Mettler Toledo HR73, HG53-P, HG53, HR73-P Operating Instructions Manual
Operating instructions
HR73 and HG53 Moisture Analyzers
HR73-P and HG53-P Moisture Analyzers
Menu
Reset
S
to
p
O
/T
S
tart
on
off
%
Halogen M
oisture Analyzer
HG53
Menu
A...Z
Stop
O/T
Start
on
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Reset
Stat.
ID
Code
Journal
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7
8
9
4
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6
1
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Halogen Moisture Analyzer
HR73
Halogen Moisture Analyzer
HR73
Stat.
ID
789
456
123
0.
A...Z
Start Stop
0/T
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Menu
Reset
Journal
on
off
Code
HR/HG 01
Overview of your HR73 Halogen Moisture Analyzer
50 48 46
454749
53545556
39
40
41
42
43
44
37 3834 363533
58
57
52 51
60 60
11
11
14
13
12
29
33
24
23
22
21
20
5961
3027 28
1
2
3
4
6
7
10
1516171819
32
25
3126
8
5
9
Display, controls and connections of your HR73
No. Designation Info s.
section
1 Display all
2 Keypad all
3 Draft shield 2.3
4 Automatic sample chamber 2.6
5 Sample pan holder 2.3
6 Dryer unit 7.6
7 Inspection window and vent 6.3
8 Level indicator (level) 2.3
9 Printer cover 7.2
10 Built-in printer (option) 7.5
11 Leveling screw 2.3
12 Display of drying temperature 4.3
13 Display of drying time 4.4
14 Display of unit (percent or grams) 4.5
15 Weighing-in aid 4.7/6.13
16 Function display “Print interval” 4.6
17 Function display “Display mode” 4.5
18 Function display “Drying program” 4.2
19 Function display “Switch-off criterion” 4.4
201 Dialog display (measured values, menu
dialog, text entry, etc.) all
21 Menu symbol 6
22 Method symbol 5
23 Symbol for record comment 4.9
24 Statistics symbol 5.6
25 Stability detector 8.2/8.3
26 Symbol for calculated result 5.5
27 Symbol for automatic operating mode of
the automatic sample chamber 6.9
28 Symbol for keypad locking
(parameter reset protection) 6.11
29 Symbol for manual operating mode of the
automatic sample chamber 6.9
30 Symbol for audio signal device (beeper) 6.10
No. Designation Info s.
section
31 Symbol for test measurement 4.4
32 Status display (user guide) 2.6
33 Key «on/off» 2.6
34 Function key «Switch-off criterion» 4.4
35 Function key «Drying program» 4.2
36 Function key «Display mode» 4.5
37 Function key «Print interval» 4.6
38 Key «Target weight» (weighing-in aid) 4.7/6.13
39 Key «ID» (method selection) 5.2
40 Key «Stat.» (statistics) 5.6
41 Key «Menu» 6
42 Key «Reset» 2.6
43 Key «Journal» 5.5
44 Key «Code» (record comment) 4.9
45 Key «Accept entry» all
46 Key «A...Z» (alphanumeric entry) 4.9/5.3
47 Key «Scroll down» 2.5
48 Key «Scroll up» 2.5
49 Key «Drying time» 4.4
50 Key «Drying temperature» 4.3
51 Numeric keypad 4.1
52 Key «Delete» 4.1
53 Key «Stop» (stop drying) 4.8/4.9
54 Key «Tare» (zero) 2.6
55 Key «Open/close auto sample chamber» 2.6
56 Key «Start» (start of drying) 2.6
57 Key «Print» 4.8/6.1
58 Key «Paper feed» 4.8
59 Power supply receptacle 2.3
60 Power line fuses 7.3
61 LocalCAN universal interface port 9.2
Halogen Moisture Analyzer
HG53
Start Stop
0/T
Menu
Reset
on
off
%
HR/HG 01
Overview of your HG53 Halogen Moisture Analyzer
40414243
3230 3129
47 47
11
11
14
13
12
25
4648
2623 24
1
2
3
4
6
7
10
15161718
28
2722
8
5
9
21
33
20
19
33
34
39 37
3638 35
45
44
Display, controls and connections of your HG53
No. Designation Info s.
section
1 Display all
2 Keypad all
3 Draft shield 2.3
4 Automatic sample chamber 2.6
5 Sample pan holder 2.3
6 Dryer unit 7.6
7 Inspection window and vent 6.3
8 Level indicator (level) 2.3
9 Printer cover 7.2
10 Built-in printer (option) 7.5
11 Leveling screw 2.3
12 Display of drying temperature 4.3
13 Display of drying time 4.4
14 Display of unit (percent or grams) 4.5
15 Weighing-in aid 4.7/6.13
16 Function display “Print interval” 4.6
17 Function display “Display mode” 4.5
18 Function display “Switch-off criterion” 4.4
19 Dialog display (measured values, menu,
dialog, text entry, etc.) all
20 Menu symbol 6
21 Stability detector 8.3
22 Symbol for calculated result 5.5
23 Symbol for automatic operating mode of
the automatic sample chamber 6.9
24 Symbol for keypad locking
(parameter reset protection) 6.11
25 Symbol for manual operating mode of the
automatic sample chamber 6.9
26 Symbol for audio signal device (beeper) 6.10
27 Symbol for test measurement 4.4
28 Status display (user guide) 2.6
No. Designation Info s.
section
29 Key «on/off» 2.6
30 Function key «Switch-off criterion» 4.4
31 Function key «Display mode» 4.5
32 Function key «Print interval» 4.6
33 Key «Menu» 6
34 Key «Reset» 2.6
35 Key «Accept entry» all
36 Key «Scroll down» 2.5
37 Key «Scroll up» 2.5
38 Key «Drying time» 4.4
39 Key «Drying temperature» 4.3
40 Key «Stop» (stop drying) 4.8/4.9
41 Key «Tare» (zero) 2.6
42 Key «Open/close auto sample chamber» 2.6
43 Key «Start» (start of drying) 2.6
44 Key «Print» 4.8
45 Key «Paper feed» 4.8
46 Power supply receptacle 2.3
47 Power line fuses 7.3
48 LocalCAN universal interface port 9.2
Contents
6
Contents
1. Getting to know your Moisture Analyzer ............................................................................ 8
1.1 Introduction ....................................................................................................................... 8
1.2 What is the Halogen Moisture Analyzer used for?................................................................... 8
1.3 Safety has priority .............................................................................................................. 10
1.4 Important information for these instructions ........................................................................... 12
2. Your first measurement in next to no time ........................................................................ 13
2.1 Unpacking and checking the standard equipment .................................................................. 13
2.2 Selecting the location ......................................................................................................... 14
2.3 Setting up, leveling and connecting to power supply .............................................................. 14
2.4 Preparing the printer ........................................................................................................... 18
2.5 Setting the date and time ....................................................................................................20
2.6 Your first measurement .......................................................................................................22
3. How to obtain the best results .......................................................................................... 26
3.1 Measurement principle of the Halogen Moisture Analyzer ........................................................ 26
3.2 Notes on adjustment of the balance and the dryer unit ........................................................... 27
3.3 Optimum sample preparation .............................................................................................. 27
3.4 Further information on moisture determination ....................................................................... 28
4. Practical application of your Moisture Analyzer ................................................................. 29
4.1 The operating concept ........................................................................................................29
4.2 Selecting the drying program ............................................................................................... 30
4.3 Setting the drying temperature ............................................................................................. 32
4.4 Selecting the switch-off criterion and performing a test measurement ....................................... 36
4.5 Selecting the display mode ................................................................................................. 39
4.6 Defining the print interval .................................................................................................... 41
4.7 Working with the weighing-in aid ........................................................................................ 42
4.8 Performing a measurement ................................................................................................. 44
4.9 Information on the measurement record ............................................................................... 47
5. Methods facilitate your work ............................................................................................ 51
5.1 What is a method? ............................................................................................................51
5.2 Recalling a method ............................................................................................................ 52
5.3 Naming, compiling or changing methods ............................................................................. 52
5.4 Printing out methods .......................................................................................................... 55
5.5 Measured value journal ...................................................................................................... 56
5.6 Measured value statistics ....................................................................................................58
6. The menu (basic settings of the instrument) ..................................................................... 60
6.1 Menu operation ................................................................................................................. 60
6.2 Adjusting the balance ......................................................................................................... 61
6.3 Adjusting the dryer unit ....................................................................................................... 63
Contents
7
6.4 Resetting to the factory settings............................................................................................65
6.5 Clearing the method memory .............................................................................................. 66
6.6 Setting the time .................................................................................................................. 67
6.7 Entering the date ................................................................................................................ 67
6.8 Setting the vibration adapter ................................................................................................67
6.9 Selecting operating mode of the automatic sample chamber ................................................... 68
6.10 Audio signal ...................................................................................................................... 68
6.11 Protecting your settings against change................................................................................ 69
6.12 Superimposing or removing the function symbols .................................................................. 69
6.13 Switching the weighing-in aid on or off ................................................................................. 70
6.14 Switching the printer on or off .............................................................................................. 71
6.15 Entering company name for printed records .......................................................................... 71
6.16 Selecting the type of record ................................................................................................. 72
6.17 Defining the free switch-off criteria........................................................................................ 74
6.18 Defining the free print interval .............................................................................................. 75
6.19 Switching the method option on or off .................................................................................. 75
6.20 Selecting the dialog language ............................................................................................. 76
6.21 Menu overview HR73 ......................................................................................................... 77
6.22 Menu overview HG53 ......................................................................................................... 78
7. Servicing and replacing individual parts ........................................................................... 79
7.1 Cleaning ........................................................................................................................... 79
7.2 Changing the printer paper and ribbon ................................................................................. 81
7.3 Replacing the power line fuses ............................................................................................ 83
7.4 Printer test ........................................................................................................................ 83
7.5 Installing the built-in printer ................................................................................................. 83
7.6 Dismantling and replacing the dryer unit .............................................................................. 84
8. If problems arise on occasion .......................................................................................... 85
8.1 Notes on the error messages ............................................................................................... 85
8.2 Meaning of the error messages............................................................................................ 86
8.3 What if...? ......................................................................................................................... 88
9. Further useful information ................................................................................................ 91
9.1 Notes on interpretation of the measurement results and the ideal sample weight ....................... 91
9.2 LocalCAN universal interface ............................................................................................... 91
9.3 Application brochure .......................................................................................................... 92
9.4 Switch-off criterion “Weight loss per unit of time” ................................................................... 92
9.5 Comments on certified version............................................................................................. 94
9.6 Technical data ................................................................................................................... 95
9.7 Optional equipment, expendable material and spare parts ...................................................... 97
10. Index .............................................................................................................................. 98
Getting to know your Moisture Analyzer – Section 1
8
1. Getting to know your Moisture Analyzer
Please read through this section carefully, it contains important information for safe and economical operation of
your Moisture Analyzer.
Text marked in grey in these operating instructions applies only to the HR73.
1.1 Introduction
Thank you for deciding to purchase a Halogen Moisture Analyzer from METTLER TOLEDO – you have made a wise
choice. Thanks to revolutionary technology, your Moisture Analyzer operates quickly and dependably. It offers a high
level of operating convenience and useful functions to facilitate determination of the moisture content of your
samples.
Behind your instrument stands METTLER TOLEDO, a leading manufacturer of not only balances and scales for the
lab and production, but also analytical measuring instruments. A customer service network covering the entire globe
with well trained personnel is at your service at all times, whether you are choosing accessories or require guidance
for a specific application to ensure optimum utilization of your instrument.
To ensure you make full use of the possibilities offered by your Moisture Analyzer, we advise you to read through
these operating instructions very carefully.
1.2 What is the Halogen Moisture Analyzer used for?
Your Halogen Moisture Analyzer can be used to determine the moisture content of virtually any substance in practice
are the sample heating rate and uniform heating of its surface. The instrument operates on the thermogravimetric
principle: At the start of the measurement the Moisture Analyzer determines the weight of the sample, the sample
is then quickly heated by the integral halogen dryer unit and the moisture vaporizes. During the drying operation,
the instrument continuously determines the weight of the sample and displays the loss of moisture. On completion
of drying, the moisture content or dry substance content of your sample is displayed as the final result.
Of decisive importance in practice is the rate of heating. In comparison with conventional infrared heating or the
drying oven method, for example, the halogen dryer unit of your instrument needs a shorter time to reach its
maximum heating power. It also allows use of high temperatures, an additional factor in shortening the drying time.
Uniform heating of the sample material ensures good repeatability of the drying results and makes it possible to
use a smaller amount of sample.
9
Section 1 – Getting to know your Moisture Analyzer
All parameters of a measurement (drying temperature, drying time, etc.) can be preselected. But your Moisture
Analyzer offers many other possibilities. To avoid exceeding the scope of this introduction, only a few of these are
listed here:
– In the built-in methods database 20 different methods can be individually optimized to suit your samples. They
are simple to activate at the touch of a key.
– The drying process can be adjusted to suit the type of sample
– You can choose between various types of result display at any time
– Your settings and the measurement results can be recorded and stored
– Thanks to the built-in rechargeable battery your valuable data remain stored even on power failure.
This wealth of functions notwithstanding, your Moisture Analyzer is very simple to operate. The status display (user
guide) guides you step by step through the measurement cycle and you always know which particular stage in a
measurement is currently being executed by the instrument and the next operating step. To exclude faulty handling
in routine work, the keypad can be locked to prevent access to all but the elementary functions. The motorized,
automatic sample chamber offers the operating convenience you are familiar with from compact disk (CD) players.
Moreover, the motorized drive opens up new possibilities for automatic operation of the instrument (loading by
means of robots) when used with the LocalCAN universal interface installed as standard.
But in addition to every type of user convenience, the quality of the measurement results continues to be of prime
importance. The built-in weighing cell meets the high standard which has made METTLER TOLEDO the worldwide
market leader in the field of high-resolution precision balances.
A brief word regarding standards, directives and procedures for quality assurance. The Moisture Analyzer conforms
with all common standards and directives. It supports stipulations, work techniques and result records as demanded
by all international quality assurance systems, e.g. GLP (Good Laboratory Practice), GMP (Good Manufacturing
Practice) or ISO 9001. The instrument has a CE declaration of conformity and METTLER TOLEDO as the
manufacturer has been awarded ISO 9001 certification. This provides you with the assurance that your capital
investment is protected in the long term by a high product quality and a comprehensive service package (repairs,
maintenance, servicing, calibration service).
As far as the features and possibilities of your Moisture Analyzer are concerned, we shall content ourselves at present
with the above brief description. You will find further information in the following sections of these operating
instructions. Please read through this information carefully to ensure you can use your instrument in an optimum
and safe manner.
Getting to know your Moisture Analyzer – Section 1
10
1.3 Safety has priority
Your Moisture Analyzer employs state of the art technology and meets the latest demands
regarding instrument safety. This notwithstanding, improper operation can endanger personnel
and cause damage to tangibles. For safe and dependable operation, please comply with the
following instructions:
– The Moisture Analyzer is used for determination of the moisture in samples. Please use the
instrument exclusively for this purpose. Any other type of use can endanger personnel and
damage the instrument or other tangibles.
– The Moisture Analyzer must not be operated in a hazardous environment and only under the
ambient conditions specified in these instructions.
– The Moisture Analyzer may be operated only by trained personnel who are familiar with the
properties of the samples used and with the handling of the instrument.
– Your Moisture Analyzer is supplied with a 3-pin power cable with an equipment grounding
conductor. Only extension cables which meet the relevant standards and also have an
equipment grounding conductor may be used. Intentional disconnection of the equipment
grounding conductor is prohibited.
The Halogen Moisture Analyzer works with heat!
– Ensure sufficient free space around the instrument to avoid heat accumulation and
overheating (approx. 1 m free space above the instrument).
– The vent over the sample must never be covered, plugged, taped over or tampered with in
any other way.
– Do not place any combustible materials on, under or next to the instrument when it is
connected to the power supply, since the area around the dryer unit becomes hot.
– Exercise caution when removing the sample. The sample itself, the automatic sample
chamber and any sample vessels used may still be very hot.
– During operation, you should never open the dryer unit as the ring-shaped heating element
or its protective glass can reach 400°C! If you have to open the dryer unit on occasion,
disconnect the instrument from the power supply and wait until the dryer unit has cooled down
completely.
– No modifications must be made within the heating element. It is particularly dangerous to
bend any components or remove them, or to make any other changes.
11
Section 1 – Getting to know your Moisture Analyzer
Certain samples require special care!
With certain types of samples, there is a possibility of danger to personnel or damage to
tangibles through:
Fire or explosion:
– Flammable or explosive substances
– Substances containing solvents
– Substances which evolve flammable or explosive gases or vapors when heated.
With such samples, work at a drying temperature that is low enough to prevent the formation
of flames or an explosion and wear protective goggles. Should there be any uncertainty
regarding the flammability of a sample, always work with a small amounts of sample (max.
1 gram). In such cases, never leave the instrument unattended! In cases of doubt, perform
a careful risk analysis.
Poisoning, burning:
– Substances which contain toxic or caustic components. Such substances may be dried only
in a fume cupboard.
Corrosion:
– Substances which evolve corrosive vapors when heated (e.g. acids). In the case of such
substances, we advise you to work with small amounts of sample as the vapor can condense
on cooler housing parts and cause corrosion (if necessary, the dryer unit can be changed
very easily by the user, see section 7.6).
Please note that the user always takes responsibility and assumes liability for damage caused
by use of the types of samples mentioned above!
– Never make any modifications or constructional alterations to the instrument and use only
original spare parts and optional equipment from METTLER TOLEDO.
– Your Moisture Analyzer is a rugged precision instrument – but you should still treat it carefully;
it will then thank you with many years of trouble-free operation.
– Please comply with all notes and instructions in these operating instructions. Keep the
instructions in a safe place where they are immediately to hand if any points are unclear. If
you lose these instructions, please contact your METTLER TOLEDO dealer for an immediate
replacement.
Getting to know your Moisture Analyzer – Section 1
12
1.4 Important information for these instructions
These instructions guide you step by step through the operation of your Moisture Analyzer. The
first two sections help you put the instrument into operation quickly, safely and properly and
perform your first measurement within a short space of time. In sections 3 through 6 you become
intimately acquainted with the wide range of functions of your Moisture Analyzer. During this
learning phase, you will find the table of contents and the detailed index in section 10 a valuable
orientation aid. Sections 7 through 9 contain additional information on the maintenance of your
instrument, troubleshooting and the available options. As soon as you are familiar with your
Moisture Analyzer, you will find the illustrations at the beginning of these instructions and the
associated references (in the key) useful for quick access.
The following identifications and symbols are used in these instructions:
– Information marked in grey applies only to the HR73.
– Key designations are shown enclosed by twin angle brackets «». Keys with inscribed text are
shown with the actual inscription (e.g. «on/off» or «Start»). For all keys with symbols,
designations are used in the text which describe the function of the particular key («Print»,
«Accept entry » or «Scroll down»).
– This symbol indicates safety and hazard instructions. If these are not complied with, injury
to the user, damage to your instrument or other tangibles and malfunctions can result.
– This symbol indicates additional information and directions which facilitate your handling of
the instrument and contribute to proper and economical use.
These instructions are also available in foreign languages. Should you require a set of
instructions in a different language, please contact your METTLER TOLEDO dealer. You will find
the address of your nearest dealer in the attached Declaration of Conformity.
Section 2 – Your first measurement in next to no time
13
2. Your first measurement in next to no time
In the section you will learn how to put your new Moisture Analyzer into operation and obtain measurement results
within a very short space of time.
2.1 Unpacking and checking the standard equipment
Open the package and remove the instrument and the accessories. Check the completeness of the delivery. The
following accessories are part of the standard equipment of your new Moisture Analyzer:
– 80 aluminum sample pans
– 1 sample holder
– 1 sample handler
– 1 specimen sample (circular, absorbent cellulose disk)
– 1 draft shield element
– 1 power cable
– 1 set of operating instructions, 1 set of short-form operating instructions
– 1 MT-SICS Reference Manual with command set of interface
– 1 Application brochure “Methods of moisture content determination”
– 1 Declaration of Conformity
– Setup instructions
Remove the wrapping from the instrument.
Check the instrument for transport damage. Immediately inform your METTLER TOLEDO dealer if you have any
complaints or parts are missing.
Store all parts of the packaging. This packaging guarantees the best possible protection for the
transport of your instrument.
To prevent transport damage, the instrument is provided with a transport arrestment, which you have to remove
before putting the instrument into operation for the first time. The procedure for removing the transport arrestment
is explained in the description “Setup instructions” enclosed with the package.
Your first measurement in next to no time – Section 2
14
2.2 Selecting the location
Your Moisture Analyzer is a precision instrument. An optimum location guarantees accuracy and dependability:
2.3 Setting up, leveling and connecting to power supply
– Firm, horizontal location as free from vibrations as possible
– Avoid direct sunlight
– No excessive temperature fluctuations
– No powerful drafts
– Surroundings as free from dust as possible
– Adequate free space at the front for opening the sample chamber and
sufficient clearance around the instrument to allow warm air to dissipate.
– Sufficient distance from heat-sensitive materials in the vicinity of the
instrument.
Exact horizontal positioning and stable installation are prerequisites for
repeatable results. To compensate small irregularities or inclinations (±2%)
at the location, the instrument can be leveled.
For exact horizontal positioning, the Moisture Analyzer has a level indicator
(level) and 3 leveling screws. As soon as the air bubble is precisely in the
middle of the cross hairs, the instrument is exactly horizontal. To level it,
proceed as follows:
Position your Moisture Analyzer at the selected location.
R
L
L
R
HR/HG 02
Section 2 – Your first measurement in next to no time
15
Screw in the right front leveling screw completely (it is not needed for
leveling). The instrument is now standing on the front left, nonadjustable
foot, as well as on the two rear leveling screws.
Turn the two rear leveling screws until the air bubble is located in the middle
of the level indicator. The arrows and the leveling screw designations (R =
right rear leveling screw, L = left rear leveling screw) on the cross hairs will
facilitate the setting:
If the air bubble is located at the bottom left, for instance, the inscription
indicates the right leveling screw must be turned in a clockwise direction.
Unscrew the front right leveling screw until it contacts the support and the
instrument is resting firmly on all 4 feet. Ensure that the air bubble remains
in the center of the level indicator.
Note: The instrument should be releveled each time its location is changed.
Connect the instrument to the power supply.
Warning:
If the power cable supplied is not long enough, use only a 3-pin extension
cable with equipment grounding conductor!
HR/HG 03
HR/HG 05
HR/HG 06
HR/HG 04
R
L
L
R
R
L
L
R
Your first measurement in next to no time – Section 2
16
on
off
For technical reasons, the halogen dryer unit is designed specifically for a
particular line voltage (110 V AC or 230 V AC). A dryer unit is installed in
the factory that is matched to the particular line voltage of the country of
destination. If you are not sure whether the dryer unit built into your
instrument is suitable for your local line voltage, check the voltage data in
the interior of the dryer unit before you connect the Moisture Analyzer to the
power supply!
Connection to a line voltage that is too high can lead to blowing of the fuses,
whereas a supply voltage that is too low will prolong the drying process.
Ensure that the transport arrestment is removed. Instructions on how to
remove the transport arrestment can be found on the leaflet enclosed with the
package.
Switch the instrument on with the «on/off» key.
Note: When putting into operation for the first time, leave the instrument
connected to the power supply for at least 5 hours to allow the built-in battery
to charge up! If the instrument is later disconnected from the power supply
for several months, the battery will become discharged. This leads to data
loss. To recharge the battery, leave the instrument connected to the power
supply for at least 5 hours.
Press the «Open/close auto sample chamber» key and ...
… the motorized, automatic sample chamber opens.
Always ensure sufficient free space in front of the instrument since the
emerging automatic sample chamber could knock over objects in its path
or push them off the bench.
HR/HG 07
Section 2 – Your first measurement in next to no time
17
HR/HG 08
Install the draft shield element (only one position possible) and then the
sample pan holder. Turn the sample pan holder until it engages. In the locked
position, the rear arm of the sample pan holder points exactly in the direction
of motion of the automatic sample chamber.
Press the «Open/close auto sample chamber» key and ...
… the motorized, automatic sample chamber closes.
HR/HG 09
Your first measurement in next to no time – Section 2
18
2.4 Preparing the printer
If your Moisture Analyzer is not equipped with a built-in printer, there is no need to read this section. You can always
order the built-in printer at a later date and install it yourself.
You can prepare the built-in printer for use as follows:
Disconnect the instrument from the power supply.
Swing back the cover of the printer.
Insert the ribbon cassette in the printer and press it down until you hear it click
into place.
Tension the ribbon by turning the small wheel on the left of the cassette in
the direction shown by the arrow.
HR/HG 11
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Halogen Moisture Analyzer
HR73
EJECT
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HR/HG 10
Section 2 – Your first measurement in next to no time
19
Place the roll of paper in the paper compartment and feed the paper
horizontally through the slot at the back of the printing unit.
Connect the instrument to the power supply and switch it on with the «on/
off» key. Press the «Paper feed» key until the leading edge of the paper exits
the printing unit at the top.
Lead the paper through the slot in the cover of the built-in printer and close
the cover.
HR/HG 14
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Your first measurement in next to no time – Section 2
20
Menu
2.5 Setting the date and time
Your Moisture Analyzer prints out the date and time on every record. When you put your new instrument into operation
for the first time, you should enter the current date and the time, these settings are retained even if you disconnect
your instrument from the power supply.
In this section you will enter the menu for the first time, although this is described in detail in a later section. Do not
worry if you have to press keys whose function you are not familiar with, simply follow the instructions step by step.
We describe the menu in detail in section 6.
Note: Various languages are available for the dialog with your instrument and can be selected in the menu. You
will find further details on language selection in section 6.20.
∑CAˆ NO
Press the «on/off» key to switch the instrument on.
After it has been switched on, the instrument performs a self-test. Wait until
the display shown opposite appears.
Press the «Menu» key. You are now already in the menu.
Press the «Accept entry» or «Menu» key repeatedly until the display shown
opposite for entry of the time appears.
Important: Do not press any other key, otherwise you could possibly change
the factory settings of your instrument!
on
off
TIMË 1‹04
Menu
Menu
1
Section 2 – Your first measurement in next to no time
21
Use the «Scroll up» and «Scroll down» keys to set the time (00:00–
23:59). By pressing and holding the keys you can accelerate the change
in the time. Confirm your setting with the «Accept entry» key. The
instrument stores the time.
After confirmation of the time, the display for entry of the current date
appears. Use the «Scroll up» and «Scroll down» keys to set the date in the
format “Day – Month – Year” (DD.MM.YY). By pressing and holding the
keys you can accelerate the change in the date. Confirm your entry with
the «Accept entry» key and the instrument stores the date.
Note: With US English as the dialog language, the following applies to
entry of the date format “Month – Day – Year” (MM/DD/YY).
This completes your entry of the date and time and you can now quit the
menu by pressing the «Reset» key. Your settings are stored and remain
so even in the event of a power failure. The Moisture Analyzer is now ready
for your first measurement.
Menu
DAÎ 1{0}95
Menu
DAÎ 2Ç1±95
Menu
TIMË 1Æ28
Reset
1
2
2
Your first measurement in next to no time – Section 2
22
2.6 Your first measurement
After you have successfully put your new Moisture Analyzer into operation for the first time, you can immediately
perform your first measurement. In doing so, you will become familiar with the instrument and the status display
and at the same time perform a function check.
Please use the specimen sample supplied for your first measurement. This sample is an absorbent cellulose disk.
During your first measurement, the instrument operates with the factory settings.
Your Moisture Analyzer has a novel graphical status display (user guide)
which you will become acquainted with in this section. The status display
informs you continuously about the current status of the instrument and
prompts you to execute the next operating step (shown flashing).
Switch the instrument on with the «on/off» key.
Initial status with closed automatic sample chamber.
Press the «Open/close auto sample chamber» key and …
… the motorized, automatic sample chamber opens.
Always ensure sufficient free space in front of the instrument since the
emerging automatic sample chamber could knock over objects in its path
or push them off the bench.
Status: Ready for taring
The status display flashes and prompts you to load the empty sample pan
and tare.
on
off
HR/HG 07
Section 2 – Your first measurement in next to no time
23
Place the empty sample pan in the sample pan handler (this is possible
without tilting the sample pan if you insert this in the pan handler from the
side directly below the round flange). Place the sample pan handler in the
automatic sample chamber. Ensure that the tongue of the pan handler fits
exactly in the slot of the draft shield element. The sample pan must lie flat
in the pan holder.
Note: We advise you to work with the sample pan handler at all times. The
pan handler is ergonomic, safe and provides protection against possible
burns due to the hot sample pan.
Press the «Tare/zero» key. This sets the balance installed in the Moisture
Analyzer to zero. For taring, the automatic sample chamber closes briefly
then opens again.
Status: Ready for weighing
After taring, the status display flashes and prompts you to place the sample
in the sample pan.
Place the specimen sample in the sample pan.
Wet the specimen sample with a few drops of water.
HR/HG 16
0/T
HR/HG 17
HR/HG 18
Your first measurement in next to no time – Section 2
24
Status: Ready for start
The status display flashes and prompts you to start the drying process.
Press the «Start» key and …
… the motorized, automatic sample chamber closes. The instrument starts
the drying and measurement.
Status: Drying and measurement
You can follow the drying and measurement process in the display:
– The status display uses rising bubbles to symbolize the drying process.
– The current temperature in the dryer unit is displayed as well as the
elapsed drying time and the current drying value.
– Further, the display shows information on the selected settings. You will
find additional information on the meaning of the displays and the various
setting possibilities in section 4. If your instrument has a built-in printer,
the measurement results will be printed out continually (at intervals of
30 seconds).
At the end of the drying time, an audio signal sounds and the sample
chamber is automatically opened.
Warning: Sample pan and sample are still hot!
Start
HR/HG 19
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HR/HG 07
Section 2 – Your first measurement in next to no time
25
59
‹10
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You can now read off the moisture content of your sample in the display.
Carefully remove the sample pan handler from the automatic sample
chamber.
Warning: As the pan and sample may still be hot, you should let these
cool down before removing the pan from the handler!
To remove the sample pan from the handler, lift the pan slightly from below
and pull it sideways out of the handler (if you no longer need the sample and
the pan, you can simply tilt the handler until the pan slides out).
Press the «Reset» key to delete the measurement result from the display. The
instrument is now ready for the next measurement. If you do not wish to
perform another measurement, press the «Open/close auto sample chamber» key. The automatic sample chamber closes.
Congratulations!
You have just performed your first measurement with your new Moisture
Analyzer. In the following section you will find important information on the
operating principle of your instrument, its calibration and optimum preparation of your samples.
Notes on the automatic sample chamber
– Before every automatic closure of the automatic sample chamber, an
audio signal sounds.
– For reasons of safety, the open automatc sample chamber is automati-
cally closed after 2 minutes. If a weight change occurs or a key is pressed
during this time, the 2 minute period starts over again.
HR/HG 20
Reset
How to obtain the best results – Section 3
26
3. How to obtain the best results
Following your first practical work with the Moisture Analyzer, in this section you will find important information on
how to obtain optimum results. You will discover what parameters influence the measurement process and how
you can match the instrument optimally to your particular measurement task.
3.1 Measurement principle of the Halogen Moisture Analyzer
Your instrument performs measurements based on the thermogravimetric principle, i.e. the moisture is determined
from the weight loss of a sample dried by heating.
In principle, your instrument thus comprises two instruments: a precision
balance and a dryer unit. In contrast to other thermogravimetric methods
(drying oven, infrared, microwave), the Halogen Moisture Analyzer operates
with a halogen dryer unit. This ensures fast heating of the sample and thus
guarantees rapid availability of the measurement results.
120 °C
In addition to thermogravimetric methods, chemical and electrical methods for moisture determination are also
common. A familiar chemical method is that due to Karl Fischer in which the water content is determined by titration.
This method is particularly suitable for determination of the water content of liquids or for the detection of very small
amounts of water (ppm range) in solid and liquid samples.
Irrespective of the measurement method, the quality of the measurement results stands or falls by the preparation
of the sample and a correct choice of the important measurement parameters:
– Sample size
– Drying temperature
– Drying time
You will find detailed information on the relationships between these parameters in the application brochure for
moisture determination (see section 9.3), enclosed to your instrument.
In practice, however, not only the quality of the measurement results, but also the speed of the measurement
process is important. Thanks to its drying principle (with the heat generated by a halogen radiator), the Halogen
Moisture Analyzer is very fast. You can increase the speed even further through optimum setting of the instrument.
Section 3 – How to obtain the best results
27
The optimum drying temperature and the drying time are dependent on the nature and size of the sample and
on the desired accuracy of the measurement results. These can be determined only by experiment. The Halogen
Moisture Analyzer supports you in this task: It offers automatic performance and result recording of test
measurements to determine optimum values of the settings.
3.2 Notes on adjustment of the balance and the dryer unit
Both the built-in balance and the dryer unit of your instrument can be adjusted. Adjustment of the balance is not
absolutely necessary for a correct moisture determination as the measurement is relative: The balance determines
the weight of the sample before and after drying and the moisture is calculated on the basis of the ratio between
the wet and dry weights.
Nevertheless, you should adjust the built-in balance and dryer unit under the following conditions:
– If this is stipulated by your quality assurance system (GLP, GMP, ISO 9001).
Note: You can assure long term reproducibility of the instrument by regular adjustment (e.g. every 6 months) and
hence comply with an important requirement of every quality assurance system. METTLER TOLEDO offers an
adjustment service – please contact your local dealer.
– If you also use your instrument as a high precision lab balance, you should adjust the balance at regular intervals.
– If you have changed the dryer unit, adjust it with the help of an external thermometer.
The procedure for adjusting the balance and dryer unit is described in section 6.
3.3 Optimum sample preparation
Preparation of the sample is decisive for the speed of the measurement process and the quality of the measurement
results.
Please note the following basic rules for the preparation of your sample:
The amount of sample you select should be as small as possible and only as large as necessary
Excessive amounts of sample require more time for drying and thus prolong the measurement process. If the amount
of sample is too small, the measurement result may possibly not be representative. The following always holds:
The greater the inhomogeneity of the sample, the larger the amount of sample needed to obtain a repeatable result
(please see also the list in section 9.1).
How to obtain the best results – Section 3
28
Distribute the sample evenly over the sample pan
You thus increase the surface area of the sample and facilitate heat absorption. The base of the pan should be evenly
covered.
With liquid, fat-containing, melting and highly reflecting samples, you should cover the sample with the glass fiber
disc available as optional equipment (HA-F1 214464, see section 9.7). This also applies to samples which form
a skin on their surface when heated. The glass fiber disc ensures even and rapid heat distribution and prevents the
formation of a skin impervious to moisture on the sample surface.
3.4 Further information on moisture determination
You will find further information on the moisture determination, the importance of the parameters and the preparation
of the samples in the Application Brochure “Methods of moisture content determination” dealing with moisture
determination (see section 9.3).
If you require information on specific applications, your METTLER TOLEDO dealer will be pleased to help you.
Section 4 – Practical application of your Moisture Analyzer
29
4. Practical application
of your Moisture Analyzer
In this section we introduce you to the wide range of setting possibilities of your Moisture Analyzer and offer
information and tips for optimum setting of the parameters.
4.1 The operating concept
You already performed your first measurement in section 2. This measurement was carried out using the factory
settings. However, your instrument offers a number of setting possibilities to match the measurement process to
your specific requirements. For instance, you can preselect the drying temperature, the type of result display and
many other parameters.
%
Settings are made using the function keys. These keys are right at the top of
the keypad, directly below the display. The setting you select appears in the
display directly above the associated key.
You will learn the available setting possibilities and the function keys in detail
in the following sections. Further, you will also discover how to set the drying
temperature and the drying time and how to work with the weighing-in aid.
Finally, you will perform a complete measurement with the specific settings
for your sample.
Numeric entries
With some settings (e.g. the drying temperature), numeric entries are
required. It depends on the instrument that you have two different possibilities
to enter the values:
You can change the flashing displayed value with the «Scroll up» or «Scroll
down» key or …
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125
Practical application of your Moisture Analyzer – Section 4
30
... you can key in the new value directly with the numeric keys.
You can remove wrong numbers with the «Delete» key.
As soon as you have entered the desired value, press the «Accept entry» key.
The value will be stored.
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6
3
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Preliminary information on the methods
All settings for a sample which you will learn in the following sections can be collected in a so-called “Method”.
You have 20 methods freely available thus giving you the possibility of defining a method for a particular sample
and recalling it at any time. This eases the work load considerably as each time you switch to a different type
of sample there is no need to repeat all the parameter settings. The methods are retained when the instrument
is switched off. You will find information on the compilation and use of methods in section 5.
4.2 Selecting the drying program
This function key offers you four different drying programs for optimum matching of the drying characteristics to
the sample used.
Each time this key is pressed, the next program appears. After the fourth
and last program, the first reappears in the display. As soon as you have
selected the desired program, the setting is active and you do not have to
confirm or store it.
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