User's Manual

Commissioning
Page 12
3 Commissioning
3.1 Checks before starting the commissioning
Examine the mechanical and electrical installation after the 973 SmartRadar LT is installed on the tank.
• Check the connections of all electrical cabling
• Check that all ground connections are made
• Check that non-used cable inlets are sealed with appropriate stopping plugs
• Close all covers carefully (mind O-rings) and apply power
3.2 Introduction in programming the 973 SmartRadar LT
The item concept
The 973 SmartRadar LT gauge is a field-configurable multi-processor instrument. This means that the
instrument can be totally programmed out in the field, or remotely, without opening the gauge.
All parameters, settings, etc. are accessible either via the optional PET (Portable Enraf Terminal) or
remotely with the service tool Ensite via so-called items.
These items all have unique 2-letter indexes which allow easy access and programming. Many indexes
associate with an abbreviation of the item description.
There are three different type of items:
Type of item Description
Commands Example:
EX
(exit). After the
EX
command, the instrument starts initialising and
These will force the gauge to execute a special task or function.
modified NOVRAM settings become active.
Data requests Example:
JS
will return the jumper setting on the ICU board. Some of the data
Items for request of setup or measuring data from the gauge.
items are read-only.
NOVRAM Settings
All parameters which can be programmed and should not be lost after power
break
down, are stored in NOVRAM. The NOVRAM is a non-volatile RAM memory which
does not require battery back up.
Data stored in NOVRAM can be protected by a password and/or by the NOVRAM protect jumper
(refer to figure 3.1).
Protection levels are provided for all NOVRAM items, depending on the importance of an item. Protection
level 2 is protected by password 2 (
W2
) and protection level 1 is protected by password 1 (
W1
).
If the NOVRAM is protected by the NOVRAM jumper (jumper J3), level 2 data cannot be changed without
opening the gauge. Most data requests and commands are not password protected.
Protection level 1
Access to items which are not directly measurement related data, such as high level alarm (
HA
), tank
identifier (
TI
), etc. is protected by password 1 (
W1
). It is possible to modify these data only after entering the
correct level 1 password W1=XXXXXX, where XXXXXX is the level 1 password.
Password
W1
itself can be read protected by means of jumper J1 on the ICU board.