Fritsch GTM Operating instructions

Brand: Fritsch

Model: GTM

Category: Measuring & layout tools

Type: Operating instructions

GTM-System

FRITSCH

ZERKLEINERN PARTIKELMESSEN TEILEN MILLING PARTICLE SIZING DIVIDING ZERKLEINERN PARTIKELMESSEN TEILEN MILLING PARTICLE SIZING DIVIDING ZERKLEINERN PARTIKELMESSEN TEILEN

Instruction manual

Gas-Pressure- and

Temperature-

Measuring-system

„GTM“

for

Laboratory-Planetary Mill pulverisette 5

as well as

Laboratory-Mono-Mill pulverisette 6

GTM-System

FRITSCH

ZERKLEINERN PARTIKELMESSEN TEILEN MILLING PARTICLE SIZING DIVIDING ZERKLEINERN PARTIKELMESSEN TEILEN MILLING PARTICLE SIZING DIVIDING ZERKLEINERN PARTIKELMESSEN TEILEN

Fritsch GmbH

Laborgerätebau

Industriestrasse 8

D - 55743 Idar-Oberstein

Phone: *6784/ 70-0

Fax: *6784/ 70-11

E-Mail: info@fritsch.de

Internet: http://www.fritsch.de

Artikel-No. 50.212.00

Artikel-No. 50.217.00

Edition 09/2001

Fritsch GmbH, Laborgerätebau has been certificated by the TÜV-

Zertifizierungsgemeinschaft e.V. on June 24, 1994.

An audit certificated the accordance of the Fritsch GmbH to the DIN

EN ISO 9001.

The enclosed declaration of conformity calls the directives which the

GTM-system corresponds to. This permitts us to mark the instrument

with the CE-Sign.

GTM-System

FRITSCH

ZERKLEINERN PARTIKELMESSEN TEILEN MILLING PARTICLE SIZING DIVIDING ZERKLEINERN PARTIKELMESSEN TEILEN MILLING PARTICLE SIZING DIVIDING ZERKLEINERN PARTIKELMESSEN TEILEN

Table of contents

page

1 General Information / Introduction...........................................................1

1.1 Notes about Operating Instructions .........................................................1

1.2 Brief Description of the Instrument ..........................................................1

1.2.1 Applications.....................................................................................1

1.2.2 Method of Operation .......................................................................2

1.2.3 The measure principle ....................................................................2

1.2.4 Components of the measure principle ............................................2

1.3 Technical data .........................................................................................3

1.4 Sicherheitshinweise .................................................................................4

1.5 Electrical Safety .......................................................................................4

1.6 Operators.................................................................................................5

2 Installation ..................................................................................................5

2.1 Unpacking................................................................................................5

2.2 Erection....................................................................................................5

2.3 Electric connection...................................................................................5

2.4 Software-installation ................................................................................5

2.4.1 Prerequisites for the installation of the software .............................5

2.4.2 Software-installation........................................................................6

2.5 Configuration the radio-module ...............................................................6

2.5.1 Configuration-switch 1 (ON / OFF) .................................................7

2.5.2 Configuration-switch 2 (stand by time)............................................7

2.5.3 Configuration-switch 3 (One - or Two-radio-modules)....................7

2.5.4 Configuration-switch 4 (Service-switch)..........................................7

2.5.5 Locking the radio-module................................................................7

3 Service of the program..............................................................................8

4 Measurement enforces..............................................................................8

4.1 Loads the radio-battery (accumulator in radio-module)...........................8

4.1.1 Undervoltage-ad..............................................................................8

4.1.2 Recharging......................................................................................8

4.1.3 Accumulator-lifespan ......................................................................9

4.2 Filters .......................................................................................................9

4.3 Measurement enforces............................................................................9

4.3.1 One-radio-module .........................................................................10

4.3.2 Two-radio-module .........................................................................10

4.3.3 Transfer of measuring datas.........................................................11

4.3.4 Stop Measuring .............................................................................12

4.4 See Measurig diagram...........................................................................12

5 Measurement appraises ..........................................................................13

6 Detailed informations ..............................................................................14

6.1 GTM Software........................................................................................14

6.2 Operating modes and configuration ......................................................14

6.2.1 Data-reduction ..............................................................................14

6.2.2 Stand by........................................................................................15

6.2.3 Automatic measuring speed adaptation........................................15

6.2.4 Automatic pressure-measuring range-switch ...............................15

6.2.5 One radio-module transmission....................................................15

6.2.6 Two radio-module transmission....................................................16

6.2.7 Low-voltage-mode ........................................................................16

7 Cleaning....................................................................................................17

8 Maintenance .............................................................................................17

9 Warranty....................................................................................................18

10 Troubleshooting Checklist .....................................................................19

11 Accessories / spare part..........................................................................19

GTM-System page 1

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ZERKLEINERN PARTIKELMESSEN TEILEN MILLING PARTICLE SIZING DIVIDING ZERKLEINERN PARTIKELMESSEN TEILEN MILLING PARTICLE SIZING DIVIDING ZERKLEINERN PARTIKELMESSEN TEILEN

1 General Information / Introduction

1.1 Notes about Operating Instructions

• The copyright to these technical documents is the property of

Fritsch GmbH, Manufacturers of Laboratory Instruments.

• These operating instructions are not to be reprinted or copied wi-

thout the express approval of Fritsch GmbH.

• Please study these instructions carefully before operation.

• All operators must be familiar with the contents of the operating

instructions.

• The GTM-System was designed with the user's safety in mind,

however inherent risks cannot be excluded. Follow the advices in

these instructions to avoid risks to users.

• These operating instructions do not constitute a complete techni-

cal description. They describe only the details required for safe

operation and maintenance for usage under normal conditions.

• Heed the instruction-manual of the Laboratory-Planetary-Mill pul-

verisette 5 additionally as well as der Laboratory Mono Mill pulveri-

sette 6.

1.2 Brief Description of the Instrument

1.2.1 Applications

The Measuring System GTM grasps gas pressure and temperature in

the meal-cup during the Mahlens in Planetory Mills simultaneously.

This delivers a variety of statements to the description of the running

comminutions-, mix-, activating -, amorphisierungs - or phase-

conversion-processes.

• The measured gas-pressure contains piece of piece of information

over temperature-alterations on reason of the heat of the meal-

receptacle. It describes the interaction of the implied gas with the

surfaces created with the grinds (adsorption and desorption of ga-

ses) with consideration of the entire powder-volume.

• The measurement of the heat of the system with a temperature-

sensor enables to take the temperature-influence on the gas-

pressure in restricted scope into account.

Slow alterations of raw material states are a fundamental application

during the grinding process, like z.B. the amorphisising of metals.

Such attempts can last many hours, a fast data-reception is not ne-

cessary.

A second important application of high energy grindingis the attain-

ment of phase-educations or alterations because of the mechanical

Legierens. On this occasion, extremely quickly running reactions, that

can be drawn by the GTM-System with big measure installment, can

occur.

GTM-System page 2

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1.2.2 Method of Operation

As a micro-electronic silicon-membrane-pressure-sensor and a tem-

perature-sensor are used detektierende prefabricated part, that in a

modified meal-receptacle-cover (station-module) is integrated. The

measurements handed over by the sensors are radioed digital to one

outside the mill of situated and recumbent receiver.

In the receiver, the data-telegrams ary tested for wholeness and cor-

rectness and ary transferred over at serial RS 232 - interface to at pc.

The computer-program calculates the measurements from the emp-

fangenen data and represents these in dependence the time graphi-

cally. The measurements can become curtain and with for example

Spreadsheets is processed.

The power supply of the station and the sensors takes place through

up again-loadable accumulators in the station-module.

Also the data of two meal-cups can be appraised simultaneously - to

it is two Radio-modules necessary.

1.2.3 The measure principle

The measure principle is based on it that pressure and temperature

are directly proportional in an ideal gas (volumes and mass of the gas

is steadily p = const * T).

The transition of the process-heat of the powder on the gas takes

place on reason the big powder-gas-contact-surface and the deep

Durchmischens when grinding directly, so that is to be registered

temperature-alterations in the powder as pressure-alterations, appro-

ximately without time-postponement.

The heat-depositing at the meal-cup leads to his relative tempera-

ture-alteration. The temperature of the meal-receptacle-cover is

measured additionally to the measurement of this temperature-

alteration.

1.2.4 Components of the measure principle

The measure principle consists of one or two station-modules, that

Receiver and the measurement-representing - and storing software

as well as necessary accessories.

Antenna

Meal-cup-screw,

Disk

radio-modules (cover, inter covers,

filter-covers)

O-Ring

bowl

radio-modules and bowl

GTM-System page 3

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1.3 Technical data

Evaluation-software runs with WINDOWS 95© operating systems

Dimensions receiver 1100 x 830 x 830 mm (h x w x d)

Pressure measure-range1 0kPa – approx. 130kPa

Pressure measure-range2 approx. 130kPa - 400kPa

Allowable pressure in the bowl 0 - 1MPa

Measurement-dissolution < 0,65kPa

Conversation-time of the pressure-sensor < 1ms

Measure speed until 100 values / s

Temperature range of the radio-module 10°C - 70°C

Business-time with full accumulator up to 80h

Data-transfer 8Bit serial

Radio-transfer for EC 433MHz-Band, PCM,

Power of radio-module 10mW

Reach the radio-transfer type. 15m in buildings

Mains voltage ~200-240V ±10%.

receiver-input voltage 12V DC

receiver-power consumption 300mW

receiver camp-temperature 0... 40°C

relative humidity < 70%

At most allowable short-term (< 2s) reaction-heat the

Powder-system's 30kJ

Change pressure-measurement: < ± 1%

Temperature-dependence < ± 1,25%

Pressure hysterese < ± 0,25%

GTM-System page 4

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1.4 Sicherheitshinweise

• The instrument can only to be used for the purpose described

• Use only original accessories and original spare parts. Failure to

do so may call into question the performance of the instrument.

• The operators must be familiar with the contents of the operating

instructions.

To this end, for example, the operating instructions must with the

instrument.

• Do not remove labels

• Behaviour at all times must be such as to strictly preclude any ac-

cidents.

• Unauthorized modification of the instrument or any part thereof will

result in the loss of the conformity to European directives which is

asserted by Fritsch and the warranty.

• Use the instrument only inside. The air must not contain any elec-

trical conductive dust.

• Use the Meßsystem only in the Planetary mills „pulverisette 5 “or

„pulverisette 6 “the FRITSCH Ltd.

• The instrument is not explosion-proof and is unsuitable to grind or

sieve materials which are explosive, combustible or promote com-

bustion.

• They drive the GTM system in the fixed business -parametern.

• Don't use the GTM system unsupervised.

• Keep at eye on movements of the mill and correct if necessary the

mass-distributions.

• Keep an eye on slide-movements of the meal-cups and increase if

necessary the vigour of the chuck.

• Replace screws with worn out screw thread.

• Use the Meßsystem only in dry surroundings.

• Heed the security-hints of the instruction manuals pulverisette 5

and pulverisette 6.

• Calculate the enthalpie of the possibly originating New connection

before the use of the GTM system. Guarantee that grist is filled

into the meal-cup only so much that the set free heat-quantity

doesn't exceed 30kJoule!

• Befüllen you the meal-cup with application of the GTM systems

never with liquids.

• Don't expose yourself to the emitted radio power unnecessarily.

• Before switching on of the mill the drawer-cable from the station-

module withdraws!

1.5 Electrical Safety

Please heed the at the input voltage of the receivers!

Please put plugs and kabel only into the intended sockets.

GTM-System page 5

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1.6 Operators

• No one other than authorized persons should operate the instru-

ment and it must be serviced and repaired by trained specialists.

• No one suffering from medical problems or under the influence of

medications, drugs, alcohol or overtiredness should be permitted

to operate the instrument.

2 Installation

2.1 Unpacking

Check that the items supplied correspond to your order.

2.2 Erection

• Use instrument only inside

• Ambient -temperature of the receivers 20-40°C lies.

• Put the Receiver beside the PC to be used. Put the interface-

management (9-pole pipes) into the COM 2 at the PC and at the

interface of the receiver. For another serial interface in the pro-

gram the default alters.

2.3 Electric connection

Compare the voltage - and current-values stated on the type plate

before the connection of the plug-power-supply with mains voltage.

Use a plug-power-supply with another mains-voltage as 230V

AC, with an output voltage of 12V DC and power of 300mW.

Put the latch-plug of the plug-power-supply into the rearside power

supply-socket of the receiver and that plug-power-supply into a sok-

ket.

Switch on the receiver (switch „power “presses), the green LED shi-

nes beside the switch right.

2.4 Software-installation

2.4.1 Prerequisites for the installation of the software

• PC IBM compatible (from 80486)

• at least 8MB main memory

• at leases 3MB free hard disk-storages

• a serial interface with at least 19200 bauds transfer-installment

• Disk drive 3 ½S “HD

• Windows 95

You use for the installation

1. the two included diskettes GTM-Software and

2. the diskette station-module.

(with 2 station-modules 2 diskettes)

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2.4.2 Software-installation

• Start the PC and the Windows 95

• Put in diskette software GTM-System

• The program a:\setup.exe executes and follow the installation-

instructions of the program.

radio-modules announce

• Put in the diskette with the radio-module (number)

• Start the program GTM from the program-group GTM

• In the menu options choose the point SBG

• Choose the radio-module-number on the diskette

(example: 23132011.sbg)

Declare further station-modules equally.

Max. 10 radio-modules can be announced.

Keep an eye with the purchase of more radio-modules on same radio

frecuency. You necessarily declare the serial number of the existing

radio-modules to it with the order!

initialization-file „gtm.ini “

The initialization-file contains all important defaults over the radio-

moduleses to be used. These are set aside with desk of the station-

modules in the GTM.INI.

The file must be altered after the rotational calibration of the station-

module by repeated declaring with it of the station-module of enclo-

sed diskette.

Interface

Standard, one uses the COM2-Schnittstelle for the GTM-System.

For an others serial interface, you choose under menu-option the

command port and put in the wished interface. This attitude sticks

gets with latest-type of the program.

2.5 Configuration the radio-module

The radio-module is configured by configuration-switches on the con-

ductor plate of the station-module. The configuration must be re-

tained during a measurement.

• radio-module of the meal-cup unscrews (4 screws)

• cover unscrew (2 screws). The cover lateral turn away.

Before rearranging of the configuration-switches drawer-cables from

station-module pulls!

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The 4 configuration-switches now can be altered e.g. with a pen.

Do not touch modules of the conductor plate when switching the

configuration-switches.

radio-conductor plate with

configuration-switch

switch 1 and 2

switch 3 and 4

2.5.1 Configuration-switch 1 (ON / OFF)

With delivery, configuration-switch is 1 in position OFF.

To work with the radio-module, put the counter on ON. At Microcon-

troller is now switched on and is taken on the measure -, radio - and

charge management.

After switching on for the first time, the radio -module should be loa-

ded at least 15 hours.

When longer business-tracing (>3 months) the configuration-counter

1 in position OFF puts. So, a deep discharge of the built-in accumu-

lators is prevented: destruction-danger.

2.5.2 Configuration-switch 2 (stand by time)

OFF short stand by time: 22 ∗18 ms

ON longer stand by time :25 ∗18 ms

Also see chapter Stand by

2.5.3 Configuration-switch 3 (One - or Two-radio-modules)

OFF Two-radio-modules (Zweisenderbetrieb)

ON One-radio-modules (Einsenderbetrieb)

Two radio-modules and a receiver are put in, both station-modules

into the mode two-radio-modules switches.

Also see chapter One - or Two-radio-modules

2.5.4 Configuration-switch 4 (Service-switch)

Leave Switch 4 always on ON. Alternatively, the pressure-

measurements become invalid and not usable.

2.5.5 Locking the radio-module

Screw in the 2 screws with feather-fights and disks. (with hand-

strength attracts)

GTM-System page 8

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3 Service of the program

The reason-knowledge of Windows are presupposed with the pro-

gram-service.

Menu options

• Port

Election interface (COM 1... 4) (sees software-installation)

• Inter-stores (if in the program existing)

Program stores all 10 min or every hour the measurements.

• SBG

Desk of radio-modules (sees software-installation)

Menu windows

Order of opened files

Menu help

Help-texts standard-ordering of the operating system. This is no help

for functions of the program.

4 Measurement enforces

4.1 Loads the radio-battery (accumulator in radio-module)

4.1.1 Undervoltage-ad

• If the voltage sinks under a fixed value, the computer-program

reports „Akkus/Batterien nachladen“. The radio-module can still

measure in the first-time appearance of the news some hours.

Accumulators too approximately 2/3 empty.

• After the ad „Achtung! Stations in the Unterspannungs-

Sendebetrieb “takes place anuses approximately 1000 data-

programs the switch off of the radio-modules.

4.1.2 Recharging

• Recharge the accumulators before longer comminution.

• To recharging of the accumulators, the station-module must be in

silence. Put the battery-drawer-kabel into the station-module and

at one of the two drawer-sockets at the receiver.

• The assigned green ad blinks three times shortly and shines du-

ring the store brightly.

• If the accumulators are full, the green ad goes out

• A overcharging of the accumulators is impossible.

• Recharging of empty accumulators lasts approximately 17 hours.

• After a day, you should finish the recharging/reloading by traction

of the plug from the receiver.

After switching on the ON / OFF konfiguration-switch and subsequent

charging becomes always the accumulators approximately 5 hoours

charged. If this is done several times shortly consecutively, the dan-

ger of the overload exists. Capacity-loss of the accumulators is the

consequence.

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4.1.3 Accumulator-lifespan

• The lifespan of the accumulators decreases with overheat of the

station-module.

• The accumulators should preferably is unloaded before the re-

charging.

• The station-accumulators can reach with neatly application up to

1000 Cahrging-Recharging-cycles. See chapter recharging

4.2 Filters

• The two slit-screwing (underside radio-module) out-turns.

• Remove plate

• Filters put in (work-page is already put in a filter)

• Screw plate again

Use the radio-module only with filter.

Change the filter with comminution of different materials in

principle.

Check the filter after each measurement and change this if ne-

cessary from.

4.3 Measurement enforces

• Test

♦ Position the configuration-switches (see installation)

♦ condition of the accumulator (full/empty)

♦ Filters

♦ Is radio-module fixed

• Fill grinding-bowl

(see instruction manual of the mill)

• Check the sealing of the grinding bowl

(if damaged change)

• Screw radio-module onthe grinding bowl (4 Schrauben)

• Put grinding bowl in the mill

• For fixing the grinding bowl in the mill see instruction manual oif te

mill

• Switch on receiver and PC

• Start programm

• Call from Menu DATEI the point NEU

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4.3.1 One-radio-module

• In accordance with the ridge digit of the radio-modules-number

choose (see picture below):

• Choose radio-module-number:

- left textfield: radio-module-number „1“ at fist position

- right textfield: radio-module-number „2“ at fist position

If there are no radio-module-numbers to choose:

- you did not pay attention at the digit at first position (see

picture above) or

- there are no radio-module-numbers installed (see chapter Soft-

ware-installation)

• Klick WEITER

Compare the radio-module-numbers (number.SBG) with the ra-

dio-module-numbers on the radio-module.

4.3.2 Two-radio-module

• Choose two radio-modules (see picture below:)

• Choose radio-module-number:

- left textfield: radio-module-number „1“ at fist position

- right textfield: radio-module-number „2“ at fist position

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If there are no radio-module-numbers to choose:

- you did not pay attention at the digit at first position

(the digit at first position has to be different in both textfields,

in both textfields has to be chosed one radio-module-number)

- there are no radio-module-numbers installed

(see chapter Software-installation)

• Klick WEITER

The fourth digit of both radio-modules must immediately be

(same reception-frequency for the Receiver)!

The station-module-numbers check (Nummer.SBG) and the

numbers attached on the radio-modules!

4.3.3 Transfer of measuring datas

• Write down from additional datas: double-click with the mouse un-

der diagram

• Pull the plug out of the station-module, it is activated by it

• Reception of the measuring datas is shown by a yellow LED at the

receiver (the yellow LED alters the switch-condition in time-

intervals according to configuration approximately 10s...70s)

• Set Speed and grinding time at the mill

• Start measuring: press reset-button at receiver

• Start the mill

Observe instruction manual of the mill!

Check temperature of the radio-module. Heat over 70°C do not

exceed. If necessary pause to cool of.

If the temperatur of the radio-module is to high the GTM program re-

ports „Temperaturüberschreitung an der Senderbaugruppe“.

Tip:

With swift energy-releases in the meal-cup, one reaches a restricted

refrigeration of the cup and the station through air-refrigeration in the

moved mill.

• Reception of the measure datas at the Receiver or PC observe.

On reason of ball-hit-movements, the measurement can fluctuate

in restricted intervals and consequently short-term more intensive

programs of the measurements evokes.

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4.3.4 Stop Measuring

• Choose from Menu Datei point „Messung beenden“.

• Switch off the mill

• Leave the grinding bowls in the mill to cool of.

• Switch off radio-module

- plug in switch plug or charging kabel in radio-module or

- recharge accumulators with the receiver recharge:

plug in charge kabel in radio-module and receiver.

• Take the grinding bowls out of the mill when cooled of

• Clean grinding bowl, balls and filter cover if necessary.

See chapter Cleaning

• At the end of measuring save datas :

Menu Datei option

„Speichern“ save

„Speichern unter“ save as

4.4 See Measurig diagram

Saved measuring diagrams can be opened: Menu Datei

Additional datas can now be altered: double-click with the mouse

under diagram

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5 Measurement appraises

Measurements and addition-information are stored in the ASCII-

format. To the evaluations and for calculations, spreadsheets are re-

commended like EXCEL or ORIGIN.

You find in the protocol-head of the measurement-file

• general information,

• the addition-information and

• the time and measurements in table-form.

Example of a GTM-file:

GTM-Daten

V 01.01 -Version der GTM-Software

Start -Starttime

3 -1: radio-module 1 -2: radio-module 2 -3: two-radio-module

13111002 - serial number of radio-module 1

23111001 - serial number of radio-module 2

100Stk/10mm -Informations to radio-module 1 (e.g. number of balls)

Argon - gas

250 -speed in rpm

10 4 26 0 0 - Amount of powder

Fe - powder material 1.

CuO - powder material 2.

C - powder material 3.

50Stk/10mm - Informations to radio-module 2 (e.g. number of balls)

Argon - gas

250 - speed in rpm

15 21 0 0 0 - Amount of powder

Ti - powder material 1.

C - powder material 1.

6 - number of saved data telegrams of radio-module2

3121 914 232 -1.column time[ms], 2.column pressure [hPa],3. column temperature

[°C*10]

6522 914 232

15588 914 232

24592 926 232

26523 926 238

32626 914 238

5 - number of saved data telegrams of radio-module1

8065 1012 332 -1.column time[ms], 2.column pressure [hPa],3. column temperature

[°C*10]

17966 1012 332

26870 1012 332

35563 1012 332

44632 1018 336

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6 Detailed informations

6.1 GTM Software

The updating of the diagram during the measurement takes place

after arriving of new measurements within a second.

Measuring datas are not joined at the time-axis but is represented

by new displaying of the time-axis. On some older computers, the

picture-construction can be slowed strongly by much measuring

points. About nevertheless in the Multitasking, to can-put, works you

the program into the background (rake-time for picture-construction

slips so)

6.2 Operating modes and configuration

The GTM-System is equipped with an automatically working measure

and radio-management:

• efficient data-reduction

• automatic adaptation of the measuring speed at the signal-course

(measuring speed adaption)

• Increase the business-duration with an accumulator-freight

through two preselectable stand-by modes

• Pressure-measurement in two measurement ranges, that are

switched automatically,

• If the voltage of the accumulators sinks during the business under

a certain value, switches the radio-modules in the low-voltage-

mode.

• Because of the timewise variable scanning the measurements

and the timewise variable program of data-telegrams, in which

you can intervene only negligibly through configuration of the sta-

tion-module, gets you measurement with different temporal

spacings to each other. Keep an eye with the evaluation of the

diagrams on the representation as point-diagram and with the

piece of information of that especially, by time stood on possible

not observed times during the comminution (please see stand by

mode).

6.2.1 Data-reduction

The radio-module immediately sends measurements, if a significant

measurement-alteration is available. The alteration of the digitized

measure signals is crucial on this occasion (at least three Digit in the

stood by mode 1, four Digit in the stood by mode 2 and five Digit in

the low-voltage-mode).

Additionally, the compulsory transmission of the momentary measu-

rement takes place after 27 Measures (time depends also from the

automatic measuring speed adaption and amounts to according to

stood by mode approximately 10s bzw. 70s), by what slow measure-

ment-alterations are actually represented and also the function-proof

of the GTM systems takes place. The data-reduction is enforced au-

tomatically and is been adjustable from the user.

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6.2.2 Stand by

Stand by, the business-time of the station-module extends with an

accumulator-freight. Two stand by times to the selection (25 (18ms-

lang or standard-attitude: 22(18ms-kurz). In the stand by no measu-

rements are interrogated and are saved energy in the station-module.

A measurement-alteration takes place it after course stand by, so

that becomes after different criterions stand by adapted by the auto-

matic measuring speed adaptation or retained.

6.2.3 Automatic measuring speed adaptation

The last three measured measurements are set aside in a shift regi-

ster. These three between-stored measurements deliver a statement

over the momentary signal-dynamics and use for the automatic mea-

suring speed adaptation. This measuring speed adaptation becomes

is done by alteration the stand by time, that in the borders from stand

by = 0 (continuous measuring (12ms)) and the maximum stand by ti-

me (two modes preselectable: 25x12ms or 22x12ms) takes place.

• If the comparison leads present measurements to the result bet-

ween the three into the shift register, so that no measurement-

alteration took place, becomes that stood by time up to the achie-

vement of the defaulted border doubles and retains then up to the

next dissimilarity of the measurements.

• The dissimilarity of all three lies, measurements would use before

and amounts to the difference of neighboring measurements a Di-

git in each case (with pressure-measurement depends on the ran-

ge), so the bisection of that takes place by time stood, in each

case up to the low border of that by stand by = 0 (maximum mea-

suring speed of 12ms).

• The difference of the last measurement amounts to one of the

preceding three Digit (in the stood by mode 1) as well as vier Digit

(in stand by Mode 2), the maximum measuring speed will be set.

6.2.4 Automatic pressure-measuring range-switch

To the enlargement of the measurement-dissolution and the diminu-

tion of the relative mistake with the pressure-measurement, the GTM

system is equipped with two measure ranges for the pressure. The

switch takes place automatically with the achievement of fixed direc-

tional-dependent switch-points.

The Meßbereichsumschaltung is not adjustable from the user.

6.2.5 One radio-module transmission

The One radio-module transmission is intended for the normal busi-

ness of the GTM-Systems with one radio-module.

The data-telegram with the pressure - and temperature-measurement

is sent once. Up to 100 measurements per second can be transeffe-

red. The One radio-module transmission should be put in to the ob-

servation of quickly running reactions.

In areas with much radio-traffic and a data-telegram can be mutilated

strong electromagnetic sturgeon-fields so that it is recognized by the

receiver as invalid. Remedy can be, the twofold transmission of data-

telegrams. Switches the station-module into the two- radio-module

transmission to this.

See configuration-switches

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6.2.6 Two radio-module transmission

Into the two radio-module transmission, all measurements are in the

time of-moved a second, by what the measure- and transfer-

installment is restricted on at most 10 measurements per second

sent,

With one receiver, data-telegrams can be received simultaneously by

two station-modules. Both stations broadcast on the same transmis-

sion frequency, with more differently timewise moved second trans-

mission.

Is necessarily for the two radio-module transmission

• radio-modules with different first digits of the serial numbers: ti-

me-lag of the second transmission and

• the same number of the fourth digit (same transmission frequen-

cy).

example: radio-module 1: 13142003 and radio-module 2: 23142001.

To beginning of measurements (start of the PC-Programmes) can

you through selection of the two-station-business both station-

modules „declares “and sees configuration-counters

Advantages:

• faster realization-profit,

• Examination to the reproducible-ness of results,

• Mass-balance of the meal-stations in the routine-business.

• For scientific examinations, you can also the method of the diffe-

rence-measurement at two, under same environment-conditions

running meal-processes realizes.

Disadvantages of the two radio-module transmission are the elevated

energy needs of the station-modules and the clear reduction of the

maximum measuring speed on maximum 10 measures per minute.

Keep an eye with the purchase of more station-modules on same

transmission frequencies. You necessarily declare the serial number

of the existing radio-module to it with the order!

6.2.7 Low-voltage-mode

The voltage of the accumulators is continuesly checked by the radio-

module. If the voltage sinks below a critical value, is switched auto-

matically in the low-voltage-mode. In this mode, the radio-module still

can approximately with the remaining energy 1000 Measuring values

send (maximum three hours).

Takes place approximately according to measurements 3 seconds

with immediate transmission with measurement-alterations of at least

five Digit. Measurements change more inferior or necessary, the

compulsory transmission takes place anuses ten measurements

(approximately after 30s).

Switching in the low-voltage-mode, and the complete relaxing of the

station-modules with empty accumulator becomes visible on the

screen.

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Calibration

The started pressure-sensor-types possess an outstanding long-time-

stability. The application as measuring instrument necessitates an

annual calibration of the radio-module. If the use of the station-

module takes place mainly when reaction-grinding, so a biannual ca-

libration is recommended. To this, you please send the station-

module at the manufacturer. You get back the radio-module with a

current diskette.

The initialization-file contains all important defaults over the radio-

modules to be used. These are set aside with desk of the radio-

modules in the GTM.INI.

The file must be altered after calibration of the radio-module by re-