Commissioning Of Multiple Resistance Thermometer; Temperature Related Settings - Honeywell Enraf VITO Instruction Manual

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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
W2= Protection level 2
Temperature dimension
TD=
MJ= Multi temperature distribution
MRT element position.
J0 – JD=
Element type
MT=
Number of elements
MN=
Instruction manual VITO
Average temperature measurement with MRT
Description
Enter protection level 2
One character; either 'C' or 'F'. Default set to C.
C : degrees Celsius
F : degrees Fahrenheit
Both dimensions have the same format.
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.
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.
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 = 90.2935 + T x 0.38826
th
range : -100 ÷ +250 °C (-148 ÷ +482 °F)
CN R = 90.4778 + T x 0.38090
th
range : -100 ÷ +250 °C (-148 ÷ +482 °F)
CS R = 90.5000 + T x 0.38730
th
range : -100 ÷ +250 °C (-148 ÷ +482 °F)
where : R
th
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
Two ASCII digits. This item specifies the number of elements
from the MRT, inclusive the spot element. The maximum number
of elements is 14.
= resistance MRT element [Ω]
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