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KEM FAU 50, Руководство пользователя

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21 

 

 

Measuring Mode 

Version: FAU_M_EN_170308_E004 

4.2.5. 

MIN Limit (terminals 17/18) 

The  open-collector  track  of  this  output  conducts,  when  the  actual  flow  bypasses  the  MIN  limit  (see  chapter 

3.4.3) The output  is blocked ("OC-track blocked"), when the actual flow  exceeds the value for MIN  limit plus 

hysteresis see chapter 3.4.4). 

4.2.6. 

Frequency Output 1:1 (terminals 18/20) 

The  frequency  input  signal  of  CH1  is  isolated  by  an  optocoupler.  The  untreated  and  potential-free  signal  is 

available for further processing at terminals 19 and 20. Frequency and duty cycle of the original signal remain. 

4.2.7. 

Analogue Output 0/4 to 20 mA or 0/2 to 10 V (terminals 1, 2) 

These two terminals give an analogue signal proportional to the assigned 

range (see chapter 3.2). The signal is a current or voltage signal according 

to  the  position  of  the  external  slide  switch.  The  signal  mode  can  be 

selected via the external lefthand slide switch  
 
 

4.2.8. 

Forward/Bachward Output (terminals 3/4) 

 

4.2.9. 

Pickup Supply (terminals 3/4) 

This terminal provides a supply voltage of 12 V DC for KEM Pickups or Amplifiers. The current is restricted to  

20 mA! 

4.2.10. 

Frequency Inputs CH1 and CH2 (terminals 6/7 and 8/7) 

Inputs signals: 3 to 5,000 Hz – signals according to NAMUR or square wave voltage suitable.  
CH1 serves the evaluation, CH2 is only used for detection of the rotational direction!  
CH1 receives the outputs signal of the KEM Amplifier. You may add a 90°-phase-shifted signal to CH2 to detect 

the rotational direction.  
CH2 cannot be used to realize twin channel operation. 

4.2.11. 

Supply Voltage of the FAU (terminals 9/10) 

The FAU can be supplied with 24 V DC, 24 V AC, 115 V AC and 230 V AC. For DC-supply terminal 9 re 

24 V and terminal 10 requires 0 V. 

 

Содержание FAU 50

Страница 1: ...Certified according to DIN EN ISO 9001 www kem kueppers com info kem kueppers com Manual FAU 50 from version no V03 01 99 ...

Страница 2: ...2 Version Version FAU_M_EN_170308_E004 Manual Version FAU_M_EN_170308_E004 SW Version This manual is valid for Main SW V03 01 99 and higher ...

Страница 3: ...2 3 Response Time of the Analogue Output 14 Parameter level Divider Scaling 14 3 3 3 3 1 Unit for the Divider 14 3 3 2 Entering the Dividing Factor 14 3 3 3 Pulse Time for External Counters 15 Parameter Level Limit Programming 15 3 4 3 4 1 Limit ON OFF 16 3 4 2 Flow Limit Max 16 3 4 3 Hysteresis for Limit MAX 16 3 4 4 Flow Limit MIN 17 3 4 5 Hysteresis for Limit MIN 17 Battery Lifetime 17 3 5 4 ME...

Страница 4: ...erminals 15 16 20 4 2 5 MIN Limit terminals 17 18 21 4 2 6 Frequency Output 1 1 terminals 18 20 21 4 2 7 Analogue Output 0 4 to 20 mA or 0 2 to 10 V terminals 1 2 21 4 2 8 Forward Bachward Output terminals 3 4 21 4 2 9 Pickup Supply terminals 3 4 21 4 2 10 Frequency Inputs CH1 and CH2 terminals 6 7 and 8 7 21 4 2 11 Supply Voltage of the FAU terminals 9 10 21 5 SPECIFICATIONS 22 Technical Data 22 ...

Страница 5: ... limits flow limit MIN flow limit MAX Potential free limit switch outputs 1 1 frequency output Detection of rotational direction Reverse flow changes the polarity of the analogue output resets the internal counter and activates a switch output Versatile inputs for active and passive pickups Operating Principle 1 2 An edge controlled pulse width measurement combined with programmable time base func...

Страница 6: ...plays A description of each display will follow in chapter 4 To get into the programming mode simultaneously press and After that the first parameter level will appear in the display Parameter Levels 2 2 The levels cannot be changed They contain various parameters adaptable to your application 1 st line Description of the parameter level 2 nd line Key functions The sign is for key The FAU goes bac...

Страница 7: ... not within the allowable range the FAU will not accept it and the last entered setting appears Only can you continue when your settings are within the allowable range Ranges for the numerical parameters Parameter Min Value Max Value Remarks K Factor 10 00 500000 00 pulses per litre Density 700 2000 kg per m Gate Time 104 3224 msec Divider 1 90000 decimal point and unit according to settings Pulse...

Страница 8: ...ns for some parameters like units or analogue offset pre selection litres per minute To scan the pre selections for the present parameter When the desired default appears enter with Summary of the pre selections Totals Rate kg l min Grams kg m Litres ccm m ccm g min Imp l h Gal kg h lb ccm s g s Gal m lb m ...

Страница 9: ...mming this level is a pre condition for operating the FAU Four parameters have to be entered With mass related units there are five parameters Press to programme the first parameter of this level 3 1 1 K Factor of the Flow Meter Each KEM Flow Meter is delivered with a calibration record which shows the average K factor of the flow meter This factor defines the number of pulses per litre over the e...

Страница 10: ... s g s Gal m lb m As soon as the desired unit appears confirm with After that the next parameter appears 3 1 3 Decimal Point Position for the Flow Rate Display DP Flow Display You should display your measuring results with a resolution in accordance with your application Max three digits after the decimal point are possible NOTE Changing the decimal point position will also affect the limits The F...

Страница 11: ...Enter with after that the next parameter appears Gate time The parameters Gate time and Gate memory enable you to adapt the temporary transmission behaviour between frequency and analogue output to your requirements After the gate time has passed the FAU calculates an average frequency for the measuring interval thereby calming signal fluctuations Periodic disturbances e g pressure fluctuations wi...

Страница 12: ...therefore reduce the influence of the actual flow value on the previous measuring results by chosing a higher value for gate memory Enter with after that the FAU goes back to the K Factor level From the parameter level there are three possibilities to go on To go through the present parameter level again in the above mentioned order and change single parameters if necessary To go back to the measu...

Страница 13: ... 25 to 2 74 ltr min 20 mA correspond to a flow rate of 2 74 l min starting at 1 25 ltr min WARNING The start value must be smaller than the final value If this is not the case a warning in the display will require you to enter values again beginning with the start value Analogue start value Enter the flow rate for 0 4 mA or 2 V To chose the cursor position To select 0 to 9 for the present cursor p...

Страница 14: ...ly the counter with pulses proportional to the volume flow In this level you can programme the dividing factor and the pulse time Apart from that the FAU has an integrated totaliser Press to start programming 3 3 1 Unit for the Divider Keep to the unit entered for the flow rate see chapter 3 1 2 as it determines the unit and resolution for the dividing factor If you selected kg min for the flow ra...

Страница 15: ...unter shall count on one unit with each ccm The required pulse time t p can be calculated as follows 4000 ccm 𝑚𝑚𝑚𝑚𝑚𝑚 60 s min 1 𝑐𝑐𝑐𝑐𝑐𝑐 66 67 𝐻𝐻𝐻𝐻 𝑡𝑡 𝑝𝑝 14 99 𝑚𝑚𝑚𝑚 50 100 7 5 𝑚𝑚𝑚𝑚 𝑡𝑡 𝑝𝑝 Entering with will terminate programming for the divider The display is showing the present parameter level There are three possibilities to continue to go through the present parameter level again in the above ment...

Страница 16: ...r the max limit If the flow rate exceeds this limit the switch output MAX will be activated Enter the max limit keeping to the unit and resolution selected under chapter 3 1 2 and 3 1 3 Example the volume flow must not exceed 2 854 litres per minute to chose the cursor position to select 0 to 9 for the present cursor position to enter Enter with and continue with the hysteresis for the max limit 3...

Страница 17: ...ow variations of 7 0 in the lower range the hysteresis should be approx 7 2 to chose the cursor position to select 0 to 9 for the present position to enter Entering with will terminate programming Press to get back to the measuring mode Battery Lifetime 3 5 The FAU has a battery to maintain all parameter settings and counts when the FAU is turned off With normal operation 8 h per day the battery w...

Страница 18: ...4 1 2 Actual Flow in Unit and Calmed Measuring Frequency The FAU derives the calmed measuring frequency from the incoming measuring frequency considering the settings for Gate time see chapter 3 1 5 and Gate memory see chapter 3 1 6 1 st line scaled flow rate with unit and state limit MAX exceeded not exceeded 2 nd line calmed input frequency state limit MIN bypassing no bypassing 4 1 3 Actual Flo...

Страница 19: ...e must be maintained 1 st line scaled flow rate with unit 2 nd line state limit MIN MAX No Limit no bypassing 1 st line scaled flow rate with unit 2 nd line state limit MIN Limit MIN limit bypassed 1 st line scaled flow rate with unit 2 nd line state limit MAX Limit MAX limit exceeded 4 1 6 Actual Flow with Unit and Analogue Output Level The sign I shows the present level of the analogue output Th...

Страница 20: ... while this input is active The FAU maintains the present analogue level which is available at the analogue output Reverse flow detection is disabled The output holds the last detected direction Totaliser and pulse counter remain on their present count Limit MIN and MAX are inactive HOLD active in the 2nd line of the display indicates the HOLD input is active The display of the actual flow is not ...

Страница 21: ...s a current or voltage signal according to the position of the external slide switch The signal mode can be selected via the external lefthand slide switch 4 2 8 Forward Bachward Output terminals 3 4 4 2 9 Pickup Supply terminals 3 4 This terminal provides a supply voltage of 12 V DC for KEM Pickups or Amplifiers The current is restricted to 20 mA 4 2 10 Frequency Inputs CH1 and CH2 terminals 6 7 ...

Страница 22: ... Range 3 up to 5 000 Hz Frequency Inputs CH 1 and CH 2 Current switch level NAMUR DIN 19234 Voltage switch level UL 6 V UH 9 V Umax 30 V Control Inputs Reset hold active for UL 3 V tmin 100 ms Switched for analogue output and totaliser potential reference 0 V of pickup supply terminal 7 Analogue Output 0 2 up to 10 V or 0 4 up to 20 mA Switchable via external switch on the housing resolution 13 bi...

Страница 23: ...7 0 V potential reference for external supply and control inuputs HOLD and RESET 8 frequency input CH2 NAMUR or voltage level 9 supply voltage FAU 24 V DC 115 V AC oder 10 supply voltage FAU 230 V AC 4 VA 15 11 RESET low active control input connect with terminal 7 0 V 12 HOLD low active control input connect with terminal 7 0 V 13 collector pulse output Umax 30 V DC Imax 50 mA low inductive 14 em...

Страница 24: ...24 Specifications Version FAU_M_EN_170308_E004 Connection Schemes 5 3 ...

Страница 25: ...0 F 49 9941 9423 23 production kem kueppers com KEM Sales Liebigstraße 5 85757 Karlsfeld Deutschland T 49 8131 59391 100 F 49 8131 92604 sales kem kueppers com KEM Service Repairs Wettzeller Straße 22 93444 Bad Kötzting Deutschland T 49 9941 9423 37 F 49 9941 9423 24 service kem kueppers com More distributors and partners can be found at www kem kueppers com Original KEM document FAU_M_EN_170308_E...

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