Mettler Toledo AT Balances, AT20, AT201, AT261, AT460 Operating Instructions Manual
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*P11780209*
Subject to technical changes and to the availability
of the accessories supplied with the instruments.
© Mettler-Toledo GmbH 1998 11780209A Printed in Switzerland 9807/2.12
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
AT balances
Operating instructions METTLER TOLEDO AT balances
Thank you for purchasing a METTLER TOLEDO AT analytical balance.
The AT balances combine a wide range of weighing and setting options with an exceptional ease of operation.
Please read these operating instructions through carefully so that you can utilize all possibilities offered by your AT balance to the
full. These operating instructions also offer valuable support in the form of a glossary and an index.
The present operating instructions apply to all METTLER TOLEDO balances of the AT series. As the various models have different
performance characteristics, however, special mention is made in the text where this is important for the operation.
Please read through the enclosed booklet “Weighing the right way”. It is intended as a supplement to these operating instructions
and contains additional important tips and informations.
If you fold out this page, you will have an overview of your AT balance that shows you all features at a glance.
Safety has priority
– It is essential you consult the instructions in section 1.2 regarding putting your new balance into
operation.
– The AT balances may be operated when connected to receptacle outlets with a ground connection.
– The AT balances must not be operated in hazardous surroundings.
– Never open the balance, it contains no parts which can be serviced, repaired or changed by the user.
In the unlikely event you experience problems with your balance, please contact the responsible
service facility.
1 Key «Re-Zero», «Set», «On/Off»
2 Key «0.1/0.01 mg» (with dual-range balances only),
«Cancel»
3 Key «Menu», «Configuration»
4 Key «Select 1»
5 Key «Select 2»
6 Key «Print»
7 Key
8 Glass draft shield
9 Coupling element
10 Coupling element
11 Coupling element
12 Coupling element
13 Door handle
14 Door drive handle
15 Weighing pan
16 Draft cover
17 Level
18 Connection for foot or hand switch and electrical
contacts
19 Connection for data interface
20 Connection to overhead display
21 Plug-in slot for program cassette
22 Program cassette, protection of the configuration
parameters
23 Connection for AC adapter
24 Screw feet
25 Digital display (VFD or LCD)
26 Status indicators
27 Weight units
28 DeltaTrac®
Operating instructions METTLER TOLEDO AT balances
““
“
““
⇔⇔
Contents
Page
1 The AT smooths the way .............................................................. 1
1.1 The new weighing feeling................................................................ 1
1.2 Preparing your AT ........................................................................... 2
1.3 Weighing made simple .................................................................... 5
2 Your AT - a balance with extreme ease of operation ................. 8
2.1 A glass draft shield with unlimited possibilities................................ 8
2.2 The Mettler DeltaTrac - an informative display ............................. 11
2.3 Is your AT a Mettler DeltaRange balance? ................................... 11
2.4 How you can weigh in the coarse and fine range ......................... 12
3 Individual adaptation of your AT ............................................... 14
3.1 What is the menu? ........................................................................ 14
3.2 How to adapt your AT to different types of weighing..................... 17
3.3 How to adapt your AT to the local conditions ................................ 19
3.4 How to switch off the fully automatic door function ....................... 20
4 Additional possibilities in the configuration register .............. 22
4.1 What is the configuration register?................................................ 22
4.2 How is the configuration register used? ........................................ 23
4.3 In the first sector you return to the factory setting ......................... 26
4.4 The second sector offers you numerous adaptation
possibilities .................................................................................... 27
4.5 In the third sector you select the weight units
and additional settings .................................................................. 32
4.6 In the fourth sector the AT reveals itself as a balance
ready to communicate ................................................................... 35
4.7 Print out the current configuration ................................................. 38
4.8 How to protect your settings against inadvertent
changes......................................................................................... 39
5 Special applications and functions of your
Page
AT balance ................................................................................... 40
5.1 Your AT can work with two weight units........................................ 40
5.2 Your AT also weighs in percent and displays plus/minus
deviations ...................................................................................... 41
5.3 Should your AT count pieces? ...................................................... 43
5.4 How to trigger the adjustment manually ........................................ 46
5.5 How to check whether the balance is still
adjusted correctly .......................................................................... 49
5.6 How to print out the weighing result .............................................. 51
5.7 Your AT can also be remote controlled ......................................... 52
6 Important information regarding your AT................................. 53
6.1 The AC adapter offers you various installation
options........................................................................................... 53
6.2 If you change the location of your AT............................................ 55
6.3 A well maintained balance is a joy forever .................................... 56
6.4 What your AT brings with it ........................................................... 57
6.5 Additional information and accessories for your
AT balance .................................................................................... 57
7 Any questions? ........................................................................... 58
7.1 What happens if the weight display is unstable? .......................... 58
7.2 How can the weighing speed be increased?................................. 61
7.3 What happens if...? ....................................................................... 62
7.4 What does this error message mean? .......................................... 66
7.5 What does this term mean? .......................................................... 67
7.6 How are weight units converted? .................................................. 78
7.7 Where will I find details of...? ........................................................ 80
Technical specifications ................................................................ 84
Operating instructions METTLER TOLEDO AT balances
Operating instructions METTLER TOLEDO AT balances
Printed on 100 % chlorine-free Paper, for the sake of our environment.
Operating instructions METTLER TOLEDO AT balances
1 The AT smooths the way
1.1 The new weighing feeling
Your AT balance offers a wide range of
functions, yet is simple to operate.
For example, there is no need whatever to concern yourself with the
adjustment - your AT performs the
adjustment fully automatically. Your AT
is equipped with an adjustable glass
draft shield with a fully automatic door
function. Just two examples to give you
a preview of the full range of equipment
of your new balance.
Your AT balance is distinguished
primarily, however, by its user friendliness. You set the balance up, connect
it to the power supply and after a few
minutes warm-up time you can immediately start weighing. You thus obtain
your first weighing result in the shortest
time possible.
The AT offers you the operating convenience and the complete range of
options you expect from a top-quality
analytical balance. There is, however,
no need for you to grapple at the
moment with functions you will not
need until later.
In this first section you will find out how
simply you can start up your AT and
perform normal weighings.
1
2
1.2 Preparing your AT
If you fold out the front fold-out, you
have in front of you an immediate
overview of all general illustrations
at a glance.
You need undertake the following
operations only on first-time installation
and each time you change the balance
location.
Select a suitable location
Your AT expresses its thanks for an
optimum location by providing you with
excellent weighing results:
- Firm, vibration-free location, as level
as possible
- No direct sunlight
- No extreme temperature fluctuations
- No excessive drafts (e.g. through
powerful air aWnditioning)
Additional tips and information regarding an optimum location can be found
in the METTLER TOLEDO brochure “Weighing the right way”, which is
enclosed with your balance.
Operating instructions METTLER TOLEDO AT balances
Operating instructions METTLER TOLEDO AT balances
How you can transport the balance
When you position your AT balance at
its location, please note the following:
To transport the balance, hold it at the
front under the display and at the rear
beneath the balance housing. Never lift
your AT using the draft shield or the
«Re-Zero» key!
Mount the draft cover and level the
balance
- Place the draft cover 16 supplied
separately in position. When positioning the draft cover, ensure that it
is not touched by the weighing pan,
which must move freely in its
recess. If necessary, turn the
weighing pan to the correct
position. The draft cover is useful
primarily for balances with the
semimicro range (readability 0.01
mg). In many cases it need not be
installed in weighings in the
analytical range (readability 0.1
mg).
As an option, semimicro balances
can be equipped with an additional
inner draft shield whose installation
is described in the enclosed
mounting instructions.
- Turn the two screw feet 24 at the
rear of the balance housing until
the air bubble is in the middle of
level 17.
3
4
Prepare the glass draft shield
The draft shield of your AT balance
comprises several parts which can be
combined in a number of ways using
the coupling elements. To preclude
transport damage, these coupling
elements are not locked in position
when shipped. Connect the individual
parts of the draft shield as follows:
- Pull all doors of the draft shield and
the opposing door holder 14 forwards as far as possible.
- Push the two upper coupling
elements 9 and 10 upward and the
two lower coupling elements 11 and
12 downward until they lock.
When in this position, the whole draft
shield opens. Additional combination
possibilities of the individual doors are
described in Section 2.1.
STANDBY
Connect your AT to the power
supply
- Connect the AC adapter supplied to
connection socket 23 at the rear of
your AT balance and then to the
power supply.
- The AC adapter can either be
placed on the bench, attached to
the balance or, to save space, be
mounted on the wall. The AC adapter holder and the installation set
with dowels and screws are used
for this. Appropriate details are
given in Section 6.1.
After connection, your AT balance is
on standby and ready for weighing
after a brief warm-up time of about 5
minutes. (See also Technical
specifications page 84).
Operating instructions METTLER TOLEDO AT balances
AT201
Max 205 g d = 0.1 mg
Operating instructions METTLER TOLEDO AT balances
pro
FACT
METTLER TOLEDO
1.3 Weighing made simple
- By pressing the «On/Off» key you
switch your AT from standby to the
pro
FACT
Max 205 g d = 0.1 mg
AT201
Cancel
0.1/0.001 mg
Configuration
Menu
χ
⇔
Set Re-Zero On/Off
METTLER TOLEDO
METTLER
Set your balance to zero (taring):
Print
Select 2Select 1
χ
⇔
- If you wish to tare a container, place
it on the balance.
weighing mode. The balance now
performs a brief self-test and all
display segments light up briefly.
- Press the «Re-Zero» key. The fully
automatic door function closes the
draft shield.
- If the draft shield is open, you can
close it by pressing one of the two
⇔
keys .
Your AT balance is fitted with a fully
automatic door function, which ensures
that the draft shield is always open or
closed at the right time. Section 3.4
describes how you can switch off this
automatic mechanism. On completion
of the self-test, this function opens the
draft shield completely automatically.
- - - - - -
Zeroing of the display (taring) is automatic. While the zeroing is in progress
and the horizontal segments appear in
the display, you can abort the process
by briefly pressing the «Re-Zero» key
again.
5
6
0.0000
METTLER TOLEDO
5.34678
5.34678
Print
Select 2
On/Off
As soon as the warning beep sounds,
zeroing of the balance is complete and
the fully automatic door function opens
the draft shield.
5.34678
g
- Read off the weighing result. The
result remains “frozen” on the
display for 5 seconds. This can be
recognized by the flashing circle
above the weighing unit. If the
balance is attached to a printer, the
weighing result is automatically
- Load the weighing sample and
press the «Print» key. The fully
automatic door function closes the
⇔
draft shield.
printed out.
With this automatic door function, your work steps in weighing
are reduced from 9 to 5! (You
don't have to open and close the
draft shield twice.)
It is possible that the warning beep
sounds during a weighing and the
adjacent symbol appears in the display.
Your AT balance uses this to show that
it would like to adjust itself. But there is
- The triangle symbol (print symbol)
and the circle symbol of the stability
detection (ASD) appear in the
display.
AUTOCALIN
0.3675
no need for you to interrupt your work
- When the symbol of the stability
detector (ASD) fades, the warning
beep sounds; the triangle symbol
also fades and the draft shield
opens automatically.
Note: You can also open and close
the draft shield with one of the keys
or by hand.
⇔
as the balance waits until you have not
carried out any weighings for a period
of about 5 minutes and then performs
the fully automatic self-adjustment
(proFACT). The symbol remains lit up
until the balance has adjusted itself or
until you trigger the adjustment by a
Operating instructions METTLER TOLEDO AT balances
Operating instructions METTLER TOLEDO AT balances
STANDBY
keystroke. Section 5.4 shows you how
to trigger the adjustment yourself.
- For switching off the balance, lift
up the «On/Off» key briefly from
below. This closes the draft shield
automatically if the fully automatic
door function is switched on. Otherwise, close the draft shield manually
to prevent the ingress of dust and
dirt.
After being switched off, the balance is
on standby. When it is switched on
again, it needs no warm-up time and is
in immediate operational readiness.
Some additional tips:
- If you have made a mistake during
weighing, there is no need to worry:
Simply switch your AT off and then
immediately on again. You will later
learn of other possibilities to bring
your AT to weighing readiness
again.
- You can also effect the zeroing
(taring) of the balance using the
foot or hand switch (available as
an accessory) attached to the
balance via connection 18. Operation with the foot switch leaves you
both hands free for loading your AT.
7
8
- If you ever have to disconnect your
AT from the power supply, first
switch it off by lifting up the «On/
Off» key. After the balance has
been reconnected, it is in the
standby mode and “
appears in the display.
After an unexpected power outage,
however, or if you have not
switched off your AT before disconnecting it from the power supply,
when power is restored again
“–
OFF
–” appears in the display.
When the «On/Off» key is now
pressed, in this case an extended,
internal self-test is first performed.
Here the model designation and the
software version are briefly displayed, and all display segments
light up for a short space of time.
STANDBY
”
2 Your AT - a balance with extreme
ease of operation
2.1 A glass draft shield with unlimited possibilities
With the glass draft shield you can
adapt your AT balance to the local
conditions (principally drafts), to your
individual style of weighing, to the size
of the tare containers, and to the type
of weighing and loading.
The fixed bars of a traditional draft
shield prevent access to the weighing
chamber.
Operating instructions METTLER TOLEDO AT balances
Operating instructions METTLER TOLEDO AT balances
The draft shield of the AT balance has
no fixed bars and the weighing chamber is freely accessible. Your AT is thus
also especially well suited to automatic
loading.
The left, right and upper doors of the
draft shield can be combined in any
way and hence matched to your
weighing needs by means of the
coupling elements 9 to 12.
Try out various combinations by shifting
the coupling elements upward and
downward. For the manual door
operation the coupling elements 11 and
12 must always be disengaged (top
position)!
When small weighing samples have
to be loaded, we advise you to open
only one of the two side doors. Your
balance then operates quicker since
the disturbing air currents are less
than when more doors of the draft
shield are open.
You can operate the draft shield
manually in the traditional manner.
9
10
AT201
Cancel
0.1/0.01mg
Configuration
Menu
Select 1
Pro
FACT
METTLER TOLEDO
Print
Select 2
On/Off
⇔
Max 205 g d = 0.01 mg
⇔
Set
The semiautomatic operation can be
effected either with the left or the right
⇔
key. In this case, the draft shield is
⇔
opened and closed by the motor.
A further tip: You will obtain the most
accurate results in the quickest possible manner if you close the draft shield
completely during weighing! If this is
not possible, for instance with bulky
In certain applications, such as zeroing
(taring) of the balance, the draft shield
opens and closes fully automatically
as you already know from your first
weighing. Manual or semiautomatic
weighing samples, you should combine
the doors of the draft shield such that
the greatest possible part of the draft
shield remains closed during the
weighing.
operation is also possible when the
fully automatic door function is operative. The fully automatic door function
primarily facilitates work with the single
or twin foot switch. Section 3.4 shows
you how to switch off the fully
So that excellent weighing results can
also be achieved fast under difficult
weighing conditions, you can also use
an inner draft shield.
(Order number 210270)
automatic door function.
For loading the balance, open only
as many doors as necessary. With
relatively small weighing samples or
rather small tare containers, it is
normally sufficient to open a single
door. This lessens the influence of
drafts and speeds up the weighing
process.
Operating instructions METTLER TOLEDO AT balances
Operating instructions METTLER TOLEDO AT balances
24.083
98.215
2.2 The DeltaTrac® - an
informative display
The DeltaTrac® 28 is a supplement to
the digital display 25. It provides you
with a pictorial representation of the
weighing range in use and that still
remaining. The dynamics of a
weighing process can be followed on
the DeltaTrac® extremely well. Simply
observe the DeltaTrac® during a
weighing and you will immediately
understand its function.
The DeltaTrac® gives you a new feel
for weighing, even with special
applications, for example in repeated
weighing in to a specified target value
and in percent weighings. You will find
further details in Section 5.2.
2.3 Is your AT a DeltaRange® balance?
The AT261 and AT460 models are
DeltaRange® balances. They have a
ten times more accurate, movable fine
range, which shows an additional
decimal place. Thus, for example, the
AT261 has a resolution of 0.1 mg over
the entire weighing range and a
movable fine range with a resolution of
0.01 mg.
This fine range can be called up at any
point in the whole weighing range as
often as liked.
The movable fine range covers 62 g for
both models. Each time you set the
balance to zero (tare) with the «ReZero» key, the fine range is switched in.
If the span of the fine range is
exceeded, the balance automatically
switches into the coarse range. The fine
range can be called up again by
rezeroing the balance once more using
the «Re-Zero» key.
11
12
Note:
This ten times more accurate movable
fine range also remains active in
differential weighing.
2.4 How you can weigh in the coarse and fine range
Semimicro and DeltaRange® balances
of the AT series are equipped with a
switch key which you can use to switch
from the coarse range to a ten times
more accurate fine range.
The AT thus allows you to work in the
range best suited to your needs.
If, for example, instead of a high
resolution you need a stable weighing
result as rapidly as possible, you switch
from the fine range to the course range
using the switch key. This makes your
AT very fast and the weighing results
are extremely stable.
You can thus also disable the
DeltaRange® if you do not need it.
Operating instructions METTLER TOLEDO AT balances
Operating instructions METTLER TOLEDO AT balances
12.6439
You have the following selectable
ranges available:
Balance Coarse Fine Key
range range
AT20 0.01 mg 2 µg 10 / 2 µg
AT201 0.1 mg 0.01 mg 0.1 / 0.01 mg
AT261 0.1 mg 0.01 mg 0.1 / 0.01 mg
AT460 1 mg 0.1 mg 1 / 0.1mg
With the «0.1/0.01 mg» key (e.g. with
AT201/AT261 DeltaRange®) you can
switch between the coarse and the fine
range:
- The balance is measuring in the
coarse range
Max 205 g d = 0.01 mg
AT201
Cancel
0.1/0.01mg
Configuration
Menu
Select 1
⇔
Set
12.64387
Pro
FACT
- Press the «0.1/0.01 mg» key (e.g.
with AT201/AT261 DeltaRange®)
and …
- …the balance operates in the ten
times more accurate fine range.
- By pressing the «0.1/0.01 mg» key
again, you can return to the coarse
range.
13
14
3 Your AT is an adaptable balance
For the optimization of your weighing
results and adaptation to your weighing
needs, the AT offers you additional
setting options. You undertake these
adaptations in the menu, which you will
now be introduced to.
You can set additional parameters in
the second menu tree of your AT, the
configuration register (section 4).
3.1 What is the menu?
In the menu you match your balance to
the local conditions and to the weighing
tasks. The menu contains various
adaptation possibilities, the menu
options, which in turn offer different
setting options.
AT201
Cancel
0.1/0.01mg
Configuration
Menu
Select 1
Set
Max 205 g d = 0.01 mg
⇔
Overview of the menu functions:
- reference weight in %
- reference weight in pieces
- adjustment
- weighing process adapter
- vibration adapter
- fully automatic door function
You will find a detailed overview of
the menu on pages 82 and 83.
In addition, you can also perform several operational steps in the menu for
special applications (percent weighing
and piece counting). Section 5 of these
operating instructions provides you with
more information.
Pro
FACT
We encourage you to experiment with
the menu to familiarize yourself with it.
You need have no worries here: By
pressing the «Cancel» key you can
return to the weighing mode at any
time without changing the stored
settings!
Operating instructions METTLER TOLEDO AT balances
Operating instructions METTLER TOLEDO AT balances
AT201
Cancel
0.1/0.01mg
Configuration
Menu
Select 1
⇔
Set
AT201
Cancel
0.1/0.01mg
Configuration
Menu
Select 1
⇔
Set
Max 205 g d = 0.01 mg
Max 205 g d = 0.01 mg
You perform your weighings in the
weighing mode, the operational mode
of your balance. Weighing mode and
menu are separate. By pressing and
holding the «Configuration» key you
can call up the configuration register.
You can also select the different menu
AT201
Cancel
0.1/0.01mg
Configuration
Menu
Select 1
Set
Max 205 g d = 0.01 mg
⇔
Pro
FACT
«Set» key
- Confirmation of your selection and
return to the weighing mode. The
selected settings are stored and
remain so even after the balance
has been switched off.
options and setting possibilities with
keystrokes.
«Menu» key
Pro
FACT
- Selection of the menu by briefly
AT201
0.1/0.01mg
Configuration
pressing the key in the weighing
mode
Cancel
Menu
Select 1
Set
Max 205 g d = 0.01 mg
⇔
Pro
FACT
«Cancel» key
- Exit the menu and return to the
weighing mode without any chan-
ges being made. If you have made
a wrong selection, you can leave
the menu at any time by pressing
the «Cancel» key. You are then in
- Selection of the individual menu
options
the weighing mode again without
any change in the settings.
Instead of pressing the «Cancel»
key, you can naturally switch the
scale off and then on again.
Pro
FACT
«Select 1» key
- Selection of the setting in a menu
option
15
16
CAL Int
door Auto
By repeated pressing of the «Menu»
key, all available menu options appear
in the display in succession:
- proFACT
fully automatic adjustment and
linearization
- Adaptation to the type of weighing
(weighing process adapter)
- Adaptation to the local conditions
(vibration adapter)
- Automatic door function of the draft
shield
A complete overview of the menu can
be found on the pages 82 and 83.
Some additional tips:
- Not all menu options are constantly
or exactly displayed in the form
shown; some of them, e.g. the
setting of reference weights (“Set
100%”) depend on additional
settings in the configuration register,
which we will introduce you to in
Section 4 of these operating instructions.
- If you are in the menu and press no
key for about 1 minute, the AT
returns automatically to the
weighing mode. Any changes in
the settings made up to this point
are ignored in this case.
Operating instructions METTLER TOLEDO AT balances
Operating instructions METTLER TOLEDO AT balances
- In the following 3 sections you will
get to know the three menu options
(weighing process adapter, vibration
adapter and automatic door function) in detail. The additional setting
options for special applications
(weighing in reference weights for
percent weighings or piece counting
and the adjustment) will be introduced in Section 5.
AT201
Cancel
0.1/0.01mg
Configuration
Menu
Select 1
Set
AT201
Cancel
0.1/0.01mg
Configuration
Menu
Select 1
Set
Max 205 g d = 0.01 mg
⇔
Max 205 g d = 0.01 mg
⇔
3.2 How to adapt your AT to
different types of weighing
Your AT balance can be matched to
different types of weighing (fine dispensing, absolute weighing, etc.) very
simply. It is equipped for this purpose
with the so-called weighing process
Pro
FACT
Pro
FACT
adapter, which can be set in the menu.
- Select the menu by pressing the
«Menu» key briefly.
- Press the «Menu» key repeatedly
until the drop symbol of the weighing process adapter appears in the
display.
- Select the appropriate setting with
the «Select 1» key:
17
18
This is the universal setting
suitable in principle for all types of
weighing. This setting is preset in
the factory.
The position absolute weighing is
suitable for the rapid checking of a
weight. During the weighing in, the
last decimal place is suppressed.
If you wish to employ fine dispensing (weighing in) of a fine
powder or small amounts of liquid,
select the weighing in position.
This provides a continuous display
of all decimal places, and the weight
increase can thus be followed
easily.
AT201
Cancel
0.1/0.01mg
Configuration
Menu
Select 1
Set
Max 205 g d = 0.01 mg
⇔
In this position the drop symbol is
invisible, the weighing process
adapter is switched off. This setting
is suitable only for special appli-
cations in which not only the final
result but also the dynamics of the
weighing process are of interest, for
example the recording of weight
changes due to evaporation against
time.
Pro
FACT
- When you have selected the appro-
priate setting, press the «Set» key.
This makes the settings active
immediately, and the balance
returns to the weighing mode.
Operating instructions METTLER TOLEDO AT balances
Operating instructions METTLER TOLEDO AT balances
3.3 How to adapt your AT to the local conditions
For all weighings, we advise you
always to open the draft shield only as
far as necessary. You thus achieve
stable weighing results as quickly as
possible.
If, despite a closed draft shield, no
stable weighing results are found, the
cause could lie with unfavorable local
conditions such as vibrations. Very
minor, hardly noticeable vibrations of
the weighing table are usually involved.
AT201
Cancel
0.1/0.01mg
Configuration
Menu
Select 1
⇔
Set
AT201
Cancel
0.1/0.01mg
Configuration
Menu
Select 1
Set
Max 205 g d = 0.01 mg
Max 205 g d = 0.01 mg
⇔
With the so-called vibration adapter
your AT balance can be matched in the
menu to the local conditions.
Pro
FACT
- Select the menu.
- Press the «Menu» key repeatedly
until the wave symbol of the vibration adapter appears in the display.
Pro
FACT
- Select the appropriate setting with
the «Select 1» key:
19
20
AT201
Cancel
0.1/0.01mg
Configuration
Menu
Select 1
⇔
Set
Max 205 g d = 0.01 mg
This setting is suitable for normal
ambient conditions; the balance
operates at moderate speed in this
case. This position is set in the factory.
Note:
A further reason for an unstable display
of the weighing result could lie, for
instance, with electrostatic charging of
the weighing sample or the container.
You will find additional information
regarding this in Section 7.1.
This setting is suitable for work in
unquiet surroundings. The balance
operates more slowly, but is less
sensitive to external disturbances.
3.4 How to switch off the fully automatic door function
This setting is suitable for very quiet
and stable surroundings. The balan-
ce operates very rapidly, but is relatively sensitive to external disturbances.
Pro
FACT
- When you have selected the appropriate setting, press the «Set» key.
The chosen setting then immediately becomes active, and the balance
returns to the weighing mode.
You are already familiar with the
convenient automatic door function of
your AT balance from your first weighing. When the automatic door operation
is switched on, the draft shield closes
automatically after the «Re-Zero» key
(zeroing/taring) or the «Print» key
(printout of the weighing result, see
Section 5.6) has been pressed. As
soon as the weight display is stable,
the draft shield is reopened for the next
weighing operation (e.g. weighing in,
loading the balance). The draft shield is
thus always in the correct position for
the next weighing process. Routine
Operating instructions METTLER TOLEDO AT balances
Operating instructions METTLER TOLEDO AT balances
work is particularly facilitated by this
automatic operation. It is also useful in
the percent weighing (Section 5.2) and
piece counting (Section 5.3) applications. When the twin foot switch (see
brochure is used, the automatic operation leaves both hands free for weighing in.
If you wish to operate the draft shield
manually or semiautomatically via the
two keys, however, you can switch
⇔
off the automatic door operation:
Pro
Max 205 g d = 0.01 mg
Cancel
Menu
Select 1
FACT
⇔
Set
AT201
0.1/0.01mg
Configuration
door Auto
Pro
Max 205 g d = 0.01 mg
Cancel
Menu
Select 1
FACT
⇔
Set
AT201
0.1/0.01mg
Configuration
- Select the menu.
- Press the «Menu» key repeatedly
until the adjacent display appears.
- Using the «Select 1» key, you can
now switch the automatic door operation off and on again:
21
22
door Auto
door Std
Pro
Max 205 g d = 0.01 mg
Cancel
Menu
Select 1
FACT
⇔
Set
AT201
0.1/0.01mg
Configuration
Fully automatic door function
switched on
Fully automatic door function
switched off
- Activate the chosen setting by
pressing the «Set» key and you will
be returned once again to the
weighing mode.
4 Additional possibilities with your AT
In addition to the menu, the AT offers
you further, very specific adaptation
possibilities. You perform these adaptations in the configuration register,
which we will introduce you to in the
following section.
4.1 What is the configuration register?
The configuration register is divided
into four sectors in which you can vary
SEtt INGS
SCALE
the following settings:
- Operational setting
• Reset
- Basic settings
• ASD, automatic stability detector
• Readability
• Readability in the semimicro
range
• Autozero
• proFACT, adjustment and
linearization
Operating instructions METTLER TOLEDO AT balances
Operating instructions METTLER TOLEDO AT balances
Unit
Int -FACE
- Weighing units
weighing unit 1
weighing unit 2
status indicator
beeper
- Interface
data transmission mode
data transmission rate
parity
transmission protocol
end-of-line mode
You will find further details on the
adjustment parameters on pages 82
and 83.
4.2 How is the configuration register used?
Hold the short-form operating
instructions in your hand. You will
then have the complete configuration register at a glance in front of
you.
We would like to encourage you to
experiment with the configuration
register to familiarize yourself with it.
You need have no worries on this
score: By pressing the «Cancel»
key, you can return at any time to
the weighing mode without any of
the stored settings being altered!
23
24
AT201
Cancel
0.1/0.01mg
Configuration
Menu
Select 1
Max 205 g d = 0.01 mg
⇔
Set
AT201
Cancel
0.1/0.01mg
Configuration
Menu
Select 1
⇔
Set
Pro
FACT
Max 205 g d = 0.01 mg
METTLER TOLEDO
Select 2
On/Off
Pro
FACT
By pressing and holding the
«Configuration» key, you call up the
Print
configuration register.
⇔
⇔
You select the different
- sectors («Configuration» key)
- parameters («Select 1» key)
- settings («Select 2» key)
by simply pressing the appropriate key.
In contrast to the menu, you also need
the «Select 2» key for operation of the
configuration register.
«Configuration» key
Selection of the configuration
register from the weighing mode by
pressing and holding the key
(about 5 seconds). You are then
already in the first sector.
Selection of the individual sectors
in the configuration register with a
brief keystroke. After the last sector
you are returned to the first.
Max 205 g d = 0.01 mg
AT201
Cancel
0.1/0.01mg
Configuration
Menu
Select 1
⇔
Set
METTLER TOLEDO
Max 205 g d = 0.01 mg
AT201
Cancel
0.1/0.01mg
Configuration
Menu
Select 1
⇔
Set
Pro
FACT
Print
Select 2
On/Off
Pro
FACT
«Select 1» key
Selection of the parameters in a
sector. After the last parameter in
this sector you are returned to the
first.
«Select 2» key
Selection of the desired setting of a
⇔
parameter. After the last setting of a
parameter, you are returned to the
first.
«Set» key
Confirmation of your selection and
return to the weighing mode. The
selected settings are stored and
remain so even after the balance
has been switched off or disconnected from the power supply.
Operating instructions METTLER TOLEDO AT balances
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