Honeywell Enraf VITO User Manual

Average temperature measurement with MRT
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Instruction manual VITO Page 21
3.2 Commissioning of Multiple Resistance Thermometer
The commissioning of the optional average temperature part should be performed after the basic commissioning
of the level gauge or indicator.
3.2.1 Temperature related settings
Refer to figure 3.1
Item Name Description
W2= Protection level 2 Enter protection level 2
TD= Temperature dimension One character; either ‘C’ or ‘F’. Default set to C.
C : degrees Celsius
F : degrees Fahrenheit
Both dimensions have the same format.
MJ= Multi temperature distribution One character; either ‘F’ or ‘T’. Default set to F.
This item determines whether fixed element positions are taken
or configurable element positions via the items J0 .. JD.
F : Fixed element positions (default)
T : Configurable element positions (as per items J0 .. JD)
The fixed element positions are described at section 3.3.2.
J0 – JD= MRT element position. Format according to item LD (default: +000.0000 m).
J0 through JD represent the distance from the end of the probe
(nearest to tank zero level) to the MRT element if selected by
item MJ.
MT= Element type Three ASCII characters (C3 C2 C1). Selects the element type
connected to the 762 VITO MRT, with its characteristics.
C3 R refers to an MRT without spot element
Q refers to an MRT with spot element
C2 C1 CB R
th
= 90.2935 + T x 0.38826
range : -100 ÷ +250 °C (-148 ÷ +482 °F)
CN R
th
= 90.4778 + T x 0.38090
range : -100 ÷ +250 °C (-148 ÷ +482 °F)
CS R
th
= 90.5000 + T x 0.38730
range : -100 ÷ +250 °C (-148 ÷ +482 °F)
where : R
th
= resistance MRT element [Ω]
T = temperature MRT element [°C]
PS *) Pt100 small range
range: -20 ÷ +120 °C (-4 ÷ +248 °F)
PL *) Pt100 large range
range : -200 ÷ +250 °C (-328 ÷ +482 °F)
NI *) Ni191 mid temp/tri temp
range: -20 ÷ +120 °C (-4 ÷ +248 °F)
*) From HCU/ICU_HPI software version A1.9 and higher
MN= Number of elements Two ASCII digits. This item specifies the number of elements
from the MRT, inclusive the spot element. The maximum number
of elements is 14.

Honeywell Enraf VITO Specifications

General

Brand	Honeywell
Model	Enraf VITO
Category	Temperature Controller
Language	English