Endress+Hauser Prothermo NMT532, Руководство по эксплуатации

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Operation Prothermo NMT532
54 Hauser
8.3.8 Temperature adjustment: VH70-VH79
Code Display Details
VH70 Element Select
(Element number
assignment) Item type Selection
Range 0 to 19
The element number for performing temperature adjustments is
selected (Element 0-15 = Element 1-16, 19 = Reference 100 Ω
resistance).
VH71 Zero Adjust
(Zero adjustment of
temperature
measurement
element) Item type Read / Write
Default 0
Range –1 000.0 to 1 000.0
Performs zero adjustment for individual elements that were selected in
VH70. Unlike a standard temperature device, the reading value can be
adjusted when the measured temperature shows minor correction
values.

If element No.2 displays 25.4 °C (77.72 °F) and a standard
temperature device displays 25.2 °C (77.36 °F), the matrix is set
to -0.2.Once set, the correction value of element No.2 based on
the actual measured value will be –0.2 °C (31.6 °F).
VH72 Adjust Span
(Adjustment of
temperature
measurement
element span) Item type Read / Write
Default 1
Range 0.8 to 1.2
Span adjustment is applied to all installed temperature measurement
elements. This correction value is multiplied by the actual measured
values.
VH73 Temperature X
(Temperature X) Item type Read only
Temperature of the elements that were selected in VH70. Also displays
each temperature measurement element that was displayed in VH10-
VH25. The value is calculated based on the following formula:
VH73: Temperature X = Unadjusted temperature x span (VH72) + Zero
offset (VH71)
VH74 Position X
(Element position) Item type Read / Write
Range 0 to 99 999 mm
Position of the elements that were selected in VH70. If "Unequal" was
selected in VH85, the position of each element can be set here.
VH75 Resistance X
(Element resistance) Item type Read only
Shows the measured resistance for elements that were selected in
VH70.
VH76 Resistance Adj.
(Element resistance
adjustment) Item type Read / Write
Default 0
Range –1 000.0 to 1 000.0
Adjusts the resistance of elements selected in VH70. Minor resistance
adjustments can be applied on the reading value.

Under identical environmental conditions, if the selected element
No.5 displays 100.3 Ω and a standard high-precision resistor
displays 100 Ω, -0.3 is set in this matrix. Once set, the correction
value of element No.5 based on the actual measured value will be
–0.3 Ω. Be careful when configuring this setting in VH76, as it
will apply to all elements.
VH77 Element Type
(Element type) Item type Selection
Selection Pt100, Cu90, Cu100, PtCu100, JPt100