Operating instructions Differential weighing software

Operating instructions
METTLER TOLEDO
Differential weighing
software with LC-BCR
Bar-Code Reader
for G balances
General balance settings
Selecting repeatability
The better the repeatability, the longer the weighing operation.
Your will find detailed information on the general balance settings in the operating instructions of your balance.
Good repeatability (factory setting)
Setting vibration adapter
Very good repeatability
The vibration adapter is used to match your balance to the ambient conditions
(vibrations, drafts at location):
Best possible repeatability
Normal repeatability
Setting for normal ambient conditions (factory setting)
Setting for unstable surroundings
Resetting balance
Setting for virtually disturbance-free, stable surroundings
Setting weighing process adapter
The weighing process adapter is used to match your balance to different types of
weighings (absolute weighings, fine additions, etc.)
Universal setting (factory setting)
Fine addition
Special applications
Absolute weighing
With the appropriate bar-code command, you can reset all menu settings to the
factory setting and clear the weighing data of all memory positions. Use of this
command results in the loss of all individual menu settings and all weighing
data stored in the database!
Adjustment (calibration)
You will find detailed information on the adjustment (calibration) in the operating instructions of your balance. The following functions can be initiated directly by means of bar-code commands:
–
–
–
–
–
Internal adjustment (calibration)
External adjustment (calibration)
Test with internal weight
Test with external weight
Selection of a different weight
General balance settings
Adjustment (calibration)
Setting vibration adapter
Internal adjustment (calib.)
*X12*
Each time this bar code is read in,
the next setting of the vibration adapter
is selected.
*X20*
Perform adjustment (calibration)
with internal weight.
External adjustment (calib.)
Setting weighing process adapter
*X13*
Each time this bar code is read in,
the next setting of the weighing process
adapter is selected.
*X21*
Perform adjustment (calibration)
with external weight.
Internal test
*X22*
Perform test with internal weight.
Selecting repeatability
*X14*
Each time this bar code is read in,
the next setting of the repeatability
is selected.
External test
*X23*
Perform test with external weight.
Select a different weight
Resetting balance
Warning: When the balance is reset, all menu
settings are reset to the factory setting and
all weighing data in the database are lost!
*X07*
Select a different weight for
the external adjustment (calibration).
*X24*
The balance acknowledges the resetting
with the message “r done”.
Balance
settings
Process
settings
Taring and
weighing-in
Taring as a
separate step
Weighing-in as
a separat step
Differential
weighing
Fields
BC keyboard
Automatic weight detection
A.dEt.
A.dEt.
ON
Automatic weight detection switched on (factory setting): In each operation, the balance automatically detects the weight change and transfers this on stability.
OFF
Automatic weight detection switched off: In each operation, you must confirm the loading or removal of the
weight using the bar-code command “Confirm/YES”.
Position selection
Record format
Sh. Print
Lo..
AUtO POS.
Automatic position selection (factory setting): The
balance automatically selects the first memory position
which does not contain a value for the selected operation.
Ÿ≈AN.
Manual position selection: For each operation, the
balance starts with memory position 1. You then select
the desired memory position with the bar-code command “Go to memory position”.
POS.
tArA no
Print
Taring function
tArA YES
Short format (factory setting): The record includes the
number of the current memory position, the determined
weight values (tare, initial weighing, back weighing)
and the result of the differential weighing in percent.
Long record: In addition to the data which appear in
the short record, long records include the identification
of each sample, the current date and time of each individual weighing operation (tare, initial weighing, back
weighing) and the result of the differential weighing in
grams.
Printer setting
OFFLinE
Taring function switched on (factory setting): Setting
for work with weighing containers which need to be
tared.
Taring function switched off: Setting for work without
weighing containers.
OnLinE
Collective record (“offline”, factory setting): The
weighing data are not printed out until you press the
“±” key briefly in the weighing mode. The record
contains the stored data of all completed differential
weighings.
Continuous record (“online”): All weighing data are
automatically printed out immediately following the
weighing operation.
Automatic weight detection
Switch on automatic weight detection
Switch off automatic weight detection
Record format
*X15*
Short format
*X30*
*X16*
Long format
*X31*
Printer setting
Position selection
Automatic position selection
Manual position selection
*X17*
Collective record
*X32*
*X18*
Continuous record
*X33*
Taring function
Switch on taring function
*X25*
Switch off taring function
*X26*
Balance
settings
Process
settings
Taring and
weighing-in
Taring as a
separate step
Weighing-in as
a separat step
Differential
weighing
Fields
BC keyboard
– Read sample ID (bar codes only)
– Assign any character string as sample ID (using
bar-code keyboard)
– Delete sample ID
Taring and weighing-in (in a single cycle)
Precondition: Taring function must be switched on (see section “Process settings”. If the automatic weight detection is switched off, the loading and removal
of weights in taring and weighing-in must be confirmed with the bar-code command “Confirm/YES”.
You will find detailed information on the ID functions in
sections 10.2 and 10.3 of the operating instructions of
the differential weighing software.
The operation comprises the following individual steps:
Clear database (optional)
In the weighing mode, execute the bar-code command “Clear database”. All weighing data will be lost!
t And SA
1 L___J
1 L___J
Call up taring and weighing-in function
Execute bar-code command “Taring and weighing-in
in a single cycle”.
Tare weighing container
Place empty weighing container on pan.
Weigh in sample
Add sample to container.
With automatic position selection, the first memory
position which does not contain a tare value is displayed, with manual position selection, memory position 1 is displayed.
1 L≠õ≠J
Select memory position (optional)
Select bar-code command “Go to memory position”,
read in desired number using BC keyboard and close
with “Confirm/YES” or “ã”.
LiFt UP
Execute ID functions (optional)
At this point you can execute the following optional ID
functions:
2 L___J
Close taring and weighing-in operation
Perform another taring and initial weighing or …
Ÿ≈ donE
… close the function “Taring and weighing-in in a single cycle” with the bar-code command “End measurement procedure”.
– Use numbers of the memory positions as sample
IDs
– Assign own bar code as sample ID
Remove weighing container and sample
Lift off weighing container and sample.
Taring and weighing-in (procedure and basic commands)
ID Functions
1. Clear database (optional)
Assign sample ID:
2. Call up taring and weighing-in
function:
*X08*
3. Select memory position (optional)
4. ID functions (optional)
5. End measurement procedure:
Use numbers of the memory positions
as sample IDs:
(possibly only in weighing mode!)
*X35*
Assign bar code as sample ID:
*X28*
*X36*
Read in own bar code
General commands
Confirm/Yes or “ã”:
Abort/No or “ESC”:
*X04*
*X03*
Assign any character string
as sample ID:
*X38*
Enter character string using
BC keyboard and close entry
with “ã”
Clear database
Clear database:
(possible only in weighing mode!)
*X29*
Read sample ID:
(bar codes only)
Read in own bar code
Confirm clearance
Delete sample ID:
*X00*
Select memory position
Confirm deletion
Go to memory position:
*X41*
Select memory position:
Enter number using
BC keyboard and confirm
with “ã”
Balance
settings
Process
settings
Taring and
weighing-in
Taring as a
separate step
Weighing-in as
a separat step
Differential
weighing
Fields
BC keyboard
– Read sample ID (bar codes only)
– Assign any character string as sample ID (using
bar-code keyboard)
– Delete sample ID
Taring as a separate step
Precondition: Taring function must be switched on (see section “Process settings”. If the automatic weight detection is switched off, the loading and removal
of weights in taring must be confirmed with the bar-code command “Confirm/
YES”.
You will find detailed information on the ID functions in
sections 10.2 and 10.3 of the operating instructions
for differential weighing software.
The operation comprises the following individual steps:
Clear database (optional)
In the weighing mode, execute the bar-code command “Clear database”. All weighing data will be lost!
tArA
1 L___J
1 L___J
Call up taring function
Execute bar-code command “Separate taring”.
With automatic position selection, the first memory
position which does not contain a tare value is displayed, with manual position selection, memory position 1 is displayed.
LiFt UP
– Use numbers of the memory positions as sample
IDs
– Assign own bar code as sample ID
Remove weighing container
Lift off weighing container.
Transfer first tare to all memory positions (optional)
Select bar-code command “First tare to all memory
positions”. This command can be executed only if no
tare values are stored in the database!
Select memory position (optional)
Select bar-code command “Go to memory position”,
read in desired number using BC keyboard and close
with “Confirm/YES” or “ã”.
Execute ID functions (optional)
At this point you can execute the following optional ID
functions:
Tare weighing container
Place empty weighing container on pan.
Close taring operation
Perform another taring or …
2 L___J
Ÿ≈ donE
… close the function “Separate taring” with the barcode command “End measurement procedure”.
Taring as a separate step (procedure and basic commands)
ID Functions
1. Clear database (optional)
Assign sample ID:
Use numbers of the memory positions
as sample IDs:
(possibly only in weighing mode!)
2. Call up taring function:
*X09*
*X35*
3. Select memory position (optional)
*X28*
Assign bar code as sample ID:
4. ID functions (optional)
5. Transfer first tare to all
memory positions (optional)
6. End measurement procedure:
Read in own bar code
*X36*
*X38*
Assign any character string
as sample ID:
Enter character string using
BC keyboard and close entry
with “ã”
General commands
Confirm/Yes or “ã”:
Abort/No or “ESC”:
*X04*
*X03*
Read sample ID:
(bar codes only)
Read in own bar code
Delete sample ID:
*X00*
Clear database
Clear database:
(possible only in weighing mode!)
*X29*
Confirm deletion
Confirm clearance
Select memory position
Transfer first tare to all memory positions
Go to memory position:
*X41*
Select memory position:
Enter number using BC keyboard and confirm with “ã”
Balance
settings
Process
settings
Taring and
weighing-in
Transfer first tare to
all memory positions:
(possible only if no tare values are stored)
Taring as a
separate step
Weighing-in as
a separat step
*X34*
Differential
weighing
Fields
BC keyboard
– Read sample ID (bar codes only)
– Assign any character string as sample ID (using
bar-code keyboard)
– Delete sample ID
Weighing-in as a separate step
Precondition: At least one tare value must be available or the taring function
must be switched off (see section “Process settings”. If the automatic weight
detection is switched off, the loading and removal of weights in weighing-in must
be confirmed with the bar-code command “Confirm/YES”.
You will find detailed information on the ID functions in
sections 10.2 and 10.3 of the operating instructions
for differential weighing software.
The operation comprises the following individual steps:
Clear database (optional)
In the weighing mode, execute the bar-code command “Clear database”. All weighing data will be lost!
SAŸ≈PLE
1 L≠õ≠J
1 L≠õ≠J
Weigh in sample
Place sample (with weighing container if you are working with tare) on pan.
Call up weighing-in function
Execute bar-code command “Separate weighing-in”.
With automatic position selection, the first memory
position which does not contain an initial weight is displayed, with manual position selection, memory position 1 is displayed.
Select memory position (optional)
Select bar-code command “Go to memory position”,
read in desired number using BC keyboard and close
with “Confirm/YES” or “ã”.
Execute ID functions (optional)
At this point you can execute the following optional ID
functions:
– Use numbers of the memory positions as sample
IDs
– Assign own bar code as sample ID
LiFt UP
Remove sample
Lift off sample (and weighing container if used).
Close weighing-in operation
Perform another initial weighing or …
2 L≠õ≠J
Ÿ≈ donE
… close the function “Separate weighing in” with the
bar-code command “End measurement procedure”.
Weighing-in as a separate step (procedure + basic commands)
ID Functions
1. Clear database (optional)
Assign sample ID:
2. Call up weighing-in function:
*X10*
3. Select memory position (optional)
Use numbers of the memory positions
as sample IDs:
(possibly only in weighing mode!)
*X35*
Assign bar code as sample ID:
*X28*
4. ID functions (optional)
5. End measurement procedure:
*X36*
Read in own bar code
General commands
Confirm/Yes or “ã”:
Abort/No or “ESC”:
*X04*
*X03*
Assign any character string
as sample ID:
*X38*
Enter character string using
BC keyboard and close entry
with “ã”
Clear database
Read sample ID:
(bar codes only)
Read in own bar code
Delete sample ID:
Select memory position
*X00*
Go to memory position:
*X41*
Confirm deletion
Select memory position:
Enter number using BC keyboard and confirm with “ã”
Clear database:
(possible only in weighing mode!)
Balance
settings
Process
settings
*X29*
Confirm clearance
Taring and
weighing-in
Taring as a
separate step
Weighing-in as
a separat step
Differential
weighing
Fields
BC keyboard
– Assign any character string as sample ID (using
bar-code keyboard)
– Delete sample ID
Differential weighing
Precondition: At least one initial weight must be available. If the automatic
weight detection is switched off, the loading and removal of the sample in back
weighing must be confirmed with the bar-code command “Confirm/YES”.
You will find detailed information on the ID functions in
sections 10.2 and 10.3 of the operating instructions
for the differential weighing software.
The operation comprises the following individual steps:
dIFF
1 L≠≠≠J
Call up differential weighing function
Execute bar-code command “Differential weighing”.
1 L≠≠≠J
With automatic position selection, the first memory
position which does not contain a differential weighing
value is displayed, with manual position selection,
memory position 1 is displayed. Note: The manual position selection allows multiple differential weighings.
Select memory position (optional)
Select bar-code command “Go to memory position”,
read in desired number using BC keyboard and close
with “Confirm/YES” or “ã”.
Execute ID functions (optional)
At this point you can execute the following optional ID
functions:
– Use numbers of the memory positions as sample
IDs
– Assign own bar code as sample ID
– Read sample ID (bar codes only)
‹
-1)61 %
LiFt UP
2 L≠≠≠J
Ÿ≈ donE
Back weigh sample
Place sample (with weighing container if you are working with tare) on pan.
The result of the differential weighing is shown briefly.
Remove sample
Lift off sample (and weighing container if used).
Close differential weighing operation
Perform another back weighing or …
… close the function “Differential weighing” with the
bar-code command “End measurement procedure”.
Differential weighing (procedure and basic commands)
1. Call up differential weighing:
Assign sample ID:
*X11*
2. Select memory position (optional)
3. ID functions (optional)
4. End measurement procedure:
ID Functions
*X36*
Use numbers of the memory positions
as sample IDs:
(possibly only in weighing mode!)
*X35*
Assign bar code as sample ID:
*X28*
Read in own bar code
General commands
Confirm/Yes or “ã”:
Abort/No or “ESC”:
*X04*
*X03*
Assign any character string
as sample ID:
*X38*
Enter character string using
BC keyboard and close entry
with “ã”
Select memory position
Go to memory position:
*X41*
Select memory position:
Enter number using BC keyboard and confirm with “ã”
Read sample ID:
(bar codes only)
Read in own bar code
Delete sample ID:
*X00*
Confirm deletion
Balance
settings
Process
settings
Taring and
weighing-in
Taring as a
separate step
Weighing-in as
a separat step
Differential
weighing
Fields
BC keyboard
Error messages
In work with the bar-code reader. error messages draw your attention to the existence of incorrect operation or that the differential weighing software could not
interpret a bar code.
NOt USEd
no CodE
The bar code read in is known, but the associated
command can not be executed at present.
This message always appears when the selected command can not be executed in the current operational
mode of the balance (e.g. if you attempt to set the vibration adapter in the differential weighing mode).
noACCESS
not SEt
The bar code read in is unknown
You have read in a bar code which the differential weighing software can not interpret.
USEd
The sample identification read in is already in use
You have attempted to assign a sample identification
which has already been assigned to a memory position.
ILLEGAL
The bar code read in is inadmissible
You have read in a bar code which may not be used
(e.g. you have tried to use a bar-code command as a
sample identification).
dAtA End
The selected memory position is already occupied.
This message appears only with automatic position
selection. You have selected a memory position (with
the command “Go to memory position” or by reading in
your own bar code) which already contains a value for
the selected operation (e.g. you wish to determine a
tare value for the selected memory position, but a tare
value already exists).
No sample identification available
You have attempted to delete a sample ID with the command “Delete sample ID”, but the selected memory
position contains no sample ID.
The balance displays the message “Data End” and
returns to the weighing mode.
The balance can not find a memory position which it
can assign to the planned operation. This may be the
case if there is no free memory position available or if
you wish to back weigh a sample but there is no memory position which contains a tare or initial weight (in
such a case, the balance has no possibility to assign
the back weighing to a memory position).
In the entry of characters and numbers using the bar
code keyboard, please note the following information:
Notes on working with the bar code keyboard
The bar code keyboard (BC keyboard) is based on a normal PC keyboard. Please
note the following information:
ESC
With the bar code “ESC” you can abort the entry at any
particular point. Characters already read in are ignored.
MettlerMettler-Toledo GmbH
20-Jan-1995
3
ä
With the bar code “ä
ä”, you can delete wrong entries
character by character. This code can also be used to
delete an existing sample ID completely or partly.
T
NE
NR
14:23
20.6126 g
20-Jan-1995
3
14:22
2.6070 g
20-Jan-1995
3
While the 7-segment display of the balance can not
show all characters properly, these are shown correctly
on the printed records (compare display and printout
opposite).
14:27
9.2898 g
-------------
àShift
âCaps
à Shift”, the next character
If you select the bar code “à
appears in uppercase and a switch is then automatically made to lowercase.
â Caps” you can switch permanentWith the bar code “â
ly to uppercase, which remains active until you press
â Caps” again.
“â
-11.3228 g
Diff.:
-54.93 %
=============
‹r-Toledo
The display of the balance can show only 8 characters
at the same time, with longer entries (max. 20 characters) the text is shifted to the left and an asterisk displayed to indicate this.
With the bar code “Space”, you can insert a space.
Space
ã
Balance
settings
ã”, you can close your entry and
With the bar code “ã
store it. The storage is confirmed briefly by the message
“Stored”.
Process
settings
Taring and
weighing-in
Taring as a
separate step
Weighing-in as
a separat step
Differential
weighing
Fields
BC keyboard
BC keyboard
*X03*
ESC
*1*
*2*
*3*
*4*
*5*
*6*
*7*
*8*
*9*
*0*
*X37*
1
2
3
4
5
6
7
8
9
0
ä
*Q*
*W*
*E*
*R*
*T*
*Z*
*U*
*I*
*O*
*P*
*X04*
Q
W
E
R
T
Z
U
I
O
P
ã
*A*
*S*
*D*
*F*
*G*
*H*
*J*
*K*
*L*
*X40*
A
S
D
F
G
H
J
K
L
â Caps
*Y*
*X*
*C*
*V*
*B*
*N*
*M*
*.*
*-*
*X39*
Y
X
C
V
B
N
M
.
-
à Shift
*XXXX*
Space
Bar-code keyboard: Please fold out
Balance
settings
Process
settings
Taring and
weighing-in
Taring as a
separate step
Weighing-in as
a separat step
Differential
weighing
Fields
BC keyboard
To protect your METTLER TOLEDO product’s future:
METTLER TOLEDO Service assures the quality, measuring accuracy and preservation
of value of all METTLER TOLEDO products for years to come.
Please send for full details about our attractive terms of service.
Thank you.
Subject to technical changes and to the availability
of the accessories supplied with the instruments.
Printed on 100 % chlorine-free Paper,
for the sake of our environment.
P11780056
© Mettler-Toledo GmbH 1998
11780056 Printed in Switzerland 9807/2.11
Mettler-Toledo GmbH, Laboratory & Weighing Technologies, CH-8606 Greifensee, Switzerland
Phone +41-1-944 22 11, Fax +41-1-944 30 60, Internet: http://www.mt.com
Operating instructions
METTLER TOLEDO
Differential weighing software for G balances
Differential weighing software for METTLER TOLEDO G balances
2
Contents
1.
1.1
1.2
1.3
1.4
Introduction ..............................................................................................................
Before you start ...........................................................................................................
Important information on differential weighing .................................................................
Standard equipment ....................................................................................................
Options ......................................................................................................................
3
3
3
5
6
2.
Installation of the application cassette ......................................................................
6
3.
Setting date and time ................................................................................................
7
4.
The menu .................................................................................................................
8
5.
5.1
5.2
5.3
Selection of the default settings for differential weighing ...........................................
Notes on storing the measured values ...........................................................................
General default settings ................................................................................................
Default settings for differential weighing ..........................................................................
10
10
10
11
6.
6.1
6.2
6.3
6.4
6.5
6.6
Taring, weighing-in and back weighing .......................................................................
Taring and weighing-in in a single cycle .........................................................................
Separate taring of the weighing container ........................................................................
Separate weighing-in of the sample ...............................................................................
Single and multiple differential weighings of the sample ....................................................
Records .....................................................................................................................
What if...? ..................................................................................................................
14
14
17
17
18
20
21
7.
Inquiry of the stored values via a PC ........................................................................... 21
8.
Changing the back-up battery .................................................................................... 22
9.
Operating instructions in foreign languages ................................................................ 22
10.
10.1
10.2
10.3
10.4
Working with the bar-code reader ..............................................................................
Handling the bar-code reader .......................................................................................
Bar-code commands ..................................................................................................
Working with sample identifications ..............................................................................
Error messages in work with the bar-code reader ............................................................
23
23
23
25
27
Differential weighing software for METTLER TOLEDO G balances
3
1.
Introduction
1.1
Before you start
Our thanks for purchasing the differential weighing software for your METTLER TOLEDO balance. This software enables you to perform differential weighings and store the measured values of up to 99 samples.
Thanks to the integrated database and simple operation, the differential weighing software is especially
suitable for routine measurements under production conditions. The differential weighing software is
basically intended only for G balances equipped with a LocalCAN universal interface (AG, PG, PG-S with
LC-G option).
These instructions describe work with the differential weighing software; they presuppose
that you are familiar with the operation of your balance. You will find the appropriate
information in the operating instructions and short-form operating instructions you received with your balance.
The operating instructions for the differential weighing software are available in different
languages (see list in section 9). Please contact your METTLER TOLEDO dealer if you
need the instructions in another language.
Please read and comply with all cautionary notes listed in the operating instructions
of your balance.
The differential weighing software is designed for operation with the optional METTLER
TOLEDO LC-BCR Bar-Code Reader. The bar-code reader can be operated only when
attached to a LocalCAN universal interface (see also balance models mentioned above).
Operations marked by the symbol opposite can be performed quickly and conveniently
with the bar-code reader.
1.2
Important information on differential weighing
The principle of differential weighing
Differential weighing involves the investigation of one or more samples for weight changes. The first step
comprises determination of the initial weight of the sample. Certain components are then added to or separated from the sample. Such operations include drying, centrifuging, filtering, ashing, vapor deposition,
coating, etc. After treatment, the sample is reweighed (back weighing). This final weight is used as the
basis for calculation of the result, which is normally shown as a content value in the form of a percentage of
the initial weight.
The differential weighing software handles up to 99 samples, controls the work routine and calculates the
results, which you can then print out if desired.
Three different operating techniques are available to perform differential weighings and are supported by the
differential weighing software. These three methods of operation are described briefly in what follows.
Differential weighing software for METTLER TOLEDO G balances
4
Method 1 (with taring and weighing-in in a single cycle)
This is the simplest method as the tare of the weighing container and the initial weight (net weight) of the
sample are determined in a single operation:
Step 2
Remove or
add
components
Step 3
Back
weighing
➔
➔
Step 1
Tare and
determine
initial weight
Step 4
Print out
results
---- RUECKWAEGUNG ----
Sample 1
➔
➔
1
T
1
NE
1
NR
Diff.:
2
T
2
NE
2
NR
Diff.:
○
Sample 2
○
➔
➔
○
3
T
3
NE
3
NR
Diff.:
Sample n
2.6066 g
1.9520 g
0.3401 g
-82.58 %
===========
2.6070 g
19.3709 g
0.3382 g
-98.25 %
===========
2.6070 g
21.4677 g
0.4482 g
-97.91 %
===========
(n = 1…99)
Method 2 (with separate taring and weighing-in)
In this method the weight of the weighing container (tare) and the initial weight (net weight) of the sample
are determined in separate operations. With this method, all weighing containers are first tared before the
determination of all initial weights in a second operation:
Step 2
Determine
initial weight
Step 3
Remove
or add
components
➔
➔
Step 1
Tare
➔
➔
Sample 1
➔
○
○
○
➔
(n = 1…99)
Step 5
Print out
results
---- RUECKWAEGUNG ---1
T
1
NE
1
NR
Diff.:
2
T
2
NE
2
NR
Diff.:
Sample 2
Sample n
Step 4
Back
weighing
3
T
3
NE
3
NR
Diff.:
2.6066 g
1.9520 g
0.3401 g
-82.58 %
===========
2.6070 g
19.3709 g
0.3382 g
-98.25 %
===========
2.6070 g
21.4677 g
0.4482 g
-97.91 %
===========
Differential weighing software for METTLER TOLEDO G balances
5
Method 3 (free working)
Whereas in methods 1 and 2 it is mandatory to follow the sample sequence, method 3 allows free working,
i.e. taring, determination of the initial weight and back weighing can be performed as single steps for each
sample. It is thus not mandatory to perform all 3 steps for a particular sample before continuing with the
next sample. The following diagram is intended only as an example of the free way of working:
Step 1
Tare
Step 2
Determine
initial weight
Step 3
Remove
or add
components
Step 4
Back
weighing
Step 5
Print out
results
Sample 1
➔
2
T
2
NE
2
NR
Diff.:
➔
---- RUECKWAEGUNG ----
➔
Sample 2
Sample 3
➔
➔
➔
Sample 2
Sample 1
1.3
1
T
1
NE
1
NR
Diff.:
3
T
3
NE
3
NR
Diff.:
2.6066 g
1.9520 g
0.3401 g
-82.58 %
===========
2.6070 g
19.3709 g
0.3382 g
-98.25 %
===========
2.6070 g
21.4677 g
0.4482 g
-97.91 %
===========
Standard equipment
Differential weighing software 238495 (with bar-code reader):
– Software application cassette (see illustration opposite)
– Operating instructions for the differential weighing software (this
document)
– METTLER TOLEDO LC-BCR Bar-Code Reader
– Instructions for operating the differential weighing software with the
LC-BCR Bar-Code Reader
Differential weighing software 238494 (without bar-code reader):
– Software application cassette (see illustration opposite)
– Operating instructions for differential weighing software (this document)
– Instructions for operating the differential weighing software with the
LC-BCR Bar-Code Reader
Please check that the standard equipment is complete. If any item is
missing, please contact your METTLER TOLEDO dealer.
Differential weighing software for METTLER TOLEDO G balances
6
1.4
Options
For recording the measurement results, we recommend one of the two METTLER TOLEDO printers
LC-P45 or LC-P43. The automatic result recording of all weighings saves you time-consuming transcription by hand and ensures the traceability of the weighing results.
The optional METTLER TOLEDO LC-BCR Bar-Code Reader facilitates operation of the
weighing system and offers you additional functions. You can use the bar-code reader to
call up all differential weighing functions and the basic settings of your balance directly
without recourse to the longer menu route. The bar-code reader can be operated only
when attached to a LocalCAN universal interface (balance models, see section 1.1).
2.
Installation of the application cassette
The differential weighing software is accommodated on an application cassette. This section describes the
installation of the application cassette using the example of an AG balance.
Switch the balance off by pressing and holding the “On/Off” key and
then disconnect it from the power supply.
AG balances
First remove the weighing pan (also the draft shield element if used)
and then the weighing chamber baseplate.
Remove the cover above the application cassette.
Hold the installed standard cassette by its clip and pull it up and out of
the holder.
PG-S balances
Remove the weighing pan, the weighing pan support and the draft
shield element.
Remove the knurled screws and the fastening plate (and protective
cover if used) and the transparent cover over the application cassette.
Note:
With PG/SG balances the cassette is located on the underside of the
balance (see PG/SG operating instructions).
Hold the installed standard cassette by its clip and pull it up and out of
its holder.
Differential weighing software for METTLER TOLEDO G balances
7
For both balance models
Insert the application cassette with the differential weighing software and press it down as far as it will go.
Push down the clip of the cassette.
Put transparent cover back in place and then reassemble your balance in the reverse sequence.
Your balance is now ready for work with the differential weighing software.
3.
Setting date and time
To ensure the date and time appear correctly on the result records of the METTLER TOLEDO LC-P43 and LCP45 printers, you should first set the built-in clock.
Menu
Press and hold the “Menu” key until the display shown opposite appears. The balance is now in the setting mode for the date and time.
SEtUP
hold
1)0+97
Menu
F
2)0+97
Enter the current date in the format DD.MM.YY: The first number of the
date flashes and can now be changed with the ““” key.
Press the “±” key briefly to select the second number, which you can
now change with the ““” key.
Change the remaining numbers of the date as described above.
The European date format (day – month – year) is preset in the factory. As an alternative, you can select the American date and time representation under the menu option “Date format” (see section 4).
Menu
hold
StorEd
After you have finished setting the date, press the “Menu” key until
storage of the date is confirmed.
Differential weighing software for METTLER TOLEDO G balances
8
Menu
14û32
After storage of the date, the display for entry of the time appears
(hours:minutes). To change the time, follow exactly the same procedure as for changing the date.
StorEd
After you have entered all numbers of the time, press the “Menu” key
until storage of the time is confirmed. The balance then automatically
returns to the weighing mode.
hold
Thanks to the back-up battery in the application cassette, date and
time are stored in a fail-safe manner (you will find instructions on
how to change the battery in section 8).
On attachment of a METTLER TOLEDO LC-P45 Printer, the date and
time settings of the balance are active and override the corresponding settings of the printer.
4.
The menu
Changing the application cassette also changes the menu of your balance:
In the menu option “Functions” you can select whether you would like to perform only normal weighings (“F
none”) or also differential weighings (“F diff”).
There is only one menu option available for selection of the weighing unit. The selectable units correspond
to those of a normal G balance.
The menu options “Vibration adapter”, “Weighing process adapter” and “Repeatability” offer you the same
setting possibilities as with a normal G balance.
The menu option “Date format” allows you to choose between the European and American date and time
representation. With the METTLER TOLEDO printers, date and time are printed out in the selected format.
You can select the language in which the records should be printed. English, German, French, Spanish and
Italian are available. This setting affects the record printout, but not the dialog with the balance.
The menu options “Weight detection”, “Position selection”, “Tare”, “Record format”, “Printer setting” and
“Result display” offer specific setting possibilities for differential weighing. You will find detailed information
on these menu options in section 5.3.
The menu options “Adjustment (calibration)”, “Adjustment information (calibration information)” and “Settings” correspond to those of a normal G balance. Note: The “Reset” command in the menu option “Settings” not only resets all menu settings to the factory setting, but also deletes all weighing results in the
database.
Operation of the menu is the same as with the standard application cassette (see operating instructions of
the balance). If you possess the optional METTLER TOLEDO LC-BCR Bar-Code Reader, several functions
are directly accessible without recourse to the menu. You will find instructions on how to work with the barcode reader in section 10.
Differential weighing software for METTLER TOLEDO G balances
9
Menu overview
▼
Weighing mode
Menu
▼
▼
▼
1. Functions
▼
F nonE
F dIFF
▼
2. Weighing unit
▼
▼
*
FACT
▼
▼
*
Available settings: see operating
instructions of the G balance
OFFLinE
▼
▼
11. Record format
LANG. SP
▼
7. Language
LANG. d
LANG. F
tArA YES
▼
▼
9. Position selection
A.dEt. OFF
AUtO POS.
▼
* Setting(s) selectable directly using the METTLER TOLEDO LC-BCR
▼
tArA NO
*
▼
▼
A.dEt. ON
*
▼
8. Weight detection
Lo. Print
*
10. Tara
▼
LANG. E
▼
LANG. I
▼
▼
OnLinE
*
Sh. Print
US dAtE
▼
Eu dAtE
▼
▼
6. Date format
▼
▼
Good
AbS %
*
▼
▼
12. Printer setting
▼
*
%
▼
▼
5. Repeatability
▼
DIFF
▼
▼
Available settings: see operating
instructions of the G balance
▼
▼
2
Available settings: see operating
instructions of the G balance
13. Result display
▼
4. Weighing process
adapter
▼
Available settings: see operating
instructions of the G balance
▼
▼
2
Available settings: see operating
instructions of the G balance
*
14. Adjustment
▼
3. Vibration adapter
*
rESEt
▼
▼
Available settings: see operating
instructions of the G balance
▼
g
▼
Unit
15. Settings
Ÿ≈AN. POS.
Bar-Code Reader (option), see section 10.
Differential weighing software for METTLER TOLEDO G balances
10
5.
Selection of the default settings for differential weighing
In this section you will learn which values the differential weighing software can store and the preset
options you can use to adapt the differential weighing system to meet your needs. Many settings are directly
accessible via bar codes, presupposing you have a METTLER TOLEDO LC-BCR Bar-Code Reader (option).
Such settings are marked by the bar-code symbol. You will find additional information on working with bar
codes in section 10 and in the instructions for operating the differential weighing software with the LC-BCR
bar-code reader.
5.1
Notes on storing the measured values
The differential weighing software can store the measured values of up to 99 samples. Each memory position can accommodate the following 3 values of a sample:
– Tare weight (weight of the empty weighing container)
– Initial weight (weight of the weighed-in sample)
– Final weight (weight of the sample in back weighing).
The stored values are preserved even on power failure or if the balance is disconnected from the power
supply. However, you can naturally delete the values at any time to start a new weighing series.
5.2
General default settings
Menu options 1–7 contain general preset options for operation of the balance.
F dIFF
In the first menu option you select the function “F diff” if you wish to
perform differential weighings. For normal weighing operation, select
“F none” (factory setting).
Unit
In the second menu option you select the weighing unit for normal
weighings. As the available weighing units depend on the balance
type, please consult the operating instructions of your balance.
@
Menu options 3 to 5 are used to match the balance to the operating
conditions. You will find detailed information on the following settings
in the operating instructions of your balance:
Vibration adapter (menu option 3)
Differential weighing software for METTLER TOLEDO G balances
11
Weighing process adapter (menu option 4)
Repeatability (menu option 5)
5.3
Eu dAtE
In the sixth menu option you can choose between the European (factory setting) and American date and time format. If a METTLER
TOLEDO printer is attached, the date and time are printed out in the
selected format.
LANG. d
In the seventh menu option you select the language for the record
printouts. You have available English (“LANG. E”, factory setting),
German (“LANG. d”), French (“LANG. F”), Spanish (“LANG. SP”) and
Italian (“LANG. I”). This setting affects the record printouts, but not
the dialog with the balance.
Default settings for differential weighing
In menu options 8–13 you select specific settings for the differential weighing. You can thus match the
weighing system to your personal way of working.
Automatic weight detection (menu option 8)
In this menu option you define whether the balance should work with
or without automatic weight detection.
A.dEt. ON
A.dEt. OFF
Automatic weight detection switched on (factory setting): For each
operation (taring, weighing-in, back weighing, lifting off weight), the
balance automatically detects the weight change and transfers this on
stability. This setting saves you the keystroke used to confirm that a
weight has been placed on or removed from the pan.
Automatic weight detection switched off: For each operation, you
must manually confirm that the weight has been placed on the pan or
removed from it by briefly pressing the “±” key. This setting is advisable for dispensing as with automatic weight detection there is a danger that the balance will transfer the weight before the dispensing operation is at an end.
Differential weighing software for METTLER TOLEDO G balances
12
Position selection (menu option 9)
In this menu option you specify whether the balance should work with
automatic or manual position selection:
AUtO POS.
Automatic position selection (factory setting): The balance automatically checks the status of all memory positions, i.e. it determines
what values (tare weight, initial weight, final weight) each position
already contains. It then automatically moves to the first position
which does not contain a value for the selected operation (taring,
weighing-in, back weighing).
Example
You have already tared 10 weighing containers at memory positions
1–10. The memory positions 11–15 already contain tare and initial
weights. Irrespective of the operation you are performing, the balance
automatically selects the correct memory position:
– If you tare a weighing container, the balance automatically selects
memory position 16 as this is the first position which does not contain a tare weight.
– If you weigh in a sample, the balance automatically selects memory position 1 as although this position contains a tare weight it is the
first which does not contain an initial weight.
– If you back weigh a sample, the balance selects memory position
11 as this position is the first position which contains a tare weight
and an initial weight (these two values must be available for a differential weighing operation to be performed).
Ÿ≈AN. POS.
Manual position selection: For every operation the balance starts at
memory position 1. You then select the desired memory position by
briefly pressing the ““” key the required number of times. If you wish
to perform several differential weighings for one memory position, you
must select this setting as the automatic position selection does not
allow multiple differential weighings.
Taring function (menu option 10)
In this menu option you can switch the taring function on or off.
tArA YES
Taring function switched on (factory setting): Select this setting if you
are working with weighing containers which require taring.
Differential weighing software for METTLER TOLEDO G balances
13
tArA no
Taring function switched off: Select this setting if you work without
weighing containers and consequently do not require the taring function. With this setting the functions “Taring” and “Taring and weighingin” are no longer available. You will find details of these functions in
section 6.
Warning!
When the taring function is switched (from “Tara YES” to
“Tara no” and vice versa), all weight values stored in the database
will be lost!
Record format (menu option 11)
In this menu option you can select the extent of detail of the printed
records. This menu option is important only if your balance is connected to a printer. You will find examples and illustrations of records
in section 6.
Sh. Print
Short record (factory setting): The record contains the number of the
current memory position, the determined weight values (tare, initial
weight, final weight) and the result of the differential weighing in percent.
Lo.. Print
Long record: In addition to the data which appear in the short record,
long records contain the identification of each sample, the current date
and time of each individual weighing operation (taring, weighing-in,
back weighing) and the result of the differential weighing in grams.
Printer setting (menu option 12)
In this menu option you specify whether the printer (if used) should
provide a record of every single weighing operation continuously or
whether you wish to print out a collective record at a particular time.
OFFLinE
OnLinE
Collective record (“offline”, factory setting): The weighing data are
not printed out until you briefly press the “±” key in the weighing
mode. The record contains the stored data of all completed differential
weighings.
Continuous record (“online”): All weighing data are automatically
printed out immediately following the weighing operation.
Differential weighing software for METTLER TOLEDO G balances
14
Result display (menu option 13)
In this menu option you specify the form in which the result of the
differential weighing should be displayed. The following settings are
available:
dIFF %
B−A
∗100%
A
AbS %
B
∗100%
A
6.
Weight difference in % (factory setting): The weighing result shows
the weight change of the sample as a percentage of the initial weight
(100%). Depending on the nature of the weight change, the result has
a plus (increase) or minus (decrease) sign. The percent weight difference is calculated using the formula shown opposite with “A” representing the initial weight and “B” the final weight.
Weight after differential weighing in %: The weighing result shows
the final weight as a percentage of the initial weight. The weight of the
initial weighing is used as the reference value (100%) . The result
should always be positive. The percent weight following the differential weighing is calculated using the formula shown opposite with “A”
representing the initial weight and “B” the final weight.
Taring, weighing-in and back weighing
In all the following descriptions, it is assumed that you have activated (“F diff”) in the menu option
“Function”. Each differential weighing operation comprises the three work steps “taring” (if you work with
weighing containers), “weighing-in” and “back weighing”. For the work steps “taring” and “weighing-in”
you have the following possibilities available:
– taring and weighing-in of a sample in a single cycle
– separate taring and weighing-in of a sample.
These possibilities and the back weighing are described separately in the following sections.
Note: You can terminate each weighing operation at any time by briefly pressing the “C” (cancel) key.
6.1
Taring and weighing-in in a single cycle
This method is available only if the taring function is activated in the menu (“Tara YES”, factory setting)! The method allows taring and weighing-in in a single operation.
=0000 g
Unload the weighing pan and then briefly press the “#” key to
set the display to zero.
Differential weighing software for METTLER TOLEDO G balances
15
Call up taring and weighing-in function
F
t And SA
Press and hold the “F” key until the balance displays the weighing
options. The first option that appears is “Taring and weighing-in” (tare
and sample).
hold
Menu
rES. bASE
Briefly press the “±” key to start the taring and weighing-in cycle. If
no bar-code reader is attached and data are already stored in the database, you are asked if you wish to clear the database. This inquiry
does not appear if you have connected a bar-code reader!
Clearing the database:
Menu
If you wish to delete all existing data, press and hold the “±” key until
deletion is confirmed.
r donE
hold
Continue working with existing database:
If you wish to continue working with the existing data, press the “±”
key briefly.
Menu
Select memory position
F
○ ○ ○ ○ ○ ○
6 L___J
7 L___J
○ ○ ○ ○ ○ ○
1 L___J
6 L___J
F
If the automatic position selection is activated in the menu (“AUTO
POS.”, factory setting), the display shows the first memory position
which does contain a tare value, position 6 in the example opposite (if
you have cleared the database or it does not contain a value, position
1 always appears). If you do not wish to accept the suggested memory position, you can select a different position by pressing the ““”
key the required number of times. Positions which already contain a
tare value can not be selected and are automatically skipped.
With manual position selection (“MAN POS.”), memory position 1
always appears and you must select the desired memory position
yourself by briefly pressing the ““” key the required number of times.
Care: In contrast to automatic position selection, it is possible to select a memory position which already contains a tare and an initial
weight. In such a case, the existing data will be overwritten on taring
and weighing-in.
Differential weighing software for METTLER TOLEDO G balances
16
Tare weighing container
The flashing weighing container symbol in the display now prompts
you to place the container on the pan. Place container on weighing
pan.
7 L___J
If the automatic weight detection is switched on (“A.det ON”, factory
setting), the tare weight will be automatically stored on stability.
&4825 g
&4825 g
Menu
If the automatic weight detection is switched off (“A.det OFF”), briefly press the “±” key to store the tare weight.
Weigh in sample
After storage of the tare weight, the flashing sample symbol prompts
you to add the weighing sample to the weighing container.
6 L≠õ≠J
If the automatic weight detection is switched on (“A.det ON”, factory
setting), the weight of the sample will be automatically stored on stability.
1ç3644 g
1ç3644 g
Menu
If the automatic weight detection is switched off (“A.det OFF”), briefly
press the “±” key to store the sample weight.
Remove weighing container and sample
LiFt UP
After storage of the sample weight you are prompted to remove the
weighing container and the sample.
If the automatic weight detection is switched on (“A.det ON”, factory
setting), the balance automatically detects the removal of the weighing sample.
If the automatic weight detection is switched off (“A.det OFF”), briefly press the “±” key after removal of the sample.
Differential weighing software for METTLER TOLEDO G balances
17
Close taring and weighing-in operation
6 L___J
Menu
Ÿ≈ donE
After removal of the weighing container and sample, the next memory
position is displayed. You can now either:
Perform another taring and weighing-in as described above or …
… close the function “Taring and weighing-in” by pressing and holding the “±” key. Completion of the weighing operation is confirmed
in the display and the balance then automatically returns to the weighing mode.
hold
=0000 g
6.2
Separate taring of the weighing container
This method is available only if the taring function is activated on the menu (“Tara YES”, factory
setting)! The method is used if several weighing containers have first to be tared followed by weighing-in of
the sample(s) (separate weighing-in of the sample(s) is described in the next section).
tArA
Press and hold the “F” key until the balance displays the weighing
options. Select the function “Taring” (Tara) by briefly pressing the
““” key the required number of times.
Perform all other operations as described in the previous section; only
the step “Weigh in sample” is omitted.
6.3
Separate weighing-in of the sample
This method is suitable for the weighing-in of several samples in succession (separate taring of one or more
weighing containers is described in the previous section). You then have the function “Sample” available
even if you have switched off the taring function in the menu (“Tara no”).
SAŸ≈PLE
Press and hold the “F” key until the balance displays the weighing
options. Select the function “Sample” by briefly pressing the ““” key
the required number of times.
Perform all further operations exactly as described in section 6.1; only
the step “Tare weighing container” is omitted.
Differential weighing software for METTLER TOLEDO G balances
18
6.4
Single and multiple differential weighings of the sample
A back weighing is the final step in every differential measurement. A differential weighing operation is
possible only if at least one memory position is available which already contains an initial weight.
=0000 g
Unload the weighing pan and then briefly press the “#” key to
set the display to zero.
Calling up differential weighing function
F
Press and hold the “F” key until the balance displays the weighing
options. Briefly press the ““” key repeatedly until the function “Differential weighing” is displayed.
dIFF
hold
Briefly press the “±” key to start the differential weighing operation.
Menu
Select memory position
F
○ ○ ○ ○ ○ ○
3 L≠≠≠J
If the automatic position selection is activated in the menu (“AUTO
POS.”, factory setting), the display shows the first memory position
which already contains an initial weight, but no final weight.
If you do not wish to accept the suggested memory position, you can
select another position by pressing the ““” key the required number
of times. Positions which already contain a final weight can not be
selected and are automatically skipped.
5 L≠≠≠J
○ ○ ○ ○ ○ ○
1 L≠≠≠J
5 L≠≠≠J
F
With manual position selection (“MAN POS.”), memory position 1
always appears and you must select the desired memory position for
the final weight yourself by briefly pressing the ““” key the required
number of times.
Multiple differential weighing operations
With manual position selection it is possible to select a memory position which already contains a final weight. In such a case, the existing
value will be overwritten by the new final weight. Such multiple differential weighing operations are marked on the record by an index
(see section 6.5). Up to 99 differential weighings are possible per
memory position.
Differential weighing software for METTLER TOLEDO G balances
19
Perform a back weighing
The flashing differential weighing symbol prompts you to place the
weighing container (if you are working with one) and the sample on
the pan. Place the container plus sample on the weighing pan.
5 L≠≠≠J
If the automatic weight detection is switched on (“A.det ON”, factory
setting), the final weight will be stored on stability.
1+5476 g
Menu
1+5476 g
‹
-1)61 %
If the automatic weight detection is switched off (“A.det OFF”), briefly press the “±” key to store the final weight.
The result of the differential weighing operation appears briefly in the
display.
Remove weighing container and sample
After the display of the differential weighing result, you are prompted to
remove the weighing container and the sample.
LiFt UP
If the automatic weight detection is switched on (“A.det ON”, factory
setting), the balance automatically detects the removal of the weighing sample.
If the automatic weight detection is switched off (“A.det OFF”), briefly press the “±” key after removing the weighing sample.
Close the differential weighing operation
After removal of the weighing container and the sample, the next
memory position is displayed (when the automatic position selection
is activated, the next position which does not contain a final value).
You can now …
6 L≠≠≠J
… perform another back weighing or …
Menu
Ÿ≈ donE
hold
=0000 g
… close the function “Differential weighing” by pressing and holding
the “±” key. Completion of the weighing process is confirmed in the
display and the balance automatically returns to the weighing mode.
Differential weighing software for METTLER TOLEDO G balances
20
6.5
Records
If your balance is connected to an optional printer from METTLER TOLEDO, you can print out a detailed
record of your differential weighing operations. Recording of the results supports work practices in compliance with ISO/GLP. In the menu you can specify defaults for the result recording. You can select whether you
wish to print out a long or a short record. In addition to the weighing data, the long record also contains the
time and date of each weighing, the sample identification and the result of the differential weighing in
grams. The menu also allows you to choose between a collective record and a continuous record. The
two records are described below in brief.
Collective record
---- RUECKWAEGUNG ---1
1
1
Diff.:
T
NE
NR
3
T
3
NE
3
NR
Diff.:
4
T
4
NE
4 [ 2] NR
Diff.:
2.6066 g
1.9520 g
0.3401 g
-82.58 %
===========
2.6070 g
19.3709 g
0.3382 g
-98.25 %
===========
2.6070 g
21.4677 g
0.4482 g
-97.91 %
===========
Unterschrift:
......................
-------- ENDE --------
You can print the collective record (factory setting) at any time by briefly pressing the “±” key when in the weighing mode. While the data
are being printed out, the display shows the message “Printout”. This
record contains all memory positions (in ascending order) with completed differential weighings. Memory positions which do not contain a value or which hold only tare and/or initial weights are not recorded. The following values are printed out for every memory
position:
–
–
–
–
Tara weight (“T”)
Net initial weight (“NE”)
Net final weight (“NR”)
Result of the differential weighing (“Diff. %” or “Abs. %”)
The illustration opposite shows an example of a collective record in
short form. In this example, as memory position 2 contains no or incomplete data the values have not been printed out in the record. The
index [2] next to the final value of memory position 4 indicates that
two back weighings (multiple differential weighing) have been performed.
Continuous record
-- TARA+EINWAEGUNG -1
T
2.6066 g
1
NE
4.8098 g
2
T
2.8532 g
2
NE
20.7121 g
---- RUECKWAEGUNG ---2
NR
4.1108 g
Diff.:
-80.15 %
===========
---- RUECKWAEGUNG ---1
NR
4.0832 g
Diff.:
-15.11 %
===========
In the continuous record, all weighing data (tare weight “T”, net initial
weight “NE”, Net final weight “NR”, differential weighing result “Diff.
%” or “Abs. %”) are automatically printed out immediately following
the particular weighing operation.
The illustration opposite shows the example of a continuous record in
short form. In this example, taring and weighing-in were first performed for memory position 1 then for position 2. The back weighings
were performed in the reverse order.
Note
Even if you have selected the continuous record in the menu, by pressing the “±” key you can always print out the collective record.
Differential weighing software for METTLER TOLEDO G balances
21
6.6
What if...?
If your balance suddenly returns to the weighing mode during a differential weighing operation, please
check for the presence of one of the following symptoms:
The balance returns abruptly to the weighing mode
=0000 g
You have waited more than 45 seconds before executing the required
action (e.g. placing the weighing container on the pan). The balance
automatically returns to the weighing mode. Any values already determined will be stored.
The balance displays the message “Data End” and returns to the
weighing mode
dAtA End
The balance can not find a memory position to which it can assign the
intended operation. This may be the case if no free memory position is
available or if you wish to back weigh a sample but no memory position is available which already contains an initial weight (in this case,
the balance has no possibility to assign the differential weighing operation to a memory position).
Please also note the list of error messages in the operating instructions
of your balance.
7.
Inquiry of the stored values via a PC
If your balance is connected to a PC by one of the interface cables available from METTLER TOLEDO (LCRS25 or LC-RS9) and you have an appropriate communications program, you can transfer the values
stored in the built-in database to the PC.
BW80
Enter the command shown opposite on your PC and then close it with
the carriage return key (ENTER or RETURN key). The contents of all
memory positions of the database which contain at least one value
will then be transferred to the PC. The end of the data transfer is shown
by the expression “EOB” (End Of Block) .
Differential weighing software for METTLER TOLEDO G balances
22
8.
Changing the back-up battery
The application cassette of the differential weighing software contains a back-up battery which ensures that
your settings and measured values remain stored even on power failure or after disconnection of the balance from the power supply. If you discover data loss, possibly the back-up battery is discharged. Change
the battery as follows:
• Remove the application cassette from the balance in reverse order
to the installation (see section 2).
Wa
rni
ng
battBy ch
will ery a angin
be ll da g
los ta
t
Batt
CR ery
203 siz
23 e
V
• Pull the battery compartment out of the application cassette and remove the old battery.
• Insert a new battery of the same type (CR2032, 3 V) and push the
battery compartment back into the application cassette.
• Insert the application cassette in the balance (see section 2).
• Level the balance as described in the balance operating instructions.
• Reenter all your settings (date, time and menu settings).
9.
Operating instructions in foreign languages
The operating instructions for the differential weighing software and the operating instructions for the
LC-BCR Bar-Code Reader are at present available in the following languages:
Language
Order number
German
English
French
Spanish
Italian
11780055
11780056
11780057
11780058
11780060
Please contact your METTLER TOLEDO dealer if you require operating instructions in another language.
Differential weighing software for METTLER TOLEDO G balances
23
10. Working with the bar-code reader
The optional METTLER TOLEDO LC-BCR Bar-Code Reader (order number 229 145) facilitates and speeds
up work with the differential weighing software and also opens up additional functions. However, the barcode reader can be operated only via a LocalCAN universal interface. Connection is possible with the following G balances: AG, PG, PG-S with LC-G option. In this section you will find directions on the proper
handling of the bar-code reader and a description of the available functions. You will find information on
practical work with bar codes in the instructions for operation of the differential weighing software with
the LC-BCR Bar-Code Reader. The instructions also include a bar-code keyboard, which makes work with
the bar-code reader more convenient and also allows the entry of alphanumeric characters.
10.1 Handling the bar-code reader
• Hold the reader like a ballpoint pen or a fountain pen.
• Move the reader across the bar code vertically to the surface at a moderate speed. When a code has been
read successfully, a short beep sounds as confirmation. The reading direction (from left to right or right to
left) is immaterial for the recognition.
• Ensure that the lens at the tip of the bar-code reader is always clean.
10.2 Bar-code commands
The command set of the bar-code reader supports 8 categories of commands and functions. In what follows, you will find a short overview of all bar-code commands arranged by category. Those commands
which are available only with the bar-code reader are explained in detail.
General balance settings
With these 3 commands you can match your balance to the ambient and operating conditions:
– Set vibration adapter
– Set weighing process adapter
– Select repeatability
General commands
This category comprises the following 4 commands:
– Reset balance: Resets all menu settings to the factory settings and clears the database (all individual
menu settings and all stored weighing data will be lost!)
– Clear database: Deletes all weighing data in the database (the menu settings are retained).
– Confirm/YES: With this command you accept the proposed option.
– End measurement process: Closes the current measurement process. The balance then returns to the
weighing mode.
– Abort/No: Abort procedure or reject the proposed option.
Differential weighing software for METTLER TOLEDO G balances
24
Commands for the adjustment (calibration)
You will find detailed information on adjustment (calibration) and testing in the operating instructions of
your balance. The following 5 commands are available:
–
–
–
–
–
Internal adjustment (calibration)
External adjustment (calibration)
Test with internal weight
Test with external weight
Select different weight
Settings for differential weighing
With these ten commands you match the differential weighing system to the way you work. These settings
correspond to those in menu options 8–12 described in section 5.3:
–
–
–
–
–
Switch automatic weight detection on or off
Automatic or manual position selection
Switch taring function on or off
Select short or long record
Select collective or continuous record
Function selection
With these 4 commands you can start the individual differential weighing functions:
–
–
–
–
Taring and weighing-in in a single cycle
Separate taring of the weighing container
Separate weighing-in of the sample
Back weighing of the sample
Transfer of the first tare to all memory positions
This command is available only via the bar code and only with the function “Separate taring”. If you call
up this command after taring of the first weighing container, the tare value will be transferred to all memory
positions. This command is very useful if you always work with weighing containers which all weigh the
same. The command can be executed only if no other tare values are stored (otherwise, you must first clear
the database with the appropriate command).
Direct selection of memory positions
The direct selection of memory positions is available only via the bar code. With the command “Go to
memory position” you tell the balance that you would like to select a memory position directly. With the
numeric commands (0…9) of the bar-code keyboard, you select the desired memory position. After entry
of the position number, you must initiate the selection with the “ã” command.
Sample identification (Sample IDs)
With these commands, which are available only via bar codes, you can assign any identification to each
memory position. The sample identifications are printed out on all records and thus facilitate the unambig-
Differential weighing software for METTLER TOLEDO G balances
25
uous assignment of the measured values to the individual samples. The following possibilities are available for the entry of sample IDs.:
– You can use the numbers of the 99 memory positions (1...99) as sample identification.
– You can use any bar codes as sample identification. You can also read such sample IDs later. This offers
you the opportunity to select the appropriate memory position for further work steps directly.
– You can use any character string (letters and numbers) as sample IDs. This allows you to enter comments on the individual samples.
Work with sample identifications is explained in the following section.
10.3 Working with sample identifications
The following examples illustrate the work with the different types of sample identifications.
Assign sample ID
For assignment of sample IDs to the individual memory positions, you have available the 3 possibilities
described above. These are explained individually in what follows.
Use numbers of the memory positions as sample IDs
=0000 g
*X35*
SEt donE
Important:
To execute this command, the balance must be in the weighing mode,
in other words no function (taring, weighing-in or back weighing)
must be selected!
This command is executable only if no sample identifications are
stored! If sample IDs are already stored and you still wish to execute
the command, you must first clear the database with the appropriate
command (this deletes all stored sample IDs).
Use the bar-code reader to initiate the command “Use numbers of the
memory positions as sample IDs”.
The balance briefly confirms the execution of the command and then
returns to the weighing mode.
Assign bar code as sample ID
Call up the desired function, e.g. “Separate taring”.
5 L___J
*X28*
To assign a bar code to the current memory position as sample ID,
proceed as follows:
Use the bar-code reader to initiate the command “Assign bar code as
sample ID”.
Differential weighing software for METTLER TOLEDO G balances
26
SEt Id
StorEd
The balance now prompts you to read in your own bar code (you will
find a list of the readable codes in the instructions you received with
the bar-code reader). This code is usually affixed directly to the weighing container, e.g. in the form of a sticker.
Run the bar-code reader over your own bar code. The balance briefly
confirms the storage of your code and you can then continue with your
work (in this example with taring) in the usual fashion.
Assign any character string as sample ID
Call up the desired function, e.g. “Taring and weighing-in”.
3 L___J
To assign any character string to the current memory position as sample ID, proceed as follows:
*X38*
Use the bar-code reader to initiate the command “Assign any character string as sample ID”.
SEt....
The balance now prompts you to read in the character string you wish
to use as a sample ID (if the current memory position already has a
sample ID, this will appear instead of the prompt shown opposite).
Mettler-
Use the bar-code reader to enter the desired character string. You will
find the bar-code keyboard and explanations on its use in the instructions for operation of the differential weighing software with the LCBCR Bar-Code Reader.
StorEd
As soon as you have entered the entire character string, close the entry. Storage of the sample ID is briefly confirmed and you can then
continue with your work (in this example taring and weighing-in) in
the usual fashion.
ID: Mettler-Toledo GmbH
20-Jan-1995
14:22
3
T
2.6070 g
The header of a record shown opposite illustrates how the sample ID is
printed out.
Reading sample ID
If you have used as bar code as a sample ID, you can read this code and hence select the associated
memory position directly to execute a further work step (e.g. separate weighing-in):
2 L≠õ≠J
Call up the desired function, e.g. “Separate weighing-in”. With automatic position selection, the balance automatically selects the first
memory position which does not contain an initial weight, in this
case memory position 2 (with manual position recognition, the balance always selects memory position 1).
Differential weighing software for METTLER TOLEDO G balances
27
5 L≠õ≠J
Run the bar-code reader across your own bar code. The balance now
selects the memory position assigned to the code directly (in this example position 5).
You can now continue with your work (in this example with weighingin) in the usual fashion. You can also read in your own code for direct
selection of the memory positions associated with other steps (e.g.
back weighing).
Deleting sample ID
To delete the sample identification of a particular memory position, proceed as follows:
1 L___J
5 L___J
*X00*
CLEAr Id
*X04*
Ensure that the manual position selection is switched on and select
any function (e.g. taring) to enter the differential weighing mode.
Select the memory position whose sample ID you wish to delete. If
you have selected a bar code as a sample ID, read in the bar code
and the balance selects the corresponding position. If you have used
memory position numbers or a character string as a sample ID, you
must select the position with the command “Go to memory position”
Use the bar-code reader to initiate the command “Delete sample ID”.
The balance asks whether you really wish to delete the sample identification number.
Execute the bar-code command “Confirm/YES” to delete the sample
identification number (if you do not wish to delete the number, select
the command “Abort/No” instead).
The balance confirms deletion of the sample identification number.
CLEArEd
10.4 Error messages in work with the bar-code reader
The error messages which can appear during work with the bar-code reader are listed in the instructions
for operation of the differential weighing software with the LC-BCR Bar-Code Reader.
To protect your METTLER TOLEDO product's future:
METTLER TOLEDO Service assures the quality, measuring
accuracy and preservation of value of all METTLER TOLEDO
products for years to come.
Please send for details about our attractive terms of service.
Thank you.
P11780069
Subject to technical changes and to the availability of the
accessories supplied with the instruments
Printed on recycled paper. Because we care.
© Mettler-Toledo GmbH 1998
11780069A Printed in Switzerland 9807/2.12
Mettler-Toledo GmbH, Laboratory & Weighing Technologies, CH-8606 Greifensee, Switzerland
Phone+41-1-9442211,Fax+41-1-9443060,Internet:http://www.mt.com
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