Technical information

Technical Information 17
Radar Tank Gauge
Performance
Certifications & Approvals
Wetted Parts
7530 RTG
7531 RTG
7532 RTG
7533 RTG
Hysteresis
0.3 mm (1/64")
Absolute accuracy
better than ±1 mmFree space 7500
Series Radar Tank Gauge radar
gauges typically provide accuracy of
±0.5 mm (2 sigma value).
The 7500 Series Radar Tank Gauge
7532 RTG stilling well radar gauges
typically provide accuracy of ±
0.8 mm (2 sigma value).
Depending on the respecitve national
gauging regulations, the admissible
errors AFTER installation of the
instrument on the tank are ±3 mm
(OIML), ±4 mm (API),
Non-repeatability
0.3 mm (1/64")
Long-term drift
The long-term drift is within the
specified accuracy.
Influence of
ambient
temperature
Within the1 specified accuracy
according to OIML R85
Maximum fill speed
By the first pass trough of measuring
range: 100 mm/min., thereafter
unlimited.
Reaction time
The reaction time depends on the
parameter settings (min. 1 s). In case
of fast level changes, the instrument
needs the reaction time to indicate
the new value.
Resolution
digital: 0.1 mm
analog: 0.03 % of measuring range
Settling time
Typical 15 sec
CE approval - The measuring system meets the legal
requirements of the EC-guidelines. Varec confirms the
instrument passing the required tests by attaching the CE-
mark.
Ex approval - See "Ordering information"
External standards and guidelines
To conception and development for Micropilot S have been
followed the external standards and guidelines:
EN 60529 - Protection class of housing (IP-code)
EN 61010 - Safety regulations for electrical devices for
measurement, control, regulation, and laboratory use.
EN 61326 - Emissions (equipment class B), compatibility
(appendix A – industrial area)
NAMUR - Standards committee for measurement and control
in the chemical industry
API (American Petroleum Institute) - Particularly "Manual of
Petroleum Measurement Stadards".
OIML R85 (Organisation Internationale de Métrologie Légale)
Overspill protection - WHG, see ZE243F/00/de.
Custody type approval - All aspects of OIML R85 are fulfilled.
RF approvals - R&TTE 1999/5/EG, FCC CRF 47, part 15
Marine certificate - GL (Germanischer Lloyd)
Type of antenna / Seal
Media Antenna
cone
Wetted
parts
Standard / Viton
-20…+200 °C
(-4 °F…+392 °F)
for non-
conductive
media
PTFE PTFE and
1.4571
Standard / EPDM
-40…+150 °C
(-40 °F…+302 °F)
Standard / Kalrez
0…+200 °C
(+32 °F…392 °F)
Standard
-20…+200 °C
-4 °F...392 °F)
PTFE seal (non wetted Viton
O-Ring)
for
conductive
media
PTFE PTFE and
1.4571
Note! All process connections are gas-tight. The horn ver-
sion for conductive media is resistant to hot vapour.
Rod gas-tight,
antistatic
1.4435 / SS 316 L / PTFE
Stab gas-tight
a
a.Rod antenna with FDA listed materials, white PTFE (TFM 1600), 3A
approved in combination with 2" and 3"
Tri-clamp process connection.
1.4435 / SS 316 L / PTFE (TFM 1600)
Planar, gas-tight
1.4435 / HNBR (Hydrated Nitrit Butadien
Rubber,
resistent to NH
3
) or FKM / PTFE glas fibre
laminat
Horn adapter for
increase of
diameter
1.4435
Note! The planar antenna is not resistant to hot vapour and
NH3!
Parabolic, gas-
tight
1.4435 / SS 316 L / PTFE