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METROTEC GSM Series, Operating Handbook

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METROTEC GSM Series Operating Handbook Download Page 8

METROTEC

8

3.2  Measuring Electronics

The electronic system of the GSM measuring device features the following functions:
Measurement of the partial pressure of oxygen
Generation of alarms
Calculation of the dew point
Calculation of the Lambda air factor
The measuring device is operated through the touch screen.
Inputs and outputs are pre-selected and parameterized by the operator via menus.

3.3  Sensor

The sensor is integrated in the measuring electronics. It consists of the measuring
element made of platinum-plated zirconium oxide, which is required to heat up the
measuring element to ca. 700 degrees Celsius, and a thermal element serving to
record the exact temperature.

4

General Layout

4.1  Description of the Measuring Electronics

The front is divided into several areas representing key panel and display.

Gas pump

Touch-Screen

Fan

Ethernet,
USB,
D-Sub

Ha

ndle

Power supply

Summary of Contents for GSM Series

Page 1: ...Oxygen Measuring and Control Device Typ GSM Series Version 2 2 METROTEC Systems for oxygen measurement GSM touch ...

Page 2: ... EU RoHs 2011 65 EU This device complies with following standards EN 61010 1 EN 61000 6 4 EN 61000 6 2 EN 63000 Description of measures taken to assure compliance Quality management system DIN EN ISO 9001 2015 No 12 100 27736 TMS This declaration becomes invalid if changes are made without our consent Kirchheim Teck 07 10 2019 Place Date Signature 2019 METROTEC GmbH Heinkelstraße 12 D 73230 Kirchh...

Page 3: ...asuring Device off 16 6 SELECTING THE MEASURED VALUE 16 6 1 O2 17 6 2 Log O2 18 6 3 Dew Point 19 6 4 Lambda 19 6 5 O2 Red O2 in H2 20 7 PARAMETERISATION 21 7 1 Level 0 22 7 2 Level 1 23 7 3 Level 2 23 7 4 Level 3 23 7 5 Menu Structure 24 8 CONFIGURATION 31 8 1 Enabling Configuration 32 8 2 Correcting the Measured Value 33 8 3 Setting the Alarms 34 8 4 Setting the Trend Graphic Window 34 8 5 Defini...

Page 4: ...ensure that the power supplies concur with the details listed on the nameplate All of the covers needed to ensure that the unit cannot be touched when operating must always be fitted You must consider the effects of the overall operation and take the necessary precautions if the unit will be linked up with other equipment and or devices before you switch on Parts and surfaces will occasionally bec...

Page 5: ...the occurance of leakage corrosion condensation etc damage could be done to the equipment and incorrect measurement results be indicated and so it is essential that all parts of equipment be regularly serviced The oxygen sensor and its accessories are subjected to thorough quality control in accordance with DIN ISO 9001 in the course of their manufacture and testing They must only be installated a...

Page 6: ...METROTEC 6 ...

Page 7: ...ose oxygen content is to be measured The mechanical construction of the sensor prevents contact between the two gases so that there is no risk of their being intermixed Depending on the application concerned heated or unheated sensors are used Unheated sensors are generally used in furnaces while heated sensors are used for applications where the gas to be measured is at a temperature of less than...

Page 8: ...e selected and parameterized by the operator via menus 3 3 Sensor The sensor is integrated in the measuring electronics It consists of the measuring element made of platinum plated zirconium oxide which is required to heat up the measuring element to ca 700 degrees Celsius and a thermal element serving to record the exact temperature 4 General Layout 4 1 Description of the Measuring Electronics Th...

Page 9: ...corrected as required see Operating Instructions Correcting the Measured Value After heating up the sensor will be connected with the sample gas Ensure that the maximum flow rate of sample gas does not exceed the measuring range of the flow meter This is particularly important for measurements coming from pressurized gas cylinders Exceeding the flow capacity can cause the destruction of the sensor...

Page 10: ...METROTEC 10 4 3 Drawing of Cable Routing ...

Page 11: ...can be switched on by pressing the power switch The display lights up briefly After ca 15 seconds system start information will show up depending on the setup and after the boot routine the standard screen of the measuring device will appear The status field will read e g Sensor temperature too low in the red box ...

Page 12: ... A stable measuring value will only be achieved ca 15 minutes after heating up has finished 5 2 Measurement 5 2 1 Sample Gas Connection After the starting routine the device is ready for us and can determine the oxygen content in gases For this purpose a connection between the measuring medium and the sample gas supply will be established ...

Page 13: ...ased on the calorimetric principle As the heat transfer differs from one gas to the next two different characteristic lines have been stored for air mixtures and argon mixtures The current selection will be displayed by N2 flow for air and nitrogen and by Ar flow for argon mixtures The flow is displayed at the bottom left of the touch screen In case the sample gas source s pressure is too low to s...

Page 14: ...evel 1 menu selection for which no CODE has to be entered will open After pressing the line 008 Pump speed the ENTER is activated If now the button ENTER is actuated a keypad will open for a value to be entered Touch field Parameter Last stored value Actual value Range Delete line Delete last input Return page Store value ...

Page 15: ...s can plug the gas lines in the sensor and damage the sensor 5 4 2 Hot Process Gases If hot process gases are to be examined the gases will be extracted from the process and transferred to the sensor after having been appropriately prepared The suction line may be made from metal or ceramics depending on the temperature As the amount of gas required for the measuring process is small there is in m...

Page 16: ...articles with a size over 5 m It would be an asset if this filter immediately closes and interrupts the flow of sample gas as soon as it steams up 5 5 Switching the Measuring Device off It is advisable to keep the device continuously in operation This will avoid the condensation of the steam in heated sensors which may cause corrosion Should it become necessary to switch off the device press the p...

Page 17: ...ygen value will be displayed in percent and changes its unit automatically into ppm parts per million when the measured value is below 0 1 Measured values of below 0 1 ppm will be displayed as 0 0 ppm Smaller measured values can be taken from the Log O2 section Example of a display with trend in the 0 30 ppm range 0 300 000 ppm ...

Page 18: ...wers of ten to be shown as a number consisting of only a few characters Conversion table bar ppm log x 10x 100 1 1000000 0 00 100 10 0 1 100000 1 00 10 1 1 0 01 10000 2 00 10 2 0 1 0 001 1000 3 00 10 3 0 01 0 0001 100 4 00 10 4 0 001 0 00001 10 5 00 10 5 0 0001 0 000001 1 6 00 10 6 0 00001 0 0000001 0 1 7 00 10 7 0 000001 0 00000001 0 01 8 00 10 8 The measuring device can display values up to 10 3...

Page 19: ...ical function If the hydrogen proportion changes or is not present the dew point cannot be calculated correctly Example of a display with trend in the 100 100 degree range 6 4 Lambda For some methods knowledge of the Lambda value of a combustion or a gas mixture is of importance Lambda is defined as Lambda supplied combustion air theoretically required combustion air The calculation requires enter...

Page 20: ... hydrogen the oxygen partial pressure can be used to calculate this value based on the hydrogen proportion For the calculation the hydrogen proportion from menu line 26 is used Note The calculation of O2Red is a mathematical function If the hydrogen proportion changes or is not present this value can not be calculated correctly Example of a display with trend in the 0 1000 ppm range ...

Page 21: ...METROTEC 21 7 Parameterisation The parameter level can be reached from the main screen LEVEL 0 will open for which no CODE is required Line 002 003 004 005 006 or 008 is selectable Touch area ...

Page 22: ...n be changed by the operator After pressing the Save button one of the following pages will appear depending on the desired LEVEL 1 or 2 or 3 The CODE for LEVEL 2 is 5678 The CODE for LEVEL 3 is secret and is only required for settings made by the manufacturer 7 1 Level 0 This level can be used by any operator without entering a CODE ...

Page 23: ...nstants Alarms Analog Outputs Logging Date and Time 7 3 Level 2 Access for this level is General settings Pump Graphs Gas constants Alarms Analog Outputs Logging Measured Value correction Additional Measured Value correction Password Code Date and Time 7 4 Level 3 For factory use only ...

Page 24: ...thout CODE No Menu Line Comment 002 Language Change to other language 003 Screen brightness Multiple level brightness setting 004 006 Enable Level 1 access Entry of required CODE 007 Pump Menu line Menu title actual value Access code Access without CODE No Menu Line Comment 008 Pump speed Pump speed setting ...

Page 25: ...elected Definition 1 000 ppm 0 1 10 000 ppm 1 100 000 ppm 10 1 000 000 ppm 100 13 15 Trend graphic for logarithm of oxygen partial pressure Settings are only active if this measured value was selected 16 18 Trend graphic for dew point Settings are only active if this measured value was selected 22 24 Trend graphic for O2 in H2 Settings are only active if this measured value was selected ...

Page 26: ...cess code Only required for mathematical functions Access with CODE 1234 No Menu Line Comment 026 Input value Measured e g by hydrogen analyser 027 Input value Calculated from hydro carbons 028 Alarms Menu line Menu title actual value Access code Access with CODE 1234 ...

Page 27: ...its entered for this block are valid 046 049 O2 in H2 alarm Alarm will only be triggered if it has been activated In this case the conditions and limits entered for this block are valid 050 052 Flow alarm Alarm will only be triggered if it has been activated In this case the conditions and limits entered for this block are valid Maximum alarm not applicable 053 055 Device temperature alarm Alarm w...

Page 28: ... O2 minimum in ppm This setting will be connected with menu no 62 63 if O2 was selected there Definition 1 000 ppm 0 1 10 000 ppm 1 100 000 ppm 10 1 000 000 ppm 100 065 O2 maximum in ppm This setting will be connected with menu no 62 63 if O2 was selected there Definition 1 000 ppm 0 1 10 000 ppm 1 100 000 ppm 10 1 000 000 ppm 100 066 LOG minimum in bar This setting will be connected with menu no ...

Page 29: ...ith menu no 62 63 if O2Red was selected there 073 O2 in H2 max in ppm This setting will be connected with menu no 62 63 if O2Red was selected there 074 Logging Menu line Menu title actual value Access code Access with CODE 1234 No Menu Line Comment 75 Logging interval in sec Recording a measured value in seconds 076 Measured value correction Menu line Menu title actual value Access code Detailed e...

Page 30: ... 100 O2 are adjusted this value must be corrected The correction does NOT affect the measured values below 21 O2 101 Damping of all measured values Damping of analog input signals 102 Sample gas selection Adjustment of flow display for gases with varying heat transfer 1 air nitrogen 2 argon argon mixtures 103 Password Menu line Menu title actual value Access code Access with CODE 5678 Can be chang...

Page 31: ...us They can only be called up after entering the password see Enabling Configuration On this page a new password can be programmed Warning If this password is lost it can only be read by the manufacturer 150 Date and Time Menu line Menu title actual value Access code Access with CODE 1234 No Menu Line Comment 151 Date Input only with required format 152 Time Input only with required format 8 Confi...

Page 32: ...METROTEC 32 8 1 Enabling Configuration 1 Select level 2 touch ENTER 1 Input CODE 2 Store ...

Page 33: ... the box in which the correction is to be made must be selected Now selection must be made between correction entry by keypad or by the higher lower buttons If the buttons are used you can either change the value by tapping the button successively and adding or subtracting the smallest possible increment or by pressing and holding the button After going beyond the next unit the intervals become la...

Page 34: ...ctivated See menu line No 30 34 38 42 46 50 53 56 Ø A definition is made for how long a pending alarm will be suppressed bevor being reported See menu line No 31 35 39 43 47 51 54 57 Ø In case an alarm evaluation had been activated the upper and lower alarm limit will be entered See menu line No 32 33 36 37 40 41 44 45 48 49 52 55 58 59 8 4 Setting the Trend Graphic Window Ø The time axis for each...

Page 35: ...alculation oft he Lambda value is made based on the measured oxygen partial pressure and knowing the gas used for combustion In addition a factor indicating the gas must be entered See menu line No 27 8 8 Pre Setting of Data Logging Ø Definition of the time interval after a single measured value is saved on an external storage medium See menu line No 75 9 Data Logging 9 1 Starting the Data Logging...

Page 36: ... 36 Note All values will stored locally on GSM touch File name is GSM_Touch_log txt For Data Logging a storage medium must first be connected to the designated USB socket Then the Logging button must be pressed ...

Page 37: ... time period record number and timer By pressing the EXIT button the view will return to the main screen The field Logging alternates in capital or small letters until the data logging is terminated 9 2 Closing the Data Logging The Logging button is pressed Then the following window will open If the Stop button is pressed now the data recording will stop By pressing the EXIT button the view will r...

Page 38: ...Data File The data set can be read out from the USB stick and further processed for example with Microsoft EXCEL Example of a data recording The individual parts of information are separated by semicolons as delimiters ...

Page 39: ...ial knowledge and may only be performed by trained personnel A cable connection between GSM touch an the network router is needed Now the Windows data explorer must be opened and NETWORK clicked blck Then input in the search field gsmtouch When found the GSMTOUCH and clicked the icon User gsmtouch Password gsmtouch ...

Page 40: ...h_log are now accessable 11 Interfaces 11 1 Analog Interfaces There are 2 analog 0 4 20 mA interfaces These can be used at the same time 11 2 Digital Interfaces Relay for minimum limit Relay for maximum limit Relay for collective alarm ...

Page 41: ...tive alarm 6 Collective alarm 2 Alarm min max 7 Alarm max 3 Alarm min 8 mA Output 1 plus 4 mA Output 1 minus 9 mA Output 2 plus 5 mA Output 2 minus Note Digital outputs are floating relay contacts 1A 24V mA Output 1 and 2 are electrically isolated from one another ...

Page 42: ...ty EN 50082 2 The device can be operated without restrictions in living and industrial environments Supply voltage 90 230 VAC Heating up time for sensors 10 to 15 minutes Reaction speed ca 2 seconds Heating up output ca 200 VA Control output ca 40 VA Temperature of measuring cell 700 o C Temperature measurement Thermal element Pt 10Rh Pt Sample gas temperature max 50 o C Amount of sample gas min 3...

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