Operating Instructions flowtherm NT
Contents
1. 5 3 Parameter settings Settings for vane wheel sensors FA 5 3 1 Menu gt Settings gt Sensor gt FA input gt Basic settings The connected vane wheel sensor determines the parameter type measuring range material and direc tional sensing to be set 5 3 1 1 Type Setting the vane wheel type The vane wheel type can be determined from the serial no on the sensor Selection mc vane wheel type micro for use in e g cylinder probes with OD 14 16 18 mm measuring tubes with ID 9 7 mm mn vane wheel type mini for use in e g cylinder probes with OD 25 mm measuring tubes with ID 18 2 mm md vane wheel type midi for use in e g cylinder probes with OD 30 mm md3 vane wheel type midi md3 for use in e g cylinder probes with OD 30 mm optimized for velocities up to max 3 m s special calibration characteristic specifically matched to the measuring task based on up to 30 supporting points Entering or changing the points see under 5 3 5 pairs of values 5 3 1 2 Measuring range Setting the vane wheel measuring range The measuring range can be determined from the serial no on the sensor Selection 20 measuring range up to 20 m s 40 measuring range up to 40 m s 80 measuring range up to 80 m s 120 measuring range up to 120 m s The measuring range must not be exceeded otherwise the vane wheel can be permanently damaged 5 3 1 3 Material Setting the vane wheel sensor material The material2. 01770Hz If the frequency measured value is greater than in the last pair of values then the velocity value is calculated However this means that the measurement uncertainty increases as this value is then outside the calibrated range 20 33 www hoentzsch com U408_flowthermNT_B_e_110809 Operating Instructions hontzsch flow measuring technology flowtherm NT Settings for thermal sensors TA 5 3 10 Menu gt Settings gt Sensor gt TA Input gt Basic settings The connected thermal sensor determines the parameter type 5 3 10 1 Type Setting the type of thermal sensor Refer to the relevant technical documents for selection options Selection KKZ the calibration number KKZ is individually determined for each sensor and modifies the basic characteristics KKZ enter as a 14 digit figure in which each digit has a 0 9 A F range hexadecimal 16 possible variables The actual KKZ can be found in the technical data sheet calibration certificate or directly on the sensor pairs of values special calibration characteristic specifically matched to the measuring task based on up to 30 supporting points Entering or changing the points see under 5 3 13 The actual pairs of values can be found in the technical documents 5 3 11 Menu gt Settings gt Sensor gt TA Input gt Measurement Settings The measuring task to be carried out determines the parameter section and profile factor to be set here
3. This value can be verified or also amended before saving With rectangular selected as measur ing surface the surface is converted to circular for the proposed value and this value is approximate Q PF 1 000 must always be set for VADi measuring tubes calibrated with pairs of values 5 3 8 Menu gt Settings gt Sensor gt VA Input gt Display The parameters damping and unit to be set here affect the measured value display when VA is selected as sensor see 5 3 19 Damping affects the analog output if VA is selected as the source see 5 3 16 5 3 8 1 Damping Damping s enter the damping time from 01 to 99 seconds Example 10 seconds after every second the arithmetical average from the last 10 seconds is displayed U408_flowthermNT_B_e_110809 www hoentzsch com 19 33 hentzsch Cokes TAE flow measuring technology 5 3 8 2 Unit n Selection of the unit for the measured value display and data logger Selection m s ft min m3 h l s l min cfm kg h N m3 h flow velocity in meter second flow velocity in feet minute flow rate in m3 hour calculated from flow velocity and entered measured section see 5 3 7 1 flow rate in litre second calculated from flow velocity and entered measured section see 5 3 7 1 flow rate in litre minute calculated from flow velocity and entered measured section see 5 3 7 1 flow rate in cubic feet minute calculated from flow velocity and entered
4. 5 3 21 2 in the 3 modes described above the displayed average is saved to the data logger with time stamp after each progess of an interval 26 33 www hoentzsch com U408_flowthermNT_B_e_110809 Operating Instructions hontzsch flow measuring technology flowtherm NT Re 1 by pressing f2 SM displayed instantaneous value is buffered as a single measurement and the number of the buffered values e g 00010 is displayed in the status field above right SM single measurement mode is set 2 by pressing f1 SM the average value of the buffered single measurements is calculated and shown on the frozen display and the number of single measurements used for averaging are displayed in the status field 3 by pressing f2 SM OK display of the average value is exited the instantaneous value is once again displayed and is ready for a new measurement Start a new measurement as described under 1 Is the data logger on see 5 3 21 2 then the average is saved to the data logger with time stamp by pressing SM Settings for the device 5 3 19 Menu gt Settings gt Device The parameter to be set here affects the flowtherm NT Selection Date setting the actual date Time setting the actual time When changing the batteries the date and time are buffered for several hours Supply battery 4 Alkali Mangan Mignon AA rechargeable 4 NiMh Mignon AA this setting exerts influence on the battery charging level
5. Prod 2011 Vane Wheel Sensors FA FAR FT FADI Vortex Flow Sensors VA VAT VADI Temperature Sensors Pt100 Sensors with Analog Output 4 20 mA or 0 10 V Output 2x 0 10V USB port connecting PC or external Power Supply Power 4 x Alkaline batterles mignon AA 1 5V or 4 x NIMH accumulators mignon AA 1 2V Operating Temperature 20 50 C Protection Type IP65 n Gottlieb Daimler Str 37 h ntzsch D 71334 Waiblingen flow measuring technology www hoentzsch com A UNBE NOU Description of type plate specifications 1 Description see Section 2 1 2 Device and serial no 3 Marking for Ex applications category 3G see Safety Instructions Section 1 see Instruction Manual Category3G Section 8 see Declaration of Conformity Section 9 4 Inputs see Description Section 2 1 see Connector sockets Section 4 1 see Wiring diagrams Section 4 2 and 4 3 5 Outputs see Electrical data Section 3 3 see Connector sockets Section 4 1 see Wiring diagrams Section 4 3 6 USB connection see Electrical data Section 3 3 see Connector sockets Section 4 1 7 Power supply see Safety Instructions Section 1 see Electrical data Section 3 3 8 Operating Conditions see Safety Instructions Section 1 see Operating conditions Section 3 1 6 33 www hoentzsch com U408_flowthermNT_B_e_110809 Operating Instructions hontzsch flow measuring technology flowtherm NT Re 3 Technical Specifications Q 3 1 Ope
6. above other sensors such as Pt100 if ordered accessories for sensors e g extension rod for FA sensor if ordered CD ROM with PC software HLOG II and USB cable optional adapter plug and USB cable optional various connection and extension cables connectors optional carrying case optional Please check that everything listed in the Delivery Note Technical Data Sheet is included in the delivery 2 1 Description type plate The flowtherm NT is a multifunctional hand held unit with data logger for measuring flow velocity volume flow flow rate standard flow rate mass flow temperature pressure and other variables insofar as they are measurable deducible with the connectable sensors vane wheel sensors FA FAR FT FADi FARDi vortex sensors VA VAT VADi thermal sensors TA10 TADi temperature sensors Pt100 2 wire 4 20 mA sensors with 12 V supply 3 or 4 wire 4 20 mA sensors with output and 12 V supply 3 or 4 wire sensors with 0 10 V output and 12 V supply U408_flowthermNT_B_e_110809 www hoentzsch com 5 33 n hentzsch Cokes Tae flow measuring technology The following type plate is found on the back of the unit Hand held unit for measuring flow velocity flow rate temperature pressure and more flowtherm NT S No NT 0130 C 113 G Ex nA IIC T4 X using Thermal Sensors TA 113G ExnAIIC T6 X using Sensors VA FA PH100 Input for Thermal Sensors TA10 TADi
7. display Light display light On or Off after switching on the device Language selection of the dialogue language German or English Sensor selection of the flow sensor FA vane wheel sensor FA VA vortex sensor VA TA thermal sensor TA Only ever connect the selected sensor Factory settings 5 3 20 Menu gt Settings gt Factory settings The flowtherm NT is reset to factory settings all settings are lost if they have not been previously saved to a profile of its own see 5 3 23 The factory settings are preset as those found in the shipping documents The values of customer or application specific measuring tasks are defined in the documents Before resetting to factory settings the following confirmation prompt appears Factory setting Confirm with Cancel with lt or 41 MESS Q Before resetting to factory settings save the actual settings to a profile see 5 3 23 otherwise they will be lost Cancelling the factory settings does not affect the saved profile U408_flowthermNT_B_e_110809 www hoentzsch com 27 33 hentzsch Cokes TAE flow measuring technology n Data logger 5 3 21 Menu gt Data logger or LOGGER The data logger is for saving measured values generated in various measuring modes of long term or sin gle measurement see 5 3 18 1 The contents of the data logger can be viewed on the device or down loaded saved and subsequently processed via the USB port on a Windows PC with h
8. display of the actual time FA VA TA input display of the flow sensor depending on selection see 5 3 19 Pt100 input display of the temperature sensor Pt100 20mA input display of the analog input 4 20 mA 10V input display of the analog input 0 10 V TAT input display of the temperature measurement of the thermal sensor TA only relevant if a TA sensor is selected under 5 3 19 5 3 17 3 Row 2 Selection of which measured value is allocated to input channel 2 and displayed as Row 2 Selection see 5 3 17 2 5 3 17 4 Row3 Selection of which measured value is allocated to input channel 3 and displayed as Row 3 Selection see 5 3 17 2 Settings for long term measurement 5 3 18 Menu gt Settings gt Long term measurement Settings for long term measurement 5 3 18 1 Mode Setting the measuring mode for long term measurement Selection Start Stop Start Stop mode for long term measurement Start Start mode long term measurement also enter interval s length of measurement in seconds Auto Automatic mode for long term measurement also enter interval s length of measurement in seconds repitition amount of repititions Single measure single mode with averaging via the single saved values U408_flowthermNT_B_e_110809 www hoentzsch com 25 33 hentzsch Cokes TAE flow measuring technology n Description of the long term measurement with selection of the various measuring modes LM Start Stop mode i
9. flow in kg hour calculated from flow velocity and entered easured section see 5 3 11 1 and entered standard density standard conditions 21 C and 1014 hPa 22 33 www hoentzsch com U408_flowthermNT_B_e_110809 hontzsch flow measuring technology Operating Instructions flowtherm NT NE gt ES 5 3 13 Menu gt Settings gt Sensor gt TA Input gt Pairs of values If pairs of values is selected see 5 3 10 1 then the here alterable pairs of values for determining the measured value is applied as a calibration curve Selection Configuration enter the quantity of pairs of values maximal 30 for processing and display Pairs of values display and change of the pairs of values A pair of values always consists of a velocity value in m s and a frequency value in Hz The condition being the pairs of values must be ever increasing i e the next velocity or frequency value must always be greater than the previous one Example for quantity 03 01 000 50m s 06000Hz 02 010 00m s 08350Hz 03 040 00m s 12770Hz If the frequency measured value is greater than in the last pair of values the the velocity value is calculated However this means that the measurement uncertainty increases as this value is then outside the calibrated range Note For switching between different calibration gases with a thermal sensor each pair of values calibration for the respective calibration gas can be saved in its own dev
10. for the thermal sensor 5 3 11 1 Section Setting the measuring section for measuring in pipelines for flow rate display Selection Circular for pipes with circular section di mm enter the ID in mm Rectangular for pipes with rectangular section a mm enter the inner surface a in mm b mm enter the inner surface b in mm 5 3 11 2 Profile factor The profile factor PF specifies the ratio of mean flow velocity in the measuring section and the flow velocity measured from the sensor Requirements are centric sensor positioning non rotational inlet flow and adequate dimensioned input output sections See also Documents U232 and U234 Following profile factors are to be set for thermal flow sensors TA10 subject to the pipe diameter Pipe ID PF for thermal in mm sensors TA10 25 0 725 27 2 0 740 35 9 0 790 40 0 810 41 8 0 820 50 0 840 0 840 For measuring in larger free jet as well as larger ducts or measuring tubes with setting PF 1 000 the local punctual velocity will be displayed U408_flowthermNT_B_e_110809 www hoentzsch com 21 33 hentzsch Cokes TAE flow measuring technology with f3 TABLE a profile factor subject to the set diameter of the measuring surface 5 3 11 1 is rec ommended This value can be verified or also amended before saving With rectangular selected as meas uring surface the surface is converted to circular for the proposed value and this value is approximate PF 1 000 must always be
11. measured section see 5 3 7 1 mass flow in kg hour calculated from flow velocity and entered measured section see 5 3 7 1 the measured or entered working temperature and working pressure and the entered standard density standard conditions 0 C and 1013 hPa With the selection measure for temperature and pressure the respective input channel must be selected and set see 5 3 15 standard flow rate in standard m3 hour calculated from flow velocity and entered measured section 5 3 7 1 measured or entered working temperature and pressure standard conditions 0 C and 1013 hPa With the selection measure for temperature and pressure the respective input channel must be selected and set see 5 3 15 5 3 9 Menu gt Settings gt Sensor gt VA Input gt Pairs of values If pairs of values is selected see 5 3 6 1 then the here alterable pairs of values for determining the measured value is applied as a calibration curve Selection Configuration Pairs of values enter the quantity of pairs of values maximal 30 for processing and display display and change of pairs of values A pair of values always consists of a velocity value in m s and a frequency value in Hz The condition being the pairs of values must be ever increasing i e the next velocity or frequency value must always be greater than the previous one Example for quantity 03 01 000 50m s 00010Hz 02 010 00m s 00350Hz 03 040 00m s
12. set for TADi measuring tubes calibrated with pairs of values 5 3 12 Menu gt Settings gt Sensor gt TA Input gt Display The parameters damping and unit to be set here affect the measured value display when TA is selected as sensor see 5 3 19 Damping affects the analog output if TA is selected as the source see 5 3 16 5 3 12 1 Damping Damping s enter the damping time of 01 to 99 seconds Example 10 seconds after every second the arithmetical average of the last 10 seconds is displayed 5 3 12 2 Unit Selection of the unit for the measured value display and data logger Selection N m s standard flow velocity in meter second standard conditions 21 C and 1014 hPa N ft min standard flow velocity in feet minute standard conditions 21 C and 1014 hPa N m3 h standard flow rate in m3 hour calculated from flow velocity and entered measured section see 5 3 11 1 standard conditions 21 C and 1014 hPa N I s standard flow rate in litre second calculated from flow velocity and entered measured section see 5 11 1 standard conditions 21 C and 1014 hPa N I min standard flow rate in litre minute calculated from flow velocity and entered measured section see 5 3 11 1 standard conditions 21 C and 1014 hPa N cfm standard flow rate in cubic feet minute calculated from flow velocity and entered measured section see 5 3 11 1 standard conditions 21 C and 1014 hPa kg h mass
13. the USB port to a Windows PC with the help of the optional HLOG II software otherwise they will be lost 28 33 www hoentzsch com U408_flowthermNT_B_e_110809 Operating Instructions hontzsch flow measuring technology flowtherm NT Re Device status 5 3 22 Menu gt Status Display of status Software software versions S No serial no Memory display of the free space for the data logger in Battery display of the battery capacity in 0 is displayed when supply is via the USB connection When the battery symbol appears for the first time on the top right in the measured value display there is still approx 10 battery capacity available When using rechargeable batteries rechargeable must be selected in the settings 5 3 19 other wise the battery capacatity display will be incorrect Device profiles 5 3 23 Menu gt Profiles In the profiles the complete parameter inputs of the device can be saved under a freely definable name with up to 8 characters and subsequently reloaded For example all parameter entries for a specific sensor can be saved to a profile or also to an appointed measuring point Up to 100 different profiles can be saved Available profile storage locations are marked with a behind the profile name Profiles cannot be deleted but may be overwritten Q Returning to the factory settings 5 3 20 has no impact on the saved profiles Selection Load loading a save
14. 10809 www hoentzsch com 15 33 hentzsch Cokes ae aa flow measuring technology 5 3 3 Menu gt Settings gt Sensor gt FA Input gt Density correction Liquids Liquids are virtually density resistant No density correction needed Gases and vapours The density of gases and vapours can be strongly modified against pressure and temperature Such a severe modification leads to a minor impact on the measured value of a vane wheel sensor This impact manifests itself in a determinable correction value which is added to or subtracted from the measured value The percentaged impact of this correction value is however negligible with average to high velocity flow With low and very low values consideration of the density correction becomes more expediant To determine this correction value the measuring range initial value starting value of a vane wheel is examined The specified starting value in the vane wheel sensor documents arises from a medium density of 1 204 kg m calibration conditions The only slightly deviating actual starting value even with considerably different working density of the medium in the actual application ensues in good approximation of the following actual starting value specified starting value x root of density during calibration working density of the medium The correction value is now the difference between the real and the specified starting value The characteristic of the sensor is displa
15. 2 010 00m s 00350Hz 03 040 00m s 01770Hz Q If the frequency measured value is greater than in the last pair of values then the velocity value is calculated However this means that the measurement uncertainty increases as this value is then outside the calibrated range With vane wheel sensors the measuring range found in the serial no and technical data sheet must not be exceeded as this may cause permanent damage to the vane wheel For further information refer to 5 3 1 2 Page 13 of these Operating Instructions Settings for vortex sensors VA 5 3 6 Menu gt Settings gt Sensor gt VA Input gt Basic settings The connected vortex sensor determines the parameter type 5 3 6 1 Type Setting the type of vortex sensor Refer to the relevant technical documents for selection options Selection KKZ the calibration number KKZ is individually determined for each sensor and modifies the basic characteristics KKZ enter as an 8 digit figure in which each digit has a 0 9 A F range hexadecimal 16 possible variables The actual KKZ can be found in the technical data sheet calibration certificate or directly on the sensor pairs of values special calibration characteristic specifically matched to the measuring task based on up to 30 supporting points Entering or changing the points see under 5 3 9 The actual pairs of values are documented in the technical documents 5 3 7 Menu gt Settings gt Sensor gt VA In
16. air 287 hydrogen H2 4124 steam H20 462 methane CH 518 argon Ar 208 nitrogen N2 297 carbon dioxide CO 189 oxygen O 260 carbon monoxide CO 297 propane C3Hg 189 helium He 2077 sulphur dioxide SO2 130 16 33 www hoentzsch com U408_flowthermNT_B_e_110809 hontzsch flow measuring technology Operating Instructions flowtherm NT NE DO ES 5 3 4 Menu gt Settings gt Sensor gt FA input gt Display The parameters damping and unit to be set here affect the measured value display when FA is selected as sensor see 5 3 19 Damping affects the analog output if FA is selected as the source see 5 3 16 5 3 4 1 Damping Damping s enter the damping time of 01 to 99 seconds Example 10 seconds after every second the arithmetical average of the last 10 seconds is displayed 5 3 4 2 Unit Selection of the unit for measured value display and data logger Selection m s flow velocity in meter second ft min flow velocity in feet minute m3 h flow rate in m3 hour calculated from flow velocity and entered measured section see 5 3 2 2 l s flow rate in litre second calculated from flow velocity and entered measured section see 5 3 2 2 l min flow rate in litre minute calculated from flow velocity and entered measured section see 5 3 2 2 cfm flow rate in cubic feet minute calculated from flow velocity and entered measured section see 5 3 2 2 kg h mass flow in kg hour calculated from flow velocit
17. alling the measuring equipment 8 6 Maintenance Maintenance and repairs are to be carried out solely by H ntzsch GmbH 32 33 www hoentzsch com U408_flowthermNT_B_e_110809 Operating Instructions flowtherm NT RR hontzsch flow measuring technology 9 Declaration of Conformity for hand held unit flowtherm NT category 3G We H ntzsch GmbH Gottlieb Daimler Str 37 D 71334 Waiblingen declare under sole responsibility that the product hand held unit flowtherm NT to which this declaration relates is in conformity with the provisions of the following stardards or normative documents Provisions of the Directive Reference no and date of issue 94 9 EG Equipment and Protective Systems in Potentially Explosive Atmospheres EN 60079 0 2007 EN 60079 15 2006 2004 108 EG Electromagnetic Compatibility EN 61000 6 4 2007 EN 61000 6 2 2005 97 23 EG Pressure Equipment 29 05 1997 Waiblingen 27 10 2010 H ntzsch GmbH Gottlieb Daimler StraBe 37 D 71334 Waiblingen Hegnach Tel 49 7151 17 16 0 Fax 49 7151 5 8402 E Mail info hoentzsch com Internet www hoentzsch com U408_flowthermNT_B_e_110809 Subject to alteration e Thomas Itte legally binding signature Effective from November 2010 www hoentzsch com 33 33
18. alue 0 02 of full scale All values are valid for adjusted damping of 30 seconds while measurement The measuring uncertainties of the used sensors have to be considered additionally A 4 Initial Operation Startup For installation and operation of the system especially in category 3G the national regulations currently in force the recognised standards of good practice and these Operating Instructions are decisive 4 1 Connector sockets 5 pin connector socket for thermal sensors TA10 and TADi measuring tubes 8 pin connector socket for vane wheel sensors FA FAR FT and FADi measuring tubes for vortex sensors VA VAT and VADi measuring tubes for temperature sensors Pt100 Q Always connect just one sensor at a time 8 33 www hoentzsch com U408_flowthermNT_B_e_110809 hontzsch flow measuring technology Operating Instructions flowtherm NT NE DO ES 12 pin connector socket for analog outputs 2 x 0 10 V for analog input 4 20 mA for analog input 0 10 V USB connector socket type B data logger readout hardware configuration for external power supply via PC or adapter plug Always make sure that the connector sockets not in use are firmly capped the sensor plug is screwed on tightly and the USB connection cover is tightly sealed otherwise the IP65 protection cannot be guaranteed Q 4 2 Wiring diagram for the 8 pin connector plug Electrical connection must be carried out according to the rel
19. b in mm 5 3 2 3 Profile factor The profile factor PF specifies the ratio of mean flow velocity in the measuring section and the flow velocity measured from the sensor Requirements are centric sensor positioning non rotational inlet flow and adequate dimensioned input output sections See also Documents U117 and U205 Following profile factors are to be set for vane wheel cylinder probes ZS according to pipe diameter Pipe ID PF for ZS16 mc PF for ZS18 mc PF for ZS25 mn and ZS30 inmm md and md3 40 0 914 0 898 50 0 933 0 916 0 735 60 0 950 0 932 0 760 70 0 964 0 948 0 784 80 0 976 0 962 0 807 90 0 987 0 975 0 829 100 0 994 0 986 0 849 120 1 004 1 004 0 882 170 1 008 1 021 0 935 180 1 008 1 021 0 945 220 1 008 1 021 0 955 1 008 1 021 0 955 For measuring in larger free jet as well as larger ducts or measuring tubes with setting PF 1 000 the local punctual velocity will be displayed With f3 TABLE a profile factor subject to the set vane wheel type 5 3 1 1 and diameter of the measur ing surface 5 3 2 2 is recommended This value can be verified or also amended before saving With rec tangular selected as measuring surface the surface is converted to circular for the proposed value and this value is approximate If the sensor is a ZS18 mc the value must be corrected according to the table above Q PF 1 000 must always be set for FADi measuring tubes calibrated with pairs of values U408_flowthermNT_B_e_1
20. can be determined from the serial no on the sensor Selection steel E aluminium A titanium T 5 3 1 4 Directional sensing Setting for the directional sensing function Such sensors can be identified by an R in the serial number directional sensing yes measured value display with prefix directional sensing no measured value display without prefix Selection Y N 14 33 www hoentzsch com U408_flowthermNT_B_e_110809 hontzsch flow measuring technology Operating Instructions flowtherm NT NE gt ES 5 3 2 Menu gt Settings gt Sensor gt FA Input gt Measurement settings The measuring task to be carried out determines the parameter medium section and profile factor to be set here for the vane wheel sensor 5 3 2 1 Medium Setting the medium Should pairs of values or md3 be selected in the basic settings 5 3 1 1 this setting has no impact on the measurement Gases the characteristic for air gases is applied Selection G F Liquids Fluids the characteristic for water liquids is applied Only vane wheel sensors GF may be used in liquids otherwise the sensor can be permanently damaged 5 3 2 2 Section Setting the measuring section for measuring in pipelines for flow rate display Selection Circular for pipes with circular section di mm enter the ID in mm Rectangular for pipes with rectangular section a mm enter the inner surface a in mm b mm enter of the inner surface
21. ced by this value If the operating density of the medium is greater than the calibration density of 1 204 kg m then the determined correction value must be deducted from the measured value If it is less than the calibration density of 1 204 kg m8 then the determined correction value must be added to the measured value The working medium density is needed to calculate the correction value Example A ZS25GE mn40 100 p10 sensor with a specified starting value of 0 5 m s is used in air at 1 013 bar and 100 i e with a working medium density of 0 946 kg m8 Entered in formula actual starting value 0 5 m s x root of 1 204 kg m 0 946 kg m 0 5 m s x 1 128 0 564 m s correction value 0 564 m s 0 5 m s 0 064 m s With a displayed value of 15 00 m s without correction and with density correction on the correction value of 0 064 m s would be allowed for and a corrected value of 15 06 m s would be displayed Setting Selection N density correction no Y density correction yes then enter the density of the sample gas W density kg m3 enter the working medium density in kg m3 If the working medium density is not known it can be determined with the formula W density P R T where P absolute pressure in Pa R specified gas constant in J kg K T temperature in K Here the specified gas constants of some gases sample gas spec gas constant sample gas spec gas constant in J kg K in J kg K dry
22. ckets and screw down tightly Mains supply via USB connection with PC or adapter plug Supply current via USB connection not less than 300 mA B The mains supply is not electrically isolated from the outputs The connection of the analog outputs and the earth of the USB connection have the same potential i e for EMC reasons a peripheral device should have potential free inputs for evaluation of the analog outputs when connecting to a PC Analog outputs 2 x 0 10 V with internal resistance of 1000 Ohm Measured initial and final values adjustable at any one time U408_flowthermNT_B_e_110809 www hoentzsch com 7 33 hentzsch Cokes ae aa flow measuring technology n Analog input 4 20 mA for connection of sensors in 2 wire system with lt 12 V supply allocation of unit initial value and final value adjustable Analog input 0 10 V for connection of sensors with voltage output input resistance 5 MOhm lt 12 V power supply for sensors max 100 mA allocation of unit initial value and final value adjustable 3 4 Measuring Uncertainty Input FA 1 Hz Input VA 1 Hz Input TA 1 0 7 of meas value 0 02 of full scale Temperature display 1 Kelvin Analog input 0 10 V 1 0 3 of meas value 0 02 of full scale Analog input 4 20 mA 1 0 3 of meas value 0 02 of full scale Input Pt100 0 2 Kelvin Analog output 1 2 0 10 V 1 0 2 of meas v
23. d profile by selecting from the list Save saving the active parameter settings to a profile by selecting from the list in an available profile storage field and entry of a new name or in an already occupied profile storage location by overwriting and changing or retaining the name Keys 5 3 24 LM Start f2 Funktion key for operating the long term measurement see 5 3 18 5 3 25 Switch off OFF reset Funktion key for switching off the device active in all menus If the device no longer reacts to keypad entry press this key for more than 10 seconds to switch off the device and reset U408_flowthermNT_B_e_110809 www hoentzsch com 29 33 hontzsch Cokes TAE flow measuring technology n 6 Troubleshooting Fault Cause Troubleshooting Device cannot be Dead batteries Insert new re charged batteries switched on Faulty electronics Return to H ntzsch No measured value Sensor contaminated Clean according to instructions display or analog output OV Profile factor set at 0 000 Set profile factor to the corresponding value of no value nominal diameter and sensor type Unit setting 5 3 19 does Adjust the setting 5 3 19 to the connected not correspond to the con sensor or connect compatible sensor nected flow sensor Analog output OV Output setting does not Amend output setting port or source 5 3 16 no value match the port or source 5 3 16 Measured value too Sensor type o
24. elp of the optional HLOG II software The measured values defined under 5 3 17 for rows 1 3 are saved to the data logger Date and time are not logged separately if these have been selected for measurement display Note In this way the possible number of data records to be logged can be increased as the length of the data record is thus reduced This has no impact on the time stamp for the logged values 5 3 21 1 View The contents of the data logger are shown on the display With Y to the next data set With lt back to menu With or 1 MESS back to measured value display 5 3 21 2 Settings Settings for the data logger Selection Data logger On or Off Switch data logger on or off With data logger on the data for long term measurement see 5 3 18 is saved to the data logger The data logger can also be switched on from the measured value display with LOGGER via Selection Settings gt Data logger or with LOGGER OFF switched off Designation freely adjustablee measuring point designation with max 8 digits for all subsequently saved data logger values until entering a new measuring point designation 5 3 21 3 Delete Delete the contents of the data logger Before deleting a prompt appears Delete data logger Confirm with Cancel with lt or f1 MESS All the values saved to the data logger are deleted accordingly Q Before deleting the data logger contents these should be downloaded and saved via
25. es for a detailed description of the respective functions U408_flowthermNT_B_e_110809 www hoentzsch com 11 33 hontzsch Cokes flow measuring technology Examples for key functions in the menus Menu selection list With 4 Y up or down in the list the selected element is highlighted With lt a menu level higher backwards With gt a menu level lower forwards select With select a menu level lower forwards With 1 return to measured value display With switch off Parameter value selection window With 4 Y new selection element the selected element flashes here mn With select and save and return to selection list With 1 return to measured value display without saving With f2 return to selection list without saving With switch off Parameter value digit numeric text setting With 4 Y change digit the selected and editable digit flashes here 1 With lt gt 1 digit to the left or right respectively With select and save and return to selection list With 1 return to measured value display without saving With f2 return to selection list without saving With switch off 12 33 www hoentzsch com Operating Instructions flowtherm NT MEAS OFF So eo O MEAS ie OFF MEAS Pan TABLE DEF So eo BB U408_flowthermNT_B_e_110809 Operating Instructions flowtherm NT 5 2 Se
26. evant wiring diagram Incorrect connection can cause serious damage to the electronics Wiring diagram with view of solder contacts Pin assignment pin 1 v FA FAR signal 1 UL or v VA signal UL pin 2 ground L pin 3 PT100 3 4 5 6 pin 4 PT100 pin 5 PT100 pin 6 PT100 pin 7 v FAR signal 2 JUL pin 8 V housing shield Pt100 U408_flowthermNT_B_e_110809 www hoentzsch com 9 33 hentzsch Cokes TAE flow measuring technology Q 4 3 Wiring diagrams for the 12 pin connector plug Electrical connection must be carried out according to the relevant wiring diagram Incorrect connection can cause serious damage to the electronics Wiring diagrams with view of solder contacts 4 3 1 Analog outputs 0 10 V C analog output port 1 D analog output port 2 E earth 0 V plug shell shielding 4 3 2 Analog input 4 20 mA 2 wire system current for 12V supply wer supply 12V A o F ower supply U o plug shell shielding 4 3 3 Analog input 4 20 mA 3 or 4 wire system current for 12V supply A power supply 12V B power supply OV F signal H signal OV plug shell shielding 4 3 4 Analog input 0 10 V 3 or 4 wire system voltage for 12V supply A power supply 12V B power supply OV G signal H signal OV plug shell shielding 10 33 www hoentzsch com U408_flowthermNT_B_e_110809 Operating Instructions hontzsch flow measuring techn
27. hontzsch flow measuring technology Operating Instructions flowtherm NT NE AN zertifiziert nach N ISO 9001 2008 certified quality Operating Instructions flowtherm NT Software status from 1 03 Multifunctional hand held unit with data logger for measuring flow rate flow velocity temperature pressure and other variables U408_flowthermNT_B_e_110809 www hoentzsch com 1 33 hentzsch Cokes TAE flow measuring technology Overview and brief introduction of controls and connections Thermal sensors TA TADi Always connect just one sensor at a time Vane wheel sensors FA R FT FA R Di or vortex sensors VA VAT VADi or temperature sensors Pt100 2 analog outputs 0 10 V analog input 4 20 mA analog input 0 10 V Connector socket cap Close any connections not in use Holding magnet for fixing the unit to metal surfaces Measured value display flowtherm NT Input channel 1 name unit value PTAD0 EINGANG C Input channel 2 name unit 0020 0 value FA EIMGANGN u3 h SENSOR Input channel Hii 20 Input channel 3 name unit and status info value ZOHA ELNGAMG CHa th LH 2TART L GGER HENU Function keys Designation FF f4 Switch off Function keys and reset 1 f2 f3 with variable functions depending on operation menu USB connection type B gt ots for connecting to PC or adapter pl
28. ice profile see 5 3 23 Q Resetting the factory settings see 5 3 20 has no impact on the saved profile Changing the pairs of values for the various calibration gases can only be reconstructed via the documentation in the Techni cal Data Sheet and calibration certificate U408_flowthermNT_B_e_110809 www hoentzsch com 23 33 hentzsch Cokes TAE flow measuring technology n Settings for the Pt100 input for temperature measurement 5 3 14 Menu gt Settings gt Sensor gt PT100 Input gt Unit The parameter unit to be set here affects the measured value display Selection C display of temperature in C oF display of temperature in F Settings for the analog inputs 5 3 15 Menu gt Settings gt Sensor gt Analog input Input Selection 4 20mA current input 4 20 mA is selected 0 10V voltage input 0 10 V is selected Designation for each of the two inputs a designation of up to 13 digits for the sensor can be entered Example pressure sensor Equivalent for each of the two inputs a display equivalent can be defined For this purpose the desired initial value at 4 mA or 0 V and the desired final value at 20 mA or 10 V is entered respectively Example 4 20 mA gt 900 1600 hPA Unit for each of the two inputs a unit of up to 5 digits for measured value display can be entered Example hPa unused digits are marked with a and are not shown in the display and data logger Setting
29. ing technology A 1 Safety Instructions n Risk of death and injury and cause of damages Read the Operating Instructions carefully before initial operation Observe general safety precautions and also those included in other sections of these Operating Instructions Hazard risks non observance of the Operating and Safety Instructions modifications to the device by the customer handling the device outside the specified operating conditions handling the sensors outside the specified operating conditions use of unsuitable power supplies and peripheral devices improper use of the device Prevention of voltage hazards use only the dedicated adapter plug for the mains supply make sure that the PC is correctly connected to the mains earthed safety socket earthing when using a USB connection when connecting analog outputs or inputs to peripheral devices make sure that these are correctly connected to the mains earthed safety socket earthing Danger when installing the sensors in pressurized pipelines sensors for use in pressurized pipelines are to be inserted or retracted in depressurized conditions only non oberservance may result in serious injuries to personnel when installing or removing under pressure the appropriate protective equipment must be used e g ball valve and probe guide pieces with chain guard or spindle probe guide pieces Danger when using the device in explosive atmosphere
30. ld unit flowtherm NT for connection of vane wheel flow sensors FA as probe and measuring tube vortex flow sensors VA40 or VADi thermal flow sensors TA10 or TADi as well as temperature probes Pt100 Use in compliance with regulations The flowtherm NT with above mentioned Ex version category 3G sensors is used for measuring the flow velocity the volume flow and the temperature of gases and also of liquids with specified vane wheel flow sensors FA and Pt100 It is designed for application in areas in which category 3G equipment is required During normal operation within the limits of the technical specifications the equipment does not generate sparks and there is no intrinsic heating The flowtherm NT with respective sensors may not be used e in areas in which category 1G or 2G equipment is required e in areas in which category 1D 2D or 3D equipment is required A 8 2 Safety Instructions Read the Instruction Manual carefully before initial operation Failure to do so may cause an explosion The flowtherm NT with Ex version sensors for category 3G and 3D is to be used only in areas in which the ambient temperature range of the housing does not exceed 0 C to 50 C See also details on the type plate of the flowtherm NT or sensor as well as the relevant technical documents The maximum permissible temperature of the medium in categorie 3G areas corresponds to the temperature class See also details on the type plate as well as the relevant
31. ology flowtherm NT Re 5 Operation 5 1 Key functions Switch on with the key also O symbol hold the key down until text appears in the display Switch off with the key also symbol press the key briefly and wait until the display goes off amp Reset Should the unit no longer react to key operation switch off can be enforced by pressing the off key for more than 10 seconds Control keys 1 f2 and are control keys with variable functions which are identified in the lowermost row of the display depending on operation menu Arrow keys in the measured value display view after switch on during measured value display the arrow keys have the following function lt and gt shift the display Definition whether the values from 1 2 or 3 input channels are displayed simultaneously Depending on selection the character size of the display values changes 4 and Y is the display so set that only measured values from 1 or 2 input channels are displayed simultaneously then scrolling with these keys through the input channels can be carried out In the menus and input boxes 4 62 4 and gt are control keys for navigating within the various menus and menu levels ok key In the measured value display view after switch on is a control key for switching the display light on or off In the menus and input boxes is a control key to select and save Refer to the following exampl
32. put gt Measurement settings The measuring task to be carried out determines the parameter section and profile factor to be set here for the vortex sensor 5 3 7 1 Section Setting the measuring section for measuring in pipelines for flow rate display Selection Circular for pipes with circular section di mm enter the ID in mm Rectangular for pipes with rectangular section a mm enter the inner surface a in mm b mm enter the inner surface b in mm 18 33 www hoentzsch com U408_flowthermNT_B_e_110809 Operating Instructions hontzsch flow measuring technology flowtherm NT Re The profile factor PF specifies the ratio of mean flow velocity in the measuring section and the flow velocity measured from the sensor Requirements are centric sensor positioning non rotational inlet flow and adequate dimensioned input output sections See also Documents U155 and U206 Following profile factors are to be set for vortex sensors VA40 subject to the pipe diameter Pipe ID PF for VA40 Pipe ID PF for VA40 in mm in mm 80 0 719 160 0 808 90 0 729 170 0 819 100 0 738 180 0 830 110 0 750 190 0 839 120 0 761 200 0 842 130 0 773 300 0 845 140 0 784 400 0 850 150 0 796 e 0 850 For measuring in larger free jet as well as larger ducts or measuring tubes with setting PF 1 000 the local punctual velocity will be displayed With TABLE a profile factor subject to the set diameter of the measuring surface 5 3 7 1 is recom mended
33. r KKZ set incor Compare and correct settings according to low rectly details in the Technical Data Sheet Sensor contaminated Clean according to instructions Profile factor set too low Set profile factor to the corresponding value of nominal diameter and sensor type Input output section too Change sensor position improve flow short conditions with a flow rectifier Rotational flow Reposition sensor in flow direction use flow rectifier Vortex VA sensors Return sensor to H ntzsch for checking reduced acoustic coupling in the sensor elements as a result of vibration or impact Measured value too Sensor type or KKZ set Compare and correct settings according to high incorrectly details in the Technical Data Sheet Incorrect scaling of analog Check settings and amend if necessary output Profile factor set too high Set profile factor to the corresponding value of nominal diameter and sensor type EMC problem See reference to electromagnetic compatibility EMC in the sensor documents 7 Replacement Parts upper housing with keypad lower housing battery compartment cover seal for upper housing connector socket cap USB connection cover 12 pin connector plug 30 33 www hoentzsch com U408_flowthermNT_B_e_110809 hontzsch flow measuring technology Operating Instructions flowtherm NT NE DO ES 8 Instruction Manual Category 3G flowtherm NT 8 1 Equipment Hand he
34. rating conditions Ambient temperature of the housing when in service 20 50 C Type of protection IP65 3 2 Housing and connection Type of protection IP65 with battery compartment cover and sensor plug screwed on tightly connector sockets not in use firmly capped and USB connection cover tightly sealed Material electrically conductive ABS plastic External measurements weight W H L 96 42 197 mm approx 520 g Connections 5 pin connector plug for thermal sensors 8 pin connector plug for vane wheel vortex or temperature sensors 12 pin connector plug for analog outputs or inputs USB for data logger readout configuration of the device and external power supply via PC or mains adapter 3 3 Electrical data Power supply via 4 alkaline manganese Mignon AA 1 5V batteries running time Duracell Plus approx 24 hours using flow sensor FA without display light or via 4 NiMH rechargeable Mignon AA 1 2V batteries running time Ansmann Digital 2850 mAh approx 26 hours using flow sensor FA without display light Q Open the battery compartment on the back of the device with a screw driver Always change all 4 batteries at the same time checking for correct polarity Only ever recharge batteries away from the unit using a suitable charger Always ensure that all 4 rechargeable batteries are fully recharged before insert ing To close the compartment press it firmly in the seal in the direction of the connector so
35. rement as described under 1 LM Automatic mode is set 1 press f2 LM START to start the long term measurement In the 1 interval the instantaneous value is displayed and the measurement period in seconds e g S00010 is continuously displayed in the status field above right The number of repetitions ROO001 is displayed under it The bar above the control key description shows the progress of the measurement period in relation to the set interval Ater the 1 interval has elapsed the display is frozen and the next interval starts automatically Displayed is the average of the previous interval during the set length The measurement period in seconds is continuously displayed in the status field and below it the number of repititions R00002 2 press f2 LM AUTO before the set number of repetitions of long term measurement are reached then long term measurement is cancelled and waits for a new entry as under 1 If LM AUTO is not activated the measurement period runs to the end of the set number of the intervals then long term measurement is stopped the display is frozen and the last average value is displayed above the measurement period in seconds and below it the number of expired repetitions of the of the interval 3 press f2 LM OK to exit display of the average value the instantaneous value is once again displayed and is ready for a new measurement Start a new measurement as described under 1 Q With data logger on see
36. s the unit and its sensors may only be used in areas specified for category 3G zone 2 gas equipment when sensors with category 1 2 G 1 2 D or 2 G 2 D or 3 D markings are connected to the device they may only be used in category 3G areas See also Instruction Manual Category 3G and Declaration of Conformity in Sections 8 and 9 Q 1 1 Specific information pay heed to the mains voltage when using voltage converters observe the maximum power rating when connecting sensors powered by more than 12 V supply when operating out of doors make sure that the battery compartment cover and sensor plug are screwed on tightly the connector sockets not in use are firmly capped and the USB connection cover is tightly sealed otherwise the IP65 protection cannot be guaranteed 4 33 www hoentzsch com U408_flowthermNT_B_e_110809 Operating Instructions hontzsch flow measuring technology flowtherm NT Re Q 1 2 Handling batteries always change charge all 4 batteries and check for correct polarity recharge batteries with a suitable charger away from the unit remove batteries when they are dead or if the device is not being used for any length of time to avoid leakage batteries contain hazardous substances and must never be disposed of in household waste 2 Scope of Delivery hand held unit flowtherm NT Operating Instructions and Data Sheet flowtherm NT FA VA or TA sensor s as ordered relevant Data Sheet for
37. s for the analog outputs 5 3 16 Menu gt Settings gt Output Settings for both analog output ports 1 and 2 5 3 16 1 Port Selection of the analog output port 1 or 2 Setting of the selected port under 5 3 16 2 5 3 16 2 Source Setting the source and the measured value equivalent for the analog output port selected under 5 3 16 1 Selection FA VA TA flow sensor depending on selection under 5 3 19 Equivalent initial value analog output at 0 V in m s final value analog output at 10 V in m s example 0 10V gt 0 40 m s or 0 10V gt 5 20 m s Pt100 temperature sensor Pti00 Equivalent initial value analog output at O V in C final value analog output at 10 V in C example 0 10V gt 20 100 C 24 33 www hoentzsch com U408_flowthermNT_B_e_ 110809 Operating Instructions hontzsch flow measuring technology flowtherm NT Re 5 3 17 Menu gt Settings gt Display values Settings for the display values Determining the quantity of the simultaneously displayed values input channels and the allocation of these values to the 3 input channels Settings for display values 5 3 17 1 Rows The number of rows determines in how many input channels 1 2 or 3 the measured values are displayed simultaneously after switch on 5 3 17 2 Row 1 Selection of which measured value is allocated to input channel 1 and displayed as Row 1 Selection Date display of the actual date Time
38. s set 1 press f2 LM START to start long term measurement The instantaneous value is displayed and the measurement period in seconds e g S00010 is continuously displayed in the status field above right 2 press f2 LM STOP to stop long term measurement the display is frozen and the average value is displayed above the measurement period in seconds e g S00030 3 press f2 LM OK to exit display of the average value the instantaneous value is once again displayed and is ready for a new measurement Start a new measurement as described under 1 LM Start mode is set 1 press f2 LM START to start long term measurement The instantaneous value is displayed and the measurement period in seconds e g S00010 is continuously displayed The bar above the control key description shows the progress of the measurement period in relation to the set interval 2 press f2 LM STOP before reaching the set interval and long term measurement stops the display is frozen and the average value is displayed above the measurement period in seconds e g SO0020 If LM STOP is not activated the measurement period runs up to the set interval then long term measurement is stopped the display is frozen and the average value is displayed above the measurement period in seconds e g S00030 3 press f2 LM OK to exit display of the average value the instantaneous value is once again displayed and is ready for a new measurement Start a new measu
39. technical documents The holding tank for the measuring gas is to be insulated in such a way as to guarantee that the device housing does not reach a higher temperature than the afore mentioned max ambient temperature also taking radiant and convective heat into consideration The Ex version equipment category 3G listed under Section 8 1 is to be used solely in areas in which the temperature of the measured gas the ambient temperature and the max permissible pressure overload stated on the type plate is not exceeded Sensors for use in pressurized pipelines are to be inserted or retracted in depressurized conditions only Non oberservance may result in serious injuries to personnel Switch off the supply voltage before disconnecting the cable socket U408_flowthermNT_B_e_110809 www hoentzsch com 31 33 hentzsch Cokes TAE flow measuring technology n 8 3 Conformity with Standards The equipment meets the requirements of the following European Standards EN 60079 0 2007 General Requirements EN 60079 15 2006 Type of Protection n 8 4 Technical Data Explosion protection vane wheel sensors FA vortex sensors VA and temperature probes Pt100 Ex nA IIC T6 Explosion protection thermal sensors TA Ex nA IIC T4 CE amp 3G Marking A 8 5 Installation The European Specifications for Assembly EN 60079 14 2009 as well as the general rules of technology and this Instruction Manual are authoritative when inst
40. tup menu after switch on ones ke hontzsch flow measuring technology Menu f1 LM Start f2 Logger Off Settings 5 3 24 Reset Sensor 5 3 25 FA input View 5 3 21 1 Basic settings 5 3 1 Settings 5 3 21 2 Type 5 3 1 1 Delete 5 3 21 3 m Range 5 3 1 2 t Material 5 3 1 3 m Directional sensing 5 3 1 4 Measurement settings 5 3 2 m Medium _ 5 3 2 1 t Section 5 3 2 2 Profile factor 5 3 2 3 Density correction 5 3 3 Display 5 3 4 m Damping _ 5 3 4 1 Unit 5 3 4 2 Pairs of values 5 3 5 VA input Basic settings 5 3 6 Type 5 3 6 1 Measurement settings 5 3 7 m Section 5 3 7 1 L___ Profile factor 5 3 7 2 Display 5 3 8 m Damping _ 5 3 8 1 Unit 5 3 8 2 Pairs of values 5 3 9 TA input Basic settings 5 3 10 Type 5 3 10 1 Measurement settings 5 3 11 m Section 5 3 11 1 Profile factor 5 3 11 2 Display 5 3 12 Damping 5 3 12 1 Unit 5 3 12 2 Pairs of values 5 3 13 PT100 input L Unit 5 3 14 Analog input 5 3 15 Output 5 3 16 Port 5 3 16 1 Source 5 3 16 2 Display values 5 3 17 Rows 5 3 17 1 Row1 5 3 17 2 Row2 5 3 17 3 Row3 5 3 17 4 Long term measurement 5 3 18 Mode 5 3 18 1 Device 5 3 19 Factory settings 5 3 20 Data logger 5 3 21 View 5 3 21 1 Settings 5 3 21 2 Delete 5 3 21 3 m Status 5 3 22 Profiles 5 3 23 L Switch off 5 3 25 U408_flowthermNT_B_e_110809 www hoentzsch com 13 33 hentzsch Cokes TAE flow measuring technology n
41. ug Arrow keys measured value dis play 4 gt shift between 1 2 and 3 values 4 Y scroll the 3 values with display of 1 and 2 values Switch on hontzsch flow measuring technology ok key measured value display switching the display light on or off Battery compartment for 4 batteries recharge able batteries Mignon AA For settings and other functions see Section 5 amp Please ensure that the correct flow sensor FA VA or TA is selected see under 5 3 19 2 33 www hoentzsch com U408_flowthermNT_B_e_ 110809 Operating Instructions flowtherm NT mE hontzsch mem flow measuring technology RRS Contents 1 Safety Instructions 1 1 Specific information 1 2 Handling batteries 2 Scope of Delivery 2 1 Description type plate 3 Technical Specifications 3 1 Operating conditions 3 2 Housing and connection 3 3 Electrical data 3 4 Measuring uncertainty 4 Initial Operation Startup 4 1 Connector sockets 4 2 Wiring diagram for the 8 pin connector plug 4 3 Wiring diagrams for the 12 pin connector plug 4 3 1 Analog outputs 0 10V 4 3 2 Analog input 4 20 mA 4 3 3 Analog input 0 10 V 5 Operation 5 1 Key functions 5 2 Setup menu after switching on 5 3 Parameter settings Troubleshooting Replacement Parts Instruction Manual Category 3G Declaration of Conformity Category 3G OONO U408_flowthermNT_B_e_110809 www hoentzsch com 3 33 hentzsch Cokes TAE flow measur
42. y and entered measured section see 5 3 2 2 the measured or entered working temperature and working pressure and the entered standard density standard conditions 0 C and 1013 hPa With the selection measure for temperature and pressure the respective input channel must be selected and set see 5 3 15 N m3 h standard flow rate in standard m3 hour calculated from flow velocity and entered measurement section see 5 3 2 2 measured or entered working temperature and pressure standard conditions 0 C and 1013 hPa With the selection measure for temperature and pressure the respective input channel must be selected and set see 5 3 15 5 3 5 Menu gt Settings gt Sensor gt FA Input gt Pairs of values If pairs of values is selected see 5 3 1 1 then the here alterable values for determining the measured value are applied as a calibration curve Selection Configuration enter the quantity of pairs of values maximal 30 for processing and display Pairs of values display and change of pairs of values A pair of values always consists of a velocity value in m s and a frequency value in Hz The condition being the pairs of values must be ever increasing i e the next velocity or frequency value must always be greater than the previous one U408_flowthermNT_B_e_110809 www hoentzsch com 17 33 hentzsch Cokes a flow measuring technology n Example for quantity 03 01 000 50m s 00010Hz 0
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