Setting Up General Device Parameters; Protecting Access With Passwords; Preventing Settings Overwrites; Setting Measurement Values - ABB LLT100 Operating Instructions Manual

6 Setting up general device parameters

You can set all device-specific parameters from the Device
Setup configuration menu.
Figure 16 Accessing the Device Setup menu
6.1

Protecting access with passwords

To protect access to the instrument settings, you can define
passwords. These passwords, comprised of six alphanumerical
characters, give access to their respective access levels.
To define passwords:
1. From the Device Setup menu, select Access Control >
Standard Password or Advanced Password.
2. In the password edit window, press the Up and Down arrow
keys to move left or right and highlight the alphanumerical
characters that you need to create the password.
3. Press Next to select the highlighted character and move on
to the next character to highlight.
4. Repeat steps 2 and 3 until your password is complete.
5. Press Next one last time, then OK to save your password,
or Cancel to cancel the password that you just created.
The Standard password gives access to the standard access
level, and the Advanced password gives access to the
advanced access level (see "Accessing menus" on page 12).

6.2 Preventing settings overwrites

To prevent inadvertent or malicious overwriting of an
instrument's settings, you can enable software write-
protection. Write protection is disabled by default.
To enable software protection:
1. From the Device Setup menu, select Write Protect >
Software WP.
2. In the Software WP screen, press Edit and select On.
3. Press OK.

6.3 Setting measurement values

The LLT100 can monitor four values. These values are
identified as primary (PV), secondary (SV), tertiary (TV), and
quaternary (QV).
The primary value (PV) is the only value directly linked to
the 4 – 20 mA loop. It impacts other parameters used by the
instrument.
To set these values:
1. From the Device Setup menu, select Process Variables >
Set [chosen value].
2. From the Set [chosen value] screen, select one of four
variables (Level, Ullage, Amplitude, Volume).
As Amplitude is not directly related to level measurement, but
rather to signal strength, it is not available as a primary value.
Also, the value set as PV impacts the PV units available (see
"Setting up the PV unit" on page 19).

6.4 Setting measurement value high and low limits

To define the higher and lower measurement values for the
three LLT100 variables:
1. From the Device Setup menu, select Device Variables >
Level, Volume, or Ullage.
2. From there, select Vessel Empty (LRV) or Vessel Full
(URV).
3. Edit the value for the appropriate limit, as needed, and
press OK.
The limit unit is the one chosen as the PV unit (see "Setting
up the PV unit" on page 19).

6.5 Setting up the process value (PV)

Setting up the process value (PV) is a two-step procedure.
You need to select the PV unit and edit the PV range.
6.5.1 Setting up the PV unit
1. From the Device Setup menu, select PV Setup > PV Unit.
2. From there, select the required unit.
Ullage and Level require level units, whereas Volume
requires volume units. Available units are:
For levels: m, cm, mm, ft, in
For volumes: m , in , ft
3 3
bushel, bbl, bbl liq
, yd , l, hl, gal, I gal (imperial),
3 3
OI-LLT100-EN Rev. D | User Guide 19