least one hour with nothing on the pan.
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Step 2 Press and hold the CAL key until displaying
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Step 3 The balance displays
and then release the key.
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□ If you want to change the calibration weight
value, proceed to step 4.
□ If you use the stored calibration weight value
in the balance, proceed to step 5.
Step 4 Press the ¡RANGE | key and adjust the calibration
weight value using the following keys.
RE-ZERO
key
The key to set the value of the
digit selected.
RANGEi key
The key to select the digitto change
value.
PRINT key
The key to store a new weight
value and return to step 3.
CAL key
The key to cancel this change
and return to step 3.
Product Usable weight
GR-120
GR-200
GR-300
GR-202
lOOg, 50g
200g, 100g -f15.9 mg ~ -15.0 mg
200g, 300g
200g, 100g
Adjustable range
Press and hold the key
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(J
■Release the key
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ex. calibration weight
value = 200.0017g
Initial calibration
weight value is
200.0000g at
GR-200.
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Note Digits cyclically change using the ¡RE-ZERO key.
ex. 0mg-^-h15mg-^-15mg-^0mg
Step 5 Confirm that there is nothing on the pan and press
the jPRÎÏ^ key. The balance measures the zeropoint. Prevent vibration and drafts from affecting
the balance.
7. Calibration
Page 22
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