Rixen VF-5204 User manual

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VF-5200 series Anemometer/Differential Manometer
Instruction Manual
Anemometer measurements forAir Velocity, Air Flow and Wind Pressure.
Manometer (Differential Pressure) Measurements.
VF-5204 (Micro Pressure) : Air Velocity 0~100m/s, Differential Pressure 70mbar
VF-5205 (High Pressure) : Air Velocity 0~400m/s, Differential Pressure 1000mbar
A. Specifications
Model No.
VF-5204 (Micro Pressure)
VF-5205 (High Pressure)
Measuring Range
Please refer the following table A.
Resolution
Area : 00.01ft²/0.001m² Air Flow : 1CFM/1CMM
Temperature : 0.1°C (0.1°F)
Air Velocity : 0.1m/s、1FPM、0.01Km/h、0.01Knots、0.01MPH
Differential Pressure : 1Pa、± 0.0001PSI、± 0.01mbar、0.0001bar、
0.01mmH2O、0.001inH2O、0.001mmHg、0.0001inHg
Area : 00.01ft²/0.001m² Air Flow : 1CFM/1CMM
Temperature : 0.1°C (0.1°F)
Air Velocity : 0.1m/s、1FPM、0.1Km/h、0.1Knots、0.1MPH
Differential Pressure : 10Pa、± 0.001PSI、± 0.1mbar、0.001bar、
1mmH2O、0.1inH2O、0.1mmHg、0.001inHg
Accuracy (at 25°C)
±0.25% F.S、TEB<1% ※TEB : Total Error Band
Area Setting
Max. 9.289m²/ 99.99ft²(For Air Flow measurement)
Measurement Unit
Area : ft²、m²Temperature : °C、°F Air Flow : CFM、CMM
Air Velocity : m/s、FPM(ft/min)、Km/h、Knots、MPH
Differential Pressure : Pa、PSI、mbar、bar、mmH2O、inH2O、mmHg、inHg
Media Compatibility
Dry air or non-corrosive gases and liquids
Display
Digital LCD display : Differential Pressure、Air Velocity、Temp.、Measurement Unit
Sampling Rate
Approx. 0.5 sec.
Output Signal
Digital Output : RS-232 / Modbus RTU protocol
(Differential Pressure、Air Flow、Air Velocity, Temp.、Max.、Min.、Avg. simultaneously)
Temp. compensation
0 ~ +60°C (+32°F ~ +140°F)
Main Functions
IP65 water and dust proof, Air Flow/Air Velocity/Wind Pressure measurements,
Fine ZERO & SPAN adjustments, ZERO setting, Max./Min./Avg. values, Data hold, Switchable °C/°F,
USB/RS-232 output, LED back-light, Auto/Manual shutdown, Fine Area adjustment
Baud Rate
57600
Operating Environment
-10 ~ +60°C (+14 ~ 140°F), 0~95%RH non-condensing
Power Supply
One 9 V battery or AC Adaptor (option)
Dimensions
150(L) × 75(W) × 28(D)mm (5.91 × 2.96 × 1.11 inches), Not including the pressure hose connector
Weight
Approx. 250g (without battery)
Approvals
RoHS, CE, IP65
※When you connect with the Pitot tube to measure the Air Velocity, The Min. Reading is:
VF-5204 (Micro Pressure) : 1.2m/s = 236FPM = 4.32Km/h = 2.33Knots = 2.68MPH
VF-5205 (High Pressure) : 4.0m/s = 780FPM = 14.4Km/h = 7.7Knots = 8.9MPH

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Measurement Range (Table A)
B. Instrument Description
○
1LCD display ○ 8AC Adaptor input
○
2Data Hold and Function buttons ○ 9USB output
○
3Save/confirm and Measurement Unit buttons ○ 10 RS-232 output
○
4Adjustment button ○ 11 Pressure terminal (+) (○ 12 connect with atmosphere)
○
5Adjustment button ○ 12 Pressure terminal (-) (○
11 connect with atmosphere)
○
6Model number and serial number ○
13 Power on/off
○
7Battery cover
※To keep the instrument functions steadily, please avoid dropping, impacting or disassembling.
C. Display Description ※MMA is MAX、MIN、AVG.

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Display
Description
Battery power indicator
Manual shutdown indicator
Data hold indicator
Differential Pressure indicator
Air Velocity indicator
Air Flow indicator
Adjustment indicator
Setup mode indicator
Units of measure for Air Velocity and Air Flow；
Including m/s、ft/min、Km/h 、Knots、MPH、CFM、CMM。
Units of measure for Pressure；Including Pa、PSI、mbar、bar、mmH2O、inH2O、mmHg、inHg。
Magnification indicator
Region A
Measurement display：Measurement value、Magnification value
Measurement display：unit (for setting the unit of measurement value)
Region B
Measurement display：Area value、Temperature value、MMA value
Measurement display：unit (for setting the unit of temperature)
Maximum positive pressure
Maximum negative pressure
Average value
Measurement value and MMA value * 100
Area unit indicator；Including m2、ft²。
Temperature unit indicator；Including℃、℉。
D. Key Description ※When you turn off the instrument and start again, it will revolve to the initial setting.
Key
Function
Description
LCD display
Save (Confirm)
Press the button to complete the all of setting, and turn to measurement mode.
Unit
On the measurement mode, press the and button and hold 3 second, enter
the setting mode for differential pressure, air velocity or air flow.
On the measurement mode, press the and button and hold 3 second, enter
the setting mode for temperature and area.
----
Data Hold
On the measurement mode, press the button to enter the data hold mode.
Function
On the measurement mode, press the and button and hold 3 second, enter
the setting mode for fine adjustment or zeroing.
On the measurement mode, press the and button and hold 3 second, enter
the setting mode for magnification.
----
Back-light
On the measurement mode, press and simultaneously to start back light.
About 30 second to close the back light.
----
Adjustment
On the hold mode, press to select the MAX, MIN andAVG.
Press the again, turn to the measurement mode and delete the record.

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On the setting mode of differential pressure, air velocity or air flow, press the
or to select the differential pressure unit, air velocity unit or air flow unit.
Press the and simultaneously to change the differential pressure, air
velocity or air flow.
On the setting mode of temperature and area, press the to change the
temperature unit, press the to change the area unit.
On the setting mode of fine adjustment and zeroing, press the to adjust ”+1”,
press the to adjust ”-1”. Press and simultaneously to zeroing, then turn
to the measurement mode.
On the setting mode of magnification, press the to ”+1” the digit, press the
to ”-1” the digit. Press and simultaneously to select the digit.
On the measurement mode, you can adjust the area if you select the “CMM”or
“CFM”unit. Press the to ”+1” the digit, Press the to ”-1” the digit, press
the to select the digit. (On the CMM or CFM unit, the temperature will not show.)
Power
On the shutdown condition, press the into the auto shutdown mode. Press the
and hold, then press the , LCD will shows the , unloose the and
, enter to the manual shutdown mode. Press the and hold one second,
LCD will shows “OFF”, unloose the , power off.
E. Operating Instructions
On the measurement mode, press to enter the any mode. (Refer the “D. Key Description”)
E-1 Measurement Mode :
On the “FLOW” indicator, if you select the ”CMM” or ”CFM” unit, region B will be changed from temperature value to area value.
E-1-1 Adjustment Area :
On the measurement mode, select the ”CMM” or ”CFM” unit, region B shows the area value. Press the , digit +1, press
the , digit -1. Press the to select the digit. Region Awill be transformed based on the adjusted area.
※The initial area is 00.01ft², maximum is 99.99 ft², minimum is 00.01ft². m²on this LCD is 0.0929* ft². Select digits will twinkle.

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E-2 Data Hold Mode :
On the measurement mode, press the to hold the data, press the to select the MMA. Press the again, turn to the
measurement mode and delete the record.
※MMA is MAX、MIN、AVG.
E-3 Power off :
On the shutdown condition, press the to turn on and into the auto shutdown mode. If the instrument is left without any
button operation, it will automatically turns off after 8 minutes. Press the and hold to power on, when the LCD shows
the , unloose the , will entry manual shutdown mode. Press the and hold again, when the LCD shows “OFF”,
unloose the to turn off. (If you unloose the before the “OFF”, the shutdown will fail.)
E-4 Setting Mode :
On the measurement mode, press the and hold, then press the or into the setting mode differential pressure, air velocity,
air flow, temperature or area. Press the and hold, then press the or into the setting mode for fine adjustment, zeroing or
magnification. On the setting mode, press the to save the settings and turn to the measurement mode.

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E-4-1 Exchange the differential pressure, air velocity and air flow :
On the differential pressure, air velocity and air flow, press the or to select the units. Press the and
simultaneously to exchange the differential pressure, air velocity and air flow. Press the to turn to the measuring mode.
※On the differential pressure and air velocity, the LCD will shows the point.
E-4-2 Setting Mode :
E-4-2 Unit of Temperature and area :
On the temperature and area mode, press the to select the temperature unit, press the to select the area unit, then press
the to turn to the measurement mode.
※On the temperature indicator, the LCD will shows the point.
E-4-3 Fine adjustment and zeroing :
On the fine adjustment and zeroing mode, press the or to adjust the pressure value, then press the to turn to the
measurement mode. If you press the and simultaneously, the pressure will zeroing, then turn to the measuring mode.

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E-4-4 Magnification :
On the magnification mode, press the or to adjust the digit. If you press the and simultaneously to select the
digit. Press the to turn to the measurement mode.
※The initial magnification is 100.00%, maximum is 200.00%, minimum is 0.01%. Select digits will twinkle.
F. RS-232 transfer protocol
RS-232 the transmission end is one way transfer via the three wires (touch ground) to input and output.
Using the original transmission line or cable under 10m is recommended.
Baud rate: 57600
Transfer status: / 8 / N / 1
Transfer content: (8BIT)
Read Holding Registers by Function 03H
F-1 Request Data Frame
Read the pressure, temperature and parameter.
Slave
address
Function
Starting
address
Hi
Starting
address
Lo
No. of Byte
Hi
No. of Byte
Lo
CRC
Lo
CRC
Hi
11H
03H
00H
00H
00H
06H
C7H
58H
F-2 Response Data Frame
Response value = 11-Byte (includes the position command CRC)
Slave address
Function
Byte count
Data-Pre【15:8】
Data-Pre 【7:0】
11H
03H
06H
01H
2CH
Data-Tem【15:8】
Data-Tem【7:0】
Data-Par【15:8】
Data-Par【7:0】
CRC Lo
CRC Hi
00H
FAH
00H
00H(10H)
5CH
93H
Data-Pre【15:0】is A value 0 x 012C = 300 (the real value needs to refer the parameter)
Data-Tem【15:0】is B value 0 x 00FA = 250 (the real value needs to refer the parameter)(no any function in “FLOW”unit)
【3:0】is considered as low pressure and wind pressure
>>>> 0000 is pa (the real value is 300) >>>> 0100 is mmH2O (the real value is 30.0)
>>>> 0001 is PSI (the real value is 0.0300) >>>> 0101 is inH2O (the real value is 0.300)
>>>> 0010 is mbar (the real value is 3.00) >>>> 0110 is mmHg (the real value is 3.00)
>>>> 0011 is bar (the real value is 0.0300) >>>> 0111 is inHg (the real value is 0.0300)
>>>> 1000 is m/s (the real value is 30.0) >>>> 1100 is MPH (the real value is 3.00)
>>>> 1001 is ft/min (the real value is 300) >>>> 1101 is CMM (the real value is 300)
>>>> 1010 is km/h (the real value is 30.0) >>>> 1110 is CFM (the real value is 300)
>>>> 1011 is knots (the real value is 3.00)
【3:0】is considered as high pressure and wind pressure
>>>> 0000 is pa (the real value is 30.0) >>>> 0100 is mmH2O (the real value is 300)
>>>> 0001 is PSI (the real value is 0.300) >>>> 0101 is inH2O (the real value is 30.0)
>>>> 0010 is mbar (the real value is 30.0) >>>> 0110 is mmHg (the real value is 30.0)
>>>> 0011 is bar (the real value is 0.300) >>>> 0111 is inHg (the real value is 0.300)
>>>> 1000 is m/s (the real value is 30.0) >>>> 1100 is MPH (the real value is 30.0)
>>>> 1001 is ft/min (the real value is 30.0) >>>> 1101 is CMM (the real value is 300)
>>>> 1010 is km/h (the real value is 30.0) >>>> 1110 is CFM (the real value is 300)

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>>>> 1011 is knots (the real value is 30.00)
【4】is considered as digit*100
>>>> 1 is *100 >>>> 0 is 0*100
【7:5】is considered as B value
>>>> 000 is ℃(the real value is 25.0) >>>> 001 is ˚F (the real value is 25.0)
The reading is 300pa 25℃(the above is the low pressure.) / The reading is 3000pa 25℃(the above is the high pressure.)
F-3 Response Data Frame
Response value = 11-Byte (includes the position command CRC)
Slave address
Function
Byte count
Data-Pre【15:8】
Data-Pre【7:0】
11H
03H
06H
FFH
81H
Data-Tem【15:8】
Data-Tem【7:0】
Data-Par【15:8】
Data-Par【7:0】
CRC Lo
CRC Hi
02H
C4H
00H
28H
84H
FFH
Data-Pre【15:0】isA value 0 x 1A79 = 6777 (the real value needs to refer the parameter)
Data-Tem【15:0】is B value 0 x 1A79 = 6777 (the real value needs to refer the parameter)
Data-Par【15:0】is parameter value 0 x 009E = 1001 1110 ---【15:8】no value
The reading is -12.7m/s 70.8 ˚F
F-4 Response Data Frame
Response value = 11-Byte (includes the position command CRC)
Slave address
Function
Byte count
Data-Pre【15:8】
Data-Pre【7:0】
11H
03H
06H
1AH
79H
Data-Tem【15:8】
Data-Tem【7:0】
Data-Par【15:8】
Data-Par【7:0】
CRC Lo
CRC Hi
XXH
XXH
00H
9EH
84H
FFH
Data-Pre【15:0】isA value 0 x 1A79 = 6777 (the real value needs to refer the parameter)
Data-Tem【15:0】is random number without reference value.
Data-Par【15:0】is parameter value 003E = 0011 1110 ---【15:8】no value
The reading is 6777*100CFM.
F-5 Conversions and Formulas
1pa=0.000145psi=0.01mbar=0.00001bar=0.1019716mmH2O=0.00401inH2O=
0.0075mmHg=0.0002953inHg
1m/s=196.85ft/min=3.6km/hr=1.944knots=2.237MPH
CMM=m3/min CFM=ft3/min 1ft=0.3048m
G. Precautions
1. This instrument must only be operated within its specifications, or it will be damaged.
2. This instrument has waterproof and dustproof function; please do not use it in a high temperature environment or with
corrosive materials to avoid leakage or damage.
3. On the measuring wind pressure, wind speed and temperature, because the unstable temperature environment or tube
pressure, please multiple sampling or extend the capturing for the signal interval.
4. Use the original pitot tube is suggested for the more accurate measuring value.
5. When the instrument is not use for a long time, please keep it and the all accessories in a dry environment, also please avoid
direct sunlight.
6. If there are any operation questions or malfunction, please contact your local distributor or our service department.