Operation
Prothermo NMT539
46
Hauser
a
1
A
2
a
1
2
B
950 (37.4)
500 (19.7)
A0038556
18
WB probe calibration Unit: mm (in)
A
Reading value: Empty frequency: 1
500 Hz WB: 500 mm
B
Reading value: Full frequency: 3
000 Hz WB: 950 mm
a
Measuring range: 1
000 or 2
000
1
Oil phase
2
Water phase
Example: 950 mm (37.4 in) - 500 mm (19.7 in) = 450 mm (37.4 in)
Recalibrated WB probe linearity in operating tank
(3
000 Hz - 1
500 Hz) / 450 mm - 3.33 Hz / 1 mm (0.03 in)
• VH60 Empty Frequency: 1
500 Hz (Enter the VH52 value at 500 mm (19.7 in))
• VH61 Full Frequency: 3
000 Hz (Enter the VH52 value at 950 mm (37.4 in))
• VH62 Probe Length: 450 mm (Enter the calculated value)
• VH63 Water Factor: 3.33 Hz (Reference)
The WB probe linearity in an actual in-tank condition may be different from the
default condition. Liquid property (both oil and water), temperature inside the tank
and the surrounding environment have a significant impact on probe linearity.
Code
Display
Details
VH63
Water Factor
(Frequency per unit
liquid level)
Item type
Read only
Displays the liquid's vertical motion per 1 mm (0.03 in) in Hz
(frequency) as WB probe linearity. Calculation is performed based on
the following formula:
(VH61 Full Frequency - VH60 Empty Frequency) / VH62 Probe Length
= VH63 Water Factor
Using the Water Factor that has been determined based on the
actual WB measurements under given parameters, change in
distance can be calculated from the detection frequency.
VH67
Common Voltage
(Common voltage)
Item type
Read only
Range
0 to 255 (0 to 3 V)
Displays the operating voltage of the temperature measurement line
(signal and common). Voltage across the common line (between 0 and
3 V) is converted into a range from 0 to 255.
VH68
Output Current
(Output current)
Item type
Read only
Range
0 to 65
535
