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6. Functions - Key Features
This HERMetic instrument is a gas-tight portable multiple
functions gauging system that is designed to perform
under completely closed conditions in a single operation
3 measurements:
a)
U
llage (outage). Optionally innage is available¹.
b) Oil/water Interface Level.
Tape resolution: 1 mm (
1/16
”
)
Tape accuracy: ±3.2 mm for 30 m
(±
1/8
”
approx. for 100 feet)
Ullage/interface detection accuracy:
±2 mm (±
0.08
”
approx.)
Minimum detectable tank bottom interface or liquid level:
4 mm (0.16” approx.).
c)
T
emperature by continuous reading at any level.
Ambient temperature range: -20°C to 50°C
(-4°F to 122°F)
Sensor measurement range:-40°C to 90°C
(-40°F to 194°F)
Resolution: 0.01° or 0.1°, selectable
Accuracy over calibration range: ±0.1°C (0°C to 70°C);
±0.2°F (32°F to 158 °F)
Temperature reading: °C or °F, selectable.
This HERMetic device meets the requirements of API MPMS
Chapter 7 2001, table 3, ISO 4268 and IP PMM Part IV.
Thanks to the small diameter of the sensing probe this
instrument can be used with valves of diameters down to
25 mm (1”) only.
A tape protection tube prevents closing the valve on the tape
through inadvertence.
Gauging is done under completely gas tight conditions
therefore maintaining over- or underpressure in the tank.
The device is designed to withstand tank pressure up to
0.3 bar (4.4 psi).
¹ An additional device, usable with 2” valves only, can
be provided that allows
Reference Height
and
Innage
measurement. Available on “Visc” models.
Zero reference level
Tape protection
Tank top
Vapour
Ullage level
Product
Interface level
Water
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