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MB-T-210
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Instruction Manual
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Cole-Parmer MB-T-210, MB-T-50, MB-T-50.H Instruction Manual

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User Manual Cole-Parmer Symmetry MB-T Moisture Balance Series
01-16-17 REV03
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Contents
1. GENERAL INFORMATION ..................................................................................................................................... 6
1.1 INTENDED USE ................................................................................................................................................................... 6
1.2 WARNING SYMBOLS AND SIGNALS .................................................................................................................................... 6
1.3 SAFETY PRECAUTIONS ....................................................................................................................................................... 7
1.4 SYSTEM PRECAUTIONS ...................................................................................................................................................... 8
1.5 SUPERVISION OVER METROLOGICAL PARAMETERS .......................................................................................................... 9
1.6 PROTECTIVE CLOTHING ..................................................................................................................................................... 9
1.7 WARRANTY CONDITIONS ................................................................................................................................................... 9
2. UNPACKING AND INSTALLATION ..................................................................................................................... 10
2.1 PLACE OF USE AND ASSEMBLING ..................................................................................................................................... 10
2.2 STANDARD DELIVERY COMPONENTS LIST........................................................................................................................ 10
2.3 UNPACKING ..................................................................................................................................................................... 10
2.4 BALANCE ASSEMBLY ........................................................................................................................................................ 11
2.5 BALANCE LEVELING .......................................................................................................................................................... 12
2.6 POWERING THE DEVICE ................................................................................................................................................... 12
3. BALANCE CONTROL ........................................................................................................................................... 13
3.1 BALANCE KEYBOARD ........................................................................................................................................................ 13
3.2 BALANCE HOME SCREEN.................................................................................................................................................. 13
3.3 ENTERING BALANCE MENU ............................................................................................................................................. 14
3.4 SCREEN SCROLLING .......................................................................................................................................................... 14
3.5 SOFT KEYS LIST ................................................................................................................................................................. 15
4. DRYING MODE ....................................................................................................................................................... 15
4.1 MOISTURE CONTENT MEASUREMENT ON A MOISTURE ANALYZER ................................................................................ 16
4.2 SAMPLING AND PREPARATION ........................................................................................................................................ 17
4.3 SELECTING OPTIMUM MASS FOR A SAMPLE .................................................................................................................... 19
4.4 DRYING TEMPERATURE ................................................................................................................................................... 20
4.5 DRYING PROCESS PROFILE AND DRYING PARAMETERS ................................................................................................... 20
4.6 DRYING TIME ................................................................................................................................................................... 23
4.7 DRYING PROCESS ............................................................................................................................................................. 24
4.8 DRYING PROFILE ANALYSIS .............................................................................................................................................. 27
5. WEIGHING MODE .................................................................................................................................................. 28
5.1 GOOD WEIGHING PRACTICE ............................................................................................................................................ 28
5.2 UNITS ............................................................................................................................................................................... 29
5.3 USER-DEFINED UNIT ........................................................................................................................................................ 30
5.4 BALANCE ZEROING ........................................................................................................................................................... 31
5.5 BALANCE TARING ............................................................................................................................................................. 31
5.6 WEIGH MODE SETTINGS .................................................................................................................................................. 33
6. ADJUSTMENT ........................................................................................................................................................ 34
6.1 EXTERNAL ADJUSTMENT .................................................................................................................................................. 35
6.2 USER ADJUSTMENT .......................................................................................................................................................... 35
7. WORKING MODES- GENERAL INFORMATION ............................................................................................... 35
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7.1 RUNNING WORKING MODE ............................................................................................................................................. 36
7.2 QUICK ACCESS KEYS ......................................................................................................................................................... 36
8. DATABASES .......................................................................................................................................................... 38
8.1 DATABASE CONNECTED OPERATIONS ............................................................................................................................. 38
8.2 PRODUCTS ....................................................................................................................................................................... 39
8.3 USERS ............................................................................................................................................................................... 40
8.4 PACKAGING ...................................................................................................................................................................... 40
8.5 CUSTOMERS ..................................................................................................................................................................... 40
8.6 DRYING PROGRAM .......................................................................................................................................................... 41
8.7 DRYING PROCESS REPORTS .............................................................................................................................................. 41
8.8 AMBIENT CONDITIONS .................................................................................................................................................... 41
8.9 WEIGHING RECORDS ....................................................................................................................................................... 42
9. COMMUNICATION ................................................................................................................................................. 43
9.1 RS232 PORTS SETTINGS PROCEDURE: .............................................................................................................................. 44
9.2 ETHERNET PORT SETTINGS .............................................................................................................................................. 44
9.3 WI-FI PORT SETTINGS ....................................................................................................................................................... 44
9.4 USB PORT ......................................................................................................................................................................... 47
10. PERIPHERAL DEVICES ................................................................................................................................... 51
10.1 COMPUTER .................................................................................................................................................................... 51
10.2 PRINTER ......................................................................................................................................................................... 53
10.3 USB FLASH DRIVE ........................................................................................................................................................... 55
11. USERS................................................................................................................................................................. 56
12. PRINTOUTS ........................................................................................................................................................ 58
12.1 ADJUSTMENT PRINTOUT REPORT .................................................................................................................................. 58
12.2 OTHER PRINTOUTS ........................................................................................................................................................ 59
13. PROXIMITY SENSORS ..................................................................................................................................... 62
14. ADVANCED FEATURES ................................................................................................................................... 64
14.1 AUTOMATIC FINISH MODE ............................................................................................................................................ 64
14.2 BUTTON, LABELS AND TEXT FIELDS CONFIGURATION ................................................................................................... 64
14.3 DRYING PROCESS PERFORMED USING THE DRYING MODES DATABASE........................................................................ 68
14.4 LABELS ........................................................................................................................................................................... 68
14.5 TEXT FIELDS .................................................................................................................................................................... 70
14.6 BAR GRAPHS .................................................................................................................................................................. 73
14.7 QUICK ACCESS KEYS CUSTOMIZATION ........................................................................................................................... 74
14.8 WEIGHING UNIT ACCESSIBILITY ..................................................................................................................................... 75
14.9 START UNIT SELECTION .................................................................................................................................................. 76
14.10 BALANCE SETTINGS ...................................................................................................................................................... 76
15. MAITENANCE .................................................................................................................................................... 80
16. ACCESSORIES .................................................................................................................................................. 81
17. APPENDIX .......................................................................................................................................................... 81
17.1 MOISTURE ANALYZER .......................................................................................................................................................... 81
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17.2 DIMENSIONS .................................................................................................................................................................. 82
17.3 CONNECTORS ................................................................................................................................................................ 82
17.4 ERROR MESSAGES .......................................................................................................................................................... 83
17.5 WARRANTY CARD .......................................................................................................................................................... 83
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1. GENERAL INFORMATION
1.1 INTENDED USE
The moisture analyzer is designed to verify relative moisture content in small samples of various substances, dry mass content in small samples, and determine the mass of weighed objects. Any other use of the moisture analyzer may be dangerous both to the device and the user. The device ensures a fast and precise determination of water content in a tested sample, and the touch screen display considerably simplifies the operation and improves the functionality of the moisture analyzer. The device can be used to determine humidity content of different materials.
At the initial stage of the measurement, the moisture analyzer precisely determines the mass of an object placed on the weighing pan. As the mass reading is stabilized, the sample is quickly heated by the halogen lamp, an IR emitter, or a metal heater, causing water to evaporate from the sample. While sampling, the moisture analyzer is continuously checking loss of mass, and on completing this calculation, it displays the current moisture content of the sample being tested.
Compared to conventional methods of humidity content determination of various substances, the moisture analyzer considerably shortens the measurement time and simplifies the testing procedure. The moisture analyzer allows users to set multiple parameters that influence moisture content determination in a sample (temperature, time, drying modes, etc.).
The moisture analyzer should be utilized and supervised only by users who are trained
and experienced in these types of instruments. Do not make any design modifications. Additional equipment compatible with the moisture analyzer and spare parts should be supplied by Cole-Parmer.
1.2 WARNING SYMBOLS AND SIGNALS
Safety precautions are marked with special descriptions and warning signs. They warn a user of possible dangers. Ignoring the safety warnings may cause injuries, damage to the moisture analyzer, incorrect operation, and errors of measurements.
Warning Descriptions
WARNING
Medium-risk danger that can lead to a serious injury or death.
CAUTION
Low-risk danger that can lead to moisture analyzer damage or dysfunction, loss of data, or minor or moderate injury.
NOTE
Critical information on the moisture analyzer.
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Warning Symbols
1.3 SAFETY PRECAUTIONS
WARNING: Adherence to safety information and user manual guidelines is required to prevent risk of accident or death.
WARNING: Nominal voltage for a moisture analyzer is 110V AC. Safety precautions for low-voltage devices must be abided by while operating the device. The moisture analyzer is equipped with a three-core power supply cable with grounding pin. If necessary, an extension cord can be used, provided that it meets the applicable standards and has a protective ground conductor. Intended disconnection of the grounding cable is forbidden.
CAUTION: The drying chamber cannot be opened during the drying process. The halogen lamp and its glass shield may reach temperatures up to 400˚ C.
When setting up the moisture analyzer, leave enough space to prevent heat from building up and to keep your analyzer from overheating. Leave about 20 cm around the instrument and about 1 m above. Air vents located in the housing cannot be covered, sealed, or blocked in any other way.
Do not put any flammable substances on, under or near the moisture analyzer. Be particularly careful when removing the sample from the drying chamber. The sample itself, the drying chamber, the shields, and the pan can still be extremely hot.
For any maintenance work such as cleaning the inside of the drying chamber, the moisture analyzer must be switched off. Wait until all the components have cooled down. Do not perform any modification to the heating module.
CAUTION: Corrosion can come from substances that release aggressive vapors (e.g., acids) during the heating process. While drying such substances, it is recommended that users work with small samples. Otherwise, vapors can condense on cold housing parts and cause corrosion.
Some types of samples require taking particular safety precautions. Some samples can pose a danger for people and objects. It is always the user who is liable for possible damages caused by the use of an inappropriate sample.
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WARNING:
Fire or explosion can result from flammable or explosive substances, substances containing solvents, or substances releasing flammable or explosive gases or vapors. When in doubt, characteristics perform a risk analysis with the sample before carrying out the procedure. For these samples, apply as a low drying temperature as possible to prevent flames or explosion. During the analysis, it is necessary to wear protective glasses and gloves. The samples should be relatively small. Under no circumstances
can the instrument be left unsupervised!
WARNING:
Caustic or corrosive components in substances that release toxic gases or vapors can cause irritations of the eyes, skin, or respiratory system, illnesses, or even death. Dry such substances only in fume cupboards.
Under no circumstances should the instrument be used within an area near potential explosions. The moisture analyzer is designed to be operated outside hazardous areas exclusively.
Do not open the drying chamber during the drying process. The moisture analyzer features a halogen lamp, which is a very powerful heat source. Pay special attention not to touch those elements of the moisture analyzer that get hot while the drying procedure (i.e., the disposable pan, the pan handle, and the inner shields of the drying chamber).
1.4 SYSTEM PRECAUTIONS
Do not open the instrument’s housing. There are no parts inside that would require
maintenance, repair, or replacement by a user. In case of any problems, contact Cole­Parmer.
The moisture analyzer is not intended for dynamic weighing. Even if small amounts of a
sample are added to or taken off the weighing pan, the mass readout should be taken only on stabilization of the measurement result (appearance of stability symbol on the display).
Do not place any magnetic materials on the weighing pan, as this can damage the
measuring system of the instrument.
Avoid impact shock and overloading of the moisture analyzer in excess of the prescribed
maximum measuring range (max capacity), minus any possible tare weight that has been applied.
Remember that it is forbidden to make any modification to the moisture analyzer. The Cole-
Parmer moisture analyzer adheres to all binding safety regulations. Nevertheless, there are exceptional circumstances that may cause danger.
Before commissioning the moisture analyzer, make sure that the nominal power of the
device specified on its data plate is compatible with the supply in the power supply to which the moisture analyzer is to be plugged in.
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Halogen lamps can only be changed by an authorized service employee.
Protect the moisture analyzer from liquid. This might lead to electrocution, fire, emission of
substances containing toxic or caustic vapor, or emission of explosive substances.
1.5 SUPERVISION OVER METROLOGICAL PARAMETERS
Metrological parameters of the moisture analyzer need to be checked by a user at regular intervals.
Inspection frequency depends on the ambient conditions in which the moisture analyzer is used, the types of processes performed, and the adopted quality management system.
1.6 PROTECTIVE CLOTHING
While working with the instrument, use protective clothing to protect yourself from potential hazards, which might be samples and ingredients being tested.
Use the following while carrying out tests:
protective apron protective glasses protective gloves (while working with hazardous chemical substances)
Make sure that any protective clothing has been designed to be used with specific samples and that it is not damaged.
1.7 WARRANTY CONDITIONS
A. Cole Parmer will exchange, replace or repair the existing balance for any damage that
appears to be faulty by production or by construction within the 3-year warranty period.
B. Warranty is voided if:
mechanical defects caused by inappropriate use:
• defects of thermal and chemical origin,
• defects caused by lightning, overvoltage in the power network
• defects caused by water damage
• or other random event
overloading the mechanical measuring system installing another version of the operating system utilizing the balance contrary to its intended use repairs carried out by non-authorized service centers removing or destroying protective stickers which secure the balance’s housing against
unauthorized access
C. Warranty card must be filled out for warranty to be valid.
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2. UNPACKING AND INSTALLATION
2.1 PLACE OF USE AND ASSEMBLING
Store and use your moisture analyzer in locations free of vibrations as well as air movement
and dust.
Make sure that it is located at the max altitude of 2000 feet above sea level. Make sure that the moisture analyzer’s setting ensures good air circulation around the
instrument (approximately 20 cm free space around the moisture analyzer and 1 m free space over it).
The ambient air temperature in the weighing room should not be out of the specified range:
+10°C to +40°C.
The ambient relative humidity for temperatures up to 31oC it should be 80% maximum, and
it should decrease linearly to 50% for a temperature of 40°C.
Make sure that the moisture analyzer is placed away from heat sources on a stable table
that is not affected by vibrations.
Since part of the balance is a strong magnet, take special safety measures when weighing
magnetic objects.
2.2 STANDARD DELIVERY COMPONENTS LIST
Balance and components shown in Section 2.4 depending on balance model Warranty Card USB
o User Manual o RLAB Software o RLAB Software Manual o 5 x Disposable Aluminum Pans
2.3 UNPACKING
Carefully take the device out of the packaging, remove the transport lock, and gently place the moisture analyzer where it will be used. Install the weighing pan and accessories following the diagram below.
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2.4 BALANCE ASSEMBLY
Model: MB-T-50.H, MB-T-50, MB-T-210 Components-
Installation-
1) Install components following diagram below:
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2.5 BALANCE LEVELING
It is necessary to level the balance prior to plugging it in. To level the balance, turn its feet until the air bubble is in the center position.
The balance should firmly rest on a surface, each of the feet must be supported.
2.6 POWERING THE DEVICE
Before beginning a measuring processes, wait until the moisture analyzer reaches thermal stabilization.
For moisture analyzers that were stored in much lower temperatures before being plugged in, (e.g., during winter), thermal stabilization will take at least 4 hours. During the thermal stabilization, the indications on the display panel can change. It is recommended that ambient temperature changes where the device will be used are insignificant and slow to change.
The moisture analyzer can be plugged to the outlet only by using its original power cord, which comes standard with the moisture analyzer. The rated voltage specified on the device’s data plate must be compatible with the power source’s rated voltage.
The power cord can be connected only to a socket with a ground contact. Plug the power cord into the moisture analyzer. The moisture analyzer’s power plug is located at the back of its housing.
The moisture analyzer display shows its name and program number first, followed by an indication of 0.000 g (balances with readability of 1 mg) or 0.0000 g (balances with readability of 0.1 mg). If
the indication does not equal zero, press the > button.
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3. BALANCE CONTROL
3.1 BALANCE KEYBOARD
3.2 BALANCE HOME SCREEN
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3.3 ENTERING BALANCE MENU
Operation of the balance menu is intuitive and easy to use. The touch panel makes the balance operation easy. Pressing a function key, a soft key or an area on the display initiates an assigned function or process
To enter balance main menu, press <PARAMETERS> button. Clicking any button within this section, or clicking any button with a parameter name, results in a change of color (this is for signaling purposes). If a given area has any function or action assigned, then it is performed automatically upon clicking (e.g. adjustment procedure), respectively a window with parameters or a list of appropriate settings is displayed.
3.4 SCREEN SCROLLING
There are two methods for scrolling the screen of parameters window. The first one requires pressing, holding down and scrolling up or down the scrollbar located on the left. The second one requires pressing, holding down and scrolling up or down on any point of the displayed window.
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3.5 SOFT KEYS LIST
Press to enter the main menu.
Press to clear the editing field.
Press to scroll the menu “up”, or “down”.
Press to enable / disable an on­screen keyboard.
Press to confirm changes.
Press to export databases (key active upon plugging a USB flash drive).
Press to resign form introducing function modifications.
Press to import databases (key active upon plugging a USB flash drive).
Press to add a new record to a database.
Press to move (exit) one level up.
Press to print out a record from a database.
Press to delete a database’s
content.
4. DRYING MODE
The main window of balance software can be divided into 3 sections:
The top section displays data on the active working mode (symbol and name), metrologically
important data and a button for choosing from the functions available for a particular working mode.
The middle section presents the weighing result.
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The bottom section contains supplementary information on the current operation, as well as
function buttons.
Enter drying process menu and set the following parameters:
• Drying process mode and drying process parameters
• Drying process finish mode and finish mode parameter
• Unit for a displayed and printed result
• Interval for measurement printout where the measurements are printed during the drying
process
4.1 MOISTURE CONTENT MEASUREMENT ON A MOISTURE ANALYZER
Measurement of moisture content in a tested sample is performed by determining the loss of mass in a sample by its heating (humidity evaporation).
The Cole-Parmer moisture analyzer has two components: a precision balance and a drying chamber. Compared to standard moisture content determining methods, measurements with a Cole-Parmer moisture analyzer are much quicker and do not require additional mathematical calculations (the result of moisture content is previewed on an ongoing basis during product testing process).
Independent of the moisture content determination method, measurement accuracy is highly influenced by means of sample preparation and selection of testing parameters, such as:
Sample size Sample type Drying temperature Drying time
In practice, the measurement accuracy is not as important as the speed of obtaining a measurement result (control over technological process). Thus, heating a sample with the halogen filament by the moisture analyzer makes the measurement process very time efficient.
Measurement speed can be additionally increased by adjusting the moisture analyzer’s parameters
depending on the tested substances.
Optimum temperature and drying time depend on sample type and size, as well as anticipated measuring accuracy. The selection of drying parameters can only be performed on the basis of test measurements.
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4.2 SAMPLING AND PREPARATION
The sample’s features, its preparation and its size are very important factors influencing the speed and accuracy of the measurement process.
The means of sampling and preparation are extremely important for repeatability of measurement results, as a sample should be a representative part of the tested substance.
The final measurement result is vastly conditioned by precise and considered sample preparation. A sample used for analysis has to represent the total structure of the tested material. The sampling process should determine the sampling means, sample disintegration, particle size after disintegration, sample uniformity and other. The sampling process should be completed as quickly as possible so that a sample does not lose or absorb humidity from the surrounding area.
Applied sampling standards should match individual user needs as well as the requirements of the tested material, its consistency and its sample size.
Number of samples
Increasing the number of tested samples also increases the statistical measurement certainty. The number of samples depends on the uniformity of tested material, its purity, the accuracy of applied measuring method and the anticipated accuracy of obtained results.
Material mechanical reducing for measurements
The applied reducing method should be selected appropriately for the tested material. Substances that are hard and brittle can be cut. Grinding such substances may cause them to heat up and result in humidity vaporization, resulting in unreliable measurement results. Unless a substance can be prepared for measurement in a way besides grinding, any possible moisture content loss should be calculated.
Use of high-silica sand
Ensuring optimum substance drying requires that a sample has the largest possible surface for moisture content evaporation. Test results of moisture content for substance with a glossy surface (e.g., glucose syrup) or with a sheen (e.g., butter) can be much more reliable if the sample is mixed with a dried high-silica sand to improve the measurement’s accuracy and
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repeatability. While using the mixture, a disposable weighing pan with extended brim must be applied to hold a greater volume of the sample.
Grease in a form of paste or melting substances
Such substances require testing with use of a filter made of glass fiber, which considerably increases the active evaporation surface by separating the substance between the fibers. Initial filter drying is necessary only for measurements that require very high accuracy.
Liquid substances
Liquid substances, by creation of drops on their surface caused by surface tension, may render difficulties in drying process. Use a glass fiber filter to shorten the measurement time. The filter causes the tested liquid to separate around the fibers and increase the active evaporating surface. Initial filter drying is necessary only for measurements that require very high accuracy.
Substances with a leather-like structure or that are temperature sensitive
Use a glass fiber filter. While testing, a substance is placed on a drying pan, and the sample surface is covered with a filter, which protects the sample from direct heat radiation. In such case, the sample is heated by convection, which is milder than radiation.
Substances containing sugar
The surface of such substances may caramelize during the testing procedure. Therefore, use a thin layer of the sample and a moderate drying temperature.
Sample distribution on a pan
Loose materials
Dried in their natural state, i.e., in their natural form or disintegrated. Sample disintegration causes smaller dispersion between the following measurements. The sample mass should not be too high, and the sample should be evenly spread on the whole surface of the drying pan.
Liquid substances
Semi-fluid substances are dried in their natural form. Large amounts of oils occurring in some substances makes moisture content determination difficult. In such cases, use additional components that
increase the sample’s active surface and aid in the moisture content
releasing process from a sample. Such components are high-silica sand, blotting paper or a filter.
Before drying a tested substance, dry the additional component so that its humidity is close to zero.
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Solid objects
Depending on a solid object’s structure (dense or loose), the time it
takes to determine moisture content will vary. The size of the solid’s
surface determines the speed of drying process and measurement reliability. Thus, the surface of a solid object should be as large as possible. Since solid objects release moisture through their outer surfaces, sample thickness is another important factor.
4.3 SELECTING OPTIMUM MASS FOR A SAMPLE
The sample mass influences the accuracy of the measurement result and measurement time. A higher mass of a sample means a higher amount of moisture content that needs to evaporate, and therefore measurement time is longer.
Obtaining a short measurement time is feasible for a small sample mass, but sample mass cannot be too small, as it may negatively influence required measurement accuracy.
Influence of Sample Weight on Measurement Result Repeatability
The sample mass considerably influences the repeatability of measurement results obtained with a moisture analyzer. The relation between sample mass and repeatability is presented in a table below.
Sample weight
Repeatability
~ 2g
±0.05%
~ 10g
±0.01%
The above data refers to a model, uniform sample containing no moisture due to the evaporation process and showing no signs of decomposition (e.g., wet high-silica sand).
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The result’s uncertainty cannot be avoided, due to the sample’s nature and moisture analyzer
repeatability. In practice, it means that an obtained measurement result may exceed the repeatability values provided above.
4.4 DRYING TEMPERATURE
The drying temperature has the largest impact on drying time. The temperature value depends on the type of dried substance. Too low a drying temperature causes too low moisture content evaporation and an under-dried sample and consequently an unnecessary extension of measurement time. Too high a drying temperature causes a dried sample to burn and overheat, as well as chemical decomposition. The drying temperature of traditional methods using a furnace is specified in applicable industry or company standards. Unless standards apply, then the temperature should be adjusted by tests.
On selecting the drying temperature value, proceed as follows:
Determine the moisture content in a sample.
Determine the temperature of the substance chemical decomposition by tests.
Compare the result obtained with a moisture analyzer with the one using the traditional method.
When drying a sample with high moisture content, it is possible to shorten the measurement time by selecting quick or step drying mode. Then the majority of moisture content is released when the drying temperature is higher than set. After some time, the temperature is lowered to the set value and maintained until completing drying process.
4.5 DRYING PROCESS PROFILE AND DRYING PARAMETERS
The default display configuration in drying mode.
The software of the moisture analyzer enables user to select one of four drying profiles:
Standard
Quick
Mild
Step
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Standard profile
The most frequently used of all drying profiles. It enables accurate determination of moisture content in a dried sample.
Mild profile
Used for drying substances that are sensitive to rapid heat emitted by filaments operating at full power in the initial stage of drying process. This profile prevents substances sensitive to heat from decomposing by mild temperature increase in a set amount of time (the time interval has to be selected by tests). The Mild profile is recommended for drying leathery samples.
Fast profile
Recommended for drying samples whose moisture content varies from 5% to 15%. In the initial stage of the Fast profile, heating takes place at full power of the filaments, causing heating the drying chamber to increase the temperature (maximum temperature value is higher by 30% from set drying temperature). Overheating compensates for heat loss during the evaporation of large moisture content in the test’s initial stage.
Step profile
Enables determining up to three steps with random drying temperatures. The Step profile is recommended for drying substances with moisture content over 15%. Temperature and heating time in each step have to be adjusted by tests.
Current drying parameters are displayed as symbols in the middle of the information field. To perform the procedure in accordance with other parameters, enter the settings and modify the respective parameters’ values.
Enter drying process menu and set the following parameters:
Drying process mode and drying process parameters
Drying process finish mode and finish mode parameter
Unit for a displayed and printed result
Interval for measurement printout where the measurements are printed during the drying process
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Enter the drying parameters settings and select mode type. Upon selection, the fields enabling users to set profile parameters are displayed. Parameters depend on the selected mode.
Drying Process mode parameter takes the following values:
Standard drying profile – Set the drying temperature at which a sample is to be tested.
Fast drying profile - Set both heating time in a temperature higher than the preset one and the temperature for which a sample is to be tested.
A specific feature of this drying profile is the fast increase of drying temperature in short period of time. When compared to the preset temperature, the drying temperature rises 30% within 180 seconds, and it is maintained at this level for a specified amount of time before dropping to the temperature value preset in drying profile parameters.
CAUTION: For the Fast profile, set the drying temperature and heating time
30% higher than the set temperature. Heating time is measured after reaching the set temperature.
Mild drying profile - Set the length of time within which the moisture analyzer is to reach
the specified temperature and temperature for which a sample is to be tested.
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Step drying profile - Set the heating time in temperature number one, first step
temperature, heating time in temperature number two, second step temperature and the temperature in which a sample is to be tested.
CAUTION: For the Step profile, set the step temperature 1 and 2 and the temperature of
drying. Also set the heating time, in particular indirect temperatures (1 and 2). Time for heating in particular steps is counted from the moment of reaching a preset temperature for a particular step.
4.6 DRYING TIME
Drying time is set by selecting one of the available finish mode criteria. This means that a moisture analyzer must meet preset criteria (one of the requirements: mass over time, time) to automatically finish the drying process.
The end of the drying process can be triggered by the amount of time independent of loss in mass. This criterion is used for substances that may decompose during drying process and their mass does not reach constant value.
The second criterion is loss in mass (less than 1 mg) in a defined amount of time.
Automatic finish mode (Auto switch off mode) - the operator can choose between various types of finish modes:
Automatic 1 (change 1mg/10s)
Automatic 2 (change 1mg/25s)
Automatic 3 (change 1mg/60s)
Automatic 4 (change 1mg/90s)
Automatic 5 (change 1mg/120s)
Time-defined finish mode - drying process finish takes place when a set amount of time elapses independent of the measurement result (maximum drying time 99 hours 59 minutes).
Manual finish mode - the operator ends the drying process manually by pressing the <START/STOP> key on the moisture analyzer’s display.
Defined finish mode – user-defined criterion. The operator determines the limit value for loss of mass and time in which the loss of mass must not exceed a preset value. As the moisture analyzer reaches the set criterion, it automatically finishes the drying process.
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User defined 1 (Δm – change of mass and Δt – change of time must be given, the former in mg, the latter amounts to 120 s. maximally)
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User defined 2 (set moisture content change ratio %M over time 60s)
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4.7 DRYING PROCESS
Drying process settings are displayed in the information field above the buttons.
Press the <Start> button to run the drying process.
Prompts and messages are displayed. Follow the prompts to correctly prepare the sample and to perform the process of humidity content determination for a tested sample.
The program prompts you to prepare the weighing pan. A symbol on the drying chamber status is displayed.
Place the disposable weighing pan in the pan handle and deposit it on the bracket. The display shows the disposable pan weight.
Close the drying chamber to provide stable ambient conditions while taring.
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Press > to zero the weighing pan weight.
When the indication equals zero, the next prompt is displayed and the symbol for the drying chamber status changes.
Deposit the sample on the weighing pan. Sample weight should be selected on the
basis of prior experience and tested material characteristics.
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On sample preparation and result stabilization, close the drying chamber and
confirm the operation by
pressing
>. The
drying process starts automatically.
Information on the drying process is displayed and the moisture analyzer proceeds according to set parameters. The required mass measurements and calculations of the tested sample moisture content are performed where the calculations are a result of mass change. At process start, a printout header is sent to the selected interface according to the set printout options in parameter group Drying Process Report/Header).
During the drying process, the current weight results and information on the process are displayed (test duration, drying chamber temperature, etc.). According to set printout options in parameter group Drying Process Report/Measurement, measurements are sent to a selected communication port in preset time intervals (Interval).
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