WLA200 Rev140407
18
CALIBRATION
The TankVision has unique calibration programs that enable it to be used on tanks
of all shapes and sizes.
Note:
The standard pressure sensor is limited to a maximum tank height of
ten feet.
Overview
Magnet Sensor
The calibration programs are accessed by activating the
CAL.
magnet sensor that
is located at the bottom on the front of the display module. The sensor is activated by
placing the north pole of a small magnet in close proximity of the sensor. (The sensor
will not respond to the south pole of the magnet.) The magnet is then moved about
1-inch away, this will produce an electronic signal that is similar to a button being
released. If the LEDs in the display do not change try moving the magnet further away
from the sensor.
In these procedures the term ‘swipe’ will mean to move the magnet up to and then
away from the magnetic sensor.
Non-Linear Calibration
The first program is a non-linear calibration procedure that can be used for any shape
or size tank. This procedure must to be used for irregular shape tanks (e.g.: T-shape,
oval, elliptical, tank with through hole, etc.). The program compares the pressure in the
tank, as the tank fills at a steady rate, to time. This provides for very accurate displays.
Linear Calibration
The second program is a linear calibration procedure that can only be used when
the tank volume is proportional to the height. This would include square or rectangular
shape tanks with no irregularities. It is quick way of calibrating a tank but not as accurate
as the non-linear procedure. The program compares a full tank to an empty tank, takes
the difference and divides it into eight equal volume displays.
Full Tank Correction
This program is for use to fine tune the tank display after a non-linear or linear
calibration procedure has been completed. It would only be needed in cases where
one type of liquid is used for calibration when a different liquid would normally be in
the tank. For example this would allow the basic calibration of a foam tank to be done
using water and then the calibration would be fine tuned when the tank is filled with
foam concentrate.
Summary of Contents for TankVision WLA200
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