Honeywell Enraf VITO, Instruction Manual

Page: 24 / 52

Average temperature measurement with MRT
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Instruction manual VITO Page 22
Item Name Description
MO = Temperature element offset Format according to item LD (default: +000.0000 m).
The offset represents the distance from the tank zero level to the
lowest position of the MRT.
Note:
In case of ullage measurement, distance MO is taken from the
upper reference point.
MI
= Switch hysteresis Format according to item LD (default: +000.1000 m).
The distance
MI
is a hysteresis around the switching point of the
temperature elements.
MP
= Product immersion depth Format according to item LD (default: +000.5000 m).
The distance
MP
specifies the minimum required liquid level
above an element before it is selected for the average product
temperature calculation.
MG = Gas immersion depth Format according to item L D . (default: +000.5000 m).
The distance
MG
specifies the minimum required distance before
the resistance value of the longest element is taken in the
average gas temperature calculation
TU
= Temperature status conversion One character (default: ‘T’)
This item is used to indicate the temperature status character in
case of a reduced or not guaranteed temperature accuracy. This
is the case when the temperature status is:
•
out of specified temperature range
•
exceeding differential temperature range
•
last valid level used
•
manual level used
•
level below lowest temperature element
If required, this item can be set to another character.
EX Exit Exit protection level 2