User’s & Technical Manual –
P/I LEVEL TRANSMITTER PIT7000
GELEC
Industrial Electronics
PAGE
18
APPLICATION FLUID
The application fluid has to be homogenous, having the same density at all points of its
volume and with relatively low viscosity, in order to allow a controlled and constant stream
of bubbles through it. For example, honey is not an appropriate fluid for this measuring
method. In addition, the fluid cannot be sensitive to a gas bubbling through it.
PIT7000 standard versions are factory calibrated with water in ambient temperature,
exploiting the whole operating pressure range of their pressure sensor (1m of water in
PIT7000-S1 / 5m of water in PIT7000-S5), unless otherwise stated on the product label. So,
the level which generates the maximum output signal corresponds to the maximum
pressure that your version can handle.
Hydrostatic pressure is affected from factors that cannot be easily specified (fluid/solution
density, temperature, gravitational acceleration etc.). In order to
define the maximum
level of your
application’s
specific fluid
, after having all electric and pneumatic
connections finalized, you can follow the procedure below.
Gradually fill the tank with the application fluid, while measuring the output signal.
When you reach maximum output (e.g. 20mA in 4-20mA range), stop the filling.
✓
This level is the maximum level that this specific fluid should reach during any
process stage. Higher level than that, will expose the PIT7000 sensor beyond its
operating pressure range.