ASAIR AFM0725 Instruction Manual Download Page 10

4.3  Voltage  output

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5.  Work  interface  and  interface  operation

July  2022

The  voltage  output  of  the  AFM0725  is  a  linear  output.  The  relationship  between  voltage  and  flow  is:  Voltage  (V)  

=  1  +  Instantaneous  flow  (L/min)  ×  0.16

Figure  8.  The  cumulative  flow  

interface  menu  page  has  4  levels,  and  the  function  description  of  each  level  is  shown  in  Table  9.

When  the  lock  screen  icon  (ÿ  in  Figure  7)  is  on,  press  and  hold  the  setting  key  for  5  seconds  to  unlock  and  enter  the  menu  page,  and  press  the  up  and  down  keys  to  select  the  parameters  to  

be  set.  If  there  is  no  operation  within  30  seconds,  the  system  enters  the  lock  screen  state.  When  the  alarm  switch  status  icon  (ÿ  in  Figure  7)  is  on,  it  means  the  alarm  function  is  turned  on,  and  when  

there  is  no  icon,  it  means  the  alarm  is  turned  off.  To  view  the  cumulative  flow,  on  the  main  page,  press  the  down  key  to  jump  to  the  cumulative  flow  display  interface,  as  shown  in  Figure  8.

Figure  7.  Introduction  to  screen  icons

ÿ  is  the  485-communication  address;  ÿ  is  the  fluid  type;  ÿ  is  the  alarm  switch  status;  ÿ  is  the  485  communication  

status;  ÿ  is  the  lock  screen  icon;  ÿ  is  the  instantaneous  flow;  ÿ  is  the  instantaneous  flow  unit.

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Summary of Contents for AFM0725

Page 1: ...and explosive gases It has been widely used in university scientific research fire protection environmental monitoring tobacco smart agriculture food medicine and other industries The range accuracy...

Page 2: ...n address of the flowmeter gas temperature cumulative flow and instantaneous flow The buttons include up down and set buttons and the LCD lights 1 and 2 are the upper limit warning light and the lower...

Page 3: ...ine GND External output 2 black line External output 1 Figure 3 Schematic diagram of device 8Pin female socket RS485B RS485A power cable GND 5 green line RS485A 7 pin 3 Table 2 Pinout Definitions brow...

Page 4: ...Shell material describe pinout Repeatability 50ms PBT precision RS485 NPN open collector output 1 5V linear voltage output Air 25 C 1 standard atmosphere 0 85W typ Pressure Standard Calibration param...

Page 5: ...display face July 2022 down 1 For the piping of the product inlet outlet please reserve a straight pipe part with a length of more than 12cm and the inner diameter of the straight pipe is less than 4...

Page 6: ...efinition of AFM0725 is shown in Table 5 The digital output communication mode of AFM0725 gas mass flowmeter is RS485 communication and the communication parameters are shown in Table 4 4 Product Comm...

Page 7: ...03 06 0 No alarm for lower limit address 1 6 4 Carbon dioxide CO2 0 L min 10 0x003B Read and write 03 06 1 10 baud rate model 10 03 L min 0x0035 03 10 03 0x00Fa 1 flow unit 1 Upper limit alarm 0 65535...

Page 8: ...slave address Register 0x0000 stores the instantaneous flow value Received data bytes Table 8 Format Table for Host Send Write Register Command CRC code is used for verification 03 read multiplex regi...

Page 9: ...L min the NPN open collector output port corresponding to external output 1 is closed closed alarm www aosong com The C language code for calculating the CRC code is as follows AFM0725 has 2 NPN open...

Page 10: ...e and press the up and down keys to select the parameters to be set If there is no operation within 30 seconds the system enters the lock screen state When the alarm switch status icon in Figure 7 is...

Page 11: ...one level menu Device Information Select the type of gas to be tested packing list Alarm system Back to one level menu quit AFM0725 pinout Factory reset the product Back to secondary menu Upper limit...

Page 12: ...Failure to follow the recommendations could result in death or serious personal injury The company will not The technical specifications are indicated in the product manual of Aosong Electronics If t...

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