SMART Pressure Transmitter
FT3351 Series User Manual
July.2022
27 |
P a g e
FAHM Co
.
Industrial Automation
Doc. FT3351Rev1401-05
The device will calculate the corresponding Min pressure value and max pressure value
automatically with bellow formulas:
In level mode:
𝑃𝑚𝑖𝑛 = ρ ∗ g ∗ (LRV − h₀)
𝑃𝑚𝑎𝑥 = ρ ∗ g ∗ (HRV − h₀)
In volume mode:
𝑃𝑚𝑖𝑛 = ρ ∗ g ∗ (LRV ∗
V
H
− h₀)
𝑃𝑚𝑎𝑥 = ρ ∗ g ∗ (HRV ∗
V
H
− h₀)
In mass mode:
𝑃𝑚𝑖𝑛 = g ∗ (LRV ∗
V
H
− ρ ∗ h₀)
𝑃𝑚𝑎𝑥 = g ∗ (HRV ∗
V
H
− ρ ∗ h₀)
In density mode:
𝑃𝑚𝑖𝑛 = LRV ∗ g ∗ (H − h₀)
𝑃𝑚𝑎𝑥 = HRV ∗ g ∗ (H − h₀)
So according to the pressure sensor range, the calculated 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.
3.2.7 Reset Factory
User can recall all factory settings using bellow menu.
The default password for this operation is “74”
parameter
display
Parameter tuning structure
PASS
(Password factory
setting)
Press <M> until this page is appeared on LCD. Then press
<Z> to access the reset factory setting (programing
mode). You can enter the password by <S> and change
the point and position of digits by <Z>. After entering the
correct password, press the <Z> until all characters blink.
Then press <M> for recall the factory settings and restart
the device.
