Prothermo NMT539
Operation
Hauser
33
VH27 Multi Spot Type: Multi temperature of the display array
When elements with unequal lengths are installed on each input cable, out of the
elements that are submerged in the liquid phase, the temperature measurement element
in the liquid phase that is the closest to the liquid level is considered the average
temperature.
The average liquid temperature is the element temperature (Element No.3:
26.0 °C (78.8 °F) (T3)) of the liquid phase that is the closest to the liquid level.
2
3
4
5
6
7
1
8
10
11
9
12
A0038549
12
Multi temperature
1
NMT539 converter-only type + Other brand's average temperature probe
2
Pt100 element No.5: 2.45 °C (76.1 °F) (T5)
3
Pt100 element No.4: 24 °C (75.2 °F) (T4)
4
Pt100 element No.3: 26.0 °C (78.8 °F) (T3)
5
Pt100 element No.2: 25.5 °C (77.9 °F) (T2)
6
Pt100 element No.1: 25.0 °C (77.0 °F) (T1)
7
To converter
8
Input signal cable
9
Gas (vapor) phase
10 Level
11 Liquid phase
12 Probe bottom
5.3.4
Upper and lower limits of temperature measurement
elements: VH28-VH29
Code
Display
Details
VH28
Lower Limit
(Minimum
temperature
measurement
element value)
Item type
Read / Write
Default
–20.5 °C (–4.9 °F)
Range
–999.9 to 999.9 °C (–1
767.82 to 1
831.82 °F)
The lower limit of a temperature measurement element is set and used
as a reference for determining an element short circuit.
VH29
Upper Limit
(Maximum
temperature
measurement
element value)
Item type
Read / Write
Default
245 °C (473 °F)
