Interface Detection; Temperature Measurement - Honeywell HERMetic UTImeter Gtex Chem IIC Operation And Service Manual

6.2.3.

Interface detection

The principle consists of a conductivity
measurement
electrode and a grounded electrode.
When the liquid is conductive (as water),
the ullage sensor detects the presence of
The reaction point is located 4 mm (5/32") from the sensor bottom and identical with the zero-point of the tape graduation.
6.2.4.

Temperature measurement

The sensing element is a Platinum Resistance
Temperature Detector
element is located in the temperature electrode,
which is filled in with a heat transfer compound
paste to reduce the response time.
The RTD element signal is digitized, and then all
errors (offset, non-linearity and drift) are corrected
and compensated by the micro-controller located
in the sensor probe.
characteristics are stored in the sensor memory
The reaction point is located 4 mm (5/32") from the sensor bottom and identical with the zero-point of the tape graduation.
50489/GTEX Chem IIC/1805
between an active
Air
Oil
Oil
4 mm
Water
Interface sensor
(RTD) element. The
The RTD element
Air
Liquid
4 mm
the liquid as well and the conductivity
electrodes
circuits modulate the coded signal to
generate the intermittent beep.
Interface level
Figure 7-4
and are dedicated to one sensor. For this reason,
changing a sensor does not require a new
calibration.
All data are serialised and sent by the micro-
controller to the Display Unit.
Temperature settings (resolution, scale) are easy
to select by pressing the 5-key control panel.
Temperature level
Temperature sensor
Figure 7-5
17
and associated electronic
UTImeter Gtex Chem IIC