Moisture Analyzer MA50, MA100 Operating Instructions (2)

ready

Before drying the sample, the following preparations must be completed:

- Adjustment of existing measurement system (if required)

- Sample preparation

- Set the drying program parameters

Adjust existing measurement systems

Due to the ease of use and the shorter analysis time, the moisture measurement method often replaces another drying method (eg oven drying method). In this case, this moisture measurement method should be used to obtain values ​​that are compatible with your standard reference method.

l Hospitality parallel measurement: adopt a new sample and divide it into two parts

l Use your standard analytical method to determine the moisture content of the first part

l The moisture content of another part measured by the moisture analyzer is as follows:
- Fully automatic switching parameters
- Lower temperature setting than oven drying
- Temperature setting for organics: 80-100°C
- Temperature setting for inorganics: 140-160°C

О If the result of the second part does not correspond to the result of the first part

- First, repeat measurements using a different temperature setting
- Then use semi-automatic mode with closed parameters (such as 5mg/30s or asap mode)

Asap stands for "automatic search/autoprogramming." The Asap mode monitors the drying program and when a key is pressed, the analysis expectation value is calculated as a semi-automatic shutdown parameter, which is then stored in the program running parameters.

О If necessary, change the switch parameters:

- Increase endpoint identification: set parameters to 2mg/30s or 5mg/60s

- Reduce endpoint recognition, set parameters to 10mg/30s or 5mg/10s

Sample preparation

Choose a sample

l Select a representative part of the test substance as a sample
- A representative number of independent palms used for quality control
C shows that the trend is sufficient for online control

О Product homogenization before sample preparation. If necessary, use:

- Mix or stir
- Take several samples from several different areas of the product
- Take several samples at intervals

l Take only one sample at a time for the agreed analysis and sample preparation should be as fast as possible. In this way, as a result of analysis at normal temperature, it does not lose or increase moisture.

ОIf you need to analyze several samples at one time, the sample should be sealed and stored in an insulated air reservoir to ensure that the stored conditions do not change the sample status or conditions:
- Hot or volatile substances quickly lose their moisture
- If the stored sample is in a storage tank, moisture will condense on the tank wall
- If the storage tank is too large and it is not fully packed, the sample will exchange water with the air remaining in the storage tank

О If necessary, mix the condensed water with the sample

sample

l When breaking the sample, avoid contact with the heat source: heat source will make the water to feed

l Break the sample using the following method:
- 杵(捣)
- Shredder (see below)
For solid-containing liquids, use the following items:
- Glass mixer
- Spoon (sample spoon)
- Magnetic stirrer

О Use a suitable design for crushing the sample

Easy to use sample tray

l Use only SaiDuo's easy-to-handle sample tray (inner diameter 92mm)
Repeated use of sample trays results in poor repeatability of results:
- There is still residue on the sample tray after cleaning
- Detergent residue will evaporate in the next moisture determination
C. The cleaning process causes scratches on the surface of the sample pan to generate rising heat during the drying process, which can result in a significant rise in the result.

Add sample to sample tray

l Spread a thin and flat layer (2-5mm in height and 5-15g in weight) onto the sample pan;
- Non-tiling of the sample results in uneven heat dissipation
C sample cannot be completely dried
C Measurement time does not have to be extended
C If the sample is too thick, the sample surface burns or forms a shell
The shell formed by C may make it difficult or impossible to remove moisture during drying
C cannot determine and do not know the moisture content of the sample

l Add liquid sample, paste sample or melted sample on glass fiber filter (order number: 6906940); you will have the following advantages:
- Uniform dispersion due to capillary effects
C Avoid liquid foaming and droplet formation
C Large surface makes moisture easy to evaporate
C. It is convenient for the “sea sand method” to dry the sugar-containing, one-layer shell and the surface of the sealed sample. A glass fiber filter is very helpful in this type of assay. Water can evaporate below the surface of the filter. If you place a fiberglass filter on the sample, you avoid or limit the shell formation.

l Has solid shell, glass fiber filter for heat-sensitive samples (order number: 6906940) has the following advantages:
- slight heating due to the sample surface avoiding excessive heat
C Higher temperature settings can be selected
C The sample surface is uniform
C Moisture evaporates quickly
C Excellent reproducibility of fat-containing samples

Avoid shell formation

You can add a solvent to the sample during the measurement to avoid shell formation. The weight of your added solvent does not affect the final measurement.

l When you close the sample room, it will turn on again within two seconds of the sound.

l Add solvent to the sample

l Close the sample chamber and start the assay as usual

Set up the drying program

Purpose: To determine the moisture content of products with special requirements. The parameters of each program can be calibrated separately.

Drying parameters (overview)

o Factory settings

√User-defined settings

slightly

feature

Drying program

- MA100: 30 programs

- MA50: 5 programs

Maximum Function 5 characters The independent name is used as a user ID in the program options and used as a moisture measurement output.

All programs list the list according to the corresponding number.

The heating procedure entertains the moisture measurement of a substance. You can use four heating procedures: standard drying, rapid drying, gentle drying (MA100 only), stage drying (MA100 only)

Standard Drying: The standard drying requires a final temperature input.

Fast drying: Fast drying, you need to enter the final temperature, higher heat production.

Gentle drying (MA100 only): gentle drying, you need to enter the final temperature and the time required to reach the final temperature.

Stage drying (for MA100 only): Stage drying consists of three stages. You need to enter the temperature for each phase, including the time for the first and second programs. The switch parameters will only be activated in the third phase.

Bypass temperature: When the sample chamber is closed, the temperature is set to a fixed value.

Weighing: You can initially enter the limit weight for the sample (minimum and maximum or target with percent deviation)

Measurement start

- Confirm initial stability after pressing the start key (time lag: MA100 optional; MA50 only 2 seconds)

- Manual/Automatic shut-off of the sample chamber: press the start key, time lag, MA100 optional; MA50 only 2 seconds

- automatic control: the use of a remote control as determined by the remote control switch (F1 function key: weighing, starts the next)
- Close the sample room
C has stability
C time lag: 0 seconds
C After the analyzer is activated or after pressing the Next button
C Press TARE button to close
C Open after peeling

Measurement result with switch parameters

- Fully automatic mode

- asap (automatic search / automatic programming) mode: semi-automatic parameter determination

- Absolutely semi-automatic

- Partially semi-automatic

- timing

- Manual

Fully automatic mode: According to the measured curve, the inflection point is automatically ended. The determination is based on the measured curve. The inflection point is automatically ended.

Asap: Determines the parameters of the semi-automatic mode. The automatic parameter determines the closing criterion: semi-automatic. In this case, you need to press the Stop button to end the measurement. The weight loss rate will be calculated and stored as a drying parameter.

Absolutely semi-automatic: The selected unit of lost weight is lower than the determination limit, and the measurement is completed immediately. You need to enter the time unit and lost weight.

Partially semi-automatic: The measurement ends when the lost weight is less than the quantified amount in a certain period of time. You need to enter the time unit corresponding to the initial weight and the lost weight.

At the timing, the measurement is completed when the input time is reached.

Manually, you need to press the stop key to end the measurement.

Weighing resolution: You can select the number of decimal places to display weighing (MA100 only)

- Increase the weighing resolution only during the drying process

- Output on the display and printer

Display mode

The following units are all available for display of measurement results:

- Humidity %L
The number of decimal places is optional (only for MA100 with conversion factor)

- Dry weight (decimal point optional) %R

- Ratio (decimal point optional) %LR

- Lost weight mg

- Residue g

- Residue g/kg

Intermediate result output

At user-defined intervals or by pressing the print key, intermediate results can be output.

For automatic continuous counting of measured values

- For all sequential reception assays, the measured values ​​can be automatically counted

- Press the Next button to store the number

- The number of activations is automatically set to 1 each time.

- Print the determination number at the head of the first measurement

The weight of the sample measured in the previous sample (100% function) is calculated as 100% for the next determination.

4 identification code

For each drying program, enter the identification code (eg Dairy Farm, Berlin, milk powder)

- User-defined output

- Maximum 20 character identification code name (Part 1)

- After the ID key is entered during the measurement run, the relevant value (upper part) can be entered

Factory setting: Drying program can be reset to factory setting

Search program

Store the program in the program (press PROG.

- Keys and keys

- Enter the desired program number and press the number key

- Enter the first or all characters of the desired program number and press NAME

- Include statistics (for MA100 only)

Before activating the TARE peel key: Enter the desired program number and press the PROG soft key.

Print measurement parameters

- Press the print key when the desired program is displayed

> Print out text, more than 20 characters will be truncated.

Additional features

The following features are available in the program memory

- Display program

- Change settings

- Press COPY to copy or rewrite the program

- Press LOAD to download the program

- Print a list of program numbers and program names

slightly

Display measurement data

Overall appearance

Identification code

You can use the code to indicate the current measurement. You can enter 4 identification codes for each measurement.

Each identification code consists of an ordinary and a special name. Both are user-defined. The identifier ID name (left part) is normally normal and can be entered in separate drying programs. The special name is the input of the current measurement and exists only once.

feature:

Enter, change and eliminate the identification function.

Enter the first ID directly using the numeric keys.

Each common ID is up to 20 characters.

Each private identification code is up to 20 characters.

Each logo is printed once at any position.

The generic name printout is left-aligned and the private name printout is right-aligned. If the common name and the private name exceed the character line limit, the private name is printed on the next line. If both the common name and the private name are null characters, the banner is skipped.

Enter the private name, slightly.

mode

The parameters listed in the overview (see previous page) can be temporarily changed under the mode item. Each time the moisture measurement is turned on and off or after the parameters are changed in the program or the start menu, the temporarily changed parameters are deleted and overwritten by the current drying program parameters.

Features: display parameters, change parameters

Temporary change of device display mode example: slightly

Original P37-40 slightly

Example 2: Fast Drying with Fully Automatic Shutdown

The moisture content of 2.5 g of the fine ceramic raw material was measured, and the non-thermosensitive sample was measured as quickly as possible. Once the constant weight measurement is completed, it ends automatically.

Settings (factory settings)

Program Number: 2

Program name: fine ceramic raw materials

Heating procedure: rapid drying

Final temperature: 200°C

Measurement end: fully automated

Displaying results: dry weight

An example of a step diagram

Example 3: Determination of moisture content of 45g skimmed milk powder using Asap's automatic search for mild dryness decision closure criteria (MA100 only). This heat-sensitive sample should be heated slowly to avoid scorching the sample surface. As soon as the final temperature is reached, the analysis ends with asap (auto search/autoprogramming).

Settings (different from factory settings)

Program Number: 3

Program name: skim milk powder asap

Heating procedure: gentle drying

Final temperature: 100°C

Heating time: 5 minutes

Measurement end point: asap: semi-automatic determination of parameters.

The step diagram is abbreviated.

Example 4: Slightly dry with semi-automatic shut-off (only for MA100).

Example 5 is omitted.

"iso TEST" correction/adjustment function

With the following features:

TEST key

Weighing system settings

External Calibration/Adjustment: Factory Defined Weight

External Calibration/Adjustment: User Defined Weight

Internal calibration/adjustment

"repro TEST"

Weigh only

hardware test

Test interface

Heater test

If you remove the sample tray and tray holder from the sample chamber, you have access to the following functions:

TEST key

Heater adjustment

Two-point temperature adjustment

A little temperature regulation

Heater adjustment

And two-point temperature regulator using YTM03MA and temperature adjusting means (accessory) can be corrected and the adjustment of the drying temperature setting unit.

Weighing system settings

More accurate

Purpose: To determine the weight reading and the sample weight (mass) deviation more accurately. Calibration does not need to be changed in the weighing system.

The adjustment is a measure of the deviation between the displayed measurement value and the actual mass (mass) of the sample, or reduced deviation to the lowest possible limit.

Select the correct/adjustment method

Press the TEST key and select menu category Weighing system settings (weighing system settings)

You can choose one of the following ways:

- External calibration/adjustment with factory definition weighing

- External calibration/adjustment with user-defined weighing

- Internal calibration/adjustment

- Repeated test

- Weigh only

Start the required mode: Slightly.

The external calibration/adjustment of the work definition weighing is used: Steps are omitted.

User defined external calibration/adjustment

You can customize one to calibrate/adjust the weight. The external calibration/adjustment must use the national standard to indicate the weight and the margin of error is at least within 1/3 of the displayed accuracy deviation. The weight should be at least equal to 10% of maximum weighing.

See External alignment/adjustment sequence on page 52. For example, omitted.

P54-58, slightly.

Repeatability test "reproTEST" (MA100 only)

purpose

The “reproTEST” function will automatically repeat the test results (based on 6 measurement data). In this method, the weighing system will determine the most important value.

rule

Repeatability is the same weight of material moisture analyzer weighing system loading under constant environmental conditions, the ability to measure the readings are the same.

Repeatability test of the weighing system

Step keys (or instructions) Display/Print

Select isoTEST function

Press the TEST key

Select the "Weighing system setting" function.

Press the > soft key

Select "reproTEST" and confirm.

Press the ∨ soft key three times, then press the > soft key.

Start repeatability test

Press the Start soft key

Displays the number of measurements; 6 measurements are performed.

Displays the standard deviation.

6. End reproTEST, or restart reproTEST.

Press the End soft key

Or press the Start soft key

Print out the test report

hardware test

purpose

The hardware test is to check whether the system is normal when communicating with internal or external devices. These tests are not simple hardware tests.

The following facilities and components must be tested:

-SBI Communication

- Internal printing (option)

- Digital I/O communication interface

- Heater

Perform hardware tests

Step keys (or instructions) Display/Print

Select isoTEST function

Press the TEST key

Select hardware test function and confirm

Press the ∨ soft key,

Press the > soft key again.

Test SBI Communication

Step keys (or instructions) Display/Print

1. Prepare a test connector for the RS232 interface (see pinout diagram)

TxD (second needle) and RxD (third needle)

Select "Hardware tests"

Press the > soft key

Select the "Test interfaces" function and confirm.

Press the > soft key

Select the "SBI communication test" function.

After the test is finished, it will show: Test error or :Test OK

(For example, left, Test error)

(The test will be repeated continuously)

Press the > soft key

5. Exit "SBI communication test"

Press << soft key

Test Internal Printer (Option)

Step keys (or instructions) Display/Print

1. Select "Hardware tests" function

Same as above

2. Select the "Test interfaces" function and confirm

Press the > soft key

Select "Internal printer test" and confirm.

If the test passes:

At the end of the test, the following result will be displayed: Test error

Or: End of test

(in this case: End of test)

Press the ∨ soft key,

Press the > soft key again.

All printable characters will be printed.

Exit the internal printer test.

Press << soft key

Test digital I/O interface

Step keys (or instructions) Display/Print

1. Prepare a test connector for the RS232 interface (see pinout diagram)

Connect the universal key (pin 15) to the digital I/O interface to be measured (pins 16 to 19)

2. Select "hardware test"

See previous page

3. Select the "Test interfaces" function and confirm.

Press the > soft key

4. Select the "Digital I/O port test" function and confirm.

When measuring each interface, "Test error" or "Test OK" will be displayed accordingly. When the last interface is tested, the first interface is restarted.

Press the ∨ soft key,

Press the > soft key again.

5. Exit digital I/O interface test

Press the << softkey.

Test heater

Step keys (or instructions) Display/Print

1. Select "Hardware tests."

See previous page

2. Select "Header test" and confirm.

Press the ∨ soft key,

Press the > soft key again.

3. Start the heater test. The current temperature (eg 138°C) and test time (eg 1.5min) will be displayed.

When the sample box is opened, the test automatically stops until the sample box is closed again.

After a short time, the instrument will reach the set temperature.

Press the Start soft key

4. Exit heater test

Press the CF soft key