Technical information

7500 RTG
10 Varec, Inc.
Operation
Operation Concept
The display of the process value and the configuration
of the Radar Tank Gauge occur locally by means of a
large 4-line alphanumeric display with plain text
information. The guided menu system with integrated
help texts ensures a quick and safe commissioning.
Display and operation can occur in one out of six
languages (English, German, French, Italian, Dutch, and
Spanish). During the first start-up, the instrument
explicitly asks for the desired unit / language.
Remote commissioning, including documentation of
the measuring point and in-depth analysis functions, is
supported via the ToF Tool, the graphical operating
software for Varec instruments.
Access to the electronics can be prevented by means of
a custody locking switch that locks the device settings.
The custody locking switch can be sealed for custody
transfer applications.
On-site Operation
The LC-Display VU331 (Four lines with 20 characters
each.) allows configuration via 3 keys directly at the
instrument. It can be removed to ease operation by
simply pressing the snap-fit. It is connected to the
device by means of a 500 mm cable.
All device functions can be set through a menu system.
The menu consists of function groups and functions.
Within a function, application parameters can be read or
adjusted. The user is guided through a complete
configuration procedure.
LC-Display VU331
To access the display, it is possible to open the cover of
the electronics compartment even in an explosion
hazardous area.
Remote Operation
The ToF Tool is a graphical operation software for
instruments from Varec that operate based on the time-
of-flight principle. It is used to support commissioning,
securing of data, signal analysis, and documentation of
the instruments. It is compatible with the following
operating systems: Win95, Win98, WinNT4.0, Win2000
and Windows XP.
The ToF Tool supports the following functions:
• Online configuration of transmitters
• Signal analysis via envelope curve
• Loading and saving of instrument data (Upload/
Download))
• Documentation of measuring point
Note! More information on the ToF Tool can be found on the
CD-ROM which is supplied with the instrument.
Menu-guided commissioning:
Signal analysis via envelope curve:
• Connection options:
• HART with Commubox FXA191/195
• Service-interface with adapter FXA193 (RS232C) or
FXA291 and ToF Adapter FXA291 (USB)
ToF Tool Operating screen shots
Software Reliability
The software used in the radar instrument 7500 Series
Radar Tank Gauge fulfills the requirements of OIML
R85. This particularly includes:
• cyclical test of data consistency
• non-volatile memory
•segmented data storage
The radar instrument 7500 Series Radar Tank Gauge
continuously monitor the compliance with accuracy
requirements for custody transfer measurements
according to OIML R85. If the accuracy cannot be
maintained, a specific alarm is generated on the local
display and via the digital communication.
E
+
–
3 keys
snap-fit
red LED
green LED
sealing pin
custody locking
switch
LCD
(liquid crystal display)
symbols