Honeywell Enraf VITO Instruction Manual page 15

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Item Name
W2= Protection level 2
Temperature dimension
TD=
Element type
MT=
Sensitive length temperature
MK=
probe
Temperature element offset
MO=
MI= Switch hysteresis
Product immersion depth
MP=
MG= Gas immersion depth
WP= Water probe length
MJ= Temperature distribution
TU= Temperature status
conversion
EX Exit
Instruction manual VITO
Average temperature measurement with VITO temperature probes
Description
Enter protection level 2
One character; either 'C' or 'F'. Default set to C.
C :
F :
Both dimensions have the same format.
Three ASCII characters. Selects the type of element connected
to the VITO Interface. For VITO probes, set item MT to: ' SPL '.
Format according to item LD (default: +030.000)
Refer to the above description about the sensitive length of the
VITO temperature probe. Enter that value in item MK.
Format according to item LD (default: +000.0000).
Item MO represents the distance from tank zero (datum plate) to
the lowest element (spot) in the sensor. Refer to the above
description about the offset to bottom of probe and add to this the
distance: tank zero - bottom of probe.
Format according to item LD (default: +000.1000 m)
The distance MI is a hysteresis around the switching point of the
temperature elements.
Format according to item LD (default: +000.5000 m)
The distance MP specifies the minimum required liquid level
above a thermocouple before it is taken in the average product
temperature calculation.
Format according to item LD (default: +000.5000 m)
The distance MG specifies the minimum required distance below
a thermocouple before it is taken in the average gas temperature
calculation.
Format according to item LD (default: +001.0000 m)
The water probe length is required to calculate the position of the
reference element. Refer also to section 4.1.
If no water probe is present, set item WP to zero (+000.0000).
One character (default: 'F')
This item is used to enable/disable the lowest element close to
the bottom of the probe (in the probe models 764D/766D/767D/
768D) from average product temperature calculation. Valid from
HCU/HPI software version A1.8 and higher.
F :
C :
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:
•
•
•
•
•
If required, this item can be set to another character.
Exit protection level 2.
degrees Celsius
degrees Fahrenheit
lowest element disabled for average temp. calc.
lowest element enabled for average temp. calc.
out of specified temperature range
exceeding differential temperature range
last valid level used
manual level used
level below lowest temperature element
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