FAHM HART FT3351 Series, Руководство пользователя

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SMART Pressure Transmitter
FT3351 Series User Manual
July.2022
www.Faraboard.com 16 | P a g e
FAHM Co .
Industrial Automation
Doc. FT3351Rev1401-05
3.2.2.2 Max Range and Min Range and Transfer function
User can determine the maximum and minimum value of pressure which will be mapped to 4-
20mA of output signal. After this configuration the output signal will be mapped to min and max
values. So when the process pressure be equal to min-pressure, the output signal will be 4.0mA
and when it be equal to max-pressure, the output signal will be 20.0mA.
According to transfer function selected by user, for value between min and max pressure values,
the output signal will be produced with linear or square root curve.
parameter display Parameter tuning structure
Max-pressure
(The pressure
mapped to 20 mA)
Press <M> until this page is appeared on LCD. Then press
<Z> to access the amount of maximum pressure
(programing mode). You can change the amount of digits
by <S> and change the point and position of digits by <Z>.
After tuning this parameter, press the <Z> until all
characters blink. Then press <M> for the saving new
parameter and switching from programing mode to
operation mode
.
Min-pressure
(The pressure
mapped to 4 mA)
Press <M> until this page is appeared on LCD. Then press
<Z> to access the amount of minimum pressure
(programing mode). You can change the amount of digits
by <S> and change the point and position of digits by <Z>.
After tuning this parameter, press the <Z> until all
characters blink. Then press <M> for the saving new
parameter and switching from programing mode to
operation mode.
Transfer
Function
(linear or SQRT
function)
Press <M> until this page is appeared on LCD. Then press
<Z> to access the primary variable transfer function
(programing mode). You can select linear or SQRT
function by pressing <S>. After that, press <Z> until all
characters blink. Then press <M> for the saving new
parameter and switching from programing mode to
operation mode
The unit of min and max pressure values is same as primary variable.
According to the pressure sensor range, the entered values should not be out of sensor range
and also user should consider the minimum span of device when determine the desired min and
max value, otherwise device will not accept the user changes. Ordinary, this type of
pressure transmitters supports 1/100 turn down ratio. So the difference between min and max
value should be greater than (Sensor Range)/100.
For more accurate configuration please refer to pressure transmitter datasheet.
3.2.2.3 Decimal point